Article
Marine & Freshwater Biology
Donald M. Anderson, Elizabeth Fensin, Christopher J. Gobler, Alicia E. Hoeglund, Katherine A. Hubbard, David M. Kulis, Jan H. Landsberg, Kathi A. Lefebvre, Pieter Provoost, Mindy L. Richlen, Juliette L. Smith, Andrew R. Solow, Vera L. Trainer
Summary: Harmful algal blooms (HABs) in the U.S. have seen a significant increase in both qualitative and quantitative aspects over the past thirty years, with a wider range of toxic species and toxins, expanded affected areas, and new poisoning syndromes emerging. Factors contributing to this expansion include human activities like nutrient pollution and ocean warming, necessitating new approaches to monitoring and management for resource managers and public health officials.
Article
Engineering, Environmental
Zheng-Xi Zhou, Ren-Cheng Yu, Ming -Jiang Zhou
Summary: Harmful algal blooms (HABs) in the East China Sea are experiencing changes due to global warming, eutrophication, and other factors. A model predicts that dinoflagellate blooms will become more frequent and intense in the next 30 years. Nutrient composition changes and accelerated warming associated with climate change are the main drivers. To prevent further intensification of dinoflagellate blooms, efforts should be made to reduce nitrogen inputs and maintain or increase silicate inputs.
Article
Environmental Studies
Doris Soto, Jorge Leon-Munoz, Rene Garreaud, Renato A. Quinones, Francisco Morey
Summary: The increasing occurrences of harmful algal blooms affecting mariculture in southern Chile are related to both climatic factors and increasing eutrophication of coastal zones. The role of climate change in these blooms is becoming more relevant, but efforts to separate its impact from other causal factors are inconclusive. Government and farmers have not paid enough attention to scientific information and advice, leading to recent salmon mortality due to harmful algal blooms. Policy recommendations are provided to address this issue.
Article
Marine & Freshwater Biology
Ryan M. McCabe, Barbara M. Hickey, Vera L. Trainer
Summary: This article discusses a bulletin that communicates the risk of toxic Pseudo-nitzschia blooms to shellfish harvest in the Pacific Northwest region of the United States. The bulletin provides information and alerts to shellfish managers about adverse environmental conditions that could lead to toxic blooms. It complements beach phytoplankton monitoring programs and offers additional forewarning about potential toxin outbreaks.
Article
Environmental Sciences
Sem Likumahua, Francesca Sangiorgi, M. Karin de Boer, Willem M. Tatipatta, Daniel D. Pelasula, Dominggus Polnaya, Jance Hehuwat, Donna M. Siahaya, Anita G. J. Buma
Summary: The study documented dinocyst ecological preferences in Ambon Bay, Eastern Indonesia, and investigated the role of bay sediments as seedbanks for toxic bloom events. Twenty-three dinocyst species were identified, with high concentrations found in the inner bay. Environmental factors played a significant role in dinocyst distribution, with Polysphaeridium zoharyi cyst concentration positively correlated with phosphorus. Cysts may serve as seedbanks for Pyrodinium bahamense blooms in the area.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Miles Medina, David Kaplan, Eric C. Milbrandt, Dave Tomasko, Ray Huffaker, Christine Angelini
Summary: Karenia brevis blooms have severe impacts on Florida's Gulf Coast ecosystems, coastal economies, and public health. Research shows that river discharge and nitrogen inputs influence the blooms through different causal mechanisms, suggesting the need for watershed-scale nutrient management and modifications to discharge protocols to mitigate the blooms.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Ecology
Gwynneth Matcher, Daniel A. Lemley, Janine B. Adams
Summary: Using a metabarcoding approach, this study investigated the impact of a harmful algal bloom of Heterosigma akashiwo on bacterial community structures in the Sundays Estuary in South Africa. The study found bacterial lineages with respiratory flexibility and potential for both aerobic and anaerobic metabolism even in hypoxic bottom waters. This research highlighted the correlation between bacterial community profiles and the physiological state of the algal bloom, with specific bacterial families responding differently to the bloom event.
AQUATIC MICROBIAL ECOLOGY
(2021)
Article
Marine & Freshwater Biology
Eugin Bornman, Paul D. Cowley, Janine B. Adams, Nadine A. Strydom
Summary: The study investigated the estuarine movement patterns of Mugil cephalus in response to Harmful algal blooms in a eutrophied estuary in South Africa. The results showed that the fish mainly occupied the upper mesohaline to lower oligohaline zones and avoided the bloom maxima areas. This is the first study to document small-scale intra-estuary movements of a mugilid worldwide and to suggest avoidance behavior of estuarine fishes in response to HABs.
