Article
Environmental Sciences
Qingsong Guan, Qingbin Li
Summary: The purpose of this study was to determine the contributions of denitrification and anammox to nitrogen loss in the sediments of Yellow River wetland, as well as explore the abundance of functional genes involved in these processes. Samples were collected from areas with different vegetation covers, and nitrogen isotope tracer technology and metagenomic sequencing were used for analysis. The results showed that denitrification was the main nitrogen removal pathway, accounting for 85% to 86% of nitrogen loss, while anammox was dominant in N2 production in the areas without vegetation coverage. The study also revealed the significance of the DNRA process in the efficient utilization of nitrogen in Yellow River wetland.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Environmental Sciences
Zihao Wang, Jinye Li, Xiaoya Xu, Kun Li, Qingfeng Chen
Summary: This study investigated the abundance of NC10 bacteria and the denitrifying anaerobic methane oxidation (DAMO) rate in different vegetation areas of the Yellow River Delta coastal wetland. The results showed that vegetation cover significantly increased the abundance of M. oxyfera-like bacteria, which played a crucial role in the DAMO process. Additionally, environmental factors such as nitrate, nitrite, total nitrogen, and conductivity were identified as key factors affecting the DAMO rate. This study provides molecular biological evidence for the existence of DAMO and contributes to our understanding of the global carbon and nitrogen cycle.
Article
Environmental Sciences
Xiangwei You, Xiao Wang, Ruixue Sun, Qiang Liu, Song Fang, Qingxian Kong, Xin Zhang, Chenghao Xie, Hao Zheng, Hui Li, Yiqiang Li
Summary: The application of char amendments in degraded soils is a promising solution for mitigating climate change. In this study, the effects of hydrochar on N2O emissions from coastal salt-affected soils were investigated. The results showed that hydrochar application effectively reduced cumulative N2O emissions by inhibiting nitrification and promoting the reduction of N2O to N2 by nitrous oxide reductase gene.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Lifei Sun, Chao Wang, Haoming Yu, Dongwei Liu, Benjamin Z. Houlton, Shaofeng Wang, Xiangfeng Zeng, Edith Bai, Yunting Fang, Yongfeng Jia
Summary: Through molecular and isotopic methods, the study found that denitrification is the dominant pathway of sedimentary N-2 production along the continental shelf of China, while anaerobic ammonium oxidation rate is correlated with hzsB gene abundance; temperature and dissolved oxygen regulate denitrification rates by influencing biotic factors such as functional genes and microbial biomass.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Engineering, Environmental
Hong-cheng Wang, Ying Liu, Yu-meng Yang, Ying-ke Fang, Shuang Luo, Hao-yi Cheng, Ai-jie Wang
Summary: Constructed wetlands integrated with sulfur autotrophic denitrification using elemental sulfur as the carbon source have the potential to efficiently remove nitrogen from carbon-limited wastewater. The sulfur autotrophic denitrification process in the SCW enhances nitrate removal efficiency and rate. The combined CW-SCW system allows for simultaneous removal of total ammonia nitrogen and nitrate.
Article
Environmental Sciences
Xiaoshuang Lai, Xuegang Li, Jinming Song, Huamao Yuan, Liqin Duan, Ning Li, Yingxia Wang
Summary: Organic matter plays a critical role in regulating microbial nitrogen loss pathways in marine ecosystems. This study reveals that organic-rich muddy sediments have higher nitrogen loss rates and anammox rates compared to sandy sediments in the coastal continental shelf of the East China Sea. The community distribution and abundance of denitrifying bacteria and anammox bacteria are intricately influenced by organic matter.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Binjie Zhao, Xinshuai Li, Yang Wang, Xiang Tan, Wenhua Qi, Hongran Li, Junwei Wei, Yong You, Wenjun Shi, Quanfa Zhang
Summary: The study investigated dissimilatory nitrate reduction rates in sediments of two subtropical rivers in China, revealing varying contributions of denitrification, anammox, and DNRA in different seasons and under different levels of human disturbance. The rates were correlated with environmental factors, highlighting the importance of understanding these processes for sustaining the ecohealth of river ecosystems.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Ge Qin, Hongyu Feng, Hui Zhao, Lu Xia, Wen Yang, Yongqiang Zhao, Nasreen Jeelani, Shuqing An
Summary: The study investigated the impact of coastal embankments on nitrogen cycling in Spartina alterniflora salt marshes. The results showed that the embankments significantly reduced nitrogen storage and concentrations in both plant and soil subsystems. However, the effects varied seasonally, with some nitrogen subpools increasing while others decreased. The establishment of embankments decreased soil salinity, leading to increased ion uptake by microbes and subsequently stimulating microbial biomass production.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Engineering, Environmental
Jiang -Chen Gong, Bing -Han Li, Jing-Wen Hu, Pei-Feng Li, Qian Liu, Gui-Peng Yang, Chun-Ying Liu
Summary: This study conducted year-round observations in the intertidal wetland of Jiaozhou Bay and found that the annual fluxes of nitrogen oxides (NOx) were significantly higher in vegetated wetlands than in non-vegetated wetlands. Temperature and organic carbon content were identified as factors affecting NOx flux, while anaerobic denitrifiers were the main contributors to NO production. Additionally, the tidal pulse was found to be a primary driver of short-term NOx emissions from intertidal wetlands.
