Journal
WATER
Volume 11, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/w11091912
Keywords
bauxite; kaolin; zeolite Y; iron; manganese; removal efficiency; adsorption
Categories
Funding
- Third World Academy of Sciences (TWAS) [16-471 RG/PHYS/AF/AC_G]
- Grand Challenges Canada [RS-0148 -01]
- NERC [NE/R009376/1] Funding Source: UKRI
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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 (Q(0.2)) 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 (Q(0.05)) 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.
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