Abstract

PAJARO, Yina  and  DIAZ, Fredyc. REMOVAL OF HEXAVALENT CHROMIUM FROM CONTAMINATED WATER USING CHITOSAN OBTAINED FROM SHRIMP EXOSKELETON. Rev.Colomb.Quim. [online]. 2012, vol.41, n.2, pp.283-298. ISSN 0120-2804.

The exoskeleton of shrimp discarded by the industry, can be used for the production of chitin and chitosan with the use of very low cost commercial reagents. Chitosan is a biopolymer that has many uses, including heavy metals removal from wastewater. In this study, chitosan was used to remove hexavalent chromium from wastewater samples from the galvanizing process (chrome) of an industry in the city of Cartagena. The chromium removal was performed by a batch process at an optimum pH found in this study of 2.0 and a temperature of 26 °C. The adsorption kinetics was studied by using the Langmuir isotherm, being the maximum adsorption capacity (Qmax.) of 200 mg/g. The removal of hexavalent chromium from wastewater samples was 99.98 %.

Keywords : chitin; chitosan; Langmuir isotherm; hexavalent chromium.

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