铁屑/CO_2体系处理含铬(Ⅵ)废水的研究  

Treatment of Chromium(Ⅵ)-containing Wastewater by Iron Scrap /CO_2 System

作　　者：艾恒雨[1] 韩璐[1] 卫博[1] 贾艳秋[1] 布日古德[1] 

机构地区：[1]哈尔滨理工大学化学与环境工程学院绿色化工技术黑龙江省高校重点实验室,黑龙江哈尔滨150040

出　　处：《中国给水排水》2013年第23期111-113,共3页China Water & Wastewater

基　　金：黑龙江省大学生创新创业训练计划项目(201210214012)

摘　　要：在铁屑还原废水中Cr(Ⅵ)的过程中,为避免引入Cl-等二次污染物和减缓设备腐蚀,用CO2替代HCl等强酸提供H+,考察对Cr(Ⅵ)的去除效果。结果表明,采用铁屑/CO2体系处理含铬(Ⅵ)废水是可行的,200 mL/min的CO2通入量足以使反应体系的pH值维持在5.2左右,在此条件下,当初始Cr(Ⅵ)浓度为100 mg/L、铁屑投加量为60 g/L、搅拌速度为50 r/min时,反应30 min后对Cr(Ⅵ)的去除率可达到97%。In order to avoid the introduction of Cl^-- and other secondary pollutants and slow down equipment corrosion, carbon dioxide instead of strong acid （HCl） was used to produce H ＋ during chromium （ VI ） reduction by iron scraps. It was found that the iron scrap/CO2 system was feasible in Cr（ Wl ） removal from wastewater. The flow rate of CO2 at 200 mL/min was sufficient to keep the pH at about 5.2. The Cr（ VI ） removal rate was 97% after 30 min of reaction when initial chromium （ VI ） concentration, iron scrap dosage and stirring rate were 100 mg/L, 60 g/L and 50 r/min respectively.

关 键 词：铁屑 CO2体系 含铬(VI)废水 CO2通入量 PH值 

分 类 号：X703[环境科学与工程—环境工程]