Journal Papers


J121. Ran, R., Sun, J., Müftü, S., Gu, A.Z. and Wan, K.T., 2023. In-Plane Rotation of Prolate Colloids Adhered to a Planar Substrate in the Presence of Flow. Langmuir39(18), pp.6487-6494.

J120. Kang, D., Yuan, Z., Li, G., Lee, J., Han, I.L., Wang, D., Zheng, P., Reid, M.C. and Gu, A.Z., 2023. Toward Integrating EBPR and the Short-Cut Nitrogen Removal Process in a One-Stage System for Treating High-Strength Wastewater. Environmental Science & Technology.

J119. Lau, S.S., Feng, Y., Gu, A.Z., Russell, C., Pope, G. and Mitch, W.A., 2023. Cytotoxicity Comparison between Drinking Water Treated by Chlorination with Postchloramination versus Granular Activated Carbon (GAC) with Postchlorination. Environmental Science & Technology.

J118. Li, G., Tooker, N.B., Wang, D., Srinivasan, V., Barnard, J.L., Russell, A., Stinson, B., McQuarrie, J., Schauer, P., Menniti, A. and Varga, E., 2023. Modeling Versatile and Dynamic Anaerobic Metabolism for PAOs/GAOs Competition Using Agent-based Model and Verification via Single Cell Raman Micro-spectroscopy. Water Research, p.120540. doi:

J117. Zhiguo Su, Donghui Wen, April Z Gu, Yuhan Zheng, Yushi Tang, Lyujun Chen. “Industrial effluents boosted antibiotic resistome risk in coastal environments.Environmental International, doi:

J116. Mina Solhtalab, Spencer R Moller, April Z Gu, Deb Jaisi, Ludmilla Aristilde. “Selectivity in Enzymatic Phosphorus Recycling from Biopolymers: Isotope Effect, Reactivity Kinetics, and Molecular Docking with Fungal and Plant Phosphatases.Environmental Science & Technology, doi:

J115.Guangyu Li, Chieh Wu, Dongqi Wang, Varun Srinivasan, David R Kaeli, Jennifer G Dy, April Z Gu. “Machine Leaning-based Determination of Sampling Depth for Complex Environmental Systems: Case Study with Single-Cell Raman Spectroscopy Data in EBPR Systems.” Environmental Science & Technology, doi:

J114. Sheikh Mokhlesur Rahman, Jiaqi Lan, David Kaeli, Jennifer Dy, Akram Alshawabkeh, April Z Gu. “Machine learning-based biomarkers identification from toxicogenomics–Bridging to regulatory relevant phenotypic endpoints.Journal of Hazardous Materials. doi:

J113. Maria Sevillano, Solize Vosloo, Irmarie Cotto, Zihan Dai, Tao Jiang, Jose M Santiago Santana, Ingrid Y Padilla, Zaira Rosario-Pabon, Carmen Velez Vega, José F Cordero, Akram Alshawabkeh, April Gu, Ameet J Pinto. “Spatial-temporal targeted and non-targeted surveys to assess microbiological composition of drinking water in Puerto Rico following Hurricane Maria.Water research X. doi:

J112. Qiyun Zhu, April Gu, Dan Li, Tianmu Zhang, Lunhong Xiang, Miao He. “Online recognition of drainage type based on UV-vis spectra and derivative neural network algorithm.Frontiers of Environmental Science & Engineering. doi:

J111. Guangyu Li, Nicholas B Tooker, Dongqi Wang, Varun Srinivasan, James L Barnard, Andrew Russel, Imre Takacs, Charles Bott, Paul Dobrowski, Annalisa Onnis-Hayden, April Z Gu. “Modeling Side-Stream Enhanced Biological Phosphorus Removal (S2EBPR) System Using Agent-based Model with Adaptive Maintenance, Decay and TCA Metabolism.” doi:

J110. Shifa Zhong, Kai Zhang, Majid Bagheri, Joel G Burken, April Gu, Baikun Li, Xingmao Ma, Babetta L Marrone, Zhiyong Jason Ren, Joshua Schrier, Wei Shi, Haoyue Tan, Tianbao Wang, Xu Wang, Bryan M Wong, Xusheng Xiao, Xiong Yu, Jun-Jie Zhu, Huichun Zhang. “Machine learning: new ideas and tools in environmental science and engineering.” Environmental Science & Technology, 2021, 55 (19), 12741-12754.

 J109. Tao Jiang, Yishan Lin, Carlo Alberto Amadei, Na Gou, Sheikh Mokhlesur Rahman, Jiaqi Lan, Chad D Vecitis, April Z Gu “ Comparative and mechanistic toxicity assessment of structure-dependent toxicity of carbon-based nanomaterials.” Journal of Hazardous Materials, 2021, 418, 126282.

