高级搜索

磁性壳聚糖改性硅藻土吸附去除水中的铅离子

,  ,  , 

downloadPDF

上一篇

下一篇

施周, 袁明洋, 杨秀贞, 范少蓓. 磁性壳聚糖改性硅藻土吸附去除水中的铅离子[J]. 环境工程学报, 2017, 11(2): 787-792. doi: 10.12030/j.cjee.201509239
引用本文: 施周, 袁明洋, 杨秀贞, 范少蓓. 磁性壳聚糖改性硅藻土吸附去除水中的铅离子[J]. 环境工程学报, 2017, 11(2): 787-792. doi: 10.12030/j.cjee.201509239
shu
SHI Zhou, YUAN Mingyang, YANG Xiuzhen, FAN Shaobei. Adsorptive removal of Pb2+ using magnetic chitosan modified diatomite[J]. Chinese Journal of Environmental Engineering, 2017, 11(2): 787-792. doi: 10.12030/j.cjee.201509239
Citation: SHI Zhou, YUAN Mingyang, YANG Xiuzhen, FAN Shaobei. Adsorptive removal of Pb2+ using magnetic chitosan modified diatomite[J]. Chinese Journal of Environmental Engineering, 2017, 11(2): 787-792. doi: 10.12030/j.cjee.201509239
shu

磁性壳聚糖改性硅藻土吸附去除水中的铅离子

  • 1.

    湖南大学土木工程学院, 长沙 410082

  • 2.

    湖南大学建筑安全与节能教育部重点实验室, 长沙 410082

  • 基金项目:

    “十二五”国家科技支撑计划资助项目（2012BAJ24B03）

Adsorptive removal of Pb2+ using magnetic chitosan modified diatomite

  • 1.

    College of Civil Engineering, Hunan University, Changsha 410082, China

  • 2.

    Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Hunan University, Changsha 410082, China

  • Fund Project:

