文献类型：期刊文献

英文题名：Nitrogen-doped biochar from dealkalized lignin with hierarchical porous structure for the efficient degradation of sulfamethoxazole via peroxymonosulfate activation

作者：Shao, Wenli[1,2];Yu, Qi[1,2];Zhang, Wei[1,2,3];Wang, Xiaochong[1,2];Wang, Luo[1,2];Xiu, Guangli[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Environm Protect Key Lab Environm Stand &, Shanghai 200237, Peoples R China;[3]Tongji Univ, Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2025

卷号：73

外文期刊名：JOURNAL OF WATER PROCESS ENGINEERING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001471525900001)】；

基金：This work was supported by the Natural Science Foundation of Shanghai [No. 17ZR1407000] , and the Fundamental Research Funds for the Central Universities [No. 222201514337] .

语种：英文

外文关键词：Dealkalized lignin; Biochar; PMS; Pyrolysis temperature; Modifying agent

摘要：Dealkalized lignin is one of the major by-products of paper industry waste, and its resource utilization plays a key role in reducing carbon emissions from the paper industry. In this work, nitrogen-doped lignin-derived biochars were prepared by high-temperature pyrolysis with melamine and NaHCO3 as effective peroxymonosulfate (PMS) activator to degrade antibiotic pollutants sulfamethoxazole (SMX). The characterization analysis showed m-Nalig-800 synthesized at 800 degrees C has a high specific surface area (538.5 m(2)/g) and high nitrogen doping (13.38 %). Moreover, the m-Na-lig-800/PMS system achieved 95.2 % removal of SMX in 120 min with 0.4 g/L catalyst and 0.2 mM PMS at an initial pH of 5.6. The excellent catalytic performance of m-Na-lig-800 was attributed to its abundant active sites, including graphitic N, pyridinic N and other defects. Combined with quenching experiments, electron paramagnetic resonance (EPR) analysis and electrochemical experiments, it suggested that both radical (SO4 center dot-, center dot OH) and non-radicals (O-1(2), electron transfer) contributed to SMX degradation. In addition, m-Nalig-800 also exhibited good reusability and adaptability, and can effectively reduce the toxicity of SMX in water. This study provides a novel and efficient PMS activator based on lignin for water treatment, as well as broadens the idea of resource utilization of dealkalized lignin.