新型炭材料（中英文）2026，Vol.41Issue(3)：675-693,19.DOI:10.1016/S1872-5805(26)61081-5
多级孔结构的MgO/生物炭复合材料高效吸附水中Pb(Ⅱ)和Cd(Ⅱ)
A multi-level porous MgO/biochar composite for the highly efficient adsorption of Pb(Ⅱ)and Cd(Ⅱ)from water
摘要
Abstract
A MgO/biochar composite(MBC)with a wide range of pore sizes was prepared by a MgCl2-NaOH co-impregnation method using lavender stalks as the biochar source,which can effectively remove Pb(Ⅱ)and Cd(Ⅱ)from wastewater.The co-impregna-tion treatment resulted in a specific surface area of the MBC that was approximately 54 times greater than that of the biochar derived from untreated stalks.The ion-exchange capacity of MBC was increased by the incorporation of MgO nanoparticles,which increased the alkali metal ion(Mg2+)content.These specific structures and com-positions gave the MBC a high adsorption capacity for Pb(Ⅱ)and Cd(Ⅱ).The adsorption data followed a quasi second-order kinetic model.For Cd(Ⅱ)and Pb(Ⅱ),the maximum adsorption capacities of MBC-700(treated at 700℃for 2 h)reached 520 mg/g and 808 mg/g,respectively.The primary adsorption mechanisms were ion exchange,precipitation,electrostatic at-traction and surface complexation.Furthermore,metallic lead was recovered by using the reducing properties of the biochar at high temperatures.This study provides a reference for developing inexpensive and efficient heavy metal adsorbents and the low-carbonization utilization of biomass waste.关键词
MgO/生物炭复合材料/多级孔结构/Pb(Ⅱ)吸附/Cd(Ⅱ)吸附/吸附机理Key words
MgO/biochar composite/Multi-level pore/Pb(Ⅱ)absorption/Cd(Ⅱ)absorption/adsorption mechanism分类
化学化工引用本文复制引用
张国捷,刘士伟,孙启花,孙君,田宁,吴钊峰,姜黎..多级孔结构的MgO/生物炭复合材料高效吸附水中Pb(Ⅱ)和Cd(Ⅱ)[J].新型炭材料（中英文）,2026,41(3):675-693,19.基金项目
This research was funded by the National Natur-al Science Foundation of China(52563033),Xinjiang Natural Science Fund for Distinguished Young Schol-ars(2022D01E37),Xinjiang Tianshan Talent Project(2024TSYCCX0007),and Key programs of Xinjiang Natural Science Foundation(2022B02051,2023B2045 and 2024LQ01001-3). 中国国家自然科学基金(52563033) （52563033）
新疆杰出青年自然科学基金(2022D01E37) （2022D01E37）
新疆天山英才项目(2024TSYCCX0007) （2024TSYCCX0007）
新疆自然科学基金重点项目(2022B02051、2023B2045、2024LQ01001-3). （2022B02051、2023B2045、2024LQ01001-3）
