THE CURRENT STATUS OF HEAVY METAL(LOID) POLLUTION IN CULTIVATED LAND IN CHINA AND ANALYSIS OF THE HUMAN POLLUTION SOURCES

This article gathered the existing literature (2008-2018) that includes survey data of heavy metal(loid) pollution in cultivated land in China (except for Hong Kong, Macao and Taiwan), and comprehensively evaluated the accumulation of seven heavy metal(loid)s including Cd, Pb, Cr, Hg, As, Cu, and Ni, in the topsoil of cultivated land in China and the human pollution sources. The results showed cultivated land of 12 provinces/regions, including Shanxi, Gansu, Xinjiang, Guangdong, Hainan, Hunan, Henan, Zhejiang, Beijing, Shanxi, Jilin and Sichuan are polluted by heavy metal(loid)s in China, with more serious for Shanxi, Gansu, Xinjiang, Guangdong, and Hunan. The primary pollutants in cultivated soil are Cd and Hg, and the pollution resulting from these two elements in nine and five provinces/regions, respectively, is above the moderate level. The anthropogenic sources of heavy metal(loid) include industrial and mining enterprises, urban construction, transportation and vehicles, waste disposal, and agricultural production, etc. The pollution degree is as follows: mining > electronic waste dismantling processes > urban construction > industrial enterprises > suburban activities > transportation and vehicles > domestic waste disposal > (greenhouse) vegetable production > livestock and poultry.