文献类型：期刊文献

中文题名：rGO、TiO_(2)修饰铁基磁性吸附材料除铊的性能

英文题名：Removal of thallium by rGO and TiO_(2) modified iron-based magnetic adsorbents

作者：李良忠[1,2];虞璐[3];刘畅[1,4];马瑞雪[1];于洋[5];厉巍[2];于云江[1];刘勇弟[2]

机构：[1]生态环境部华南环境科学研究所,国家环境保护环境污染健康风险评价重点实验室,广州510535;[2]华东理工大学资源与环境工程学院,上海200237;[3]北京工业大学,北京100124;[4]内蒙古大学生态与环境工程学院,内蒙古水污染控制重点实验室,呼和浩特010021;[5]暨南大学环境学院,广州511443

年份：2022

卷号：16

期号：12

起止页码：3864

中文期刊名：环境工程学报

外文期刊名：Chinese Journal of Environmental Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家重点研发计划项目(2020YFC1808201);广州市科技计划资助项目(202201011626);广东省基础与应用基础研究基金资助项目(2022A1515010346);国家自然科学基金资助项目(42007390,22006102)。

语种：中文

中文关键词：磁性纳米复合材料;铊;吸附氧化;电子传递

外文关键词：magnetic nanocomposites;thallium;adsorption oxidation;electron transfer

摘要：近年来,铊(Tl)污染事件时有发生,对饮用水源造成了严重威胁,含铊废水的高效处理刻不容缓。通过化学共沉淀法制备Fe_(3)O_(4)颗粒,结合水热反应、溶胶凝胶等改性方法,制备了磁性钛铁纳米颗粒(TFNPs)、四氧化三铁/二氧化钛核壳颗粒(Fe_(3)O_(4)@TiO_(2))和还原氧化石墨烯负载四氧化三铁/二氧化钛(rGO-Fe_(3)O_(4)@TiO_(2))复合磁性材料,考察磁性复合材料吸附、氧化去除Tl(Ⅰ)的性能,并阐明其作用机制。结果表明,TFNPs、Fe_(3)O_(4)@TiO_(2)和rGO-Fe_(3)O_(4)@TiO_(2)单位Ti含量条件下Tl(I)最大吸附容量分别为200、271.8和440 mg-Tl·g-Ti^(-1)。TFNPs/过硫酸盐(PS)、Fe_(3)O_(4)@TiO_(2)/PS和rGO-Fe_(3)O_(4)@TiO_(2)/PS耦合体系对Tl的去除率分别为51.7%、47.2%和88.4%,这表明rGO-Fe_(3)O_(4)@TiO_(2)/PS耦合体系能够高效的去除Tl。在Tl(Ⅰ)和PS混合溶液中,Fe_(3)O_(4)、rGO和rGO-Fe_(3)O_(4)@TiO_(2)的电子供给容量(EDC)分别为168.2、225.4和195.4μmol-e^(-)·g^(-1),而电子接受容量(EAC)分别为131.4、746.8和571.3μmol-e^(-)·g^(-1),表明rGO具有优异的电子转移能力。本研究结果可为含铊废水高效处理材料的开发提供参考。
The thallium pollution leading to a serious threat to the safety of drinking water in downstream cities.Therefore,the efficient treatment of thallium containing wastewater is urgently needed.In this study,Fe_(3)O_(4)particles were prepared by chemical coprecipitation method and the surface loading of TiO_(2)nanoparticles was prepared by hydrothermal reaction and sol-gel method.Three different magnetic adsorbents including TFNPs,Fe_(3)O_(4)@TiO_(2)and rGO-Fe_(3)O_(4)@TiO_(2)composite were developed for the removal of thallium from water.The maximum adsorption capacities of Tl(Ⅰ) under unit Ti content on TFNPs,Fe_(3)O_(4)@TiO_(2)and rGO-Fe_(3)O_(4)@TiO_(2)magnetic composites were 200,271.8 and 440 mg-Tl·g-Ti^(-1),respectively.Therefore,the rGO-Fe_(3)O_(4)@TiO_(2)adsorbent achieved the efficient removal of Tl(Ⅰ) from water.The Tl removal rates of TFNPs/PS,Fe_(3)O_(4)@TiO_(2)/PS and rGO-Fe_(3)O_(4)@TiO_(2)/PS hybrid systems were respectively 51.7%,47.2%and 88.4%,indicating that rGO-Fe_(3)O_(4)@TiO_(2)/PS hybrid system could remove Tl quickly and efficiently.The electronic supply capacities (EDC) of Fe_(3)O_(4),rGO and rGO-Fe_(3)O_(4)@TiO_(2)were respectively 168.2,225.4 and 195.4μmole-·g^(-1),when they were added into Tl(Ⅰ) and PS mixed solution.The electron acceptance capacity (EAC) values were respectively,131.4,746.8 and 571.3μmol-e^(-)·g^(-1),which indicated that rGO nanosheets have excellent electron transfer ability.The results of this study can provide a reference for the development of efficient thallium containing wastewater treatment materials.