Granulation of oil shale ash with sodium alginate for the removal of phenols from shale oil wastewater

Abstract

Granulated oil shale ash is used for removal of phenols from shale oil waste water

Granulation of oil shale ash with sodium alginate for the removal of phenols from shale oil wastewater

Oil shale ash (OSA) from the circulating fluidized bed (CFB) boiler was granulated and used as a sorbent for the removal of phenols from shale oil wastewater. The method for preparation of the sorbent involved washing of the ash, mixing with clay, gelling the mixture with sodium alginate solu­tion, solidifying the granules in barium chloride solution, drying and calcina­tion of the granules and modifying with a surfactant – hexadecyltrimethyl­ammonium bromide (CTAB). The sorbent was characterized by specific sur­face area (BETN2), X-ray diffraction (XRD) and 29Si Magic Angle Spinning-Nuclear Magnetic Resonance (MAS-NMR) analysis. Batch adsorp­tion experi­ments were conducted to determine the phenol adsorption iso­therm at 20 °C and removal of water-soluble phenols from phenolic shale oil processing wastewater. Removal of phenols from wastewater was found to be 50–65% under given conditions.