Synthesis of Matrix Si-K-HAs Gel from  Geothermal Sludge and Peat

Srie Muljani; Bambang Wahyudi Wahyudi; S Suprihatin; Ketut Sumada

doi:10.14710/reaktor.18.2.76-83

DOI: https://doi.org/10.14710/reaktor.18.2.76-83

Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat

*Srie Muljani

- Universitas Pembangunan Nasional "Veteran" Jawa Timur, Indonesia

Bambang Wahyudi Wahyudi - Advanced Material Laboratory, University of Pembangunan Nasional Veteran Jawa Timur

S Suprihatin - Advanced Material Laboratory, University of Pembangunan Nasional Veteran Jawa Timur

Ketut Sumada - Waste Treatment Laboratory, University of Pembangunan Nasional Veteran Jawa Timur

Received: 21 Apr 2018; Published: 23 Jun 2018.

How to cite (IEEE): S. Muljani, B. W. Wahyudi, S. Suprihatin, and K. Sumada, "Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat," Reaktor, vol. 18, no. 2, pp. 76-83, Jun. 2018. https://doi.org/10.14710/reaktor.18.2.76-83

How to cite (APA): Muljani, S., Wahyudi, B. W., Suprihatin, S., & Sumada, K. (2018). Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat. Reaktor, 18(2), 76-83. https://doi.org/10.14710/reaktor.18.2.76-83

How to cite (BCREC): Muljani, S., Wahyudi, B. W., Suprihatin, S., Sumada, K. (2018). Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat. Reaktor, 18 (2), 76-83 (doi:10.14710/reaktor.18.2.76-83)

How to cite (Chicago): Muljani, Srie, Bambang W. Wahyudi, S Suprihatin, and Ketut Sumada. "Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat." Reaktor 18, no. 2 (2018): 76-83. Accessed April 5, 2025. https://doi.org/10.14710/reaktor.18.2.76-83

How to cite (Vancouver): Muljani S, Wahyudi BW, Suprihatin S, Sumada K. Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat. Reaktor [Online]. 2018 Jun;18(2):76-83. https://doi.org/10.14710/reaktor.18.2.76-83.

How to cite (Harvard): Muljani, S., Wahyudi, B. W., Suprihatin, S., and Sumada, K., 2018. Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat. Reaktor, [Online] Volume 18(2), pp. 76-83. https://doi.org/10.14710/reaktor.18.2.76-83 [Accessed 5 Apr. 2025].

How to cite (MLA8): Muljani, Srie, Bambang Wahyudi Wahyudi, S Suprihatin, and Ketut Sumada. "Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat." Reaktor, vol. 18, no. 2, 23 Jun. 2018, pp. 76-83 , https://doi.org/10.14710/reaktor.18.2.76-83. Accessed 5 Apr. 2025.

BibTex Citation Data :

@article{Reaktor18633,
    author = {Srie Muljani and Bambang Wahyudi Wahyudi and S Suprihatin and Ketut Sumada},
    title = {Synthesis of Matrix Si-K-HAs Gel from  Geothermal Sludge and Peat},
    journal = {Reaktor},
  volume = {18},
    number = {2},
    year = {2018},
    keywords = {},
    abstract = {  The   synthesis of matrix   silica-potassium-humic acid   gel   (Si-K-HA  s  )     has been performed successfully by   gradual   extraction and acidification method. The extraction was carried out in two stages: 1) extraction of humic   substances   from peat   prepared by potassium hydroxide to produce potassium humate (K-HA S ) solution  , 2) extract  ion   silica from geothermal sludge   using K-HAs solution to produce Si-K-HAs solution. Acidification of Si-K-HAs solution prepared by citric acid   (1-3N)   to produce matrix gel of Si-K-HAs.   The   Si-  K-HAs matrix gel products are characterized by   Fourier Transform InfraRed (  FTIR  )  ,   X-ray fluroscence (  XRF  )  , and Brunauer–Emmett–Teller   (  BET  ) analysis  . The acidification process was carried out in neutral to acid (pH 3-7) conditions and the results showed that at neutral pH no Si-K-HAs gel formed. IR spectra confirm  ed   the presence of humic acid in the gel product, whereas XRF analysis confirm  ed   the presence of potassium (K) and silica (SiO 2 ) in the gel product. The   molar   ratio of SiO 2 :K 2 O in the product is 0.9 - 0.3 in the pH range of 3-  5  .   Si-K-HA  s     powder   can be used as soil fertilizer especially for soils that lack silica, humic, and potassium nutrients   or for future application development  .         Keywords:   gradual extraction; geothermal sludge; matrix gel; humic substance    },
   issn = {2407-5973},   pages = {76--83}  doi = {10.14710/reaktor.18.2.76-83},
    url = {https://ejournal.undip.ac.id/index.php/reaktor/article/view/18633}
}

Refworks Citation Data :

@article{{Reaktor}{18633}, author = {Muljani, S., Wahyudi, B., Suprihatin, S., Sumada, K.}, title = {Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat}, journal = {Reaktor}, volume = {18}, number = {2}, year = {2018}, doi = {10.14710/reaktor.18.2.76-83}, url = {https://ejournal.undip.ac.id/index.php/reaktor/article/view/18633} }

Citation Format:

Abstract

The synthesis of matrix silica-potassium-humic acid gel (Si-K-HAs) has been performed successfully by gradual extraction and acidification method. The extraction was carried out in two stages: 1) extraction of humic substances from peat prepared by potassium hydroxide to produce potassium humate (K-HA_S) solution, 2) extraction silica from geothermal sludge using K-HAs solution to produce Si-K-HAs solution. Acidification of Si-K-HAs solution prepared by citric acid (1-3N) to produce matrix gel of Si-K-HAs. The Si-K-HAs matrix gel products are characterized by Fourier Transform InfraRed (FTIR), X-ray fluroscence (XRF), and Brunauer–Emmett–Teller (BET) analysis. The acidification process was carried out in neutral to acid (pH 3-7) conditions and the results showed that at neutral pH no Si-K-HAs gel formed. IR spectra confirmed the presence of humic acid in the gel product, whereas XRF analysis confirmed the presence of potassium (K) and silica (SiO₂) in the gel product. The molar ratio of SiO₂:K₂O in the product is 0.9 - 0.3 in the pH range of 3-5. Si-K-HAs powder can be used as soil fertilizer especially for soils that lack silica, humic, and potassium nutrients or for future application development.

Keywords: gradual extraction; geothermal sludge; matrix gel; humic substance

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Section: Research Article

Language : EN

In Volume 18 No. 2 June 2018

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