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

Journal of Environmental Health Science Engineering

Anup Kr Talukdar²  Saumen Banerjee¹  Kusum Borah¹  Iohborlang M Umlong¹  Rashmi Rekha Devi¹  Bodhaditya Das² 

[1] Defence Research Laboratory (DRDO), Tezpur, India;Department of Chemistry, Gauhati University, Guwahati, India

关键词: Equilibrium;    Kinetic;    Adsorption;    Activated alumina;    Iron acetate;    Arsenic;   

Others  :  811332
DOI  :  10.1186/2052-336X-11-42

 received in 2012-08-14, accepted in 2013-09-29,  发布年份 2013

【 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 ΔG⁰, ΔH⁰, ΔS⁰ 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.

【 授权许可】

   
2013 Das et al.; licensee BioMed Central Ltd.

【 图 表 】

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