Removal of N-Nitroso Dimethylamine from Aqueous Solution by Nano Zero Valent Iron–Copper Bimetallic Composite Supported on Granular Activated Carbon

IF 0.8 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Doklady Chemistry Pub Date : 2025-03-19 DOI:10.1134/S0012500825600130

Chunfang Wang, Lihua Sun, Si Deng, Muxi Zhang, Zixuan Xi

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引用次数: 0

Abstract

Granular activated carbon-supported nano zero-valent iron-copper bimetallic composite(nZVI-Cu@GAC) was synthesized using the chemical liquid-phase reduction method. The morphology and physicochemical properties of the material were analyzed using scanning electron microscopy (SEM), a fully automatic specific surface area analyzer (BET), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The removal efficiency of N-nitrosodimethylamine (NDMA) by different materials was compared, and the adsorption process was further investigated using adsorption kinetics and isotherm models. The results showed that nZVI-Cu was well dispersed on the surface and in the pores of GAC. Among the tested materials, nZVI-Cu@GAC (Fe/Cu = 1/0.05, m/m) demonstrated the best NDMA removal efficiency, achieving a removal rate of 85.8%. The degradation process of NDMA by the composite material followed pseudo-second-order kinetics and the Freundlich model, indicating that the removal process was predominantly chemical adsorption and characterized by bimolecular layer adsorption on a heterogeneous surface. The nZVI-Cu@GAC (Fe/Cu = 1/0.05, m/m) composite exhibited the fastest adsorption rate, muscular adsorption capacity, and facile adsorption process. The removal of NDMA by nZVI-Cu@GAC was accomplished through the combined effects of GAC adsorption and nZVI-Cu chemical reduction. In conclusion, the nZVI-Cu@GAC composite material can effectively remove NDMA from water and holds better application prospects.

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采用化学液相还原法合成了颗粒活性炭支撑的纳米零价铁铜双金属复合材料（nZVI-Cu@GAC）。利用扫描电子显微镜（SEM）、全自动比表面积分析仪（BET）、傅立叶变换红外光谱（FTIR）和 X 射线光电子能谱（XPS）分析了材料的形貌和理化性质。比较了不同材料对 N-亚硝基二甲胺（NDMA）的去除率，并利用吸附动力学和等温线模型进一步研究了吸附过程。结果表明，nZVI-Cu 很好地分散在 GAC 的表面和孔隙中。在测试的材料中，nZVI-Cu@GAC（Fe/Cu = 1/0.05，m/m）对 NDMA 的去除率最高，达到 85.8%。复合材料对 NDMA 的降解过程遵循伪二阶动力学和 Freundlich 模型，表明其去除过程以化学吸附为主，以异质表面双分子层吸附为特征。nZVI-Cu@GAC（Fe/Cu = 1/0.05, m/m）复合材料的吸附速率最快、吸附容量最大、吸附过程最简便。在 GAC 吸附和 nZVI-Cu 化学还原的共同作用下，nZVI-Cu@GAC 实现了对 NDMA 的去除。总之，nZVI-Cu@GAC 复合材料能有效去除水中的 NDMA，具有较好的应用前景。

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来源期刊

Doklady Chemistry 化学-化学综合

CiteScore

1.20

自引率

12.50%

发文量

审稿时长

6-12 weeks

期刊介绍： Doklady Chemistry is a journal that publishes new research in chemistry and chemical engineering of great significance. Initially the journal was a forum of the Russian Academy of Science and published only best contributions from Russia in the form of short articles. Now the journal welcomes submissions from any country in the English or Russian language. Every manuscript must be recommended by Russian or foreign members of the Russian Academy of Sciences.