Article
Microbiology
Ran Jiang, Wen-Jing Qin, Ru-Yi Zhang, Kai Zhang, Xing Huang, Yong Li, Chen-Hao Zhou, Ting Zhu, Yan Zhang, Bin Zou, Ming Nie, Sung-Keun Rhee, Zhe-Xue Quan
Summary: This study demonstrates the significant impact of salinity on the abundance, activity, and relative contribution of comammox Nitrospira in coastal ecosystems. Different phylotypes of comammox Nitrospira exhibit varying sensitivity to salinity.
Article
Biotechnology & Applied Microbiology
Dongyao Sun, Mengyue Zhao, Xiufeng Tang, Min Liu, Lijun Hou, Qiang Zhao, Jun Li, Ji-Dong Gu, Ping Han
Summary: The discovery of complete ammonia oxidizers (comammox) has changed the traditional view of nitrification being a two-step process. Comammox Nitrospira species were found to be widely distributed in the Yangtze Estuary, with a distinct differentiation driven by salinity. Besides salinity, ammonia, pH, and particle size were also important environmental factors that influenced the niche differentiation of comammox Nitrospira species.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2021)
Article
Environmental Sciences
Mengyue Zhao, Xiufeng Tang, Dongyao Sun, Lijun Hou, Min Liu, Qiang Zhao, Uli Klumper, Zhexue Quan, Ji-Dong Gu, Ping Han
Summary: The recent discovery of complete ammonia oxidizers (comammox) challenges the traditional understanding of nitrification, showing that one organism can convert ammonia to nitrate. This study on nitrifying microorganisms in the Nanliu estuary demonstrates the niche specificity of different nitrifiers modulated mainly by salinity. The research also reveals a clear response by comammox Nitrospira to a wide range of simulated salinity levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biotechnology & Applied Microbiology
Xiufeng Tang, Jun Li, Dongyao Sun, Linfa Fang, Lijun Hou, Min Liu, Ping Han
Summary: This study investigated the nitrification process in typical inland and coastal wetlands in northern China and found a high diversity of ammonia oxidizers. Through simulating the freezing-thawing state and conducting microcosm incubation, researchers discovered that ammonia-oxidizing archaea and comammox Nitrospira clade B were able to recover their activities after the freeze-thaw cycle, indicating their resistance to freeze-thaw conditions.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2023)
Article
Biotechnology & Applied Microbiology
Sabita Ghimire-Kafle, Matt E. Weaver, Annette Bollmann
Summary: In this study, the comammox strain Nitrospira sp. BO4, obtained from Lake Burr Oak in Ohio, was characterized. It was found that Nitrospira sp.BO4 is a typical anaerobic bacterium capable of oxidizing ammonia to nitrate using nitrite as an intermediate. It showed the highest growth rates at low concentrations of ammonia, and its growth was inhibited by blue light while white light only slightly reduced its growth and red light had no effect. This research is important for understanding the physiological characteristics of anaerobic bacteria and the distribution and differentiation of different ammonia oxidizers in freshwater environments.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Soil Science
Wenlong Gao, Yajun Fu, Changhua Fan, Wen Zhang, Yongsheng Wang, Ning Li, Huiran Liu, Xin Chen, Yuqin Liu, Xiaolong Wu, Qinfen Li, Miao Chen
Summary: Comammox Nitrospira abundance is predicted by the abundance of ammonia-oxidizing archaea (AOA) and bacteria (AOB), as well as soil pH and nitrate and ammonium levels. Different genetic clades have different predictors, with Clade A and Clade B being influenced more by soil pH and ammonium levels.
