Preparation of water soluble Cationic biodegradable starch as a flocculant

Abstract

This work dealt with the synthesis of water-soluble cationic biodegradable starch as a flocculant. The reactive groups of the starch, i.e. hydroxyls, form a complex with cations present in reagent. The complex may dissociate, giving rise to free radical sites onto the polysaccharide backbone. The mechanism of free radical graft copolymerisation of Ethyl monomers onto starch is expected to proceed according to the proposed scheme discussed in the paper. In presence of molecular Nitrogen, H+ may be replaced by Reactive group R, i.e. CH2 CH2 N (Et3) in highly Alkaline medium. The work has been carried out under dissertation work of M. E. Programme at Ahmedabad Textile Industries Research Association (ATIRA), Ahmedabad. During our work we have found that Developed cationic flocculant is considered to be a medium molecular weight, starch-based flocculant that exhibits a high degree of cationic charge. Developed Cationic flocculant is good in a liquid dispersion form. Also, is a fast acting and effective flocculant can be used in industrial wastewater treatment. It combines the low sludge production characteristics of organic flocculants with the economy of an inorganic. The paper will discuss some important practical considerations to increase the %N2 by changing the reaction parameters of the polymer produced.