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All Journal ALCHEMY Jurnal Penelitian Kimia Jurnal Pengabdian Pada Masyarakat
Teguh Endah Saraswati
Universitas Sebelas Maret
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Materials Science & Nanotechnology Other

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Hand Sanitizer dari Daun Mangga sebagai Upaya Menekan Penyebaran Pandemi Covid-19 di Wilayah Jebres dan Polokarto Maria Ulfa; Ida Setiarini; Ika Uswatun Hasanah; Kusumandari Kusumandari; Teguh Endah Saraswati
Jurnal Pengabdian Pada Masyarakat Vol 6 No 4 (2021)
Publisher : Universitas Mathla'ul Anwar Banten

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30653/002.202164.900

Abstract

HAND SANITIZER FROM MANGO LEAVES AS AN EFFORT TO SUPPRESS THE SPREAD OF THE COVID-19 PANDEMIC IN THE JEBRES AND POLOKARTO REGIONS. Covid-19 is an international pandemic that still has many victims. The UNS Campus area is a vulnerable area because apart from being public, there are also many residents who live around the campus which can be a medium for spreading the virus. The implementation of the health protocol, one of which is washing hands with running water or using a hand sanitizer, is one of the preventive measures to prevent the spread of the virus. Synthetic hand sanitizers have a lot of impact, especially for people who are sensitive to chemicals such as alcohol or synthetic disinfectants. On the other hand, the use of hand sanitizers has an important position to suppress the spread of the virus because it has the power to deactivate proteins from the Covid-19 spike section. Therefore, a breakthrough is needed to make natural hand sanitizers that are cheaper and have long-term sustainability. One of the natural ingredients that have a high antibacterial content is mango leaves. Various studies have stated that the tannin content of mango leaves is around 1.0 mg/g capable of deactivating bacteria and viruses. Unfortunately, so far, mango leaves are not used much except as fertilizer and more is wasted as garbage. In addition, the long pandemic period has caused the community not to have large reserves of hand sanitizers for their daily needs. Therefore, in this community service, training on the manufacture of hand sanitizers was carried out in the area around the UNS campus to provide skills to the community in procuring hand sanitizers independently from the plants around them as well as providing stock of natural hand sanitizers for people who are sensitive to chemicals.
TiO2-N/Polystyrene photocatalyst-combined Corona Plasma Treatment for Methylene Blue Degradation Kusumandari Kusumandari; Ahmad Qusnudin; Teguh Endah Saraswati; Davit Dhruv
ALCHEMY Jurnal Penelitian Kimia Vol 20, No 1 (2024): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.20.1.76692.62-69

Abstract

This study employed the corona plasma method combined with TiO2-N/PS photocatalyst to degrade dye pollutants. The plasma reactor consisted of two needle-shaped stainless steel electrodes connected to a voltage of 8 kV. Methylene blue (MB) solution was used as a model pollutant with varied initial concentrations of 10, 50, and 100 ppm. The degradation efficiency was evaluated based on the absorbance of the degraded MB solution measured using a UV-Vis spectrophotometer. The results exhibited that the longer plasma treatment duration caused the absorbance value of the degraded MB to decrease, and then the MB degradation efficiency increased. MB-10 demonstrated a maximum degradation efficiency of 99.40% after plasma treatment for 30 minutes. Meanwhile, MB-50 and MB-100 reached maximum degradation efficiencies of 95.29 and 86.55% efficiency after plasma treatment for 60 minutes. The greater initial MB concentration caused the longer degradation process. Furthermore, the results revealed no increase in degradation efficiency due to the addition of TiO2-N/PS photocatalyst into the plasma treatment. The degradation efficiencies of MB-10, MB-50, and MB-100 under TiO2-N/PS-combined plasma treatment for 30 min were 94.48, 81.57, and 5.22%, respectively. This suggests the possibility that the UV light generated during the plasma process cannot activate the TiO2-N/PS photocatalyst.
Co-Authors Ahmad Qusnudin Asy Syifa Labibah Davit Dhruv Dwi Teguh Rahardjo Ida Setiarini Ika Uswatun Hasanah Kusumandari Kusumandari Kusumandari, Kusumandari Ulfa, Maria