改性白兰树叶吸附Cu^(2+)性能研究  

Study on Adsorption of Cu^(2+)by Modified Brandy Leaves

作　　者：舒冉君 汤锐 余乐洹 龚玉莲 佘婷婷 黄更生 邱晚霞 SHU Ran-jun;TANG Rui;YU Le-huan;GONG Yu-lian;SHE Ting-ting;HUANG Geng-sheng;QIU Wan-xia(College of Biology and Food Engineering,Guangdong University of Education,Guangdong Guangzhou 510303,China)

机构地区：[1]广东第二师范学院生物与食品工程学院,广东广州510303

出　　处：《广州化工》2022年第18期63-66,共4页GuangZhou Chemical Industry

基　　金：广州市科技计划(No:202002030475);广东省普通高校特色创新类项目(No:2018KTSCX164,No:2018KQNCX183);大学生创新创业训练计划项目(No:202114278102);广东省普通高校青年创新人才项目(No:2021KQNCX060);广东省普通高校青年创新人才项目(No:2018KQNCX183)。

摘　　要：选取白兰树叶作为原材料,用氢氧化钠和甲醛溶液分别对白兰树叶进行改性,探究温度、pH值、铜离子初始浓度、吸附时间以及吸附剂投加量对于改性白兰树叶吸附铜离子性能的影响。并使用吸附等温模型以及吸附动力学模型进行吸附性能的模型拟合。实验结果表明,氢氧化钠、甲醛改性白兰树叶对铜离子的吸附效率相较于改性前分别可提升37%~100%。两种改性白兰树叶的吸附过程都符合Langmuir和Freundlich等温模型,同时吸附反应过程符合准二级吸附动力学模型。因而,改性白兰树叶的吸附是以化学吸附为主的单分子层吸附与非均质表面吸附过程。Brandy leaves were selected as raw materials and modified with sodium hydroxide and formaldehyde solution respectively to explore the effects of temperature,pH value,initial concentration of copper ion,adsorption time and dosage of adsorbent on the adsorption performance of modified brandy leaves.The adsorption isotherm model and adsorption kinetic model were used to fit the adsorption performance.The experimental results showed that the adsorption efficiency of sodium hydroxide and formaldehyde modified brandy leaves for copper ions can be increased by 37%~100%respectively compared with that before modification.The adsorption processes of the two modified brandy leaves accorded with Langmuir and Freundlich isothermal models,and the adsorption reaction process accorded with the quasi second-order adsorption kinetic model.Therefore,the adsorption of modified brandy leaves was a process of monolayer adsorption and heterogeneous surface adsorption dominated by chemical adsorption.

关 键 词：铜离子 改性白兰树叶 等温吸附模型 吸附动力学模型 

分 类 号：X703[环境科学与工程—环境工程]