 J108. Yeonsoo Park, Christos D Malliakas, Qing Zhou, April Z Gu, Ludmilla Aristilde “Molecular Coordination, Structure, and Stability of Metal-Polyphosphate Complexes Resolved by Molecular Modeling and X-ray Scattering: Structural Insights on the Biological Fate of Polyphosphate.” Environmental Science & Technology, 2021, 55 (20), 14185-14193

 J107. Z Yuan, D Kang, G Li, J Lee, IL Han, D Wang, P Zheng, MC Reid, AZ Gu. “Combined Enhanced Biological Phosphorus Removal (EBPR) and Nitrite Accumulation for Treating High-strength Wastewater.” doi:

 J106. Dongqi Wang, Yueyun Li, Helen A Cope, Xiaoxiao Li, Peisheng He, Cong Liu, Guangyu Li, Sheikh M Rahman, Nicholas B Tooker, Charles B Bott, Annalisa Onnis-Hayden, Jyoti Singh, Alistair Elfick, Ricardo Marques, Henning J Jessen, Adrian Oehmen, April Z Gu. “Intracellular polyphosphate length characterization in polyphosphate accumulating microorganisms (PAOs): Implications in PAO phenotypic diversity and enhanced biological phosphorus removal performance.” Water Research, 2021, 206 (117626)

J105. Varun N Srinivasan, Guangyu Li, Dongqi Wang, Nicholas B Tooker, Zihan Dai, Annalisa Onnis-Hayden, Charles Bott, Paul Dombrowski, Peter Schauer, Ameet Pinto, April Z Gu. “Oligotyping and metagenomics reveal distinct Candidatus Accumulibacter communities in side-stream versus conventional full-scale enhanced biological phosphorus removal (EBPR) systems.” Water Research, 2021, 206, 117725

 J104. Maria Sevillano, Solize Vosloo, Irmarie Cotto, Zihan Dai, Tao Jiang, Jose M Santiago Santana, Ingrid Y Padilla, Zaira Rosario-Pabon, Carmen Velez Vega, José F Cordero, Akram Alshawabkeh, April Gu, Ameet J Pinto. “Spatial-temporal targeted and non-targeted surveys to assess microbiological composition of drinking water in Puerto Rico following Hurricane Maria.” Water Research, 2021, 13, 100123.

J103. Sheikh Mokhlesur Rahman, Jiaqi Lan, David Kaeli, Jennifer Dy, Akram Alshawabkeh, April Z Gu. “Machine Learning-based Biomarkers Identification and Validation from Toxicogenomics-Bridging to Regulatory Relevant Phenotypic Endpoints.” Journal of Hazardous Materials, 423, 127141doi:

J102. C Cherchi, Y Lin, AZ Gu “Nano-Titanium Dioxide Exposure Impacts Nitrogen Metabolism Pathways in Cyanobacteria.” Environmental Engineering Science, 2021, 38 (6), 469-480

J101. T Zhang, X Zhu, J Guo, AZ Gu, D Li, J Chen. “Toxicity Assessment of Nano-ZnO Exposure on the Human Intestinal Microbiome, Metabolic Functions, and Resistome Using an In Vitro Colon Simulator.” Environmental Science & Technology, 2021, 55, 6884−6896

J100. MM Alam, V Srinivasan, AV Mueller, AZ Gu. “Status and Advances in Technologies for Phosphorus Species Detection and Characterization in Natural Environment-A Comprehensive Review.Talanta, 2021, 122458

 J99. Q Zhu, A Gu, D Li, T Zhang, L Xiang, M He. “Online recognition of drainage type based on UV-vis spectra and derivative neural network algorithm.” Frontiers of Environmental Science & Engineering, 2021, 15(6), 1-9.

J98. T Jiang, CA Amadei, Y Lin, N Gou, SM Rahman, J Lan, CD Vecitis, AZ Gu. “Dependence of Graphene Oxide (GO) Toxicity on Oxidation Level, Elemental Composition, and Size.International Journal of Molecular Sciences 2021, 22 (19),10578.

J97. Solize Vosloo, Maria Sevillano, Ameet Pinto, Irmarie Cotto, Zihan Dai, Tao Jiang, Jose M, Santiago Santana, Ingrid Y Padilla, Zaira Rosario-Pabon, Carmen Velez Vega, José F, Cordero, Akram Alshawabkeh, April Gu, Ameet J Pinto, Linxuan Huo, Christopher L Anderson. “Modified DNeasy PowerWater Kit® protocol for DNA extractions from drinking water samples v1.” Water Research, 2021, 10, 100123

J96. Shi Dong, Zlatan Feric, Guangyu Li, Chieh Wu, April Z Gu, Jennifer Dy, John Meeker, Ingrid Y Padilla, Jose Cordero, Carmen Velez Vega, Zaira Rosario, Akram Alshawabkeh, David Kaeli. “Using Undersampling with Ensemble Learning to Identify Factors Contributing to Preterm Birth.” arXiv:2009.11242. IEEE ICMLA2020, Dec 14-17, Miami, Florida.

J95. Ali Akbari, ZiJian Wang,  Peisheng He,  Dongqi Wang,  Jangho Lee,  IL Han,  Guangyu Li,  April Z. Gu. “Unrevealed roles of polyphosphate-accumulating microorganisms.” Microbial Biotechnology, 06 January 2021.

J94. B Cao, AZ Gu, PY Hong, R Ivanek, B Li, A Wang, JY Wu. “Editorial perspective: viruses in wastewater: wading into the knowns and unknowns.” Environ Res. 2020 Oct 6: 110255.

J93. Z Yuan, D Kang, G Li, J Lee, IL Han, D Wang, P Zheng, MC Reid, AZ Gu. “Combined Enhanced Biological Phosphorus Removal (EBPR) and Nitrite Accumulation for Treating High-strength Wastewater.” BioRxiv

J92. Carla Cherchi, YiShan Lin and April Z. Gu. “Nano-Titanium Dioxide Exposure Impacts Nitrogen Metabolism Pathways in Cyanobacteria.” Environmental Engineering Science, 2020, Nov.

