Removal of Colour from Textile Wastewater by Mango Seed Endocarp Activated Carbon

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Author(s) G.D. Akpen | I.M. Aho | M.H. Mamwan
Pages 756-762
Volume 6
Issue 4
Date April, 2017
Keywords Mango Seed Endocarp, Activated Carbon, Colour, Textile Wastewater
Abstract

Activated Carbons were produced from seed endocarp of a local variety of mango (Magnifera indica) by chemical activation with Zinc Chloride (ZnCl2) before and after carbonization. Various impregnation ratios (1:2, 1:3, 1:4, 1:5 and 1:6) of ZnCl2 to prepared mango seed endocarp by weight were considered in the production of the activated carbons. The produced activated carbons were characterised and subjected to preliminary batch adsorption studies for the removal of colour from textile wastewater to obtain the best impregnation ratio. The best impregnation ratio was further evaluated through batch studies for the purpose of determining optimum conditions for the removal of colour from textile wastewater. Adsorbent dose, initial colour concentration, contact time, stirring rate, pH and temperature were used as variables. The results obtained revealed that mango seed endocarp activated carbon (MSEAC) produced using impregnation ratio of 1:4 was the best among the impregnation ratios investigated. The optimum carbon dose, stirring rate, temperature and pH were respectively 0.8 g, 90 rpm, 30oC and 7. Colour removal increased with decrease in initial colour concentration. 100% removal was achieved at initial colour concentrations below 399 Pt-Co units, hence 399 Pt-Co units was chosen as the optimum initial colour concentration. With respect to time, MSEAC achieved 86.3% removal of colour in 40 min and therefore 40 min was chosen as the optimum contact time. It was recommended that MSEAC can be used to effectively remove colour from textile wastewater at the optimum conditions determined in this research, thus, converting the waste to wealth.

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