Article
Environmental Sciences
Wenbo Liu, Md Hasibur Rahaman, Jun Zhai, Jacek Makinia
Summary: The study investigated the coupling transformation of carbon, nitrogen, and sulfur compounds in a full-scale horizontal subsurface flow wetland. Results showed that heterotrophic denitrification and sulfide-based autotrophic denitrification were the main pathways. Increasing TOC or NO3- concentrations promoted heterotrophic denitrification, while increasing S2- concentrations enhanced sulfide-based autotrophic denitrification.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Jose Joaquin Gonzalez-Cortes, Sandra Torres-Herrera, Fernando Almenglo, Martin Ramirez, Domingo Cantero
Summary: The use of a continuous stirred tank bioreactor (CSTBR) under anoxic conditions for biogas desulfurization and S production was proposed. The optimal operating conditions were determined, resulting in high removal efficiency and sulfur production rates.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Wei Wen Wong, Chris Greening, Guy Shelley, Rachael Lappan, Pok Man Leung, Adam Kessler, Brandon Winfrey, Seng Chee Poh, Perran Cook
Summary: The study investigated the impact of nitrogen pollution on permeable sediments dominated by the world's coastlines and continental shelves, finding that drift algae biomass and nitrate exposure significantly influence nitrogen cycling. Presence of drift algae dramatically increased DNRA and N2O production, while nitrate treatment led to decreases in both and an increase in denitrification. These findings suggest new feedbacks between eutrophication and greenhouse gas emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Adam C. Gold, Suzanne P. Thompson, Michael F. Piehler
Summary: Stormwater wet ponds (SWPs) are important nitrogen sinks that have seasonal variation in nitrogen cycling, affecting pond nitrogen removal. Sediments in SWPs generally function as total nitrogen (TN) sinks during nitrate-enriched conditions, but the fate of nitrate varies based on factors such as water temperature, dissolved organic nitrogen concentrations, and sediment oxygen uptake. This study suggests that coastal stormwater ponds may host reduced conditions that promote nitrate retention over denitrification, highlighting the need for further research on the fate of retained nitrate in SWP sediments and its impact on downstream water quality.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Julie M. Rose, J. Stephen Gosnell, Suzanne Bricker, Mark J. Brush, Allison Colden, Lora Harris, Eric Karplus, Alix Laferriere, Nathaniel H. Merrill, Tammy B. Murphy, Joshua Reitsma, Johnny Shockley, Kurt Stephenson, Seth Theuerkauf, Dan Ward, Robinson W. Fulweiler
Summary: Nitrogen pollution poses a significant threat to coastal water quality globally, leading to an increasing demand for governmental regulations and marine policy to address nitrogen pollution. In situ nitrogen reduction practices, including the potential contributions of coastal bivalve shellfish to enhanced denitrification, are being considered as complementary management approaches. However, the incorporation of bivalve-enhanced denitrification into water quality policy remains limited, despite evidence suggesting its effectiveness in nitrogen removal.
