Article
Environmental Sciences
Hongyu Ji, Shenliang Chen, Chao Jiang, Yaoshen Fan, Yutao Fu, Peng Li, Fucheng Liu
Summary: River dynamics and sediment budget have a significant impact on the geomorphic variability of river channels and deltaic environments. This study analyzes the effects of dam construction on river flow and sediment dynamics, and assesses the shifts in sediment sources in the lower Yellow River and the Yellow River Delta. The results indicate that the construction of the Xiaolangdi Reservoir has led to changes in the water-sediment relationship in the lower Yellow River, as well as downstream shifts in sediment sources.
Article
Environmental Sciences
Rajesh Sarda, Swades Pal
Summary: This study successfully examined the impact of damming on the eco-hydrological conditions of the river and wetland. It found that damming led to a decrease in flow and a high flow failure rate, resulting in a negative hydrological alteration. The impact of damming was more pronounced in the river, leading to a growing eco-hydro deficit.
GEOCARTO INTERNATIONAL
(2022)
Article
Environmental Sciences
Nikolaos Kamidis, Emmanuil Koutrakis, Argyrios Sapounidis, Georgios Sylaios
Summary: The study demonstrated that the operation of Thissavros and Platanovrisi hydropower dams significantly affected the hydrology, hydrochemistry, and nutrient stoichiometry of the Nestos River, particularly in terms of dissolved inorganic nitrogen (DIN) and total suspended solids (TSS). The dams' activities led to changes in the N:P ratio and storage of nutrients in the bottom layer of the reservoir, influencing the downstream environment.
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
Environmental Sciences
Bin Zhao, Peng Yao, Dong Li, Zhigang Yu
Summary: River damming and the construction of the Three Gorges Dam have significantly impacted the distribution and burial of organic carbon in the coastal areas of the Changjiang River Delta, leading to reductions and redistribution of organic carbon. As global climate change and human activities continue to affect these processes, further research and consideration of these carbon burial hotspots in global carbon models is necessary.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Md Nawaj Sarif, Lubna Siddiqui, Md Safikul Islam, Neha Parveen, Monojit Saha
Summary: River channel shifting in the deltaic regime is a continuous phenomenon that significantly impacts land use along the riverbanks. This study aims to understand the pattern of shifting and quantify erosion and deposition of the Ganga River using historical maps, aerial photographs, satellite imagery, and GIS techniques. The research found higher erosion on the east bank and significant deposition on the west bank between 1965 and 2017.
INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH
(2021)
Article
Environmental Sciences
Norbert Kamjunke, Holger Brix, Gotz Floeser, Ingeborg Bussmann, Claudia Schuetze, Eric P. Achterberg, Uta Koedel, Philipp Fischer, Louise Rewrie, Tina Sanders, Dietrich Borchardt, Markus Weitere
Summary: The nutrient and carbon dynamics within river-estuary-coastal water systems were analyzed to understand the flux of matter from the terrestrial environment to the ocean. The study revealed that the distribution and variations of nutrients and carbon varied significantly in different water environments, influenced by the travel time of water and nutrient fluxes, thereby affecting the functionality and stability of the aquatic ecosystems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Evan N. Dethier, Carl E. Renshaw, Francis J. Magilligan
Summary: Rivers play crucial roles in supporting ecosystems, human health, and infrastructure. However, limited sampling has hindered our understanding of significant changes in river systems. Satellite-based measurements have shown widespread global changes in suspended sediment concentration and flux, which are directly caused by human activities in the past 50 years. Dams in the global hydrologic north have reduced sediment flux to 49% of pre-dam conditions, while intensive land-use change in the global hydrologic south has increased river suspended sediment concentration by an average of 41 +/- 7% compared to the 1980s. This north-south divergence has rapidly altered global patterns in sediment flux, with South America becoming the dominant source of suspended sediment instead of Asia.
Article
Geography, Physical
Zican He, Zhaohua Sun, Yitian Li, Qianyi Zhao, Yong Hu, Zhenghao Chen
Summary: The Three Gorges Dam has significantly impacted the downstream gravel-sand transition, causing some gravel to move downstream more frequently during low-flow periods. However, these effects are localized and contribute little to overall migration of the gravel-sand transition in the Yangtze River. This study highlights the importance of river morphology in determining additional migration of the gravel-sand transition after transient downstream movement.
