Legacies and health risks of heavy metals,polybrominated diphenyl ethers,and polychlorinated dibenzo-dioxins/furans at e-waste recycling sites in South China  

作　　者：Xu Zhao Wei Li Wei Wang Jingjing Liu Yunjiang Yu Yang Li Xichao Chen Yun Liu 

机构地区：[1]State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment,South China Institute of Environmental Sciences,Ministry of Environmental Protection of the People's Republic of China,Guangzhou 510655,China

出　　处：《Frontiers of Environmental Science & Engineering》2023年第7期1-10,共10页环境科学与工程前沿（英文）

基　　金：the National Key R&D Program of China(Nos.2018YFC1800304 and 2019YFC1805504).

摘　　要：Informal electronic-waste(e-waste)recycling sites pose substantial health risks to surrounding environments and populations,yet they are not properly regulated.In this study,the soil levels of copper,lead,cadmium,eight polybrominated diphenyl ethers(PBDEs),and 18 polychlorinated dibenzo-dioxins/furans(PCDD/Fs)were measured at two e-waste recycling sites in South China between 2014 and 2019.Both sites have been abandoned for natural restoration.Our results indicate that the mean Cd and PCDD/F levels at Site A in 2019 were higher than those recommended by current safety guidelines.Meanwhile,the highest exposure among children was 1.36×10^(−2)mg/(kg·d)for Cu,followed by 5.05×10^(−3)mg/(kg·d)for Pb,9.71 ng/(kg·d)for PBDEs,and 6.82 ng TEQ/(kg·d)for PCDD/Fs.Children were at elevated risk for health problem posed by Pb and Cu exposure at both sites(hazard quotient>1)and by PCDD/Fs at Site A.Further risk assessment was conducted on the target organs and endpoints of heavy metals and PCDD/Fs.The hazard index(HI)for the target organ mixed-risk of heavy metals was high(HI=1.27),as was that of PCDD/Fs(HI=1.66),which can disrupt endocrine function and pose a risk of reproductive toxicity in children.Owing to incomplete cleaning,contaminants persist in soils over long periods and may harm nearby environments and communities.Our study demonstrates that heavy metal,PBDE,and PCDD/F contamination have not yet been remediated,and intervention is needed to reduce pollution and associated risks in areas affected by e-waste.

关 键 词：E-WASTE Human health risk Organ risk Heavy metal toxicity PBDE PCDD/F 

分 类 号：O62[理学—有机化学]