Preparation of Copper-loaded Activated Carbon and Its Adsorption Performance of SO2

YAO Mengling; QIN Xufeng; CHEN Dong; YANG Huan; YAN Ying; DAI Wenjun; XIANG Ruixuan

doi:10.19554/j.cnki.1001-3563.2025.23.014

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (23) : 138-144. DOI: 10.19554/j.cnki.1001-3563.2025.23.014

Advanced Materials

Preparation of Copper-loaded Activated Carbon and Its Adsorption Performance of SO₂

YAO Mengling¹, QIN Xufeng^1,*, CHEN Dong², YANG Huan¹, YAN Ying¹, DAI Wenjun¹, XIANG Ruixuan¹

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Abstract

The work aims to develop a new method for SO₂ removal in the closed environment of ammunition boxes. Copper nitrate modified coconut shell activated carbon was prepared by impregnation process. The microscopic pore structure, surface chemical properties, dynamic and static adsorption properties of sulfur dioxide were studied, and the adsorption mechanism was analyzed. The results showed that there were micropores and mesopores in copper-loaded activated carbon. The specific surface area and pore volume parameters of modified activated carbon decreased with the increase of copper nitrate concentration. Cu²⁺ was loaded in the micro-pore structure of activated carbon. When the concentration of impregnation solution was too high, copper-containing components covered the surface of activated carbon and blocked the micro-pore structure. The adsorption performance of copper-loaded activated carbon for sulfur dioxide was significantly improved, and the adsorption capacity first increased and then decreased with the increase of copper nitrate concentration. The adsorption capacity of 0.5 mol/L copper-loaded activated carbon for sulfur dioxide was the highest, reaching 168.3 mg/g, which was 455% higher than that before modification, and the purification effect of sulfur dioxide was better in a closed environment. Copper-loaded activated carbon has a good application prospect in the field of gas adsorption and removal.

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activated carbon / copper nitrate / impregnation / sulfur dioxide removal

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YAO Mengling, QIN Xufeng, CHEN Dong, YANG Huan, YAN Ying, DAI Wenjun, XIANG Ruixuan. Preparation of Copper-loaded Activated Carbon and Its Adsorption Performance of SO₂[J]. Packaging Engineering. 2025, 46(23): 138-144 https://doi.org/10.19554/j.cnki.1001-3563.2025.23.014

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