离子交换—还原沉淀耦合工艺处理含Cr(Ⅵ)废水试验研究  

Experimental research on the treatment of Cr(Ⅵ)-containing wastewater by coupling process of ion exchange-reduction precipitation

作　　者：曾君丽[1,2] 邵友元[2] 易筱筠[1] 

机构地区：[1]华南理工大学环境科学与工程学院.广东广州510006 [2]东莞理工学院化学与环境工程学院,广东东莞523808

出　　处：《工业水处理》2012年第11期43-47,共5页Industrial Water Treatment

基　　金：973国家重点基础研究发展计划项目(2010CB227306);国家自然科学基金项目(51176036);东莞市高等院校科研机构和医疗卫生科技计划拟资助项目(201108102037)

摘　　要：为了高效、低成本地处理含Cr(Ⅵ)废水,提出采用离子交换—还原沉淀耦合工艺处理该废水。结果表明,将质量浓度为100 mg/L的含Cr(Ⅵ)废水以20 mL/min连续10.5 h流经离子交换柱,Cr(Ⅵ)的吸附率高达99.9%;用5%NaOH溶液洗脱饱和的离子交换树脂,洗脱液含Cr(Ⅵ)高达6 918.7 mg/L。FeSO4.7H2O还原处理浓缩后的高浓度含Cr(Ⅵ)废水的最佳反应条件为pH≥7,反应时间30 min,搅拌速度100 r/min,FeSO4.7H2O投加量为理论投加量的1.2倍,此条件下Cr(Ⅵ)去除率高达99.7%。The coupling process of ion-exchange-reduction precipitation, has been carried out for treating the wastewater containing Cr（ VI ） with high efficiency and low cost. The results show that when the Cr（ VI ）-containing wastewater, whose mass concentration is 100 mg/L, is used for flowing through the ion exchange column continuously for 10.5 h ,with 20 mL/min ,the adsorbing rate of Cr （ VI ） is as high as 99.9%. 5% NaOH solution is used for eluting the saturated ion exchange resin. The Cr（ VI ） contained in eluting liquid is as high as 6 918.7 mg/L After the Cr （ VI ）-containing wastewater with high concentration is treated by FeSO4·7H2O reduction process. Under the following optimum reaction conditions：pH ≥7,reacfion time 30 min,stirring speed 100 r/rain,and FeSO4·7H2O 1.2 times of the theoretical amount, its Cr（ VI ） removing rate can be up to 99.7%. dosage of Key words： wastewater containing Cr （ VI ） ;ion exchange resin method ; ferrous sulfate ;reduction precipitation process

关 键 词：含Cr(Ⅵ)废水 离子交换树脂法 FeSO4·7H2O还原沉淀法 

分 类 号：TQ09[化学工程] X703.1[环境科学与工程—环境工程]