Article
Environmental Sciences
Ming Liu, Yixin He, Li Cao, Yue Zhi, Xianjin He, Tao Li, Yanyan Wei, Xiaobing Yuan, Bingsheng Liu, Qiang He, Hong Li, Xiaojun Miao
Summary: This study investigates the transformation mechanisms of dissolved inorganic nitrogen (DIN) under hydrodynamic turbulence. Field investigation reveals that NH+4 concentrations are lower in flood seasons compared to drought seasons, while laboratory results demonstrate that limitation of dissolved oxygen (DO) causes inactive nitrification and active denitrification in sediment. Turbulence decreases NH4+ and NO2- concentrations, but increases NO(3 )(-)and total DIN concentrations in the overlying water.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Bowen Li, Jing Paul Liu, Yonggang Jia
Summary: This study compared the hydrodynamic effect and sediment diffusion path at the Yellow River subaqueous delta and the Yangtze River subaqueous delta, and analyzed the causes of accumulation and erosion landform in different types of subaqueous deltas. The research results provide important insights into the understanding of erosion and deposition in subaqueous deltas and support for the protection of ecological and geological environments as well as disaster prevention.
Article
Environmental Sciences
Bowen Li, J. Paul Liu, Yonggang Jia
Summary: This study compares the hydrodynamic effects on sediment transport paths in three different types of subaqueous deltas in the East Asian monsoon area and analyzes the reasons for the distribution of accumulation erosion landforms. The research results provide scientific support for analyzing the impact of river sediment changes on delta types and the protection of the delta ecological environment.
Article
Geosciences, Multidisciplinary
Tian Zhao, Heidi M. Nepf
Summary: Vegetation serves as habitat and natural solutions for coastal flooding and erosion, with restoration efforts requiring an understanding of sediment transport and retention. Laboratory experiments showed that bedload sediment transport rate is dependent on turbulent kinetic energy, rather than stem diameter, highlighting the importance of turbulence in predicting sediment transport.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Mingen Liang, Jing Liu, Yitong Lin, Zixiao He, Wen Wei, Liangwen Jia
Summary: Understanding suspended sediment processes in the mouth-bar region during typhoons is important for estuarine geomorphic prediction. An observation system was used to explore suspended sediment dynamics during Typhoon Higos in the Modaomen Estuary. Results showed that suspended sediment concentrations during typhoons can be 30 times larger than normal conditions, primarily due to sediment resuspension induced by typhoon waves. The dynamics of suspended sediment varied depending on the dominant flows in the mouth-bar region, either being influenced by wind-driven flow and ebb surge transport combined with river flooding or tidal processes.
Article
Environmental Sciences
Miao Wu, Ming Zhang, Wei Ding, Lin Lan, Zhilin Liu, Lingzhan Miao, Jun Hou
Summary: This study found that wind-wave disturbance has little impact on the total carbon metabolism of sediment microbial communities, but significantly affects the microbial utilization ability of specific carbon sources. Certain carbon sources such as amines and carboxylic acids are greatly affected, while resuspension events do not alter the overall carbon metabolism function.
Article
Construction & Building Technology
Jianlin Ren, Mengjia Tang, Atila Novoselac
Summary: This study developed a method to quantify particle deposition and resuspension on clothing and found that activity type, flooring type, and flooring condition significantly affect particle transport. Furthermore, the study found that particles previously loaded on clothing can resuspend and disperse throughout a house during light walking.
BUILDING AND ENVIRONMENT
(2022)
Article
Environmental Sciences
Ying Yu, Zengliang Yu, Jingang Jiang, Lifang Wu, Huiyun Feng
Summary: Based on the study, resuspension is a crucial process for the release of endogenous pollution from shallow lakes. Sediment elution technique can effectively remove fine particle sediment and inhibit the release of ammonium nitrogen and total dissolved phosphorous. Moreover, it alters the microbial community structure and decreases the concentration of nitrogen and phosphorus pollutants in pore water.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Environmental Sciences
Xinran Zhao, Yupeng Zhou, Chenzhe Liang, Jianchen Song, Siyun Yu, Gengxuan Liao, Peiyan Zou, Kuok Ho Daniel Tang, Chenmiao Wu
Summary: This paper systematically presents the prevalence, sources, fate, risks, and mitigations of airborne microplastics through the review of >140 scientific papers. It emphasizes the indoor microplastics and their risks on animals, plants, and humans. Outdoor microplastics are mainly generated by various activities and have been detected worldwide, while indoor microplastics come from wear and tear and have higher concentrations. Airborne microplastics can interact with chemicals, microorganisms, and other particles, and can adversely affect organisms and humans. Indirect and direct mitigations can be achieved through filtration systems and source reduction, regulation, and biodegradable substitutes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Daniel J. Nowacki, Andrew W. Stevens, Renee K. Takesue, Eric E. Grossman
Summary: The sequence and timing of sediment delivery and redistribution in coastal systems is crucial for shoreline stability, ecosystem services, and remediation planning. This study explores the sediment dynamics and the coupling between fluvial and oceanographic processes in Bellingham Bay, an urban estuary in Washington, USA, using multiple time-scale observations. The findings provide important insights for understanding the fate of contaminants, predicting long-term delta morphological evolution, and informing coastal restoration efforts.
