Physicochemical characterization and adsorption behavior of Ca/Al chloride hydrotalcite-like compound towards removal of nitrate

被引：60

作者：

Islam, Mahamudur ^{[1
]}

Patel, Rajkishore ^{[2
]}

机构：

[1] Purushottam Inst Engn & Technol, Dept Chem, Rourkela 770034, Orissa, India

[2] Natl Inst Technol, Dept Chem, Rourkela 769008, Orissa, India

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2011年 / 190卷 / 1-3期

关键词：

Hydrotalcites; Nitrate; Isotherms; Kinetics; Adsorption; PRESSURE-JUMP TECHNIQUE; AQUEOUS-SOLUTION; CALCINED HYDROTALCITE; ALDOL CONDENSATION; REDUCTION; IRON; CATALYSTS; POWDER; WATER; INTERCALATION;

D O I：

10.1016/j.jhazmat.2011.03.094

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The objective of the present research was to synthesize, characterize and to investigate adsorption of nitrate from synthetic nitrate solution by Ca-Al-Cl HTIc. In the present study Ca-Al-Cl HTIc was synthesized by co-precipitation method and was characterized using SEM, XRD, FTIR and TGA-DSC. To assess the practical usefulness, a detailed removal study of nitrate was carried out. The removal of nitrate was 84.6% under neutral condition using 0.35 g of adsorbent in 100 mL of nitrate solution having initial concentration of 10 mg/L. Adsorption kinetic study revealed that the adsorption process followed first order kinetics. Adsorption data were fitted to linearly transformed Langmuir adsorption isotherm with R(2) (correlation coefficient) > 0.99. Thermodynamic parameters were also calculated to study the effect of temperature on the removal process. In order to understand the adsorption type, equilibrium data were tested with Dubinin-Radushkevich isotherm. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：659 / 668

页数：10

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