title: Ammonium removal from wastewater via struvite pyrolysate recycling with Mg(OH)2 addition.
abstract: Magnesium ammonium phosphate (MAP) pyrolysate recycling technology was investigated with Mg(OH)2-mediated pyrolysis. The results revealed that the removal ratio of ammonium was stable at about 75%, and could be increased to 79% after additional acidolysis. The phosphate concentration in the supernate was low at 2 mg/L. The optimum conditions for ammonia release were a 1:1 molar ratio of Mg(OH)2:NH4(+), a heating temperature of 110 °C and a heating time of 3 h. With continual additions of Mg(OH)2 to release ammonia, magnesium phosphate (Mg3(PO4)2) was suggested as a possible derivative. However, with Mg(OH)2-mediated pyrolysis, the growth and nucleation of MAP was inhibited during MAP pyrolysate recycling.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China E-mail: hqren@nju.edu.cn; Jingdezhen Ceramic Institute, Jingdezhen 333001, Jiangxi, China.
authors.forename: Rongtai
authors.initials: R
authors.lastname: Yu
authors.affiliation: College of Civil Engineering, Tongji University 200092, Shanghai, China.
authors.forename: Subin
authors.initials: S
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China E-mail: hqren@nju.edu.cn.
authors.forename: Hongqiang
authors.initials: H
authors.lastname: Ren
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China E-mail: hqren@nju.edu.cn.
authors.forename: Yanru
authors.initials: Y
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China E-mail: hqren@nju.edu.cn.
authors.forename: Lili
authors.initials: L
authors.lastname: Ding
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China E-mail: hqren@nju.edu.cn.
authors.forename: Jinju
authors.initials: J
authors.lastname: Geng
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China E-mail: hqren@nju.edu.cn.
authors.forename: Ke
authors.initials: K
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China E-mail: hqren@nju.edu.cn.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D064751:Ammonium Compounds / Q000302:isolation & purification*; D006358:Hot Temperature; D007700:Kinetics; D017616:Magnesium Compounds / Q000737:chemistry*; D008276:Magnesium Hydroxide / Q000737:chemistry*; D010316:Particle Size; D010710:Phosphates / Q000737:chemistry*; D059027:Recycling / Q000379:methods*; D000069877:Struvite; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D064751:Ammonium Compounds; D017616:Magnesium Compounds; D008276:Magnesium Hydroxide; D010710:Phosphates; D000069877:Struvite; D062065:Wastewater; D014874:Water Pollutants, Chemical