Spatial Distribution of Mercury (Hg) Concentration in Agricultural Soil and Its Risk Assessment on Food Safety in China

Sustainability

Dongmei Chen¹  Xiuying Zhang²  Shanqian Wang³  Taiyang Zhong³ 

[1] Department of Geography and Planning, Queen’s University, Kingston, ON K7L 3N6, Canada;Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing 210093, China;School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China;

关键词: Hg concentrations;    food safety;    agricultural soil;    land uses;    China;   

DOI  :  10.3390/su8080795

来源: DOAJ

【 摘 要 】

Soil mercury (Hg) pollution in some areas of China is a serious problem and has aroused a lot of attention on a local scale. However, there are few studies on Hg pollution on a national scale. This study collected 444 published papers during 2005–2015 on Hg concentrations in agricultural soil throughout China, under seven land uses, namely: dry land, paddy field, vegetable field, tea garden, orchard, traditional Chinese medicine field and tobacco field, to assess the spatial distribution of Hg concentration and evaluate its influence on food safety. The averaged Hg concentration (0.108 mg/kg) was higher than its background (0.065 mg/kg), but much lower than the guidelines (GB15618-1995 II) for crop production. The spatial distribution of Hg throughout China showed great variability, with some hotspots due to Hg related mining and smelting activities. According to the Environment Quality Standard for soil in China (GB15618-1995 II), 4.2% of agricultural soil should be abandoned due to Hg pollution, and 2.0% faced a high risk of Hg pollution.

【 授权许可】

Unknown