Preparation of Calcite-Precipitating Bacteria-Embedded Magnesium Phosphate Cement for Self-Healing Application

Umesh Jadhav

Makale detayları

Preparation of Calcite-Precipitating Bacteria-Embedded Magnesium Phosphate Cement for Self-Healing Application

Yazarlar:

Umesh Jadhav

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Civil Construction Engineering

Dergi:

Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 1, pp.1-10

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001314129

pISSN:

2458-973X

Anahtar kelimeler:

Özet:

 The present study was undertaken to check the feasibility of magnesium phosphate cement MPC for the immobilization of calcite-precipitating bacteria. An aqueous route of MPC synthesis was followed using magnesium phosphate Mg3PO42 powder and ammonium phosphate solution. The Fourier-transform infrared spectroscopy FTIR and scanning electron microscopy SEM analysis confirmed the synthesis of MPC. The thermal decomposition analysis TGA showed decomposition of struvite between 5060 C - Paenibacillus sp. NCIM 5410 was used due to its urea hydrolysis ability. pH 9 was found to be optimum for urea hydrolysis. The urea hydrolysis steadily decreased with an increase in temperature from 30 C to 60 C. The hydrolysis was seen to increase with an incubation time of up to 72 h and subsequently reduced. The bacteria showed 90 urea hydrolysis at pH 9, 30 C temperature, and after 72 h. The bacterial spores were incorporated during MPC synthesis, which helped their immobilization. The bacterial spore-containing MPC decomposed around 70 0.48 of urea. Further, calcite precipitation was studied. The precipitate formed due to bacterial action in the MPC crack showed the presence of calcium. The calcite precipitation helped to reduce the water absorption by MPC specimens. The spore containing MPC specimens showed around 2.62 0.55  water absorption. These results suggest that it is possible to synthesize bioactive MPC by immobilizing bacterial spores in MPC.

 The present study was undertaken to check the feasibility of magnesium phosphate cement MPC for the immobilization of calcite-precipitating bacteria. An aqueous route of MPC synthesis was followed using magnesium phosphate Mg3PO42 powder and ammonium phosphate solution. The Fourier-transform infrared spectroscopy FTIR and scanning electron microscopy SEM analysis confirmed the synthesis of MPC. The thermal decomposition analysis TGA showed decomposition of struvite between 5060 C - Paenibacillus sp. NCIM 5410 was used due to its urea hydrolysis ability. pH 9 was found to be optimum for urea hydrolysis. The urea hydrolysis steadily decreased with an increase in temperature from 30 C to 60 C. The hydrolysis was seen to increase with an incubation time of up to 72 h and subsequently reduced. The bacteria showed 90 urea hydrolysis at pH 9, 30 C temperature, and after 72 h. The bacterial spores were incorporated during MPC synthesis, which helped their immobilization. The bacterial spore-containing MPC decomposed around 70 0.48 of urea. Further, calcite precipitation was studied. The precipitate formed due to bacterial action in the MPC crack showed the presence of calcium. The calcite precipitation helped to reduce the water absorption by MPC specimens. The spore containing MPC specimens showed around 2.62 0.55  water absorption. These results suggest that it is possible to synthesize bioactive MPC by immobilizing bacterial spores in MPC.

 The present study was undertaken to check the feasibility of magnesium phosphate cement MPC for the immobilization of calcite-precipitating bacteria. An aqueous route of MPC synthesis was followed using magnesium phosphate Mg3PO42 powder and ammonium phosphate solution. The Fourier-transform infrared spectroscopy FTIR and scanning electron microscopy SEM analysis confirmed the synthesis of MPC. The thermal decomposition analysis TGA showed decomposition of struvite between 5060 C - Paenibacillus sp. NCIM 5410 was used due to its urea hydrolysis ability. pH 9 was found to be optimum for urea hydrolysis. The urea hydrolysis steadily decreased with an increase in temperature from 30 C to 60 C. The hydrolysis was seen to increase with an incubation time of up to 72 h and subsequently reduced. The bacteria showed 90 urea hydrolysis at pH 9, 30 C temperature, and after 72 h. The bacterial spores were incorporated during MPC synthesis, which helped their immobilization. The bacterial spore-containing MPC decomposed around 70 0.48 of urea. Further, calcite precipitation was studied. The precipitate formed due to bacterial action in the MPC crack showed the presence of calcium. The calcite precipitation helped to reduce the water absorption by MPC specimens. The spore containing MPC specimens showed around 2.62 0.55  water absorption. These results suggest that it is possible to synthesize bioactive MPC by immobilizing bacterial spores in MPC.

 The present study was undertaken to check the feasibility of magnesium phosphate cement MPC for the immobilization of calcite-precipitating bacteria. An aqueous route of MPC synthesis was followed using magnesium phosphate Mg3PO42 powder and ammonium phosphate solution. The Fourier-transform infrared spectroscopy FTIR and scanning electron microscopy SEM analysis confirmed the synthesis of MPC. The thermal decomposition analysis TGA showed decomposition of struvite between 5060 C - Paenibacillus sp. NCIM 5410 was used due to its urea hydrolysis ability. pH 9 was found to be optimum for urea hydrolysis. The urea hydrolysis steadily decreased with an increase in temperature from 30 C to 60 C. The hydrolysis was seen to increase with an incubation time of up to 72 h and subsequently reduced. The bacteria showed 90 urea hydrolysis at pH 9, 30 C temperature, and after 72 h. The bacterial spores were incorporated during MPC synthesis, which helped their immobilization. The bacterial spore-containing MPC decomposed around 70 0.48 of urea. Further, calcite precipitation was studied. The precipitate formed due to bacterial action in the MPC crack showed the presence of calcium. The calcite precipitation helped to reduce the water absorption by MPC specimens. The spore containing MPC specimens showed around 2.62 0.55  water absorption. These results suggest that it is possible to synthesize bioactive MPC by immobilizing bacterial spores in MPC.

Makale detayları

Preparation of Calcite-Precipitating Bacteria-Embedded Magnesium Phosphate Cement for Self-Healing Application

Yazarlar:

Umesh Jadhav

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Civil Construction Engineering

Dergi:

Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 1, pp.1-10

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001314129

pISSN:

2458-973X

Bacteria

Calcite precipitation

Magnesium phosphate cement

Self-healing

Sayı

Makale detayları

Preparation of Calcite-Precipitating Bacteria-Embedded Magnesium Phosphate Cement for Self-Healing Application

Yazarlar: Umesh Jadhav

Yayıncı: Yildiz Technical University

Ana Başlıklar: Civil Construction Engineering

Dergi: Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 1, pp.1-10

Belge Tipi: Makale

Yayın Tarihi: 3/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001314129

pISSN: 2458-973X

Bacteria

Calcite precipitation

Magnesium phosphate cement

Self-healing

Sayı

Yazarlar:

Umesh Jadhav

Yayıncı:

Yildiz Technical University

Ana Başlıklar:

Civil Construction Engineering

Dergi:

Journal of Sustainable Construction Materials and Technologies Vol.9 Issue 1, pp.1-10

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001314129

pISSN:

2458-973X