吉林大学学报（理学版）2025，Vol.63Issue(3)：963-972,10.DOI:10.13413/j.cnki.jdxblxb.2024337
铁系/污泥基生物炭催化剂的制备及性能
Preparation and Properties of Iron/Sludge-Based Biochar Catalysts
摘要
Abstract
In order to realize the comprehensive reuse of solid waste,the iron/sludge-based biochar catalyst was prepared by using the mixed sludge of activated sludge and Fenton iron sludge from the sewage treatment section of steel plant in Anshan,Liaoning Province as raw materials,and kaolinite as binder by a mixing-extrusion and pyrolysis method.The structure was characterized and the preparation process conditions were optimized.We optimized the process parameters of catalytic ozonation degradation of simulated wastewater containing quinoline as the target pollutant,and studied the stability and catalytic mechanism of catalyst.The experimental results show that the surface of catalyst is rough with a rich porous structures,and the catalyst mainly contains Fe3O4,CaCO3 and ZrO2 crystals.The optimal preparation conditions for the catalyst are a binder addition of 12.5％,pyrolysis temperature of 800 ℃,and pyrolysis time of 3 h.Under the conditions of initial pH=7,catalyst dosage of 50 g,and initial mass concentration of 50 mg/L of quinoline,the removal rate reaches 76.31％after 10 min of reaction.The catalyst has good stability,and the removal rate of quinoline only decreases by 0.09 percentage points after continuous use for five times.There are two types of hydroxyl radical(·OH)and superoxide anion radical(O2·-),as well as singlet oxygen(1O2)non free radicals in the catalytic system,with O2·-playing a dominant role in the reaction.The change of Fe2+/Fe3+ratio before and after the reaction indicates that the redox cycle of Fe2+/Fe3+participates in the catalytic degradation reaction.This study provides a new idea and method for the reuse of solid waste and the efficient treatment of coking wastewater.关键词
Fenton铁泥/生物污泥/铁系/污泥基生物炭/催化臭氧/喹啉Key words
Fenton iron sludge/activated sludge/iron/sludge-based biochar/catalytic ozonation/quinoline分类
环境科学引用本文复制引用
王飞,胡绍伟,马光宇,于梦琦,徐晓晨..铁系/污泥基生物炭催化剂的制备及性能[J].吉林大学学报（理学版）,2025,63(3):963-972,10.基金项目
国家自然科学基金(批准号:21777018). （批准号:21777018）
