东南大学学报（英文版）2025，Vol.41Issue(3)：348-355,8.DOI:10.3969/j.issn.1003-7985.2025.03.010
掺氮改性厨余垃圾水凝胶生物炭吸附腐殖酸动力学研究
Kinetic adsorption of humic acid by nitrogen-doped food waste hydrogel biochar
摘要
Abstract
Food waste,owing to its high organic content and moisture,offers a more scientifically sound resource utiliza-tion method compared to traditional treatment processes.This study presents a method to convert food waste into nitrogen-doped,modified hydrogel biochar modified food waste hydrogel biochar and investigates its effectiveness in adsorbing humic acid(HA).The modified biochar demon-strates superior adsorption capacity for HA compared to un-modified biochar.The adsorption follows the Langmuir iso-therm model(R2=0.999),achieving a maximum adsorp-tion capacity of 49.5 mg/g with RL=0.001 3-0.005 1(0<RL<1).Furthermore,the adsorption process conforms to a pseudo-first-order model.The mechanism underlying HA adsorption involves the successful modification of food waste hydrogel biochar by 3-Aminopropyltriethoxysilane(APTES).This modification forms Si—R—NH+3 on the biochar surface,which interacts with the COOH—groups in HA through hydrogen bonding and coordination bonds.Some unmodified APTES directly adsorbs onto the biochar surface,undergoing condensation and self-assembly to form ladder-like oligomeric siloxane polymers that enhance HA adsorption.关键词
厨余垃圾/改性生物炭/腐殖酸/吸附机理Key words
food waste/modified biochar/humic acid/ad-sorption mechanism分类
资源环境引用本文复制引用
谈超群,胡军,徐颖,王宣,林小川,李鹏,苏良湖..掺氮改性厨余垃圾水凝胶生物炭吸附腐殖酸动力学研究[J].东南大学学报（英文版）,2025,41(3):348-355,8.基金项目
The National Natural Science Foundation of China(No.52470216),the Natural Science Foundation of Jiangsu Province(No.BK20211175). （No.52470216）
