铁锰氧化物负载凹土-水热炭复合材料对水中Cd的吸附性能及机制研究

葛俊伟; 刘会东; 汪梦宇; 沈志澄; 余升城; 董良飞

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (9) : 4923-4934.

水污染与控制

铁锰氧化物负载凹土-水热炭复合材料对水中Cd的吸附性能及机制研究

葛俊伟¹, 刘会东^1,3, 汪梦宇², 沈志澄¹, 余升城¹, 董良飞¹

作者信息 +

Study on the adsorption performance and mechanism of Fe/MnO_x loaded attapulgite-hydrochar composite material for Cd in water

GE Jun-wei¹, LIU Hui-dong^1,3, WANG Meng-yu², SHEN Zhi-cheng¹, YU Sheng-cheng¹, DONG Liang-fei¹

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文章历史 +

摘要

为高效去除水中Cd(II),本研究将盐酸活化凹凸棒土与水热炭复合,并原位负载铁锰双金属氧化物,制备了一种新型吸附剂.采用SEM-EDS, XPS, XRD, FTIR, BET对材料进行表征,揭示了铁锰氧化物及羟基、羧基等功能位点对Cd(II)的协同化学吸附作用.最佳配比吸附剂对Cd(II)的最大吸附容量为66.8mg/g.吸附过程符合伪二级动力学和Langmuir模型,表明主要为单层化学吸附.经5次吸附-脱附循环后,材料仍保持约75%的初始吸附容量,展现出优异的再生性能.本实验结果为低成本、高效、多次可用的水体重金属治理提供了可靠的技术支撑.

Abstract

To efficiently remove Cd (II) from water, this study prepared a novel adsorbent by compositing hydrochloric acid-activated attapulgite with hydrochar and in-situ loading iron-manganese bimetallic oxides. The material was characterized by SEM-EDS, XPS, XRD, FTIR, and BET, revealing the synergistic chemisorption of Cd (II) by iron-manganese oxides and functional groups such as hydroxyl and carboxyl groups. The optimally proportioned adsorbent exhibited a maximum Cd (II) adsorption capacity of 66.8mg/g. The adsorption process followed pseudo-second-order kinetics and the Langmuir model, indicating predominantly monolayer chemisorption. After five adsorption-desorption cycles, the material retained approximately 75% of its initial adsorption capacity, demonstrating excellent regeneration performance. These experimental results provide a reliable technical basis for low-cost, highly efficient, and reusable remediation of heavy metals in water bodies.

导出引用

葛俊伟, 刘会东, 汪梦宇, 沈志澄, 余升城, 董良飞. 铁锰氧化物负载凹土-水热炭复合材料对水中Cd的吸附性能及机制研究[J]. 中国环境科学. 2025, 45(9): 4923-4934

GE Jun-wei, LIU Hui-dong, WANG Meng-yu, SHEN Zhi-cheng, YU Sheng-cheng, DONG Liang-fei. Study on the adsorption performance and mechanism of Fe/MnO_x loaded attapulgite-hydrochar composite material for Cd in water[J]. China Environmental Science. 2025, 45(9): 4923-4934

中图分类号： X703.5

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