Article
Environmental Sciences
Tao Ma, Jijie Kong, Weidi Li, Xinying Cheng, Yueqing Zhang, Deyang Kong, Shaogui Yang, Shiyin Li, Limin Zhang, Huan He
Summary: This study conducted a systematic monitoring of NPAHs and PAHs in agricultural soils of the Taige Canal basin. The results showed that four-ring NPAHs and PAHs were predominant and mainly originated from vehicle exhaust emissions, coal combustion, and biomass combustion. The health risk posed by PAHs in soils was lower than that of NPAHs in the Taige Canal basin.
Article
Environmental Sciences
Haiyan Li, Zini Lai, Yanyi Zeng, Yuan Gao, Wanling Yang, Yongzhan Mai, Chao Wang
Summary: This study investigated the pollution characteristics, sources, and ecological risks of PAHs in surface sediments from the river networks and outlets of the Pearl River Delta. The results showed that PAHs in sediments were mainly derived from coke tar and liquid fossil fuel combustion, coal/wood combustion, and petroleum contamination. Ecological risks of PAHs were found to be at moderate levels in the Pearl River Delta, indicating the need for regular monitoring.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
Lulu Sun, Chaoba Lin, Zengxing Zhou, Fuying Zhang, Ming Xu, Peiyuan Jiao, Xuezhu Zhu, Xinping Yang, Hao Zhu
Summary: The main organic pollutants in the industrial soils of the Pearl River Delta region of China were polycyclic aromatic hydrocarbons (PAHs) and phthalate esters (PAEs). These organic pollutants affected the biomass and enzyme activities of soil microorganisms, as well as decreased microbial species diversity and abundance. Urease activity, actinomycetes biomass, and fungi biomass were identified as suitable biological indicators for evaluating the stress of organic pollutants.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Environmental Sciences
Chaobin Ren, Qianqian Zhang, Huiwei Wang, Yan Wang
Summary: PAH contamination in the groundwater of the Hutuo River Basin in Hebei Province, China, is mainly attributed to biomass combustion, with wood, coal, and gasoline sources contributing the most, followed by oil and diesel sources, and natural gas combustion. The concentration of PAHs in groundwater is influenced by land use, with varying pollution sources contributing differently in different areas. Results of this study provide valuable insights for the prevention and control of PAH contamination in groundwater in the region.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Bo Wu, Shuhai Guo, Jianing Wang
Summary: The study assessed the health risks posed by PAHs in areas with different population densities in the Shengli Oilfield in China, finding that crude oil, traffic, and residential emissions were major sources. Implementing pollution control policies can effectively reduce the carcinogenic risks associated with soil contamination.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Wenjing Shi, Hui Gong, Weiqi Zhou, Xuejun Tan, Chen Zhang, Xiaohu Dai
Summary: The objective of this study was to compare the distribution and ecological risk of PAHs in the sewage collection and treatment system of four cities in the middle and lower reaches of the Yangtze River. The results showed that the mean concentration of 16 sigma PAHs was higher in sewer sediments than in sewage sludge. The major sources of PAHs in sewage sludge were petroleum sources, coal tar, and coking activities, while PAHs in sewer sediments primarily came from wood combustion, automobile emissions, and diesel engine emissions. Both sewage sludge and sewer sediments had medium ecological risk based on the assessment of sigma PAHs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yan Li, Ning Li, Xiangling Zhang, Ke Liu, Zhenyi Jia, Genmei Wang
Summary: PAHs, particularly in lake sediments, pose a significant threat to human health and ecological security due to their persistence and high toxicity. The improved PMF-PC model showed high accuracy in numerical simulation and spatial distribution consistency of PAHs compared to existing receptor models. The contributions of different sources to PAHs in Taihu Lake sediments were determined, with fossil fuel sources being more concentrated near the shore.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Mengjie Zhao, Bing Tang, Liying Bin, Ping Li, Shaosong Huang, Fenglian Fu
