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Noor Isnaini Azkiya, Noor Isnaini
Jurusan Teknik Kimia, Politeknik Negeri Malang, Jawa Timur
Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Social Sciences Other

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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

Abstract

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

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.887 KB) | DOI: 10.19184/jid.v17i1.2670

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (601.486 KB) | DOI: 10.33795/jabdimas.v8i1.128

Abstract

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

Abstract

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
PEMANFAATAN AMPAS TAHU PADA PEMBUATAN BRIKET SEBAGAI BAHAN BAKAR ALTERNATIF Masitah, Nihayatul Devi; Azkiya, Noor Isnaini
DISTILAT: Jurnal Teknologi Separasi Vol. 10 No. 3 (2024): September 2024
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/distilat.v10i3.6248

Abstract

Kebutuhan energi semakin meningkat seiring bertambahnya waktu. Akan tetapi, hal ini tidak diimbangi dengan ketersediaan bahan bakar yang semakin berkurang sehingga perlu mencari alternatif bahan bakar yang dapat diperbarui (renewable), ramah lingkungan dan bernilai ekonomis. Salah satu jenis alternatif yang bisa dikembangkan yaitu energi biomassa seperti limbah sisa pengolahan pangan. Dalam penelitian ini limbah ampas tahu dimanfaatkan sebagai bahan bakar dengan mengubahnya menjadi briket arang. Penelitian ini bertujuan untuk mengetahui komposisi perekat terbaik pembuatan briket dari ampas tahu. Metode penelitian ini menggunakan pendekatan kuantitatif berdasarkan eksperimen di laboratorium. Variabel yang digunakan yaitu perbandingan massa perekat tepung tapioka dengan persentase 12, 14, dan 16% (w/w). Berdasarkan penelitian didapatkan kesimpulan hasil pengujian briket dengan 12% (w/w) persentase perekat mempunyai kualitas yang paling baik menghasilkan nilai kadar air sebesar 1,48%, nilai kadar abu sebesar 13%, nilai volatile matter sebesar 2,05%, nilai fixed carbon sebesar 83,46%, nilai kalor sebesar 5895 cal/gr, dan kuat tekan sebesar 2,29 kg/cm2 dibandingkan dengan variasi perekat lainnya.
PENGARUH PERBANDINGAN MASSA AMPAS TAHU DAN SEKAM PADI TERHADAP KARAKTERISTIK BRIKET Tsabitah, Amani Muflihah Tsabitah; Azkiya, Noor Isnaini
DISTILAT: Jurnal Teknologi Separasi Vol. 10 No. 4 (2024): December 2024
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/distilat.v10i4.6246

Abstract

Briket adalah bahan bakar padat yang berbentuk gumpalan-gumpalan arang yang terbuat dari biomassa (bahan lunak). Namun, biomassa tersebut perlu diolah terlebih dahulu agar menjadi bahan bakar yang memiliki kadar panas lebih tinggi dari arang biasa.  Selain itu, keunggulan briket adalah residu atau sisa hasil pembakaran yang lebih sedikit, asap yang dihasilkan lebih sedikit, ekonomis, dan tidak beracun. Dalam penelitian ini limbah dari ampas tahu dan sekam padi dimanfaatkan sebagai bahan bakar dengan cara mengubahnya menjadi briket. Penelitian ini bertujuan untuk mengetahui pengaruh perbandingan komposisi bahan baku dan persentase perekat tepung tapioka terhadap kualitas briket yang dihasilkan. Metode penelitian ini menggunakan penelitian kuantitatif berdasarkan eksperimen di laboratorium untuk mendapatkan data yang relevan. Variabel bebas yang digunakan yaitu perbandingan massa bahan baku sekam padi dan ampas tahu dengan perbandingan 25:75, 50:50, 75:25 (%b/b). Perekat yang digunakan yaitu tepung tapioka dengan persentase 10% (b/b). Tahapan pembuatan briket dimulai dengan persiapan bahan baku, proses pirolisis, pendinginan, penggilingan dan pengayakan, pencampuran bahan dengan perekat, pencetakan briket, pengovenan dan proses analisis berupa kadar air, kadar abu, vollatile matter, fixed carbon, nilai kalor, dan kuat tekan. Berdasarkan penelitian didapatkan kesimpulan hasil pengujian briket dengan komposisi 25% sekam padi:75% ampas tahu dan 10% persentase perekat mempunyai kualitas yang paling baik menghasilkan nilai kadar air sebesar 0,97284%, nilai kadar abu sebesar 17%, nilai volatille matter sebesar 1,12613%, nilai fixed carbon sebesar 80,9010%, nilai kalor sebesar 5478 kal/g, dan nilai kuat tekan sebesar 2,44375 kg/cm2.
EFEKTIFITAS KARBON AKTIF LIMBAH KULIT KACANG TERMODIFIKASI DENGAN METODE KOPRESIPITASI SEBAGAI ADSORBEN TEMBAGA DAN BESI PADA LIMBAH CAIR ELEKTROPLATING ARTIFICIAL Putri, Shabrina Adani; Hanavia, Millenina Sulung; Chrisnandari, Rosita Dwi; Ningsih, Wahyuni; Azkiya, Noor Isnaini
DISTILAT: Jurnal Teknologi Separasi Vol. 10 No. 4 (2024): December 2024
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/distilat.v10i4.6402