ESTUARINE COASTAL AND SHELF SCIENCE
(2021)
Article
Environmental Sciences
Haixia Guo, Rongshuo Cai, Hongjian Tan
Summary: Harmful algal blooms (HABs) are occurring frequently in China's offshore waters, and are influenced by climate and environmental factors. The frequency of HABs is expected to increase significantly in the coming decades, with potential impacts on phytoplankton conditions.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Zongmei Cui, Qing Xu, Kate Gibson, Shuya Liu, Nansheng Chen
Summary: The first metabarcoding analysis of HAB species was conducted in the Changjiang Estuary, identifying 86 HAB species, with most showing similar distribution patterns related to salinity and temperature gradients, as well as other key environmental factors. Unique HAB species, such as Katablepharis japonica and Skeletonema marinoi, not previously reported in the Changjiang Estuary, were also identified. The richness of HAB species in the estuary supports the potential formation of diverse HABs under favorable environmental conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Marine & Freshwater Biology
Xiaodong Wang, Huiyin Song, Yan Wang, Nansheng Chen
Summary: Chinese researchers have made significant progress in studying the harmful algal bloom species Phaeocystis globosa, but many of their findings remain unknown to international colleagues. P. globosa in Chinese coastal waters display unique genetic, phenotypical, and physiological features, such as a complex life history and strong genetic diversity.
Article
Multidisciplinary Sciences
Donald M. Anderson, Evangeline Fachon, Robert S. Pickart, Peigen Lin, Alexis D. Fischer, Mindy L. Richlen, Victoria Uva, Michael L. Brosnahan, Leah McRaven, Frank Bahr, Kathi Lefebvre, Jacqueline M. Grebmeier, Seth L. Danielson, Yihua Lyu, Yuri Fukai
Summary: With rising temperatures and sea ice loss, toxic algae like Alexandrium catenella are spreading into Arctic waters, posing a significant threat to human health in southeastern Alaska. Over the past few decades, there has been a significant increase in cyst deposition in the Chukchi Sea, leading to potential massive blooms that could impact public health and ecosystem in Alaskan Arctic communities.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Environmental Sciences
Brian E. Lapointe, Rachel A. Brewton, Lynn E. Wilking, Laura W. Herren
Summary: In Florida's Indian River Lagoon, anthropogenic eutrophication has led to harmful algal blooms and seagrass losses. Policy makers implemented fertilizer bans to improve water quality, but the study found that nutrient concentrations and nitrogen isotope values actually increased after the bans were enacted. This suggests that human waste is a primary contributor to the eutrophication problem in the lagoon, highlighting the insufficiency of current management actions.
MARINE POLLUTION BULLETIN
(2023)
Article
Environmental Sciences
Eugin Bornman, Daniel A. Lemley, Janine B. Adams, Nadine A. Strydom
Summary: Harmful algal blooms (HABs) have a negative impact on the abundance of the estuarine-dependent fish species Mugil cephalus in Sundays Estuary. The presence of HAB species Heterosigma akashiwo alters the dissolved oxygen levels in the estuary, resulting in unfavorable conditions for the fish. The study suggests that unsustainable agricultural fertilization could lead to more severe and frequent HABs, causing a decline in fish nursery quality.
ESTUARIES AND COASTS
(2023)
Review
Chemistry, Multidisciplinary
Barathan Balaji-Prasath, Ying Wang, Yu Ping Su, David P. Hamilton, Hong Lin, Luwei Zheng, Yong Zhang
Summary: This article reviews physical, chemical, and biological control methods applicable to red tide species in marine and estuarine water bodies, and discusses the mechanisms of algal bloom outbreaks and their applications.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Article
Area Studies
Yan Xiaojun, Li La
Summary: Today, authoritarian states, including China, use state-run propaganda operations to cultivate political loyalty among their diasporic subjects beyond national borders. By disseminating carefully tailored discourses, penalizing opposing voices, promoting a unified interpretive framework, forming a standard meaning system, coordinating collective action, and fostering an integrated patriotic identity, autocratic states aim to construct a stable, exclusive, and institutionalized diasporic network of influence within host societies. This unprecedented forging of solidarity among diasporic Chinese is attributed to China's extraterritorial propaganda, which relies on concise, catchy, and carefully tailored symbolic resources to extend political influence beyond national borders. This poses novel challenges to the traditional concept of the sovereign state.
Article
Oceanography
Lina Cai, Xiaoqi Jiang, Xiaojun Yan, Yan Bai, Jianqiang Liu, Menghan Yu, Rong Tang, Jingjing Jiang
Summary: A new method named Shield and Vortex 1-2 (SAV1-2) was established to extract spatial texture information from sun glitter observed from satellites. The method was used to extract sea surface texture detail information around Diaoyu Dao and its affiliated islands. The results showed stable shield effects and Karman vortex streets upstream and downstream of the islands, with the dominant direction of the Kuroshio Current being east. The study also analyzed the changes in water temperature, color, and chlorophyll a concentration.
