摘要目的 评估华南某电子垃圾拆解区周边住宅室内灰尘重金属对儿童的非致癌健康风险.方法 2016年10月,选取中国华南地区某电子垃圾拆解区周边A村作为研究场所,采用方便抽样抽取村庄内的36户住宅,利用真空吸尘器采集样品,共采集36份,测定每份样品中重金属As、Cd、Cr、Cu、Mn、Pb和Zn的浓度,并计算平均浓度值.分别采用美国环保署(EPA)推荐健康风险评估模型(HRA)、美国毒物与疾病登记署(ATSDR)的靶器官毒性剂量法(TTD)和二元证据权重分析(BINWOE)模型,评估室内灰尘中重金属对当地儿童的非致癌健康风险.结果 As、Cd、Cr、Cu、Mn、Pb和Zn的浓度值分别为(48.90±33.91)、(5.95±3.89)、(173.57±580.37)、(412.71±1 190.00)、(612.82±540.70)、(297.41 ±293.22)和(1 052.81±1 156.48)mg/kg,采用TTD和BINWOE模型得出的叠加风险(HI)值分别为2.670和2.933,分别是HRA模型叠加HI值(1.386)的1.93和2.12倍,均大于EPA推荐非致癌健康风险阈值(1.00).结论 华南某电子垃圾拆解区周边住宅室内灰尘重金属对当地儿童健康存在一定威胁.

abstractsObjective To evaluate the non-carcinogenic health risk of heavy metals (As,Cd,Cr,Cu,Mn,Pb and Zn) in residential indoor dust for young children around an e-waste dismantling area in South China.Methods A village around an e-waste dismantling area in South China was selected as a research site in October 2016.Convenience sampling method was used to select 36 houses in the village and 36 dust samples were collected by vacuum cleaner.The concentrations of heavy metals (Cd,Cr,Cu,Mn,Pb and Zn) in each sample were determined and expressed by the average value.Non-carcinogenic health risk assessment was conducted using the US Environmental Protection Agency (EPA) Health Risk Assessment (HRA) model,the American Toxicology and Disease Registry (ATSDR) Target-organ Toxicity Dose (TTD)approach and the ATSDR Binary Weight-of-Evidence (BINWOE) model.Results The mean ± SD of concentrations of As,Cd,Cr,Cu,Mn,Pb and Zn were (48.90± 33.91),(5.95 ± 3.89),(173.57 ± 580.37),(412.71±1 190.00),(612.82±540.70),(297.41±293.22) and (1 052.81±1 156.48) mg/kg,respectively.The HI value of TTD (2.670) and BINWOE (2.933) were higher than the safety threshold of EPA recommended non-carcinogenic health risk.The HI value of TTD and BINWOE were 1.93 and 2.12 times higher than the HI value of HRA (1.386).Conclusion There was non-carcinogenic health risk of heavy metals (As,Cd,Cr,Cu,Mn,Pb and Zn) via residential indoor dust around the e-waste dismantling area for local children.