title: Use of magnesit as a magnesium source for ammonium removal from leachate.
abstract: Using magnesit (MgCO(3)) as a low cost source of magnesium ions in the struvite precipitation for the removal of high ammonium content of leachate was evaluated. Optimum molar concentration and pH conditions were analyzed to minimize the struvite solubility. Since solubility of magnesit in water is low, HCl was used to obtain soluble Mg. Maximum soluble Mg was obtained for the addition of 2 M HCl to the 1 M MgCO(3). Struvite precipitation with magnesit was effective for the removal of ammonium, suspended solid, phosphate and turbidity. Economical evaluation was made comparing the costs of two magnesium sources, MgCl(2) and MgCO(3). The economical analysis has shown that operation cost of struvite precipitation can be reduced about 18% by using MgCO(3) instead of MgCl(2). High salt concentration after struvite precipitation has no inhibitory effect on the anaerobic reactor performance.
authors.affiliation: Balikesir University, Environmental Engineering Department, Cagis, Balikesir, Turkey. ahmetgunay2@gmail.com
authors.forename: Ahmet
authors.initials: A
authors.lastname: Gunay
authors.forename: Dogan
authors.initials: D
authors.lastname: Karadag
authors.forename: Ismail
authors.initials: I
authors.lastname: Tosun
authors.forename: Mustafa
authors.initials: M
authors.lastname: Ozturk
mesh_terms: D011232:Chemical Precipitation; D004785:Environmental Pollutants / Q000302:isolation & purification*; D008274:Magnesium / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000302:isolation & purification*; D012995:Solubility
chemical_list: D004785:Environmental Pollutants; D000644:Quaternary Ammonium Compounds; C005479:magnesium carbonate; D008274:Magnesium