Journal of Thermal Analysis and Calorimetry

, Volume 110, Issue 3, pp 1217–1223 | Cite as

The use of TG/DSC–FT-IR to assess the effect of Cr sorption on struvite stability and composition

Article
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Abstract

Struvite (MgNH4PO4·6H2O; MAP) can be recovered from animal and human wastes for use as fertilizer. This encourages the sustainable use of phosphorus (P), closing the human P cycle. The toxic metalloid chromium (Cr) is a common component of wastes, and can substitute for P in geochemical and biological systems. Thus, its sorption to, and effect on the stability and composition of recovered MAP requires assessment. MAP precipitated from solutions with 1–100 μM Cr(III) had higher Cr loadings compared to those reacted in the presence of Cr(VI), indicative of higher sorption affinity of the lower oxidation state. Simultaneous thermal analysis of unreacted MAP revealed an endothermic peak at 126 ± 0.5 °C by DSC with a mass loss of 52.9% by TG. Sorption of Cr produced minimal effects on the transition temperature and overall mass loss. The inflection in the TG curve indicated that Cr increased the temperature of maximum decomposition, but also the mass loss at this point. Combining TG results with FT-IR spectra revealed that for initial concentrations of 10–50 μM Cr(III) and 1–5 μM Cr(VI), NH4 + was added, and H2O(s) lost from the MAP structure. The change in composition was consistent with substitution of Cr(III) or Cr(VI) into the MAP structure. The TG/DSC–FT-IR technique confirmed that Cr contamination affects the MAP composition and may accelerate the release of nutrients upon mineral decomposition. This has implications for the use of MAP fertilizers and subsequent cycling of P and contaminants in agricultural systems.

Keywords

Struvite Chromium TG DSC FT-IR 
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Notes

Acknowledgements

Support for this project was jointly funded by The Professional Staff Congress and The City University of New York, PSC-CUNY Award No. 63304. Thanks to Evert Elzinga, Jeffrey Fitts, and Alain Plante whose comments improved this manuscript.

