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Rahmat Hidayat
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Material MOFs (Metal Organic Frameworks) dalam Aplikasi Fotokatalisis: Mini Review Rahmat Hidayat; Anggi Saputra; Murni Fitria
Indonesian Journal of Chemical Analysis (IJCA) Vol. 5 No. 2 (2022): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol5.iss2.art7

Abstract

MOFs (Metal Organic Frameworks) telah banyak dilaporkan berhasil diaplikasikan dalam berbagai bidang salah satunya fotokatalitik. MOFs tersusun dari ion logam atau cluster oksida logam, senyawa penghubung organik (linker), serta senyawa lain sebagai senyawa tamu (guest) yang memberikan banyak keunggulan jika digunakan sebagai material fotokatalis. Kemampuan menyerap foton dari cahaya serta porositas yang baik menyebabkan MOFs menarik untuk diaplikasikan sebagai fotokatalis. Kestabilan sifat kimia yang kurang baik dan tidak begitu sensitif terhadap sinar tampak menjadi pokok persoalan yang membuat MOFs masih mengalami banyak perkembangan. Berbagai metode dilakukan dengan memodifikasi ion logam, linker, maupun pada senyawa tamu untuk mendapatkan material MOFs dengan kestabilan sifat kimia yang baik, peningkatan luas area permukaan, dan mampu menyerap banyak sinar pada daerah tampak.
Analisis Protein Gen LCYB pada Mikroalga Laut Phaeodactylum tricornutum menggunakan Pendekatan Bioinformatika Murni Fitria; Anggi Saputra; Rahmat Hidayat; Niken Feladita
Indonesian Journal of Chemical Analysis (IJCA) Vol. 5 No. 2 (2022): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol5.iss2.art8

Abstract

LCYB merupakan gen yang memproduksi enzim Lycopene Beta Cyclase. Enzim Lycopene Beta Cyclase beperan dalam mengubah likopen menjadi ß-karoten. Gen LCYB terdapat pada diatom maupun mikroalga hijau. Berbeda dengan mikroalga hijau, penelitian mengenai struktur protein Lycopene Beta Cyclase selaku produk gen LCYB pada diatom masih minim publikasi. Dalam penelitian ini dilakukan prediksi struktur produk gen LCYB pada diatom P. tricornutum secara bioinformatika. Untuk menganalisis perbedaan produk gen LCYB pada diatom dan mikroalga hijau, produk gen LCYB pada diatom P. tricornutum dibandingkan dengan produk gen LCYB pada mikroalga hijau M. zofingiensis. Konstruksi pohon filogenetik dilakukan menggunakan perangkat lunak MEGA7. Analisis gen LCYB dan struktur produk gen LCYB dilakukan menggunakan beberapa perangkat bioinformatika. Analisis docking dilakukan untuk memperkuat prediksi adanya interaksi antara produk gen LCYB hasil prediksi dengan ligannya menggunakan AutoDocksTools-1.5.6. M. zofingiensis memiliki hubungan kekerabatan yang jauh dengan P. Tricornutum sehingga kemiripan gen dan produk gen LCYB hasil prediksi juga jauh berbeda. Mikroalga hijau M. zofingiensis mengandung protein transmembran yang tidak dimiliki pada diatom P. Tricornutum. Hasil docking menunjukkan adanya interaksi antara produk gen LCYB hasil prediksi dengan ligannya yaitu likopen.
EFFECTIVENESS OF ACTIVATED BAMBOO CHARCOAL TO REDUCE TSS AND NEUTRALIZE PH OF WASTE WATER IN KOLAM PENGENDAPAN LUMPUR (KPL) OF PT. BUKIT ASAM PELABUHAN TARAHAN LAMPUNG Oktaf Rina; Yatim Rahayu Widodo; Murni Fitria; Anggi Saputra; Rahmat Hidayat; Ajis Purnomo; Taty Silvia; Aang Haryadi; Syahdilla Anggiva Akhni
Jurnal Inovasi Penelitian Vol 3 No 8: Januari 2023
Publisher : Sekolah Tinggi Pariwisata Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47492/jip.v3i8.2420

Abstract

Water Treatment at PT Bukit Asam Pelabuhan Tarahan Lampung has carried out a waste treatment process in the Kolam Pengendapan Lumpur (KPL) which aims to purify or neutralize contaminated raw water into water that is categorized as clean according to quality standards. Bamboo charcoal was composed of carbon atoms which are known to have a high active surface area where it will increase along with the activation process. Activation of carbon can also be done by a combination of chemical and physical methods. In this study, the sorption capacity of activated bamboo charcoal was tested. ABT activity test on waste was carried out by batch method. In this method, ABT was put into an erlenmeyer flask containing liquid waste with a ratio of 1:50 (w/v). The mixture was then homogenized with a shaker at 150 rpm with a variation of soaking time of 10, 20, 30, 40, 50, and 60 minutes. The results concluded that the use of activated bamboo charcoal can reduce TSS to 15 mg/L and pH to 7.5. The use of activated bamboo charcoal can be recommended as a replacement component for alum in sewage treatment
Glass tube-coated TiO2 nanostructure for degradation of methylene blue: an experimental and design of column photocatalytic reactor Rahmat Hidayat; Ganjar Fadillah; Shin-Ichi Ohira
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 1 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss1.art6

