Article
Engineering, Marine
Yixuan Cheng, Ning Zhao, Kaidi Zhang, Wei Wei
Summary: Air bubble curtain anti-fouling systems have unique advantages in environmental dredging technology, preventing the diffusion of suspended pollutants by blocking material exchange in water. The protection efficiency of the bubble curtain depends on the fusion of bubble flow and the stability of the plume. Feasibility assessment of the bubble curtain in field engineering demonstrates practicality in dredging operations.
Article
Biochemistry & Molecular Biology
Siti Nur Alwani Shafie, Wong Yoong Shen, Jc Jcy Jaymon, Nik Abdul Hadi Md Nordin, Abdelslam Elsir Elsiddig Mohamednour, Muhammad Roil Bilad, Lam Man Kee, Takeshi Matsuura, Mohd Hafiz Dzarfan Othman, Juhana Jaafar, Ahmad Fauzi Ismail
Summary: In this study, a commercial PTFE membrane was coated with a thin layer of PEBAX to improve hydrophilicity and investigate bubble formation. The PEBAX coating reduced the pore size and increased the hydrophilicity of the membrane. The presence of PEBAX also increased the frequency of bubble formation and the gas-liquid contact area, and promoted the growth of C. vulgaris.
Article
Limnology
Nader Nakhaei, Josef D. Ackerman, Damien Bouffard, Yerubandi R. Rao, Leon Boegman
Summary: This study develops an empirical model for estimating hypolimnion thickness and sediment oxygen demand (SOD) and hypolimnetic oxygen demand (HOD) values based on dissolved oxygen (DO) and water temperature data from lakes. The model is validated and shows that SOD and HOD are significant drivers of DO depletion in lakes during summer. The study highlights the importance of physical characteristics in the hypolimnetic DO budget and provides insight into the relative impact of physical transport versus biogeochemical sources and sinks in the DO budget.
Article
Environmental Sciences
J. C. Toledo, V. L. Singleton, J. C. Little, G. A. Lawrence, C. L. Ramon, F. J. Rueda
Summary: Research indicates that bubble-plume diffusers introduce mixing energy and subtle changes in water quality and thermal structure in lakes and reservoirs, necessitating consideration of the complex interaction between plumes and reservoirs. Wind-driven internal seiches are found to be the primary driver of internal circulation in reservoirs, with oxygen exchange controlled by internal-seiche driven transport through basin constrictions and plume-induced circulation.
WATER RESOURCES RESEARCH
(2021)
Article
Geochemistry & Geophysics
Sushma Prasad, Praveen K. Mishra, P. Priya, A. R. Yousuf, Nils Andersen, A. Anoop, Arshid Jehangir, Tabasum Yaseen, Birgit Gaye, Martina Stebich
Summary: This study analyzes the precipitation pathways and moisture sources during extreme precipitation years in the NW Himalaya region and examines the impact of climate extremes on lacustrine systems. The results show the significant changes in precipitation pathways during summer and the role of mid tropospheric level moisture availability in creating extreme wet conditions. The study also highlights the sensitivity of lake systems to short-term climate variability and the changes in hydrochemistry due to groundwater inflow. Overall, the study provides insights into changes in moisture pathways and sources during extreme events and their impact on lacustrine systems.
APPLIED GEOCHEMISTRY
(2022)
Article
Engineering, Chemical
Vishnu Teja Mantripragada, Srikrishna Sahu, Sabita Sarkar
Summary: The morphological and hydrodynamic behavior of bubbles in air-water plumes was studied using Particle Tracking Velocimetry (PTV) techniques. A novel correlation for estimating bubble aspect ratio based on bubble Reynolds number and Eotvos number was proposed and compared with existing correlations.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Engineering, Chemical
Arsalan Behzadipour, Amir H. Azimi, Iran E. Lima Neto
Summary: A series of laboratory experiments were conducted to improve the entrainment and mixing capacity of vertically discharged bubble plumes by using a grid-screen. The size and distance of the grid-screen were found to affect the velocity, concentration, and size of the bubbles.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Ecology
Jouni Lehtoranta, Jorgen Bendtsen, Christer Lannergren, Erkki Saarijarvi, Magnus Lindstrom, Heikki Pitkanen
Summary: This study investigates the effects of pumping surface water down through the pycnocline on various factors in coastal basins. The results show that ventilation can improve hydrodynamics, oxygen concentrations, hydrogen sulfide, and nutrient levels in the basins. However, the effectiveness of ventilation depends on the salinity stratification and temperature stratification in the basins.
