Received: FebruAccepted: OctoPublished: November 7, 2019Ĭopyright: © 2019 Fang et al. PLoS ONE 14(11):Įditor: Du Changwen, Institute of Soil Science, CHINA As a result of the structural and phase transformations after mechanochemical activation, phosphorus solubility remarkably increased.Ĭitation: Fang N, Shi Y, Chen Z, Sun X, Zhang L, Yi Y (2019) Effect of mechanochemical activation of natural phosphorite structure as well as phosphorus solubility. With the incorporation of CO 3 2- and OH -, the non-activated carbonate-fluorapatite (type B) was transformed into a mixture of carbonate-fluorapatite, hydroxyapatite, fluorocarbon hydroxyapatite and/or carbonate apatite, respectively during the process of mechanochemical activation. These changes were mainly manifested in considerably reduced particle size, decreased crystallinity and increased structural defects of phosphorite due to substitution of PO 4 3- with CO 3 2- and the incorporation of OH.

Phosphorus solubility in citric acid increased proportionately with the milling time until 30 min (57.51%), but then gradually reached an equilibrium with the maximum (59.03%) in 50 min. In order to investigate the effects of different milling times on the mechanochemically activated phosphorite (lower total phosphorus content) by more efficient milling equipment with enhanced milling speed, phosphorus solubility in citric acid and structural characteristics of natural and mechanochemically activated phosphorite from Yichang, China were studied using scanning electron microscope, infrared spectroscopy and X-ray diffraction.

Mechanochemical treatment of phosphate rock is considered as an effective and ecologically clean way of treating the medium- and low-grade phosphorite which could be used as fertilizer instead of the high-grade phosphorite.

Mestrenova half peak width