[논문]스트루바이트(MgNH4PO4·6H2O)의 결정화 및 구조 안정성에 미치는 온도 효과

이선용; 장봉수; 강수아; 이영재

doi:10.22807/kjmp.2020.33.1.29

스트루바이트(MgNH4PO4·6H2O)의 결정화 및 구조 안정성에 미치는 온도 효과
Effects of Temperature on The Crystallization and Structural Stability of Struvite (MgNH4PO4·6H2O) 원문보기

광물과 암석 = Korean journal of mineralogy and petrology, v.33 no.1, 2020년, pp.29 - 39

이선용 (고려대학교 지구환경과학과) , 장봉수 (고려대학교 지구환경과학과) , 강수아 (고려대학교 지구환경과학과) , 이영재 (고려대학교 지구환경과학과)

초록
AI-Helper

다양한 온도에서 스트루바이트(struvite, MgNH₄PO₄·6H₂O)들이 합성 및 건조되었다. 스트루바이트의 결정화와 그 구조적 특성은 합성 온도와 건조 온도 모두에게 큰 영향을 받았다. 스트루바이트는 합성 온도 ≤30℃에서 순조롭게 형성되었으며, 결정도는 합성 온도와 역의 관계를 보였다. 또한, 스트루바이트 결정도는 건조 온도가 45℃에서 60℃로 증가함에 따라 감소되었으며, 이는 열분해로 인해 발생한 구조적 물 분자와 암모늄 이온의 손실로 촉진되었다. 그러나 낮은 합성 온도에서 합성된 스트루바이트 일수록 높은 결정도를 가지며, 열분해에 의한 비정질화가 억제되었다. 본 결과는 저온의 열역학적으로 안정한 조건에서 형성된 스트루바이트는 높은 결정성을 보이며, 이에 따른 구조 안정성과 열저항성을 갖음을 입증한다.

Abstract ▼ AI-Helper

A series of struvite (MgNH4PO4·6H2O) was synthesized and dried at various temperatures (15-60℃). Crystallization of struvite and its structural properties were significantly influenced by synthetic and drying temperature. Struvite was favorably formed at synthetic temperatures ≤30℃ with an inverse relationship between the crystallinity and synthetic temperature. The crystallinity of struvite was also significantly reduced by an increase in drying temperature from 45℃ to 60℃ due to the loss of structural water molecules and ammonium ions by the facilitated thermal decomposition. However, struvite formed at lower synthetic temperature showed higher crystallinity, and its amorphization by thermal decomposition was inhibited. These results demonstrate that struvite formed at low temperature with an stable condition thermodynamically through favorable crystallization shows high crystallinity and stability with respect to the structural and thermal resistance.

주제어

표/그림 (10)

그림 Fig. 1. XRD patterns of struvite formed at T_(S) of 15-30°C as a function o f drying t ime.
그림 Fig. 2. XRD patterns for the struvite formed at various temperatures T_(S) of 15-30°C and T_(D) of 45 and 60°C.
표 Table 1. Summary of XRD results including main peaks with intensity and full width at half maximum (FWHM) for the struvite formed at various T_(S) of 15–30°C and T_(D) of 45 and 60°C^†.
그림 Fig. 3. TGA curves for the struvite formed at various temperatures T_(S) of 15-30°C and T_(D) of 45 and 60°C.
그림 Fig. 4. XRD patterns for disordered Mg-minerals formed at various T_(S) of 35-60°C and T_(D) of 45 and 60°C.
그림 Fig. 5. TGA curves for disordered Mg-minerals formed at various T_(S) of 35-60°C and T_(D) of 45 and 60°C.
그림 Fig. 6. (a) Characteristics of bands for the struvite formed at T_(S) of 25°C and T_(D) of 45°C, ( b) FTIR spectra for all samples formed at T_(S) of 15-60°C and T_(D) of 45°C.
표 Table 2. Observed infrared frequencies (cm^-1), assignments and characteristics for the bands of samples formed at various T_(S) of 15-35°C and T_(D) of 45 and 60°C.
그림 Fig. 7. FT-IR spectra of struvite formed at various T_(S) of 15-30°C and T_(D) of 45 and 60°C and disordered Mg-minerals formed at T_(S) of 35°C.
그림 Fig. 8. SEM images of struvite and disordered Mg-minerals with various formation conditions.

