• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >The preparation of a novel iron/manganese binary oxide for the efficient removal of hexavalent chromium [Cr(vi)] from aqueous solutions
【24h】

The preparation of a novel iron/manganese binary oxide for the efficient removal of hexavalent chromium [Cr(vi)] from aqueous solutions

机译：用于从水溶液中有效地除去六价铬[Cr（VI）]的新型铁/锰二元氧化物的制备

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To remove hexavalent chromium Cr(vi) efficiently, a novel Fe-Mn binary oxide adsorbent was prepared via a "two-step method" combined with a co-precipitation method and hydrothermal method. The as-prepared Fe-Mn binary oxide absorbent was characterized via transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectra (FTIR), thermogravimetric analysis (TGA), zeta potential, BET and X-ray photoelectron spectroscopy (XPS). The results indicated that the morphology of the adsorbent was rod-like with length of about 100 nm and width of about 50-60 nm, specific surface area was 63.297 m(2) g(-1), has the composition of alpha-Fe2O3, beta-MnO2 and MnFe2O4 and isoelectric point was observed at pH value of 4.81. The removal of Cr(vi) was chosen as a model reaction to evaluate the adsorption capacity of the Fe-Mn binary oxide adsorbent, indicating that the Fe-Mn binary oxide adsorbent showed high adsorption performance (removal rate = 99%) and excellent adsorption stability (removal rate > 90% after six rounds of adsorption). The adsorption behavior of the Fe-Mn binary oxide was better represented by the Freundlich model (adsorption isotherm) and the pseudo-second-order model (adsorption kinetic), suggesting that the adsorption process was multi-molecular layer chemical adsorption. The possible adsorption mechanism of the Fe-Mn binary oxide for the removal of Cr(vi) included the protonation process and the electrostatic attraction interactions.
机译：为了有效地除去六价铬Cr（VI），通过“两步法”与共沉淀法和水热法相结合制备新型Fe-Mn二元氧化物吸附剂。通过透射电子显微镜（TEM），扫描电子显微镜（SEM），X射线衍射（XRD），傅里叶变换红外光谱（FTIR），热重分析（TGA），X射线衍射（SEM），X射线衍射（TGA）。 Zeta电位，BET和X射线光电子能谱（XPS）。结果表明，吸附剂的形态是棒状，长度为约100nm，宽度约50-60nm，比表面积为63.297m（2）g（-1），具有α-Fe2O3的组成在pH值为4.81时观察到β-mnO2和MnFe2O4和等电点。选择去除Cr（VI）作为模型反应，以评估Fe-Mn二元氧化物吸附剂的吸附能力，表明Fe-Mn二进制氧化物吸附剂显示出高吸附性能（去除率= 99％）和优异的吸附稳定性（六轮吸附后去除率> 90％）。 Fe-Mn二进制氧化物的吸附行为由Freundlich模型（吸附等温线）和伪二阶模型（吸附动力学）表示，表明吸附过程是多分子层化学吸附。用于去除Cr（VI）的Fe-Mn二元氧化物的可能吸附机理包括质子化过程和静电吸引相互作用。

著录项

  • 来源
    《RSC Advances》 |2020年第18期|共12页
  • 作者

    Yang Chuanxi; Ju Tiantian; Wang Xiaoning; Ji Yujia; Yang Cheng; Lv Haojie; Wang Ying; Dong Wenping; Dang Feng; Shi Xifeng; Wang Weiliang; Fan Yuqi;

  • 作者单位

    Shandong Normal Univ Inst Environm &

    Ecol Jinan 250358 Peoples R China;

    Construct Project Environm Assessment Serv Ctr Sh Jinan 250012 Peoples R China;

    Northeastern Univ Sch Mech Engn &

    Automat Shenyang 110819 Peoples R China;

    Univ Vermont Coll Art &

    Sci Burlington VT 05405 USA;

    Shandong Normal Univ Sch Phys &

    Elect Jinan 250014 Peoples R China;

    Shandong Normal Univ Inst Environm &

    Ecol Jinan 250358 Peoples R China;

    Shandong Normal Univ Inst Environm &

    Ecol Jinan 250358 Peoples R China;

    Shandong Acad Environm Sci Co Ltd Jinan 250013 Peoples R China;

    Shandong Univ Key Lab Liquid Solid Struct Evolut &

    Proc Mat Jinan 250061 Peoples R China;

    Shandong Normal Univ Coll Chem Chem Engn &

    Mat Sci Jinan 250014 Peoples R China;

    Shandong Normal Univ Inst Environm &

    Ecol Jinan 250358 Peoples R China;

    Shandong Normal Univ Inst Environm &

    Ecol Jinan 250358 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号