Effect of mechanochemical activation of natural phosphorite structure as well as phosphorus solubility


Autoři: Nana Fang aff001;  Yuanliang Shi aff002;  Zhenhua Chen aff002;  Xun Sun aff002;  Lei Zhang aff002;  Yanli Yi aff001
Působiště autorů: College of Land and Environment, Shenyang Agricultural University, Shenyang, China aff001;  Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China aff002
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
doi: 10.1371/journal.pone.0224423

Souhrn

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. 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. 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. These changes were mainly manifested in considerably reduced particle size, decreased crystallinity and increased structural defects of phosphorite due to substitution of PO43- with CO32- and the incorporation of OH-. With the incorporation of CO32- 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. As a result of the structural and phase transformations after mechanochemical activation, phosphorus solubility remarkably increased.

Klíčová slova:

Calcite – Carbonates – Citric acid – Crystal structure – Fertilizers – Infrared spectroscopy – Solubility – Diffraction


Zdroje

1. Abouzeid A M. Physical and thermal treatment of phosphate ores-An overview. Int J Miner Process. 2008;85: 59–84.

2. Sukhov BG, Enkhtuyaa D, Amgalan Zh, kul’skaya TI, Novikova LN, Bazarova ZhG, et al. Effect of mechanical activation on structural-chemical properties of phosphorites. Russ J Appl Chem. 1986;80(6): 853–859.

3. Yaneva V, Petkova V, Dombalov I. Structural transformation after mechanical activation of natural phosphorite originating from Syria Chem Sustain Dev. 2005;13: 351–358.

4. Chaikina MV, Aman S. Fracture, grinding, mechanical activation and synthesis processes in solids under mechanical action. Sci Sintering. 2005;37: 93–105.

5. Yaneva V, Petrov O, Petkova V. Structural and spectroscopic studies of mechanochemically activated nanosized apatite from Syria. Mater Res Bull. 2009; 44: 693–699.

6. Chaikina MV. Mechanochemistry of natural and synthetic apatites, In: Avvakumov E.G, editor. Novosibirsk: Publishing House of SB RAS, Branch “GEO”; 2002. pp. 11–15, 105–107, 114–115, 139.

7. Petkova V, Koleva V, Kostova B, Sarov S. Structural and thermal transformations on high energy milling of natural apatite, J. Therm Anal Calorim. 2015;121: 217–225.

8. Tõnsuaadu K, Kaljuvee T, Petkova V, Traksmaa R, Bender V, Kirsimäe K. Impact of mechanical activation on physical and chemical properties of phosphorite concentrates. Int J Min Process. 2011;100: 104–109.

9. Jin L, Sun L, Wang L, Shi Y. Studies on the mechanical activation of Huangmailing phosphorite. Res J Chem Environ. 2013;17(S1): S156–S162.

10. Li Y, Jiang B, Yuan K, Wang Z, Wang S, Zhang L, et al. Soil agricultural chemical routine analytical method. 1st ed. Beijing, China: China Science Publishing and Media Ltd. 1983. Chinese.

11. Criado JM, González M, Real C. Correlation between crystallite size and microstrains in materials subjected to thermal and/or mechanical treatments. J. Mater. Sci. Lett. 1986; 5(4): 467–469.

12. Normative Directive No. 05 of 23 February 2007. Government Gazette. Ministry of Agriculture, Livestock and Supply. 2007. Portuguese.

13. Fernandez-Bertran JF. Mechanochemistry: an overview. Pure Appl Chem. 1999;71(4): 581–586.

14. Winand L, Dallemagne MJ, Duyckaerts G. Hydrogen bonding in apatitic calcium phosphates. Nature. 1961; 190 (4771): 164–165.

15. Wu Q, Zhang S, Liu J. Application of mechanochemistry in preparation of nano-ceramics. Bull Chin Ceram. 2002(2): 33–37. Chinese.

16. Rintoul L, Wentrup-Byrne E, Suzuki S, Grøndahl L. FT-IR spectroscopy of fluoro-substituted hydroxyapatite: strengths and limitations. J. Mater. Sci. Mater. Med. 2007; 18,1701–1709. doi: 10.1007/s10856-007-3052-3 17483886

17. Fleet ME, Liu X. Accommodation of the carbonate ion in fluorapatite synthesized at high pressure. Am Miner. 2008; 93:1460–1469.

18. Nelson DGA, Featherson JDB. Preparation, analysis and characterization of carbonated apatites. Calcif Tissue Int. 1982; 34: S69–S81. 6293677

19. Vignoles M, Bonel G, Holcomb DW, Young RA. Influence of preparation conditions on the composition of type B carbonated hydroxyapatite and on the localization of the carbonate Ions. Calcif Tissue Int. 1988; 43: 33–40. doi: 10.1007/bf02555165 3145118

20. Wei Z, Zhao M, Shan X, Gai G, Yang Y, He Z, etc.Application of mircrocrystalline phosphate rock powders in reducing agricultural non-point source pollution, Chin Powder Sci Technol. 2015(21)6: 91–95. Chinese.


Článek vyšel v časopise

PLOS One


2019 Číslo 11