绿色合成纳米铁去除矿区废水中稀土元素:动力学与机制  

Removal of Rare Earth Elements from Mine Wastewater by Green Synthetic Nano Iron:Kinetics and Mechanism

作　　者：林强 周淦晨 金晓英[2] 陈祖亮[2] LIN Qiang;ZHOU Ganchen;JIN Xiaoying;CHEN Zuliang(Fujian Soil and Water Conservation Test Station,Fuzhou 350001,China;College of Environmental and Resource Sciences·College of Carbon Neutral Modern Industry,Fujian Normal University,Fujian Key Laboratory of Pollution Control and Resource Reuse,Fuzhou 350117,China)

机构地区：[1]福建省水土保持试验站,福建福州350001 [2]福建师范大学环境与资源学院、碳中和现代产业学院,福建省污染控制与资源循环利用重点实验室,福建福州350117

出　　处：《环境科学与技术》2024年第S2期178-184,共7页Environmental Science & Technology

基　　金：福建省自然科学基金项目(2022J01649);福建省水利科技资助项目(MSK202208)

摘　　要：随着稀土资源的开发以及人们对环境保护的日益重视,稀土矿区废水的处理受到研究者的关注。文章利用绿色合成法制备的绿茶纳米铁(GT-Fe)去除矿区废水中的稀土元素(REEs),并探究其去除机制。实验结果表明:GT-Fe对稀土元素的最大去除效率分别为97.81%(Y)、78.85%(La)、52.27%(Dy)、80.49%(Er)、71.11%(Yb);FTIR和XPS表征结果证明,GT-Fe对稀土元素的吸附主要通过表面多酚类化合物中的有机官能团和Fe-O键的共同作用;此外,吸附动力学分析表明GT-Fe对稀土元素的吸附符合化学吸附;GT-Fe经过4次循环使用后仍具有较高的活性,表明绿色合成GT-Fe是一种环保、高效的吸附剂,能够实现矿区废水治理和生态环境保护的双重效应。With the exploitation of rare earth resources and the increasing attention to environmental protection,the treatment of wastewater from rare earth mining areas has attracted the interest of researchers.This paper utilized green synthesized greentea nano-iron(GT-Fe)for the efficient removal of rare earth elements(REEs)in mining wastewater and explores its removal mechanism.The experimental results showed that the maximum removal efficiency of GT-Fe for REEs is 97.81%for Yttrium(Y),78.85%for Lanthanum(La),52.27%for Dysprosium(Dy),80.49%for Erbium(Er),and 71.11%for Ytterbium(Yb).The characterization results from FTIR and XPS demonstrated that the adsorption of REEs by GT-Fe is mainly through the combined action of organic functional groups in surface polyphenolic compounds and Fe-O bonds.In addition,the adsorption kinetics analysis indicated that the adsorption of REEs by GT-Fe conformed to chemical adsorption.After four cycles of reuse,GT-Fe still exhibited high activity,indicating that green synthesized GT-Fe was an environmentally friendly,and efficient adsorbent,capable of achieving dual effects of wastewater management and ecological environment protection.

关 键 词：GT-Fe 绿色合成 矿区废水 稀土元素 吸附 

分 类 号：TQ424[化学工程] X751[环境科学与工程—环境工程]