无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2026, Vol. 58 ›› Issue (3): 85-95.doi: 10.19964/j.issn.1006-4990.2025-0113

• 环境·健康·安全 • 上一篇    下一篇

电解锰渣基复合材料制备及对Cd2+的去除研究

韩庆文1(), 袁佳欣2,3, 占伟2,3(), 黄萍2,3, 南方铭2,3, 陈东辉2,3, 谭杰2,3   

  1. 1.湖北三峡实验室,湖北 宜昌 443007
    2.中南民族大学资源与环境学院,湖北省重金属污染防治工程技术研究中心,湖北 武汉 430074
    3.中南民族大学,催化转化与能源材料化学教育部重点实验室,湖北 武汉 430074
  • 收稿日期:2025-03-08 出版日期:2026-03-10 发布日期:2025-09-25
  • 通讯作者: 占伟(1983— ),男,博士,副教授,主要从事固体废物处理、催化氧化、重金属污染控制;E-mail:zw7789818@mail.scuec.edu.cn
  • 作者简介:韩庆文(1989— ),男,工程师,主要从事固废资源化;E-mail:qingwenhan@qq.com
  • 基金资助:
    湖北三峡实验室开放/创新基金项目(SC240016)

Study on preparation of electrolytic manganese slag-based composites and their Cd2+ removal

HAN Qingwen1(), YUAN Jiaxin2,3, ZHAN Wei2,3(), HUANG Ping2,3, NAN Fangming2,3, CHEN Donghui2,3, TAN Jie2,3   

  1. 1.Hubei Three Gorges Laboratory,Yichang 443007,China
    2.Hubei Engineering Research Center for Heavy Metal Pollution Prevention and Control,School of Resources and Environment,South-Central Minzu University,Wuhan 430074,China
    3.Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education,Wuhan 430074,China
  • Received:2025-03-08 Published:2026-03-10 Online:2025-09-25

摘要:

针对电解锰渣(EMR)资源化利用与含镉废水治理需求,通过酸浸-共沉淀法制备Ca-Fe-Mn复合材料(CFM),系统探究其对Cd2+的去除效能与机理。实验考察CFM投加量(0.2~1.5 g/L)、溶液初始pH(2.0~7.0)及反应温度(303~323 K)的影响规律,结合吸附动力学、等温模型拟合及X射线衍射仪(XRD)、扫描电子显微镜(SEM)等表征阐明Cd2+去除机制。结果表明:当CFM投加量为1.0 g/L时,出水Cd2+质量浓度降至0.1 mg/L以下,满足GB 8978—1996《污水综合排放标准》的限值;在pH为3.0~7.0时,323 K时最大理论吸附量达129.96 mg/g,Cd2+去除率均>99%;吸附过程符合准二级动力学模型(R2>0.99)与Langmuir模型(R2>0.98),表明CFM去除Cd2+的过程为单层吸附且以化学吸附为主,整个吸附过程速率主要由表面扩散控制。表征结果证明Cd2+去除机制为表面沉淀、静电吸引、层间插层及类质同象取代协同作用。CFM复合材料兼具高效吸附性、宽pH适应性与稳定性,且制备工艺简便、成本低廉,为EMR资源化与重金属污染治理提供新途径。

关键词: 电解锰渣, 脱除Cd2+, 酸浸-共沉淀, Ca-Fe-Mn复合材料

Abstract:

In this study,Ca-Fe-Mn composite materials(CFM) were prepared by acid leaching-co-precipitation method for the resource utilisation of electrolytic manganese residue(EMR) and the treatment of cadmium-containing wastewater to systematically investigate the removal efficacy and mechanism of Cd2+.The effects of CFM dosage(0.2~1.5 g/L),initial pH(2.0~7.0) and reaction temperature(303~323 K) were investigated to elucidate the Cd2+ removal mechanism by combining with the adsorption kinetics,isothermal model fitting,and characterisation by X-ray diffractometer(XRD) and scanning electron microscope(SEM).The results showed that the Cd2+ concentration in the effluent was reduced to below 0.1 mg/L when the dosage of CFM was 1.0 g/L,which met the limit value of “Comprehensive Wastewater Discharge Standard”(GB 8978—1996).The maximum theoretical adsorption capacity of 129.96 mg/g was achieved at 323 K in a wide range of pH 3.0~7.0,and the Cd2+ removal rate was >99%.The adsorption process was conformed to the quasi-secondary kinetic model(R2>0.99) and Langmuir model (R2>0.98),which indicated that the removal of Cd2+ by CFM was a monolayer adsorption with chemisorption as the main method,and the rate of the whole adsorption process was mainly controlled by surface diffusion.The characterisation results demonstrated that the Cd2+ removal mechanism was a synergistic effect of surface precipitation,electrostatic attraction,interlayer intercalation and homogeneous substitution.The material combined high adsorption efficiency,wide pH adaptability and stability,and the process was simple and low cost,which provided a new way for EMR resourcefulness and heavy metal pollution control.

Key words: electrolytic manganese residue, removal Cd2+, acid leaching-co-precipitation, Ca-Fe-Mn composite materials

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