چكيده به لاتين
Water pollution by various dyes in industrial effluents, which is mostly obtained from dyeing factories, is one of the dangers for the ecosystem, therefore, many studies have been carried out to solve this problem on different materials, which can be seen from the example It mentioned the use of metal oxides and types of clay as well as composites. Nanocomposites based on biopolymers improve not only higher surface absorption and hydrodynamic properties, but also mechanical and thermal properties as well as the chemical stability of the polymer matrix, which improves the reusability of the polymer adsorbent due to the presence of chemical groups such as hydroxyl and carboxyl and amide groups. , increases Recent research shows that they can be used to remove colored organic pollutants and pigments or metal ions from wastewater. Due to biocompatibility and biodegradability properties, olvan hydrogel and xanthan gum along with modified bentonite clay have been used to reduce or eliminate the toxicity of organic dyes. Also, due to the weak strength and low stability of olvan and xanthan gum polymers, the physicochemical properties of these two polymers can be improved by combining them with other materials, in this research natural bentonite is used as a composite or hydrogel. Cobalt oxide used increases the absorption of pollutants. Identification of the above compounds is done with the help of FESEM, FTIR, IR, XRD, etc. devices. According to the data obtained from Freundlich adsorption isotherms, the maximum adsorption amount, time and optimal pH of methylene blue for XGO-Un/HBe-CO nanocomposite are 514.1 mg/g, 90 and 10 minutes, respectively, and the results for Methylene blue and methyl orange dyes in XGO-XG/HBe-CO-CTAB nanocomposite are equal to 742.4 and 567.3 mg/g, respectively, and 60 minutes for methyl orange and methylene blue dyes, respectively, 4 and 6 came.
