| 摘要: |
| 以江苏省某示范企业为例，对废线路板退锡和粉碎2个处理阶段的有组织、无组织废气以及废线路板处理余物中的持久性有毒物质（PTS）进行检测，并对其环境释放特征进行分析。结果表明，退锡阶段无组织废气中氯代二噁英类物质的浓度显著高于有组织废气，粉碎阶段有机和无机PTS浓度均高于退锡阶段，无机PTS的环境释放主要为悬浮颗粒物中的Pb、Cd、Cr及其化合物。通过PTS物质流分析可知，无机PTS释放质量分数（0.0%～22.0%）高于有机PTS释放质量分数（0.0%～1.0%），在金属和非金属粉末中含有大量的有机PTS。提出，采用自动化设施，减少工人的车间工作时间，降低其职业暴露风险，并关注废线路板处理余物的后续使用与处理。 |
| 关键词: 废线路板 回收处理 持久性有毒物质 环境释放特征 |
| DOI： |
| 分类号:X76 |
| 文献标识码:B |
| 基金项目:全球环境基金项目资助（5044）; 江苏省环保科研课题基金项目资助（2017001）;江苏省环境监测科研基金项目资助（1317） |
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| Environmental Release Characteristic of PTS in Waste Circuit Board Treatment Process |
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MAO Jia-di，MA Wei-yu，WU Jun-lian，WANG Ling-ling，YU Nan-yang，WEI Si1,2
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1.State Key Laboratory of Pollution Control and Resource Reuse， School of Environment， Nanjing University， Nanjing,Jiangsu 210093，China;2.Jiangsu Provincial Solid Waste Supervision and Management Center， Nanjing,Jiangsu 210036，China
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| Abstract: |
| This study takes one standard enterprise in Jiangsu Province as an example to analyze the environmental release characteristic of persistent toxic substance (PTS) in organized emission， unorganized emission and electronic waste residue during the treatment of waste circuit boards by detecting their concentration. The results showed that the concentration of chlorinated dioxins in the unorganized emission was significantly higher than that in the organized emission. In addition， the concentration of organic and inorganic PTS in the grinding technique is higher than that in the de stannous technique. Among them， inorganic PTS is mainly composed of Pb， Cd， Cr and their compounds in suspended particulate matter. According to PTS material flow analysis， the release ratio of inorganic PTS (0.0%～22.0%) is higher than that of organic PTS (0.0%～1.0%). Unfortunately， a large amount of organic PTS remains in metal and non metal powders. Therefore， further attention needs to be paid to the subsequent use and processing of waste circuit board processing residues. Moreover， it is proposed to use automated facilities to reduce the workers workshop time to reduce the risk of occupational exposure. |
| Key words: Waste circuit board Recovery treatment Persistent Toxic Substance Environmental release characteristic |
