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Ekstrak Kafein sebagai Inhibitor Korosi Alami pada Logam Aluminium dalam Media Larutan Asam Sulfat dan Biosolar Marinda Sukmawanta, Shafara Najla; Wulan, Dyah Ratna; Widjajanti, Kristina; Azkiya, Noor Isnaini; Maryanty, Yanty
Jurnal Riset Kimia Vol 13, No 1 (2022): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i1.488

This research, the caffeine extract of arabica coffee beans, cacao beans, and black tea leaves will be tested as a corrosion inhibitor on aluminium in an acidic environment and in biodiesel containing acid. This condition resembles the metabolism of microorganisms in biodiesel which produces H2SO4 as one of the causes of corrosion. Arabica coffee, cacao beans and black tea are natural organic ingredients containing caffeine which can inhibit corrosion. In the maceration process used a variable ratio of 70% ethanol solvent with organic matter, namely 225 grams of organic matter with 450 grams of ethanol and 150 grams of organic matter with 450 grams of ethanol. Concentration of caffeine extract from arabika coffee, cacao beans, and black tea leaves was obtained based on HPLC analysis at an effluent rate of 0.8 mL/min. The corrosion inhibition efficiency test on aluminium was observed at 0, 1, 4, 7 and 10 days of immersion. The previously used aluminium has been corroded with 12% H2SO4. The corrosion inhibition efficiency test on aluminium was observed at 0, 1, 4, 7 and 10 days of immersion. The best inhibitor results on aluminium soaked in biosolar containing 12% H2SO4 is tea 1.234,313 ppm with a corrosion rate of 1.6x10-4 g/cm2 day on day 1 to 2.5x10-4 g/ cm2 day on day 10 with an inhibition efficiency of 99%. While the aluminium soaked in H2SO4 12% is tea containing caffeine of 684.373 ppm with a corrosion rate of 1.3 x10-4 g/ cm2 day on day 1 to 3.3x10-4 g/ cm2 day on day 10 with an inhibition efficiency of 64%. The longer the immersion time of aluminium in H2SO4 media with the addition of organic inhibitors, the lower the corrosion rate value because the inhibitors form a layer that protects the aluminium.

Ekstrak Kafein sebagai Inhibitor Korosi Alami pada Logam Aluminium dalam Media Larutan Asam Sulfat dan Biosolar Shafara Najla Marinda Sukmawanta; Dyah Ratna Wulan; Kristina Widjajanti; Noor Isnaini Azkiya; Yanty Maryanty
Jurnal Riset Kimia Vol. 13 No. 1 (2022): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i1.488

This research, the caffeine extract of arabica coffee beans, cacao beans, and black tea leaves will be tested as a corrosion inhibitor on aluminium in an acidic environment and in biodiesel containing acid. This condition resembles the metabolism of microorganisms in biodiesel which produces H2SO4 as one of the causes of corrosion. Arabica coffee, cacao beans and black tea are natural organic ingredients containing caffeine which can inhibit corrosion. In the maceration process used a variable ratio of 70% ethanol solvent with organic matter, namely 225 grams of organic matter with 450 grams of ethanol and 150 grams of organic matter with 450 grams of ethanol. Concentration of caffeine extract from arabika coffee, cacao beans, and black tea leaves was obtained based on HPLC analysis at an effluent rate of 0.8 mL/min. The corrosion inhibition efficiency test on aluminium was observed at 0, 1, 4, 7 and 10 days of immersion. The previously used aluminium has been corroded with 12% H2SO4. The corrosion inhibition efficiency test on aluminium was observed at 0, 1, 4, 7 and 10 days of immersion. The best inhibitor results on aluminium soaked in biosolar containing 12% H2SO4 is tea 1.234,313 ppm with a corrosion rate of 1.6x10-4 g/cm2 day on day 1 to 2.5x10-4 g/ cm2 day on day 10 with an inhibition efficiency of 99%. While the aluminium soaked in H2SO4 12% is tea containing caffeine of 684.373 ppm with a corrosion rate of 1.3 x10-4 g/ cm2 day on day 1 to 3.3x10-4 g/ cm2 day on day 10 with an inhibition efficiency of 64%. The longer the immersion time of aluminium in H2SO4 media with the addition of organic inhibitors, the lower the corrosion rate value because the inhibitors form a layer that protects the aluminium.

