期刊
REACTIVE & FUNCTIONAL POLYMERS
卷 43, 期 1-2, 页码 1-6出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1381-5148(98)00082-0
关键词
nickel; ion-exchange; iminodiacetate; chelating resin
The distribution coefficient (K-D) of trace nickel on an iminodiacetate-chelating resin Chelex 100 increased with pH to a peak value close to 2 000 000 ml/g at pH of about 5. At higher pH values the K-D dropped to 5000 ml/g due to competition of an unidentified complexing agent, in equilibrium of three-component Na/H/Ni ion-exchange system, H/Ni exchange was found to be dominant in the pH range up to 8 and in Na concentration up to 6 mol/l. The practical ion-exchange capacity for nickel was 2.15 mmol/g (4.3 meq/g). (C) 2000 Elsevier Science B.V. All rights reserved.
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