Effect of salinity on the precipitation of dissolved metals in the wastewater that produced during fly ash disposal

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Lv, Lina^1 ; Yang, Yanling^1 ; Tian, Junguo^1 ; Li, Yaojian^1 ; Li, Jun^1 ; Yan, Shengjun^1

China TianyingInc., No.268 Huanghai Road(west), Hai'an, Jiangsu province, China^1

关键词: Chemical precipitation method;    Dissolved metals;    Fly ash disposal;    Heavy metals removals;    NaCl concentration;    Residual concentrations;    Waste incineration plants;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/3/032012/pdf
DOI  :  10.1088/1755-1315/121/3/032012

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this study, a salinity wastewater was produced during the fly ash treatment in the waste incineration plant. Chemical precipitation method was applied for heavy metals removal in the salinity wastewater. The effect of salinity on the removal of dissolved heavy metal ions (Zn2+, Cu2+, Pb2+, Ni2+and Cd2+) was studied, especially on the removal of Pb2+and Cd2+. Because of the formation of [PbCl3]-and [PbCl4]2-complexes, the residual concentration of dissolved Pb2+increased from 0.02 mg/L to 4.08 mg/L, as the NaCl concentration increased from 0 % to 10 %. And the residual concentration of dissolved Cd2+increased from 0.02 mg/L to 1.39 mg/L, due to the formation of [CdCl3]-, [CdCl4]2-and [CdCl6]4-complexes.