Lead and cadmium removal by adsorption process using hydroxyapatite porous materials

被引：32

作者：

Ramdani, Amina ^{[1
]}

Kadeche, Abdelkader ^{[1
]}

Adjdir, Mehdi ^{[2
]}

Taleb, Zoubida ^{[3
]}

Ikhou, Djamila ^{[1
]}

Taleb, Safia ^{[3
]}

Deratani, Andre ^{[4
]}

机构：

[1] Univ Dr Moulay Tahar, Fac Sci, Dept Chem, Saida 20000, Algeria

[2] Univ Dr Moulay Tahar, Fac Technol, Dept Engn Proc, Saida 20000, Algeria

[3] Univ Djillali Liabes Sidi Bel Abbes, Fac Exact Sci, Lab Mat & Catalysis, Site 1,BP 89, Sidi Bel Abbes 22000, Algeria

[4] IEMIUM2, Pl Eugene Bataillon,Case Courrier 047, F-34095 Montpellier 5, France

来源：

WATER PRACTICE AND TECHNOLOGY | 2020年 / 15卷 / 01期

关键词：

adsorption; heavy metals; porous hydroxyapatite; wastewater;

D O I：

10.2166/wpt.2020.003

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

This contribution is a comparison study between synthetic hydroxyapatite (Sy-HAP) and commercial hydroxyapatite (C-HAP) for the removal of Pb2+ and Cd2+ ions present in wastewater from industrial effluents. The obtained results show that the equilibrium time required for complete adsorption of Pb2+ and Cd2+ ions on C-HAP and Sy-HAP is 15 min for both. The obtained removal efficiencies for Sy-HAP are 95.52% and 90.91% for Pb2+ and Cd2+ ions, respectively. Whereas, C-Hap presents lower removal efficiencies of 86.53% and 81.43% for Pb2+ and Cd2+ ions, respectively. Maximum adsorption was observed at pH 5; at lower pH levels adsorption was less. The experimental kinetic data fitted with the second order kinetic model. Thermodynamically, the adsorption process was endothermic and spontaneous in nature. Isotherm adsorption studies indicated that Langmuir, Freundlich and Temkin are the most valid models to describe and evaluate the adsorption process. The EDX results also confirmed the presence of lead and cadmium in adsorbents after adsorption. Finally, the HAP porous materials possess great potential for the removal of Pb2+ and Cd2+ ions from aqueous solutions and wastewater from industrial effluents.

引用

页码：130 / 141

页数：12

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