摘要
通过扫描电子显微镜与X射线衍射仪分析、BCR法三步连续提取及元素化学分析,对铅锌冶炼废水处理后沉渣中重金属的赋存状态、环境活性进行研究。结果表明,沉渣中主要毒害元素为Zn、Pb、Mn、Cd和Cu,且以非晶态存在,其含量分别为62350、29530、7650、4530和830 mg/kg。渣中Zn和Cd酸可提取态所占比例较大,分别为37.72%和34.44%;Mn的可还原态相对含量很高,达到49.67%;Zn和Pb的可氧化态含量较高,分别占全量的34.16%、34.68%;Pb和Cu的残渣态含量较高,分别占全量的39.72%和61.69%。
The geochemical distribution,environmental availability and releasing mechanisms of heavy metals from the sedment about Pb-Zn smelting waste water treated were studied through scanning electron microscope analysis,X-ray diffraction analysis,three-stage BCR sequential extraction procedure and metals element chemical analysis.The results show that： the smelting mainly includes toxic metals of Zn,Pb,Mn,Cd and Cu,and also in slag of amorphous,they were 62350 mg/kg,29530 mg/kg,7650 mg/kg,4530 mg/kg and 830 mg/kg.Acid residue in Zn and Cd extractable proportion of larger proportion were 37.72% and 34.44;the content reduction of Mn were relatively high,reach to 49.67%;Zn and Pb were higher in the volume of Oxidizable,respectively accounting for the total of 34.16%,34.68%;Pb and Cu in the residual levels were higher,accounting for the amount of 39.72% and 61.69%.
出处
《中国环境监测》
CAS
CSCD
北大核心
2011年第5期32-35,共4页
Environmental Monitoring in China
基金
湖南省科技计划重点项目(2007SK2006)
国家水污染控制与治理重大专项(2009ZX07212~001-02-05)
关键词
铅锌冶炼废水
沉渣
基本特征
BCR法
环境活性
The waste water of lead-zinc smelting
Sediment
Basic characteristics
Three-stage BCR sequential extraction procedure
Environmental availability
