Abstract
AbstractBiodegradable “green” and safe substitutes to minimize environmental and health risks are drawing extensive attention for research interest. This research aims to create a water‐soluble cationic starch‐grafted biodegradable polymer that can be used as a flocculant. As polymers are strong molecules that carry charges, they are effective flocculants. Saturated polymer chains do not change the pH value on adding to wastewater. The reactive groups of the starch, i.e., hydroxyls, form a complex with cations present in the reagent. According to the proposed strategy outlined in the research, the mechanism of free radical graft copolymerization of ethyl monomers onto starch should proceed as expected. In presence of molecular nitrogen, H+ may be replaced by reactive group R, i.e., CH2CH2N (Et3) (triethylamine) in a highly alkaline medium. During the work, it was observed that starch‐based flocculant exhibits a high degree of cationic charge. Developed cationic flocculant performs well in a liquid dispersion form, is fast‐acting and effective, and is suitable for treating industrial wastewater. It combines low sludge formation with cost‐effectiveness. The paper will discuss important practical considerations to increase the %N2 by changing the reaction parameters of the polymer produced and its effect on flocculation efficiency.
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