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Spatial distribution, environmental risks, and sources of potentially toxic elements in soils from a typical abandoned antimony smelting site

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Journal of Environmental Sciences 2023年第5期127卷 780-790页

作者： Shengguo Xue Ramon Korna Jiarong Fan Wenshun Ke Wei Lou Jinting Wang Feng Zhu School of Metallurgy and Environment Central South UniversityChangsha 410083China Hunan Hikee Environmental Technology CO. Ltd.Changsha 410001China

The rapid development of the smelting industry increases the release of antimony(Sb)into the soil environment,which threatens human health and ecosystems.A total of 87 samples were collected from an abandoned Sb smelting site to evaluate pollution characteristics and environmental risks of the potentially toxic elements(PTEs).The contents of As,Cu,Ni,Pb,Sb,and Zn in the fresh soils determined by P-XRF were 131,120,60,145,240,and 154 mg/kg,respectively,whilst following drying,grinding,and sieving pretreatments,the corresponding contents increased to 367,179,145,295,479,and 276 mg/kg,respectively.There was a significant correlation between the data obtained by P-XRF and ICP-OES in the treated samples,which showed the application feasibility of P-XRF.The average contents of Sb and As were 440.6 and 411.6 mg/kg,respectively,which exceeded the control values of the development land in GB 36600-2018.The ecological risk levels of the six PTEs decreased in the following order:As>Sb>Pb>Zn>Ni>Cu.Non-carcinogenic risk revealed that As,Pb,and Sb posed health risks for children,whilst for carcinogenic risk,the risk values for As and Ni were higher than the limit values for both children and adults.Anthropogenic sources accounted for more than 70.0%of As,Pb,and Sb concentrations in soils,indicating a significant influence on PTEs accumulation.The findings provide a basis for quick determination of the contamination characteristics and risk control of PTEs at Sb smelting sites.

关键词： Sb smelting sites P-XRF Spatial distribution Environmental risks sources apportionment

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Wet and dry deposition fluxes of heavy metals in Pearl River Delta Region(China):Characteristics,ecological risk assessment,and source apportionment

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Journal of Environmental Sciences 2018年第8期30卷 106-123页

作者： Lyumeng Ye Minjuan Huang Buqing Zhong Xuemei Wang Qiulan Tu Haoran Sun Chao Wang Luolin Wu Ming Chang School of Environmental Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China School of Atmospheric Sciences Sun Yat-Sen UniversityGuangzhou 510275China Institute for Environmental and Climate Research Jinan University Guangzhou 510632China

The atmospheric deposition of heavy metals poses serious risks to the ecological system and human health. To advance our knowledge of atmospheric dry/wet heavy metal deposition in the PRD region, monthly fluxes were examined based on soluble/insoluble fractions of five heavy metal elements（Cu, Pb, Cd, Cr and Zn） in samples collected from January 2014 to December 2015 at Guangzhou（urban） and Dinghushan（suburban） sites. The ratios of wet/dry deposition fluxes indicated that heavy metal deposition was governed by wet deposition rather than dry deposition in the PRD region. Affected by the shifting of the Asian monsoon, wet deposition fluxes exhibited significant seasonal variation between summer monsoon seasons（April to September） and winter monsoon seasons（October to February） in this region. Cd was classified as an extremely strong potential ecological risk based on solubility and the Hakanson ecological risk index. Source contributions to wet deposition were calculated by PMF, suggesting that dust, biomass burning, industries,vehicles, long-range transport and marine aerosol sources in Guangzhou, and Zn fertilizers,marine aerosol sources, agriculture, incense burning, biomass burning, vehicles and the ceramics industry in Dinghushan, were the potential sources of heavy metals.

关键词： Atmospheric dry/wet deposition Heavy metals Ecological risk assessment sources apportionment The Pearl River Delta region

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