Summary: This investigation studied the presence, distribution, and removal of polycyclic aromatic hydrocarbons (PAHs) in the textile wastewater treatment process in the Pearl River Delta Region, South China. The results showed that all 16 PAHs could be found in dissolved and adsorbed states, except for acenaphthylene in suspended solids. The different molecular weights of PAHs affected their distribution and removal. Higher molecular weight PAHs were easier to remove in the sedimentation step. These findings are important for assessing environmental risks.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Jun Ma, Yingang Lu, Ying Teng, Changyin Tan, Wenjie Ren, Xueying Cao
Summary: The purpose of this study was to identify the sources of polycyclic aromatic hydrocarbons (PAHs) in tobacco and soils and assess the potential risks of these PAHs to farmers. The concentrations of PAHs in the soil-tobacco system and the dominant sources of PAHs were determined. The carcinogenic and non-carcinogenic risks to farmers were also estimated.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Engineering, Environmental
Ruifei Li, Junlin Cai, Jiafeng Li, Zhenyu Wang, Peng Pei, Jin Zhang, Peter Krebs
Summary: The study revealed a decreasing trend in PAH concentrations, with seasonal periodic oscillations and higher pollution levels in winter. Vehicular emissions and coal combustion were identified as the main sources contributing to PAH concentrations and associated health risks, while the risks were determined to be low. Substitution of petroleum and coal with cleaner energy sources could help mitigate the impact of PAHs.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Yan Lin, Zhengnan Cen, Jinping Peng, Huimin Yu, Peng Huang, Qinghui Huang, Zhibo Lu, Mengyang Liu, Hongwei Ke, Minggang Cai
Summary: Due to its unique environment and geographic location, Svalbard has been identified as a potential pollution reservoir in the Arctic. This study found the presence of microplastics and polycyclic aromatic hydrocarbons (PAHs). Textile materials and fisheries-related debris were identified as possible sources of microplastics and anthropogenic particles. PAHs in soils were mainly derived from traffic emissions and diesel combustion from a local power plant, while ship emissions were the dominant source of PAHs in sediments. Anthropogenic input was confirmed to be higher in Ny-Alesund, while transportation through ocean currents may contribute to the higher abundance of microplastics in Rijpfjorden.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Yuting Chen, Bei Lai, Yixian Wei, Qiaowei Ma, Hairong Liang, Hui Yang, Ruifang Ye, Minjuan Zeng, Huanhuan Wang, Yao Wu, Xiaoshan Liu, Lianxian Guo, Huanwen Tang
Summary: This study focuses on the particulates-bound PAHs in the Songshan Lake Science and Technology Industrial Park in Dongguan, China, and their impact on cancer risk and cellular toxicity. The research reveals significant differences in PAHs concentrations between summer and winter, with higher cancer risks found in the adolescent group. Results from experiments conducted on human bronchial epithelial cells indicate that PAHs can increase the formation of ROS, induce DNA damage, and affect protein levels. Stable carbon isotope ratio analysis confirms that petroleum and fossil fuel combustion are major sources of PAHs. These findings highlight the importance of particulates-bound PAHs and suggest the need to develop alternative energy sources to reduce fossil fuel combustion.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Environmental
Yuxin Zhang, Haiyang Chen, Chang Liu, Ruihui Chen, Yeyao Wang, Yanguo Teng
Summary: A new integrated methodology framework was proposed for source apportionment and source-oriented risk evaluation of PAHs in soils of a typical cold region in Northeastern China. Two advanced receptor models, PMF and MCR-WALS, were employed to identify the main sources of soil PAHs and assess the health risks posed by them. The results showed that coal combustion and gasoline engine were the main contributors to soil PAHs, with negligible health risks for both adults and children. Source-oriented risk assessment indicated that coal combustion had the highest contribution to the total risk of PAHs in soils.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Thiloka Kariyawasam, Gregory S. Doran, Julia A. Howitt, Paul D. Prenzler
Summary: PAHs are harmful pollutants in the environment. Extraction and quantification are important steps to understand contamination and implement remediation. Traditional extraction methods have limitations and newer, more environmentally friendly methods are being explored.
