高浓度硫酸钴体系下的深度除镉研究  

Study on Deep Removal of Cadmium in High Concentration Cobalt Sulfate System

作　　者：黄飞中 宋如梦 康亮 王红忠 牛乙涛 Huang Feizhong;Song Rumeng;Kang Liang;Wang Hongzhong;Niu Yitao(Zhejiang Gepai Cobalt New Materials Co.,Ltd.,Shaoxing,China;Gansu Jingpu Testing Technology Co.,Ltd.,Lanzhou,China)

机构地区：[1]浙江格派钴业新材料有限公司,浙江绍兴 [2]甘肃精普检测科技有限公司,甘肃兰州

出　　处：《科学技术创新》2024年第8期46-49,共4页Scientific and Technological Innovation

摘　　要：为满足电解硫酸钴原液品质工艺要求,本文在含镉高浓度硫酸钴体系下,采用大孔型硫脲官能团螯合树脂对硫酸钴溶液进行动态吸附除镉,考察了进样流速、树脂床层长径比等因素对树脂除镉效果的影响。结果表明:除镉流出液中Co浓度几乎不变,除镉深度可达0.1 mg/L以下,可以满足电解要求;综合考虑树脂使用时长、处理水量、再生难易程度等因素,流速为2 BV/h、树脂床层长径比为9:1条件下除镉效果最好;达到出水条件后,将树脂用盐酸-硫脲活化,纯水反洗再生,洗脱率达到97%,经过5次吸附-解吸再生循环后,树脂对Cd吸附量仍能达到首次的88.6%,树脂再生稳定性良好,可循环使用。In order to meet the process requirement of electrolytic cobalt for the quality of cobalt sulfate,the dynamic adsorption of cadmium was carried out by macroporous thiourea functional group chelating resin under the system of high concentration cobalt sulfate.The effects of injection flow rate and the ratio of length to diameter on the removal of cadmium by resin were investigated.The results showed that the concentration of Co was almost unchanged,and the depth of Cd for cadmium removal was less than 0.1 mg/L,which could meet the requirement of electrolysis.The effect of removing cadmium was the best when the flow rate was 2 BV/h and the ratio of length to diameter was 9:1 under the factors considered comprehensively,such as the use time of the resin,the amount of water treated and the difficulty degree of regeneration.The resin was activated with hydrochloric acid-thiourea and regenerated by back washing with pure water when the effluent condition was reached and the elution rate reached 97%.After 5 times of adsorption-desorption regeneration cycles,the adsorption capacity of Cd could reached 88.6% of the initial.The resin could be recycled with good stability.

关 键 词：高浓度硫酸钴 硫脲基螯合树脂 动态吸附 深度除镉 

分 类 号：X703.1[环境科学与工程—环境工程]