2010•Hydrometallurgy of ChinaRequires access

Studies on Adsorption Behavior of 110~* Resin for Copper(II)

Gao Wei-biao

Abstract

The adsorption behavior of 110* resin for Cu(Ⅱ) is investigated.The 110* resin has a good adsorption ability for Cu2+ in the HAc-NaAc medium when pH=4.19.The statically saturated adsorption capacity is 240 mg/g resin. Cu2+ adsorbed on 110* resin can be eluted quantitatively by using 1.0~2.0 mol/L hydrochloric acid as an eluant. The apparent rate constant k298 is of 1.55×10-4s-1. The apparent activation energy is of 37.2 kJ/mol. The adsorption behavior of 110* resin for Cu2+ obeys the Freundlich isotherm.The adsorption thermodynamic parameters ΔH=14.8 kJ/mol,ΔG=-0.7 kJ/mol, ΔS =52.0 J/(mol·K) ,respectively. The adsorption mechanism of 110* resin for Cu2+ is chemical adsorption by chemical analysis and IR spectrometry.

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Key concepts: Adsorption, Chemistry, Copper, Freundlich equation, Elution, Hydrochloric acid, Activation energy, Nuclear chemistry