ESTUARIES AND COASTS
(2021)
Article
Environmental Sciences
Paraskevi Mara, Virginia P. Edgcomb, Taylor R. Sehein, David Beaudoin, Chuck Martinsen, Christina Lovely, Bridget Belcher, Rebecca Cox, Meghan Curran, Claire Farnan, Peter Giannini, Sarah Lott, Kyle Paquette, Anna Pinckney, Natalie Schafer, Tonna-Marie Surgeon-Rogers, Daniel R. Rogers
Summary: The study found that oyster aquaculture plays a positive role in the removal of nitrogen from sediments, but different farming methods show variations in gene expression related to nitrogen cycling and nitrogen gas flux. Particularly, nitrogen retention process is significantly enhanced, especially under the bottom cages.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Engineering, Environmental
Bingbing Ma, Xiaojing Zhang, Denghui Wei, Yongpeng Ma, Qiong Wang, Han Zhang, Jiajie Zhang
Summary: This study analyzed the suitable pH for the coupling process in a biofilter and found that the process could operate normally at pH of 6.5-8.5 with high total nitrogen removal efficiency. The highest TNRE was observed at pH 7.5. The variations in activity and gene concentration at different pH values revealed the response mechanism of the coupling process.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Marine
Stephanie Mangan, Andrew M. Lohrer, Simon F. Thrush, Joanne I. Ellis, Conrad A. Pilditch
Summary: Anthropogenic increases in nutrient delivery have fundamentally altered the biogeochemical cycling in the marine coastal zone, with potential ecological shifts. Long-term enrichment and ecological complexity have limited our ability to effectively manage and prevent these changes.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Hualei Yang, Xuechu Chen, Chunsong Zhang, Mingming Zhao, Xinmeng Zhao, Danielle C. Perry, Jianwu Tang
Summary: Coastal wetlands are important for nitrogen removal and carbon sequestration, and CH4 emissions can enhance denitrification through DAMO reaction.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Gaoyang Cui, Xiao-Dong Li, Siqi Li, Shiyuan Ding, Qinkai Li, Mengdi Yang, Hong Lv, Yiyao Wang
Summary: This study examines the hydrological conditions due to dam construction and their control on nitrogen transformation processes in a subtropical eutrophic reservoir in Southwest China. The research reveals that denitrification is the most important process in the reservoir, with higher intensity associated with increased relative water column stability in summer and lower stability favoring nitrification in winter. Dissolved oxygen and nitrate concentrations have significant impacts on denitrification rate. The study also highlights the importance of spatiotemporal variations in relative water column stability for regulating nitrogen transformation processes in reservoirs.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2022)
Article
Environmental Sciences
Naomi Geeraert, Anand Archana, Min Nina Xu, Shuh-Ji Kao, David M. Baker, Benoit Thibodeau
Summary: This study found that nitrogen distribution around Hong Kong is influenced by the Pearl River, with two distinct regimes characterized by nitrate dominance and dissolved organic nitrogen dominance. The impact of nitrate originating from the Pearl River on local hypoxia generation in Hong Kong may be less significant than previously thought, while the oxidation of locally released ammonium might play a bigger role than initially believed.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
L. W. Herren, R. A. Brewton, L. E. Wilking, M. E. Tarnowski, M. A. Vogel, B. E. Lapointe
Summary: Effluent from septic systems can lead to eutrophication in the highly urbanized central Indian River Lagoon (CIRL) by contributing nutrient pollution to surface water via groundwater. This study highlights the need to reduce reliance on septic systems in urbanized coastal communities to improve water quality and mitigate harmful algal blooms.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Hengchen Wei, Xin Xu, Allan E. Jones, Amber K. Hardison, Kevan B. Moffett, James W. McClelland
Summary: This study sheds light on the role of tidal freshwater zones (TFZs) in modifying the timing and forms of nitrogen (N) inputs to estuaries. The research found that median concentrations of dissolved inorganic N (DIN) were lower in TFZs compared to upstream non-tidal river reaches, and exhibited spatial gradients. The forms of N also changed within TFZs, with DIN transforming into organic N. Comparisons of discharge and N flux in the Aransas River TFZ showed that tidal patterns influenced the timing of N export, with export exceeding input in winter and being relatively balanced in summer.
