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Use of industrial by-products and natural media to adsorb nutrients, metals and organic carbon from drinking water

Grace, Maebh A. ; Healy, Mark G. ; Clifford, Eoghan

The Science of the Total Environment, June 15, 2015, Vol.518-519, p.491(7) [Tạp chí có phản biện]

ISSN: 0048-9697

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  • Nhan đề:
    Use of industrial by-products and natural media to adsorb nutrients, metals and organic carbon from drinking water
  • Tác giả: Grace, Maebh A. ; Healy, Mark G. ; Clifford, Eoghan
  • Chủ đề: Zeolites – Usage
  • Là 1 phần của: The Science of the Total Environment, June 15, 2015, Vol.518-519, p.491(7)
  • Mô tả: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.scitotenv.2015.02.075 Byline: Maebh A. Grace, Mark G. Healy, Eoghan Clifford Abstract: Filtration technology is well established in the water sector but is limited by inability to remove targeted contaminants, found in surface and groundwater, which can be damaging to human health. This study optimises the design of filters by examining the efficacy of seven media (fly ash, bottom ash, Bayer residue, granular blast furnace slag (GBS), pyritic fill, granular activated carbon (GAC) and zeolite), to adsorb nitrate, ammonium, total organic carbon (TOC), aluminium, copper (Cu) and phosphorus. Each medium and contaminant was modelled to a Langmuir, Freundlich or Temkin adsorption isotherm, and the impact of pH and temperature (ranging from 10[degrees]C to 29[degrees]C) on their performance was quantified. As retention time within water filters is important in contaminant removal, kinetic studies were carried out to observe the adsorption behaviour over a 24h period. Fly ash and Bayer residue had good TOC, nutrient and Cu adsorption capacity. Granular blast furnace slag and pyritic fill, previously un-investigated in water treatment, showed adsorption potential for all contaminants. In general, pH or temperature adjustment was not necessary to achieve effective adsorption. Kinetic studies showed that at least 60% of adsorption had occurred after 8h for all media. These media show potential for use in a multifunctional water treatment unit for the targeted treatment of specific contaminants. Article History: Received 29 October 2014; Revised 9 February 2015; Accepted 23 February 2015 Article Note: (miscellaneous) Editor: Eddy Y. Zeng
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0048-9697

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