化工学报2019，Vol.70Issue(9)：3511-3516,6.DOI:10.11949/0438-1157.20190454
pH调整剂对含砷酸性废水中氧化Fe(Ⅱ)共沉淀固砷行为的影响
Effect of pH adjustment on immobilization of arsenic by coprecipitation through oxidizing Fe(Ⅱ) in acidic wastewater containing arsenic
摘要
Abstract
In the process of catalytic oxidation of Fe(Ⅱ) co-precipitated arsenic by hydrogen peroxide, different pH adjustments were used to adjust the pH of the solution. The effects of different pH adjustments on the precipitation of arsenic in wastewater and the properties of precipitated slag were studied. The results show that the pH adjustments of Na2CO3 and CaO are beneficial to the removal of arsenic from wastewater, and the arsenic in the coprecipitates is mainly in the form of amorphous bulk particles. When Na2CO3 is used as the pH adjustment, it is most favorable to the growth of particle size, the size of precipitates is the largest, but the stability of arsenic is the worst, and it is easier to release from the slag. The particle size of the precipitates obtained by CaO is relatively small due to the existence of CaSO4 rod-like particles, but the existence form of arsenic is the most stable, and the fixation effect of arsenic is the best.关键词
砷/废水/固定化/pH调整剂/浸出毒性/环境Key words
arsenic/wastewater/immobilization/pH adjustment/leaching toxicity/environment分类
资源环境引用本文复制引用
王永良,杨晓玲,董永霞,杜英超,刘翔,韩培伟,叶树峰..pH调整剂对含砷酸性废水中氧化Fe(Ⅱ)共沉淀固砷行为的影响[J].化工学报,2019,70(9):3511-3516,6.基金项目
中国科学院重点部署项目(ZDRW-ZS-2018-1) （ZDRW-ZS-2018-1）