ESTUARIES AND COASTS
(2022)
Article
Environmental Sciences
Josefin E. Nilsson, Stefan E. B. Weisner, Antonia Liess
Summary: Wetlands in agricultural areas play a crucial role in mitigating eutrophication by intercepting nutrient transports. This study finds that despite the expected decrease in hydraulic loading rate and nitrogen load during summer, wetlands can still effectively remove nitrogen from agricultural runoff in the future. The design and location of wetlands are important factors for achieving high nitrogen removal efficiency.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Maria Pia Gervasio, Elisa Soana, Tommaso Granata, Daniela Colombo, Giuseppe Castaldelli
Summary: This study investigated the nitrogen load in the Po River watershed in Northern Italy over the past three decades and its relationship with water temperature trends. The results showed a significant reduction in total nitrogen load, mainly nitrate, in the river, which is attributed to the increasing water temperature. The study suggests that climate change may have negative feedback on eutrophication, contributing to the reduction of nitrogen export.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Engineering, Environmental
Chunmei Chen, Christof Meile, Jared Wilmoth, Diego Barcellos, Aaron Thompson
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2018)
Article
Chemistry, Multidisciplinary
Xiangcheng Yuan, Wei-Jun Cai, Christof Meile, Brian M. Hopkinson, Qian Ding, Verena Schoepf, Mark E. Warner, Kenneth D. Hoadley, Bingzhang Chen, Sheng Liu, Hui Huang, Ying Ye, Andrea G. Grottoli
Article
Microbiology
Xiaojia He, Grayson Chadwick, Christopher Kempes, Yimeng Shi, Shawn McGlynn, Victoria Orphan, Christof Meile
ENVIRONMENTAL MICROBIOLOGY
(2019)
Article
Multidisciplinary Sciences
David Miklesh, Christof Meile
Article
Marine & Freshwater Biology
Richard N. Peterson, Christof Meile, Leigha E. Peterson, Matthew Carter, David Miklesh
ESTUARINE COASTAL AND SHELF SCIENCE
(2019)
Article
Geochemistry & Geophysics
Christof Meile, Timothy D. Scheibe
Article
Environmental Sciences
Heewon Jung, Christof Meile
JOURNAL OF CONTAMINANT HYDROLOGY
(2019)
Article
Geochemistry & Geophysics
Jurjen Rooze, Leigha Peterson, Richard N. Peterson, Christof Meile
Article
Multidisciplinary Sciences
Longhui Deng, Damian Boelsterli, Erik Kristensen, Christof Meile, Chih-Chieh Su, Stefano Michele Bernasconi, Marit-Solveig Seidenkrantz, Clemens Glombitza, Lorenzo Lagostina, Xingguo Han, Bo Barker Jorgensen, Hans Roy, Mark Alexander Lever
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Article
Multidisciplinary Sciences
Heewon Jung, Christof D. Meile
Article
Geochemistry & Geophysics
Mark Zindorf, Jurjen Rooze, Christof Meile, Christian Marz, Gwenael Jouet, Robert Newton, Christophe Brandily, Lucie Pastor
Summary: The study reveals that changes in sedimentation rates on the Mozambique margin affect the formation of minerals like pyrite, controlled by sediment accumulation and organic matter deposition. Reconstruction of past sulfate-methane transition zone depth shows that sediment changes impact organic matter oxidation and pyrite formation, with effects occurring over thousands of years.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Marine & Freshwater Biology
Anna L. Tansik, Brian M. Hopkinson, Christof Meile
Summary: Research into coral's carbon processing systems has been motivated by the recognition that ocean acidification alters calcification rates and photosynthetic processes. A multi-compartment coral model incorporating recent measurements of carbonic anhydrase activity and dissolved inorganic carbon parameters showed increased net photosynthesis and modest decreases in calcification under OA conditions. The model suggested that the increase in photosynthesis was due to higher diffusive influx of CO2 into the oral tissue layers, while decreases in calcification were attributed to increased CO2 fluxes into the calcifying fluid, lowering pH and reducing aragonite saturation state. Additional empirical constraints on DIC fluxes associated with calcification and coelenteron transport are needed to improve the model.
Article
Geosciences, Multidisciplinary
Heewon Jung, Hyun-Seob Song, Christof Meile
Summary: We propose a modeling framework that integrates bio(geo)chemical and physical processes, and incorporates genome-scale microbial metabolic information into a dynamically changing, spatially explicit representation of environmental conditions.
GEOSCIENTIFIC MODEL DEVELOPMENT
(2023)
Article
Multidisciplinary Sciences
Longhui Deng, Christof Meile, Annika Fiskal, Damian Boelsterli, Xingguo Han, Niroshan Gajendra, Nathalie Dubois, Stefano M. Bernasconi, Mark A. Lever
Summary: Intertidal sands, influenced by hydrodynamics and macrofaunal activity, are important hotspots for carbon cycling. The study reveals that hydrodynamic forcing controls organismal assemblages in surface sediments, while macrofaunal activity plays a key role in shaping the structure and functioning of bacterial and eukaryotic communities in deeper layers.
Article
Soil Science
Diego Barcellos, Christine S. O'Connell, Whendee Silver, Christof Meile, Aaron Thompson
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.