  • 摘要: 采用壳聚糖与Fe3O4对硅藻土进行混合改性，制备出一种吸附效果好、且能从液相中磁分离的新型复合吸附剂。通过SEM、XRD、VSM和FTIR等手段对其进行表征，并探究溶液pH、吸附剂投加量以及吸附温度等条件对水溶液中Pb2+吸附效果的影响。结果表明：壳聚糖和Fe3O4都能够负载到硅藻土上面。当溶液pH为5、吸附剂投加量为10 g·L-1、初始浓度为10 mg·L-1时，Pb2+去除率可以达到96.4%。吸附过程较好地符合假二级动力学模型和Langmuir吸附等温模型，热力学数据说明该吸附是吸热、自发的过程。
    Abstract: Diatomite was modified with chitosan and Fe3O4 to obtain a new composite that could not only serve as an effective adsorbent but could also be magnetically separated from an aqueous phase. The new composite was characterized by SEM, XRD, SEM, and FTIR, and its adsorption of Pb2+ was investigated under various initial pH values, adsorbent dosages, and temperatures. The results indicated that both chitosan and Fe3O4 were coated on the diatomite. When the solution pH, initial concentration, and adsorbent dosage were 5, 10 mg·L-1, and 10 g·L-1, respectively, the adsorption efficiency could reach 96.4%. The adsorption was well described by the pseudo-second-order kinetic model and Langmuir adsorption isotherm model. The thermodynamic data showed that the adsorption process was endothermic and spontaneous.
  • 加载中
  • [1] 刘敏敏, 于水利, 候立安. 重金属废水处理技术概述[J]. 中国工程科学, 2014, 16(7):100-105
    [2] 金娜, 印万忠. 铅的危害及国内外除铅的研究现状[J]. 有色矿冶, 2006, 22(S):114-115, 118
    [3] AL-DEGS Y, KHRAISHEH M A M, TUTUNJI M F. Sorption of lead ions on diatomite and manganese oxides modified diatomite[J]. Water Research, 2001, 35(15):3724-3728
    [4] NGAH W S W, HANAFIAH M A K M. Removal of heavy metal ions from wastewater by chemically modified plant wastes as adsorbents:A review[J]. Bioresource Technology, 2008, 99(10):3935-3948
    [5] 朱健, 王平, 雷明婧, 等. 硅藻土理化特性及改性研究进展[J]. 中南林业科技大学学报, 2012, 32(12):61-66
    [6] 刘频, 赵黔榕, 袁朗白, 等. 改性硅藻土对Pb(Ⅱ)的吸附作用[J]. 云南化工, 2003, 30(5):11-13
    [7] 罗道成, 刘俊峰. 改性硅藻土对废水中Pb2+、Cu2+、Zn2+吸附性能的研究[J]. 中国矿业, 2005, 14(7):69-71
    [8] KHRAISHEH M A M, AL-DEGS Y S, MCMINN W A M. Remediation of wastewater containing heavy metals using raw and modified diatomite[J]. Chemical Engineering Journal, 2004, 99(2):177-184
    [9] 韩志刚, 陈卫. 磁性壳聚糖在水处理中的应用[J]. 净水技术, 2009, 28(1):15-19
    [10] 李牧. 壳聚糖的性质及应用研究[J]. 科技信息, 2007(20):52-53
    [11] WANG Jinfeng, TANG Bin, TSUZUKI T, et al. Synthesis, characterization and adsorption properties of superparamagnetic polystyrene/Fe3O4/g raphene oxide[J]. Chemical Engineering Journal, 2012, 204-206:258-263
    [12] DARDER M, COLILLA M, RUIZ-HITZKY E. Biopolymer-clay nanocomposites based on chitosan intercalated in montmorillonite[J]. Chemistry of Materials, 2003, 15(20):3774-3780
    [13] 郭媛媛, 杜显元, 刘亮, 等. 溶液pH对自然水体中多种固相介质吸附铅、镉、铜影响的比较[J]. 吉林大学学报(地球科学版), 2008, 38(3):479-483
    [14] 杨宇翔, 吴介达, 黄忠良, 等. 几种硅藻土的表面电化学性质的研究[J]. 无机化学学报, 1997, 13(1):11-15
    [15] 丁纯梅, 刘群, 曹智一, 等. 壳聚糖对水中铅的吸附性能及动力学研究[J]. 环境与健康杂志, 2007, 24(11):880-882
    [16] 凌静. 硅藻土对废水中Cd2+和Pb2+的吸附性能研究[D]. 衡阳:南华大学, 2013
    [17] LANGMUIR I. The constitution and fundamental properties of solids and liquids[J]. Part I. Solids. Journal of the American Chemistry Society, 1916, 38(11):2221-2295
    [18] FREUNDLICH H M F. Uber die adsorption in Losungen[J]. Zeitschrift for Physikalische Chemie, 1906, 57:385-470
    [19] HUANG Weiya, CHEN Jie, HE Fei, et al. Effective phosphate adsorption by Zr/Al-pillared montmorillonite:Insight into equilibrium, kinetics and thermodynamics[J]. Applied Clay Science, 2015, 104:252-260
    [20] 冯华洋. 镁锰铝复合氧化物的制备及其对Cr(VI)的吸附性能研究[D]. 长沙:湖南大学, 2012
  • 加载中
WeChat 点击查看大图
计量
  • 文章访问数:  2860
  • HTML全文浏览数:  2456
  • PDF下载数:  460
  • 施引文献:  0
出版历程
  • 收稿日期:  2015-11-13
  • 刊出日期:  2017-02-18
施周, 袁明洋, 杨秀贞, 范少蓓. 磁性壳聚糖改性硅藻土吸附去除水中的铅离子[J]. 环境工程学报, 2017, 11(2): 787-792. doi: 10.12030/j.cjee.201509239
引用本文: 施周, 袁明洋, 杨秀贞, 范少蓓. 磁性壳聚糖改性硅藻土吸附去除水中的铅离子[J]. 环境工程学报, 2017, 11(2): 787-792. doi: 10.12030/j.cjee.201509239
shu
SHI Zhou, YUAN Mingyang, YANG Xiuzhen, FAN Shaobei. Adsorptive removal of Pb2+ using magnetic chitosan modified diatomite[J]. Chinese Journal of Environmental Engineering, 2017, 11(2): 787-792. doi: 10.12030/j.cjee.201509239
Citation: SHI Zhou, YUAN Mingyang, YANG Xiuzhen, FAN Shaobei. Adsorptive removal of Pb2+ using magnetic chitosan modified diatomite[J]. Chinese Journal of Environmental Engineering, 2017, 11(2): 787-792. doi: 10.12030/j.cjee.201509239
shu

磁性壳聚糖改性硅藻土吸附去除水中的铅离子

  • 1.  湖南大学土木工程学院, 长沙 410082
  • 2.  湖南大学建筑安全与节能教育部重点实验室, 长沙 410082
  • 收稿日期:  2015-11-13
基金项目:

“十二五”国家科技支撑计划资助项目（2012BAJ24B03）

摘要: 采用壳聚糖与Fe3O4对硅藻土进行混合改性，制备出一种吸附效果好、且能从液相中磁分离的新型复合吸附剂。通过SEM、XRD、VSM和FTIR等手段对其进行表征，并探究溶液pH、吸附剂投加量以及吸附温度等条件对水溶液中Pb2+吸附效果的影响。结果表明：壳聚糖和Fe3O4都能够负载到硅藻土上面。当溶液pH为5、吸附剂投加量为10 g·L-1、初始浓度为10 mg·L-1时，Pb2+去除率可以达到96.4%。吸附过程较好地符合假二级动力学模型和Langmuir吸附等温模型，热力学数据说明该吸附是吸热、自发的过程。

English Abstract

    全文HTML

参考文献 (20)

返回顶部

目录

/

返回文章
返回

Copyright © 2019 中国科学院生态环境研究中心