Article
Environmental Sciences
S. Kiran Kumar Reddy, Harish Gupta, Upendra Badimela, D. Venkat Reddy, Rama Mohan Kurakalva, Devender Kumar
Summary: The study investigated the POC contents of 70 sizeable tropical coastal rivers in the Western Ghats region of India, highlighting the significant influence of land-use, climate, and topography on the sources and transport characteristics of organic carbon.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Jing Bai, Jiansheng Qu
Summary: The paper estimated building stocks and building embodied carbon emissions in China's 31 provinces from 1997 to 2016 using material flow analysis. The results showed a significant increase in total emissions, with noticeable differences in growth rates between provinces and a spatial inclination of emissions decreasing from eastern coastal regions to western inland regions. The spatial agglomeration patterns were found to be complex and variable, with different driving forces identified for the increase and decrease in emissions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Xiaolong Jin, Xueliang Deng, Jian Chen, Song Zhu, Yanfeng Huo, Rui Dai, Qianqian Xu, Ming Cao, Yue Wu
Summary: With the help of satellite remote sensing, the study assessed the spatial and temporal patterns of atmospheric CO2 in China. The results showed a consistent increase in CO2 at all levels of the troposphere, with higher concentrations in the East and lower concentrations in the Northwest. The driving forces behind these variations were found to be primarily anthropogenic and biogenic activities at the near surface, while air motion played a dominant role at the upper troposphere.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Thermodynamics
Huadun Chen, Qianxi Du, Tengfei Huo, Peiran Liu, Weiguang Cai, Bingsheng Liu
Summary: This study innovatively explores the spatiotemporal patterns and driving mechanism of urban residential building sector carbon emissions (URBCE) in 30 provinces of China from 2000 to 2019. The results show that the majority of regions have experienced significant growth in URBCE, leading to a widening regional gap. The spatial pattern of URBCE is stable, with high values in the Northeast and North China, and low values in the Southwest. Factors such as urban residential building floor space per capita, population, and urbanization are promoting URBCE, while carbon intensity and energy intensity are increasingly inhibiting it. This study provides policymakers with a better understanding of URBCE and helps them develop regionally-specific emission reduction strategies. Additionally, it offers a fresh perspective on researching spatiotemporal disparities of carbon emissions in other sectors and nations, and has international significance.
Article
Engineering, Environmental
Weilu Kang, Xiangang Hu, Ruihong Feng, Changhong Wei, Fubo Yu
Summary: The study provides insights into the effects of land use on greenhouse gas emissions in rivers. The microbial composition and dissolved organic matter properties were found to be influenced by land use intensity and DOM chemical composition. Anthropogenic stressors played a significant role in chromophoric DOM, and DOM biodegradability was positively correlated with CDOM. The variations in CO2 and CH4 emissions were primarily governed by the biodegradation or photomineralization of dissolved organic carbon derived from autotrophic DOM, which was indirectly affected by land use through changes in DOM properties and water chemistry.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Yuwei Wang, Na Zhao
Summary: With global warming, heatwave-related disasters have increased, impacting the natural ecosystem and human society. This study analyzes the spatiotemporal variations in global human-perceived heatwaves and identifies driving factors. It emphasizes the importance of considering temperature, humidity, and various factors such as aspect, land use, and precipitation. The study provides insights for climate change adaptation and risk reduction strategies.
Article
Biodiversity Conservation
Yongyue Ji, Sidong Zeng, QingQing Tang, Lingyun Yan, Shengjun Wu, Yuanchao Fan, Jilong Chen
Summary: This study investigated the spatio-temporal variations and driving factors of ecosystem water use efficiency (WUEe) under different aridity conditions and across vegetation types in China. The results showed an increasing trend of WUEe in humid areas, with forest ecosystems having the highest WUEe followed by shrubland and cropland ecosystems. Leaf Area Index and vapor pressure deficit contributed the most to increases in WUEe, while air temperature contributed the most to WUEe decreases.
