阳极液提取Mn^(2+)和NH_3-N的影响因素及其分析  

Extraction of Mn^(2+)and NH_3-N from Eletrolytic Manganese Slag Using Anolyte as Extractant and Its Kinetic Study

作　　者：费讲驰[1] 范丹[1] 滕瑶[1] 何则强[1] 熊利芝[1] 

机构地区：[1]吉首大学生物资源与环境科学学院,湖南吉首416000

出　　处：《吉首大学学报（自然科学版）》2014年第4期69-73,共5页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(51142001;51262008;51202087;51364009);湖南省自然科学基金重点资助项目(12JJ2005);湖南省教育厅重点资助项目(12A109);湖南省科技计划重点资助项目(2012GK2017);湖南省高校创新平台资助项目(13K094);湖南省大学生研究性学习和创新性实验计划项目(JSU-CX-2011-41)

摘　　要：以阳极液作为提取剂,从电解锰渣中提取Mn2+和NH3-N,考察了液固比、反应温度和反应时间等3个因素对Mn2+和NH3-N提取效果的影响.实验结果表明,阳极液对Mn2+的提取效果明显优于对NH3-N的提取效果.Mn2+的最佳提取条件是液固比(mL/g)为10∶1,在50℃下反应30min,提取率达72.1%;NH3-N的最佳提取条件是液固比为10∶1,在50℃下反应40min,提取率达45.6%.动力学研究表明,阳极液对电解锰渣中Mn2+的提取反应符合拟一级动力学方程,而对NH3-N的提取反应符合拟二级动力学方程.Extraction of Mn2＋ and NH3-N from electrolytic manganese slag with anolyte as extractant was studied. The influence of liquid-solid ratio, extraction time, temperature on the extraction efficiency of Mn2＋ and NH3-N was investigated. Results indicated that the extraction efficiency of Mn2＋ with anolyte was better than that of NH3-N. The optimum extraction efficiency of Mnz＋ was 72.1% which was ob- tained when the liquid-solid ratio （mL/g） was 10： 1 at 50 ℃ for 30 min. The optimum extraction effi- ciency of NH3-Nwas 45.6% which was obtained when the liquid-solid ratio was 10 ： at 50 ℃ for 40 min. Kinetic study suggests that the extraction of Mn2＋ from electrolytic manganese slag with anolyte as extractant accords with pseudo first-order kinetics equation,while that of NH3-N agrees well with pseudo second-order kinetics equation.

关 键 词：电解锰渣 锰离子 氨氮 阳极液 动力学 

分 类 号：X753[环境科学与工程—环境工程] TF792[冶金工程—钢铁冶金]