J91. D Wang, P He, Z Wang, G Li, N Majed, AZ Gu. “Advances in single cell Raman spectroscopy technologies for biological and environmental applications.Current Opinion in Biotechnology, invited, Volume 64, August 2020, Pages 218-229.

J90. Yishan Lin, Maria Sevillano Rivera, Tao Jiang, Guangyu Li, Irmarie Cotto, Solize Vosloo, Corey MG Carpenter, Philip Larese-Casanova, Roger W Giese, Damian E Helbling, Ingrid Y Padilla, Zaira Rosario-Pabón, Jose F Cordero, Carmen Vélez Vega, Akram N Alshawabkeh, Ameet Pinto, April Z Gu. “Impact of Hurricane Maria on Drinking Water Quality in Puerto Rico.” Environ. Sci. Technol. 2020, 54, 15, 9495–9509.

J89. NB Tooker, C Gao, A OnnisHayden, AZ Gu. “Impact of Oxidation Processes on the Composition and Biodegradability of Soluble Organic Nutrients in Wastewater Effluents.” Water Environment Research, 2020/7/8,

J88. N Majed and AZ Gu. “Phenotypic dynamics in polyphosphate and glycogen accumulating organisms in response to varying influent C/P ratios in EBPR systems.” Science of The Total Environment, 2020/7/4, 140603,

J87. Justin Manjourides, Emily Zimmerman, Deborah Watkins, Thomas Carpenito, Carmen Vélez-Vega, Gredia Huerta-Montañez, Zaira Rosario, Ishwara Ayala, Carlos Vergara, Zlatan Feric, Mathra Ondras, Helen H. Suh, April Z. Gu, Phil Brown, José F. Cordero, John D. Meeker, Akram Alshawabkeh “Cohort profile: Center for Research on Early Childhood Exposures in Puerto Rico (CRECE)”. BMJ Open, 2020/7/1, V 10, issue 7, e036389.

J86. J Sun, R Ran, S Muftu, AZ Gu, KT Wan. “The mechanistic aspects of microbial transport in porous media.” Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2020/6/20, 125169,

J85. Xing Zheng, Tong Liu, Menghan Guo, Dong Li, Na Gou, Xin Cao, Xiaopeng Qiu, Xiaoliang Li, Yaozhong Zhang, Guoping Sheng, Baozhu Pan, April Z Gu, Zhanbin Li. “Impact of heavy metals on the formation and properties of solvable microbiological products released from activated sludge in biological wastewater treatment.” Water Research, 2020, 115895,

J84. SS Pochiraju, K Linden, AZ Gu, J Rosenblum. “Development of a separation framework for effects-based targeted and non-targeted toxicological screening of water and wastewater.” Water Research 170, 2020, 115289,

J83. T Jiang, CA Amadei, N Gou, Y Lin, J Lan, CD Vecitis, AZ Gu  “Toxicity of single-walled carbon nanotubes (SWCNTs): effect of lengths, functional groups and electronic structures revealed by a quantitative toxicogenomics assay”. Environmental Science: Nano 7 (5), 1348-1364.

J82. Yaozhong Zhang, Yifan Wang, Xin Cao, Dr Jinkai Xue, Qian Zhang, Jiayu Tian,Xiaoliang Li, Xiaopeng Qiu, Baozhu Pan, April Gu and Xing Zheng “Effect of carboxyl and hydroxyl groups on adsorptive polysaccharide fouling: A comparative study based on PVDF and graphene oxide (GO) modified PVDF surfaces.”Journal of Membrane Science. Volume 595, 1 February 2020, 117514,

J81. Dongqi Wang, ; Nicholas B Tooker; Varun Srinivasan, ; Guangyu Li; Loretta A Fernandez,Peter Schauer; Adrienne Menniti; Chris Maher; Charles B Bott; Paul Dombrowski; James L Barnard,  Annalisa Onnis-Hayden; April Z Gu. “Side-Stream Enhanced Biological Phosphorus Removal (S2EBPR) Process Improves System Performance – A Full-Scale Comparative Study.” Water Research, Volume 167, 15 December 2019, 115109,

J80. Annalisa Onnis-Hayden, Varun Srinivasan, Nicholas B. Tooker, Guangyu Li, Dongqi Wang, James L. Barnard, Charles Bott, Paul Dombrowski, Peter Schauer, Adrienne Menniti, Andrew Shaw, Beverly Stinson, Gerry Stevens, Patrick Dunlap, Imre Takács, Jim McQuarrie, Heather Phillips, Angela Lambrecht, Howard Analla, Andy Russell, and April Z. Gu1, “Survey of Full Scale Side-Stream Enhanced Biological Phosphorus Removal (S2EBPR) Systems and Comparison with Conventional EBPRs in North America: Process Stability, Kinetics and Microbial Populations.” Water Environment Research

J79. Annalisa Onnis-Hayden, Nehreen Majed, Yueyun Li1, Sheikh Mokhlesur Rahman, Douglas Drury, LeAnna Risso, and April Z. Gu/ “Impact of Solid Residence Time (SRT) on Functionally Relevant Microbial Populations and Performance in Full-scale Enhanced Biological Phosphorus Removal (EBPR) Systems.Water Environment Research.

J78. Shanshan Xie , April Z. Gu, Tianyu Cen, Dan Li , Jianmin Chen. “ The effect and mechanism of urban fine particulate matter (PM2.5) on horizontal transfer of plasmid-mediated antimicrobial resistance genes.Science of the Total Environment (2019), 683, 116-123.