ECOLOGICAL ENGINEERING
(2022)
Article
Engineering, Chemical
David Laupsien, Claude Le Men, Arnaud Cockx, Alain Line
Summary: This paper presents a comprehensive databank of bubble plume hydrodynamics in various media with different viscosities. The influence of viscosity on bubble plume oscillations and velocity fields in both liquid and gas phases is studied. The bubble size distribution at different viscosities is also analyzed using two different spargers. The results show that liquid phase hydrodynamics are weakly affected by the choice of sparger, while viscosity has a significant impact on bubble plume hydrodynamics.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Engineering, Chemical
Arsalan Behzadipour, Amir H. Azimi, Iran E. Lima Neto
Summary: Vertically discharged bubble plumes have various applications and their characteristics are affected by air discharge. A series of laboratory experiments were conducted to study the effects of air discharge on bubble dynamics. The results showed that bubble characteristics varied with distance from the nozzle and all parameters gradually decreased afterwards. The increase in air discharge resulted in an increase in bubble diameter, bubble frequency, and turbulent intensity. (c) 2022 Elsevier Ltd. All rights reserved.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Environmental Sciences
Chen Lan, Yongxue Ji, Jingfu Wang, Haiquan Yang
Summary: The study focused on the Aha Reservoir in Southwest China, where the use of bubble plume diffusers significantly improved water quality by reducing phosphorus and nitrogen concentrations. The application of this technique also had a significant impact on the evolution of algal phytoplankton in the reservoir.
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
(2021)
Article
Mechanics
Huijie Wu, Binbin Wang, Steven F. DiMarco, Lei Tan
Summary: An experimental investigation of turbulence in bubble plumes shows that bubble size and population significantly influence turbulent statistics and budget terms in the equations of turbulent kinetic energy. Different growth behaviors of bubble plumes under different combinations of sizes and population affect turbulent velocity correlations and vertical-to-horizontal anisotropy of velocity fluctuations. The study highlights the importance of bubble characteristics in shaping the radial profiles of turbulent stresses and transport terms in bubble plumes.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Environmental Sciences
J. J. Montes-Perez, R. Marce, B. Obrador, T. Conejo-Orosa, J. L. Diez, C. Escot, I Reyes, E. Moreno-Ostos
Summary: Global change is altering the thermal regime of water bodies, affecting the carbon cycling in reservoirs. This study investigated the effects of hydrological conditions on the production of dissolved inorganic carbon (DIC) in the hypolimnion of a Mediterranean reservoir. The results showed that lower water column thermal stability in wet years led to lower DIC accumulation, while longer stratification in dry years promoted higher DIC accumulation. Aerobic respiration, denitrification, and metal reduction processes played important roles in DIC production.
Article
Engineering, Chemical
Shuli Shu, Ning Yang, Francois Bertrand, Jamal Chaouki
Summary: This study uses GPU-accelerated fine-grid simulation with an unsteady k-epsilon model to predict bubble plumes in 3D bubble column reactors without considering the influence of lift force. The research highlights the effectiveness of this approach in capturing the bubble plumes in 3D systems.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Geochemistry & Geophysics
Edward J. Matheson, Peir K. Pufahl, Alexandre Voinot, J. Brendan Murphy, Danielle M. Fitzgerald
Summary: This study provides evidence supporting the ferruginous upwelling model through geochemical analysis of Paleozoic ironstones. The results show that ironstone primarily formed from unmixed marine fluids, including components from mid-ocean ridge hydrothermal waters. The study also suggests that oxygen deficiency in the deep oceans was necessary for the formation of iron-enriched ironstone, and the redox conditions in the Paleozoic oceans were dynamically changing.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Public, Environmental & Occupational Health
Antti Joonas Koivisto, Michael Jayjock, Kaarle J. Hameri, Markku Kulmala, Patrick Van Sprang, Mingzhou Yu, Brandon E. Boor, Tareq Hussein, Ismo K. Koponen, Jakob Londahl, Lidia Morawska, John C. Little, Susan Arnold
Summary: STOFFENMANAGER (R) and the Advanced REACH Tool (ART) are widely accepted tools for regulatory chemical safety assessment. They are based on a modified multiplicative model, with exposure base levels and exposure modifying factors replaced by different quantities. The models provide qualitative outputs and have shown weak correlation with measured exposure levels, suggesting limitations in their accuracy and performance.
