Wednesday 26th of July 2017
Iranian scientists produced nanocomposite super absorbent with the capability to increase the efficiency of industrial water and wastewater purification process
TEHRAN (INIC)- Iranian researchers succeeded in the production of nanocomposite super absorbent with the capability to increase the efficiency of industrial water and wastewater purification process.
The use of these absorbent is more economic than the application of other usual methods. In addition, it can be used as an appropriate method to improve the quality of wastewater of chemical and paint industry due to the ease of operation and the lack of sensitivity to toxic materials.
Researchers tried to produce nanocomposite super absorbents on the basis of natural material to purify dye pollutants in various industries with higher efficiency. Nature-based super absorbents, including starch, chitosan, carrageenan and cellulose are appropriate choices in industrial wastewater purification processes due to their biodegradability and biocompatibility. Therefore, a super absorbent based on natural polymer of carrageenan, which is extractable from seaweed, has been produced in this research, and its performance in elimination of cationic dyes of a painting plant wastewater was studied.
The high speed and sorption capacity of the super absorbent is the reason for the presence of nanoparticles in this method. Magnetic nanoparticles give very good ability for the sorption of cationic dyes to super absorbents due to their nanometric scale and high ratio of surface to volume. Results showed that the presence of iron oxide nanoparticles increases the rate of sorption. As the concentration of iron oxide nanoparticles increases in the natural polymer, the higher amount of dye is absorbed.
The presence of magnetic nanoparticles enables the super absorbents to be easily separated after the purification process. Simple design, low cost, quick response, biologic degradability, high sorption capacity and high sorption value are among other advantages of this nanocomposite super absorbent.
Results of the research have been published in Carbohydrate Polymers, vol. 136, 2016, pp. 772-781.