摘要
膨润土是一种硅酸盐黏土矿物,在机械、冶金、化工、环保等行业有重要应用.通过改变放电气体种类,放电时间等参数得到不同性能的改性膨润土样品,通过吸附亚甲基蓝试验确定了最佳改性条件.对改性后的膨润土进行了FTIR、SEM和XRD、TGA、BET等分析表征.结果表明,Ar等离子体改性可以提升膨润土的吸附性能.改性后的样品基本骨架保持不变,但比表面积和孔容增大,电位降低.将 10 mg Ar等离子体改性的膨润土置于 200 mL,20 mg/L的亚甲基蓝溶液中,吸附量可达 183 mg/g,而未改性的膨润土的吸附量只有117 mg/g.
Abstract
Bentonite is a silicate clay mineral with important applications in machinery,metallurgy,chemical industry,environmental protection,and other industries.In this paper,different low temperature plasma modified bentonite samples were obtained by changing the discharge parameters,such as the type of discharge gas,discharge time,etc.The optimal mod-ification conditions were determined after the experiment of adsorption of methylene blue.The modified bentonite samples were characterized by FTIR,XRD,SEM,TGA,BET,etc.The results show that the specific surface area and pore volume in-creased,and the potential value decreased after plasma modification,while the basic structure of the modified samples did not change.The adsorption performance of bentonite sample was evaluated for methylene blue adsorption.Under certain condi-tion of 10 mg Ar plasma-modified bentonite,200 mL of 20 mg/L methylene blue solution,the equilibrium adsorption was as high as 183 mg/g,while the adsorption of unmodified bentonite was only 117 mg/g.Argon plasma modification can improve the adsorption performance of bentonite to methylene blue.
基金项目
中国国家自然科学基金(12075032)
北京市级大学生创新创业计划项目(S202310015043)
云南省刑事科学技术重点实验室开放课题(YNPC-S2021002)
北京印刷学院项目(21090123007)
NETL
NSTL
维普
万方数据