贵州遵义农业区域土壤中重金属环境化学背景研究  

Environmental Geochemical Background Study of Heavy Metals in Soils in Zunyi Ag-ricultural Region of Guizhou

作　　者：任丹 杨冰 陈红亮[3] 汪盼利 陈恺 何锦林 谭红 

机构地区：[1]贵州省检测技术研究应用中心,贵州 贵阳 [2]贵州省分析测试研究院,贵州 贵阳 [3]安顺学院,贵州 安顺

出　　处：《环境保护前沿》2021年第2期143-155,共13页Advances in Environmental Protection

摘　　要：应用环境化地球学基线研究方法,识别区域尺度自然作用过程与人类活动影响,通过889个样品分析,表明该区域基线值分别为Hg:0.090;Cd:0.147;Pb:20.39;Cr:42.78;As:6.54 (mg/kg)。地质累积指数分析结果显示:1) Hg 24.07%为1级,60.74%为2级;2) Cd 13.84%为1级,80.54%为2级;3) Pb 46.42%为1级,43.97%为2级;4) Cr74.58%为1级,24.41%为2级;5) As 40.16%为1级,47.13%为2级。应用潜在生态危险分析,Hg大约有85%,Cd有70%,Pb、Cr、As三种元素有90%为1级和2级。应用地质累积频率法和潜在生态风险法估算,二者污染的趋势和污染程度结果一致。The environmental chemistry baseline research method was used to identify the natural process and anthropogenic influence at the regional scale. Statistical analysis of heavy metals in 889 sam-ples illustrated the baseline value of Hg, Cd, Pb, Cr, and As was 0.090 mg/kg, 0.147 mg/kg, 20.39 mg/kg, 42.78 mg/kg and 6.54 mg/kg respectively. The results of geoaccumulation index show that 1) class 1 accounts for 24.07% and class 2 accounts for 60.74% for Hg;2) class 1 accounts for 13.84% and class 2 accounts for 80.54% for Cd;3) class 1 accounts for 46.42% and class 2 accounts for 43.97% for Pb;4) class 1 accounts for 74.58% and class 2 accounts for 24.41% for Cr;5) class 1 accounts for40.16% and class 2 accounts for 47.13% for As. Meanwhile, the results of potential ecological risk assessment show a low risk of Hg, Cd, Pb, Cr and As accounting for 85%, 70%, 90%, 90% and 90%, respectively. The results showed that the regional soil environmental chemical background in Zunyi area by the methods of geoaccumulation frequency is consistent with the result of potential ecological risk assessment.

关 键 词：遵义农业土壤 重金属 含量特征 环境化学基线 

分 类 号：G63[文化科学—教育学]