STUDY OF THE KINETIC AND ADSORPTION ISOTHERM PARAMETERS FOR REMOVING COPPER AND IRON IONS FROM AQUEOUS SOLUTIONS BY USING AGRICALTURAL BY-PRODUCTS.

F. Naief, Mohammed; A. Hamoshi, Ebaa; J. Sadiq, Ahmed; N. Ahmed, Yasir

	STUDY OF THE KINETIC AND ADSORPTION ISOTHERM PARAMETERS FOR REMOVING COPPER AND IRON IONS FROM AQUEOUS SOLUTIONS BY USING AGRICALTURAL BY-PRODUCTS.
iraq journal of market research and consumer protection
Article 1, Volume 9, Issue 2, 2017, Pages 1-9
Authors
Mohammed F. Naief; Ebaa A. Hamoshi; Ahmed J. Sadiq; Yasir N. Ahmed
Abstract
Wheat straw was modified with malonic acid in order to get low cost adsorbent have a good ability to remove copper and ferric ions from aqueous solutions, chemical modification temperature was 120°C and the time was 12 h. Parameters that affect the adsorption experiments were studied and found the optimum pH were 6 and 5 for copper and iron respectively and the time interval was 120 min and the adsorbent mass was 0.1 g. The values for adsorption isotherms parameters were determined according to Langmuir [qmax were 54.64 and 61.7 mg/g while b values were 0.234 and 0.22 mg/l] , Freundlich [Kf were 16.07 and 18.89 mg/g and n were 2.77 and 3.16], Temkin [B were 0.063 and 0.074 j/mol and At were 0.143 and 1.658 l/g] and for Dubinin-Radushkevich [Kad were 3106- and 9107- , qs were 48.42 and 44.70 mg/g, E were 0.408 and 0.745 Kj/mol] for copper and iron ions respectively. The adsorption for both ions are physical since the n values in Freundlich were more than 1, the mean of free energy for Dubinin-Radushkevich were 0.408 and 0.745 Kj/mol and B values for Temkin equation B were 0.063 and 0.074 j/mol.
Keywords
adsorption isotherms; agricultural by; products; thermal modification; Malonic acid

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