SOIL BIOLOGY & BIOCHEMISTRY
(2023)
Article
Microbiology
Yanan Wang, Xibai Zeng, Qiang Ma, Yang Zhang, Wantai Yu, Zhong Zheng, Nan Zhang, Liyang Xu
Summary: The discovery of the complete ammonia oxidizer (comammox) has challenged the traditional understanding of nitrification, which involved two distinct groups of nitrifiers. This study investigated the effects of long-term fertilization on the abundances and community composition of ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA), nitrite-oxidizing bacteria (NOB), and comammox Nitrospira in an agricultural ecosystem in Northeast China. The results demonstrated that different fertilization regimes significantly influenced the abundance and composition of these microbial communities, highlighting the ecological importance of comammox Nitrospira in terrestrial ecosystems.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Engineering, Environmental
Sarah Al-Ajeel, Emilie Spasov, Laura A. Sauder, Michelle M. McKnight, Josh D. Neufeld
Summary: Nitrification, the process of converting ammonia to nitrate, plays a significant role in engineered water treatment systems. Different microbial guilds participate in this process, however, their relative contributions to nitrogen cycling are still not well understood. Understanding the active nitrifiers is crucial for optimizing engineered systems that rely on nitrifiers for ammonia removal.
Article
Engineering, Environmental
Shanyun Wang, Xiaomin Wang, Yingying Jiang, Chang Han, Mike S. M. Jetten, Lorenz Schwark, Guibing Zhu
Summary: The discovery of complete ammonia oxidation (comammox) has changed our understanding of nitrification, and fringe soils in riparian ecosystems may serve as hotspots for comammox activity.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Microbiology
Pei-Chun (Lisa) Hsu, Hong J. Di, Keith Cameron, Andriy Podolyan, Henry Chau, Jiafa Luo, Blair Miller, Sam Carrick, Paul Johnstone, Scott Ferguson, Wenhua Wei, Jupei Shen, Limei Zhang, Hongbin Liu, Tongke Zhao, Wenxue Wei, Weixin Ding, Hong Pan, Yimeng Liu, Bowen Li
Summary: The recent discovery of comammox Nitrospira challenges our understanding of the nitrification process. This study found that comammox Nitrospira Clade B is more abundant than Clade A in a fertile dairy pasture soil and discovered a distinctive uncultured subcluster Clade B2. The study also revealed that comammox Nitrospira Clade B is active in nitrification and inhibited by high ammonium concentration and the nitrification inhibitor DCD. This is the first study to discover a new subcluster of comammox Nitrospira Clade B2 from agricultural soil.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Environmental Sciences
Hang Ding, Jiahui Zhang, Yuchun Wang, Mingming Hu, Jie Wen, Shanze Li, Yufei Bao, Jianwei Zhao
Summary: The construction of the reservoir has altered the processes of nitrogen migration and transformation in the river, leading to spatial differentiation of comammox bacteria. This study investigated the abundance and diversity of comammox bacteria in the sediments of three cascade reservoirs on the Lancang River in China. The results showed that comammox bacteria abundance varied spatially among reservoirs, but the variation trends of the two clades of comammox bacteria were similar within each reservoir.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Environmental Sciences
Boyan Li, Yunchen Wang
Summary: Understanding the dynamics of sediment transport and their underlying driving mechanisms is critical to sustainable river basin management. However, there is a lack of quantification of various drivers of sediment load change, and the impact of climate change on sediment transport under different global warming scenarios is not well understood.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Chunyan Qin, Yifei Ge, Jin Gao, Shengli Zhou, Jian Yu, Beixin Wang, Thibault Datry
Summary: Identifying ecological drivers and understanding their effects on metacommunity and beta diversity are crucial for bioassessment and river management. This study explored the impacts of anthropogenic influences on macroinvertebrate communities in the Yangtze River Delta, China, and found that both species sorting and dispersal shaped the communities, with their importance varying with the levels of anthropogenic impacts. Environmental variables and spatial processes should be considered for effective ecosystem management.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Remote Sensing
Pinglang Kou, Yuxiang Tao, Ali P. Yunus, Qiang Xu, Rui Liu, Zhao Jin, Wenli Liang, Ying Xia, Shuang Yuan
Summary: Nighttime light data is important for understanding urban sprawl and human activities. Through radiometric quantification, changes in nighttime light can be explained. Using annual data from 2013 to 2020, we investigated the magnitude and distribution of nighttime light change in the Yangtze River Economic Belt in China. We found that the nighttime light has been increasing annually, with a significant difference between the eastern and western regions, indicating uneven development. Urbanization is accompanied by brightening of nighttime light, especially on cropland. To address this issue, sustainable regional development policies should be implemented, with a focus on urban densification patterns.