J76. Nimet Yildirim-Tirgil, Jinyoung Lee, Hanchul Cho, HeaYeon Lee, Sivasubramanian Somu, Ahmed Busnaina and April Z. Gu “A SWCNTs based Aptasensor System for Antibiotic Oxytetracycline Detection in Water Samples ” Analytical Methods, 2019 11(20), 2692-2699.

J75. Linwei Wu, Daliang Ning, Bing Zhang, Yong Li, Ping Zhang, Xiaoyu Shan, Qiuting Zhang, Mathew Brown, Zhenxin Li, Joy D. Van Nostrand, Fangqiong Ling, Naijia Xiao, Ya Zhang, Julia Vierheilig, George F. Wells, Yunfeng Yang, Ye Deng, Qichao Tu, Aijie Wang, Global Water Microbiome Consortium, Tong Zhang, Zhili He, Jurg Keller, Per H. Nielsen, Pedro J. J. Alvarez, Craig S. Criddle, Michael Wagner, James M. Tiedje, Qiang He, Thomas P. Curtis, David A. Stahl, Lisa Alvarez-Cohen, Bruce E. Rittmann, Xianghua Wen & Jizhong Zhou “Global diversity and biogeography of bacterial communities in wastewater treatment plants.” Nature Microbiology (2019). 13 May 2019,

J74. Shi Dong, Zlatan Feric, Xiangyu Li, Sheikh Mokhlesur Rahman*, Guangyu Li*, Chieh Wu, April Z Gu, Jennifer Dy, David Kaeli, John Meeker, Ingrid Y Padilla, Jose Cordero, Carmen Velez Vega, Zaira Rosario, Akram Alshawabkeh. “A Hybrid Approach to Identifying Key Factors in Environmental Health Studies.” Conference proceeding: 2018 IEEE International Conference on Big Data (Big Data).

J73. Xiangyang Li, April Z.Gu, Ye Zhang, Bin Xie, Dan Li and JianminChen “Sub-lethal concentrations of heavy metals induce antibiotic resistance via mutagenesis.”Journal of Hazardous Materials, Volume 369, 5 May 2019, Pages 9-16.

J72. Mark M Muenter, Ariel Aiken, Jadesola O Akanji, Samir Baig, Sirine Bellou, Alyssa Carlson, Charles Conway, Courtney M Cowell, Nicholas A DeLateur, Alexis Hester, Christopher Joshi, Caitlin Kramer, Becky Leifer, Emma Nash, Macee Qi, Meghan Travers, Kelly C Wong, Man Hu*, Na Gou*, Roger W Giese, April Z Gu, Penny J Beuning. “The Response of Escherichia coli to the Alkylating Agents Chloroacetaldehyde and Styrene Oxide.” Mutation Research/Genetic Toxicology and Environmental Mutagenesis. 2019.Volume 840, April 2019, Pages 1-10.

J71. Erika Varga,  Hélène Hauduc,  James Barnard,  Patrick Dunlap,  Jose Jimenez, Adrienne Menniti,  Peter Schauer,  Carlos M. Lopez Vazquez,  April Z. Gu, Mathieu Sperandio,  Imre Takács. “Recent advances in bio-P modelling – a new approach verified by full-scale observations.” Water Sci Technol(2018) 78 (10): 2119-2130.

J70. Li, Yueyun*; Rahman, Sheikh*; Li, GuangYu*; Fowle, william ; Nielsen, Per Halkjær; Gu, April  “The Composition and Implications of Polyphosphate-Metal in Enhanced Biological Phosphorus Removal Systems” Environmental science & technology53 (3), 1536-1544.

J69. D. Li* and April Z Gu “Antibacterial resistance: A new threat from disinfection byproducts and disinfection of drinking water?” Current Opinion in Environmental Science & Health, invited paper.

J68. Y Li*, HA Cope, SM Rahman*, G Li*, PH Nielsen, APD Elfick, AZ Gu “Towards Better Understanding of EBPR Systems via Linking Raman-Based Phenotypic Profiling with Phylogenetic Diversity.” Environ Sci Technol. 2018 Aug 7;52(15):8596-8606.

J67. Ye Zhang, April Z Gu, Shanshan Xie, Xiangyang Li, Tianyu Cen, Dan Li, Jianmin Chen “Nano-metal oxides induce antimicrobial resistance via radical-mediated mutagenesis.” Environment International,Volume 121, Part 2, December 2018, Pages 1162-1171.

J66. SM Rahman*, MJ Eckelman, A Onnis-Hayden*, AZ Gu “Comparative Life Cycle Assessment of Advanced Wastewater Treatment Processes for Removal of Chemicals of Emerging Concern.” Environ. Sci. Technol., 2018.

J65. Jianfeng Sun, Sinan Müftü, April Z. Gu and Kai-tak Wan “Intersurface Adhesion in the Presence of Capillary Condensation.” Journal of Applied Mechanics, 2018, 85 (6), 061009.

J64. Lan, Jiaqi*, Rahman, Sheikh*, Gou, Na*, Jiang, Tao*, Plewa, Michael, Akram Alshawabkeh and Gu, April. “Genotoxicity Assessment of Drinking Water Disinfection By-products (DBPs) by DNA Damage and Repair Pathway Profiling AnalysisEnvironmental Science & Technology, 2018, 52 (11), pp 6565–6575.

