Yuan Bo, Fu Jianjie, Wang Yawei, Jiang Guibin
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Institute of Environment and Health, Jianghan University, Wuhan 430056, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Environ Pollut. 2017 Jan;220(Pt A):608-615. doi: 10.1016/j.envpol.2016.10.009. Epub 2016 Oct 15.
Short-chain chlorinated paraffins (SCCPs) in multi-environmental matrices are studied in Taizhou, Zhejiang Province, China, which is a notorious e-waste dismantling area. The investigated matrices consist of paddy field soil, paddy seeds (Oryza sativa, separated into hulls and rice unpolished) and apple snails (Ampullariidae, inhabiting the paddy fields). The sampling area covered a 65-km radius around the contamination center. C and C are the two predominant homologue groups in the area, accounting for about 35.7% and 33.0% of total SCCPs, respectively. SCCPs in snails and hulls are generally higher than in soil samples (30.4-530 ng/g dw), and SCCPs in hulls are approximate five times higher than in corresponding rice samples (4.90-55.1 ng/g dw). Homologue pattern analysis indicates that paddy seeds (both hull and rice) tend to accumulate relatively high volatile SCCP homologues, especially the ones with shorter carbon chain length, while snails tend to accumulate relatively high lipophilic homologues, especially the ones with more substituted chlorines. SCCPs in both paddy seeds and snails are linearly related to those in the soil. The e-waste dismantling area, which covers a radius of approximate 20 km, shows higher pollution levels for SCCPs according to their spatial distribution in four matrices. The preliminary assessment indicates that SCCP levels in local soils pose no significant ecological risk for soil dwelling organisms, but higher risks from dietary exposure of SCCPs are suspected for people living in e-waste dismantling area.
在中国浙江省台州市（一个臭名昭著的电子垃圾拆解地区），对多环境基质中的短链氯化石蜡（SCCPs）展开了研究。所调查的基质包括稻田土壤、稻谷种子（水稻，分为谷壳和糙米）以及福寿螺（瓶螺科，栖息于稻田）。采样区域涵盖了污染中心周围半径65公里的范围。C和C是该区域两个主要的同系物组，分别占SCCPs总量的约35.7%和33.0%。福寿螺和谷壳中的SCCPs含量通常高于土壤样品（30.4 - 530纳克/克干重），谷壳中的SCCPs含量比相应的糙米样品（4.90 - 55.1纳克/克干重）高出约五倍。同系物模式分析表明，稻谷种子（谷壳和糙米）倾向于积累相对较高挥发性的SCCP同系物，尤其是碳链长度较短的那些，而福寿螺则倾向于积累相对较高亲脂性的同系物，尤其是氯取代更多的那些。稻田种子和福寿螺中的SCCPs与土壤中的SCCPs均呈线性相关。根据四种基质中SCCPs的空间分布，半径约20公里的电子垃圾拆解区域显示出更高的污染水平。初步评估表明，当地土壤中的SCCP水平对土壤栖息生物没有显著的生态风险，但怀疑生活在电子垃圾拆解区域的人群因饮食接触SCCPs面临更高风险。
