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All Journal JOURNAL ONLINE OF PHYSICS Sains Natural: Journal of Biology and Chemistry
Diana Novita Sari
Jurusan Fisika, Fakultas Teknik, Universitas Bangka Belitung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Physics

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PENGARUH JARAK, KEMIRINGAN, DAN INTENSITAS CAHAYA PADA ANALISIS UKURAN PORI MASKER KAIN MENGGUNAKAN SMARTPHONE Meri Hamdini; Diana Novita Sari; Susanti Susanti; Yuant Tiandho
JOURNAL ONLINE OF PHYSICS Vol. 7 No. 1 (2021): JOP (Journal Online of Physics) Vol 7 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v7i1.14502

Abstract

One of the common strategies used to minimize the spread of Covid-19 is to wear a cloth mask. Cloth masks have a lower effectiveness value compared to other types of masks but have the potential to be used as an alternative, especially during a pandemic. Smartphone can be used as an initial idea for determining the quality of a cloth mask. In taking pore images, there are factors that have the potential to affect the results of pore size, namely distance, angle of inclination, and light intensity. Taking photos of masks with a magnification application is done with three variations, namely distance, angle, and light intensity. The distance for taking pore images is varied to 3, namely 8 cm; 10 cm; and 12 cm. The image capture angle is varied to 0p; 5o; and 10o. measurement using a distance of 10 cm has the closest value from the measurement results by taking images using a microscope, which is 0.232 mm. In the variation of the angle, the angle that is parallel or 0o to the plane of the cloth mask has a value that is close to the microscope measurement, which is 0.232 mm. The light intensity measured using a lux meter which shows the results of 240 has a value that is closest to taking an image using a microscope, which is 0.221 mm.
Utilization of Iron Scrap for Palm Oil Mill Effluent Treatment by Fenton and Foto-Fenton Processes Diana Novita Sari; Dea Amelia; Muhammad David Ramadhon; Yuant Tiandho
JURNAL SAINS NATURAL Vol. 12 No. 2 (2022): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (542.424 KB) | DOI: 10.31938/jsn.v12i2.341

Abstract

The increase in the amount of palm oil production impacts increasing the total liquid waste from the processing of palm oil. Palm oil mill effluent (POME) has high chemical oxygen demand (COD) and biochemical oxygen demand (BOD) parameters that can cause environmental pollution. This study processed POME using the Fenton mechanism using reagents derived from scrap iron. The Fenton mechanism is one of the advanced oxidation process technology (AOPs) in wastewater treatment. To improve the performance of the Fenton mechanism, the researchers integrated it with UV-rays in the photo-Fenton mechanism scheme. Fenton and photo-Fenton processes effectively reduce the pH, BOD, and COD of POME. The COD removal efficiency was 99.91%, while the BOD removal efficiency was 99.93%. The more FeSO4 added to the wastewater, the more significant the reduction of BOD and COD in the Fenton and photo-Fenton processes. Also, photo-Fenton is more effective than the Fenton process to reduce BOD and COD in the POME.Keywords: POME; Fenton; Photo-Fenton; Scrap ironABSTRAKPemanfaatan Besi Bekas untuk Pengolahan Limbah Cair Industri Kelapa Sawit Melalui Proses Fenton dan Foto-FentonMeningkatnya jumlah produksi kelapa sawit, berdampak pada peningkatan total limbah cair dari hasil pengolahan kelapa sawit. Limbah cair industri kelapa sawit atau Palm Oil Mill Effluent (POME) memiliki nilai parameter chemical oxygen demand (COD) dan biochemical oxygen demand (BOD) yang tinggi sehingga dapat menyebabkan pencemaran lingkungan. Di dalam penelitian ini, dilakukan pengolahan POME menggunakan mekanisme Fenton menggunakan reagen yang berasal dari besi bekas. Mekanisme Fenton adalah salah satu pengembangan dari teknologi proses oksidasi maju (AOPs) dalam pengolahan air limbah.  Untuk meningkatkan performa dari mekanisme Fenton, peneliti mengintegrasikan system tersebut dengan sinar-UV dalam skema mekanisme foto-Fenton. Proses Fenton dan foto-Fenton sangat efektif dalam menurunkan pH, BOD dan COD dari POME. Efisiensi penyisihan COD mencapai 99,91%, sedangkan efisiensi penyisihan BOD mencapai 99,93%. Semakin banyak FeSO4 yang ditambahkan ke dalam air limbah maka semakin besar reduksi BOD dan COD dalam proses Fenton dan foto-Fenton. Selain itu, foto-Fenton lebih efektif dibandingkan dengan proses Fenton dalam mereduksi BOD dan COD dalam POMEKata kunci : POME; Fenton; foto-Fenton; besi bekas
Co-Authors Dea Amelia Meri Hamdini Muhammad David Ramadhon Susanti Susanti Yuant Tiandho