Role of Polymeric Hydrogels In the Enviornment

                                                                           Abstract

Hydrogels are a class of polymer materials that can absorb large amounts of water without dissolving. These are network of crosslinked polymers which have lots of characteristic properties. Hydrogels have the ability to sense changes of P^H, temperature or the concentration. So they are environmentally sensitive hydrogels. Adsorption capacity is one of the major advantages of these polymers. HDODA-crosslinked acrylic acid-N-vinyl pyrrolidone co polymeric hydrogel is an efficient hydrogel for the removal of hazardous dye Malachite Green from water. Malachite Green also called aniline green, basic green 4, diamond green B or Victoria green B is a toxic chemical which can lead to many diseases including carcinogenicity. The chemical was classified a Class II Health Hazard because it is found to be toxic to human cells and might cause liver tumor formation. Malachite Green is commonly known in a form called chromatic form in which it is a green dye. Removal of hazardous dye Malachite Green from water is carried out by using HDODA-crosslinked acrylic acid-N-vinyl pyrrolidone due to their high adsorption capacities. Varying conditions to obtain the dye binding, effect of concentration, temperature, amount of polymer etc are found out. Synthesis of polymer, characterization, dye binding and various conditions are detailed in this paper. Characterization of the dye, polymeric hydrogel and dye bound polymeric hydrogel was carried out by IR, UV and SEM.