ESTUARIES AND COASTS
(2023)
Article
Environmental Sciences
T. Benaltabet, G. Lapid, A. Torfstein
Summary: Trace metals delivered by atmospheric dust play a key role in oceanic biogeochemical cycles. However, the impact of short-term environmental perturbations such as dust storms and sediment resuspension events on the oceanic water column is poorly constrained. This study presents observations from the Gulf of Aqaba over a 2-year period, showing that increasing aerosol loads lead to a decrease in upper mixed layer trace metal inventories. Dust storms and sediment resuspension events promote trace metal scavenging and clearing.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Engineering, Marine
Ryan J. K. Dunn, Jordan Glen, Hsin-Hui Lin, Sasha Zigic
Summary: The study examines the dynamics of suspended particulate matter (SPM) in Port Curtis estuary, Australia, utilizing the LISST instrument. The results show significant spatial and temporal trends in SPM sizes and concentrations, influenced by variable energy conditions on neap and spring tide cycles. Findings highlight the important influence of tidal regimes on SPM dynamics in estuarine environments.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Environmental Sciences
Chao Liu, Yuqi Shan, Heidi Nepf
Summary: Laboratory experiments showed that model vegetation has a significant impact on turbulence and resuspension, with vegetation-generated turbulence dominating within canopies. The critical turbulent kinetic energy and velocity for resuspension initiation were found to be independent of stem diameter.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Ilwon Jeong, Yonguk Ryu, Seung Yun Nam, In-Cheol Lee, Kyunghoi Kim
Summary: This study investigates the physicochemical suppression of calcium on sediment resuspension. The results show that calcium can suppress sediment resuspension by changing sediment properties, enhancing erosion resistance, and decreasing suspended sediment concentrations.
MARINE POLLUTION BULLETIN
(2022)
Article
Biodiversity Conservation
Yuting Li, Zhiyao Song, Ruijie Li, Peng Chen, Xiufeng Quan
Summary: This study aims to propose a new method and model to improve the accuracy of suspended sediment concentration (SSC) in estuarine and coastal waters. The model, based on hydrodynamic factors, functional principles, and dimensional evaluation methods, can analyze the effects of horizontal convective transport and vertical suspended upward movement on SSC.
ECOLOGICAL INDICATORS
(2023)
Article
Computer Science, Interdisciplinary Applications
Brady A. Nahkala, Amy L. Kaleita, Michelle L. Soupir
Summary: Watershed models and machine learning models are both important tools for providing information to decision makers, but watershed models are often neglected due to constraints. Machine learning models, particularly the random forest algorithm, offer interpretable predictive tools that provide decision makers with more intuitive references.
ENVIRONMENTAL MODELLING & SOFTWARE
(2022)
Article
Environmental Sciences
Ji Yeow Law, Leigh Ann Long, Amy Kaleita, Matthew Helmers, Conrad Brendel, Katherine van der Woude, Michelle Soupir
Summary: It is necessary to use combinations of BMPs in the MARB to achieve nutrient reduction goals. Results from a study in paired catchments show that higher coverage of BMPs can effectively reduce nitrate and total nitrogen loads. Precipitation patterns and seasonality also play a role in nitrogen export.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Abby Schaefer, Jaejin Lee, Michelle L. Soupir, Thomas B. Moorman, Adina Howe
Summary: This study used quantitative PCR and sequencing techniques to analyze microbial communities in woodchip bioreactors. The results showed dynamic microbial communities with persistent taxa between different sampling years and hydraulic retention times. The similarities in functional gene copy numbers suggest that the potential for denitrification is conserved across different microbial communities. The study recommends focusing on woodchip bioreactor microbial community membership in future research.
JOURNAL OF ENVIRONMENTAL QUALITY
(2022)
Article
Environmental Sciences
Jared S. Flater, Laura M. Alt, Michelle Soupir, Thomas B. Moorman, Adina Howe
Summary: Poultry litter is a valuable nutrient resource for agriculture but can introduce antibiotic resistance genes and bacteria to the environment. Prairie strips have been shown to improve environmental quality in agricultural systems. This research investigates the potential of prairie strips to reduce the transport of bacteria and resistance genes in runoff after litter application. The results vary, suggesting the need for further understanding of soil properties and other factors.
JOURNAL OF ENVIRONMENTAL QUALITY
(2022)
Article
Environmental Sciences
Ian P. Willard, Chris R. Rehmann
Summary: This study investigates the effect of differential diffusion on salt fingers. The experimental results show that differential diffusion can decrease the initial density ratio, thus enhancing the formation of salt fingers. The mixing efficiency is low and dependent on the initial density ratio.