ECOLOGICAL INDICATORS
(2023)
Article
Soil Science
Enze Xie, Yanxia Zhang, Biao Huang, Yongcun Zhao, Xuezheng Shi, Wenyou Hu, Mingkai Qu
Summary: This study examined the spatiotemporal distribution of soil organic carbon (SOC) in three typical regions in southeastern China from 1981 to 2011. The results showed that topography, soil sand content, and carbon inputs were the main drivers of SOC variability in different regions. Significant increases in SOC storage were observed in some areas, while others experienced rapid decreases due to land use changes and carbon inputs.
SOIL & TILLAGE RESEARCH
(2021)
Article
Environmental Sciences
Xin Ye, Lun Dong, Lina Lv, Yuhang Shang
Summary: This study used Jixi as an example to quantitatively analyze the evolution pattern of mining cities using geographic information system and mathematical statistical analysis methods, revealing some regularities in the city's land and spatial patterns.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Remote Sensing
Ming Shen, Zhigang Cao, Kun Xue, Dong Liu, Tianci Qi, Jinge Ma, Hongtao Duan
Summary: This study analyzed the spatiotemporal patterns and driving factors of water clarity in lakes across Eastern China. It found that natural factors and human activities have comparable impacts on water clarity, with the dynamic sediment ratio having the highest influence. Seasonal variations in water clarity are linked to the East Asian monsoon climate.
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
(2022)
Article
Environmental Sciences
Xiansheng Liu, Xun Zhang, Bowen Jin, Hadiatullah Hadiatullah, Luyao Zhang, Pei Zhang, Tao Wang, Qihong Deng, Xavier Querol
Summary: This study examined the variability and source of carbonaceous aerosols in a typical northern Chinese city, finding differences in concentration based on season and time of day, and analyzed the influence of meteorological conditions on carbonaceous aerosols. The results contribute to a deeper understanding and comprehensive management of carbonaceous aerosol pollution.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Geosciences, Multidisciplinary
Sheng Zheng, Wenwen Tang
Summary: The study analyzed the spatiotemporal variations and driving factors of per capita carbon emissions in China, highlighting the spatial autocorrelation among provinces and the heterogeneity of driving factors. The results showed that per capita GDP, urbanization rate, and energy intensity are the main contributors to per capita carbon emissions, while foreign direct investment acts as a disincentive in most regions.
GEOMATICS NATURAL HAZARDS & RISK
(2022)
Article
Environmental Sciences
John Gardner, Tamlin Pavelsky, Simon Topp, Xiao Yang, Matthew R. Ross, Sagy Cohen
Summary: Humans have significantly disrupted the global sediment cycle, affecting river morphology and ecosystems. Based on satellite observations from 1984 to 2018, the RivSed database provides a spatially explicit view of river sediment, revealing declining trends in sediment concentration in 32% of US rivers. Most rivers show decreasing sediment concentration downstream, primarily due to large dams. Comparing observations with models, there are differences in longitudinal sediment concentration patterns. RivSed has important implications for river geomorphology and ecology, illustrating human impacts on US river corridors.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Weibin Huang, Fengqi Wu, Wanrui Han, Qinqin Li, Yingchun Han, Guoping Wang, Lu Feng, Xiaofei Li, Beifang Yang, Yaping Lei, Zhengyi Fan, Shiwu Xiong, Minghua Xin, Yabing Li, Zhanbiao Wang
Summary: This study analyzed the carbon footprint of cotton production in China and identified the main drivers of carbon emissions. It found that fertilizer, irrigation electricity, and agricultural film were significant factors at the micro level, while the economic factor played a key role at the macro level. Improving efficiency and ensuring high-quality development are effective strategies to reduce carbon emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Forestry
Zhiyong Qi, Shiming Li, Yong Pang, Guang Zheng, Dan Kong, Zengyuan Li
Summary: Assessing the changes in forest carbon stocks over time is crucial for understanding carbon dynamics and climate change mitigation. In this study, bi-temporal aerial laser scanning (ALS) data was used to quantitatively characterize the spatiotemporal variations in aboveground carbon density (ACD) in boreal natural forests. The results showed that the transferable model performed equivalently to the model fitted directly from field plots. The study also found that carbon dynamics were related to tree species, age groups, and topography, and the Gini coefficient was a reliable predictor of ACD changes.
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.