ANNALS OF WORK EXPOSURES AND HEALTH
(2022)
Article
Public, Environmental & Occupational Health
Elaine A. Cohen Hubal, Nicole M. DeLuca, Ashley Mullikin, Rachel Slover, John C. Little, David M. Reif
Summary: This study demonstrates the application of systems science principles in synthesizing holistic insights for decision making using publicly available data and computational tools, focusing on children's environmental health. By studying collective, system-wide interactions, it provides insights into the factors contributing to regional vulnerabilities and interventions that better address complex real-world conditions.
Review
Construction & Building Technology
Wenjuan Wei, John C. Little, Olivier Ramalho, Corinne Mandin
Summary: Chemicals in household cleaning and personal care products can be released into indoor air during and after use, leading to human exposure. In this study, emission models for these products were reviewed, including evaporation, convective mass transfer, and diffusion models.
BUILDING AND ENVIRONMENT
(2022)
Review
Environmental Sciences
Clara M. A. Eichler, Chenyang Bi, Chunyi Wang, John C. Little
Summary: This study identifies high-priority phthalates, phthalate alternatives, and PFAS and explores the availability of model parameters for existing indoor SVOC emission and partitioning models. The results indicate the need for further experimental and modeling work to fully understand the behavior of SVOCs indoors and to predict exposures with more confidence. The study proposes modeling approaches to fill the knowledge gaps and guide future research.
JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY
(2022)
Article
Limnology
James M. Rand, Mirjam O. Nanko, Mikkel B. Lykkegaard, Danielle Wain, Whitney King, Lee D. Bryant, Alan Hunter
Summary: This analysis demonstrates that manual lake sampling is more likely to occur in fair weather conditions, leading to biased water quality measurements compared to automated monitoring. The study reveals higher water temperatures, higher chlorophyll, and lower dissolved oxygen in manually collected samples, which can be attributed to the weather-induced sampling bias. The findings emphasize the importance of considering and correcting for this bias in climate models and other applications that rely on manually collected water quality data.
LIMNOLOGY AND OCEANOGRAPHY-METHODS
(2022)
Article
Green & Sustainable Science & Technology
Maria Amaya, Faye Duchin, Erich Hester, John C. Little
Summary: Economic input-output and watershed models provide valuable insights, but their integration is often limited due to the use of different spatial units. A modular hydrologic-economic modeling framework is designed to address this issue and evaluate the impact of future development prospects on watershed health in Fauquier County.
Article
Environmental Sciences
E. Slavin, D. J. Wain, L. D. Bryant, M. Amani, R. G. Perkins, C. Blenkinsopp, S. Simoncelli, S. Hurley
Summary: Top-down surface mixers are effective in preventing stratification, controlling cyanobacteria, and limiting sediment release of soluble manganese in drinking water reservoirs. However, their limited range of influence leaves a majority of the reservoir exposed to potential issues such as stratification, anoxia, and internal loading of inorganic nutrients and metals.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Wenjuan Wei, John C. Little, Melanie Nicolas, Olivier Ramalho, Corinne Mandin
Summary: The use of liquid products on material surfaces and human skin can result in emissions of chemicals in indoor air. Existing models do not allow for comparison of different scenarios and mechanisms. This study developed a mechanistic model based on mass transfer theories to characterize emissions from liquid products into the air. The model was validated using data on chemical emissions and a sensitivity analysis was conducted. The percentage of emitted chemical mass varied depending on the surface and the peak gas-phase concentration and emission time depended on the properties of the chemical and the surface.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Review
Construction & Building Technology
Chenyang Bi, John C. Little
Summary: Humanity faces complex and systemic societal challenges, where buildings and cities play a significant role. Reliable methods to assess the resilience and sustainability of buildings and cities are needed. However, existing assessment frameworks have limitations in terms of limited causality among component systems, narrow definitions of sustainability and resilience, inadequate attention to social systems, and poor connections between building and urban scales. To address these limitations, a holistic, multi-scale, system-of-systems approach is proposed.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Review
Engineering, Environmental
Bastian Schnabel, Sam Wright, Rees Miller, Lee D. Bryant, Thomas R. Kjeldsen, Roy Maconachie, Solomon P. Gbanie, Kabba S. Bangura, Anthony J. Kamara
Summary: In 2017, 400 million people in Sub-Saharan Africa (SSA) still relied on unimproved drinking water sources, with 80 million using untreated surface water. The expansion of urban areas in SSA has led to challenges in providing clean drinking water. Constructed wetlands (CWs) with phytoremediation offer a cost-effective and sustainable alternative for wastewater treatment. Certain plant species such as Lemna minor, Ipomoea aquatica, Spirodela polyrhiza, and Brachiaria mutica have shown potential to remove heavy metals from surface water.
