Chestnut pellicle for the recovery of gold.
Recovery of Au(III) from hydrochloric acid medium by using crosslinked chestnut pellicle (CCP) gel was studied. Strong selectivity was observed for Au(III) showing negligible affinity for other precious metals and some base metal ions tested. The adsorption isotherm study exhibited the maximum loading capacity of the gel as high as 10.6 mol or about 2.1 kg gold per kg dry weight of gel. The reduction of Au(III) ion to elemental form during adsorption process is expected to be the reason of high selectivity and high capacity for Au(III). Kinetic studies at various temperatures confirm an endothermic adsorption process following the pseudo-first order rate law.
Parajuli
Durga
D
Department of Applied Chemistry, Saga University, 1-Honjo, Saga 840-8502, Japan.
Adhikari
Chaitanya Raj
CR
Kawakita
Hidetaka
H
Yamada
Sayaka
S
Ohto
Keisuke
K
Inoue
Katsutoshi
K
D000327:Adsorption; D029962:Fagaceae / Q000737:chemistry*; D006046:Gold / Q000302:isolation & purification*; D006851:Hydrochloric Acid / Q000737:chemistry; D007220:Industrial Waste / Q000517:prevention & control*; D009754:Nuts / Q000737:chemistry*; D014462:Ultrafiltration / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D006046:Gold; D006851:Hydrochloric Acid