Extraction of Some Calcium and Magnesium Salts From Waste Water of Regeneration Process in Demineralization Plant

Abstract

The produced water from cation exchanger regeneration processes has been enriched by calcium and magnesium salts (very hard water). In this research, extraction of calcium and magnesium salts in the form of magnesium and calcium hydroxide (Lime) will carry out during adjusting pH of cation regeneration wastewater by adding anion regeneration wastewater. The extracted salts were dried and characterized by using chemical analysis, IR spectrum and X-ray analysis. Results indicated that an increase in the addition of anionic wastewater to cationic wastewater up to 60% caused a decrease in total hardness, magnesium hardness and calcium hardness concentrations in cationic wastewater up to 80%. However, the maximum percentage recovery of calcium salts obtained at pH values between10-11, while those of magnesium salts were between11-12.

Using of Extracted Magnesium Oxide From Cationic Resin Regeneration Wastewater to Be Used in the Treatment of Heavy Fuel Oil in the Steam Boilers in Power Plants

“… X-ray analysis was determined by using energy dispersive X-ray model The magnesium salts were fully precipitated at pH of 11.5 and more. The extracted magnesium salt was put in a muffle furnace at 650 0 C for 4 hours to convert magnesium carbonate and hydroxide to magnesium oxide (Khalil et al, 2014).…”

“…Salts have been recovered from salty lakes and sea water (Kilic, 2005, Drioli et al , 2004and Himawan, 2006, the maximum percentage recovery of calcium salts obtained at pH value between10-11, while magnesium salts was between11-12. ( Khalil et al , 2014), Magnesium oxide has numerous applications in both agricultural and industrial fields. In industry magnesium oxide is useful as a boiler feed additive and is one of the primary reactant materials in many chemical process reactions, such as acid neutralization, cation replacement, and hydration, for many of these uses and application it would be advantageous to provide a high concentration aqueous magnesium oxide suspension to facilitate handling and ease of incorporation into a resultant product or reaction, or for use as a direct application for boiler feed additives, The insoluble magnesium oxide, frequently settles and/or causes formation of an immobile gel-like mixture, particularly at concentrations above about six percent.…”