ENVIRONMENTAL FLUID MECHANICS
(2023)
Article
Environmental Sciences
Andrea R. McEachran, Loulou C. Dickey, Chris R. Rehmann, Thomas M. Isenhart, Tyler A. Groh, Michael A. Perez, Cassandra J. Rutherford
Summary: A three-dimensional groundwater model was developed to assess nitrate removal in a saturated riparian buffer (SRB) in central Iowa. The model showed that groundwater flow was primarily one-dimensional in the buffer and three-dimensional near the distribution pipe and stream. The length of the flow path and depth were found to impact nitrate removal potential.
JOURNAL OF ENVIRONMENTAL QUALITY
(2023)
Article
Engineering, Environmental
Andrew J. Craig, Chris R. Rehmann, Laura M. Alt, Lisa A. Schulte, Michelle L. Soupir
Summary: Vegetative filter strips (VFS) have been proven effective in reducing the downstream transport of agroecosystem contaminants. Prairie strips, a newly developed type of VFS, not only reduce sediment, nitrogen, and phosphorus losses, but also lower the concentration of pathogens.
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2022)
Article
Microbiology
Phil Colgan, Elizabeth L. Rieke, Khurram Nadeem, Thomas B. Moorman, Michelle L. Soupir, Adina Howe, Nicole Ricker
Summary: Evaluating the environmental and clinical impacts of industrial antibiotic use is crucial for preventing the spread of antimicrobial resistance. Using soil columns and a qPCR-based approach, researchers studied the transport and enrichment of resistance genes in soil and water after applying swine or cattle manure. They found differences in resistance gene profiles and distribution between manure sources, as well as different dynamics of gene distribution in soil and effluent water. This information can be used to develop future mitigation strategies.
Article
Environmental Sciences
Jena L. Congilosi, Joshua S. Wallace, Timothy P. Neher, Adina Howe, Michelle L. Soupir, Diana S. Aga
Summary: The application of animal manures to cropland is an important nutrient recycling strategy. This study analyzed the presence of antimicrobials, metals, and antimicrobial resistance genes (ARGs) in swine manure samples from Iowa, United States. The results showed high levels of tetracyclines and other chemicals, indicating the potential risk of antimicrobial resistance development and proliferation.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Ji Yeow Law, Alexis Slade, Natasha Hoover, Gary Feyereisen, Michelle Soupir
Summary: Woodchip denitrification bioreactors are effective in reducing nitrogen export from subsurface drainage, but limited woodchip supplies and rising prices pose challenges. Lab studies suggest corncobs as a promising alternative, giving higher removal rates and cost efficiency. This field study compares the performance and cost of denitrification bioreactors using woodchip-corncob treatments, finding CC75 to be the most cost-efficient treatment. However, further studies are needed to explore long-term opportunities and challenges of using corncobs as a bioreactor medium.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Lindsey M. Hartfiel, Natasha L. Hoover, Steven J. Hall, Thomas M. Isenhart, Carmen L. Gomes, Michelle L. Soupir
Summary: Denitrification bioreactors are effective in reducing nitrate from subsurface drainage, but they may also produce other pollutants and greenhouse gases. A woodchip bioreactor system showed near complete removal of nitrate in both chambers during the first two years of monitoring. In the third year, significant nitrate reduction was observed in chamber A, alongside production of dissolved methane and nitrous oxide in both chambers. The overall impact on the landscape-scale was small, but pollution swapping can be reduced in woodchip bioreactors under low-flow conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Mechanical
Lauren E. Schwab, Chris R. Rehmann
Summary: A new method for estimating turbulent kinetic energy (TKE) from acoustic Doppler current profiler (ADCP) measurements is proposed, which reduces the errors compared to previous methods. By considering the geometric orientation of ADCP sampling beams and the relative contributions of root mean square (RMS) velocities, the method can be applied to any type of ADCP.
FLOW MEASUREMENT AND INSTRUMENTATION
(2023)
Article
Agronomy
Brady A. Nahkala, Amy L. Kaleita, Michelle L. Soupir, Andy VanLoocke
Summary: The Prairie Pothole Management Support Tool (PPMST) is an open-source web application that provides educational and informational evaluations of flood risk in farmed prairie potholes. It uses a predictive model and simple field characteristics to offer a comparative numeric assessment and assist landowners and consultants in selecting suitable tillage and drainage options.
AGROSYSTEMS GEOSCIENCES & ENVIRONMENT
(2022)
Article
Agronomy
Alyssa N. Iverson, Thomas B. Moorman, Michelle L. Soupir, Amy J. Morrow
Summary: The livestock industry in the United States heavily relies on antibiotics for disease prevention and treatment, leading to frequent application of antibiotic-laden manure in farmland. This study found that prairie buffer strips in farmland do not consistently enhance antibiotic degradation, but antibiotics are unlikely to persist in soil under strip or crop management.
AGROSYSTEMS GEOSCIENCES & ENVIRONMENT
(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.
