摘要
为研究污泥中Cr、Cd的形态与其pH值的关系,本文取样进行了相关试验。通过试验结果,得出如下结论:污泥溶液pH值对重金属Cr、Cd形态及其转化有重要影响。重金属Cr在污泥溶液中主要以残渣态为主,氧化态和还原态基本随着pH值的升高而有所增加,Cr的交换态含量都很低,并随着pH值的升高而降低;Cd的氧化态基本随pH值的提高而增加,酸溶态/交换态含量随pH值的提高而降低。
In order to analyze the relationship of transformations of Cr and Cd in municipal sludge with pH, a series of rele- vant experiments have been done. The conclusions has been drawn as follows： the pH value of sludge solution has an impor- tant influence on the transformation of Cr and Cd. Residual fraction is the main one of Cr in sludge solutions, but the per- centage of exchangeable fraction is low in sludge solutin. The percentage of oxidation fraction and reducible fraction increases while pH of solution rises, yet the performance of exchangeable fraction is low and it reduces with the increase of pH. To the variation of fractions of Cd in sludge solutions, the percentage of oxidation fraction is amplified,but acid soluble/exchangeable fraction lowered with the increase of pH.
出处
《工业安全与环保》
北大核心
2012年第12期66-68,共3页
Industrial Safety and Environmental Protection
基金
苏州科技学院校基金项目(XKY201008)
