摘要
利用功能化纳米结构材料修饰电极检测水环境中重金属离子是环境分析领域的研究热点之一。将染料化工废水混凝处理后的铁基污泥经过高温煅烧改性得到碳基复合材料,并通过扫描电子显微镜(SEM)、傅里叶红外光谱仪(FT-IR)、X射线衍射仪(XRD)和X射线光电子能谱仪(XPS)对其进行表征。采用碳基复合材料修饰玻碳电极构建了Hg(II)的电化学敏感界面,通过方波阳极溶出伏安法(SWASV)对Hg(II)进行了选择性测定,取得的结果如下:(1)最优化条件下煅烧600℃材料的灵敏度和最低检测限(LOD)分别达到了27.945μA/μM和0.0145μM(S/N=3);(2)0.5μM的重金属离子Cd^(2+)、Zn^(2+)、Pb^(2+)、Cu^(2+)对检测Hg^(2+)的干扰均在可控范围内;(3)实际水样中Hg^(2+)的检测达到了92%-93%的回收率。研究拓展了染料化工废水铁基混凝污泥在电化学检测方向的资源化利用。
Exploring functional nanomaterials modified electrodes for electrochemically detecting heavy metal ions in the aqueous environment is one of the hottest issues in the environmental analysis field.In this paper,carbon-based composite material was obtained by pyrolyzing coagulation sludge of dyeing industrial wastewater at high temperature,and characterized by Scanning Electron Microscopes(SEM),Fourier Infrared Spectrometer(FT-IR),X-ray Diffraction(XRD)and X-ray Photoelectron Spectroscopy(XPS).The electrochemical sensing interface was constructed with glassy carbon electrode modified by the as-prepared carbon-based composites,and show a high sensitivity for Hg(II)determination using square wave anodic stripping voltammetry(SWASV).results are as follows:(1)The sensitivity and minimum detection limits for Hg(II)were 27.945μA/μM and 0.0145μM(S/N=3)in Hg(II)detection.(2)The interference of 0.5μM heavy metal ions Cd^(2+),Zn^(2+),Pb^(2+)and Cu^(2+)in the detection of Hg^(2+)was all in a controllable range.(3)the application of electrochemical sensors for Hg(II)analysis in real water environment is 93.92%spike recovery.This study expands the application of iron-based coagulation sludge in electrochemical detection.
作者
杨芹芹
吕新新
刘旭
戴正亮
王贝
黄剑豪
陈星
YANG Qinqin;LV Xinxin;LIU Xu;DAI Zhengliang;WANG Bei;HUANG Jianhao;CHEN Xing(Institute of Industry and Equipment Technology,Hefei University of Technology,Hefei 230009,China;Anqing Changhong Chemical Co.Ltd.,Anqing 246002,China)
出处
《聊城大学学报（自然科学版）》
2021年第4期43-53,共11页
Journal of Liaocheng University:Natural Science Edition
基金
国家自然科学基金项目(21777164)
安徽省科技重大专项项目(202003a07020004)资助。
关键词
染料化工废水
混凝污泥
热解
电化学检测
HG(II)
Dye industrial wastewater
Coagulation sludge
Pyrolysis
Electrochemical detection
Hg(II)
