安全与环境学报

2024 06 v.24 2370-2380

磁改性生物质炭渣对酸性矿山废水中Cu²⁺、Pb²⁺的吸附研究

狄军贞;袁博夫;阮浈;姜洋洋;高梦晴;李茹霜;

基金项目(Foundation): 国家自然科学基金项目(41672247,41102157); 辽宁省“兴辽英才”青年拔尖人才计划支持项目(XLYC1807159)

邮箱(Email):

DOI: 10.13637/j.issn.1009-6094.2023.1121

中文作者单位:

辽宁工程技术大学土木工程学院;

摘要(Abstract):

针对酸性矿山废水(Acid Mine Drainage, AMD)中Cu²⁺和Pb²⁺含量过高，生物质炭渣吸附能力有限等问题，以工业固体废弃物生物质炭渣为原材料，采用高锰酸钾和硫酸亚铁对生物质炭渣进行磁改性，制备生物质炭渣负载MnFe_2O_4的复合磁性材料(BC-MF),并将BC-MF作为去除酸性矿山废水环境中Cu²⁺和Pb²⁺的吸附剂。基于单因素试验方法，探究pH值、温度、初始质量浓度、吸附时间、共存金属离子等因素对BC-MF吸附Cu²⁺和Pb²⁺性能的影响，并将吸附动力学、吸附热力学、吸附等温线与扫描电子显微镜(Scanning Electron Microscopy, SEM)、X射线衍射(X-ray Diffraction, XRD)、傅里叶变换红外光谱(Fourier Transform Infrared Spectroscopy, FT-IR)、磁滞回线测试(Vibrating Sample Magnetometer, VSM)、Zeta电位(Zeta potential)等表征方法结合，研究MnFe_2O_4磁改性生物质炭渣吸附Cu²⁺、Pb²⁺的机理。结果显示，改性后的BC-MF对Cu²⁺和Pb²⁺的去除率均提升20百分点以上，且吸附饱和质量比分别为18.04 mg/g和24.98 mg/g。表征结果显示：MnFe_2O_4磁性颗粒成功负载到BC-MF上，并使之具有磁性；BC-MF对Cu²⁺和Pb²⁺吸附过程均符合Langmuir等温吸附方程和准二级动力学模型，吸附过程是为化学吸附为主的单层均相吸附；热力学结果表明该吸附过程属于自发进行的熵增过程。

关键词(KeyWords): 环境工程学;磁性;生物质炭;酸性矿山废水;重金属;吸附

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基本信息:

DOI：10.13637/j.issn.1009-6094.2023.1121

中图分类号:X75

引用信息:

[1]狄军贞,袁博夫,阮浈等.磁改性生物质炭渣对酸性矿山废水中Cu~(2+)、Pb~(2+)的吸附研究[J].安全与环境学报,2024,24(06):2370-2380.DOI:10.13637/j.issn.1009-6094.2023.1121.

基金信息:

国家自然科学基金项目(41672247,41102157); 辽宁省“兴辽英才”青年拔尖人才计划支持项目(XLYC1807159)

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