INTERNATIONAL JOURNAL OF REMOTE SENSING
(2023)
Article
Thermodynamics
Qinghua Pang, Xianwei Dong, Lina Zhang, Yung -ho Chiu
Summary: The Yangtze River Economic Belt (YREB) is one of the most energy-consuming regions in China, with household energy consumption playing a significant role in driving energy consumption. Energy intensity is the main factor inhibiting energy consumption, while energy structure and urban-rural consumption per capita contribute to increased energy consumption.
Article
Chemistry, Physical
Peng Yu, Jiawei Zhang, Tong Zheng, Ting Wang
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2016)
Article
Environmental Sciences
Tong Zheng, Ting Wang, Ruoqi Ma, Wen Liu, Feng Cui, Weiliang Sun
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Engineering, Environmental
Tong Zheng, Chenyuan Dang, Sining Zhong, Weiling Sun, Qian Chen
Summary: The study found that metal(loids) concentrations in the Danjiangkou Reservoir were lower than drinking water quality standards in China, with their distribution in water mainly controlled by factors such as total organic carbon, sulfate, temperature, and total phosphorus. In sediments, metal(loids) distribution was influenced by organic carbon, total phosphorus, and ammonia nitrogen. Risk assessment results indicated minor to moderate pollution in the reservoir sediments, with Sb and Cd posing the highest potential ecological risk.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2021)
Article
Engineering, Environmental
Xuming Xu, Huan Chen, Jinyun Hu, Tong Zheng, Ruijie Zhang, Haohui Zhong, Qiang Gao, Weiling Sun, Qian Chen, Jinren Ni
Summary: This study investigated the dissemination of metal resistance genes (MRGs) in urban rivers on the vulnerable Qinghai-Tibet Plateau and their relationship with metal(loid)s and bacterial communities. The results showed that effluents from wastewater treatment plants (WWTPs) partially promoted the prevalence of dissolved metal(loid)s, bacterial communities, and MRGs along the river. In the sediments, high concentrations of Hg and Cd, mainly sourced from intensive animal husbandry, strongly influenced the bacterial communities and MRGs. Moreover, bacterial communities predominantly determined the variation of MRGs in both water and sediments.
Article
Engineering, Environmental
Shanqing Yang, Qian Chen, Tong Zheng, Ying Chen, Xiaohui Zhao, Yifan He, Weiling Sun, Sining Zhong, Zhilong Li, Jiawen Wang
Summary: This study investigated the effects of metal(loid) pollution on the structure and function of archaeal communities. The results showed that the high-contamination zone had higher archaeal diversity but a lower habitat niche breadth. Metal-resistant species, particularly potential methanogens, were enriched in the high-contamination zone, and closer inter-taxon connections and higher network complexity were observed. The study also revealed that bioavailable metals contributed to the variations in archaeal communities and metal(loid) pollution reinforced deterministic processes in the archaeal community assembly.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Ying Zhou, Zongrui Li, Yu Zhu, Zhaofeng Chang, Yongxia Hu, Lin Tao, Tong Zheng, Mingdeng Xiang, Yunjiang Yu
Summary: This study investigated the levels of harmful substances in indoor dust collected from e-waste industrial parks and adjacent villages in south China. The results showed significant differences in levels and composition patterns between workshop and home dust. Although the estimated daily intakes of these substances were below acceptable levels, e-waste dismantling activities still posed a high burden on surrounding residents.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Ruoqi Ma, Mingquan Yan, Peng Han, Ting Wang, Bin Li, Shungui Zhou, Tong Zheng, Yandi Hu, Alistair G. L. Borthwick, Chunmiao Zheng, Jinren Ni
Summary: Thyroid disorders affect over two billion people worldwide due to iodine deficiency or excess. A national map of groundwater iodine in China reveals the spatial distribution of health risks associated with iodine in continental groundwater. Areas with higher altitude have greater non-carcinogenic risks due to lower iodine levels, while areas suffering from land over-use and anthropogenic overexploitation have higher risks associated with high groundwater iodine.
NATURE COMMUNICATIONS
(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.
