No microscopic analysis is possible without dyes, stains or indicators. Indeed, dyes and stains are extraordinarily critical in biology, biochemistry, molecular biology and microbiological research, because they are frequently used to dye or dye certain cellular components, proteins or DNA/RNA to visualize them. In biochemistry and molecular biology, dyes and stains are used to highlight biological tissues and to quantify or qualify the presence of certain chemicals when attached to substrates. In microbiology, dyes and stains are used to make microorganisms visible or differentiate them due to distinct colorings properties. On the other hand, indicators are often used to measure the pH of the samples. They are added to microbiological culture media to detect the metabolic properties of microorganisms. Despite what has just been said, half a dozen of these dyes (E102, E104, and E129), combined with various preservatives, and are thought to be responsible for hyperactivity in some children. Synthetic dyes are also suspected of causing respiratory problems and allergies. Adsorption remains the most recommended classic technique because of its simplicity, efficiency, ease of implementation and low cost. In this context, our study focused on the removal of three dyes: carmine, phenolphthalein, and eosin b on the surface of two adsorbents: activated carbon, natural clay. We used various physico-chemical techniques to determine the crystalline structure of the DRX device, for this to make a clear idea of the chemical binding by the FTIR analysis and finally to know the maximum absorbance λmax of the dyes it is by the UV-Visible analysis method. In addition, we describe a simplified explanation of adsorption kinetics. The results obtained help us to compare the efficiency of active carbon and natural clay for color removal, in addition to the possibility of describing adsorption by the two models of adsorption isotherms Freundlich and Langmuir.
Citation
Abderezak GUEMACHE ,
Ahmed BOUCHELAGHEM ,
Mahmoud DRIF ,
Fares KAHOUL ,
Louanes HAMZIOUI ,
,(2023-03-14), Crystallographic structure‑ and texture‑dependent fracture behavior of polycrystalline BFN–PZT ceramics,The 1st INTERNATIONAL SEMINAR ON CHEMICAL PROCESS & ENVIRONMENT,Biskra