过硫酸盐
孔雀绿
生物炭
降级(电信)
催化作用
化学
复合数
废水
热解
吸附
激进的
猝灭(荧光)
化学工程
核化学
材料科学
废物管理
有机化学
荧光
复合材料
物理
工程类
电信
量子力学
计算机科学
作者
Quanlong Huang,Congjin Chen,Xilian Zhao,Xinyan Bu,Xiufen Liao,Hui Fan,Wenting Gao,Huayu Hu,Yanjuan Zhang,Zuqiang Huang
标识
DOI:10.1016/j.jece.2021.105800
摘要
If dye wastewater discharges directly into the environment, it will make detrimental effects on the environment. Thus, it is urgently needed to develop an effective catalyst to activate persulfate for degrading dye wastewater. The CuFe2O4@biochar composite (CuFe2O4@BC) was synthesized by one-step sol-gel pyrolysis method and was evaluated for efficiency, stability and mechanism activating PS to degrade malachite green (MG). It was found that the degradation efficiency of MG in the CuFe2O4@BC/PS system was 98.9%, suggesting that CuFe2O4@BC exhibited the best catalytic activity among all the catalysts at optimum conditions. Furthermore, the MG degradation efficiency and TOC removal efficiency in the various systems followed an order: CuFe2O4@BC/PS > CuFe2O4@BC/PMS > CuFe2O4@BC/H2O2. Cl– at low (< 10 mM) and high (> 10 mM) concentrations exhibited dual effects. CuFe2O4@BC exhibited a favorable, stable catalytic performance in multiple runs. Free radical quenching experiments showed that O2•– was also contributed to MG degradation in the CuFe2O4@BC/PS system except the surface-adsorbed radicals, providing new insight into the mechanism of activation of PS by CuFe2O4@BC. The PS activation mechanism and the two possible degradation pathways of MG were analyzed. The CuFe2O4@BC composite with high catalytic efficiency and stability and reusability possesses promising prospects to activate PS for treating MG-contaminated wastewater.
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