References

  1. 1.
    Elser J, Bennet E. A broken biogeochemical cycle. Nature. 2011;478:29–31.CrossRefGoogle Scholar
  2. 2.
    de-Bashan LE, Bashan Y. Recent advances in removing phosphorus from wastewater and its future use as fertilizer (1997–2003). Water Res. 2004;38:4222–46.CrossRefGoogle Scholar
  3. 3.
    Arakane M, Imai T, Murakami S, Takeuchi M, Ukita M, Sekine M, Higuchi T. Resource recovery from excess sludge by subcritical water combined with magnesium ammonium phosphate process. Water Sci Technol. 2006;54:81–6.Google Scholar
  4. 4.
    Ro KS, Cantrell K, Elliott D, Hunt PG. Catalytic wet gasification of municipal and animal wastes. Ind Eng Chem Res. 2007;46:8839–45.CrossRefGoogle Scholar
  5. 5.
    Borgerding J. Phosphate deposits in digestion systems. J Water Pollut Control Fed. 1972;44:813–9.Google Scholar
  6. 6.
    Suzuki K, Tanaka Y, Osada T, Waki M. Removal of phosphate, magnesium and calcium from swine wastewater through crystallization enhanced by aeration. Water Res. 2002;36:2991–8.CrossRefGoogle Scholar
  7. 7.
    Yi W, Lo KV, Mavinic DS, Liao PH, Koch F. The effects of magnesium and ammonium additions on phosphate recovery from greenhouse wastewater. J Environ Sci Health. 2005;40:363–74.CrossRefGoogle Scholar
  8. 8.
    Escher BI, Wouter P, Suter MJF, Maurer M. Monitoring the removal efficiency of pharmaceuticals and hormones in different treatment processes of source-separated urine with bioassays. Environ Sci Technol. 2006;40:5095–101.CrossRefGoogle Scholar
  9. 9.
    Ronteltap M, Maurer M, Hausherr R, Gujer W. Struvite precipitation from urine—influencing factors on particle size. Water Res. 2010;44:2038–46.CrossRefGoogle Scholar
  10. 10.
    Peterson AA, Vogel F, Lachance RP, Fröling M, Antal MJ, Tester JW. Thermochemical biofuel production in hydrothermal media: a review of sub-and supercritical water technologies. Energy Environ Sci. 2008;1:32–65.CrossRefGoogle Scholar
  11. 11.
    Childers DL, Corman J, Edwards M, Elser JJ. Sustainability challenges of phosphorus and food: solutions from closing the human phosphorus cycle. Bioscience. 2011;61:117–24.CrossRefGoogle Scholar
  12. 12.
    Ronteltap M, Maurer M, Gujer W. The behaviour of pharmaceuticals and heavy metals during struvite precipitation in urine. Water Res. 2007;41:1859–68.CrossRefGoogle Scholar
  13. 13.
    Uysal A, Yilmazel YD, Demirer GN. The determination of fertilizer quality of the formed struvite from effluent of a sewage sludge anaerobic digester. J Hazard Mater. 2010;181:248–54.CrossRefGoogle Scholar
  14. 14.
    Fendorf SE. Surface reactions of chromium in soils and waters. Geoderma. 1995;67:55–71.CrossRefGoogle Scholar
  15. 15.
    Abdelrazig BEI, Sharp JH. Phase changes on heating ammonium magnesium phosphate hydrates. Thermochim Acta. 1988;129:197–215.CrossRefGoogle Scholar
  16. 16.
    Sarkar AK. Hydration/dehydration characteristics of struvite and dittmarite pertaining to magnesium ammonium phosphate cement systems. J Mater Sci. 1991;26:2514–8.CrossRefGoogle Scholar
  17. 17.
    Afzal M, Iqbal M, Ahmad H. Thermal analysis of renal stones. J Therm Anal. 1992;38:1671–82.CrossRefGoogle Scholar
  18. 18.
    Frost RL, Weier ML, Erickson KL. Thermal decomposition of struvite implications for the decomposition of kidney stones. J Therm Anal Calorim. 2004;76:1025–33.CrossRefGoogle Scholar
  19. 19.
    Wakamura M, Kandori K, Ishikawa T. Influence of chromium(III) on the formation of calcium hydroxyapatite. Polyhedron. 1997;16:2047–53.CrossRefGoogle Scholar
  20. 20.
    Zapata B, Balmaseda J, Fregoso-Israel E, Torres-García E. Thermo-kinetics study of orange peel in air. J Therm Anal Calorim. 2009;98:309–15.CrossRefGoogle Scholar
  21. 21.
    Miller TW. Use of TG/FT-IR in material characterization. J Therm Anal Calorim. 2011;106:249–54.CrossRefGoogle Scholar
  22. 22.
    Hu Q, Jin HL, Chen XA, Wang S. Thermal and FT-IR spectral studies of N,N′-diphenylguanidine. J Therm Anal Calorim. 2011. doi: 10.1007/s10973-011-1948-0.
  23. 23.
    Jingyan S, Zhiyong W, Yuwen L, Cunxin W. Investigation of thermal behavior of enoxacin and its hydrochloride. J Therm Anal Calorim. 2011. doi: 10.1007/s10973-011-1817-x.
  24. 24.
    Parkhurst DL, Appelo CAJ. User’s guide to PHREEQC (version 2)—a computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations. U.S. Geological Survey Water-Resources Investigations Report 99-4259; 1999.Google Scholar
  25. 25.
    Ohlinger KN, Young TM, Schroeder ED. Predicting struvite formation in digestion. Water Res. 1998;32:3607–14.CrossRefGoogle Scholar
  26. 26.
    Bouropoulos NC. Koutsoukos PG spontaneous precipitation of struvite from aqueous solutions. J Cryst Growth. 2000;213:381–8.CrossRefGoogle Scholar
  27. 27.
    Ferraris G, Fuess H, Joswig W. Neutron diffraction study of MgNH4PO4.6H2O (struvite) and survey of water molecules donating short hydrogen bonds. Acta Crystallogr. 1986;B42:253–8.Google Scholar
  28. 28.
    Shashkova IL, Rat’ko AI, Kitikova NV. Removal of heavy metal ions from aqueous solutions by alkaline-earth metal phosphates. Colloids Surf A. 1999;160:207–15.CrossRefGoogle Scholar
  29. 29.
    Le Corre KS, Valsami-Jones E, Hobbs P, Jefferson B, Parsons SA. Agglomeration of struvite crystals. Water Res. 2007;41:419–25.CrossRefGoogle Scholar
  30. 30.
    González-Ponce R, García-López-de-Sá ME. Evaluation of struvite as a fertilizer: a comparison with traditional P sources. Agrochimica. 2007;51:301–8.Google Scholar
  31. 31.
    González-Ponce R, López-de-Sá EG, Plaza C. Lettuce response to phosphorus fertilization with struvite recovered from municipal wastewater. HortScience. 2009;44:426–30.Google Scholar
  32. 32.
    Rahman Md M, Liu YH, Kwag J-H, Ra CS. Recovery of struvite from animal wastewater and its nutrient leaching loss in soil. J Hazard Mater. 2011;186:2026–30.CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2011

Authors and Affiliations

  1. 1.School of Earth and Environmental SciencesQueens College, CUNYFlushingUSA

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