AI 본문요약
AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

가설 설정

b) FTIR spectra for all samples formed at T(S) of 15– 60℃ and T(D) of 45℃.

제안 방법

Subsequently,precipitates were dried at two different temperatures(T_(D)) of 45 and 60℃ for 1–24 hrs to evaluate their thermal stability of struvite formed at each synthetic condition. Additional characterization was performed on the 10 hrs dry samples in which the structural properties were distinctly divided into two groups, amorphous and crystalline struvite.
All samples were characterized by a combination of X-ray diffraction (XRD, Rigaku SmartLab), thermogravimetric analysis (TGA, TA Instrument Q600),attenuated total reflectance fourier transform-infrared spectroscopy (ATR FT-IR, Agilent Cary 630 FT-IR) and field emission-scanning electron microscope(FE-SEM, FEI Quanta 250 FEG). Briefly, XRD was conducted using Cu-Kα at 45 kV and 200 mA in 2theta steps of 0.

대상 데이터

All samples were synthesized by wet precipitation with reagent grade materials (Sigma Aldrich). Briefly, 10.

성능/효과

Synthesized struvite could be easily destroyed by thermal decomposition and transformed into amorphous or disordered Mg-minerals in the narrow range of temperature between 45 to 60℃, but depending on itscrystallinity and drying temperature including time. In conclusion, struvite crystallization and its structural properties such as crystallinity, chemical composition, morphology, and thermal stability are very sensitive to both synthetic and drying temperature,indicating that temperature plays a crucial role in controlling physicochemical properties of struvite with respect to the crystallization of struvite. It,therefore, is believed that our results provide useful information on the research of desired material synthesis and formation (e.

참고문헌 (31)

Aage, H., Andersen, B.L., Blom, A. and Jensen, I. (1997) The solubility of struvite. Journal of Radioanalytical and Nuclear Chemistry 223(1-2), 213-215.

상세보기
Abbona, F. and Boistelle, R. (1979) Growth morphology and crystal habit of struvite crystals (MgNH4PO4.6H2O). Journal of Crystal Growth 46(3), 339-354.

상세보기
Abbona, F. and Franchiniangela, M. (1990) Crystallization of calcium and magnesium phosphates from solutions of low concentration. Journal of Crystal Growth 104(3), 661-671.

상세보기
Babic-Ivancic, V., Kontrec, J. and Brecevic, L. (2004) Formation and transformation of struvite and newberyite in aqueous solutions under conditions similar to physiological. Urological Research 32(5), 350-356.

상세보기
Babic-Ivancic, V., Kontrec, J., Kralj, D. and Brecevic, L. (2002) Precipitation diagrams of struvite and dissolution kinetics of different struvite morphologies. Croatica Chemica Acta 75(1), 89-106.

상세보기
Bhuiyan, M.I.H., Mavinic, D.S. and Beckie, R.D. (2007) A solubility and thermodynamic study of struvite. Environmental Technology 28(9), 1015-1026.

상세보기
Bhuiyan, M.I.H., Mavinic, D.S. and Koch, F.A. (2008) Thermal decomposition of struvite and its phase transition. Chemosphere 70(8), 1347-1356.

상세보기
Bouropoulos, N.C. and Koutsoukos, P.G. (2000) Spontaneous precipitation of struvite from aqueous solutions. Journal of Crystal Growth 213(3-4), 381-388.

상세보기
Carstensen, A., Herdean, A., Schmidt, S.B., Sharma, A., Spetea, C., Pribil, M. and Husted, S. (2018) The impacts of phosphorus deficiency on the photosynthetic electron transport chain. Plant Physiology 177(1), 271-284.

상세보기
Daniel, T.C., Sharpley, A.N., Edwards, D.R., Wedepohl, R. and Lemunyon, J.L. (1994) Minimizing surface water eutrophication from agriculture by phosphorus management. Journal of Soil and Water Conservation 49(2), 30-38.
Ding, Z., Dong, B.Q., Xing, F., Han, N.X. and Li, Z.J. (2012) Cementing mechanism of potassium phosphate based magnesium phosphate cement. Ceramics International 38(8), 6281-6288.

