膨润土吸附三价铬离子检测方法的研究  

Analysis on the trivalent chromium ion adsorbed by bentonite with various detection methods

作　　者：黄昊翀 程行 杨美慧 杨梦凡 张自力 郑志远 HUANG Haochong;CHENG Hang;YANG Meihui;YANG Mengfan;ZHANG Zili;ZHENG Zhiyuan(School of Science,China University of Geosciences(Beijing),Beijing 100083,China;School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国地质大学(北京)数理学院,北京100083 [2]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《实验技术与管理》2022年第12期23-29,共7页Experimental Technology and Management

基　　金：国家自然科学基金项目(61805214);中国科学院上海技术物理研究所红外物理国家重点实验室(SITP-NLIST-YB-2022-12);中央高校基本科研业务费拔尖青年教师创新能力培养项目(2652022203,2652019107,2652020032);中国地质大学(北京)2019、2020年度本科教育质量提升计划建设项目(XNFZ202014,HHSKE202017);国家级大学生创新创业项目(2021111415086)。

摘　　要：膨润土作为具有特殊层状结构的黏土矿物材料,具有良好的阳离子交换和吸附特性,是一种潜在的土壤重金属污染天然修复剂。铬是化工等生产中产生的典型重金属污染物,会严重危害土壤种植和人体健康,亟待对铬污染过程及其修复机理进行研究。该文基于传统的分光光度测定法、X射线衍射法(XRD)和电感耦合等离子体质谱法(ICP-MS)等对膨润土吸附三价铬离子进行了实验教学表征研究,并结合新型表征方法太赫兹时域光谱技术对其吸附过程中的影响因子进行较为详细的分析。实验结果表明,膨润土的吸附性能随着吸附剂重量的增加以及吸附质浓度的增高而不断增强。Bentonite is a clay material with a special layered structure that exhibits superior cation exchange and adsorption properties,and is a potential natural remediation agent for heavy metal pollution in soil.Chromium is a typical heavy metal pollutant produced in chemical production,which will seriously harm soil planting and human health.The adsorption of trivalent chromium ions by bentonite is instructionally characterized by using spectrophotometry,X-ray diffraction(XRD),and inductively coupled plasma mass spectrometry(ICP-MS)methods,and the influencing factors in the adsorption process are analyzed in detail by combining the new characterization method,terahertz time-domain spectroscopy.The experimental results show that the adsorption value of bentonite shows an overall enhancement of adsorption performance with increasing adsorbent weight as well as increasing concentration of the adsorbent mass.

关 键 词：膨润土 吸附 铬离子(Ⅲ) 太赫兹技术 检测方法 

分 类 号：X53[环境科学与工程—环境工程]