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Adsorptive Removal of Iron and Manganese from Groundwater Samples in Ghana by Zeolite Y Synthesized from Bauxite and Kaolin

Williams, Craig
; 
Kwakye-Awuah, Bright
; 
Sefa-Ntiri, Baah
; 
Von-Kiti, Elizabeth
; 
Nkrumah, Isaac
Authors
Williams, Craig
 Kwakye-Awuah, Bright
 Sefa-Ntiri, Baah
 Von-Kiti, Elizabeth
 Nkrumah, Isaac
Editors
Other contributors
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Epub Date
Issue Date
2019-09-13
Submitted date
Subjects
bauxite
 kaolin
 zeolite Y
 iron
 manganese
 removal efficiency
 adsorption
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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 follows the Freundlich model, whilst the kinetic studies show that pseudo-first order and intra particle and film diffusion models provided the best fit, suggesting the transport of the ions onto the zeolite Y surface and the subsequent diffusion into the zeolite Y framework. The adsorption at 0.2 mg Lāˆ’1 Fe (š‘„0.2) is calculated to be 0.023 mg gāˆ’1 for the Freundlich adsorption model, whilst that of manganese at 0.05 mg Lāˆ’1 Mn (š‘„0.05) is evaluated to be 0.015 mg gāˆ’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.
Citation
Kwakye-Awuah, B., Sefa-Ntiri, B., Von-Kiti, E. and Williams, C. (2019) Adsorptive Removal of Iron and Manganese from Groundwater Samples in Ghana by Zeolite Y Synthesized from Bauxite and Kaolin, Water, 11(9), 1912; https://doi.org/10.3390/w11091912
Publisher
MDPI
Journal
Water
Research Unit
URI
http://hdl.handle.net/2436/622539
DOI
10.3390/w11091912
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PubMed Central ID
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https://www.mdpi.com/2073-4441/11/9/1912/htm
Type
Journal article
Language
en
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ISSN
2073-4441
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Sponsors
Third World Academy of Sciences (TWAS) (Grant # 16-471 RG/PHYS/AF/AC_G), Grand Challenges Canada (Grant # RS-0148 -01) and National Environment Research Council (NERC) (Grant # NE/R009376/1). The authors are grateful to Royal Society, UK and Grand Challenges Canada for their financial support.
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