摘要
研究了甲醛肟分光光度法测定铀水冶废水中的Mn^(2+),考察了影响显色体系灵敏度和稳定性的各因素,确定了最佳测定条件。试验结果表明:在pH=11的氨-氯化铵缓冲介质中,甲醛肟与Mn^(2+)生成红褐色配合物(λ_(max)=450nm);最佳条件下,Mn^(2+)质量浓度在0.05~5mg/L范围内符合比尔定律,检出限(3σ)为0.01mg/L;有大量Ca^(2+)、Mg^(2+)、Al^(3+)、Zn^(2+)、Fe^(3+)及Cl^-、NO_3^-、SO_4^(2-)、CO_3^(2-)存在条件下,Mn^(2+)的测定无干扰;对铀水冶实际废水进行测定,Mn2+回收率在96.0%~102%之间,测定结果较为稳定。
Determination of Mn^2＋ in uranium mining and metallurgical waste water by formaldehyde oxime spectrophotometric method was studied.The influence factors on chromogenic system sensitivity and stability were examined,the optimum determination conditions were determined.Experimental results show that ammonia-chloride buffer medium of pH=11,formaldehyde oxime and Mn^2＋ generats reddish-brown complexes（λmax=450nm）.Under the optimal conditions,the mass concentration of Mn^2＋ at the range of 0.05-5mg/L conforms to the Beer′s law,detection limit（3σ）is0.01 mg/L.The existence of Ca^2＋,Mg^2＋,Al^3＋,Zn^2＋,Fe^3＋ and Cl^-,NO^3-,SO4^2-,CO3^2- have no interference on determinating Mn^2＋.Determination recovery of Mn^2＋ in uranium mining and metallurgical wastewater is 96%-102%,the results are stable.
出处
《湿法冶金》
CAS
北大核心
2017年第2期164-166,共3页
Hydrometallurgy of China
关键词
甲醛肟
废水
分光光度法
测定
锰
formald oxime
waste water
spectrophotometry
determination
manganese
