5. CONCLUSIONS
Dry waste prawn shell converted to chitin and chitosan by using 3.5% of NaOH and 1N HCl with the temperature range from 20 oC-120 oC in the process of deprotinized, demineralized , decolourized and deacytilated .CMC was synthesized by carboxymethylation, as some of the –OH group of chitosan were substituted by –CH2COOH groups.
Carboxymethyl chitosan was used as an adsorbent for the removal of copper from the wastewater. The removal efficiencies of copper were affected by different parameters such as pH, adsorbent dosage, temperature, contact time, initial metal ion concentration, anion and cation.
The optimum pH and the optimum temperature of solution for copper removal were found to be 6 and 20 0C respectively. When dosage
Dry waste prawn shell converted to chitin and chitosan by using 3.5% of NaOH and 1N HCl with the temperature range from 20 oC-120 oC in the process of deprotinized, demineralized , decolourized and deacytilated .CMC was synthesized by carboxymethylation, as some of the –OH group of chitosan were substituted by –CH2COOH groups.
Carboxymethyl chitosan was used as an adsorbent for the removal of copper from the wastewater. The removal efficiencies of copper were affected by different parameters such as pH, adsorbent dosage, temperature, contact time, initial metal ion concentration, anion and cation.
The optimum pH and the optimum temperature of solution for copper removal were found to be 6 and 20 0C respectively. When dosage