ACTA OCEANOLOGICA SINICA
(2023)
Article
Agricultural Engineering
Yahui Bo, Ruirui Chu, Danni Sun, Xiangyuan Deng, Chengxu Zhou, Xiaojun Yan, Roger Ruan, Pengfei Cheng
Summary: Microalgae cannot fulfill the bait demand for aquaculture due to limitations in light intensity and other unfavorable conditions. This study selected 6 mixotrophic microalgae and screened for the optimal strains and organic carbon sources. Thalassiosira pseudonana and Chlorella sp. were found to be suitable for mixotrophic culture. When glycerol was added, Thalassiosira pseudonana showed a 1.67-fold increase in maximum cell density compared to the photoautotrophic group, while Chlorella sp. exhibited a 1.69-fold increase with acetic acid. Metabolomic analysis revealed that mixotrophic bait microalgae could promote the accumulation of lipids and amino acids.
BIORESOURCE TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Huan Jiang, Jiabao Hu, Huihui Xie, Man Zhang, Chunyang Guo, Youyi Zhang, Yaya Li, Cheng Zhang, Shanliang Xu, Danli Wang, Xiaojun Yan, Yajun Wang, Xubo Wang
Summary: In this study, the morphological and histological characteristics of the pharyngeal sac in Pampus argenteus were examined using histochemical techniques and electron microscopy. The pharyngeal sac showed unique characteristics such as well-developed muscular walls, weakly keratinized epithelium, numerous goblet cells, and needle-like processes on the papillae. RNA-seq analysis revealed that phenotype-associated genes were upregulated, while genes related to nutrient digestion and absorption were downregulated in the pharyngeal sac.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Wenhao Li, Qiang Gao, Yanjie Hu, Yutong Shi, Xiaojun Yan, Lijian Ding, Shan He
Summary: Benzofuran-containing compounds are a promising scaffold with a wide range of pharmacological properties for drug development. A new benzofuran derivative, dibetanide, was discovered and characterized, featuring an unusual conjugated triene side chain. The structure and absolute configuration of the compound were determined using experimental and computational methods. The compound exhibited inhibitory activity against Botrytis cinerea, suggesting potential antibacterial properties.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Environmental Sciences
Siwen Zhang, Xiaohui Chen, Zongjun Ji, Xiaojun Yan, Kunpeng Kong, Yuanyang Cai, Qichao Zhu, Muhammad Atif Muneer, Fusuo Zhang, Liangquan Wu
Summary: Aluminum (Al) toxicity is a serious threat to root formation and crop growth due to soil acidification. This study focused on the effect of Al3+ on citrus roots in acidified red soil. The results showed that rapid soil acidification occurred in pomelo orchards, and optimized fertilization and liming treatments effectively reduced Al toxicity in roots and increased yield by improving soil pH and base saturation. Structural equation modeling confirmed the importance of increasing soil pH and base saturation while decreasing exchangeable Al for citrus production in acidic soil.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Agricultural Engineering
Xia Xiao, Yang-Yang Liu, Xiao-Jun Yan, Xiao-Na Wang, Bin-Yuan Hu, Song Chen, Yan-Yan Zhu, Zhao-Jie Wang, Tian-Zhen Xie, Ying-Jie He, Li-Xing Zhao, Yun-Li Zhao, Xiao-Dong Luo
Summary: Allium chinense G. Don, known as Ganoderma of vegetables, has been used historically to treat blood stasis syndrome and reduce brain damage caused by reduced oxygen-carrying capacity. The anti-hypoxic effect of A. chinense was investigated using a mouse model of cerebral anoxia, and 16 compounds were isolated, showing potential anoxia-tolerant activity in vitro. These compounds also regulated oxidative stress markers and suppressed the expression of inflammatory proteins. This study provides a new nutritional strategy for A. chinense against cerebral anoxia and altitude illness.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Plant Sciences
Jianquan Song, Hejing Zhao, Linxin Zhang, Zheng Li, Jichang Han, Chengxu Zhou, Jilin Xu, Xiaohui Li, Xiaojun Yan
Summary: This study revealed that the heat shock transcription factor PtHSF1 positively regulates the synthesis of triacylglycerol and fucoxanthin in Phaeodactylum tricornutum. Overexpression of PtHSF1 increased the contents of triacylglycerol and fucoxanthin and upregulated key enzyme genes involved in their biosynthesis pathways. Gene silencing of PtHSF1 had the opposite effect. This study provided insights into the regulation mechanisms of PtHSF1-mediated triacylglycerol and fucoxanthin synthesis.
