【摘要】 以实地土样分析检测结果和公开发表的研究资料数据为基础,开展广西壮族自治区重金属镉(Cd)的区域性分布特征与污染状况评价。讨论了5种功能类型土地土壤中Cd的含量现状,分析了土壤Cd含量的区域性分布特征,评估了Cd的土壤污染形势。结果表明:广西壮族自治区不同类型土地土壤中Cd均存在较高含量超标现象;Cd高含量地块以河池、崇左、百色、来宾、柳州、桂林等区域集中分布;土壤污染程度以中-重度污染为主(单因子污染指数P_i>2的点位比例达到60.20%),矿冶工业发达、自然地质背景高、人为活动影响强烈是造成全区土壤高Cd现象发生的主要原因。更多还原

【Abstract】 The regional distribution characteristics and contamination evaluation of heavy metal cadmium(Cd) in Guangxi Autonomous Region were carried out in this paper, based on analysis of soil samples and published research data. Specifically, content of Cd in five functional types of land soils was discussed, regional distribution characteristics of Cd content in soils were analyzed, and the soil pollution situation of Cd was evaluated. The results indicated that: the phenomenon of excessive Cd content was general in different functional land soils of Guangxi Autonomous Region; lands of high Cd content were mainly centralized in Hechi, Chongzuo, Baise, Laibin, Liuzhou and Guilin; degree of soil pollution(point location ratio of the single-factor pollution index P_i>2 reached 60.20 %) was dominated by moderate to severe pollution, and developed mining industry, high natural geological background and strong impacts of human activities were three key causes for high Cd content in the whole Autonomous Region’s soils.更多还原