有色金属科学与工程2024，Vol.15Issue(6)：792-800,9.DOI:10.13264/j.cnki.ysjskx.2024.06.002
新生二氧化锰的制备及其吸附硫酸锰溶液中钼的行为
Preparation of fresh manganese dioxide and its adsorption behavior to molybdenum in manganese sulfate solution
摘要
Abstract
Molybdenum is one of the most harmful impurities in electrolytic manganese dioxide(EMD),and its content in the manganese sulfate solution for the preparation of EMD plays a crucial role in the performance of mercury-free alkaline manganese batteries.In order to explore the influence and mechanism of manganese dioxide on the removal effect of molybdenum in solution,qualified fresh manganese dioxide as an adsorbent was prepared by adding hydrogen peroxide to manganese sulfate solution and controlling conditions so as to study the effects of pH value,manganese dioxide addition amount,reaction time and reaction temperature.The results showed that the optimum conditions for removing molybdenum were a pH value of 2.0,an addition amount of 1.0 g,a reaction time of 30 min,and a reaction temperature of 90℃.The residual molybdenum content in the final solution was 0.023 mg/L,which met the requirements of molybdenum content for the preparation of manganese sulfate solution for electrolytic manganese dioxide.Under this condition,the mechanism of molybdenum dioxide removal was revealed by SEM,EDS and XPS analysis.The fresh manganese dioxide was mainly reacted with molybdenum ions on the surface to generate ≡SOMoOH attached to the surface of MnO2,thereby achieving the purpose of molybdenum removal.关键词
新生二氧化锰/除钼/吸附/硫酸锰Key words
fresh manganese dioxide/molybdenum removal/adsorption/manganese sulfate分类
矿业与冶金引用本文复制引用
周兴杰,王家伟,王海峰,裴正清,马德华,郑可欣,鲁菊..新生二氧化锰的制备及其吸附硫酸锰溶液中钼的行为[J].有色金属科学与工程,2024,15(6):792-800,9.基金项目
铜市科研资助项目((2021)13号) （(2021）
黔科合重大专项资助项目([2022]003) （[2022]003）
黔科合支撑资助项目([2022]重点020) （[2022]重点020）
