Desorption and Regeneration Characteristics for
Previously Adsorbed Indium Ions to Phosphorylated
Sawdust

Kwon, Taik-Nam; Jeon, Choong

doi:2012.17.2.65

Environmental Engineering Research 2012;17(2): 65-67. DOI: https://doi.org/10.4491/eer.2012.17.2.065

Desorption and Regeneration Characteristics for Previously Adsorbed Indium Ions to Phosphorylated Sawdust

Taik-Nam Kwon, and Choong Jeon^†

Department of Biochemical Engineering, Gangneung-Wonju National University, Gangneung 210-702, Korea

Corresponding Author: Choong Jeon ,Tel: +82-33-640-2405, Fax: +82-33-641-2410, Email: metaljeon@gwnu.ac.kr

Received: January 31, 2012; Accepted: May 11, 2012.

ABSTRACT

The desorption characteristics of previously adsorbed indium ions on phosphorylated sawdust were tested by various chemical reagents such as HCl, HNO₃, NaCl, ethylenediaminetetraacetic acid, and nitrilotriacetic acid. Among them, HCl was chosen as the best desorbing agent in terms of economics. The desorption efficiency of HCl for indium ions was about 97% at a concentration of 0.5 M. The desorption efficiency for indium ions was very high at about 94% even at a solid/liquid ratio of 10.0, and the desorption process was quickly performed within 60 min. The removal efficiency of indium ions in recycled phosphorylated sawdust could be maintained at 85% in the 4th cycle.

Keywords: Desorption | Indium ions | Recovery | Regeneration | Sawdust