农业环境科学学报2025，Vol.44Issue(7)：1860-1871,12.DOI:10.11654/jaes.2024-0767
铁基水热炭活化过硫酸盐催化降解三氯生机制
Mechanism of iron-based hydrochar in activating persulfate for triclosan catalytic degradation
摘要
Abstract
Given the limited catalytic degradation activity of biochar,iron-enriched sludge was transformed into iron-based hydrochar using a one-step hydrothermal method.This process leveraged the abundant chemical functional groups and variable redox properties of iron to enhance the activating ability of hydrochar for persulfate(PS).This study examined the performance and mechanisms by which iron-based hydrochar activates PS for the catalytic degradation of triclosan(TCS).The findings indicated that when the iron-to-carbon mass ratio in the sludge feedstock was 2.34∶1,the hydrochar exhibited the advantages of the highest specific surface area,richest pore structure,and strongest Fe-O/Si-O-Fe peak intensity.The optimal conditions for the permonosulfate(PMS)oxidation system were found to be iron-to-carbon mass ratio of iron-based hydrochar of 2.34∶1,iron-based hydrochar dosage of 0.6 g·L-1,PMS concentration of 1.5 mmol·L-1,and pH of 3.8.Under these conditions,the TCS degradation rate reached 91%,with a degradation rate constant(Kobs)of(0.022 5±0.001 6)min-1.After four reusability experiments,the Kobs remained at(0.017 7±0.001 7)min-1,demonstrating effective performance in real and simulated water environments.The degradation of TCS by the iron-based sludge hydrochar system was primarily mediated by a radical mechanism,with a synergistic effect between surface iron and carbon.关键词
富铁污泥/铁基水热炭/过硫酸盐氧化/三氯生/降解Key words
iron-enriched sludge/iron-based hydrochar/persulfate oxidation/triclosan/degradation分类
化学化工引用本文复制引用
牛梦瑶,郭晨楠,郑治,苏涵,王美艳,孙斌斌,王菲..铁基水热炭活化过硫酸盐催化降解三氯生机制[J].农业环境科学学报,2025,44(7):1860-1871,12.基金项目
国家自然科学基金青年科学基金项目(42007322) （42007322）
河北省中央引导地方科技发展资金项目(246Z3604G) Young Scientists Fund of the National Natural Science Foundation of China(42007322) （246Z3604G）
Central Government-guided Local Science and Technology Development Foundation of Hebei Province,China(246Z3604G) （246Z3604G）
