有色金属科学与工程2025，Vol.16Issue(1)：143-151,9.DOI:10.13264/j.cnki.ysjskx.2025.01.016
离子型稀土矿中残留氨氮的淋洗去除及动力学研究
Removal and kinetics of residual ammonia nitrogen in ionic rare earth tailings by leaching
摘要
Abstract
Calcium lignosulfonate,rhamnose-lipids,magnesium sulfate and potassium magnesium sulfate were used for cup leaching and column leaching of residual ammonia nitrogen in ionic rare earth tailings.The effects of concentration(0～20 g/L),temperature(5～50℃),solid-liquid ratio(1∶2.5～1∶15)and time(0～24 h)on the removal efficiency of ammonia nitrogen were investigated.Column leaching experiments were conducted to compare the leaching effects of different agents and to carry out kinetic fitting.The results show that the removal ratio of ammonia nitrogen by column leaching of calcium lignosulfonate is 85.88%,which is 4.02 times higher than that by water leaching.The leaching process of magnesium sulfate and potassium magnesium sulfate conforms to the quasi-first-order kinetic equation,while the leaching process of calcium lignosulphonate fits the double constant equation better.Combined with the physical and chemical properties analysis of soil after leaching,calcium lignosulfonate as a leaching agent can not only effectively remove ammonia nitrogen,but also adjust soil pH,which has good engineering application potential.关键词
离子型稀土/氨氮/淋洗/动力学分析/木质素磺酸钙Key words
ionic rare earth/ammonia nitrogen/eluviation/kinetic analysis/calcium lignosulfonate分类
资源环境引用本文复制引用
谢心怡,罗玉霞,邱慧,王健行,赵学付,王春英..离子型稀土矿中残留氨氮的淋洗去除及动力学研究[J].有色金属科学与工程,2025,16(1):143-151,9.基金项目
国家重点研发计划资助项目(2019YFC1805100) （2019YFC1805100）
国家自然科学基金资助项目(52360025) （52360025）
江西理工大学清江青年英才支持计划项目(JXUSTJYX2016003) （JXUSTJYX2016003）
