Preparation of CaO loaded mesoporous Al2O3: Efficient adsorbent for fluoride removal from water

被引：107

作者：

Dayananda, Desagani ^{[1
]}

Sarva, Venkateswara R. ^{[2
]}

Prasad, Sivankutty V. ^{[3
]}

Arunachalam, Jayaraman ^{[2
]}

Ghosh, Narendra N. ^{[1
]}

机构：

[1] Birla Inst Technol & Sci Pilani, Dept Chem, Nanomat Lab, Zuarinagar 403726, Goa, India

[2] Bhabha Atom Res Ctr, Natl Ctr Composit Characterizat Mat CCCM, Hyderabad 500062, Andhra Pradesh, India

[3] NIIST, CSIR, Chem Sci & Technol Div, Thiruvananthapuram 695019, Kerala, India

来源：

CHEMICAL ENGINEERING JOURNAL | 2014年 / 248卷

关键词：

Mesoporous alumina; Calcium oxide; Fluoride removal; Adsorption isotherm; Adsorption kinetics; AQUEOUS-SOLUTIONS; DRINKING-WATER; ADSORPTION; DEFLUORIDATION; ALUMINA; ION; SORPTION; CALCITE; NICKEL;

D O I：

10.1016/j.cej.2014.03.064

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this paper, we report a simple chemical method for the preparation of CaO loaded mesoporous Al2O3 based adsorbents, which can be used for fluoride removal from water. The synthesized adsorbents were characterized by using powder X-ray diffractometer, N-2 adsorption-desorption surface area and pore size analyzer and high resolution transmission electron microscope. CaO loaded mesoporous aluminas exhibited poor crystalline mesoporous structure having gamma-Al2O3 phase. The fluoride removal capacities of the synthesized adsorbents were evaluated using batch adsorption studies. Kinetic data revealed that, the fluoride sorption on 20 wt.% CaO loaded mesoporous Al203 was rapid, and similar to 90% fluoride removal was achieved within 15 min. CaO loaded mesoporous Al2O3 showed higher fluoride adsorption capacity (137 mg/g) and faster kinetics than mesoporous Al2O3. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：430 / 439

页数：10

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