高级搜索

磁性海泡石的研制及吸附Cr(Ⅵ)特性

,  ,  , 

downloadPDF

上一篇

下一篇

贾明畅, 戴友芝, 杜婷, 刘川. 磁性海泡石的研制及吸附Cr(Ⅵ)特性[J]. 环境化学, 2011, 30(9): 1546-1552.
引用本文: 贾明畅, 戴友芝, 杜婷, 刘川. 磁性海泡石的研制及吸附Cr(Ⅵ)特性[J]. 环境化学, 2011, 30(9): 1546-1552.
shu
JIA Mingchang, DAI Youzhi, DU Ting, LIU Chuan. PREPARATION OF MAGNETICALLY MODIFIED SEPIOLITE AND ADSORPTION OF HEXAVALENT CHROMIUM[J]. Environmental Chemistry, 2011, 30(9): 1546-1552.
Citation: JIA Mingchang, DAI Youzhi, DU Ting, LIU Chuan. PREPARATION OF MAGNETICALLY MODIFIED SEPIOLITE AND ADSORPTION OF HEXAVALENT CHROMIUM[J]. Environmental Chemistry, 2011, 30(9): 1546-1552.
shu

磁性海泡石的研制及吸附Cr(Ⅵ)特性

  • 1.

    湘潭大学环境科学与工程系, 重金属污染控制湖南省高校重点实验室, 湘潭, 411105

  • 基金项目:

    国家"十一五"水专项湘江课题子课题3(2009ZX07212-001-03)资助.

PREPARATION OF MAGNETICALLY MODIFIED SEPIOLITE AND ADSORPTION OF HEXAVALENT CHROMIUM

  • 1.

    Department of Environmental Science and Engineering, Hunan University Key Laboratory of Heavy Metal Pollution Control, Xiangtan University, Xiangtan, 411105, China

  • Fund Project:

