硅酸盐通报2025，Vol.44Issue(5)：1888-1898,1938,12.DOI:10.16552/j.cnki.issn1001-1625.2024.1306
酸改性坡缕石对Cu2+的吸附性能研究
Research on Adsorption Performance of Acid Modified Palygorskite for Cu2+
摘要
Abstract
Palygorskite is a hydrous magnesium-aluminum-silicate clay mineral,featuring a distinctive chain-layered crystal structure.It demonstrates outstanding application performance in numerous domains such as colloids,catalysis,and adsorption.In this research,various types of acids were employed to modify palygorskite,regulating its structure by dissolving the cations in the octahedral layer.With Cu2+as the target contaminant,the effect laws of diverse modification conditions on the adsorption of Cu2+by palygorskite were investigated via static adsorption experiments.The structures of palygorskite before and after modification were characterized via X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),scanning electron microscopy(SEM),N2 adsorption,solid-state nuclear magnetic resonance(NMR),and thermogravimetry(TG).The research findings indicate that after acid modification,the impurities in palygorskite decrease and micropore volume increases,significantly enhancing the adsorption capacity for Cu2+.Moreover,the HCl modified palygorskite achieves the best adsorption effect under the conditions of a reaction time of 120 min,a reaction temperature of 60 ℃ and a solution pH value of 7,and maximum adsorption capacity is 70.64 mg/g.The results of this study hold significant research implications for the application of palygorskite in the field of environmental governance.关键词
坡缕石/Cu2+/吸附性能/酸改性/晶体结构/吸附条件/水污染Key words
palygorskite/Cu2+/adsorption performance/acid modification/crystal structure/adsorption condition/water pollution分类
环境科学引用本文复制引用
吴丽梅,栾奕,王晓龙,唐宁,李甘宁,雷馨宇..酸改性坡缕石对Cu2+的吸附性能研究[J].硅酸盐通报,2025,44(5):1888-1898,1938,12.基金项目
国家自然科学基金(42202042) （42202042）
辽宁省教育厅项目(LJ212410153043) （LJ212410153043）
