Cd^(2+)在改性橙皮上的吸附及其动力学  

Study on the Adsorption of Cd^(2+) in Aqueous Solution by Modified Orange Peel and its Biosorption Kinetics

作　　者：杨为森 简绍菊 林维晟 YANG Weisen JIAN Shaoju LIN Weisheng(Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, Wuyishan 354300, China Fujian Provincial Bamboo Engineering Technology Reserach Center, Wuyishan 354300, China College of Ecology and Resources Engineering, Wuyi University, Wuyishan 354300, China)

机构地区：[1]福建省生态产业绿色技术重点实验室,福建武夷山354300 [2]福建省竹材工程技术研究中心,福建武夷山354300 [3]武夷学院生态与资源工程学院,福建武夷山354300

出　　处：《重庆理工大学学报（自然科学）》2017年第9期103-109,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：福建省科技厅区域重大项目(2012Y3008);福建省科技厅资助项目(JK2011058);福建省大学生创新创业训练项目(201510397033);武夷学院一般项目(XL201301);武夷学院校级科研基金(XL201402)

摘　　要：以橙皮为基体,经环氧氯丙烷和氢氧化钠改性处理制备橙皮生物质吸附剂,用红外光谱及SEM对改性橙皮结构及形貌进行表征,研究了改性橙皮对Cd^(2+)溶液的吸附性能,考察了Cd^(2+)溶液的pH值、初始浓度、吸附时间和吸附剂用量等对吸附效果的影响。结果表明:当Cd^(2+)溶液初始浓度为100 mg/L、pH=6、吸附时间为60 min、投加量为0.2 g时,在室温条件下,改性橙皮对Cd^(2+)的去除率和吸附容量分别为90%和11.03 mg/g;改性橙皮对Cd^(2+)的等温吸附平衡符合Langmuir模型,以单层化学吸附为主;对Cd^(2+)的吸附动力学符合准二级动力学方程。Orange peel was modified by epichlorohydrin and sodium hydroxide to obtain an orange peel absorbent.The morphology and structure of modified orange peel were characterized by FTIR and SEM,and the absorption of modified orange peel on Cd^（2＋） solution was studied.The effects of initial pH,initial concentration,absorbent dosage and reaction time on the adsorption efficiencies of Cd^（2＋） were investigated.The result showed that the adsorption of Cd^（2＋） was the best when the initial pH was 6,initial concentration was 100 mg/L,absorbent dosage was 0.2g and reaction time was 60 min in room temperature,the decolorization rate and absorption capacity of Cd^（2＋） were about 90% and 11.03mg/g respectively.The experimental isotherm data fits well in the Langmuir equations,indicating monolayer chemical adsorption on the absorbent.The adsorption process can be well described by the pseudo-second-order kinetic equation.

关 键 词：橙皮 生物质吸附剂 Cd2+溶液 环氧氯丙烷 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]