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All Journal VALENSI Bioma : Jurnal Biologi dan Pembelajaran Biologi
Abner Tonu Lema
Fakultas MIPA Universitas Brawijaya Jalan Veteran Malang 65145
Agriculture, Biological Sciences & Forestry Chemistry

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ANALISIS KANDUNGAN POLIFENOL PADA EKSTRAK TUNAS BAMBU BETUNG (Dendrocalamus asper) Padamani, Eklopas; Ngginak, James; Lema, Abner Tonu
BIOMA Vol 5, No 1 (2020): BIOMA : JURNAL BIOLOGI DAN PEMBELAJARAN BIOLOGI
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/bioma.v5i1.3688

Abstract

Kelompok senyawa polifenol memiliki kemampuan sebagai antioksidan. Dalam tulisan ini peneliti melakukan skrining polifenol pada sampel tunas bambu betung (Dendrocalamus asper) yang diperoleh dari desa Mataru Kabupaten Alor. Pengukuran kadar polifenol secara kualitatif menggunakan larutan FeCl3 1% dan pengujian secara kuantitatif menggunakan metode spektrofotometeri UV-Vis (CE 2021). Hasil pengukuran secara kualitatif menunjukan bahwa pada sampel terkandung senyawa polifenol. Hal ini diperkuat dengan adanya indikator pembentukan warna coklat kehitaman yang pekat. Pengukuran secara kuantitatif menggunakan Spektrofotometri UV-Vis (CE 2021) menunjukan bahwa pada sampel terkandung senyawa polifenol dengan total kadar 8,065 mg/L. Penelitian ini diharapkan dapat memberikan informasi bagi bidang farmakologi tentang tunas bambu betung sebagai salah satu sumber polifenol dan masyarakat tentang pemanfaatan tunas bambu betung sebagai salah satu sumber polifenol dalam pengawetan bahan makanan yang mudah teroksidasi.
Low-Cost Adsorbent Development: Sulfuric Acid-Activated Teak Sawdust for Effective Methylene Blue Removal Baunsele, Anselmus Boy; Missa, Hildegardis; Siswanta, Dwi; Naat, Johnson N.; Neolaka, Yantus A. B.; Nitti, Fidelis; Lema, Abner Tonu; Basuki, Rahmat; Rahayu, Rahayu
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.41425

Abstract

The expansion of the global textile industry has resulted in a decline in environmental quality. Environmental pollution resulting from textile dye waste may include heavy metals and dyes, which exhibit carcinogenic and mutagenic effects. Many studies have been done to reduce the harm of dyes. Extensive research has been undertaken to mitigate the detrimental effects of dyes. One cost-effective approach for managing dye pollution is the adsorption of methylene blue using sulfuric acid-activated teak sawdust. Teak wood sawdust, a byproduct of the furniture industry that is abundant and underutilized, contains active sites within its constituent compounds, including cellulose, hemicellulose, and lignin. This study was designed to determine the ability of teak sawdust to adsorb methylene blue. In this investigation, the biosorbent will be characterized using fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and scanning electron microscopy-energy dispersive X-ray (SEM-EDX) to analyze its active sites and surface morphology. Additionally, the study aimed to elucidate the impact of variation contact time, pH solution, and alteration in methylene blue concentration on the adsorption capacity for methylene blue, employing a UV-Vis spectrophotometer for measurement. The research results demonstrated that optimal adsorption occurred at a contact time of 30 minutes and a pH of 6, with the adsorption efficiency reaching 99.67% as a function of contact time. The kinetic study was modeled using a pseudo-second-order approach, with a kinetic constant of 79.71 g mg⁻¹ min⁻¹. The maximum adsorption capacity was 1.351 mg g⁻¹, the n value was 1, and the percentage of methylene blue adsorbed reached 99.88%.
Low-Cost Adsorbent Development: Sulfuric Acid-Activated Teak Sawdust for Effective Methylene Blue Removal Baunsele, Anselmus Boy; Missa, Hildegardis; Siswanta, Dwi; Naat, Johnson N.; Neolaka, Yantus A. B.; Nitti, Fidelis; Lema, Abner Tonu; Basuki, Rahmat; Rahayu, Rahayu
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.41425

Abstract

The expansion of the global textile industry has resulted in a decline in environmental quality. Environmental pollution resulting from textile dye waste may include heavy metals and dyes, which exhibit carcinogenic and mutagenic effects. Many studies have been done to reduce the harm of dyes. Extensive research has been undertaken to mitigate the detrimental effects of dyes. One cost-effective approach for managing dye pollution is the adsorption of methylene blue using sulfuric acid-activated teak sawdust. Teak wood sawdust, a byproduct of the furniture industry that is abundant and underutilized, contains active sites within its constituent compounds, including cellulose, hemicellulose, and lignin. This study was designed to determine the ability of teak sawdust to adsorb methylene blue. In this investigation, the biosorbent will be characterized using fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and scanning electron microscopy-energy dispersive X-ray (SEM-EDX) to analyze its active sites and surface morphology. Additionally, the study aimed to elucidate the impact of variation contact time, pH solution, and alteration in methylene blue concentration on the adsorption capacity for methylene blue, employing a UV-Vis spectrophotometer for measurement. The research results demonstrated that optimal adsorption occurred at a contact time of 30 minutes and a pH of 6, with the adsorption efficiency reaching 99.67% as a function of contact time. The kinetic study was modeled using a pseudo-second-order approach, with a kinetic constant of 79.71 g mg⁻¹ min⁻¹. The maximum adsorption capacity was 1.351 mg g⁻¹, the n value was 1, and the percentage of methylene blue adsorbed reached 99.88%.
Co-Authors Anselmus Boy Baunsele Dwi Siswanta Fidelis Nitti Hildegardis Missa James Ngginak Naat, Johnson N. Neolaka, Yantus A B Padamani, Eklopas Rahayu Rahayu Rahmat Basuki