【摘要】 对广西宜州市土壤重金属元素地球化学特征与富集规律的研究表明,研究区土壤以镉(Cd)污染为主,成土母质是土壤Cd的主要来源,大气干湿沉降、灌溉水、化肥及人类活动等在一定程度上影响了土壤环境质量。全区土壤环境质量综合等级为一等的土壤占比为26.67%,四等和五等的土壤占比达到了47.07%,土壤环境综合质量总体一般。土壤重金属元素形态分析显示:As、Hg、Pb、Cr主要以惰性态为主,而Cd的易利用态和中等利用态分配比率分别占到了21.6%和46.6%,活性很强,是土壤Cd污染的主要内因。更多还原

【Abstract】 Geochemical characteristics of soil heavy metal elements and their enrichment regularity in Yizhou city of Guangxi were studied.The results of the study showed that it was mainly characterized by the pollution of Cd in the study area,soil parent material was the main source of soil Cd.Atmospheric deposition,irrigation water,fertilizer and human activities also affected soil environmental quality to a certain extent.The overall comprehensive quality of the soil environment was in a general level,in which the proportion of soil in first grade accounted for 26.67%,fourth and fifth grades accounted for 47.07%.The analysis of occurrence state of heavy metals in soil showed that As,Hg,Pb and Cr elements were mainly inert state,while the activity of Cd element was stronger—which had the allocation ratios of easy-to-use state of 21.6%and mediumto-use state 46.6%.This was the main internal cause of soil Cd pollution.更多还原