Kinetics of removal of chromium from water and electronic process wastewater by ion exchange resins: 1200H, 1500H and IRN97H.
The removal of chromium from aqueous solution by an ion exchange resin is described. Ion exchange resins 1200H, 1500H and IRN97H show a remarkable increase in sorption capacity for chromium, compared to other adsorbents. The adsorption process, which is pH dependent show maximum removal of chromium in the pH range 2-6 for an initial chromium concentration of 10mg/l. The metal ion adsorption obeyed linear, Langmuir and Freundlich isotherms. The adsorption of chromium on these cation exchange resins follows first-order reversible kinetics and pseudo-first-order kinetics. The intraparticle diffusion of chromium on ion exchange resins represents the rate-limiting step. The uptake of chromium by the ion exchange resins was reversible and thus have good potential for the removal/recovery of chromium from aqueous solutions. We conclude that such ion exchange resins can be used for the efficient removal of chromium from water and wastewater.
Rengaraj
S
S
School of Chemical Engineering, Seoul National University, San 56-1, Shillim-dong, Kwanak-gu, 151-742, Seoul, South Korea
Joo
Cheol Kyun
CK
Kim
Younghun
Y
Yi
Jongheop
J
D000327:Adsorption; D002857:Chromium / Q000737:chemistry / Q000302:isolation & purification*; D004581:Electronics; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007475:Ion Exchange Resins / Q000737:chemistry*; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*; D014873:Water Pollutants / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D007475:Ion Exchange Resins; D014873:Water Pollutants; D002857:Chromium