污泥原位固化处理后的重金属形态变化研究

原位固化技术对于大规模的弃置污泥处理具有一定的技术经济优势,但是处理后的污泥中的重金属是否能够实现稳定化尚不明确。通过某污泥原位固化处理工程,采用Tessier 5步提取法研究了固化污泥中重金属形态随固化剂添加量以及固化龄期的变化规律。结果表明,随着固化剂添加量的增加,Cu、Zn的稳定态显著增加,但是Pb的稳定态变化不明显;随着固化龄期的增加,三种重金属的稳定态都在增加。

Research on heavy metals speciation under in-situ solidification technology of sewage sludge

A technical and economic advantage was very obvious when the in-situ solidification technology was used in discard sewage sludge. It was not clear whether the heavy metals were stabilized or not. The method of Tessier was used to study the heavy metals speciation under different solidified materials content and solidified period. The result showed that the stabilization speciation of Cu and Zn were increased, and the stabilization speciation of Pb was not obvious. Moreover, the stabilization speciation of Cu, Zn and Pb were increase with the stabilization period lengthened.