ETUDE D'ADSORPTION DE QEULQUE COLORANTS ANIONIQUES

Abstract

The pollution of water and soil by certain industrial or agricultural chemicals is a source of environmental degradation. Currently, pollution is of particular interest internationally. The decontamination of water contaminated with dyes is necessary for the protection of the environment. To this end, many treatment techniques have been developed, but unfortunately these technologies are expensive. It should be noted that there is a simple method for treating industrial wastewater and that is adsorption. This technique is very attractive for its simplicity and low cost. The most widely used adsorbent is activated carbon because it has exceptional adsorption and selectivity properties. This type of adsorbent, being expensive, has prompted scientists to develop new biological materials. Activated carbon prepared from waste from a major source of agricultural waste. In fact, these by-products are nevertheless likely to be of economic interest. To this end, we are interested in the development of an adsorbent based on this waste by chemical and physical activation. This study consists of evaluating activated carbon for the discoloration of water contaminated with Congo Red, Rhodamine B and Remazol blue, by studying the adsorption capacity of activated carbon. After determining the effect of various factors affecting adsorption, such as temperature, pH, concentration and amount of activated carbon, a study of isotherms and adsorption kinetics was made. At the end of this study, it was established that the experimental results of the adsorption of the dye on the activated carbon are well represented by the Langmuir model and the pseudo-second order model.

The pollution of water and soil by certain industrial or agricultural chemicals is a source of environmental degradation. Currently, pollution is of particular interest internationally. The decontamination of water contaminated with dyes is necessary for the protection of the environment. To this end, many treatment techniques have been developed, but unfortunately these technologies are expensive. It should be noted that there is a simple method for treating industrial wastewater and that is adsorption. This technique is very attractive for its simplicity and low cost. The most widely used adsorbent is activated carbon because it has exceptional adsorption and selectivity properties. This type of adsorbent, being expensive, has prompted scientists to develop new biological materials. Activated carbon prepared from waste from a major source of agricultural waste. In fact, these by-products are nevertheless likely to be of economic interest. To this end, we are interested in the development of an adsorbent based on this waste by chemical and physical activation. This study consists of evaluating activated carbon for the discoloration of water contaminated with Congo Red, Rhodamine B and Remazol blue, by studying the adsorption capacity of activated carbon. After determining the effect of various factors affecting adsorption, such as temperature, pH, concentration and amount of activated carbon, a study of isotherms and adsorption kinetics was made. At the end of this study, it was established that the experimental results of the adsorption of the dye on the activated carbon are well represented by the Langmuir model and the pseudo-second order model.

تتكون هذه الدراسة من تقييم الكربون المنشط لتغير لون المياه الملوثة بأحمر الكونغو والرودامين ب والأزرق ريمازول المستخدم في حالته الطبيعية وبدون تنشيط من خلال دراسة قدرته على امتصاص هذه الأصباغ. بعد تحديد تأثير العوامل المختلفة التي تؤثر على الامتزاز ، مثل درجة الحرارة ، ودرجة الحموضة ، والتركيز وكمية الكربون المنشط ، تم إجراء دراسة متساوي الحرارة وحركية الامتزاز. في نهاية هذه الدراسة ، تم التأكد من أن النتائج التجريبية لامتصاص الصبغة على الكربون المنشط يتم تمثيلها بشكل جيد من خلال نموذج لانقمير ونموذج الدرجة الثانية الزائفة.