Flower-, wire-, and sheet-like MnO2-deposited diatomites: Highly efficient absorbents for the removal of Cr(VI)

被引：72

作者：

Du, Yucheng ^{[1
]}

Wang, Liping ^{[1
]}

Wang, Jinshu ^{[1
]}

Zheng, Guangwei ^{[1
]}

Wu, Junshu ^{[1
]}

Dai, Hongxing ^{[2
]}

机构：

[1] Beijing Univ Technol, Coll Mat Sci & Engn, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China

[2] Beijing Univ Technol, Dept Chem & Chem Engn, Coll Environm & Energy Engn, Lab Catalysis Chem & Nanosci, Beijing 100124, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2015年 / 29卷

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

Morphological effect; MnO2-deposited diatomite; Cr(VI) removal; Adsorption efficiency; AQUEOUS-SOLUTIONS; NANOFIBROUS MEMBRANE; ACTIVATED CARBON; HEAVY-METALS; WASTE-WATER; ION REMOVAL; ADSORPTION; CHROMIUM(VI); CHEMISTRY; EQUILIBRIUM;

D O I：

10.1016/j.jes.2014.06.047

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Flower-, wire-, and sheet-like MnO2-deposited diatomites have been prepared using a hydrothermal method with Mn(Ac)(2), KMnO4 and/or MnSO4 as Mn source and diatomite as support. Physical properties of the materials were characterized by means of numerous analytical techniques, and their behaviors in the adsorption of chromium(VI) were evaluated. It is shown that the MnO2-deposited diatomite samples with different morphologies possessed high surface areas and abundant surface hydroxyl groups (especially the wire-like MnO2/diatomite sample). The wire-like MnO2/diatomite sample showed the best performance in the removal of Cr(VI), giving the maximum Cr(VI) adsorption capacity of 101 mg/g. (C) 2014 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences.

引用

页码：71 / 81

页数：11

共 51 条

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