Synthesis of precipitated Calcium Carbonate (PCC) From Lime Rock Nature Methods Caustic Soda (Studies Concentration HNO3) Noor Isnaini Azkiya; Fanny Prasetia; Elsa Desyta Putri; Anggita Rosiana; Sri Wardhani
Jurnal ILMU DASAR Vol 17 No 1 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

The limestones was abundant in Tuban, East Java and have high calcium mineral content. Nevertheless, in the economic value, limestone have low price. Aim the research is prepare Precipitated Calcium Carbonate (PCC) by caustic soda method. In this method, calcium was dissolved in HNO3 with different concentration (2, 4,6, 8 M). The Filtrate obtained then was added by Na2CO3 1 M to get PCC. As the results, The white PCC obtained with the highest rendement is 64,7% when added HNO3 6M. Analysis of functional group by FTIR show that there were strong absorption in the 844,76; 912,27 dan 1411,40 cm-1 that indicated carbonate group. Analysis of Cristallinity by XRD show that there were the peak characteristic of 2 on 29,50˚; 36,07˚ dan 39,50˚that representative calcite structure. SEM-EDX Analysis show that PCC have a mixing structure of calcite and vaterite. Keywords: limestone, PCC, caustic soda

PELATIHAN PEMBUATAN HAND SANITIZER UNTUK MENINGKATKAN KETERAMPILAN BINAAN PANTI ASUHAN YAYASAN SITI FATIMAH PANDAAN Windi Zamrudy; Imron Rosyidi; Heny Dewajani; Noor Isnaini Azkiya
Jurnal Pengabdian Kepada Masyarakat (J-ABDIMAS) Vol 8 No 1 (2021): JURNAL PENGABDIAN KEPADA MASYARAKAT 2021
Publisher : Publisher UPT P2M Politeknik Negeri Malang

The Department of Chemical Engineering at the State Polytechnic of Malang in carrying out its function, namely carrying out the Tri Dharma of Higher Education is required to carry out community service through various forms of activity, for this reason, collaboration with the Siti Fatimah Pandaan Orphanage Foundation is carried out. The purpose of this PkM is to provide counseling and understanding of the program which is expected to be a provision for assistants to be independent and can improve students' skills. The PkM program at the Siti Fatimah Pandaan Orphanage Foundation was chosen by considering the efficiency and intensity of program implementation. Aspects of the problems that are resolved in this PkM Program are improving the ability, competence, and understanding of the target audience. This PkM activity consists of several activities, including: 1) Assistance in the manufacture of hand sanitizers, 2) Submission of materials for making hand sanitizers. The results of the PkM showed an increase in participants' knowledge and skills in making hand sanitizers. In addition, increasing understanding of the introduction and application of production management and marketing of hand sanitizers. Furthermore, several PkM achievements that have been achieved include: Articles published in national journals with ISSN, and publication of activities on social media

PELATIHAN PEMBUATAN HAND SANITIZER UNTUK MENINGKATKAN KETERAMPILAN BINAAN PANTI ASUHAN YAYASAN SITI FATIMAH PANDAAN Windi Zamrudy; Imron Rosyidi; Heny Dewajani; Noor Isnaini Azkiya
Jurnal Pengabdian kepada Masyarakat Vol. 8 No. 1 (2021): JURNAL PENGABDIAN KEPADA MASYARAKAT 2021
Publisher : P3M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jabdimas.v8i1.128

