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电子垃圾拆解地大气中二噁英、多氯联苯、多溴联苯醚的污染水平及相分配规律
  • 期刊名称：科学通报(Chinese Science Bulletin)
  • 时间：0
  • 页码：165-171
  • 语言：中文
  • 分类：X132[环境科学与工程—环境科学] O625.322[理学—有机化学;理学—化学]
  • 作者机构：[1]环境化学与生态毒理学国家重点实验室,中国科学院生态环境研究中心,北京100085
  • 相关基金：国家自然科学基金项目（批准号：20607025,20777079）和国家自然科学基金重大项目（批准号：20737003）资助
  • 相关项目：典型污染物的复合污染及生态毒理机制的研究
作者： 王璞|江桂斌|张庆华|王亚韡|李英明|
关键词： 二噁英, 多氯联苯, 多溴联苯醚, 大气, 气-粒分配, 电子垃圾
中文摘要：

研究了浙江台州电子垃圾拆解地大气中二噁英（PCDD／Fs）、多氯联苯（PCBs）、多溴联苯醚（PBDEs）的污染水平、分布特征和相分配规律．通过对3个采样点的研究发现，∑PCDD／Fs的浓度为2．91～50．6 pg·m^-3，其毒性当量为0．20～3．45 pg（I-TEQ）·m^-3，∑PCBs的浓度和毒性当量分别为4．23-11．35 ng·m^-3，0．050～0．859 pg（TEQ）·m^-3，∑PBDEs的浓度为92～3086 pg·m^-3，此3类污染物的浓度高于一般城市地区．研究结果显示二噁英主要分布在颗粒物相，而多氯联苯主要分布于大气中的气相．通过污染物的气（气相）-粒（颗粒物）分配系数（Kp）与蒸气压（PL^0）的关系式评价了污染物的气-粒分配行为．利用Junge-Pankow模型和Koa吸附模型预测了3类污染物在大气中的气-粒分配，并与实测值作了比较．结果表明，Junge-Pankow模型较好地预测了多氯联苯的气-粒分配，但是该模型较低地预测了二噁英在颗粒物上的组分，较高地预测了多溴联苯醚在颗粒物上的浓度．Koa吸附模型对于二噁英和多氯联苯的预测值与实测值较一致．

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