华东师范大学学报(自然科学版) ›› 2024, Vol. 2024 ›› Issue (6): 178-187.doi: 10.3969/j.issn.1000-5641.2024.06.015

• 生态风险与管控 • 上一篇    下一篇

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

杨静1(), 邬言1, 李月2, 刘霞1, 杨丁业1, 陈圆圆1, 金芮合1, 李晔1, 刘敏1,*()   

  1. 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
  • 收稿日期:2024-07-30 接受日期:2024-09-05 出版日期:2024-11-25 发布日期:2024-11-29
  • 通讯作者: 刘敏 E-mail:jyang@geo.ecnu.edu.cn;mliu@geo.ecnu.edu.cn
  • 作者简介:杨 静, 女, 工程师, 研究方向为新污染物环境行为及风险评估. E-mail: jyang@geo.ecnu.edu.cn
  • 基金资助:
    国家自然科学基金 (42230505, 41730646)

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

Jing YANG1(), Yan WU1, Yue LI2, Xia LIU1, Dingye YANG1, Yuanyuan CHEN1, Ruihe JIN1, Ye LI1, Min LIU1,*()   

  1. 1. Key Laboratory of Geographic Information Science (Ministry of Education), School of Geographic Sciences, East China Normal University, Shanghai 200241, China
    2. State Key Laboratory for Estuarine and Coastal Research, East China Normal University, Shanghai 200241, China
  • Received:2024-07-30 Accepted:2024-09-05 Online:2024-11-25 Published:2024-11-29
  • Contact: Min LIU E-mail:jyang@geo.ecnu.edu.cn;mliu@geo.ecnu.edu.cn

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.

关键词: 农田土壤, 六溴环十二烷, 空间分布, 健康风险评估

Abstract:

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 (∑HBCDs) ranged from 0.30 to 25.4 ng/g, with an average value of 1.78 ng/g. The ∑HBCDs in agricultural soils exhibited significant spatial variation, of which Baoshan District and Jiading District had notably higher average ∑HBCDs 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 α-, β- and γ-HBCD in Shanghai agricultural soils were 2.90% ~ 73.4%, 5.23% ~ 63.8%, and 6.95% ~ 85.5%, respectively. The proportion of γ-HBCD was lower in 91.2% of the sampling sites than in commercial products, indicating the presence of isomeric interconversion. Daily exposure to ∑HBCDs, 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.

Key words: agricultural soils, hexabromocyclododecane, spatial distribution, healthy risk assessment

中图分类号: