Essay Example on Major sources of water pollution are heavy Metals









Major sources of water pollution are heavy metals drugs pesticides and dyes etc Water from textile industries contain large amount of dyes Mixing of this industrial water with fresh water reservoir without any treatment poses a serious threat to aquatic life and also for humans Therefore treatment of this wastewater is essential Biosorption is one of the efficient and inexpensive method for the removal of dyes In this research bio waste material used as adsorbent and various biocomposites will be prepared to enhance the biosorption potential Various parameters such as temperature pH biosorbent dose and time will be optimized for the dye adsorption For characterization of biocomposites SEM and FTIR will be used Different kinetic and equilibrium models will be used for this biosorption study Obtained data will be statistically analysed using regression analysis 

Water plays an important role for maintenance of animals and plants life Water resources reduce due to increasing pollution in freshwater ecosystems Water becomes polluted due to pollutants which are released from different industries like textile plastics paper organic dyes reactive dyes synthetic dyes persistent organic pollutants and etc A minute quantity of dye gives color in water A small amount of dye when released in water causes severe diseases in animals humans and aqueous life Ibrahim et al 2012 Dyes are uncontrollable molecules organic in nature more stable in the presence of light oxidizing agents heat and are challenging to aerobic digestion Due to the absorbing and reflecting nature of dyes in wastewater it prevents the entering of sunlight to aquatic life Due to this harmful behavior of dyes it is necessary to remove dyes from wastewater Jayganesh et al 2017 Dyes are acidic and basic in nature but crystal violet is a basic dye in nature due to the presence of triarylmethane group Methyl violet is IUPAC name of crystal violet Tris 4 dimethylamino phenyl methylium chloride is a chemical name of crystal violet its molecular formula is written as C25N3H30Cl its molecular weight is 407 98 They show maximum absorption at 570 594 nm due to this it is used as a pH indicator Mittal et al 2010 Crystal violet used as a dye in different industries like textile and in paper industries Various products such as fertilizers anti freezes detergents and leather jackets shows color due to CV dye Rashmi et al 2015 In humans CV dye also used as an external skin disinfectant CV dye used to give a purple color in cotton silk and in paints Mittal et al 2010 CV dye causes harmful effects on humans and animals like eye irritation etc Due to cationic nature of products its absorbance through the skin and cause skin irritation and digestive tract irritation In severe cases it causes respiratory failure of kidney and blindness 

Due to all of the above discussed harmful effects of CV dye different research approaches are used to eliminate this dye from wastewater Mittal et al 2010 In conventional treatment methods different technologies are used for the degradation of dyes from wastewater like biological treatment electrocoagulation reverse osmosis oxidation and adsorption Chinniagounder et al 2011 All the above discussed methods are not completely successful it contains some limitations in terms of design cost and operation The adsorption method for removal of dyes from wastewater is superior to other methods in terms of cost design operation and in sensitivity to toxic sludge formation Jayganesh et al 2017 Biosorption process occurs by using those materials which are obtained through natural origin including many microorganisms Biosorbents are used to treat a huge amount of contaminated water which contains very minute concentration of these dyes and POPs Candal et al 2012 Adsorption is a process used for the removal of pollutant substances and follow same mechanism like organic and inorganic substances

The deposition of adsorbate on the surface of adsorbent is known as a adsorption Rashed 2013 Many adsorbents like domestic agricultural or plant biomass waste which are easily available and low in cost have been used for the degradation of crystal violet dye from contaminated water such as grapefruit peel jackfruit leaf powder rice husk and ginger waste Kulkarni et al 2017 Several other adsorbents including charcoal orange peel oil cakes date palm neem seed and olive shell etc are also used for degradation of crystal violet Rashed 2013 Sawdust are small sized and wood waste which is a powdery in nature obtained by sawing of wood Hashem et al 2006 Sawdust is considered as a most attractive material which is used for degradation of pollutants in contaminated water Timber industry produces lignocellulosic material which is a byproduct of this industry 

The material composed of lignin cellulose and hemicelluloses The lignocellulosic matrix of sawdust creates many functional groups due to its complex chemical structure that play a major role for binding dyes through different methods Different studies exhibited that by subjecting the sawdust to mild acid hydrolysis increases the adsorption capacity of the treated material Djilali et al 2016 Current research work is based on the saw dust based composites for removal of organic pollutants from aqueous media So this research will be based on utilization of sawdust biomass for the formation of biocomposites for organic pollutant wastewater treatment

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