深圳大学学报（理工版）2026，Vol.43Issue(2)：127-138,12.DOI:10.3724/SP.J.1249.2026.02127
氨基化纤维基生物质吸附剂吸附铜离子的机理
Mechanism of Cu(Ⅱ)adsorption from water by an aminated fiber-based bio-adsorbent
摘要
Abstract
To develop a low-cost and renewable fiber-based biomass adsorbent for efficient removal of copper from wastewater,alligator weed(Alternanthera philoxeroides)was used as the biomass substrate and graft-modified with epichlorohydrin and diethylenetriamine in an N,N-dimethylformamide medium.An aminated network-crosslinked fiber-based adsorbent,namely modified Alternanthera philoxeroides(MAP),was thereby prepared.The material structure and surface properties were comprehensively characterized using morphology observation,functional-group identification,crystal structure analysis,and surface chemical-state analysis.The adsorption behavior of MAP toward Cu2+in water was systematically investigated,focusing on the effects of adsorbent dosage,contact time,solution pH,initial concentration,and temperature.The results showed that the modified material exhibited a rough and porous surface compared with the relatively smooth pristine biomass.Under the conditions of an initial Cu2+concentration of 100 mg/L,MAP dosage of 5 g/L,pH 5.5,temperature of 298 K,and contact time of 180 min,the equilibrium adsorption capacity and removal efficiency reached 19.33 mg/g and 95.57%,respectively.Kinetic and isotherm analyses indicated that the adsorption process followed the pseudo-second-order model and the Langmuir isotherm model,with a maximum Langmuir monolayer adsorption capacity of 58.56 mg/g at 298 K.Thermodynamic parameters(ΔG<0 and ΔH>0)revealed that the adsorption was spontaneous and endothermic.Combined analysis of adsorption behavior and changes in surface functional groups and chemical states indicated that Cu2+removal was mainly attributed to amino-group coordination complexation.Regeneration experiments demonstrated good reusability of the adsorbent,with the removal efficiency remaining≥72.06%after six adsorption-desorption cycles.This study provides a promising low-cost and renewable fiber-based biomass adsorbent option for the treatment of copper-containing wastewater.关键词
重金属废水/生物质/空心莲子草/二乙烯三胺/吸附去除/铜离子/接枝改性/配位络合Key words
heavy-metal wastewater/biomass/Alternanthera philoxeroides/diethylenetriamine(DETA)/adsorption removal/copper ions/graft modification/coordination complexation分类
化学化工引用本文复制引用
屈伟,唐倬云,陈嘉平..氨基化纤维基生物质吸附剂吸附铜离子的机理[J].深圳大学学报（理工版）,2026,43(2):127-138,12.基金项目
National Science and Technology Major Project of China(2025ZD1204700) （2025ZD1204700）
National Natural Science Foundation of China(52470010,523B2098) （52470010,523B2098）
Guangdong Provincial Young Innovative Talents Program for Universities(2025KQNCX071) （2025KQNCX071）
Start-up Fund for High-Level Talents of Shenzhen University(827-000811) （827-000811）
Scientific Foundation for Youth Scholars of Shenzhen University(868-000001033353) 国家科技重大专项基金资助项目(2025ZD1204700) （868-000001033353）
国家自然科学基金资助项目(52470010,523B2098) （52470010,523B2098）
广东省普通高校青年创新人才项目资助项目(2025KQNCX071) （2025KQNCX071）
深圳大学高层次人才科研启动经费资助项目(827-000811) （827-000811）
深圳大学青年教师科研启动经费资助项目(868-000001033353) （868-000001033353）
