摘要
将改进Hummer′s法合成的氧化石墨烯(GO)用于水中罗丹明B(RB)的去除,探讨了pH值、吸附剂质量、吸附时间、离子强度以及共存离子对吸附性能的影响,并对吸附动力学和吸附机理进行分析。结果表明,强碱不利于GO对RB的吸附,离子强度的增大和共存离子的存在也会抑制GO对RB的吸附。GO对RB的吸附速率主要受电化学吸附控制,RB在GO表面的扩散过程涉及复杂的吸附机理,但其分布则主要呈均匀的单分子层分布。
Graphene oxide(GO)synthesized by modified Hummer′s method was used for the removal of rhodamine B(RB)in water.The effects of pH value,adsorbent mass,adsorption time,ionic strength and co-existing ions on the adsorption properties were investigated,and the adsorption kinetics and adsorption mechanism were investigated.The results show that strong alkali is not conducive to the adsorption of RB,and the increase of ionic strength and the presence of coexisting ions can inhibit the adsorption of RB by GO.The adsorption rate of GO on RB is mainly controlled by electrochemical adsorption.The diffusion process of RB on the GO surface involves complex adsorption mechanism,but the distribution of RB on the GO surface is mainly uniform monolayer distribution.
作者
郭才兰
李俊燕
王迁
GUO Cailan;LI Junyan;WANG Qian(School of Chemistry and Materials,Weinan Teachers University,Weinan 714099,China;Key Laboratory for Ecology and Environment of River Wetlands in Shaanxi Province,Weinan 714099,China)
出处
《化工科技》
CAS
2022年第1期33-38,共6页
Science & Technology in Chemical Industry
基金
国家级大学生创新创业训练计划项目(S202010723018)
陕西省教育厅项目(19JS030)
渭南市科技计划项目(2019-ZDYF-JCYJ-135)
渭南师范学院人才项目(18ZRRC09)。
关键词
氧化石墨烯
罗丹明B
吸附机理
离子间相互作用
水处理
Graphene oxide
Rhodamine B
Adsorption mechanism
Interionic interaction
Water treatment