J63. Jianfeng Sun, Nil Tandogan, April Z Gu, Sinan Muftu, Edgar D Goluch, and Kai-Tak Wan “Quantification of Colloidal Filtration of Polystyrene Micro-particles on Glass Substrate using A Microfluidic Device.” Colloids and Surfaces B: Biointerfaces, 2018,165, 381-387.

J62. Ye Zhang, April Z. Gu, Tianyu Cen, Dan Li, Jianmin Chen. “Petrol and Diesel Exhaust Particles Accelerate the Horizontal Transfer of Plasmid-mediated Antimicrobial Resistance Genes in Environment.” Environment International,2018, 114, 280-287.

J61. Ye Zhang, April Z. Gu, Tianyu Cen, Xiangyang Li, Dan Li, Miao He “Sub-inhibitory Concentrations of Heavy Metals Facilitate the Horizontal Transfer of Plasmid-Mediated Antibiotic Resistance Genes in Water Environment.” Environment International, Environmental Pollution  2018, 237, 74-82.

J60. Zhang, Ye; Gu, April Z.; He, Miao; Li, Dan “Sub-inhibitory Concentrations of Disinfectants Promote the Horizontal Transfer of Multidrug Resistance Genes within and across Genera.” Environmental Science & Technology 2017, 51(1), pp570-580.

J59. Men, Yujie; Han, Ping; Helbling, Damian; Jehmlich, Nico; Herbold, Craig; Onnis-Hayden, Annalisa; Gu, April Z.; Johnson, David R.; Wagner, Michael; Fenner, Kathrin “Biotransformation of two pharmaceuticals by an ammonia-oxidizing archaeon Nitrososphaera gargensis” Environmental Science & Technology 2016, 50 (9), pp 4682–4692.

J58. Lan, Jiaqi; Gou, Na; Rahman, Sheikh; Gao, Ce; He, Miao; Gu, April  “A Quantitative Toxicogenomics Assay for High-throughput and Mechanistic Genotoxicity Assessment and Screening of Environmental Pollutants” Environmental Science & Technology 2016, 50 (6), pp 3202–3214.

J57. Li, Dan; zeng, siyu; He, Miao; Gu, April “Water Disinfection Byproducts Select for Antibiotic Resistance-Role of Environmental Pollutants in Resistance Phenomena” Environmental Science & Technology 2016, 50 (6), pp 3193–3201.

J56. Rahman, Sheikh; Eckelman, Matthew; Onnis-Hayden, Annalisa; Gu, April “Life Cycle Assessment of Advanced Nutrient Removal Technologies for Wastewater Treatment” Environmental Science & Technology 2016, 50 (6), pp 3020–3030.

J55. Abadian PN, Yildrim N. , Gu A.Z. and Goluch E “SPRi-based adenovirus detection using a surrogate antibody method” Biosensors & Bioelectronics 74:808-814 · JULY 2015.

J54. Jiaqi Lan, Man Hu, Ce Gao, Akram Alshawabkeh, and April Z. Gu “Toxicity Assessment of 4‐Methyl-1-cyclohexanemethanol and Its Metabolites in Response to a Recent Chemical Spill in West Virginia, USA” Environmental Science & Technology 2015, 49 (10), 6284–6293.

J53. Gao Ce, Weisman David, Lan JiaQi, Gou Na and Gu April Z. “Toxicity Mechanisms Identification via Gene Set Enrichment Analysis of Time-Series Toxicogenomics Data: Impact of Time and Concentration” Environmental Science & Technology 2015, 49 (7), 4618–4626.

J52. Carla Cherchi, Milos Miljkovic, Max Diem and April Z. Gu, “nTiO2 Induced Changes in Intracellular Composition and Nutrient Stoichiometry in Primary Producer-Cyanobacteria”  Science of the total environment, 512–513, 15 April, 2015, 345 –352.

J51. Y. Lin; D. Li*; A.Z. Gu; S. Zeng and M. He “Bacterial regrowth in water reclamation and distribution systems revealed by viable bacterial detection assays.” Chemosphere 2015, 144, 2165-2174.

J50. Qin C, Liu H, Liu L, Smith S, Sedlak DL, Gu AZ  “Bioavailability and characterization of dissolved organic nitrogen and dissolved organic phosphorus in wastewater effluents.” Science of the total environment. 2014, 511C: 47-53.

J49. N.Yildirim, F. Long,C.Gao,  M. He, H-Cg Shi and A. Z. Gu. “A portable DNAzyme-based optical biosensor for highly sensitive and selective detection of lead (II) in wastewater.” Talanta 129 (2014), 617–622.

J48. N.Yildirim, F. Long, M. He, H-Cg Shi and A. Z. Gu. A Portable Optic Fiber Aptasensor for Sensitive, Specific and Rapid Detection of Bisphenol-A in Water Samples. Environ Sci: Process & Impacts. 2014 May, 16(6):1379-86.

J47. Jiaqi Lan, Na Gou, Ce Gao, Miao He, and A. Z. Gu, “Comparative and Mechanistic Genotoxicity Assessment of Nanomaterials via A Quantitative Toxicogenomics Approach Across Multiple Species.” Environmental Science & Technology, 2014, 48 (21), pp 12937–12945.

