摘要
采用GC/MS法测定了广东清远龙塘镇电子垃圾拆解区电子垃圾、电子垃圾焚烧后残渣、当地池塘沉积物和对照区沉积物24种短链氯化石蜡(SCCPs)、24种中链氯化石蜡(MCCPs)和29种多氯联苯(PCBs)的浓度水平.结果显示,氯化石蜡(CPs)和PCBs大量存在于电子垃圾中.电子垃圾、残渣和池塘沉积物SCCPs和MCCPs浓度范围(干重)分别为1.6—46.8μg·g-1和7.3—215μg·g-1,PCBs的浓度范围(干重)为0.15—370.6μg·g-1,明显高于对照区,对周边造成了极大环境风险.SCCPs、MCCPs和PCBs均呈现低碳低氯同系物的相对含量在电子垃圾、电子垃圾焚烧残渣、拆解区池塘沉积物、对照区沉积物中依次递增的现象,表明CPs和PCBs在由电子垃圾向沉积物迁移过程中可能存在脱碳脱氯的降解过程.
The concentration level of short-chain and medium-chain chlorinated paraffins （SCCPs and MCCPs ） and polychlorinated biphenyls （PCBs） in e-wastes, incineration residues, and sediments from the electronic waste recycling areas of Qingyuan, Guangdong Province were determined using gas chromatographic-mass spectrometric （GC/MS）. The results showed that electronic waste dismantling activities were important sources of CPs and PCBs contamination, which was obviously higher than that in the reference region. SCCPs concentrations in the electronic wastes, the residues and pond sediments were in the range of 1.6--46.8 μg·g^-1, MCCPs 7.3-- 215μg·g^-1 and PCBs 0.15--370.6μg·g^-1 respectively. The concentrations were significantly higher than the reference area, which might impose risk on the surrounding environment. The relative contents of low carbon and low chlorine homologue increased from electronic wastes, electronic waste incineration residues, to the dismantling pond sediments, which indicated that decarbonization and dechlorination of the CPs and PCBs might develop during their migration from the electronic waste polluted area to the sediment.
出处
《环境化学》
CAS
CSCD
北大核心
2015年第7期1297-1303,共7页
Environmental Chemistry
基金
国家质检总局项目(2013KQ284)
佛山市标准战略项目(2012B01002)资助
关键词
氯化石蜡
多氯联苯
电子垃圾
残渣
沉积物.
chlorinated paraffins, polychlorinated biphenyls, e-waste, sediment, residue.
