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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/12636

Title: Adsorptive removal of iron and manganese from groundwater samples in Ghana by zeolite Y synthesized from bauxite and kaolin
Authors: Kwakye-Awuah, Bright
Sefa-Ntiri, Baah
Von-Kiti, Elizabeth
Nkrumah, Isaac
Williams, Craig
Keywords: bauxite
kaolin
zeolite Y
iron
manganese
removal efficiency
adsorption
Issue Date: 13-Sep-2019
Publisher: MDPI
Abstract: Ground water samples from residential homes in three Regions of Ghana: Central, Greater Accra and Ashanti, were analyzed for iron and manganese contamination. The samples were exposed to characterized zeolite Y by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, Fourier transformed-infrared spectroscopy and thermos gravimetric-differential thermal analysis. Zeolite Y is able to remove 98% of iron and 97% of manganese within an hour. The adsorption of both iron and manganese followed the Freundlich model, suggesting that the ions were transported onto the zeolite Y surface and subsequently diffused into the zeolite Y framework. The kinetic studies showed that pseudo-first order and intra particle and film diffusion models provided the best fit. The adsorption at 0.2 mg L−1 Fe (Q0.2) is calculated to be 0.023 mg g−1 for the Freundlich adsorption model, whilst that of manganese at 0.05 mg L−1 Mn (Q0.05) is evaluated to be 0.015 mg g−1 . The zeolite retains its adsorption properties when retrieved from the first exposure water sample, washed copiously with distilled water and added to fresh water samples. The results suggest that zeolite Y can be used as a potential adsorbent for the removal of iron and manganese from groundwater.
Description: An article published by MDPI and also available at doi:10.3390/w11091912
URI: http://hdl.handle.net/123456789/12636
Appears in Collections:College of Science

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