Article
Engineering, Environmental
Ping Yang, Kam W. Tang, Chuan Tong, Derrick Y. F. Lai, Linhai Zhang, Xiao Lin, Hong Yang, Lishan Tan, Yifei Zhang, Yan Hong, Chen Tang, Yongxin Lin
Summary: Land reclamation poses a major threat to coastal wetlands worldwide and its effects on the nitrogen biogeochemical cycling in coastal regions are still poorly understood. In this study, the N2O emissions from a brackish marsh and converted shrimp aquaculture ponds in Southeast China were compared over a three-year period. The results showed that the aquaculture ponds had significantly lower N2O emissions compared to the marsh, which could be attributed to diminished nutrient input, changes in microbial community, and lower N2O production capacity of the sediment. Better management of pond water and sediment could further mitigate N2O emissions from aquaculture operations.
Article
Ecology
Sean J. Sharp, Kenneth J. Elgersma, Jason P. Martina, William S. Currie
Summary: Coastal wetlands play a crucial role in intercepting and removing nitrogen from watersheds, especially in areas dominated by agriculture and urban development. By studying the effects of hydrology and nitrogen loading on nitrogen removal and plant invasion in wetlands, it was found that longer residence time and hydroperiod can increase nitrogen removal efficiency, but also make the wetlands more vulnerable to invasion by nonnative species at low to medium nitrogen loading rates. This highlights a potential trade-off between nitrogen removal and wetland invasibility, emphasizing the complex interactions between community composition, nitrogen loading, and hydrology.
ECOLOGICAL APPLICATIONS
(2021)
Article
Oceanography
Calvin W. Mordy, Lisa Eisner, Kelly Kearney, David Kimmel, Michael W. Lomas, Kathy Mier, Peter Proctor, Patrick H. Ressler, Phyllis Stabeno, Eric Wisegarver
Summary: This study investigates the nitrogen deficit on the eastern shelf of the Bering Sea and its influencing factors, concluding that spatial variability is influenced by advection, mixing, and residence time. The study shows that approximately one-third of the inorganic nitrogen entering the shelf is lost, with the most severe deficits observed in certain areas.
CONTINENTAL SHELF RESEARCH
(2021)
Article
Microbiology
Zhenbo Chen, Chi Zhang, Zhihong Liu, Changchun Song, Shuai Xin
Summary: Excessive nitrogen input has negative effects on the health of marsh wetlands, particularly on the bacterial community. Through a long-term nitrogen input experiment, it was found that high-level nitrogen input significantly reduces the diversity of the bacterial community and inhibits certain dominant microorganisms. Nitrogen and ammonium were identified as critical factors affecting the soil microbial community. Furthermore, long-term nitrogen input reduces the abundance of nitrogen-fixing microorganisms and increases the abundance of nitrifying and denitrifying microorganisms, affecting the wetland ecosystem processes.
Article
Engineering, Civil
Wangshou Zhang, Hengpeng Li, Bing Li
Summary: This article develops a simple model to quantify the hourly denitrification at the reach scale and applies it to a flow-through river wetland in Southeast China. The model, which takes into account the concentration of dissolved N-2 at the inlet and outlet of the wetland, as well as air-water physical exchange, provides a complete picture of the diel variability during denitrification. The results show significant variation in denitrification rates with obvious day-and-night differences.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Adam C. Gold, Suzanne P. Thompson, Michael F. Piehler
Summary: Stormwater wet ponds (SWPs) are important nitrogen sinks that have seasonal variation in nitrogen cycling, affecting pond nitrogen removal. Sediments in SWPs generally function as total nitrogen (TN) sinks during nitrate-enriched conditions, but the fate of nitrate varies based on factors such as water temperature, dissolved organic nitrogen concentrations, and sediment oxygen uptake. This study suggests that coastal stormwater ponds may host reduced conditions that promote nitrate retention over denitrification, highlighting the need for further research on the fate of retained nitrate in SWP sediments and its impact on downstream water quality.
