摘要
通过BCR3态连续提取方法和Tessier 5步连续提取方法,对某废弃线路板中重金属的赋存形态进行研究.结果表明,BCR连续提取法对废弃线路板中重金属的提取率比Tessier连续提取方法高.废弃线路板中Cu、Pb、Zn和Ni各形态分布差别很大.BCR和Tessier连续提取方法结果均表明废弃线路板中Ni主要是以残渣态存在,对环境的污染风险小;而Pb和Zn主要以酸可提取态或者碳酸盐态和可交换态存在,在南方酸雨环境中容易溶出;BCR和Tessier连续提取方法对Cu的活性评价不一致,但是由于废弃线路板中Cu总量高,对环境的影响不可忽视.
The environmental availability of heavy metals from the waste printed circuit boards （PCBs） were studied through BCR＇s three-stage extraction procedures from EU and Tessier＇s five sequential extraction procedures. The results show that the heavy metal extraction rates with BCR＇s procedures are higher than that with Tessier＇ s from waste PCBs. There are significant differences in fraction distributions of heavy metals in PCBs. The speciation of Ni in the PCBs exists mainly in residual forms and has little effect on the environment. The percentage of acidic extractable forms with BCR＇s method and the total amount of exchangeable and carbonate which bound for Tessier＇s procedure of Pb and Zn are high, in the South China, the two metals are more easily released by acid rain. Acidic extractable forms of Cu is the main speciation in PCBs with BCR＇s extraction procedures, while the percentage of Fe-Mn oxides- bound of Cu is the highest with Tessier＇s procedures, though the result is not agree consistent, due to the high content of Cu in PCBs, the harm of Cu from PCBs could not be neglected.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2009年第9期2798-2803,共6页
Environmental Science
基金
国家自然科学基金项目(40803025)
上海同济高廷耀环保科技发展基金会项目
江苏省自然基金项目(BK2006169)
关键词
废弃线路板
重金属
化学形态
BCR法
Tessier法
printed circuit boards （PCBs）
heavy metal
chemical speeiation
BCR＇s extraction procedures
Tessier＇s sequential extraction procedures
