Élimination du cadmium par adsorption sur une argile locale

Abstract

In our work, we used the local clay of blidet Omar to study the possibility of eliminating cadmium ions from water by adsorption phenomena, while following the effect of change of the factors affecting adsorption capacity. At first, work was carried out to purify the clay and determine its physico-chemical properties. It was found that clay represents 52% of the soil sample. Its properties were found to be 65.5% illite, 21.8% kaolinite, 12.7% quartz and a specific surface area of 113.762m²/g and the cation exchange capacity of the clay sample is equal to 20mEq/ 100ml. The results of treating the solutions with clay showed its effective ability to remove cadmium ions with a yield of 93.72%. Stirring speed, adsorbent mass, and contact time had an effect on adsorption capacity.

استخدمنا في عملنا الطين المحلي لمدينة بلدة عمر لدراسة إمكانية إزالة أيونات الكادميوم من الماء بظاهرة الامتزاز. تم إجراء دراسة للعوامل المؤثرة .بدانا عملنا بتنقية الطين و توصيف خواصه الفيزيائية الكيميائية . اظهرت نتائج ان الطين يمثل 52％ من عينة التربة اما خواصه اظهرت نتائج 65.5％ ايليت 21.8％ كاولنيت 12.7％ كوارتز وسعة تبادل الكاتيوني (20ملي مكافئ/100ملغ) و مساحة السطح المحدد 113,762م2/غ أظهرت نتائج معالجة المحاليل بالطين قدرته الفعالة على ازالة ايونات الكادميوم بمردود 93.72％ كان لسرعة تحريك ووقت تلامس و كتلة الماز تاثير على قدرة الامتزاز.

In our work, we used the local clay of blidet Omar to study the possibility of eliminating cadmium ions from water by adsorption phenomena, while following the effect of change of the factors affecting adsorption capacity. At first, work was carried out to purify the clay and determine its physico-chemical properties. It was found that clay represents 52% of the soil sample. Its properties were found to be 65.5% illite, 21.8% kaolinite, 12.7% quartz and a specific surface area of 113.762m²/g and the cation exchange capacity of the clay sample is equal to 20mEq/ 100ml. The results of treating the solutions with clay showed its effective ability to remove cadmium ions with a yield of 93.72%. Stirring speed, adsorbent mass, and contact time had an effect on adsorption capacity