상세보기
Frost, R.L., Weier, M.L. and Erickson, K.L. (2004) Thermal decomposition of struvite - Implications for the decomposition of kidney stones. Journal of Thermal Analysis and Calorimetry 76(3), 1025-1033.

상세보기
Gaterell, M.R., Gay, R., Wilson, R., Gochin, R.J. and Lester, J.N. (2000) An economic and environmental evaluation of the opportunities for substituting phosphorus recovered from wastewater treatment works in existing UK fertiliser markets. Environmental Technology 21(9), 1067-1084.

상세보기
Gertner, J.M. (1987) Phosphorus metabolism and its disorders in childhood. Pediatric annals 16(12), 957-965.

상세보기
Griffith, D.P. (1978) Struvite stones. Kidney International 13(5), 372-382.

상세보기
Hanhoun, M., Montastruc, L., Azzaro-Pantel, C., Biscans, B., Freche, M. and Pibouleau, L. (2011) Temperature impact assessment on struvite solubility product: A thermodynamic modeling approach. Chemical Engineering Journal 167(1), 50-58.

상세보기
Hao, X. and Chang, C. (2002) Effect of 25 annual cattle manure applications on soluble and exchangeable cations in soil. Soil science 167(2), 126-134.

상세보기
Kurtulus, G. and Tas, A.C. (2011) Transformations of neat and heated struvite (MgNH4PO4 center dot 6H(2)O). Materials Letters 65(19-20), 2883-2886.

상세보기
Li, H., Yao, Q.Z., Wang, Y.Y., Li, Y.L. and Zhou, G.T. (2015) Biomimetic synthesis of struvite with biogenic morphology and implication for pathological biomineralization. Scientific Reports 5.

상세보기
Mestres, G. and Ginebra, M.P. (2011) Novel magnesium phosphate cements with high early strength and antibacterial properties. Acta Biomaterialia 7(4), 1853-1861.

상세보기
Michalowski, T. and Pietrzyk, A. (2006) A thermodynamic study of struvite plus water system. Talanta 68(3), 594-601.

상세보기
Muster, T.H., Douglas, G.B., Sherman, N., Seeber, A., Wright, N. and Guzukara, Y. (2013) Towards effective phosphorus recycling from wastewater: Quantity and quality. Chemosphere 91(5), 676-684.

상세보기
Novais, S.V., Zenero, M.D.O., Tronto, J., Conz, R.F. and Cerri, C.E.P. (2018) Poultry manure and sugarcane straw biochars modified with MgCl2 for phosphorus adsorption. Journal of Environmental Management 214, 36-44.

상세보기
Nziguheba, G. (2007) Advances in integrated soil fertility management in sub-Saharan Africa: challenges and opportunities, pp. 149-160, Springer.
Ohlinger, K.N., Young, T.M. and Schroeder, E.D. (1998) Predicting struvite formation in digestion. Water Research 32(12), 3607-3614.

상세보기
Sarkar, A.K. (1991) Hydration/dehydration characteristics of struvite and dittmarite pertaining to magnesium ammonium phosphate cement systems. Journal of Materials Science 26(9), 2514-2518.

상세보기
Sharpley, A., Daniel, T.C., Sims, J.T. and Pote, D.H. (1996) Determining environmentally sound soil phosphorus levels. Journal of Soil and Water Conservation 51(2), 160-166.
Survey, U.G. (2005) Phosphate rock. Mineral Commodity Summaries, 122-123.
Takeda, E., Ikeda, S. and Nakahashi, O. (2012) Lack of phosphorus intake and nutrition. Clinical calcium 22(10), 1487-1491.

상세보기
Van Vuuren, D.P., Bouwman, A.F. and Beusen, A.H. (2010) Phosphorus demand for the 1970-2100 period: a scenario analysis of resource depletion. Global Environmental Change 20(3), 428-439.

상세보기
Yang, F., Zhang, S.S., Sun, Y.Q., Tsang, D.C.W., Cheng, K. and Ok, Y.S. (2019) Assembling biochar with various layered double hydroxides for enhancement of phosphorus recovery. Journal of Hazardous materials 365, 665-673.

상세보기

표제어: PCR

동의어: Packet Collision Rate

용어 설명 출처 목록 (6)

용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증