The Department of Chemical Engineering at the State Polytechnic of Malang in carrying out its function, namely carrying out the Tri Dharma of Higher Education is required to carry out community service through various forms of activity, for this reason, collaboration with the Siti Fatimah Pandaan Orphanage Foundation is carried out. The purpose of this PkM is to provide counseling and understanding of the program which is expected to be a provision for assistants to be independent and can improve students' skills. The PkM program at the Siti Fatimah Pandaan Orphanage Foundation was chosen by considering the efficiency and intensity of program implementation. Aspects of the problems that are resolved in this PkM Program are improving the ability, competence, and understanding of the target audience. This PkM activity consists of several activities, including: 1) Assistance in the manufacture of hand sanitizers, 2) Submission of materials for making hand sanitizers. The results of the PkM showed an increase in participants' knowledge and skills in making hand sanitizers. In addition, increasing understanding of the introduction and application of production management and marketing of hand sanitizers. Furthermore, several PkM achievements that have been achieved include: Articles published in national journals with ISSN, and publication of activities on social media

Utilization of Red Dragon Fruit (Hylocereus polyrhizus) Peel Waste as an Alternative Indicator for Acid - Base Titration Azkiya, Noor Isnaini; Sukmawanta, Shafara Najla Marinda; Lusiani, Cucuk Evi
Jurnal Teknik Kimia dan Lingkungan Vol. 9 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jtkl.v9i1.6169

Titration indicators are organic (generally) or inorganic compounds used in titrations to determine and indicate the end point of a titration. Indicators that are widely used in acid-base titrations are synthetic indicators such as phenolphthalein (PP), methyl red (MM), methyl orange (MO), and phenol red (MF). Apart from being relatively expensive, the use of these indicators also produces chemical waste which can pollute the environment. The solution to overcome this problem is to utilize natural ingredients as a substitute for synthetic indicators. The natural indicator used in this research was the peel of red dragon fruit (Hylocereus polyrhizus). Red dragon fruit peel contains flavonoid compounds, one of which is anthocyanin. Anthocyanins are polar so they can be dissolved in polar solvents such as ethanol. This research aims to determine the effect of the type of solvent and length of maceration time in anthocyanin extraction as an indicator for strong acid-strong base titration, and to determine the effect of storage time on the stability of red dragon fruit peel extract. In the maceration process, a variable ratio of solvent to red dragon fruit peel was used 1:5 (w/v). The solvents used were ethanol, methanol, and acetone acidified with 5 mL of HCl 1% (v/v). Identification of anthocyanin compounds was carried out using FT-IR and UV-Vis. In this study, the highest anthocyanin content was found in the acetone solvent 9x10-4 mg/100 g and the lowest was in the methanol solvent at 6x10-4 mg/100 g. Furthermore, the most similar application to a commercial titration indicator is the use of methanol and acetone solvents with a 24-hour extraction time.

Pengaruh ekstrak kafein sebagai inhibitor laju korosi dan efisiensi inhibisi pada baja dalam larutan asam sulfat dan biosolar Maryanty, Yanty; Ifvournamasari, Adinda Dwi; Widjajanti, Kristina; Wulan, Dyah Ratna; Azkiya, Noor Isnaini
Jurnal Rekayasa Proses Vol 17 No 1 (2023): Volume 17, Number 1, 2023
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.71831

