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All Journal Jurnal Sains dan Pendidikan Fisika Journal of Degraded and Mining Lands Management PELS (Procedia of Engineering and Life Science)
Hidawati, Hidawati
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Physics

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EKSTRAKSI NANOPERAK (Ag) DARI BAHAN DASAR PERAK NITRAT (AgNO3) MENGGUNAKAN DAUN KETAPANG (TERMINALIA KATAPPA) Hidawati, Hidawati; Junaedi, Subaer
Jurnal Sains dan Pendidikan Fisika Vol 12, No 2 (2016): JURNAL SAINS DAN PENDIDIKAN FISIKA
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (204.552 KB) | DOI: 10.35580/jspf.v12i2.2173

Abstract

This study reviews how much silver (Ag) resulting from the extraction of silver nitrate (AgNO3) using ketapan leaf (Terminalia catappa). The purpose of this research is to study the crystal structure and morphology nanosilver with various compositions extract from silver nitrate (AgNO3). Silver nitrate was extracted by using ketapan leaves, which ketapan leaves firstly washed and then cut to resemble tea powder, after that, the ketapan powder was added with 100 ml of distilled water and 1 g AgNO3. For samples 1 (S1) and sampel 2 (S2) the ketapan leaf powder was boiled in 100 ml distilled water. The results of this study showed that the samples S1 produce 78.5% nanosilver, sample S2 produce 85,2% nanosilver, and sample S3 produce 100% nanosilver. The crystal structure of the resulting sample was analyzed with XRD while the morphology was analyzed with SEM. The XRD and SEM result showed that the structure of the crystal was in crystal phase and the morphology of the sample was flat-shaped with crystal size was of 14.00 nm, 10.54 nm, and 10.53 nm. Keywords: extraction, nanosilver, terminalia katappa Penelitian ini mengkaji tentang seberapa besar perak (Ag) yang dihasilkan dari ekstraksi perak nitrat (AgNO3) dengan menggunakan daun ketapang (terminalia catappa). Tujuan dari penelitian ini untuk mempelajari struktur kristal dan morfologi nanoperak dengan komposisi yang berbeda-beda berbahan dasar perak nitrat (AgNO3). Perak Nitrat diekstraksi dengan menggunakan daun ketapang, dimana daun ketapang terlebih dahulu dicuci kemudian digunting hingga menyerupai serbuk teh, setelah itu sarbuk daun ketapang diberikan aquades sebanyak 100 ml dan AgNO3 sebanyak 1 gr, untuk sampel 1 dan 2 serbuk daun ketapang direbus dengan menggunakan aquades sebanyak 100ml. Hasil penelitian menunjukkan bahwa untuk sampel S1 menghasilkan 78,5% sampel S2 85,2% dan sampel S3 100%. Struktur kristal sampel yang dihasilkan dianalisis dengan menggunakan XRD sedangkan morfologi nanoperak dianalisis dengan menggunakan SEM. Hasil XRD dan SEM menunjukkan bahwa struktur kristal sampel membentuk fase kristal dengan morfologi sampel berbentuk pipih dengan ukuran kristal 14,00 nm, 10,54 nm, dan 10.53 nm. Kata Kunci:daun ketapang, ekstraksi, nanoperak
Utilization of BCFS (Biomass Coal Fuel-Sludge) As Substitution of Energy Sources in Industrial Boilers: Pemanfaatan BCFS (Biomass Coal Fuel-Sludge Sebagai Substitusi Sumber Energi di Boiler Industri Arifin, Danang Nor; Hidawati, Hidawati
Procedia of Engineering and Life Science Vol. 4 (2023): Proceedings of the 6th Seminar Nasional Sains 2023
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pels.v4i0.1382

Abstract

The utilization of coal as an energy source is still the main choice of the textile industry in Indonesia. The process of this utilization left 20% of FABA (fly ash-bottom ash) where 80% of them were bottom ashes which are considered hazardous and toxic waste. This study aims to obtain the technology and production process for treating bottom ash and biomass from urban waste as an alternative energy source and reducing environmental problems (zero waste: waste to energy and waste to material). Biomass Coal Fuel-Sludge (BCFS) Briquettes as a product derived from bottom ash, biomass, and biosludge had a composition of 50%: 30%: 20%. The briquettes utilization can reduce coal use by 16% and increase boiler temperature to 35°C - 75°C. The emission in the trial burning test which were the particulates, sulfur dioxide, and nitrogen dioxide met the quality standards required in the Technical Approval in the Sector of Hazardous Waste Management from the Ministry of Environment and Forestry. With this research, the BCFS briquette products can be a solution to the utilization of B3 waste and waste problems.
Performances of phosphate-solubilizing microorganisms on soil chemical properties under different soil characteristics: a meta-analysis Bachtiar, Taufiq; Syahputra, Akhmad Rasyid; Citraresmini, Ania; Nurjayati, Ratih; Hidawati, Hidawati; Rachmawati, Veny; Mulyono, Asep
Journal of Degraded and Mining Lands Management Vol. 11 No. 4 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.114.6351

Abstract

The addition of phosphate-solubilizing microorganisms (PSM) as biofertilizers can improve the quality of soil properties. A meta-analysis study was conducted to analyze the effect of PSM on soil properties. This meta-analysis has analyzed 20 research articles published between 1990 and 2023, which have reported the influence of PSM on soil properties. The value of effect size (ES) Hedges'd of available-P is 3.047 (p<0.001), ES of available K is 2.102 (p<0.001), ES of soil nitrogen (N) is 1.706 (p<0.001), ES of pH is  -2.738 (p<0.001), ES of soil organic carbon (SOC) is 1.087 (p=0.004), ES of N-NH4 is 0.636 (p= 0.013), ES of N-NO3 is 2.643 (p< 0.001), ES of phosphatase is 5.001 (p< 0.001), ES of alkaline phosphatase is 22.956 (p<0.001), and ES of acid phosphatase is 23.104 (p<0.001). The results showed that in terms of phosphate solubility, PSM is more effective on alkaline soils with high SOC content, very high P availability, and a sandy loam texture. PSM is more effective for K solubility on acidic soils, with very high SOC content, high P availability, and a loamy texture. PSM is effective in increasing soil N with acid soil characteristics, low SOC content, moderate available P content, and clay texture. According to this study, the Penicillium fungus ranks second in the fungal group in terms of phosphate solubilization capacity after the genus Azotobacter. The genus Peronospora showed the greatest potential in increasing soil N. In contrast, Burkholderia showed the greatest effectiveness in solubilizing K.
Co-Authors Akhmad Rasyid Syahputra, Akhmad Rasyid Ania Citraresmini Arifin, Danang Nor Asep Mulyono Nurjayati, Ratih Subaer - Taufiq Bachtiar Veny Rachmawati