Citation: JIANG Ke, ZHOU Kang-Gen, PENG Jia-Le. Predominance Diagrams for NH₄⁺-Mg²⁺-PO₄^3--H⁺-H₂O System[J]. Chinese Journal of Inorganic Chemistry, ;2012, 28(12): 2605-2611. shu

Predominance Diagrams for NH₄⁺-Mg²⁺-PO₄^3--H⁺-H₂O System

1.
School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China

Corresponding author: ZHOU Kang-Gen,
Received Date: 15 March 2012
Available Online: 1 July 2012
Fund Project: 国家自然科学基金(No.51174238)资助项目. (No.51174238)

The thermodynamics of NH₄⁺-Mg²⁺-PO₄^3--H⁺-H₂O system was investigated based on the construction of predominance diagrams. The lgC_T,Mg-lgC_T,P and lgC_T,P-pH diagrams were constructed at an arbitrary Mg/P molar ratio with consideration of the ion strength influence(C_T,Mg: total concentration of magnesium; C_T,P: total concentration of phosphorus; C_T,N: total concentration of nitrogen). The thermodynamic stable zones of struvite (MgNH₄PO₄·6H₂O), bobierrite (Mg₃(PO₄)₂·8H₂O), newberyite (MgHPO₄·3H₂O), and magnesium hydroxide (Mg(OH)₂) were determined. The results show that struvite and bobierrite are the dominating phases in a wide range of pH value. Struvite and newberyite coexist with solute phase at low pH value and high total concentration of phosphorus while struvite and magnesium hydroxide are more stable at the alkaline condition. The minimum total concentration of nitrogen appears at pH value of 9.08~9.52 while struvite and bobierrite coexist with the solute phase. The predominance diagrams could be used to predict the precipitation-dissolution equilibrium of struvite for ammonia nitrogen removal and recovery from wastewater.
- ammonia nitrogen;struvite;thermodynamics;predominance diagrams
1. [1]
  [1] Bonmatí A, Flotats X. Waste Manag., 2003,23(3):261-272
2. [2]
  [2] Doyle J D, Parsons S A. Water Res., 2002,36(16):3925-3940
3. [3]
  [3] Jokela J P Y, Kettunen R H, Sormunen K M, et al. Water Res., 2002,36(16):4079-4087
4. [4]
  [4] Uludag-Demirer S, Demirer G N, Chen S. Process Biochem., 2005,40(12):3667-3674
5. [5]
  [5] Li X Z, Zhao Q L, Hao X D. Waste Manag., 1999,19(6):409-415
6. [6]
  [6] Zhang W X, Lau A. J. Chem. Technol. Biotechnol., 2007,82 (6):598-602
7. [7]
  [7] Zhang C, Chen Y G. Environ. Sci. Technol., 2009,43(16): 6164-6170
8. [8]
  [8] Taylor A W, Frazier A W, Gurney E L. Trans. Faraday Soc., 1963,59:1580-1584
9. [9]
  [9] Snoeyink V L, Jenkins D. Water Chemistry. New York: John Wiley and Sons, 1980:306-309
10. [10]
  [10] Stumm W, Morgan J J. Aquatic Chemistry. New York: Wiley-Interscience, 1970:408-409
11. [11]
  [11] Ohlinger K N, Young T M, Schroeder E D. Water Res., 1998,32(12):3607-3614
12. [12]
  [12] Ronteltap M, Maurer M, Gujer W. Water Res., 2007,41(5): 977-984
13. [13]
  [13] Aage H K, Andersen B L, Biota A, et al. J. Radioanal. Nucl. Chem., 1997,223(1/2)213-215
14. [14]
  [14] Mijangos F, Kamel M, Lesmes G, et al. React. Funct. Polym., 2004,60:151-161
15. [15]
  [15] Wang J S, Song Y H, Yuan P, et al. Chemosphere., 2006,65 (7):1182-1187
16. [16]
  [16] WANG Jian-Sen(王建森), SONG Yong-Hui(宋永会), YUAN Peng(袁鹏), et al. Acta Scientiae Circumstantiae (Huanjing Kexue Xuebao), 2006,26(2):208-213
17. [17]
  [17] Ali M I, Schneider P A, Hudson N. J. Indian Inst. Sci., 2005,85(3):141-149
18. [18]
  [18] Miles A, Ellis T G. Water Sci. Technol., 2001,43(11)259-266
19. [19]
  [19] Babic′-Ivancic′ V, Kontrec J, Brecevic′ L. Urol. Res., 2004, 32(5)350-356
20. [20]
  [20] Golubev S V, Savenko A V. Experiment in Geosci., 2001, 10:76
21. [21]
  [21] Dempsy B A. Proceedings of the 52nd Industrial Waste Conference. Purdue Research Foun Ed., Indiana: CRC Press, 1997:369-376
22. [22]
  [22] JIANG Ke(姜科), ZHOU Kang-Gen(周康根), PENG Jia-Le (彭佳乐). J. Cent. South. Univ. T. (Sci. Technol.) (Zhongnan Daxue Xuebao: Ziran Kexue Ban), 2009,40(5):1178-1182.
23. [23]
  [23] Babic-Ivancic V, Kontrec J, Brecevic L, et al. Water Res., 2006,40(18):3447-3455
24. [24]
  [24] Musvoto E V, Wentzel M C, Ekama G. A. Water Res., 2000,34(6):1868-1880
25. [25]
  [25] Warmadewanthi, Liu J C. Sep. Purif. Technol., 2009,64(3): 368-373
26. [26]
  [26] Stratful I, Scrimshaw M D, Lester J N. Water Res., 2001,35 (17):4191-4199
27. [27]
  [27] Diwani G E, Rafie S E, Ibiari N N E, et al. Desalination., 2007,214(1/2/3):200-214
28. [28]
  [28] Gunay A, Karadag D, Tosun I, et al. J. Hazard. Mater., 2008,156(1/2/3):619-623
29. [29]
  [29] Pastor L, Mangin D, Barat R, et al. Bioresource Technol., 2008,99(14):6285-6291
30. [30]
  [30] Booker N A, Priestley A J, Fraser I H. Environ. Technol., 1999,20(7):777-782
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Predominance Diagrams for NH₄⁺-Mg²⁺-PO₄^3--H⁺-H₂O System