Keywords
Mining Areas, Soil, Vegetables, Rice, Heavy Metals
Abstract
Taking the cultivated land soil around a mining area in Guangxi and the vegetables and rice grown on it as the research object, a total of 23 dryland soil samples and 16 paddy field soil samples were collected, and 23 vegetable samples and 16 rice samples were collected at corresponding points for analysis. The content characteristics of the five heavy metals Cd, Hg, As, Pb, and Sb in the obtained samples and the relationship between heavy metals in soil and agricultural products. The results are as follows (1) Dryland heavy metals in the study area (excluding control areas) (mean value) Pb77.9¡À23.5-933 ¡À723mg¡¤kg-1, Sb27.8¡À15.3-398¡À366mg¡¤kg-1, Cd2.95¡À1.8-32.5¡À48.3mg¡¤kg-1, As64.9¡À58.7-837¡À674mg¡¤kg-1, Hg0.17¡À0.1¡ª0.57¡À0.69mg¡¤kg-1. Heavy metals in paddy fields (mean) Pb62.4¡À33.3¡ª603¡À416mg¡¤kg-1, Sb54.8¡À46.2¡ª307¡À205mg¡¤kg-1, Cd1. 04¡À0.55¡ª3.83¡À1.84mg¡¤kg-1, As30.2¡À22.6¡ª247¡À118mg¡¤kg-1, Hg0.13¡À0.04¡ª0.35¡À0.11mg¡¤kg-1. (2) Cd in vegetables and rice The enrichment factor is higher than Hg, As, Pb, and Sb. pH has an important influence on the migration of Cd in rice vegetables, and lower pH will promote its migration into vegetable rice.
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Original research done by Zhang Hailong, Li Xiangping, Hu Guocheng, Chen Yongheng, Qi Jianying
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