孔雀绿
壳聚糖
吸附
降级(电信)
复合数
二茂铁
化学工程
浸出(土壤学)
多孔性
废水
化学
比表面积
核化学
材料科学
催化作用
复合材料
有机化学
废物管理
电化学
电极
土壤科学
土壤水分
环境科学
物理化学
工程类
电信
计算机科学
作者
Shanjuan Zhao,Haiyang Xie,Xun Tang,Guoqiang Lü,Yongmin Zhang
标识
DOI:10.1016/j.carbpol.2023.120770
摘要
Treating wastewater containing malachite green (MG) using porous materials with both adsorption and degradation functions have become a major challenge in achieving the carbon neutrality goal. Herein by incorporating the ferrocene (Fc) group as a Fenton active center, a novel composite porous material (DFc-CS-PEI) was prepared using chitosan (CS) and polyethyleneimine (PEI) as skeletons and oxidized dextran as a crosslinker. DFc-CS-PEI not only possesses satisfactory adsorption performance to MG but also excellent degradability in the presence of a minor amount of H2O2 (3.5 mmol/L) without any additional assistance, due to high specific surface area and active Fc group. The maximum adsorption capacity is ca. 177.73 ± 3.11 mg/g, outperforming most CS-based adsorbents. The removal efficiency of MG is significantly enhanced from 20 % to 90 % as DFc-CS-PEI and H2O2 coexist, due to ·OH-dominated Fenton reaction, and remained in a wide pH range (2.0-7.0). Cl- exhibits notable suppression on the degradation of MG because of quenching effects. Note that DFc-CS-PEI has a very small iron leaching (0.2 ± 0.015 mg/L), and can be rapidly recycled by simple water-washing, without any harmful chemicals and potential second pollution. Such versatility, high stability, and green recyclability make the as-prepared DFc-CS-PEI a promising porous material for the treatment of organic wastewater.
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