Abstract

Limbah dari elektroplating yang mengandung tembaga (Cu) dan besi (Fe) sangat beracun dan dapat menyebabkan gejala keracunan logam berat pada manusia jika masuk ke dalam organ pada konsentrasi yang cukup tinggi. Karbon aktif yang dimodifikasi dari limbah kulit kacang tanah dapat digunakan untuk mengatasi masalah limbah elektroplating melalui proses adsorpsi. Penelitian ini bertujuan untuk menganalisis efektivitas karbon aktif dari limbah kulit kacang yang dimodifikasi menggunakan metode kopresipitasi sebagai adsorben logam Cu dan Fe dalam limbah elektroplating artificial, dengan variasi massa karbon aktif dan waktu kontak adsorpsi. Pirolisis pada suhu 350 °C dilakukan selama 120 menit, kemudian diikuti dengan proses aktivasi selama 2 jam menggunakan NaOH 20% untuk menghasilkan arang aktif. Kopresipitasi dalam larutan garam besi 90°C dilakukan untuk memodifikasi karbon aktif. Kualitas karbon aktif untuk mengurangi logam berat dalam limbah elektroplating buatan ditentukan oleh variasi massa karbon aktif yang dimodifikasi sebesar 5%, 10%, dan 15% b/v dan durasi waktu kontak selama 30, 60, 90 menit. Hasil menunjukkan bahwa penurunan kadar logam berat Cu dalam limbah Cu adalah 94,51%, kadar logam Fe dalam limbah Fe adalah 83,52%, dan kadar logam Cu dalam campuran limbah Cu Fe adalah 92,67%, menurut pemeriksaan kapasitas absorpsi.
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

Abstract

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

Abstract

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.
Co-Authors Anggita Rosiana Chrisnandari, Rosita Dwi Dyah Ratna Wulan Dyah Ratna Wulan Elsa Desyta Putri Fanny Prasetia Fanny Prasetia Hanavia, Millenina Sulung Heny Dewajani Ifvournamasari, Adinda Dwi Ilafi, Athika Ayu Kautsar Imron Rosyidi Lusiani, Cucuk Evi Marinda Sukmawanta, Shafara Najla Masitah, Nihayatul Devi Muhammad Rivai Nadua Bella Wardani Ningsih, Wahyuni Rosita Dwi Chrisnandari S. Sigit Udjiana Shabrina Adani Putri, Shabrina Adani Shafara Najla Marinda Sukmawanta Sigit Hadiantoro, Sigit Sri Wardhani Sukmawanta, Shafara Najla Marinda Taufiqi, Rohmad Tsabitah, Amani Muflihah Tsabitah Udjiana, S. Sigit Wianthi Septia Witasari Widjajanti, Kristina Windi Zamrudy Windi Zamrudy Yanty Maryanty, Yanty