WATER RESOURCES RESEARCH
(2021)
Review
Environmental Sciences
Attila Csaba Kondor, Anna Viktoria Vancsik, Laszlo Bauer, Lili Szabo, Zoltan Szalai, Gergely Jakab, Gabor Maasz, Marta Pedrosa, Maria Jose Sampaio, Ana Rita Lado Ribeiro
Summary: This review provides a critical overview of research on the removal efficiency of priority substances and compounds of emerging concern through bank filtration, discussing influencing factors and future challenges. The findings show that the efficiency of bank filtration is influenced by multiple factors and varies for different substances.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Xinyan Wang, Shuai Zhang, Huihui Yan, Zhao Ma, Yunshan Zhang, Haining Luo, Xueli Yang
Summary: This study investigated the association between ambient PM2.5, O3 pollution, and ovarian reserve in reproductive-aged Chinese women. The results showed that increased exposure to PM2.5 and O3 was associated with decreased AMH levels, indicating reduced ovarian reserve. Notably, the effects of O3 exposure on ovarian reserve were different from those of PM2.5 exposure.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Tingting Ma, Yanjuan Ding, Fengjiao Xu, Chen Zhang, Min Zhou, Ya Tang, Yanrong Chen, Yating Wen, Rufei Chen, Bin Tang, Shigui Wang
Summary: The dragonfly species Orthetrum albistylum can accumulate heavy metals, and its heat shock protein genes have the potential to serve as biomarkers for monitoring environmental pollutants.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Naoto Ishiwaka, Koya Hashimoto, Masayoshi K. Hiraiwa, Francisco Sanchez-Bayo, Taku Kadoya, Daisuke Hayasaka
Summary: Systemic insecticides and rising temperatures have combined effects on the abundance of Odonata nymphs in paddy fields. The standalone effect of insecticide exposure decreased the Odonata community, while nymphs decreased synergistically with temperature rise in paddy water. However, the impacts of each stressor alone varied among species.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Marco Vecchiato, Carlo Barbante, Elena Barbaro, Francois Burgay, Warren R. L. Cairns, Alice Callegaro, David Cappelletti, Federico Dallo, Marianna D'Amico, Matteo Feltracco, Jean-Charles Gallet, Andrea Gambaro, Catherine Larose, Niccolo Maffezzoli, Mauro Mazzola, Ivan Sartorato, Federico Scoto, Clara Turetta, Massimiliano Varde, Zhiyong Xie, Andrea Spolaor
Summary: The Arctic region is facing contamination from long-range pollution and local human activities. Polycyclic Aromatic Hydrocarbons (PAHs) are used as environmental indicators for emission, transport, and deposition processes. Research conducted in the Arctic surface snow in Ny-Ålesund, Svalbard from October 2018 to May 2019 shows that long-range inputs of PAHs mainly occur in winter, while the most abundant analyte retene exhibits opposite seasonal trends.
