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All Journal Prosiding Seminar Nasional MIPA Jurnal Sains dan Teknologi International Journal of Community Service Learning International Journal of Natural Science and Engineering INTERNATIONAL JOURNAL OF APPLIED CHEMISTRY RESEARCH
I Gusti Ngurah Agung Suryaputra
Program Studi Kimia Terapan, Jurusan Kimia, Universitas Pendidikan Ganesha
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Social Sciences

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Journal : INTERNATIONAL JOURNAL OF APPLIED CHEMISTRY RESEARCH

 1 
PENGARUH HUTAN MANGROVE TERHADAP ABSORBANSI CHROMOPHORIC DISSOLVED ORGANIC MATTER (CDOM) DAN NUTRIEN DI PANTAI GILIMANUK I Gusti Ngurah Agung Suryaputra
International Journal of Applied Chemistry Research Vol. 3 No. 1 (2021)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijacr.v3i1.59818

Abstract

Pantai Gilimanuk adalah salah satu pantai di Bali dengan hutan mangrove yang panjang. Hutan mangrove adalah salah satu ekosistem yang paling produktif di bumi. Sistem bakau adalah sumber organic matter (OM) yang sangat produktif yang dapat ditransmisikan ke perairan pantai yang berdekatan melalui ekspor detritus dan organisme hidup. Penelitian ini bertujuan untuk mengetahui pengaruh keberadaan hutan mangrove terhadap parameter in-situ, absorbansi CDOM, kadar nutrient dan kadar Total Organic Carbon (TOC). Pengukuran salinitas, suhu, pH, DO dan TDS dilakukan secara in-situ menggunakan alat water quality checker. Pengukuran nilai absorbansi CDOM dan nutrien dilakukan dengan menggunakan instrumen spektrofotometer Ultraviolet Visible (UV-Vis). Pengukuran konsentrasi TOC  dilakukan dengan metode titrasi. Hasil penelitian menunjukkan bahwa hutan mangrove menunjukkan pengaruh terhadap nilai pH, suhu, absorbansi CDOM dan TOC. Sementara hutan mangrove tidak terlihat mempengaruhi parameter salinitas, TDS, konduktivitas, DO dan nutrien. Ketika pasang terjadi penurunan nilai pH dan suhu, sedangkan ketika terjadi surut terjadi peningkatan nilai pH dan suhu. Nilai absobansi CDOM melalui data spectral slope (S275-295) memberikan informasi bahwa ketika pasang absorbansi CDOM menurun, hal ini menunjukkan sumber CDOM berasal dari daratan yang di pesisirnya banyak terdapat hutan mangrove. Pada saat surut, nilai absorbansi CDOM meningkat hal ini menunjukkan bahwa CDOM juga berasal dari daratan.
Efek Fotodegradasi terhadap Chromophoric Dissolved Organic Matter (CDOM) dan Nutrien pada Air Danau I Gusti Ngurah Agung Suryaputra
International Journal of Applied Chemistry Research Vol. 3 No. 2 (2021)
Publisher : Universitas Pendidikan Ganesha

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Abstract

This study's objective was to determine the effect of photodegradation on CDOM and nutrients in Lake Beratan, specifically in a tourism-dominated area. Subjects in this study are the water of Lake Beratan, while the object of this study is the absorbance CDOM, nutrient concentration, DO, pH, and temperature. We measured absorbance and nutrient concentrations using a Shimadzu UV-1800 UV-Vis Spectrophotometer. The spectral slope (S) and E2:E3 ratio were calculated from its absorbance. The result shows the possibility of misinterpretation due to the use of S or E2:E3 alone to express photodegradation. Either one demonstrates that photodegradation seems to decompose CDOM less than biodegradation. However, if we notice its absorbance value, it is clear that the opposite phenomenon, which is reasonable, takes place. We, therefore, conclude that CDOM photodegradation cannot be concluded from S and E2:E3 alone, but its absorbance is also necessary to lead to the right interpretation. Besides CDOM absorbance, photodegradation also affects nutrients in the water. Photodegradation decomposes organic materials into inorganics, whereas organic nitrogen is turned into ammonia and is then oxidised into nitrite and nitrate via nitrification. Overall, photodegradation decreases the concentration of nutrients dissolved in water.
Fotodegradasi dan Biodegradasi Chromophoric Dissolved Organic Matter (CDOM) di Pantai Lovina I Gusti Ngurah Agung Suryaputra
International Journal of Applied Chemistry Research Vol. 4 No. 1 (2022)
Publisher : Universitas Pendidikan Ganesha

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Abstract

This study aimed at determining the effect of photodegradation on CDOM and nutrient alteration on Lovina Beach, especially in a tourism-dominated area. The subject of this study was seawater collected from Lovina Beach and filtered using GF/F 0.7 m with the help of a vacuum pump. The objects of this study were CDOM absorbance and nutrient concentration. Filtered seawater was placed into two containers: one was under sunlight for photodegradation, and the other was kept away from light for biodegradation. A water sample was collected every 2 hours for a total of 12 hours from both containers. Absorbance and nutrient concentration were measured using a UV-1800 Shimadzu UV-Vis Spectrophotometer. The absorbance spectral slope (S) and E2:E3 ratio were calculated from the absorbance. The result shows the possibility of misinterpretation due to the use of S or E2:E3 alone to express photodegradation. Either one demonstrates that photodegradation seems to decompose CDOM less than biodegradation. However, if we notice its absorbance value, it is clear that the opposite phenomenon, which is reasonable, takes place. We, therefore, conclude that CDOM photodegradation cannot be concluded from S and E2:E3 alone, but its absorbance is also necessary to lead to the right interpretation. Beside CDOM absorbance, photodegradation also affects nutrients in the water. Photodegradation decomposes organic materials into inorganics, whereas organic nitrogen is turned into ammonia and is then oxidized into nitrite and nitrate via nitrification. Overall, photodegradation decreases the concentration of nutrients dissolved in water.
Co-Authors Alexander Hamonangan Simamora Anak Agung Gede Agung Basilius Redan Werang