摘要
利用硫酸酸浸提取制革污泥中的金属铬,研究了固液比、酸浓度、浸出时间、温度和搅拌速度等因素对浸出效率的影响,并获得最优浸出条件。结果表明,最优浸出条件为:固液比10g/L,硫酸浓度0.5mol/L,浸出温度50℃,浸出时间1.5h。搅拌速度对硫酸浸出铬影响较小。经硫酸二次浸出铬的效率达到90.95%。因此,用硫酸酸浸的方法提取制革污泥中的铬是可行的。
Leaching studies of tannery sludge were carried out in sulfuric acid media aiming to recover the maximum leaching yield of chromium. The effect of various factors （solid-liquid ratio, the concentration of acid, leaching time, temperature and stirring rate） was studied. The results indicate that the optimum solid-liquid ratio is 10g/L, the concentration of sulfuric acid is 0.5mol/L, the leaching temperature is 50℃, and the leaching time is 1.5h. The stirring rate affected rarely on leaching yield of chromium. After two times of leaching, the leaching yield of chromium had become 90.95%. Therefore, recover chromium is available. the application of sulfuric acid leaching to
出处
《能源环境保护》
2015年第1期12-15,共4页
Energy Environmental Protection
基金
浙江省大学生科技创新活动计划(新苗人才计划)创新创业孵化项目(2013R408071)
关键词
制革污泥
酸浸
回收
铬
Tannery sludge
Acid leaching
Recovery
Chromium
