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نوع المنشور

بحث أصيل

المؤلفون

النص الكامل

تحميل

This study aims to use the tissues of Cyclamen persicum tubers to prepare activated carbon

(CTAC) by different methods then to set up a thermodynamic study of the pharmaceutical diclofenac

sodium (DCF) adsorption from aqueous solution onto this activated carbon. Optimum

percent of DCF removal was 72% when CTAC dosage was 0.25 g and DCF concentration

50 mg/L. Percentage removal of DCF increases when the concentration of DCF increases as the

maximum percentage removal reached 81% when DCF concentration was 70 mg/L and 0.7 g

CTAC and pH ranging from 6 to 2.

Freundlich model describes efﬁciently adsorption isotherm of DCF onto CTAC with n equal to

1.398 whose value indicates a favorable adsorption. This ﬁnding validates the assumption of multilayer

physical adsorption process of DCF. The results showed that DCF was physically adsorbed

onto CTAC, as conﬁrmed by the values of DH minor than 40 kJ/mol. As DG had negative charge,

the adsorption process is exothermic, and the adsorption process of the DCF onto CTAC is spontaneous,

depending on temperature.

ª 2014 The Authors. Production and hosting by Elsevier B.V. on behalf of University of Bahrain. This is an

open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).

المجلة

العنوان: ournal of the Association of Arab Universities for Basic and Applied Sciences
الناشر: Elsevier
بلد الناشر: هولندا
نوع المنشور: Both (Printed and Online)
المجلد: 20
السنة: 2016
الصفحات: 32-38