废弃电子垃圾拆解区仍然是多氯联苯的显著释放源
详细信息 查看官网全文
- 英文论文题名：The abandoned e-waste recycling site continued to act as a significant source of polychlorinated biphenyls
- 论文作者：王琰 ; 罗春玲 ; 张干
- 英文论文作者：Yan Wang ; C.Luo ; G.Zhang ; Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) ; School of Environmental Science and Technology ; Dalian University of Technology ; Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences
- 年：2016
- 作者机构：大连理工大学环境学院工业生态与环境工程教育部重点实验室;中国科学院广州地球化学研究所有机地球化学国家重点实验室;
- 论文关键词：电子垃圾 ; 多氯联苯 ; 逸度采样 ; 大气-土壤交换 ; 环境过程
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十六分会：环境化学
- 语种：中文
- 分类号：X705;X501
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十六分会 ; 环境化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：205k
- 原文格式：D
- 会议级别：全国
摘要
电子垃圾的拆解活动导致大量的多氯联苯(PCBs)等持久性有机污染物排入环境当中,其污染问题越来越引起人们的关注。虽然传统的焚烧等粗犷的回收方式被禁止,场地被废弃,但拆解区周围污染仍然很严重。我们分别在冬夏两季对废弃电子垃圾拆解区展开研究,分别采集了废弃焚烧区和非焚烧区的表层土壤,利用逸度采样器采集近地表和1.5m高度的大气样品。结果显示:表层土壤和大气中PCBs的浓度分别为39.8-940 ng/g和287-8280 pg/m3。该区域PCBs的浓度呈现季节性变化,土壤中PCBs冬季偏高,而大气中PCBs夏季偏高。我们基于逸度模型和逸度采样器两种方法对废弃拆解区PCBs的迁移趋势进行评估,结果显示逸度采样器原位测定的方法能够更准确的显示PCBs在该地区的迁移趋势。虽然已经被废弃多年,并且经过了简单的覆盖土壤等处理,废弃的电子垃圾拆解区仍然是该地区PCBs等污染物的重要的释放源。
The recycling of e-waste has attracted significant attention due to emissions of PCBs into the environment.We measured PCB concentrations in surface soils,air equilibrated with the soil,and air at 1.5-m height using a fugacity sampler in an abandoned electronic waste(e-waste) recycling site in South China.The total concentrations of PCBs in the soils and air were 39.8-940 ng/g and 287-8280 pg/m3,respectively.The PCB concentrations displayed seasonal variation;they were higher in winter in the soils and higher in summer in the air.We compared the traditional fugacity model and fugacity sampler for assessing the soil–air partition coefficients(Ksa) and the fugacity fractions of PCBs.The results suggested that the fugacity sampler provided more accurate Ksa values and trends in air-soil exchange.The abandoned e-waste burning site still acted as a significant source of PCBs years after the prohibition on open burning.
The recycling of e-waste has attracted significant attention due to emissions of PCBs into the environment.We measured PCB concentrations in surface soils,air equilibrated with the soil,and air at 1.5-m height using a fugacity sampler in an abandoned electronic waste(e-waste) recycling site in South China.The total concentrations of PCBs in the soils and air were 39.8-940 ng/g and 287-8280 pg/m3,respectively.The PCB concentrations displayed seasonal variation;they were higher in winter in the soils and higher in summer in the air.We compared the traditional fugacity model and fugacity sampler for assessing the soil–air partition coefficients(Ksa) and the fugacity fractions of PCBs.The results suggested that the fugacity sampler provided more accurate Ksa values and trends in air-soil exchange.The abandoned e-waste burning site still acted as a significant source of PCBs years after the prohibition on open burning.
引文