The pollution level and enrichment characteristics of heavy metals in paddy soil-rice system in 5 counties and districts of Huai'an City
40 groups of rice and paddy soil samples were collected from five districts of Huai'an City(Huaiyin District,Huai'an District,Hongze District,Qingjiangpu District,and Lianshui County).The content of Pb、Cd、Cr、As and Hg were detected.The single factor pollution index method and Nemero comprehensive index method were used to analyze and evaluate the heavy metal content level in soil samples.The enrichment status of five heavy metals in rice was evaluated by the enrichment factor method.The results showed that the average content of five heavy metal elements in paddy soil and rice in Huai'an was within the national standard limit range.The single factor pollution index of Cd and As in paddy soil was high.The contents of Pb,Cd,Cr and As in soil and rice were weakly correlated.The concentration of Cd and As in rice was high.The accumulation of five heavy metals in the soil-rice system in the study area is low,and the study area is safe.
NETL
NSTL
万方数据
维普
