The Determination andRemoval ofHeavy Metals (Fe, Man, As) From Ground Water Using Iron Oxide Coated Sand (IOCS)
Journal Title: IOSR Journal of Applied Chemistry (IOSR-JAC) - Year 2018, Vol 11, Issue 5
Abstract
This study was undertaken to evaluate the performance of iron oxide coated sand (IOCS) as an adsorbent for the removal of heavy metals (Mn, Fe and As) from groundwater. The main parameters affecting this treatment process were examined namely the adsorbent dose, different adsorbent types and flow rate. Riverbed sand of 0.5-0.85mm was collected, dried and coated with iron oxide. The coated sand was used as an adsorbent for the removal of Iron, Manganese and Arsenic from groundwater in column experiment. The uncoated sand was used as a control. The initial concentrations of Fe, Mn and As of raw groundwater collected from Bayelsa State of Nigeria, were found to be 5.423ppm for Fe, 0.092ppm for Mn and 0.001ppm for Arsenics. The water sample was spiked with 0.715ppm Arsenic to assess the efficiency of the adsorbent in removing heavy metals. The result showed that IOCS is a good adsorbent as compared with the uncoated sand (UCS). For the removal of Arsenic, it was observed that Arsenic was reduced from 0.715ppm to 0.020 ppm for IOCS and 0.073ppm for UCS. The adsorption of Iron (Fe) and Manganese (Mn) were found to increase with decreasing flow rate from 25ml to 5ml per minute respectively. Also, it was observed that as dosage of adsorbent increases, there was an increase in the percentage adsorption of Iron and Manganese from 5g to 25g adsorbent. In summary the coated sand showed better removal efficiency when compared to uncoated sand. Therefore, the column experiment demonstrated that heavy metals (Fe, Mn and As) can be effectively removed from groundwater using locally produced coated sand. The use of coated sand for heavy metal removal is far better than uncoated sand and that the study has shown that the locally produced adsorbent is not only for treatment of drinking water but also waste water and industrial affluent.
Authors and Affiliations
Ubong I. U. , Ngah S. A. , Ipaa R. O
Keywords
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