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All Journal Seminar Nasional Teknik Kimia Kejuangan KOVALEN: Jurnal Riset Kimia FLUIDA Fullerene Journal of Chemistry Kumawula: Jurnal Pengabdian Kepada Masyarakat International Journal of Applied Technology Research Industrial Research Workshop and National Seminar JC-T (Journal Cis-Trans) : Jurnal Kimia dan Terapannya
Yunus Tonapa Sarungu
Jurusan Teknik Kimia Politeknik Negeri Bandung
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Laju Korosi Logam Baja Karbon Rendah di Larutan Garam pada Berbagai Konsentrasi Inhibitor Korosi dari Ekstrak Daun Pepaya: Low Carbon Steel Metal Corrosion Rate in Salt Solution at Various Concentrations of Corrosion Inhibitor from Papaya Leaf Extract Ninik Lintang Edi Wahyuni; Rony Pasonang Sihombing; Nurcahyo; Agustinus Ngatin; Yunus Tonapa Sarungu; Alfiana Adhitasari; Bambang Soeswanto; Emma Hermawati Muhari; retno indarti
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 2 (2023): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i2.16344

Abstract

Papaya leaf extract could be used as an organic corrosion inhibitor. Corrosion inhibitors were used as a method to reduce corrosion rate. The most corrosive environment was the marine environment. The purpose of this study was to determine the best concentration of papaya (Carica papaya) leaf extract inhibitor which could reduce the corrosion rate of low carbon steel in a 3.56% NaCl solution environment. The maceration process was carried out for 24 hours with 70% ethanol solvent with a solute:solvent ratio of 1:8 (w/v) at room temperature. Inhibitor extracts were analyzed qualitatively with the phytochemical method. The addition of FeCl3 was carried out on the inhibitor extract from papaya leaves. The color change occurred from blackish brown to greenish black which indicated the presence of tannin compounds in the papaya leaf extract. Corrosion testing was carried out with hot stream temperature setting at 45⁰C to 55⁰C and concentrations of inhibitor extracts at 300, 600, and 900 ppm. The test was conducted for 36 hours with a span of metal mass every 6 hours. Corrosion rate calculation is done by weight loss method. The results showed that papaya leaf extract inhibitors positive contained corrosion inhibitor and could reduce the corrosion rate in 3.56% NaCl solution. The corrosion rate without inhibitor is 1.023 mmpy. Corrosion rates with inhibitor concentrations of 300, 600, and 900 ppm were 0.755, 0.585, and 0.438 mmpy, respectively.
Aplikasi Ekstrak Eceng Gondok dalam Korosi dengan Pelarut Metanol Rony Pasonang Sihombing; Putri Utami Dita Cahya; Nidaa’ Rihhadatul ‘Aisya Komara; Restu Adji Alif Asyari; Annisa Nurlatifah; Yunus Tonapa Sarungu
JC-T (Journal Cis-Trans) : Jurnal Kimia dan Terapannya Vol. 6 No. 2 (2022)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um0260v6i22022p001

Abstract

Water hyacinth contains antioxidants such as lignin, tannins, saponins, and alkaloids that can bind to metals to form a protective layer as an organic inhibitor in the corrosion proses. The purpose of this study was to determine the content of antioxidants in water hyacinth extract which can reduce the corrosion rate of metals. The maceration process was carried out with a feed: methanol ratio of 1:9 (w/v). The types of antioxidant compounds were tested using the phytochemical method while the antioxidant activity was tested using the FRAP method. Steel corrosion testing uses the coupon method with a corrosion time of 5 days in air, rainwater, and tap water. The yield of the extract was 72.80%. Based on the results of the phytochemical and FRAP tests, the positive extract contained antioxidant compounds, namely alkaloids, tannins and saponins with an antioxidant concentration of 296.55 ppm. Organic inhibitors that showed the highest inhibition efficiency were at a concentration of 75 ppm with a value of 94.52% in tap water media, 65.53% in air media, and 52.96% in rainwater media.
Pengolahan Air Limbah Industri Tekstil dengan Metoda Elektrokoagulasi Menggunakan Elektroda Besi (Fe) dan Aluminum (Al) Rony Pasonang Sihombing; Yunus Tonapa Sarungu
JC-T (Journal Cis-Trans) : Jurnal Kimia dan Terapannya Vol. 6 No. 2 (2022)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um0260v6i22022p011

Abstract

Textile industry wastewater contains organic and inorganic pollutants which could be indicated byrelatively high levels of COD, BOD5, turbidity. If this waste water was directly discharged into the environment, it would pollute the environment and endanger human health and other living things. Textile industry wastewater treatment with electrocoagulation method aimed to replace or save chemicals as coagulants and flocculants that could cause environmental pollution and the price continues to increase. Wastewater treatment with this method could produce wastewater or treatment effluent with levels of COD, turbidity, heavy metals, pH below or at least equal to the environmental quality standard (BML) Research results on textile wastewater treatment using Fe and Al and SS (Stainless) electrodes Steel) at a current density of 0.25 to 1.25 A/dm2 with a processing time of 35 minutes obtained COD levels with a process efficiency greater than 80% and turbidity levels with greater efficiency 90%. 
Co-Authors Alfiana Adhitasari Annisa Nurlatifah Annisa Nurlatifah Bambang Soeswanto Bambang Soeswanto Cut Magesang Hariyadi, Tri Jayanti, Retno Dwi Marlina, Ari Muhari, Emma Hermawati Ngatin, Agustinus Nidaa’ Rihhadatul ‘Aisya Komara Nidaa’ Rihhadatul ‘Aisya Komara Ninik Lintang Edi Wahyuni Nurcahyo Putri Utami Dita Cahya Putri Utami Dita Cahya Restu Adji Alif Asyari Restu Adji Alif Asyari Retno Indarti Rispiandi Rispiandi Robby Sudarman Rony Pasonang Sihombing Sihombing, Rony Pasonang Sudrajat Harris Abdulloh Suryadi, Joko Tri Reksa Saputra Unung Leoanggraini