Removal of Malachite Green Dyestuff from Domestic Sewage and Industrial Wastewater by Polymeric-Inorganic Hybrid Materials

A worldwide thriving and wealthy economy has simultaneously resulted in severe environmental pollution. Plenty of domestic sewage and industrial wastewater isdischarged into various surface water bodies e.g. lakes, rivers and seas, especially in developing countries. The organiccontaminations are rather serious in some natural waterbodies, such that the water quality/function gets worse and worse. The conventional treatment techniques, likeflocculation, adsorption, ion exchange, membrane filtration, oxidation, electrolysis, and so on, have been appliedextensively to the treatment of wastewater. Malachite Green is one of the dangerous pollutants which are used as colour in textile industries and must be removed from industrialwastewater. Alginates are natural polysaccharides and renowned supports for these applicants which are extracted from brown seaweeds. Monovalent salts of alginate like sodium alginate (SA) are soluble in water, while divalent Ca2+, Sr2+ and Ba2+ and multivalent cations due to the formation ofcoordination structures with carboxylate and hydroxyl groups of alginates are insoluble in water. Absorption property ofmultivalent cations by means of alginates is used for separation of heavy metals and contaminations from wastewater