Arsenic (III) adsorption on iron acetate coated activated alumina: thermodynamic, kinetics and equilibrium approach

被引：16

作者：

Das, Bodhaditya ^{[1
,2
]}

Devi, Rashmi Rekha ^{[1
]}

Umlong, Iohborlang M. ^{[1
]}

Borah, Kusum ^{[1
]}

Banerjee, Saumen ^{[1
]}

Talukdar, Anup Kr ^{[2
]}

机构：

[1] DRDO, Def Res Lab, Tezpur, India

[2] Gauhati Univ, Dept Chem, Gauhati, India

来源：

JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING | 2013年 / 11卷

关键词：

Arsenic; Iron acetate; Activated alumina; Adsorption; Kinetic; Equilibrium; AQUEOUS-SOLUTIONS; WEST-BENGAL; REMOVAL; AS(III); GROUNDWATER; SORPTION; WATER; CHEMISTRY; FLUORIDE; OXIDES;

D O I：

10.1186/2052-336X-11-42

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorption potential of iron acetate coated activated alumina (IACAA) for removal of arsenic [As (III)] as arsenite by batch sorption technique is described. IACAA was characterized by XRD, FTIR, EDAX and SEM instruments. Percentage adsorption on IACAA was determined as a function of pH, contact time and adsorbent dose. The study revealed that the removal of As (III) was best achieved at pH = 7.4. The initial As (III) concentration (0.45 mg/L) came down to less than 0.01 mg/L at contact time 90 min with adsorbent dose of 1 g/100 mL. The sorption was reasonably explained with Langmuir and Freundlich isotherms. The thermodynamic parameters such as Delta G(0), Delta H-0, Delta S-0 and E-a were calculated in order to understand the nature of sorption process. The sorption process was found to be controlled by pseudo-second order and intraparticle diffusion models.

引用

页数：10

共 37 条

[1]

Acharyya SK, 2002, CURR SCI INDIA, V82, P740

[2]

BENJAMIN M.M., 1981, ADSORPTION SOLUTIONS, P41

[3] Adsorption of Pb and Cd onto metal oxides and organic material in natural surface coatings as determined by selective extractions: new evidence for the importance of Mn and Fe oxides [J].