摘要
PB法和Central Composite Design(CCD)法对电絮凝除As(Ⅲ)的影响因素进行筛选优化,建立以As(Ⅲ)去除率为目标响应值的模型,研究各因素影响,确定优化反应条件。结果表明,电絮凝除As(Ⅲ)影响显著的因素是:反应时间、电流、溶液初始pH及初始As(Ⅲ)含量;优化反应条件:反应时间9.91 min、电流0.31 A、溶液初始pH为6.94、初始As(Ⅲ)的质量浓度19.89 mg/L,在此条件下,As(Ⅲ)的实测去除率达98.8%,出水As(Ⅲ)的质量浓度为0.24 mg/L,达到GB 8978-1996排放要求。
Plackett-burman （PB） design and central composite design （CCD） were applied to optimize 7 factors for the arsenic remove by electrocoagulation. The effects of main influencing factors on arsenic removal by electrocoagulation were studied and the operational conditions were optimized. The result indicated that reaction time, current, initial arsenic concentration, and initial pH were the keZ factors. The optimal operational conditions were as follows： reaction time 9.91 rain, current 0.31 A, initial pH 6.94 and initial concentration 19.89 mg/L. Under these conditions, the arsenic removal rate was 98.8% and the arsenic concentration was 0.24 rag/L, which achieves the integrated wastewater discharge standard （GB 8978-- 1996）.
出处
《水处理技术》
CAS
CSCD
北大核心
2014年第1期47-51,55,共6页
Technology of Water Treatment
基金
国家十一五"水体污染控制与治理"科技重大专项增补课题(2010ZX07212-008)
湖南省科技厅社会发展科技支撑计划重点项目(2011SK2016)
湖南省高校创新平台(重金属污染控制)开放基金项目(11k070)
关键词
3价砷
电絮凝
响应面法
arsenic
electrocoagnlation
response surface methodology
