Article
Environmental Sciences
Gislayne A. Oliveira, Gustavo S. Colares, Carlos A. Lutterbeck, Naira Dell'Osbel, Enio L. Machado, Lucia R. Rodrigues
Summary: Floating treatment wetlands (FTW) are efficient and easy to install technologies for the treatment of domestic wastewater, offering advantages such as low cost, nutrient removal and reduced maintenance and energy consumption compared to conventional centralized treatment. Further research is needed on the operation, cost assessment and reuse of FTW in decentralized systems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Weixiang Chao, Shanshan Pi, Yang Yang, Zhida Li, Yongjie Yu, Ying Yang, Ruijie Yang, Haiyan Li, Lu Lu
Summary: Water scarcity in arid areas can be alleviated by exploiting unconventional water resources like domestic wastewater (DWW). A solar-driven interfacial evaporation system, using a solar-absorber made of b-TiO2-DW, shows promise for direct potable reuse (DPR) from DWW. The system achieves high efficiency in desalination and evaporation, with potential to meet the daily drinking water needs of 2-3 people in undeveloped areas with limited infrastructure.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jinlong Wang, Xiaobin Tang, Yuyao Liu, Binghan Xie, Guibai Li, Heng Liang
Summary: The coupling of vermifiltration (VF) and self-sustained ultrafiltration (SUF) in this study achieved effective removal of dissolved pollutants and various microorganisms, while also improving membrane flux to ensure water safety. The synergistic effects among the modified biofouling layer structure, reduction of extracellular polymeric substances, and increase of inorganics contents contributed to the improved membrane flux, with further enhancement observed with the usage of reflux.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Engineering, Chemical
J. Yang, M. Monnot, T. Eljaddi, L. Ercolei, L. Simonian, P. Moulin
Summary: The study evaluated the feasibility and sustainability of ultrafiltration (UF) technology for municipal wastewater reuse, finding optimized filtration conditions and showcasing the excellent performance of air backwash in membrane fouling control. The UF system demonstrated sustainable and adaptable filtration performance regardless of temperature and feed water quality, meeting reuse guidelines and standards for agricultural irrigation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Mourin Jarin, Zeou Dou, Haiping Gao, Yongsheng Chen, Xing Xie
Summary: The salinity exchange process involves transferring salts from seawater or brackish water to treated wastewater to produce desalinated water for drinking purposes. This method has been successfully demonstrated using electrodialysis, showing promising results in laboratory-scale systems with low energy consumption. Further evaluation is needed for implementing this technology on a larger scale using real water.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Saeid Ghafoori, Hossein Hassanpour Darvishi, Hossein Mohamadvali Samani, Pezhman Taherei Ghazvinei
Summary: The reuse of treated wastewater is seen as an attractive option for countries and regions facing water scarcity, and the study focuses on designing a wastewater reuse and recycling system in a new campus city. The innovative aspects of the research include unique applied dimensions and the application of the Geo-land method in wastewater recycling as part of the design theory. Analyzing the decentralized reuse of wastewater in urban areas reveals that significant residential areas fall under the first high priority group, providing valuable insights for urban planners in establishing comprehensive plans.
