Formation of magnesium hydrosilicate nanomaterials and its applications for phosphate/ammonium removal
2018
Yu, Rongtai | Liu, Feng | Ren, Hongqiang | Wu, Jichun | Zhang, Xuxiang
Nanomaterials of magnesium hydrosilicate Mg₃Si₂O₅(OH)₄ were developed for phosphate and ammonium recovery from wastewater in virgin, which had the structure of diffuse interlamellar order, and synthesized under hydrothermal conditions at temperatures of 200°C for 36–72 h from mixtures of magnesite and zeolite as mineralizers. The amount of magnesium released has gone up to 48 mg/g by magnesium hydrosilicate, which was increased with the increase in the weight ratio of magnesite:zeolite. When magnesium hydrosilicate was used to adsorb phosphate and ammonium, electrostatic adsorption was not a dominant mechanism, the adsorbing capacity of phosphate was about 19 mg/g, and the simultaneous adsorbing capacity of ammonium was 7.8 mg/g.
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