赤泥基吸附剂对废水中重金属离子吸附机理研究 |
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引用本文: | 池姝妍,王博涵,黄丹丹,赵冰. 赤泥基吸附剂对废水中重金属离子吸附机理研究[J]. 矿产保护与利用, 2023, 43(1): 86-91. DOI: 10.13779/j.cnki.issn1001-0076.2023.01.008 |
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作者姓名: | 池姝妍 王博涵 黄丹丹 赵冰 |
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作者单位: | 东北大学 资源与土木工程学院, 辽宁 沈阳 110819 |
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基金项目: | 国家自然科学基金项目(52004056);东北大学大学生创新训练计划项目(211128) |
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摘 要: | 利用赤泥基吸附剂对废水中重金属离子开展吸附特性研究,以酸性废水中Cu2+、Zn2+为研究对象,借助吸附动力学模型、吸附等温线、FTIR、XRD等手段探究了赤泥基吸附剂的吸附机理。结果表明:赤泥基吸附剂对重金属离子Cu2+、Zn2+的吸附过程属于单分子层吸附,Langmuir吸附等温线拟合得出吸附剂对Cu2+、Zn2+的最大吸附量分别为33.12 mg/g、129.88 mg/g,符合准二级动力学模型。赤泥基吸附剂中Si-O-Si键与Cu2+、Zn2+发生相互作用,吸附过程为化学吸附。该研究为铝工业固废赤泥的回收利用提供了新途径。
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关 键 词: | 赤泥 吸附剂 废水 重金属离子 吸附动力学 吸附机理 |
收稿时间: | 2022-03-05 |
Heavy Metal Adsorption Mechanism of Red Mud-based Adsorbent in Acidic Wastewater |
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Affiliation: | School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China |
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Abstract: | The adsorption characteristics of heavy metal ions in wastewater were investigated by using red mud-based adsorbent. The adsorption mechanism of red mud-based adsorbent was investigated by means of adsorption kinetic model, adsorption isotherm, FTIR and XRD with Cu2+and Zn2+ in acidic wastewater as the target. The results showed that the adsorption process of heavy metal ions Cu2+ and Zn2+ by the red mud-based adsorbent belonged to monomolecular layer adsorption, and the maximum adsorption amounts of Cu2+ and Zn2+ by Langmuir adsorption isotherms were 33.12 mg/g and 129.88 mg/g, respectively, which were in accordance with the quasi-secondary kinetic model. The Si-O-Si in the red mud-based adsorbent interacted with Cu2+ and Zn2+ and the adsorption process was chemisorption. This study provides a new way for the recycling of solid waste red mud from aluminum industry. |
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