EARTH SURFACE PROCESSES AND LANDFORMS
(2022)
Article
Geosciences, Multidisciplinary
Xi Wei, Sabine Sauvage, Sylvain Ouillon, Thi Phuong Quynh Le, Didier Orange, Marine Herrmann, Jose-Miguel Sanchez-Perez
Summary: The study aimed to characterize and quantify the suspended sediment flux of the Red River basin under short-term climate variability and dam constructions. It found that dams have a significant impact on reducing sediment yield, with precipitation, slope, and agricultural practices being key factors influencing soil erosion in the basin.
Article
Engineering, Civil
Murat Can, Emre Calisir, Adem Akpinar
Summary: This study investigates the spatio-temporal changes in the downstream river bed during a dam construction and analyzes the impacts on erosion-accumulation dynamics caused during the establishment of the dam. The results show that accumulation and scouring occurred in different seasons in the upstream and downstream areas of the dam, respectively. After the dam excavation was over, the river bed reached an equilibrium condition with a slight accumulation.
KSCE JOURNAL OF CIVIL ENGINEERING
(2022)
Article
Biodiversity Conservation
Yumeng Tang, Lihua Chen, Zhenyan She
Summary: This study investigated the impacts of anthropogenic activities, especially cascade reservoirs, on the hydrological regimes and ecological environment of the Hongshui River Basin. By using eco-flow indicators and ecologically-relevant hydrological indicators, the study proposed an effective method to evaluate the eco-hydrological regimes, providing insights for watershed management and riverine ecosystem protection.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
J. J. Major, K. R. Spicer, A. R. Mosbrucker
Summary: The cataclysmic eruption of Mount St. Helens in 1980 drastically changed the upper North Fork Toutle River valley, leading to the formation of a new channel system. Flood events from 1996 to 2015 have shown that the effectiveness of floods in this environment is influenced by both geomorphic and environmental factors. Strong coupling, local geologic and hydraulic conditions, event sequencing, and possibly a longitudinal gradient in stream power are important factors affecting event effectiveness on channel modification.
WATER RESOURCES RESEARCH
(2021)
Article
Marine & Freshwater Biology
Shaotong Zhang, Yaqi Zhang, Jishang Xu, Lei Guo, Guangxue Li, Yonggang Jia, Lulu Qiao, Jinran Wu, Mingzheng Wen, Chaoqi Zhu
Summary: In situ observations were conducted to investigate the sediment dynamics in an abandoned lobe of the Yellow River Delta. The study revealed the erosion mechanism and the transport patterns of suspended sediment in the area.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Biodiversity Conservation
Hongbiao Zi, Xin Jing, Anrong Liu, Xiaomin Fan, Si-Chong Chen, Hao Wang, Jin-Sheng He
Summary: Climate warming has an impact on plant sexual reproduction, leading to changes in species distribution and community dynamics. The study found that warming overall decreased the number of fruits and increased seed mass, but had little effect on flower number, fruit mass, or seed number. The response of seed mass to warming was regulated by pollination type, with insect-pollinated plants showing a stronger response than wind-pollinated plants. The study also found that warming increased seed mass for nondominant species but not for dominant species. Phylogenetic relatedness did not explain the effects of warming on plant reproductive effort and success. Furthermore, there was a negative relationship between the effects of warming on flowering onset and the responses in terms of fruit and seed number, indicating a cascading effect of plant reproductive development.
GLOBAL CHANGE BIOLOGY
(2023)
Review
Energy & Fuels
Xin Jing, Zhuang Zhang, Tianyang Chen, Jingshan Luo
Summary: In the last decade, perovskite solar cells have made significant progress with a certified photoelectric conversion efficiency of 25.7%, comparable to single-crystal silicon solar cells, but their commercialization is still limited by stability issues. To address this, inorganic hole transport materials (HTMs) have been widely studied due to their superior stability, low fabrication cost, and high conductivity compared to traditional organic HTMs. This review summarizes the intrinsic properties, fabrication methods, and progress made with widely studied inorganic p-type materials for HTMs, as well as discusses the cost of various inorganic HTMs.