Article
Water Resources
Hamid Abdolabadi, Maria Amaya, John C. C. Little
Summary: This paper demonstrates the integration of a hydrologic model and an economic input-output model to explore the trade-off between water use and water availability. The approach provides a framework that connects the supply and demand side, allowing for analysis of water allocation and calculation of water scarcity. Furthermore, it takes into account the spatial distribution of economic activity to prevent under or over estimation of water scarcity.
APPLIED WATER SCIENCE
(2023)
Article
Environmental Sciences
Ming Su, Jiao Fang, Zeyu Jia, Yuliang Su, Yiping Zhu, Bin Wu, John C. Little, Jianwei Yu, Min Yang
Summary: Cyanobacteria can adjust their photosynthetic pigments to sense different light colors. Some filamentous cyanobacteria increase their phycoerythrin (PE) levels in green light, leading to extensive odor problems in drinking water reservoirs. This study found a correlation between MIB biosynthesis and chromatic acclimation (CA) induced by ambient light color in a MIB-producing Pseudanabaena strain. Pseudanabaena regulates pigment proportion through CA3, increasing PE and decreasing phycocyanin (PC) in green light. MIB production and chlorophyll a (Chl a) biosynthesis are positively correlated regardless of light color.
ENVIRONMENTAL RESEARCH
(2023)
Review
Engineering, Environmental
John C. Little, Roope O. Kaaronen, Janne I. Hukkinen, Shuhai Xiao, Tatyana Sharpee, Amro M. Farid, Roshanak Nilchiani, C. Michael Barton
Summary: Humans have drastically altered the Earth, leading to complex and systemic challenges such as climate change, renewable energy, infrastructure adaptation, disasters, pandemics, food insecurity, and biodiversity loss in the Anthropocene era. In this Critical Review, we delve into the history of the Universe and Earth, the evolution of life and human societies, and the interconnectedness of geophysical, biophysical, sociocultural, and sociotechnical systems. We propose an evolutionary, system-of-systems, convergence paradigm to address the intertwined societal challenges of the Anthropocene.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Chunyi Wang, Clara M. A. Eichler, Chenyang Bi, Christiaan J. E. Delmaar, Ying Xu, John C. Little
Summary: Assessing exposure to SVOCs emitted from consumer products and building materials in indoor environments is crucial for reducing health risks. Comparing two chamber designs, it was found that the micro chamber required shorter time to reach steady state and the predicted concentration profiles correlated well with existing measurements, demonstrating the direct applicability of chamber data in exposure assessments.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2023)
Article
Water Resources
Maria Amaya, Faye Duchin, Erich Hester, John C. Little
Summary: This study establishes a hydrologic-economic modeling framework to integrate watershed and economic systems, simulating scenarios at different time units to address questions of interest to economists and hydrologists. By examining seasonal increases in nitrogen concentration in response to agricultural intensification, it is found that implementing conjunctive use in irrigation can reduce nitrogen concentration to specified limits in Cedar Run Watershed. The most efficient strategy for conjunctive use varies depending on the timestep utilized in the scenario, expanding the range of questions that can be addressed beyond individual models linked in this framework.
FRONTIERS IN WATER
(2022)
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.