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Register a new userChoose the optimum conditions for the simultaneous adsorption of the lead and cadmium ions orange pell as a adsorption surface
اختيار الشروط المثلى للامتزاز المتزامن لأيونات الرصاص و الكادميوم من المحاليل المائية باستخدام قشور البرتقال كسطح ماز
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Tishreen University ورقة بحثية
Publication date
2017
fields
Chemistry
and research's language is
العربية
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Shamra Editor
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تناول البحث إمكانية إزالة أيونات المعادن الثقيلة (Cd ,Pb) من المحاليل المائية باستخدام طريقة الامتزاز على قشور الحمضيات (البرتقال) التي تعدّ من المخلفات الصلبة و المتوفرة بكثرة خاصة في الساحل السوري فضلا عن سهولة استخدامها بكلفة منخفضة، حيث تمّ العمل على تحديد شروط الامتزاز الأمثل و المتزامن لكل من أيونات الرصاص و الكادميوم على سطح قشور البرتقال (الجافة,الطرية). حددت تراكيز الأيونات المدروسة باستخدام الطريقة الفولط أمبيرومترية (DPASV) ذات الحساسية و الدقة العاليتين. بينّت النتائج أنّ شروط الامتزاز الأمثل كانت عند قرينة الحموضة pH = 5, و زمن التوازن 60 min , و بتركيز ابتدائي 200 ppm) = (50- C0 و لوحظ بتطبيق نماذج الامتزاز لكل من لانغموير و فروندليتش بأنّ أنموذج فروندليتش هو الأنسب للتعبير عن عملية الامتزاز الحاصلة لأيونات Pb على سطح قشور البرتقال الطرية و الجافة, و عملية الامتزاز الحاصلة لأيونات Cd على سطح القشور الطرية بينما أنموذج لانغموير هو الأنسب لوصف امتزاز أيونات Cd على سطح القشور الجافة. طبقت الطريقة بشروطها المختارة على عينات واقعية من مياه صرف معالجة و صناعية فأبدت تجاوباً مميزاً كطريقة تنقية للأوساط المائية.
The study investigated the possibility of removing heavy metal ions (Cd, Pb) from aqueous solutions using adsorption method on the citrus peel (orange), which is a solid waste available in abundance especially in the Syrian coast as well as easy to use at low cost. The optimal conditions for the simultaneous adsorption of the ions (Cd 2+, Pb 2+) on the surface of orange peel (dry, soft) were determined.The concetration of ions was determined using (DPASV) method Which is characterized by Sensitivity and high accurawcy. The results showed that the optimum adsorption conditions were at pH = 5 , equleibrium time = 60 min, and the initial concentration is ( C0 = 50-200) ppm,The application of the Langmuir and Frienlish models showed that Frienlish model is best fited for expressing the adsorption of Pb ions on the surface of dry and soft orange peel and for expressing the adsorption of Cd ions on the surface of soft orange peel , Langmuir model is best fited for expressing the adsorption of Cd ions on the surface of dry orange peel. The method applied its selected terms to realistic samples of processed and industrial waste water, which showed a unique response as a purification method for the water media.
References used
MARTIN,SABINE,GRISWOLD,WENDY. Human Health Effects of Heavy Metals, Center for Hazardous Substance Research,(15),USA.(2009)
P.KAEWSARN,Q.Y.U, Cadmium(II) removal from aqueous solutions by premodified biomass of marine alga Padina sp, Environ. Pollut,112, (2001), 209-213
G. YAN, T. VIRARAGHAVAN.Heavy metal removal in a biosorption column by immobilized M. rouxii biomass, Bioresour. Technol, 78, (2001) 243-249
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