摘要
以石灰-铁盐混凝沉淀法处理硫酸生产含砷废水,考察氧化还原电位（ORP）、曝气时间、pH及铁砷比的变化和影响.结果表明,砷去除率趋势与ORP基本一致,ORP可作为参考砷去除率的控制影响因素;一级处理pH 8～9,ORP 15 mV,铁砷比3,砷去除率达96％以上;二级处理pH 8～9,ORP 0 mV,铁砷比20,砷去除率达到60％以上.
Lime milk and ferric salt were used to treat arsenical wastewater from sulphuric acid production. The effect of oxidation-reduction potential（ORP）, aeration time, pH and The proportion of ferric salt and arsenic（Fe/As） was studied. The results show that ORP can be used as controlling factor in removal of arsenic. The removal rate of arsenic in primary treatment is more than 96 % with pH 8-9, ORP 15 mV and Fe/As 3. The removal rate of arsenic in secondary treatment is more than 60 % with pH 8-9, ORP 0 mV and Fe/As 20.
出处
《广东化工》
CAS
2014年第3期56-57,共2页
Guangdong Chemical Industry
关键词
硫酸生产
含砷废水
氧化还原电位
砷去除率
sulfuric acid production： arsenical wastewater
oxidation-reduction potential： removal rate of arsenic
