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S, Agustina Dyah
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

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Tannin Test on Celery Leaves (Apium graveolens L.) Using UV-Vis Spectrophotometry Method as an Active Ingredient in Hand Sanitizer Adelina, Dina; Adlin, Irman Ansari; S, Agustina Dyah; Junita, Rusnia
Jurnal Teknologi Vol 25, No 2 (2025): Agustus 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i2.6845

Abstract

This study looks into whether celery leaves (Apium graveolens L.) could be used as a source of tannins for making hand sanitizer. This study attempts to find a natural antibacterial agent that can be used instead of hand sanitizers, which are in high demand during the COVID-19 pandemic. The goal was to measure the amount of tannins in celery leaves and see how well they work in hand sanitizers. We used the UV-Vis spectrophotometry approach to find out how much tannin there was, using quercetin as a benchmark. We used maceration with 96% ethanol to get the tannins out, and then we distilled them. The results showed that there was a strong linear association between absorbance and tannin concentration. The average tannin content was 0.1397 mg/g. Then, the celery leaf extract was added to hand sanitizer gels. Successful organoleptic testing showed that the composition was physically stable and had antibacterial properties. This study shows how to use local plant materials, such celery leaves, to make hand sanitizers that are good for the environment and work well. This is a better option than chemical-based solutions. The results show that this method could work on other plants with similar traits.
Penurunan Kadar COD (Chemical Oxygen Demand) Air Sungai Cisadane Menggunakan Metode Fenton Adelina, Dina; Indrawati, Wiwik; Filosa, Aminudin; Hakim, Rusnia Junisa; S, Agustina Dyah; Ismet, Rhahmasari; Yullia, Nuke; Lita, Nurul
Jurnal Teknologi Vol 26, No 1 (2026): April 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i1.8810

Abstract

The Cisadane River is one of the main water resources in Tangerang and surrounding areas. However, its water quality has declined due to domestic and industrial pollution, which increases the Chemical Oxygen Demand (COD) level. This study aimed to evaluate the effectiveness of the Fenton method in reducing COD levels in Cisadane River water and to determine the optimum reaction time for the treatment process. The experiment was conducted using 100 mL of river water sample treated with Fenton reagent consisting of FeSO₄ 0.3 M and H₂O₂ 0.8 M. The treatment was carried out at reaction times of 60, 120, 180, and 240 minutes, and COD levels were analyzed using a photometer. The results showed that the initial COD concentration of 495 mg/L decreased to 290 mg/L after 60 minutes, 195 mg/L after 120 minutes, 145 mg/L after 180 minutes, and 95 mg/L after 240 minutes. The highest COD removal efficiency was achieved at 240 minutes, with a reduction of 80.81%, and the final COD concentration met the domestic wastewater quality standard of 100 mg/L. In conclusion, the Fenton method was effective in reducing COD levels in Cisadane River water, with the optimum treatment time obtained at 240 minutes.
Co-Authors Adelina, Dina Adlin, Irman Ansari Filosa, Aminudin Hakim, Rusnia Junisa Ismet, Rhahmasari Junita, Rusnia Lita, Nurul Wiwik Indrawati, Wiwik Yullia, Nuke