环境工程学报2026，Vol.20Issue(7)：2095-2109,15.DOI:10.12030/j.cjee.202512057
矿渣基碳粉-海藻酸钠复合膜的制备及其对水体中Cr(Ⅵ)的高效吸附
Preparation of a slag-based carbon powder-sodium alginate composite membrane with high efficiency for Cr(VI)adsorption in water
摘要
Abstract
Sodium alginate was used as the matrix to load self-made slag-purified carbon powder,and a new type of slag-based carbon powder-sodium alginate composite membrane was prepared through double crosslinking with polyethyleneimine and glutaraldehyde.The aim was to treat waste with waste,to promote the value of slag as a resource,and to develop highly efficient and renewable adsorption materials to deal with Cr(Ⅵ)pollution in water.The adsorption performance,regeneration ability and applicability of the composite membrane for Cr(Ⅵ)to simulated wastewater were systematically investigated.The results showed that the adsorption capacity was the best at pH=2.The adsorption equilibrium can be reached in about 73 h with increasing temperature and initial Cr(Ⅵ)mass concentration.The adsorption process conformed to the pseudo-second-order kinetics and Langmuir model,and the theoretical maximum adsorption capacity of Cr(Ⅵ)was 471.970 mg·g−1.The thermodynamic analysis showed that the adsorption was a spontaneous endothermic reaction.In the simulated wastewater containing a variety of metal ions,the competitive effect had a certain influence on the adsorption performance.After three adsorption-desorption cycles,the adsorption capacity of the composite membrane decreased,but it still maintained good structural stability.The characterizations of SEM-EDS,FTIR and XPS showed that the structureof the material was porous and functional groups(—COOH,—NH2,etc.)were involved in the adsorption,and some Cr(Ⅵ)was reduced to Cr(Ⅲ),which confirmed that the adsorption of Cr(Ⅵ)by the composite membrane was the result of electrostatic binding and the synergistic effect of chemical coordination and redox.关键词
海藻酸钠/自制碳粉/铬/吸附性能/复合材料/聚乙烯亚胺Key words
sodium alginate/self-made carbon powder/chromium/adsorption performance/composite materials/polyethyleneimine分类
资源环境引用本文复制引用
陈秋怡,张喆,霍强,莫雅圆..矿渣基碳粉-海藻酸钠复合膜的制备及其对水体中Cr(Ⅵ)的高效吸附[J].环境工程学报,2026,20(7):2095-2109,15.基金项目
广西科技计划项目(桂科AD21220135) （桂科AD21220135）
桂林市创新平台和人才计划(20210218-4) （20210218-4）