J46. Na Gou, Songhu Yuan, Jiaqi Lan, Ce Gao, Akram N. Alshawabkeh, and A.Z. Gu “Quantitative Toxicogenomics Assay Reveals the Evolution and Nature of Toxicity during Environmental Pollutants Transformation.” Environmental Science and Technology, 2014:48(15) 8855-8863.

J45. Yueyun Li*, Xin Wang*, Annalisa Onnis-Hayden*, Kai-Tak Wan and April Z. Gu. “Universal Quantifier Derived from AFM Analysis Links Cellular Mechanical Properties and Cell-Surface Integration Forces with Microbial Deposition and Transport Behavior.” Environmental Science & Technology, 2014, 48(3): 1769-1778.

J44. Khatri M., Bello D., Pal A.K., Cohen J.M., Woskie S., Gassert T., Lan J.*, Gu A.Z., Demoktritou P. and Gaines P.  “Evaluation of cytotoxic genotic and inflammatory reponses of nanoparticles from photocopiers in three human cell lines.”  Particle and Fibre Toxicology, 2014, 10:42,

J43. Xin Wang*, YueYun Li*, April Z Gu, Kai-Tak Wan, “Predicting Macroscopic Colloidal Deposition and Transportation Based on Dimensionless Tabor’s Parameter“, Nano LIFE, 2013, 3 (1): 1340009.

J42. SongHu Yuan*, Na Gou*, Aram Alshawabkeh and April Z Gu. “Efficient degradation of contaminants of emerging concerns by a new electro-Fenton process with Ti/MMO cathode.” Chemosphere, 2013, 93(11), 2796-2804.

J41. Dan Li*, SiyuZeng, April Z. Gu, Miao He and Hanchang Shi. “Inactivation, Reactivation And Regrowth Of Indigenous Bacteria In Reclaimed Water After Chlorine Disinfection Of A Municipal Wastewater Treatment Plant.” Journal of Environmental Science, 2013, 25 (7), 1319-1325.

J40. Dan Li*, April Z. Gu and Miao He. “Quantification and genetic diversity of total and microcystin-producing Microcystis during blooming season in Tai and Yang-cheng lakes, China.” Journal of Applied Microbiology, 2014, 116(6): 1482-1494.

J39. Jiayi Shi, Sinan Muftu, April Gu, Kai-Tak Wan. “Adhesion of a Cylindrical Shell in the Presence of DLVO Surface Potential.” Journal of Applied Mechanics, 2014, 80(6): 061007.

J38. Sean T. O’Connor, Jiaqi Lan*, Matthew North, Alexandre Loguinov, Luoping Zhang, Martyn T. Smith, April Gu and Chris Vulpe “Genome-wide functional and stress response profiling reveals toxic mechanism and genes required for tolerance to benzo[a]pyrene in S. cerevisiae.” Frontiers in Genetics, 2013, 3, 316.

J37. Ce Gao*, David Weisman, Valentin Ilyin and April Z. Gu. “Analyzing High-Dimensional Toxicogenomic Data Using Consensus Clustering.” Environmental Science & Technology, 2012, 46(15): 8413-8421.

J36. Majed N*, Li Y and Gu AZ, “Advances in Techniques for Phosphorus Analysis In Biological Resources.” Current Opinion in Biotechnology, invited paper, 2012, 23, 1-8.

J35. Nehreen Majed*, Tatyana Chernenko, Max Diem and April Z. Gu. “Identification of Functionally Relevant Populations in Enhanced Biological Phosphorus Removal Processes Based On Intracellular Polymers Profiles and Insights into the Metabolic Diversity and Heterogeneity.” Environmental Science & Technology, 2012, 46(9): 5010-5017.

J34. Long F*; Gu C, Gu, AZ, and Shi HC, “Quantum-dot/carrier-protein/haptens Conjugate as a Detection Nanobioprobe for FRET-based Immunoassay of Small Analytes with All-fiber Microfluidic Biosensing Platform.” Analytical Chemistry, 2012, 84(8), 3646-3653.

J33. Xin W*, Li, Y*, Onnis-Hayden A*, Gao C*, Gu AZ and Wan KT, “Correlation of macroscopic aggregation behavior and microscopic adhesion properties of bacteria strains using a dimensionless Tabor’s parameter,” Journal of Colloid and Interface Science, 2012, 374, 70-76.

J32. Bucci, V, Majed, N*, Hellweger, F and Gu, AZ, “Heterogeneity of Intracellular Polymer Storage States in Microbial Populations Relevant to Enhanced Biological Phosphorus Removal Processes: Model Prediction and Experimental Validation.” Environmental Science & Technology, 2012, 46(6), pp. 3244-3252.

J31. Yildirim N*, Long F*, Gao C *, He M, Shi HC and Gu AZ, “Aptamer-based Optical Biosensor for Rapid and Sensitive Detection of 17b-Estradiol in Water Samples.” Environmental Science & Technology, 2012, 46(6), 3288-3294.

J30. Cherchi C*, Chernenko T, Diem M, Gu AZ, “Impact of Nano Titanium Dioxide Exposure on Cellular Structure of Anabaena Variabilis and Evidence of Internalization.” Environmental Toxicology and Chemistry, 2011, 30(4), pp. 861-869.

J29. Gou N*, Gu AZ, “A New Transcriptional Effect Level Index (TELI) for Toxicogenomics-based Toxicity Assessment,” Environmental Science & Technology, 2011, 45(12), pp. 5410-5417.