Article
Environmental Sciences
Jian Zang, Manish Kumar, David Werner
Summary: This study examined an innovative decentralized water system in use at a higher education institution in India, which integrates rainwater harvesting and wastewater reclamation technologies. The research found that utilizing reclaimed wastewater and rainwater collection can save water resources for the campus and provide significant optimization opportunities in water management.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Chemical
Marek Gryta, Piotr Wozniak
Summary: This study investigated the application of microfiltration polypropylene (PP) membranes and polytetrafluoroethylene (PTFE) membranes for treating carwash wastewater. The fouling phenomenon limited the effectiveness of the process, but the PP membranes were able to effectively remove turbidity and Escherichia coli from the wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Emily W. Tow, Behzad Rad, Robert Kostecki
Summary: This study investigates the behavior of biofouling on water reuse membranes using confocal microscopy. Through in situ monitoring and image analysis, the growth and removal processes of biofilms and the production of extracellular polymeric substances are revealed. The results provide important insights for the development of improved techniques for biofouling mitigation.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Environmental Sciences
Caixia Liu, Fulai Liu, Mathias N. Andersen, Gongming Wang, Kun Wu, Quanlin Zhao, Zhengfang Ye
Summary: This study conducted a column experiment to simulate the infiltration process of wastewater in desert soil and evaluated its effects on soil, drainage, and plant properties. The results showed that wastewater significantly improved plant growth, but improper treatment of wastewater could lead to contamination of soil and groundwater.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Engineering, Environmental
Zehra Betul Ocal, Ahmet Karagunduz, Bulent Keskinler, Nadir Dizge, Huthaifa I. Ashqar
Summary: This study investigates the reuse potential of an organized industrial zone wastewater using membrane processes. The appropriate membrane types and rejection performance were determined for various pollutant parameters. The results show that BW30 and X20 membranes can comfortably operate with high water recovery rates for wastewater with different sulfate concentrations.
Article
Engineering, Chemical
Fariba Oulad, Sirus Zinadini, Ali Akbar Zinatizadeh, Ali Ashraf Derakhshan
Summary: High-performance nanofiltration membranes were synthesized using a diazotization route, showing enhanced permeability and antifouling capability. The membranes exhibited higher output permeated flux with increased driving force and cross-flow velocity, but decreased flux with higher foulant feed concentration. Chemical stability tests revealed great resistance of the modified membranes to harsh acidic and alkaline conditions, showing potential for practical applications in water treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Construction & Building Technology
Muhammad Farhan Arooj, Fahad Haseeb, Akbar Imran Butt, Muhammad Irfan-Ul-Hassan, Hania Batool, Saad Kibria, Zara Javed, Hassan Nawaz, Sarah Asif
Summary: This research evaluates the effectiveness of treated domestic wastewater in producing plain cement concrete, showing that treated wastewater can be used as an alternative water source for concrete production, with the potential role of admixtures to enhance the strength properties of concrete.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Environmental Sciences
Lydia Teel, Adam Olivieri, Richard Danielson, Blaga Delic, Brian Pecson, James Crook, Krishna Pagilla
Summary: The Nevada Administrative Code requires specific log reduction values for enteric viruses, Giardia cysts, and Cryptosporidium oocysts in reclaimed water intended for indirect potable reuse. Study results show that secondary effluent produced by two water reclamation facilities in Nevada consistently meets or exceeds regulatory requirements and industry standards.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Hanna Kyllonen, Juha Heikkinen, Javier Ceras, Claudio Fernandez, Olaf Porc, Antti Gronroos
Summary: Efforts to reuse reclaimed processing wastewater in the food industry have led to the development of a membrane-based water reuse concept for wastewater from the candy industry. The study focused on the pre-treatment stage to reduce fouling and found that cross-rotational ultrafiltration was effective in removing challenging substances. Conventional filtration technologies were impractical due to a low flux, but spiral wound reverse osmosis functioned well when the wastewater was pre-treated, producing good quality water with the exception of chemical oxygen demand rejection.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Public, Environmental & Occupational Health
Christine Marie George, Lucien Bisimwa Cirhuza, Alves Birindwa, Camille Williams, Sara Beck, Timothy Julian, Jennifer Kuhl, Nicole Coglianese, Elizabeth Thomas, Sarah Bauler, Ruthly Francois, Ronald Saxton, Amani Sanvura Presence, Jean Claude Bisimwa Rusanga, Jamie Perin, Patrick Mirindi
Summary: The cohort study of the REDUCE program in rural DRC found that child hand contamination is associated with diarrhoeal disease, and there is high faecal contamination in child play spaces and food, demonstrating the urgent need for clean play spaces and hand hygiene interventions for young children.