Telah dilakukan penelitian tentang pengujian ekstrak kafein dari kopi arabika, coklat, dan daun teh hitam sebagai inhibitor laju korosi pada baja dalam lingkungan yang mengandung asam dan dalam biosolar yang mengandung asam. Penyimpanan biosolar B30 dalam tangki dalam waktu lama mengakibatkan penurunan pH, pembakaran tidak sempurna, dan korosi pada tangki penyimpanan yang diduga disebabkan oleh komposisi konsorsium bakteri. Pada penelitian sebelumnya hasil penelitian menunjukkan bahwa genus yang dominan merupakan bakteri penghasil asam yang diduga menjadi penyebab penurunan kadar pH biosolar B30 selama masa penyimpanan. Berdasarkan Analisa metagenomik pada biosolar B30 ditemukan genus Eubacteria merupakan bakteri penyebab korosi pada kondisi anaerob. Sehingga pada penelitian dibuat kondisi keasaaman yang dihasilkan oleh mikroorganisme dengan penambahan H2SO4 12%. Ekstrak kafein diperoleh dari proses maserasi dengan variabel perbandingan pelarut etanol 70% : bahan organik yaitu 1 : 2 dan 1 : 3. Uji ekstrak kafein dilakukan dengan metode HPLC pada laju effluent 0,8 mL/min. Sedangkan uji efisiensi inhibisi korosi pada baja diamati pada kurun waktu perendaman 0, 1, 4, 7 dan 10 hari. Baja yang digunakan sebelumnya telah dikorosikan dengan H2SO4 12%. Hasil inhibitor terbaik pada baja yang direndam H2SO4 12% didapatkan inhibitor terbaik yaitu kopi 2100,793 ppm dengan laju korosi sebesar 84,7x10-4 g/cm2 hari pada hari ke-1 menjadi 75,5x10-4 g/cm2 hari pada hari ke-10 dengan efisiensi inhibisi sebesar 80%. Sedangkan pada baja yang direndam biosolaryang mengandung H2SO4 12% didapatkan inhibitor terbaik yaitu kopi 2.100,793 ppm dengan laju korosi sebesar 0,3x10-4 g/cm2 hari pada hari ke-1 menjadi 0,2x10-4 g/cm2 hari pada hari ke-10 dengan efisiensi inhibisi sebesar 100%. Semakin lama waktu perendaman baja dalam media H2SO4 maupunbiosolar yang mengandung H2SO4 12% dengan penambahan inhibitor organik maka nilai laju korosi semakin rendah karena inhibitor membentuk lapisan yang melindungi baja.

Aplikasi Chitosan Modified Carboxymethyl sebagai Coating Agent dalam Perbaikan Mutu Kertas Hadiantoro, Sigit; Udjiana, S. Sigit; Azkiya, Noor Isnaini
Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020
Publisher : Politeknik Negeri Malang

This study aimed to determine the effect of coating paper with Modified Carboxymethyl Chitosan (Cs-Mcm) to improve the quality of the paper, including paper grammage, tensile strength of paper, torn paper and a strong degree of fineness of the paper. The study was conducted by superimposing the Cs-Mcm as a coating agent on a paper-based pulp rice straw pulp waste paper and pulp mixture (rice straw and waste paper) with various concentration of acetic acid solvent 2%, 3%, 5% and 7%. The analysis showed the concentration of acetic acid solvent effect on the quality of recycled paper. Coating with Cs-Mcm in this study can improve the quality of recycled paper.

Inovasi Insektisida Organik Berbahan Eco Enzyme Untuk Penguatan UMKM Pertanian – LPPNU Tani Sejahtera Wahyuni Ningsih; Noor Isnaini Azkiya; Anugrah Windy Mustikarini; Lintang Alivia Anggerta; Ariani; Zakijah Irfin
KOMUNITA: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 5 No 2 (2026): Mei
Publisher : PELITA NUSA TENGGARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60004/komunita.v5i2.353

Micro, Small, and Medium Enterprises (MSMEs) in the agricultural sector face challenges in implementing environmentally friendly and cost-effective pest control. The use of synthetic pesticides has negative impacts on health and the environment. This community service activity aims to enhance farmers’ knowledge and skills in producing organic insecticides made from eco-enzyme as an alternative to synthetic pesticides. The activity was carried out in three stages: preparation (equipment and materials setup, communication material design, and evaluation instrument development), implementation (socialization, demonstration, and hands-on practice), and post-implementation (evaluation and dissemination). The effectiveness was evaluated using pretest-posttest and participant satisfaction questionnaires. The results showed a significant increase of 150% in participants’ knowledge, from an average score of 26.67 to 66.67. The satisfaction questionnaire indicated that 84% of respondents gave positive feedback on the activity. The training program successfully improved MSMEs’ capacity in producing organic insecticides and provided an environmentally friendly alternative solution for pest control.

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