改性蔗渣纤维素-海藻酸钙-膨润土微球制备及吸附
Preparation and adsorption of modified bagasse cellulose-calcium alginate-bentonite microspheres
蔡杰慧 1杨英全 2李致宝 1郑燕菲 1莫月香1
作者信息
- 1. 广西民族师范学院化学与生物工程学院,广西崇左 532200
- 2. 南方锰业集团有限责任公司崇左分公司,广西崇左 532200
- 折叠
摘要
以海藻酸钠、硅烷改性蔗渣纤维素为网络框架,膨润土为吸附单元,采用金属离子交联法联合物理包载法制备改性蔗渣纤维素-海藻酸钙-膨润土微球,研究其吸附亚甲基蓝,并阐述吸附机理.采用FT-IR(红外光谱)、SEM(扫描电镜)、BET(比表面积)、XRD(X射线衍射)和TGA(热重分析)分别对微球结构、形貌、孔隙结构、晶相和热性能进行表征.吸附结果显示微球对亚甲基蓝吸附符合准二级吸附动力学模型和Langmuir等温吸附模型,对亚甲基蓝饱和吸附量为523.56 mg/g.经过吸附-脱附5次后,微球吸附能力为85.44％.微球为类球形,表面有丰富的微介孔结构,微球结晶度较好,耐热性能较好,表明微球作为新型无机-有机复合吸附剂,为用于有机染料废水处理提供新思路.
Abstract
Modified bagasse cellulose-calcium alginate-bentonite microspheres were prepared by metal ion crosslinking method combined with physical encapsulation method,with sodium alginate and modified bagasse cellulose as the network framework and bentonite as the adsorption unit.The microspheres adsorption propertie of methylene blue was studied and the adsorption mechanism was explored.The structure,morphology,pore structure,crystal phase and thermal performance of microspheres were characterized by FT-IR,SEM,BET,XRD and TGA,respectively.The adsorption results show that the adsorption process of methylene blue by microspheres conform to pseudo-second-order adsorption kinetic model and Langmuir isothermal adsorption mode,with the maximum adsorption capacity of 523.56 mg/g for methylene blue.After five times of adsorption-desorption,the adsorption capacity of microspheres is 85.44％.The microspheres are spherical-like with abundant micro-mesoporous structures on the surface.The microspheres have good crystallinity and heat resistance.The experimental results show that the microspheres,as a new type of inorganic-organic composite adsorbent,can provide new ideas for treating organic dye wastewater.
关键词
硅烷改性蔗渣纤维素/海藻酸钠/膨润土/吸附/亚甲基蓝Key words
silane modified bagasse cellulose/sodium alginate/bentonite/adsorption/methylene blue引用本文复制引用
基金项目
广西壮族自治区重点研发计划(桂科AB21220027)
广西壮族自治区高等学校中青年教师科研基础能力提升项目(2021KY0773)
广西壮族自治区高等学校中青年教师科研基础能力提升项目(2022KY0768)
广西壮族自治区高等学校中青年教师科研基础能力提升项目(2022KY0769)
广西壮族自治区高等学校中青年教师科研基础能力提升项目(2023KY0797)
崇左市科技计划(崇科攻2022ZC120)
崇左市科技计划(崇科202206083)
广西民族师范学院科研项目(2020YB011)
广西民族师范学院科研项目(2021YB036)
广西民族师范学院科研项目(2021YB038)
广西壮族自治区一流本科专业建设点制药工程项目()
出版年
2024
国家科技期刊平台
NSTL
万方数据