10.28936 STUDY OF THE KINETIC AND ADSORPTION ISOTHERM PARAMETERS FOR REMOVING COPPER AND IRON IONS FROM AQUEOUS SOLUTIONS BY USING AGRICALTURAL BY-PRODUCTS.

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

  • Mohammed F. Naief
  • Ebaa A. Hamoshi
  • Ahmed J. Sadiq
  • Yasir N. Ahmed
Keywords: adsorption isotherms, agricultural by-products, thermal modification, malonic acid

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 3*106- and 9*107- , 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.

Author Biographies

Mohammed F. Naief

1Basic Sciences Section, College of Agriculture, University of Baghdad, Iraq,

Ebaa A. Hamoshi

2Basic Sciences Section, College of Agriculture, University of Baghdad, Iraq

Ahmed J. Sadiq

3Basic Sciences Section, College of Agriculture, University of Baghdad, Iraq

Yasir N. Ahmed

Dr.Department of chemistry, college of medicine, Fallujah University

Published
2017-04-17