Adsorption of direct scarlet 4BS from simulated textile wastewater using chitosan from black tiger shrimp (Penaeus monodon) shells as adsorbent.

Date

2009

Degree

Bachelor of Science in Chemistry

Abstract

Chitosan was produced from Black Tiger shrimp shells. The shells were oven dried , powdered and screened to mesh 30 prior to chemical treatments. The shells were subjected to demineralization, deproteinization, and deactylation. A yield of 14.44% was achieved. The extracted chitosan was white and off-white crystalline powder, soft and odorless. Analysis of the chitosan showed that it has 7.67% moisture content, 0.25% ash content, and 1.33g/10mI bulk density which were comparable to industrial grade chitosan. The produced chitosan was used for the adsorption of Direct Scarlet 4BS. The wavelength of maximum adsorption of the dye was at 500nm corresponding to an absorbance of 0.615. The Langmuir and Freundlich isotherm were established to evaluate the adsorption of the dye in chitosan. Results show that adsorption data is best described by Freundlich isotherm. The study showed that the removal of the dye decreases as the pH increases having 80.04%, 77.47%, and 29.28% dye removal at pH 3.4, 6.1, and 10.1 respectively. This can be explained by the presence of negatively charged ions competing on the anion groups of the dye for adsorptions sites. On the other hand, dye uptake increases as contact time increases. The contact time required to establish equilibrium was at 7200 minutes. Generally, the chitosan was seen to be a feasible adsorbent of Direct Scarlet 4BS. .

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2009 E62 M33

Document Type

Thesis

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