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PENENTUAN KADAR NITROGEN DIOKSIDA (NO2) DALAM UDARA AMBIEN DENGAN METODE GRIESS SALTZMAN MENGGUNAKAN SPEKTROFOTOMETER Futeri, Renny; Armin, M. Ikhlas; Samah, Selfa Dewati; Putri, Gustiarini Rika; Elisma, Netri; Syafrinal, Syafrinal; Putri, Melysa; Santia, Anisa Dwi
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 20, No 2 (2023): VOL 20 NO 2 DESEMBER 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/sainti.v20i2.241

Nitrogen dioxide (NO2) contributes greatly as a precursor to a number of harmful secondary air pollutants including nitric acid, the nitrate portion of secondary inorganic aerosols and oxidants including ozone. Nitrogen dioxide gas (NO2) is an ambient air pollutant along with the element nitrogen monoxide (NO) which is usually produced from human activities such as burning vehicle engine fuel, burning rubbish, burning coal and industry. This research aims to monitor the quality of air pollution in industrial areas in East Jakarta. The NO2 content in the air can be determined using the UV-Vis spectrophotometer method based on SNI 7119-2: 2017. The principle of NO2 testing uses a UV-Vis spectrophotometer based on SNI 7119-2: 2017. From the results of the tests carried out, it can be concluded that the NO2 level obtained in sample 1 was found to be 25,153 µg/Nm3, in sample 2 the NO2 level was 28,371 µg/Nm3, in sample 3 the NO2 level was 107,022 µg/Nm3, in sample 4 the NO2 level was 29,720 µg/Nm3. Nm3, and in sample 5 the NO2 level was 83.446 µg/Nm3. Based on PP RI No. 22 attachment VII of 2021 concerning air pollution control, the quality standard for NO2 is 200 µg/Nm3 for 1 hour. So it can be concluded from the results of the tests that have been carried out that the NO2 levels in the environment are still below the quality standard, which means that it is not a source of NO2 pollution, is safe and meets the requirements for human health and the environment.

Rancang Bangun Mesin Pengupas Kulit Kacang Tanah Menggunakan Motor Listrik Dengan Tipe Silinder Horizontal Menggunakan Bahan Pisau ST 37 Anderson, Sir; Yuliarman, Yuliarman; Maimuzar, Maimuzar; Nasirwan, Nasirwan; Nusyirwan, Nusyirwan; Nofriadi, Nofriadi; Elisma, Netri; Insani, Farhan Filza
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1603

Peanuts are a plant that is widely cultivated in Indonesia, but the process of peeling the skin is still often done manually, which requires a lot of time and effort. To increase efficiency in this process, a peanut peeling machine with a horizontal cylinder design was developed. This innovation is designed to make it easier for farmers and small entrepreneurs to peel peanuts with a larger production capacity. This peeling machine is equipped with a nut discharge regulation system and uses a 1 Hp electric motor with a speed of 1400 rpm which is transmitted to 700 rpm. The stripping process is carried out by putting the dried peanuts into the hopper, then the knife cylinder rotates to separate the husks from the peanuts. The system is supported by a belt and pulley mechanism that ensures smooth operation of the machine. The test results showed that this machine was able to peel peanuts with a capacity of 64 kg/hour, providing a significant increase in productivity when compared to manual methods. This machine is expected to provide a more efficient solution for the agricultural industry and home businesses in peanut processing.

Optimizing Product Downstream and Management of Gambir Liquid Waste in Sopang Micro, Small and Medium Enterprises, Limapuluh Kota Regency Sari, Risma; G, Gusfiyesi; Elisma, Netri; Prasada, Taufik Eka; D, Dartini; Bahar, Imelda; Asria, Merry
Nanggroe: Jurnal Pengabdian Cendikia Vol 4, No 10 (2025): Januari
Publisher : Yayasan Daarul Huda Kruengmane

