痕量Fe(Ⅲ)条件下MXene/PMS控制腐殖酸-镉复合污染

任乐晨; 徐一航; 陈龙雨; 张旭东; 鲁旭康; 李杰; 胡学伟; 李晨; 宋浩然; 赵群; 田森林

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (6) : 3102-3110.

水污染与控制

痕量Fe(Ⅲ)条件下MXene/PMS控制腐殖酸-镉复合污染

任乐晨, 徐一航, 陈龙雨, 张旭东, 鲁旭康, 李杰, 胡学伟, 李晨, 宋浩然, 赵群, 田森林

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Study on the control of humic acid-cadmium composite pollution by MXene/PMS under trace Fe(III) conditions

REN Le-chen, XU Yi-hang, CHEN Long-yu, ZHANG Xu-dong, LU Xu-kang, LI Jie, HU Xue-wei, LI Chen, SONG Hao-ran, ZHAO Qun, TIAN Sen-lin

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摘要

本文提出了一种在痕量Fe(III)条件下,利用MXene/单过硫酸盐(PMS)体系同步控制HA-Cd复合污染方法.结果表明,腐殖酸存在下,过渡金属碳/氮氧化(MXene)材料对Cd²⁺的吸附去除率从70%降低至48%,添加0.5μmol/L Fe(III)和50μmol/L PMS能够将Cd²⁺的去除率提高到60%以上.PMS的添加量过多或不足均会抑制Cd²⁺的去除.将Fe(III)从1.0μmol/L降到0.3μmol/L会促进Cd²⁺的去除.MXene材料的强还原性及其与金属离子之间的强相互作用,触发了Fe(III)/Fe(II)循环并抑制了铁离子的水解,实现了中性条件下HA-Cd复合污染的高效去除.反应体系生成的活性物种主要为羟基自由基和硫酸根自由基.在西江原水背景条件下,该技术保持了良好的去除效果.

Abstract

In this study, a method for control of humic acid-cadmium composite pollution using MXene/PMS process in the presence of trace Fe(III) was proposed. The results showed that the removal efficiency of Cd²⁺ by MXene material in the presence of humic acid decreased from 70% to 48%, and addition of 0.5μmol/L Fe(III) and 50μmol/L peroxymonosulfate increased the removal efficiency of Cd²⁺ to above 60%. too much or less PMS inhibited the removal of Cd²⁺. Reducing Fe(III) from 1.0μmol/L to 0.3μmol/L promoted the removal of Cd²⁺.The strong reducing property of MXene material and its strong interaction with metal ions triggered the Fe(III)/Fe(II) cycle and inhibited the hydrolysis of iron ions, realizing the efficient removal of humic acid-cadmium composite pollution under neutral conditions. The reactive species generated in the reaction system were mainly hydroxyl radicals and sulfate radicals. Under the background condition of Xijiang river, this technique maintained good removal effect.

导出引用

任乐晨, 徐一航, 陈龙雨, 张旭东, 鲁旭康, 李杰, 胡学伟, 李晨, 宋浩然, 赵群, 田森林. 痕量Fe(Ⅲ)条件下MXene/PMS控制腐殖酸-镉复合污染[J]. 中国环境科学. 2025, 45(6): 3102-3110

REN Le-chen, XU Yi-hang, CHEN Long-yu, ZHANG Xu-dong, LU Xu-kang, LI Jie, HU Xue-wei, LI Chen, SONG Hao-ran, ZHAO Qun, TIAN Sen-lin. Study on the control of humic acid-cadmium composite pollution by MXene/PMS under trace Fe(III) conditions[J]. China Environmental Science. 2025, 45(6): 3102-3110

中图分类号： X522

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