PLANT AND CELL PHYSIOLOGY
(2023)
Article
Plant Sciences
Xiaojun Yan, Delian Ye, Yafu Tang, Muhammad Atif Muneer, Peter Christie, Congyue Tou, Weidong Xu, Bingrong Shen, Jinxian Xu, Jiangzhou Zhang
Summary: Quantitative analysis using life cycle assessment was conducted to assess the environmental impacts of plum production in Zhao'an county, southeast China. The farms were categorized into four groups based on yield and environmental impacts. Excessive fertilizer application was identified as the main source of environmental impacts, and reducing fertilizer usage without compromising plum yield could be achieved by studying farms with high yield and low environmental impact. These results provide an important foundation for improving plum production management and promoting "green" agricultural development by reducing environmental impacts.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Environmental Sciences
Zhibing Jiang, Yuanli Zhu, Zhenhao Sun, Hongchang Zhai, Feng Zhou, Xiaojun Yan, Jiangning Zeng, Jianfang Chen, Quanzhen Chen
Summary: Western boundary currents, such as the Kuroshio in the North Pacific, bring abundant diazotrophs into marginal seas, which enhance N-2 fixation. The intrusion of Kuroshio greatly increased N-2 fixation in the East China Sea (ECS) and southern Yellow Sea (SYS). N-2 fixation rates (NFRs) were higher in the ECS oceanic and mesohaline regions compared to the SYS and ECS low-salinity and coastal upwelling regions.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Environmental Sciences
Rong Tang, Lina Cai, Xiaojun Yan, Xiaomin Ye, Yuzhu Xu, Jie Yin
Summary: The response of environmental factors in Zhoushan Fishery to Typhoon In-fa was analyzed using satellite and reanalysis data. The study revealed that the typhoon caused a decrease in sea surface temperature and an overall decrease in sea surface salinity. The concentration of chlorophyll a initially decreased and then increased due to the typhoon's effect on phytoplankton growth. These changes in environmental factors have significant impacts on fish behavior and community composition in fisheries.
Article
Genetics & Heredity
Kaifen Zhang, Yongdong Zhou, Weihua Song, Lihua Jiang, Xiaojun Yan
Summary: In this study, RAD-seq analysis was performed on 54 individuals of Larimichthys crocea to investigate its genetic structure and diversity at the genome level. The study revealed distinct genetic differentiation between the large yellow croaker populations in the Ningde and Zhoushan coastal waters. Different genetic diversity indices indicated a differentiation trend between wild and farmed populations in Ningde. Genetically differentiated genomic regions and genes related to fatty acid metabolism and growth were identified. These findings contribute to the understanding of genetic differentiation and adaptation in Larimichthys crocea, and provide a theoretical basis for the conservation and restoration of its genetic resources.
Article
Chemistry, Physical
Shengwen Zou, Jun Kang, Yuzheng Zhang, Mingjing Qi, Xiaojun Yan, Xiaoliang Zhang, Jianmei Huang
Summary: In this work, transition metal nickel ion (Ni2+) was introduced into CsPbI3 nanocrystals (NCs) to stabilize their black phase. The optimized CsPbI3 NCs film exhibited a record photoactive black-phase stability time of 54 hours. The doped Ni2+-CsPbI3 NCs solutions maintained bright red emission even after vigorous stirring and long-term storage, showing improved stability and photoluminescence quantum yield.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Fisheries
Sentao Chen, Peng Shi, Qingkai Feng, Xiaoting Qiu, Jilin Xu, Xiaojun Yan, Chengxu Zhou
Summary: In this study, a new C-type lectin (Rpcl) was identified from the Manila clam Ruditapes philippinarum, and its potential role in feeding and feed selection was investigated. The results showed that Rpcl had a carbohydrate recognition domain (CRD) and could selectively agglutinate with different microalgae. Feeding experiments revealed that Rpcl expression in the lip and gill of the clam fed with certain microalgae exhibited a significant upward trend with the change of time.
Article
Chemistry, Inorganic & Nuclear
Wenfeng Hao, Xiaojun Yan, Xiliang Guo, Wentao Wang, Taihong Yan, Jia-Nan Zhang, Wenfu Yan
Summary: Cs-137(+) is the main radioactive nuclide in nuclear wastewater. The efficient and fast removal of radioactive Cs+ from wastewater is essential for the safe use of nuclear energy and human health. In this study, a green and facile synthesis method of low-silica CHA zeolite with exceptional selectivity and deep removal ability for radioactive Cs-137(+) from real nuclear power wastewater was reported.
INORGANIC CHEMISTRY FRONTIERS
(2023)
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.