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Titolo:
Adsorption of cadmium and strontium on cellulose/alginic acid ion-exchangemembrane
Autore:
Zhang, LN; Zhou, JP; Zhou, DC; Tang, YR;
Indirizzi:
Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China Wuhan Univ Wuhan Peoples R China 430072 m, Wuhan 430072, Peoples R China Wuhan Univ, Ctr Anal & Testing, Wuhan 430072, Peoples R China Wuhan Univ Wuhan Peoples R China 430072 g, Wuhan 430072, Peoples R China
Titolo Testata:
JOURNAL OF MEMBRANE SCIENCE
fascicolo: 1-2, volume: 162, anno: 1999,
pagine: 103 - 109
SICI:
0376-7388(19990901)162:1-2<103:AOCASO>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
SELECTIVE TRANSPORT; METAL-IONS; SORPTION; CUOXAM;
Keywords:
ion-exchange membrane; adsorption; toxic metal ions; adsorbed amount; ion-exchange capacity; cellulose/alginic acid blend;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Zhang, LN Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China Wuhan UnivWuhan Peoples R China 430072 30072, Peoples R China
Citazione:
L.N. Zhang et al., "Adsorption of cadmium and strontium on cellulose/alginic acid ion-exchangemembrane", J MEMBR SCI, 162(1-2), 1999, pp. 103-109

Abstract

Cellulose/alginic acid (RC-AC) ion-exchange membrane was prepared by coagulating a blend of cellulose cuoxam and alginate solution. The RC-AC membrane was used satisfactory for the adsorption of Cd2+ and Sr2+ ions. The effects of ion concentrations, ionic strength, pH, adsorption time, desorption time and species of complexing agents on adsorbed amount (c(A)) of the RC-ACmembrane were studied by a batch method, and the metal ions concentrationswere measured with atomic absorption spectrophotometer (AAS). The c(A) values of Cd2+ and Sr2+ On the membrane were 0.79 meg g(-1) at pH 5.8, and 0.75 meg g(-1) at pH 6.0, respectively. After adding EDTA or oxalic acid, the c(A) values of Cd2+ and Sr2+ in the solution including Cu2+ and Fe3+ were much larger than those of Cu2+ and Fe3+, and the EDTA was more efficient in the enhancement of the c(A) values of Cd2+ and Sr2+ than oxalic acid. In this case (EDTA), the selectivity of the metal ions adsorbed into the membrane was in the order of Sr2+ > Cd2+ > Fe3+ > Cu2+. Th, preparation of RC-AC membrane is simple and less expensive. (C) 1999 Elsevier Science B.V. All rights reserved.

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Documento generato il 25/09/20 alle ore 22:49:09