Article
Biotechnology & Applied Microbiology
Savannah J. Volkoff, Daniel L. Rodriguez, David R. Singleton, Alexander W. McCumber, Michael D. Aitken, Jill R. Stewart, Claudia K. Gunsch
Summary: This study investigated the bacterial community of the Elizabeth River using both culture-based and culture-independent methods, and identified potential candidates for bioremediation of PAH contaminants. The results showed the presence of PAH-degrading bacteria in the sediment, and a divergence in the microbial community between highly contaminated and less contaminated sites. The study highlights the importance of both culture-based and culture-independent methods in identifying promising bacterial candidates for precision bioremediation.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Article
Soil Science
Enqing Hou, Dazhi Wen, Yuanwen Kuang, Jing Cong, Chengrong Chen, Xianjin He, Marijke Heenan, Hui Lu, Yuguang Zhang
Article
Soil Science
Enqing Hou, Songbo Tang, Chengrong Chen, Yuanwen Kuang, Xiankai Lu, Marijke Heenan, Dazhi Wen
Article
Biodiversity Conservation
Enqing Hou, Chengrong Chen, Yiqi Luo, Guoyi Zhou, Yuanwen Kuang, Yuguang Zhang, Marijke Heenan, Xiankai Lu, Dazhi Wen
GLOBAL CHANGE BIOLOGY
(2018)
Article
Plant Sciences
Yihua Xiao, Shirong Liu, Fuchun Tong, Bufeng Chen, Yuanwen Kuang
FRONTIERS IN PLANT SCIENCE
(2018)
Article
Biodiversity Conservation
Xiaofei Lu, Wendan Ren, Enqing Hou, Lingling Zhang, Dazhi Wen, Zhanfeng Liu, Yongbiao Lin, Jun Wang, Yuanwen Kuang
GLOBAL ECOLOGY AND CONSERVATION
(2019)
Article
Plant Sciences
Songbo Tang, Lingling Zhang, Hans Lambers, Wendan Ren, Xiaofei Lu, Enqing Hou, Shenglei Fu, Yuanwen Kuang
Summary: The study compared the effects of understorey nitrogen (UAN) and canopy nitrogen (CAN) addition on leaf traits of understorey plants in a subtropical evergreen forest. The results indicated significant differences in the effects of different addition methods on leaf traits, suggesting that understorey plants respond differently to UAN compared to atmospheric nitrogen deposition.
JOURNAL OF ECOLOGY
(2021)
Article
Ecology
Enqing Hou, Dazhi Wen, Lifen Jiang, Xianzhen Luo, Yuanwen Kuang, Xiankai Lu, Chengrong Chen, Keanan T. Allen, Xianjin He, Xingzhao Huang, Yiqi Luo
Summary: This study examined the global-scale latitudinal pattern of terrestrial phosphorus limitation by analyzing plant production responses to phosphorus additions at various sites worldwide. The observed phosphorus-addition effect varied greatly depending on fertilization regime and production measure, but the standardised effect was consistently positive and decreased significantly with latitude. The latitudinal gradient in the standardised phosphorus-addition effect was explained by various mechanisms involving substrate age, climate, vegetation type, edaphic properties, and biochemical machinery.