Article
Biochemistry & Molecular Biology
Kaiyao Zhang, Zhongmin Fu, Xiaoxue Fan, Zixin Wang, Siyi Wang, Sijia Guo, Xuze Gao, Haodong Zhao, Xin Jing, Peiyuan Zou, Qiming Li, Mengjun Chen, Dafu Chen, Rui Guo
Summary: Ascosphaera apis exclusively infects bee larvae, causing chalkbrood disease and reducing adult bees and colony productivity. This study found that A. apis infestation significantly decreases the activities of antioxidant enzymes in bee larvae and negatively affects their survival rate.
Article
Computer Science, Software Engineering
Boqin Zhang, Xin Jing, Shashikant Kumar, Phanish Suryanarayana
Summary: M-SPARC is a MATLAB code that enables ab initio Kohn-Sham Density Functional Theory simulations. Version 2.0.0 of the software adds relativistic effects, dispersion interactions, and advanced exchange-correlation functionals, enhancing the accuracy of first principles calculations performed using M-SPARC.
Article
Geosciences, Multidisciplinary
Tingting Sun, Yugang Wang, Yifei Guo, Xin Jing, Wenting Feng
Summary: Understanding soil microbial resource limitation is important for belowground nutrient cycling, and climate plays a primary role in regulating microbial resource limitation. In this study, the elevational patterns of microbial carbon (C) and nutrient (P:N) limitations were examined in the Tianshan Mountain. It was found that microbial C limitation decreased and microbial P:N limitation increased with increasing elevation, contrary to the latitudinal patterns. Soil microclimate and resource were identified as important factors in regulating microbial C and P:N limitation along the elevational gradient.
Article
Engineering, Environmental
Wenjun Meng, Lei Zhu, Zhuang Liang, Haoran Xu, Wenxiao Zhang, Jin Li, Yuanzheng Zhang, Zhihan Luo, Guofeng Shen, Huizhong Shen, Yilin Chen, Hefa Cheng, Jianmin Ma, Shu Tao
Summary: A clean heating campaign in northern China replaced coal with electricity or natural gas among 13.9 million rural households, resulting in significant reductions in PM2.5 emissions and exposure, as well as a decrease in premature deaths attributable to residential emissions. However, the benefits and costs were unevenly distributed, with residents in mountainous areas experiencing less benefit but paying more due to higher costs. Targeted investment and subsidies in less developed areas, as well as promoting less expensive alternatives, could help achieve improved air quality, reduced health impacts, and reduced inequity in future clean heating interventions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xinlei Liu, Yaojie Li, Zhihan Luo, Ran Xing, Yatai Men, Wenxuan Huang, Ke Jiang, Lu Zhang, Chao Sun, Longjiao Xie, Hefa Cheng, Huizhong Shen, Yuanchen Chen, Wei Du, Guofeng Shen, Shu Tao
Summary: Through long-term field monitoring using low-cost sensors, we evaluated the variations of indoor PM2.5 in rural areas. We found large variations of household PM2.5 across different homes and within households. Factors such as outdoor PM2.5, outdoor temperature, and indoor-outdoor temperature difference have significant impacts on the variation of indoor PM2.5.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
News Item
Oncology
Russell C. Cattley, Hans Kromhout, Meng Sun, Erik J. Tokar, Mohamed A-E Abdallah, Alison K. Bauer, Kendra R. Broadwater, Laura Campo, Emanuela Corsini, Keith A. Houck, Gaku Ichihara, Michiharu Matsumoto, Simone Morais, Jaroslav Mraz, Tetsuo Nomiyama, Kristen Ryan, Huizhong Shen, Takeshi Toyoda, Kirsi Vahakangas, Marianna G. Yakubovskaya, Il Je Yu, Nathan L. DeBono, Aline de Conti, Fatiha El Ghissassi, Federica Madia, Heidi Mattock, Elisa Pasqual, Eero Suonio, Roland Wedekind, Lamia Benbrahim-Tallaa, Mary K. Schubauer-Berigan
Article
Environmental Sciences
Chunyan Jiang, Chenglei Pei, Chunlei Cheng, Huizhong Shen, Qianhua Zhang, Xiufeng Lian, Xin Xiong, Wei Gao, Ming Liu, Zixin Wang, Bo Huang, Mei Tang, Fan Yang, Zhen Zhou, Mei Li
Summary: This study determined the VOC emission factors and source profiles in five industrial sectors based on large-scale field measurements in Guangzhou, China. The emission factors ranged from 1.6-152.4 kg/t to 3.1-242.2 kg/t using different measurement methods. Unique VOC source profiles were developed, and regional diversities in emission characteristics were observed. Controlling the emissions of aromatics and OVOCs is crucial for reducing O3 growth momentum, and prioritizing the control of 1,2-dibromoethane is important due to its high carcinogenic risk potential.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Sijia Lou, Manish Shrivastava, Aijun Ding, Richard C. Easter, Jerome D. Fast, Philip J. Rasch, Huizhong Shen, Staci Massey L. Simonich, Steven J. Smith, Shu Tao, Alla Zelenyuk
Summary: The lung cancer risk from exposure to ambient polycyclic aromatic hydrocarbons (PAHs) is expected to change significantly by 2050 compared to 2008 due to changes in climate and emissions. Residential biofuel use in East Asia and South Asia contributes to the higher BaP concentrations, exceeding WHO-recommended limits. However, stringent air quality policies in developed countries have led to a substantial decrease in PAH lung cancer risk. Future policies should focus on reducing air pollutant emissions and promoting efficient combustion technologies.