  • 摘要: 为了提高海泡石原土吸附Cr(Ⅵ)性能,解决粉末状海泡石应用中与所处理溶液难以分离的问题,采用化学共沉淀法合成磁性海泡石,利用扫描电镜(SEM)、比表面积和孔径分析仪(BET)、X射线衍射(XRD)、傅里叶红外光谱(IR)、振动样品磁强计(VSM)对附磁前后海泡石进行表征,并考察了磁性海泡石吸附除Cr(Ⅵ)的特性.结果表明,附磁后海泡石表面粗糙多孔,附着明显颗粒物,比表面积由37.534 m2·g-1提高到160.366 m2·g-1,XRD谱图显示存在Fe3O4晶体,含铁量0.28(质量分数)的磁性海泡石磁化率为24.392 emu·g-1;磁性海泡石投加量10 g·L-1,pH 6.0,吸附时间90 min,初始Cr(Ⅵ)浓度50 mg·L-1,温度35 ℃条件下, Cr(Ⅵ)平衡吸附量达3.6 mg·g-1,高于海泡石原土;pH值对其吸附除Cr(Ⅵ)性能影响较大;磁性海泡石对Cr(Ⅵ)的吸附规律符合Freundlich吸附等温式;改性后海泡石比表面积增加,孔容增大及表面铁羟基的形成是其吸附除Cr(Ⅵ)能力增强的主要原因.
    Abstract: Magnetically modified sepiolite(MMS) was prepared by chemical co-precipitation process in order to improve the adsorption performance of sepiolite original soil to Cr(Ⅵ) and tackle the difficulty of separating sepiolite powder from treated solution. Scanning electron microscopy(SEM), specific surface area and pore size analyzer (BET), X-ray diffraction(XRD), Fourier transformed infrared spectrum (FTIR) and vibration sample magnetometer(VSM) were used to characterize sepiolite before and after modification. And adsorption of Cr(Ⅵ) by MMS was also studied. Results indicate that after modification the surface of sepiolite appeared roughened and porous, upon which particles adsorbed. Its surface area increased from 37.534 m2·g-1 to 160.366 m2·g-1. XRD spectra indicate the existence of Fe3O4 crystals. When iron concentration was 0.28, the saturation magnetization of MMS was 24.392 emu·g-1. The adsorption capacity for Cr(Ⅵ) was 3.6 mg·g-1 while the adsorption conditions were as follow: MMS concentration 10 g·L-1, pH 6.0, adsorption time 90 min, Cr(Ⅵ) initial concentration 50 mg·L-1, temperature 35 ℃. pH played a significant role during the adsorption, and the Freundlich isotherm was the best-fit adsorption isotherm model. After modification the surface area and pore volume of MMS increased obviously, and FTIR data demonstrated the formation of iron hydroxyl on magnetic sepiolite surface, which might be the main reason for high adsorption capacity.
  • 加载中
  • [1] 冯秀娟, 王海宁, 普红平. 改性海泡石在环境污染治理中的应用[J]. 环境污染治理技术与设备, 2004, 5(4): 80-83
    [2] 邓庚凤, 罗来涛,陈昭平,等. 海泡石的性能及其应用[J]. 江西科学, 1999, 17(1):59-66
    [3] Gulten Akcay, Mehmet Akcay, Kadir Yurdakoc. Removal of 2,4-dichlorophenoxyacetic acid from aqueous solutions by partially characterized organophilic sepiolite thermodynamic and kinetic calculations[J]. Joumal of Colloid and Interface Science, 2005,281: 27-32
    [4] Sevgi Kocaoba. Adsorption of Cd(Ⅱ),Cr(Ⅲ) and Mn(Ⅱ) on natural sepiolite[J]. Desalination, 2009,244:24-30
    [5] Slavica L, Ivona J, Dusan J. Adsorption of Pb2+,Cd2+ and Sr2+ ions onto natural and acid—activated sepiolites[J]. Appl CZ Sci, 2007, 37(1): 47-57
    [6] 胡忠于, 罗道成,易平贵,等. 改性海泡石对电镀废水中Pb2+、Cu2+、Cd2+的吸附[J]. 材料保护, 2002, 35(5):45-46
    [7] 颜酉斌, 叶艳华,张洪林,等. 改性海泡石对有机污染物氯苯的吸附研究[J]. 非金属矿, 2009, 32(6):64-66
    [8] 弓晓峰, 曹群. 海泡石处理纺织印染废水[J]. 环境与开发, 2000, 15(3):16-17
    [9] 左勤勇,高玉杰. 海泡石滤水问题初探[J]. 天津造纸, 2005, (2):30-33
    [10] 张琦. 海泡石吸附性能研究. 河北:河北工业大学硕士学位论文,2002
    [11] 李彩亭, 肖辰畅,李珊红,等. 海泡石颗粒的制备及其吸附油烟效能的研究[J]. 环境科学与技术, 2006, 29(4):16-18
    [12] 耿明鑫, 刘福田. 水热法制备Fe3O4磁性纳米粒子[J]. 济南大学学报, 2009, 23(2):141-144
    [13] 林阳, 戴丽君,庞燕,等. 原位固化黑荆树皮对Cr(Ⅵ)吸附性能的研究[J]. 安全与环境学报, 2008, 8(1):26-28
    [14] 张巧丽, 高乃云,乐林生,等. 氧化铁/活性炭复合吸附材料去除水中砷的研究[J]. 同济大学学报, 2006, 34(12):1647-1661
  • 加载中
WeChat 点击查看大图
计量
  • 文章访问数:  1255
  • HTML全文浏览数:  1210
  • PDF下载数:  347
  • 施引文献:  0
出版历程
  • 收稿日期:  2010-11-09
贾明畅, 戴友芝, 杜婷, 刘川. 磁性海泡石的研制及吸附Cr(Ⅵ)特性[J]. 环境化学, 2011, 30(9): 1546-1552.
引用本文: 贾明畅, 戴友芝, 杜婷, 刘川. 磁性海泡石的研制及吸附Cr(Ⅵ)特性[J]. 环境化学, 2011, 30(9): 1546-1552.
shu
JIA Mingchang, DAI Youzhi, DU Ting, LIU Chuan. PREPARATION OF MAGNETICALLY MODIFIED SEPIOLITE AND ADSORPTION OF HEXAVALENT CHROMIUM[J]. Environmental Chemistry, 2011, 30(9): 1546-1552.
Citation: JIA Mingchang, DAI Youzhi, DU Ting, LIU Chuan. PREPARATION OF MAGNETICALLY MODIFIED SEPIOLITE AND ADSORPTION OF HEXAVALENT CHROMIUM[J]. Environmental Chemistry, 2011, 30(9): 1546-1552.
shu

磁性海泡石的研制及吸附Cr(Ⅵ)特性

  • 1. 湘潭大学环境科学与工程系, 重金属污染控制湖南省高校重点实验室, 湘潭, 411105
  • 收稿日期:  2010-11-09
基金项目:

国家"十一五"水专项湘江课题子课题3(2009ZX07212-001-03)资助.

摘要: 为了提高海泡石原土吸附Cr(Ⅵ)性能,解决粉末状海泡石应用中与所处理溶液难以分离的问题,采用化学共沉淀法合成磁性海泡石,利用扫描电镜(SEM)、比表面积和孔径分析仪(BET)、X射线衍射(XRD)、傅里叶红外光谱(IR)、振动样品磁强计(VSM)对附磁前后海泡石进行表征,并考察了磁性海泡石吸附除Cr(Ⅵ)的特性.结果表明,附磁后海泡石表面粗糙多孔,附着明显颗粒物,比表面积由37.534 m2·g-1提高到160.366 m2·g-1,XRD谱图显示存在Fe3O4晶体,含铁量0.28(质量分数)的磁性海泡石磁化率为24.392 emu·g-1;磁性海泡石投加量10 g·L-1,pH 6.0,吸附时间90 min,初始Cr(Ⅵ)浓度50 mg·L-1,温度35 ℃条件下, Cr(Ⅵ)平衡吸附量达3.6 mg·g-1,高于海泡石原土;pH值对其吸附除Cr(Ⅵ)性能影响较大;磁性海泡石对Cr(Ⅵ)的吸附规律符合Freundlich吸附等温式;改性后海泡石比表面积增加,孔容增大及表面铁羟基的形成是其吸附除Cr(Ⅵ)能力增强的主要原因.

English Abstract

    全文HTML

参考文献 (14)

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