J28. Gu AZ, Liu L*, Neethling JB, Stensel HD, Murthy S, “Treatability and Fate of Various Phosphorus Fractions in Different Wastewater Treatment Processes,” Water Science and Technology, 2011, 63(4), pp. 804-810.

J27. Cherchi C*, Gu AZ, “Effect of Bacterial Growth Stage on Resistance to Chlorine Disinfection,” Water Science and Technology, 2011, 64(1), pp. 7-13.

J26. Li D**, Gu AZ, Zeng SY, Yang W, He M, Shi HC, “Monitoring and Evaluation of Infectious Rotaviruses in Various Wastewater Effluents and Receiving Waters Revealed Correlation and Seasonal Pattern of Occurrences,” Journal of Applied Microbiology, 2011, 110(5), pp.1129-1137.

J25. Li D**, Gu AZ, Yang W., He M, Shi HC, “Evaluation of The Infectivity, Genome and Antigenicity Persistence of Rotavirus After Chlorine Disinfection,” Journal of Environmental Science, 23(10), 1691-1698.

J24. Long F**, Gao C*, Shi HC, He M, Zhu AN, Klibanov AM, Gu AZ, “Reusable Evanescent Wave DNA Biosensor for Rapid, Highly Sensitive, and Selective Detection of Mercury Ions,” Biosensors and Bioelectronics, 2011, 26(10), pp. 4018-4023.

J23. Onnis-Hayden A**, Hsu BB, Klibanov AM, Gu AZ, “An Antimicrobial Polycationic Sand Filter for Water Disinfection,” Water Science and Technology, 2011, 63(9), pp. 1997-2003.

J22. Onnis-Hayden A**, Majed N*, Schramm A, Gu AZ, “Process Optimization By Decoupled Control of Key Microbial Populations: Distribution of Activity and Abundance of Polyphosphate-Accumulating Organisms and Nitrifying Populations in A Full-Scale IFAS-EBPR Plant,” Water Research, 2011, 45(13), pp. 3845-3854.

J21. Schuler AJ, Majed N*, Bucci V, Hellweger FL, Tu Y, Gu AZ, “Is The Whole The Sum of Its Parts? Agent-Based Modelling of Wastewater Treatment Systems,” Water Science and Technology, 2011, 63(8), pp. 590-1598.

J20. Yang W, Gu AZ, Zeng SY, Li D**, He MA, Shi HC, “Development of A Combined Immunomagnetic Separation and Quantitative Reverse Transcription-PCR Assay for Sensitive Detection of Infectious Rotavirus in Water Samples,” Journal of Microbiological Methods, 2011, 84(3), pp. 447-453.

J19. Cherchi C*, Gu AZ, “Impact of Titanium Dioxide Nanomaterials on Nitrogen Fixation Rate and Intracellular Nitrogen Storage in Anabaena variabilis,” Environmental Science & Technology, 2010, 44(21), pp. 8302-8307.

J18. Gou N*, Onnis-Hayden A**, Gu AZ, “Mechanistic Toxicity Assessment of Nanomaterials by Whole-Cell-Array Stress Genes Expression Analysis,” Environmental Science & Technology, 2010, 44(15), pp. 5964-5970.

J17. Li D**, Gu AZ, Yang W, He MA, Hu XH, Shi HC, “An Integrated Cell Culture and Reverse Transcription Quantitative PCR Assay for Detection of Infectious Rotaviruses in Environmental Waters,” Journal of Microbiological Methods, 2010, 82(1), pp. 59-63.

J16. Majed N*, Gu AZ, “Application of Raman Microscopy for Simultaneous and Quantitative Evaluation of Multiple Intracellular Polymers Dynamics Functionally Relevant to Enhanced Biological Phosphorus Removal Processes,” Environmental Science & Technology, 2010, 44(22), pp. 8601-8608.

J15. Cherchi C*, Onnis-Hayden A**, El-Shawabkeh I, Gu AZ, “Implication of Using Different Carbon Sources for Denitrification in Wastewater Treatments,” Water Environment Research, 2009, 81(8), pp. 788-799.

J14. Hellweger FL, Bucci V, Litman MR**, Gu AZ, Onnis-Hayden A**, “Biphasic Decay Kinetics of Fecal Bacteria in Surface Water Not a Density Effect,” Journal of Environmental Engineering-ASCE, 2009, 135(5), pp. 372-376.

J13. Li D**, Gu AZ, He M, Shi HC, Yang W, “UV Inactivation and Resistance of Rotavirus Evaluated By Integrated Cell Culture and Real-Time RT-PCR Assay,” Water Research, 2009, 43(13), pp. 3261-3269.

J12. Majed N*, Matthaus C, Diem M, Gu AZ, “Evaluation of Intracellular Polyphosphate Dynamics in Enhanced Biological Phosphorus Removal Process Using Raman Microscopy,” Environmental Science & Technology, 2009, 43(14), pp. 5436-5442.

J11. Onnis-Hayden A**, Weng HF, He M, Hansen S, Ilyin V, Lewis K, Gu AZ, “Prokaryotic Real-Time Gene Expression Profiling for Toxicity Assessment,” Environmental Science & Technology, 2009, 43(12), pp. 4574-4581.

J10. Gu AZ, Neethling JB, “Investigation and Modeling of Solar UV-Induced Chlorine Decay in Disinfection Contact Basins at Full-Scale Wastewater Treatment Plants,” Water Environment Research, 2008, 80(2), pp.179-185.