Article
Environmental Studies
Xin Jing, Yuefei Zhuo, Zhongguo Xu, Yang Chen, Guan Li, Xueqi Wang
Summary: Coastal wetlands, a unique type of wetland that connects terrestrial and marine ecosystems, play a crucial role in climate change mitigation, adaptation, and the advancement of human culture. However, increasing human activity poses a threat to coastal wetland ecosystems, leading to a growing interest in wetland restoration and reconstruction. This study utilized the InVEST model and ArcGIS to analyze the spatiotemporal changes in ecosystem services before and after the implementation of coastal wetland restoration policies, resulting in the identification of ecological restoration patterns and corresponding strategies.
Article
Ecology
Litao Lin, Zhiyong Ruan, Xin Jing, Yugang Wang, Wenting Feng
Summary: Bacterial richness declined but fungal richness increased under salinization. Bacteria did not become interactively compact or facilitative under salinization. Fungi exhibited more compartmentalized and competitive patterns under salinization. Fungal stability showed steeper increases under salinization than bacterial stability.
SOIL ECOLOGY LETTERS
(2023)
Article
Agriculture, Multidisciplinary
Bingming Chen, Wenting Feng, Xin Jing, Yugang Wang
Summary: Dryland agricultural expansion leads to a decrease in soil inorganic carbon (SIC) content and an increase in variability, with edge effects also influencing SIC content and variability. It is crucial to conserve SIC during dryland agricultural expansion and to increase the number of sampling points in areas with high variability to accurately estimate SIC distribution.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2023)
Article
Engineering, Environmental
Jinjian Zhang, Huizhong Shen, Yilin Chen, Jing Meng, Jin Li, Jinling He, Peng Guo, Rong Dai, Yuanzheng Zhang, Ruibin Xu, Jinghang Wang, Shuxiu Zheng, Tianyang Lei, Guofeng Shen, Chen Wang, Jianhuai Ye, Lei Zhu, Haitong Zhe Sun, Tzung-May Fu, Xin Yang, Dabo Guan, Shu Tao
Summary: The iron and steel industry is significant for socio-economic progress but also contributes to greenhouse gas emissions and air pollution. This study provides a comprehensive analysis of global emissions from the industry over the past 60 years and predicts future trends up to 2050. The findings highlight the different trends for various pollutants, such as a consistent decrease in PM2.5 emissions from 1970 to 2000 and recent declines in NOx and SO2 emissions due to stricter controls. Projections suggest that developing nations (excluding China) will contribute a larger share of global PM2.5 emissions by 2050.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Wenxiao Zhang, Haoran Xu, Xinyuan Yu, Jin Li, Yuanzheng Zhang, Rong Dai, Shuxiu Zheng, Wenjun Meng, Huizhong Shen, Yilin Chen, Guofeng Shen, Jianmin Ma, Bengang Li, Junfeng Liu, Xuejun Wang, Shu Tao
Summary: Following actions taken in China, there has been a significant reduction in annual mean fine particle (PM2.5) concentrations since 2013. However, some cities still exceed the national air quality standard. A study evaluated the trends of PM2.5 from 2014 to 2022 and found a continuous decline, but at a decreasing rate despite increasing pollution control investments. The study suggests implementing more rigorous standards in regions where the current standards have been met to further strengthen abatement efforts.
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.
