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KMID : 0525720140190020138
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Journal of Chitin and Chitosan
2014 Volume.19 No. 2 p.138 ~ p.142
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Flocculation Effect of Chitosan by Z-potential
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Lee Dong-Yong
Park Sang-Soon
Jung Byung-Ok
Chung Suk-Jin
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Abstract
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By adjusting the reaction conditions of crab shell, chitosan CsA, CsB and CsC were prepared, respectively. The deacetylation degree of prepared CsA, CsB, CsC was 91.3%, 94.6% , 97.1 %, and the viscosity average molecular weight were 9.8×10 5 , 6.9× 10 5 , 4.2×10 5 , respectively. The particle size was increased with the molecular weight of chitosan increasing. and Zeta potential was also decreased with the molecular weight of chitosan increasing. The trend of Zeta potential showed parabola-shaped curve with increasing dose. The optimal dosage of zeta potential was 1.2 mL for 5000 ppm, 1.5 mL for 3000 ppm, and 1.8 mL for 1000 ppm, respectively. The trend of Zeta potential showed mountain-shaped curve with increasing dose. The dosage of large particle size form was 1.2 mL for 5000 ppm, 1.5 mL for 3000 ppm, and 1.8 mL for 1000 ppm respectively. At the same dosage of chitosan, the higher the molecular weight and concentration were excellent. In order to increase the utilization of the waste water treatment, chitosan should be applied by both of molecular weight and dosage for concentration of chitosan.
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KEYWORD
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Chitosan, Flocculation, Zeta potential, particle size, Spectrophotometer
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