J9. Gu AZ, Saunders A, Neethling JB, Stensel HD, Blackall LL, “Functionally Relevant Microorganisms to Enhanced Biological Phosphorus Removal Performance at Full-Scale Wastewater Treatment Plants in the United States,” Water Environment Research, 2008, 80(8), pp. 688-698.

J8. He S, Gu AZ, McMahon KD, “Progress Toward Understanding the Distribution of Accumulibacter Among Full-Scale Enhanced Biological Phosphorus Removal Systems,” Microbial Ecology, 2008, 55(2), pp. 229-236.

J7. Benisch M, Clark, D, Neethling, JB, Fredrickson, HS, Gu, AZ, “Tertiary Phosphorus Removal Pilot Tests Technology Limits in Coeur D’Alene, ID,” Water Practice, 2007, 1(13), pp. 1-13.

J6. Gu AZ, Pedros PB, Kristiansen A, Onnis-Hayden A**, Schramm A, “Nitrifying Community Analysis in a Single Submerged Attached-Growth Bioreactor for Treatment of High-Ammonia Waste Stream,” Water Environment Research, 2007, 79(13), pp. 2510-2518.

J5. He S, Gu AZ, McMahon KD, “Fine-Scale Differences Between Accumulibacter-Like Bacteria in Enhanced Biological Phosphorus Removal Activated Sludge” Water Science and Technology, 2006, 54(1), pp. 111-117.

J4. Gu AZ, Hedlund BP, Staley JT, Strand SE, Stensel HD, “Analysis and Comparison of the Microbial Community Structures of Two Enrichment Cultures Capable of Reductively Dechlorinating TCE and cis-DCE” Environmental Microbiology, 2004, 6(1), pp. 45-54.

J3. Walker CB, Gu AZ, Stensel HD, Strand SE, “A Biological Method for Synthesizing C-14-Vinyl Chloride,”Journal of Labelled Compounds & Radiopharmaceuticals, 2004, 47(13), pp. 903-910.

J2. Gu AZ, Stensel HD, Pietari JMH, Strand SE, “Vinyl Bromide as a Surrogate for Determining Vinyl Chloride Reductive Dechlorination Potential,” Environmental Science & Technology, 2003, 37(19), pp. 4410-4416.

J1. Basu B, Gu, Z., and Shilinsky, K., “Application of Packed Scrubber for Air Emissions Control in Municipal Wastewater Treatment Plants,” Environmental Progress, 1999, 17(1), pp. 9-18.

Other Peer Reviewed Publications (T)

T8. Annalisa Onnis-Hayden, Dongqi Wang, Ali Akbari, Mi Nguyen, April Z Gu. “Decarbonization potentials in phosphorus management in the water sector” To be published by International Water Association (IWA) Publishing, 2022

T7. April Z. Gu, Nicholas Tooker, Annalisa Onnis-Hayden, Dongqi Wang, Guangyu Li, Varun Srinivasan and Imre Takács, “Investigation of the Mechanisms for Optimization and Design of a Side-Stream EBPR Process as a Sustainable Approach for Achieving Stable and Efficient Phosphorus Removal.” To be published by Water Environmental Research Foundation (WERF) and International Water Association (IWA) Publishing, 2018 WE&RF.

T6. April Z. Gu, Sheikh Mokhlesur Rahman, Matthew J. Eckelman and Annalisa Onnis-Hayden “Sustainability Evaluation Of Nutrient And Contaminants Of Emerging Concern Removal Technologies Using Life Cycle Assessment” Water Environmental Research Foundation (WERF) and International Water Association (IWA) Publishing, 2017 WE&RF ISBN: 978-1-941242-54-4. 82 pages. 

T5. Gu AZ and Nicholas Tooker “Impact Of Advanced Oxidation Processes On The Composition And Biodegradability Of Soluble Organic Nutrients” Water Environmental Research Foundation (WERF) and International Water Association (IWA) Publishing 2015 ISBN: 978-1-78040-804-0. 70 pages. 

T4. Gu AZ, Chao Qin, Lei Liu, Onnis-Hayden, Haizhou Liu, David L. Sedlak and Scott Smith. “Bioavailability and Characteristics of Dissolved Organic Nutrients in Wastewater Effluents”. Water Environmental Research Foundation (WERF) and International Water Association (IWA) Publishing, 2014 IBN# 978-1-78040-556-8/1-78040-556-1. 94 pages.

T3. April Z Gu, Lei Liu and Annalisa Onnis-Hayden (2014). Phosphorus Fractions and Removal in Wastewater Treatment- Implications for Minimizing Effluent Phosphorus. IWA publishing, Water Environment Research Foundation, ISBN # 978-1-78040-689-3/1-78040-689-4, 136 pages. 

T2. Gu AZ, Onnis-Hayden A, “Protocol to Evaluate Alternative External Carbon Sources for Denitrification at Full-scale Wastewater Treatment Plants.” WERF (Water Environmental Research Foundation) and IWA (International Water Association) and Publishing. Stock No. NUTR 1R06B, ISBN No. 978-1-84339-618-5, 2010. 120 pages.

T1. Neethling JB, Bakke B, Benisch M, Gu AZ, Stephens H, Stensel HD, Moore R, “Factors Influencing The Reliability of Enhanced Biological Phosphorus Removal” Water Environmental Research Foundation (WERF) and International Water Association (IWA) Publishing, ISBN No. 1-84339-740-4, 2005. 202 pages.