土木与环境工程学报（中英文）2026，Vol.48Issue(4)：243-254,12.DOI:10.11835/j.issn.2096-6717.2024.083
碱性富硅生物炭基复合材料吸附Cu(Ⅱ)、Zn(Ⅱ)的机理
Adsorption mechanism of Cu(Ⅱ)and Zn(Ⅱ)on alkaline silica-enriched biochar composites
摘要
Abstract
Heavy metal contamination stemming from industrial waste is an increasingly grave issue with extensive repercussions for human health and ecological environment.Biochar has been demonstrated to have significant potential in the remediation of heavy metal pollution.However,the effectiveness of raw biochar is constrained under conditions of low pH and high heavy metal concentrations.In order to address this challenge effectively,this study utilized dragon fruit peels as precursors to prepare biochar via pyrolysis at 500 ℃ for 2 hours.The development of an efficient green adsorbent termed GBMSs(green biochar-metakaolin-sodium silicate)has been accomplished.Response surface methodology(RSM)tests revealed that GBMSs exhibited exceptional adsorption performance for zinc,achieving up to 67.37 mg/L at pH=2.Kinetic and isothermal adsorption studies indicated that adsorption of Cu and Zn onto GBMSs closely followed the Langmuir model and the pseudo-second-order kinetic equation,suggesting homogeneous monolayer surface adsorption with a rapid adsorption rate,and the adsorption capacity increased with rising pH.In-depth analysis using XRD and SEM-EDS techniques identified chemisorption as the primary adsorption mechanism,with ion exchange,surface complexation,and co-precipitation playing significant roles.These findings confirm that GBMSs,as an environmentally friendly and efficient adsorbent,holds considerable promise for the treatment of heavy metal pollution.关键词
生物炭/重金属/吸附动力学/等温线模型/吸附机理Key words
biochar/heavy metals/adsorption kinetics/isotherm model/adsorption mechanism分类
资源环境引用本文复制引用
黄俊峰,俞缙,罗金志,蔡燕燕,严健辉..碱性富硅生物炭基复合材料吸附Cu(Ⅱ)、Zn(Ⅱ)的机理[J].土木与环境工程学报（中英文）,2026,48(4):243-254,12.基金项目
国家自然科学基金(52278351) National Natural Science Foundation of China(No.52278351) （52278351）