Article
Biodiversity Conservation
Xiaofei Lu, Enqing Hou, Jieyun Guo, Frank S. Gilliam, Jianlong Li, Songbo Tang, Yuanwen Kuang
Summary: The study highlights that nitrogen enrichment can increase the diameter of soil aggregates, proportion of macroaggregates, and affect macroaggregate C significantly; in addition, N enrichment can lead to soil acidification and is correlated with aggregate C. Despite the varied effects on soil aggregation depending on ecosystem type and fertilization regime, overall, it enhances the formation of soil aggregates and their sequestration of organic C.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Ecology
Songbo Tang, Jianfeng Liu, Hans Lambers, Lingling Zhang, Zhanfeng Liu, Yutong Lin, Yuanwen Kuang
Summary: The leaf traits of dominant plant species varied between karst and nonkarst forests, with some elements being influenced by habitat and others by species. The correlations among nitrogen, phosphorus, specific leaf area, carbon, construction costs, minerals, water-use efficiency, organic acids, and construction costs were independent of habitat and related to plant growth and carbon allocation. However, the correlations between construction costs and lipids, calcium and magnesium, and magnesium and water-use efficiency were habitat-dependent.
ECOLOGY AND EVOLUTION
(2021)
Article
Biodiversity Conservation
Xiaofei Lu, Frank S. Gilliam, Jieyun Guo, Enqing Hou, Yuanwen Kuang
Summary: The impact of nitrogen enrichment on soil carbon budgets in terrestrial ecosystems is mainly driven by nitrogen-induced soil acidification, rather than an increase in above-ground carbon inputs. The increase in soil organic carbon in terrestrial ecosystems is closely associated with decreased soil pH, which reduces carbon losses by limiting microbial degradation.
JOURNAL OF APPLIED ECOLOGY
(2022)
Article
Agronomy
Xiaofei Lu, Zhangfen Qin, Hans Lambers, Songbo Tang, Joeri Kaal, Enqing Hou, Yuanwen Kuang
Summary: The study found that nitrogen deposition affects plant silicon uptake and the silicon biocycle, leading to increased plant silicon accumulation and reduced soil silicon return.
Article
Agronomy
Yutong Lin, Yuan Lai, Songbo Tang, Zhangfen Qin, Jianfeng Liu, Fengfeng Kang, Yuanwen Kuang
Summary: Leaf elemental stoichiometry of Quercus species varies at genus-level across China and is influenced by both climatic and edaphic factors. Climate change may alter nutrient strategies and potentially shift the distribution range of these species.
Article
Environmental Sciences
Xiaofei Lu, Frank S. Gilliam, Xu Yue, Bin Wang, Yuanwen Kuang
Summary: Elevated atmospheric nitrogen deposition can increase terrestrial carbon sinks, but its persistence depends on how plant biomass and soil organic carbon respond to long-term nitrogen input.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Environmental Sciences
Dan Xi, Yihua Xiao, Abubakari Said Mgelwa, Yuanwen Kuang
Summary: Air quality issues caused by PM2.5-induced persistent extreme haze episodes have become increasingly serious in urban environments. This study focused on the water-soluble ionic characteristics and isotopic compositions and sources of NH4+ and NO3- in PM2.5 aerosol samples collected in Guangzhou, China. The study suggests the importance of reducing NH3 and NOx from combustion-related processes and highlights the role of delta O-18-NO3- analysis in exploring variations of nitrate formation pathways in urban atmospheres.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Luhui Kuang, Zhijian Mou, Yue Li, Xiaofei Lu, Yuanwen Kuang, Jun Wang, Faming Wang, Xi'an Cai, Wei Zhang, Shenglei Fu, Dafeng Hui, Hans Lambers, Jordi Sardans, Josep Penuelas, Hai Ren, Zhanfeng Liu
Summary: Canopies play a crucial role in redistributing nitrogen in forest ecosystems, and not considering their influence can lead to biased estimates of the ecological consequences of human-induced nitrogen deposition. This study investigated the effects of different approaches and levels of nitrogen addition on microbial residual carbon (MRC) accumulation in a tropical forest. Results showed that the response of MRC to nitrogen addition varied with soil depth, with contrasting effects in the topsoil and subsoil. Understory nitrogen addition had greater effects on MRC accumulation compared to canopy nitrogen addition. These findings highlight the important role of canopies in mitigating the impacts of nitrogen deposition on soil carbon cycling in tropical forests and the need for further research on depth-dependent response mechanisms.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
