Benner
أ .د سعد عزيز حسـوة ( أستاذ )
كلية التربية للبنات - الكيمياء
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Adsorption of 1- (2--Hydroxy - 4--Nitrophenyl azo)-2- Napthol Dye onto the Cement Kiln Dust (CKD)
بحث النوع:
علوم التخصص العام:
Nemah Sahib. Mohammed Hussian اسم الناشر:
Saad A Hassan اسماء المساعدين:
Journal of Global Pharma Technology| 2018; 10(01):88-96 الجهة الناشرة:
Available Online at www.jgpt.co.in  
2018 سنة النشر:

الخلاصة

Abstract The adsorption of 1-(2¯- Hydroxy-4¯-nitrophenyl azo) -2-naphthol dye onto the Cement Kiln Dust (CKD) was studied in the temperature range 298-328K. The sorption process was examined in terms of its equilibria and kinetics. Batch adsorption experiments were conducted to evaluate the percentage removal of 1-(2--Hydroxy -4- - nitrophenyl azo)-2-napthol onto CKD waste at operation conditions of sorbate concentration, pH, contact time, sorbent dose. Time-dependent experiments for the removal efficiency required a shortest contact time, i.e , binding to the CKD was rapid and occurred within 25 min. Adsorption isotherms equations were tested for all of Langmuir, Freundlich, Temkin,3 Dobinin- Radushvich, and Elovich. The equilibrium adsorption data were fitted to Freundlich and Temkin isotherms at 298K. Adsorption followed Intra – partical - diffusion rate kinetics. Thermodynamic parameters ΔG*, ΔH*, ΔS* and Ea were computed, and showed that the adsorption process onto CKD was exothermic and non-spontaneous. Also adsorption studies suggest that physisorption might be the major mode of adsorption and CKD expressed as low affinity for removal of 1-(2¯- Hydroxy-4¯-nitrophenyl azo) - 2-naphthol Dye onto the Cement Kiln Dust that the high percentage removal was found ≈50% at 298K , pH=6.