TROPICAL MEDICINE & INTERNATIONAL HEALTH
(2021)
Article
Environmental Sciences
Warish Ahmed, Ben Tscharke, Paul M. Bertsch, Kyle Bibby, Aaron Bivins, Phil Choi, Leah Clarke, Jason Dwyer, Janette Edson, Thi Minh Hong Nguyen, Jake W. O'Brien, Stuart L. Simpson, Paul Sherman, Kevin Thomas, Rory Verhagen, Julian Zaugg, Jochen F. Mueller
Summary: Detection of SARS-CoV-2 RNA in wastewater can serve as an early warning system to identify viral hotspots and target localized public health responses. This method provides unique information on asymptomatic and pre-symptomatic cases that may not be captured by clinical testing, showing potential for effective disease surveillance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Sara E. Beck, Poonyanooch Suwan, Thusitha Rathnayeke, Thi Minh Hong Nguyen, Victor A. Huanambal-Sovero, Boonmee Boonyapalanant, Natalie M. Hull, Thammarat Koottatep
Summary: The study utilized a decentralized wastewater treatment system incorporating WFMF membrane pretreatment for UV disinfection, effectively removing pollutants and microorganisms. The results demonstrated that wastewater treated with UV disinfection met WHO standards, suitable for unrestricted irrigation.
Article
Public, Environmental & Occupational Health
Christine Marie George, Alves Birindwa, Sara Beck, Timothy Julian, Jennifer Kuhl, Camille Williams, Nicole Coglianese, Elizabeth Thomas, Sarah Bauler, Ruthly Francois, Angela Ng, Amani Sanvura Presence, Bisimwa Rusanga Jean Claude, Fahmida Tofail, Jamie Perin, Patrick Mirindi, Lucien Bisimwa Cirhuza
Summary: A study conducted in rural areas of the Democratic Republic of the Congo found an association between the presence of Escherichia coli in soil, children's hands, and stored drinking water and lower developmental outcome scores in children. These results highlight the importance of reducing fecal contamination in the household environment to protect children's cognitive development.
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
(2022)
Article
Environmental Sciences
Hoang Nhat Phong Vo, Thi Minh Hong Nguyen, Huu Hao Ngo, Wenshan Guo, Pradeep Shukla
Summary: The widespread use of PFASs-related products has led to increasing contamination of groundwater. This study found that biochar column can effectively sorb PFASs in groundwater, with dissolved organic matter playing a key role in the sorption process.
Article
Engineering, Environmental
Shervin Kabiri, William Tucker, Divina A. Navarro, Jennifer Braunig, Kristie Thompson, Emma R. Knight, Thi Minh Hong Nguyen, Charles Grimison, Craig M. Barnes, Christopher P. Higgins, Jochen F. Mueller, Rai S. Kookana, Michael J. McLaughlin
Summary: This study evaluated the leaching and desorption of PFAS from contaminated soils using three different leaching tests, and found that PFAS chemical structure and pH of soil play a significant role in PFAS leaching. Additionally, no single soil property adequately described PFAS leaching behavior, highlighting the complexity of this environmental issue.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Thi Minh Hong Nguyen, Jennifer Braunig, Rai S. Kookana, Sarit L. Kaserzon, Emma R. Knight, Hoang Nhat Phong Vo, Shervin Kabiri, Divina A. Navarro, Charles Grimison, Nicole Riddell, Christopher P. Higgins, Michael J. McLaughlin, Jochen F. Mueller
Summary: This study investigated the mobilization of PFASs in water-saturated soils using column experiments and assessed the feasibility of their remediation by soil desorption and washing. The results showed that shorter-carbon-chain PFASs can be readily removed by soil washing technologies, while longer-chain PFASs exhibit nonequilibrium sorption/desorption. The increasing contribution of hydrophobic interactions is suggested as the main driving factor of the nonequilibrium processes.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Phong H. N. Vo, Thomas Buckley, Xiaoyong Xu, Thi Minh Hong Nguyen, Victor Rudolph, Pradeep Shukla
Summary: Foam fractionation is an effective method to recover PFASs from aqueous sources, using the sorption of PFASs to the air-water interface of bubbles. The choice of cosurfactant plays a critical role in the effectiveness of foam fractionation. This study evaluates the effectiveness of four cosurfactants with different-charged headgroups and estimates the air-water interfacial partitioning of PFASs in the presence of these cosurfactants.
