摘要
以黏土矿物伊利石为吸附剂,研究了伊利石吸附稀土浸出液中低浓度稀土离子过程中Y^(3+)初始浓度、吸附温度、溶液pH值、离子强度和反应时间对吸附的影响,构建了伊利石对钇元素吸附的等温模型和反应动力学模型,并分析了伊利石吸附钇元素的机理。结果表明:伊利石对Y^(3+)具有优良的吸附性能,Y^(3+)初始浓度增大、吸附温度升高、反应时间延长、溶液pH值升高,伊利石对Y^(3+)的吸附量均增大;Na^(+)、Mg^(2+)、Al^(3+)的存在会抑制伊利石对Y^(3+)的吸附,其影响程度从大到小依次为:Al^(3+)>Mg^(2+)>Na^(+);反应模型符合Langmuir吸附等温模型和准二级反应动力学模型;吸附过程中发生离子交换,属于化学吸附,吸附反应速率由化学反应控制。
Illite,a kind of clay mineral,was taken as an adsorbent in an experiment for low-concentration rare earth ions in rare earth leaching solution to explore effects of initial concentration of Y~(3+),adsorption temperature,pH value of solution,ion concentration,and adsorption time on the adsorption behavior of illite.Then,based on the constructed isotherm model for adsorption of yttrium ions by illite and its reaction kinetic model,the mechanism for the adsorption of yttrium ion by illite was analyzed.Results show that illite has an excellent adsorption performance for Y~(3+).With an increased initial concentration,higher temperature,prolonged time,and higher pH value of solution,the adsorption capacity of Y~(3+) for illite increases.It is found that the existence of Na~+,Mg~(2+) and Al~(3+) can inhibit the adsorption of Y~(3+) by illite in the following descending order of importance:Al~(3+) > Mg~(2+) > Na~+.The adsorption reaction follows Langnuir isotherm model and pseudo-second-order reaction kinetic model.Ion exchange reaction takes place during the adsorption process,thus this adsorption process belongs to chemical adsorption,with adsorption rate controlled by chemical reaction.
作者
吴呈皓
张臻悦
池汝安
陈文斗
陈卓
WU Chenghao;ZHANG Zhenyue;CHI Ru′an;CHEN Wendou;CHEN Zhuo(School of Resources and Safety Engineering,Wuhan Institute of Technology,Wuhan 430073,Hubei,China;Key Laboratory of Green Chemical Process of Ministry of Education,Wuhan 430073,Hubei,China)
出处
《矿冶工程》
CAS
北大核心
2024年第6期83-89,共7页
Mining and Metallurgical Engineering
基金
国家自然科学基金(92162109,52222405,52304293)。
关键词
风化壳淋积型稀土矿
伊利石
黏土矿物
吸附
化学反应
稀土
钇
weathered crust elution-deposited rare earth ore
illite
clay mineral
adsorption
chemical reaction
rare earth
yttrium
