摘要
利用粉煤灰除砷,考察碱洗和负载Fe(Ⅲ)氧化物等不同的改性方法对去除As(V)效果的影响.结果表明,经碱洗和Fe(Ⅲ)改性的粉煤灰吸附效果(平衡吸附量Qe>35 mg/g)明显强于未经改性的粉煤灰(平衡吸附量Qe<1 mg/g),在初始砷浓度为1 mg/L,pH值为中性的条件下,投加量为0.5 mg/L,24 h后砷的去除率达到90%以上,剩余砷浓度低于生活饮用水卫生标准规定的0.01 mg/L.
Fly ash was used to remove arsenate As（V） from water,and the effects of the modification methods on the As（V） adsorption capacity of fly ash was investigated,such as alkali lye soaking and coating with Fe（III） oxide.The results showed that after both two modification processes,the adsorption effect（Qe35 mg/g） was significantly better than the one（Qe1 mg/g） before modification.Additionally,when the initial concentration of As（V） was 1 g/L and adsorbent dosage was 0.5 mg/L,the arsenic removal efficiency could be higher than 90% after 24 h reaction at pH=7.Namely,the corresponding residual concentration of As（V） was lower than 0.01 mg/L,which complied with the drinking water health standards of China.
出处
《华北水利水电学院学报》
2011年第5期135-137,共3页
North China Institute of Water Conservancy and Hydroelectric Power
基金
水专项子课题:复合污染条件下含砷地下水强化除砷技术(2009ZX07424-002-004)
关键词
粉煤灰
砷
改性
吸附
fly ash
arsenic
modification
adsorption