Article
Environmental Sciences
Phong H. N. Vo, Ben Tscharke, Sonja Toft, Craig Madsen, Kim Qui Nguyen, Hong T. M. Nguyen, Xuan Thanh Bui, Jiaying Li, Phong K. Thai
Summary: This study investigates the spatiotemporal trends and impact of COVID-19 lockdowns on the physiochemical parameters in the influent of wastewater treatment plants (WWTPs) around Brisbane, Australia. The study reveals that industrial and commercial land use, as well as population size, have a significant impact on parameter loads and profiles. Additionally, the COVID-19 lockdown had varying effects on different catchments, which may be attributed to the characteristics of the catchments.
Article
Environmental Sciences
Paul Onkundi Nyangaresi, Thusitha Rathnayake, Sara E. Beck
Summary: Ultraviolet light-emitting diodes (UV LEDs) have the ability to inactivate microorganisms and viruses in water. The combination of UV-C, UV-B, and UV-A wavelengths in different ways allows for polychromatic irradiation. Previous studies have shown no synergy from simultaneous or sequential UV-C and UV-B irradiation, but there is synergy between UV-A followed by UV-C or UV-B irradiation. This study evaluated the disinfection efficacy of single UV-C and UV-A followed by UV-C LED irradiation on Escherichia coli, Bacillus spizizenii spores, and MS2 bacteriophage in water. The results showed that single 267 nm UV-C LED had higher inactivation efficacy, while single 278 nm UV-C LED had higher efficacy in terms of repair suppression and electrical energy consumption. Using single UV-C LEDs in water disinfection systems can reduce costs and achieve better levels of microorganism inactivation, repair suppression, and electrical energy consumption.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Hong T. M. Nguyen, Sandra Nilsson, Ava A. R. Mueller, Leisa-Maree Toms, Carl Kennedy, Daman Langguth, Peter Hobson, Jochen F. Mueller
Summary: Human biomonitoring programs have been conducted worldwide to assess the exposure and health risks of per- and polyfluoroalkyl substances (PFAS). This study provided the first evidence of PFAS exposure in the population of Papua New Guinea, a unique region both socioeconomically and geographically. The detected PFAS concentrations were lower than those in serum pools obtained from Australia, but the presence of 9Cl-F53B in all pools suggests exposure from local industrial sources.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Charles Grimison, Emma R. Knight, Thi Minh Hong Nguyen, Nathan Nagle, Shervin Kabiri, Jennifer Braunig, Divina A. Navarro, Rai S. Kookana, Christopher P. Higgins, Michael J. McLaughlin, Jochen F. Mueller
Summary: This study aimed to evaluate the performance of a soil washing plant (SWP) inremediating a PFASs-contaminated soil with high clay content. The SWP utilized physical and chemical processes to fractionate soil particles and remove PFASs. The contaminated water was treated with GAC and ion-exchange resin for reuse within the SWP. The SWP achieved high removal efficiencies (97.1% for perfluorocarboxylic acids and 94.9% for perfluorosulfonic acids) and demonstrated effective transfer of PFAS mass to the wash solution and GAC.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Phong H. N. Vo, Brett R. Hamilton, Roger A. Wepf, Trent A. Key, Thi Minh Hong Nguyen, Phong K. Thai, Kevin Thomas, Jochen F. Mueller
Summary: This study used DESI MSI to analyze the vertical distribution of PFAS in a concrete core from an AFFF-impacted FTG, and the results were consistent with the conventional method of core sidewall drilling. DESI MSI can provide detailed mass distribution at a higher resolution.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Engineering, Environmental
Svetlana Popova, Irina Tsenter, Natalia Garkusheva, Sara E. Beck, Galina Matafonova, Valeriy Batoev
Summary: The study demonstrates that the combination of high-frequency ultrasound with a photo-Fenton-like process using persulfate and UV LEDs is effective in removing organic micropollutants and bacteria simultaneously in water. The process showed the highest degradation rates for BPA in deionized water and efficient inactivation of E. coli and E. faecalis. In natural water, the co-existence of micropollutants accelerated the inactivation of E. coli, while the addition of bacteria inhibited the degradation process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
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.