河南省桐柏-泌阳地区表层土壤钒和钴的分布特征及健康风险评价  

Distribution characteristics and health risk assessment of vanadium and cobalt in surface soil of the Tongbai-Biyang Area, Henan Province

作　　者：赖书雅 董秋瑶[1,2] 宋超 杨振京[1,2,3] 严明疆 LAI Shuya;DONG Qiuyao;SONG Chao;YANG Zhenjing;YAN Mingjiang(Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050061,Hebei,China;Key Laboratory of Quaternary Chronology and Hydro-environmental Evolution,China Geological Survey,Shijiazhuang 050061,Hebei,China;College of Resources,Hebei GEO University,Shijiazhuang 050031,Hebei,China)

机构地区：[1]中国地质科学院水文地质环境地质研究所,河北石家庄050061 [2]中国地质调查局第四纪年代学与水文环境演变重点实验室,河北石家庄0500612 [3]河北地质大学地球科学学院,河北石家庄050031

出　　处：《中国地质》2023年第1期222-236,共15页Geology in China

基　　金：中国地质调查项目(DD20190532)资助。

摘　　要：【研究目的】为了查明桐柏—泌阳地区表层土壤(0~20 cm)中2种重金属钒和钴的污染状况,采集表层土壤样品5521件,分析测定重金属V和Co的含量。【研究方法】运用单因子指数法、地累计指数法和人体健康风险评价方法,对土壤中V和Co的分布特征、生态风险、健康风险和影响因素进行研究。【研究结果】研究区内土壤V和Co空间分布呈片状分布,含量高值区主要分布在研究区南部。单因子污染指数和地累积指数评价中,Co元素总体污染样点比V元素多,且均存在复合污染的样点。人体健康风险评价结果显示成人的风险要大于儿童。成人中V非致癌风险指数均超过1;99.06%样品中V的儿童非致癌风险高于1;非致癌风险传播途径主要以呼吸吸入为主。存在32.95%样品Co对成人的非致癌风险为不可接受,存在19.74%样品Co对儿童的非致癌风险为不可接受。成人与儿童的致癌风险指数均在可接受的范围内。成人与儿童的非致癌风险和致癌风险指数高值区均分在研究区南部。【结论】土壤V和Co含量的高低不仅受土壤黏粒、pH值和铁、锰氧化物的影响,还受人类活动的影响。研究区矿产资源开采可能是该地区土壤V和Co污染和健康风险的主要原因。This paper is the result of ecological geological survey engineering.[Objective] In order to find out the pollution status of two heavy metals vanadium and cobalt in the surface soil(0-20 cm) in Tongbai-Biyang area, 5521 topsoil samples were collected to analyze and determine the content of heavy metals V and Co. [Methods] The distribution characteristics, ecological risk, health risk and influencing factors of V and Co in soil were studied by using the single-factor index method, geoaccumulation index method and human health risk assessment method. [Results] The results show that the V and Co in the study area were distributed in patches, and the area with high V and Co content was mainly in the south of the area. By assessing the single-factor pollution index and the geo-accumulation index, we found that there were more Co samples than V ones, and some samples had both elements. The human health risk assessment results show that adults are at a higher risk than children. The non-carcinogenic risk index of all V samples for adults was more than 1, while 99.06% of that for children was more than 1. The main route of non-carcinogenic risk transmission was through respiratory inhalation. 32.95% of Co samples for adults were deemed not acceptable regarding non-carcinogenic risk, while the figure for children was 19.74%. The carcinogenic risk indexes for both adults and children were within acceptable ranges. And the southern part of the area presented high non-carcinogenic and carcinogenic risk indexes for adults and children. [Conclusions] The content of V and Co in soil was affected by not only soil clay, pH value as well as iron and manganese oxides, but also human activities. Mining in the study area may be the main cause of V and Co soil pollution and health risks.

关 键 词：土壤钒钴 分布特征 污染评价 健康风险评价 影响因素 环境地质调查工程 桐柏 泌阳 河南省 

分 类 号：X53[环境科学与工程—环境工程] X820.4