多胺型螯合秸秆纤维对水体镉离子的吸附研究  

Adsorption of Cadmium Ions from Aqueous Solution by Polyamine-Type Chelating Straw Fiber

作　　者：彭丹[1] 郑刘春[2] Peng Dan;Zheng Liuchun(School of Traffic ＆ Environment,Shenzhen Institute of Information Technology,Shenzhen 518172;School of Chemistry and Environment,South China Normal University,Guangzhou 510006,China)

机构地区：[1]深圳信息职业技术学院交通与环境学院,广东深圳518172 [2]华南师范大学化学与环境学院,广东广州510006

出　　处：《广东化工》2018年第15期130-132,123,共4页Guangdong Chemical Industry

基　　金：广东省自然科学基金项目(No.2015A030310328);广州市民生科技攻关项目(No.201803030001);深圳市科技计划(No.JCYJ 20160415114215737);深圳信息职业技术学院第六批教育教学研究课题(2016jgqn03);广东省教育厅"创新强校工程"项目(2017GkQNCX068)

摘　　要：本研究以农业废弃物-玉米秸秆来研制多胺型偕胺肟基螯合秸秆纤维,利用SEM、FTIR、BET和元素分析初步表征材料;同时探讨在投加量、溶液pH值以及镉离子初始浓度等影响因素下,材料对水体中镉离子吸附去除效果,并且进行相关的吸附等温线分析,来简要阐明该材料与重金属镉离子之间的吸附机理。结果表明:多胺型偕胺肟基螯合秸秆纤维吸附性能优异,理论最大吸附容量为49.26 mg/g,原因在于它具有较大比表面积和含有丰富的含N官能基团-胺基和偕胺肟基。In this study, polyamine-type chelating straw fiber was developed with agricultural waste-corn stalk, and the material was preliminarily characterized by SEM, FTIR, BET and elemental analysis. The effects of the dosage, the pH value of the solution and the initial concentration of cadmium ion were discussed, and the adsorption isotherms were analyzed. Therefore, the adsorption mechanism was briefly described. The results showed that the adsorption properties of this adsorbents were excellent, which its theoretical maximum adsorption capacity was 49.26 mg/g, due to its large specific surface and rich N functional groups-amido and amidamido groups.

关 键 词：玉米秸秆 螯合 镉离子 吸附 表征 机理 

分 类 号：TQ[化学工程]