硫酸亚铁对粉煤灰中不同价态铬元素淋滤特性的影响  

Influence of ferrous sulfate on leaching characteristics of chromium with different chemical valences in coal fly ash

作　　者：吴乐[1] 刘哲[1] 史玲玲[1] 王鹏[2] 龚勋[2] 

机构地区：[1]广东电网公司电力科学研究院,广州510600 [2]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《环境工程学报》2015年第12期6054-6058,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51306062)

摘　　要：粉煤灰中痕量元素的滤出会对灰场下游的生态环境产生重要的影响,因而研究粉煤灰中痕量元素的淋滤特性具有重要的现实意义。针对贵州某电厂灰样,开展铬元素的迁移控制及柱淋滤特性的研究,建立HPLC-ICP-MS对不同价态铬定量分析的方法,结果显示,以EDTA为络合剂,经过高效液相色谱分离,Cr(Ⅲ)与Cr(Ⅵ)的保留时间分别为80 s和120 s左右,实现了基线分离。并选取硫酸亚铁,研究硫酸亚铁的添加对不同价态铬元素在柱淋滤系统内淋滤特性的影响。The leachability of trace elements in fly ash has significant impact on the surrounding ecological environment,thus the study of leaching characteristics of fly ash is very important. The ash samples from a coalfired power plant in Guizhou Province were applied in treatment for chromium stabilization and column leaching experiment. Advanced HPLC-ICP-MS analysis was used to quantitatively determine the different valence states of chromium. The results show a good separated baseline for Cr（ Ⅲ） and Cr（ Ⅵ） with retention time of 80 s and120 s after HPLC separation with aid of complex agent EDTA. The dilute ferrous sulfate solution was used to control the mobility of chromium in column leaching system.

关 键 词：煤粉灰 淋滤特性 铬 硫酸亚铁 

分 类 号：X752[环境科学与工程—环境工程]