上海农田土壤中六溴环十二烷的赋存特征及健康风险评估  

Occurrence characteristics and healthy risk assessment of hexabromocyclododecane in agricultural soils in Shanghai

作　　者：杨静[1] 邬言 李月 刘霞[1] 杨丁业 陈圆圆[1] 金芮合 李晔[1] 刘敏[1] YANG Jing;WU Yan;LI Yue;LIU Xia;YANG Dingye;CHEN Yuanyuan;JIN Ruihe;LI Ye;LIU Min(Key Laboratory of Geographic Information Science(Ministry of Education),School of Geographic Sciences,East China Normal University,Shanghai 200241,China;State Key Laboratory for Estuarine and Coastal Research,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学地理科学学院地理信息科学教育部重点实验室,上海200241 [2]华东师范大学河口海岸学国家重点实验室,上海200241

出　　处：《华东师范大学学报（自然科学版）》2024年第6期178-187,共10页Journal of East China Normal University(Natural Science)

基　　金：国家自然科学基金(42230505,41730646)。

摘　　要：通过方差分析和风险商值(hazard quotient,HQ)法探究了上海34份农田土壤中六溴环十二烷(hexabromocyclododecane,HBCD)的空间分布特征和潜在健康风险.结果表明,所有样品中均检出了3种同系物(α-、β-和γ-HBCD),总HBCD浓度(∑HBCDs)范围为0.30~25.41 ng/g,算术均值为1.78 ng/g.各采样区∑HBCDs呈现明显的空间分异特征,其中,宝山区和嘉定区∑HBCDs的平均浓度显著高于其他行政区(p<0.05),推断HBCDs主要受工业源和道路源排放的共同影响.上海农田土壤中3种非对映异构体α-、β-和γ-HBCD占∑HBCDs的比例范围分别为2.90%~73.36%、5.23%~63.78%和6.95%~85.46%.91.2%的采样点处γ-HBCD占比低于商业产品中的比例,表明这些异构体之间存在相互转化.不同年龄人群∑HBCDs总的日暴露剂量变化范围为3.17×10^(–4)~1.57×10^(–1) ng/(kg·d),其中,婴儿暴露量最高,不同年龄人群经口摄入的日暴露剂量大于皮肤接触摄入.HQ结果表明,当前浓度水平下所有人群总摄入量基本无风险.The spatial distribution characteristics and potential health risks of hexabromocyclododecane(HBCD)in 34 farmland soils in Shanghai were investigated using the variance analysis and hazard quotient(HQ)methods.Three HBCD homologs(α-,β-and γ-HBCD)were detected in all samples.The total concentration of HBCD(ΣHBCDs)ranged from 0.30 to 25.4 ng/g,with an average value of 1.78 ng/g.TheΣHBCDs in agricultural soils exhibited significant spatial variation,of which Baoshan District and Jiading District had notably higher averageΣHBCDs compared to other areas(p<0.05).It was concluded that HBCDs mainly originated from the combined influence of industrial and vehicular emissions.The proportions of a-,b-and g-HBCD in Shanghai agricultural soils were 2.90%~73.4%,5.23%~63.8%,and 6.95%~85.5%,respectively.The proportion of g-HBCD was lower in 91.2%of the sampling sites than in commercial products,indicating the presence of isomeric interconversion.Daily exposure toΣHBCDs,combining oral and dermal ingestion,ranged from 3.17×10^(-4)to 1.57×10^(-1)ng/(kg·d),peaking in infants.Oral ingestion contributed more to daily exposure than dermal contact across age groups.The HQs indicated that the current HBCD concentrations posed a minimal risk to all populations.

关 键 词：农田土壤 六溴环十二烷 空间分布 健康风险评估 

分 类 号：X830[环境科学与工程—环境工程]