化学镀镍废液中硫酸根增值化为硫酸钡试验研究  

Value⁃added utilization of sulfate anions in the spent electroless nickel plating bath into barium sulfate

作　　者：吴鹄 许稳 梁勇[1] 秦牡兰[1] 刘万民[1] WU Hu;XU Wen;LIANG Yong;QIN Mulan;LIU Wanmin(College of Materials and Chemical Engineering,Hunan Institute of Engineering,Xiangtan 411104,China)

机构地区：[1]湖南工程学院材料与化工学院,湖南湘潭411104

出　　处：《中国有色冶金》2024年第5期103-110,共8页China Nonferrous Metallurgy

基　　金：湖南省自然科学基金项目(No.2021JJ30183,No.2020JJ5102);湖南省教育厅科研项目(No.19A111,No.22B0741)。

摘　　要：化学镀镍废液排放量大、成分复杂,其合理处置有利于减轻环境污染和提高资源回收利用率,目前该废液的处置工艺缺少对硫、钠、磷、碳等元素的回收。本研究以除镍后化学镀镍废液和醋酸钡为原料,利用废液中柠檬酸根离子对钡离子的络合作用,采用共沉淀法制备了BaSO_(4)粉体。研究了溶液pH值、柠檬酸根离子与钡离子摩尔比、反应温度和反应时间对硫酸根离子去除率、BaSO_(4)产率及其形貌的影响。结果表明,在溶液pH=9、柠檬酸根离子与钡离子摩尔比为1∶3、反应温度55℃、反应时间10 h的条件下,硫酸根离子去除率达到99.7%以上,BaSO_(4)产率达到98.9%以上;所得BaSO_(4)粉体呈类球形,粒径分布范围窄,纯度高。该工艺实现了化学镀镍废液中硫酸根的增值化利用,符合绿色循环经济发展理念。The rational treatment of spent electroless nickel plating bath is a subject of environmental protection and resource utilization owing to its large emission and complex composition.The recycling of sulphur,sodium,phosphorous and carbon elements in the spent bath is seldom investigated.BaSO_(4)powders were prepared by a co⁃precipitation method from the spent bath where nickel ions were removed,using the complexation of citrate anions for barium ions.It was investigated that the effects of the molar ratio of citrate ions and barium ions,pH value,temperature and time on the removal rate of sulfate ions,barium sulfate’s productivity,morphology and particle size distribution.The results show that under the condition of the ions ratio of 1∶3,the pH value of 9,the temperature of 55℃and the time of 10 h,the removal rate of sulfate ions and the productivity of barium sulfate reach 99.7%and 98.9%,respectively.The obtained barium sulfate consists of narrow⁃distribution uniform⁃sized high⁃purity spherical⁃like particles.This route achieves the high⁃value resource utilization of sulfate anions in the spent electroless nickel plating bath,which conforms to the concept of green circular economy.

关 键 词：化学镀镍废液 硫酸根 硫酸钡 柠檬酸根 络合作用 共沉淀法 增值化利用 

分 类 号：TF803.27[冶金工程—有色金属冶金] X758[环境科学与工程—环境工程]