电镀污泥中重金属最佳浸出条件的实验研究

摘要

The methods for leaching heavy metals trom electroplating sludge were investigated and compared, lFinally, H2SO4 was selected as the leaching agent, and the optimal leaching conditions were also determined:particle size100 meshes, every 2 g of sludge is dissolved in 10 mL,pH value 1.5 of sulfuric acid solution, and oscillating time is 1.5 h under normal temperature.Under these conditions, maximum leaching rate of Cu, Ni, Zn and Cr can be obtained, which can reach more than 95 ％ for each of them, laying a better foundation for the sequent recovery process.%研究了电镀污泥中重金属的浸出方法,对几种常用的浸出剂进行对比实验,最终选定硫酸作为浸出荆,并确定最佳漫出工艺条件:污泥细度为100目,每2 g污泥溶解在10 mL、pH值为1.5的硫酸溶液中,常温下振荡1.5 h.在该奈件下,污泥中重金属Cu,Ni,Zn,Cr的浸出率最高,均迭95%以上,为后续回收工艺奠定了较好的基础.