ENVIRONMENTAL POLLUTION
(2024)
Review
Environmental Sciences
Maoshui Zhuo, Zhijie Chen, Xiaoqing Liu, Wei Wei, Yansong Shen, Bing-Jie Ni
Summary: This paper discusses the application of three catalytic processes (photocatalysis, electrocatalysis, and biocatalysis) in the management of microplastic pollution, and introduces the efficiency and catalytic mechanisms of different catalysts. It also proposes the development prospects for sustainable management of microplastic pollution.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Shiyu Chen, Zhenzhen Shi, Qiang Zhang
Summary: In this study, a human physiologically based pharmacokinetic (PBPK) model of diethyl phthalate (DEP) was developed to assess its toxicity. The model considers the distribution and metabolism of DEP and its active metabolite monoethyl phthalate (MEP) in different tissue compartments. Sensitivity analysis and Bayesian Markov chain Monte Carlo (MCMC) simulations were performed to evaluate the uncertainty and variability of the model parameters. The results suggest that dermal absorption is an important route of exposure to DEP in the environment.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Bangguo Wang, Lijing Wang, Wenxi Cen, Tao Lyu, Peter Jarvis, Yang Zhang, Yuanxun Zhang, Yinghui Han, Lei Wang, Gang Pan, Kaili Zhang, Wei Fan
Summary: This study investigates the feasibility and mechanisms of a chemical-free nanobubble-based AOP for treating organic micropollutants in water. The results show that the oxygen nanobubble AOP has a significantly higher removal efficiency compared to air and nitrogen nanobubbles. The treatment performance is not affected by pH and the presence of ions. Higher initial concentrations of the micropollutant lead to slower treatment processes, but similar removal performance is achieved in the end. The presence of organic matter reduces the removal rate of the micropollutant. The results have practical feasibility for water and wastewater treatment.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Yingmei Huang, Jicai Yi, Yao Huang, Songxiong Zhong, Bin Zhao, Jing Zhou, Yuxuan Wang, Yiwen Zhu, Yanhong Du, Fangbai Li
Summary: This study investigates the impact of biochar on methylmercury (MeHg) accumulation in rice. The results show that biochar reduces MeHg levels in paddy soils by decreasing bioavailable Hg and microbial Hg methylation. Additionally, biochar decreases the uptake and translocation of MeHg in rice plants, resulting in a reduction of MeHg accumulation in rice grains.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Nengde Zeng, Fei Huang, Jiani Du, Chenghao Huang, Qian Yang, Xinhua Zhan, Baoshan Xing
Summary: This study investigates the protein targets and protein-ligand interactions related to PAH contamination in crop xylem sap using computational tools. The results show that phenanthrene has a more pronounced effect on the xylem sap proteins of maize and wheat, with maize DEPs associated with lipid biosynthesis and wheat DEPs exhibiting an increase in ABC transporters. This study provides insights into the regulation and movement of PAHs within plant xylem.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Xinwei Chen, Hao Ma, Run Wang, Man Wang, Binbin Zhu, Yanqing Cong, Xiayue Zhu, Guoqin Wang, Yi Zhang
Summary: Co3O4/TiO2-NRs electrodes with excellent photoresponse were prepared via plasma-assisted modification of Co3O4 on TiO2. The combination of Co3O4 and TiO2 improved the light utilization efficiency and showed potential for degradation of pollutants.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Wenjing Ji, Liying Song, Jing Wang, Hongqing Song
Summary: This study conducted a life-cycle assessment to examine the correlation between natural gas consumption and carbon emissions in different end uses in China. The results showed that both natural gas consumption and life-cycle carbon emissions have been increasing since 2017. Significant variations in NG life-cycle carbon emissions were found across different provinces and sectors, highlighting the need for targeted efforts to reduce carbon emissions.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Youyi Chen, Boxuan Zhang, Pojun Zhang, Guogui Shi, Hao Liang, Wu Cai, Jingyu Gao, Sumin Zhuang, Kaiyin Luo, Jiaqi Zhu, Chaoxiang Chen, Kunyu Ma, Jinrong Chen, Chun Hu, Xueci Xing
Summary: The synergistic effects of trace sulfadiazine and cast-iron corrosion scales on the formation of disinfection by-products in drinking water distribution systems were investigated. The presence of magnetite resulted in increased concentrations of DBPs due to the higher microbial activity and enhanced microbial extracellular electron transport pathway. The study highlights the importance of considering trace antibiotics pollution and corrosion scales in water sources for DBP control.
ENVIRONMENTAL POLLUTION
(2024)
Review
Environmental Sciences
Bishwa Raj Pokharel, Vijay Sheri, Manoj Kumar, Zhiyong Zhang, Baohong Zhang
Summary: This review summarizes the interactions, uptake, and transport of aluminum nanoparticles (Al-NPs) in plants, highlighting their negative effects on plant growth and development, as well as their potential to alter plant defense systems and gene expression.
ENVIRONMENTAL POLLUTION
(2024)
Article
Environmental Sciences
Yonglu Wang, Fengsong Zhang, Xiaoyong Liao, Xiao Yang, Guixiang Zhang, Liyun Zhang, Chaojun Wei, Pengge Shi, Jiongxin Wen, Xiaorong Ju, Can Xu, Yang Liu, Ying Lan
Summary: This study aims to explore the effects of thiencarbazone-methyl center dot isoxaflutole on soil microflora and the potential mitigation mechanisms to bacterial communities. It was found that increasing the application of thiencarbazone-methyl center dot isoxaflutole resulted in increased stress on soil bacterial community structure and diversity. Increasing soil pH was recognized as a key factor in improving the diversity and structure of soil microflora. Supplemental use of nitrapyrin or modified attapulgite can increase soil pH and improve bacterial diversity.
ENVIRONMENTAL POLLUTION
(2024)