古冶炼废渣急性毒性危害试验研究
Journal Title: Science Paper Online - Year 2009, Vol 4, Issue 11
Abstract
对古冶炼废渣中重金属进行总量分析，针对古冶炼废渣长久堆放后废渣浸出液的急性毒性进行探讨。结果表明: 废渣中残留重金属(Zn+Pb)平均含量高达6.97%，经几百年风化与雨水淋滤，其中1.71%以上的Zn+Pb已经释放到周围环境中。古冶炼废渣浸出能力减弱，废渣中Zn仅部分点位有极少量浸出，Pb的浸出量甚至在检出限以下，Cr和Cd也仅有少量浸出。根据急性毒性试验结果，样品采用限度试验法进行急性毒性试验。急性毒性试验结果表明废渣水浸液小鼠急性经口LD50（半数致死量）大于20 mL/kg•bw。在实验过程中小白鼠没有出现死亡，行为也未见异常，但小白鼠体重增长明显下降。实验结束时对小鼠作肝、肾脏解剖学检查，未发现肝、肾器官异常改变，与对照组比较无明显差异。说明古冶炼废重金属含量依然很高，虽然经长时间风化淋滤其浸出毒性降低，但是急性毒性危害仍然存在。
Authors and Affiliations
Dongwei Li, Anning He, Zhonghui Xu
Keywords
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