Author/Authors :
Das، Bodhaditya نويسنده 1Defence Research Laboratory (DRDO), Tezpur, India 2Department of Chemistry, Gauhati University, Guwahati, India , , Rekha Devi، Rashmi نويسنده 1Defence Research Laboratory (DRDO), Tezpur, India , , M Umlong1، Iohborlang نويسنده 1Defence Research Laboratory (DRDO), Tezpur, India , , Borah، Kusum نويسنده 1Defence Research Laboratory (DRDO), Tezpur, India , , Banerjee، Saumen نويسنده , , Kr Talukdar، Anup نويسنده 2Department of Chemistry, Gauhati University, Guwahati, India ,
Abstract :
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 ?G0, ?H0,
?S0 and Ea 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.