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.14942880

A series of Community Service activities has been carried out, focusing on assisting the downstream processing of gambir products and liquid waste in Micro, Small, and Medium Enterprises, as well as in the Gambir Farmers Association in Mungka District, Fifty Cities Regency. This activity was motivated by the challenges faced by members of the association, who produce gambir soap, gambir tea, and catechins that are not yet free from tannins. Unfortunately, the gambir soap produced lacks market value, has unappealing packaging, and does not provide optimal benefits to users, leading to decreased buyer interest. Additionally, the liquid waste generated from gambir production has not been adequately managed or treated to be environmentally friendly. Prior to the implementation of activities at the partner location, preparations were made, including sampling wastewater as a model for treating gambir production wastewater, clarifying wastewater, and enhancing the process of making gambir-based soap in the chemistry analysis laboratory at the ATI Polytechnic in Padang. In this activity, we aimed to provide solutions by broadening the partners' understanding of the downstream processing of gambir products and waste. Three key issues were addressed: catechin isolation, the production of catechin-based beauty soap, and the treatment of liquid waste from gambir production. The downstream processing of gambir products into more commercially valuable items is expected to provide solutions, while the liquid waste can eventually be processed into clean water, with the residue being converted into fertilizer. The activity was attended by 40 members of the Gambir Farmers Association, as well as the village head of Talang Maur, local officials, and the association's management.

Optimizing Product Downstream and Management of Gambir Liquid Waste in Sopang Micro, Small and Medium Enterprises, Limapuluh Kota Regency Sari, Risma; G, Gusfiyesi; Elisma, Netri; Prasada, Taufik Eka; D, Dartini; Bahar, Imelda; Asria, Merry
Nanggroe: Jurnal Pengabdian Cendikia Vol 4, No 10 (2025): Januari
Publisher : Yayasan Daarul Huda Kruengmane

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.14942880

A series of Community Service activities has been carried out, focusing on assisting the downstream processing of gambir products and liquid waste in Micro, Small, and Medium Enterprises, as well as in the Gambir Farmers Association in Mungka District, Fifty Cities Regency. This activity was motivated by the challenges faced by members of the association, who produce gambir soap, gambir tea, and catechins that are not yet free from tannins. Unfortunately, the gambir soap produced lacks market value, has unappealing packaging, and does not provide optimal benefits to users, leading to decreased buyer interest. Additionally, the liquid waste generated from gambir production has not been adequately managed or treated to be environmentally friendly. Prior to the implementation of activities at the partner location, preparations were made, including sampling wastewater as a model for treating gambir production wastewater, clarifying wastewater, and enhancing the process of making gambir-based soap in the chemistry analysis laboratory at the ATI Polytechnic in Padang. In this activity, we aimed to provide solutions by broadening the partners' understanding of the downstream processing of gambir products and waste. Three key issues were addressed: catechin isolation, the production of catechin-based beauty soap, and the treatment of liquid waste from gambir production. The downstream processing of gambir products into more commercially valuable items is expected to provide solutions, while the liquid waste can eventually be processed into clean water, with the residue being converted into fertilizer. The activity was attended by 40 members of the Gambir Farmers Association, as well as the village head of Talang Maur, local officials, and the association's management.

Pengaruh Variasi Prekursor Terhadap Morfologi dan Aktivitas Antibakteri Nanopartikel Tembaga Menggunakan Reduktor Ekstrak Daun Gambir Elisma, Netri; Emriadi , Emriadi; Darmawi, Ahmad
REACTOR: Journal of Research on Chemistry and Engineering Vol. 4 No. 2 (2023)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/

Research on synthesis copper nanoparticles has been carried out by the reduction method with a green synthesis approach using extracts of gambir leaves (Uncaria gambir Roxb). Gambir leaf extract contains polyphenol compounds uses as a natural reducing agent to reduce copper cation from variations of prekursor (CuSO45.H2O, Cu(NO3)2.3H2O and CuCl2.2H2O). The formation of copper nanoparticles (CuNP) colloid is visually shown by color change from light brown to dark brown. Absorption peak in UV-Vis spectrophotometer analysis at 405 -427 nm which is a specific wavelength of copper nanoparticles base on phenomenon of Surface Plasmon Resonance (SPR). The X-Ray Diffraction (XRD) analysis showed formation of CuNP with a face centered cubic (fcc) crystal structure. The result of Transmission Electron Microscope show the synthesized CuNP was spherical with particle size diameter 15nm for CuSO4 prekursor, 25 nm for Cu(NO3) prekursor and 28 nm for CuCl2 prekursor. The size of nanoparticles influenced of type prekursor anions. The antibacterial activity of the synthesized nanoparticles was also tested using pathogenic bacteria Escherichia coli and Staphylococcus aureus. The results showed that copper nanoparticles were promising antibacterial agents. Antibacterial activity test on copper nanoparticles were found to have higher antibacterial activity against Gram positive bacteria S. aureus than Gram negatif E. coli.

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