Abstract

This work presents the successfully of TiO2 nanostructure synthesis using manual grinding combined hydrothermal method for photocatalyst. XRD confirmed that TiO2 was arranged by anatase and rutile phase with crystal size of 18.54 nm. Characterization of digital microscope shows the spread of catalyst on the glass tube surface, which can be observed furthermore using interactive 3D surface plot. Band gap energy determination from UV-Vis spectroscopy scanning shows the minimum energy that is required to facilitate electron-hole generated. In 20 min of irradiation, TiO2 existence can completely decompose MB (100%) that can be presented by TiO2 absence. Degradation of MB is higher effective in acidic condition which optimum pH of 5. Using first order reaction, glass tube-coated TiO2 has rate constant of 0.2102 min-1, 1.5 times faster than bare glass tube. This enhancement proves that the designed reactor has good prospect for organic pollutant treatment. Moreover, compared with other reported study, this system provides relatively more effective of MB photodegradation.
Quality Analysis of Cloth Masks: Study of Material Types on Physical, Chemical, and Antibacterial Properties Sayekti Wahyuningsih; Ari Handono Ramelan; Selfi Handayani; Nanang Wiyono; Sentot Budi Rahardjo; Agus Supriyanto; Windy Ayu Lestari; Retno Hartati; Rahmat Hidayat
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 2 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss2.art3

Abstract

Utilizing personal protective equipment (PPE) is the important requirement for controlling and preventing of Covid-19 virus spread. The awareness of mask-wearing among the citizen and the development of fabric mask testing methods based on Indonesian Standards through the implementation of SNI 7648: Textile – Test of the air permeability on fabric; SNI 20743: The evaluating method of antibacterial properties using biological aerosol S. aureus and E. coli; SNI/ISO 4920: The surface wetness testing. This study shows that we need to understand and choose fabric masks correctlybesides being standardized. Fabric types influence the performance of the mask while protecting the user.
Synthesis of Bamboo-based Activated Carbon through Physico-chemical Activation for Coal-runoff Wastewater Treatment Anggi Saputra; Oktaf Rina; Rahmat Hidayat; Murni Fitria; Syahdilla Anggiva Akhni; Ajis Purnomo; Aang Haryadi
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 2 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss2.art6

Abstract

Bamboo-based activated carbon (BAC) has been successfully synthesized through a physico-chemical technique. The characteristics of BAC were investigated using Scanning Electron Microscopy (SEM), Fourier Transform Infra-Red (FTIR), and X-Ray Diffraction (XRD). Evaluating BAC performance on coal-runoff wastewater was carried out by varying contact times and adding low-level alum on remediation of pH and Total Suspended Solid (TSS). The results confirm that BAC performs well in stabilizing pH, indicated by the neutral pH, after 10 minutes of interaction. The TSS with BAC treatment and 1% BAC-Alum combination reduced the TSS value from 880 mg/L to levels below the threshold for wastewater quality standards, 387 mg/L and 73 mg/L, respectively. This combination can be an alternative coal-runoff wastewater treatment technique for better environmental quality.
Pengembangan Briket Sekam Padi untuk Pemberdayaan Petani Desa Ogan Jaya, Lampung Utara Hidayat, Rahmat; Saputra, Anggi; Fitria, Murni; Feladita, Niken
Jurnal Nusantara Mengabdi Vol. 5 No. 1 (2025): Oktober
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jnm.v5i1.5717

Abstract

Purpose: This program aims to empower farmer groups to utilize rice husk waste into alternative fuel through simple briquette-making technology based on the circular economy concept. Methodology/approach: The program employed a participatory approach, involving local communities through several stages, including socialization, environmental education, and technical training on briquette production. The training covered rice husk carbonization, binder preparation, briquette molding, and drying processes. Evaluation was carried out through participant involvement observation, pre-test and post-test assessments, and product quality trials. Results/findings: The results show a significant increase in community knowledge, with over 39% improvement between pre-test and post-test scores. Participants, particularly farmer group members, showed high enthusiasm throughout the activities, and more than 75% successfully produced briquettes independently. A simple briquette press tool was also handed over to the community and proven to be functional and easy to operate. Conclusions: The program effectively enhanced community skills and awareness in renewable energy utilization. Simple technology can convert agricultural waste into economic value while supporting environmental sustainability. Limitations: The short implementation period restricted long-term mentoring and evaluation of sustainability. The number of participants was limited to 15 farmers, reducing generalizability. Moreover, no detailed economic or environmental assessments were conducted, so efficiency and emission impacts remain unquantified. Contribution: This program enhances community capacity in utilizing rice husk waste through simple briquette-making technology. It promotes renewable energy awareness, supports the circular economy, and strengthens collaboration between universities and farmer groups as a replicable model for rural energy innovation.
Co-Authors Aang Haryadi Aang Haryadi Agus Supriyanto Ajis Purnomo Ajis Purnomo anggi saputra Anggi Saputra Ari Handono Ramelan Feladita, Niken Fitria, Murni Ganjar Fadillah Murni Fitria Nanang Wiyono Niken Feladita Oktaf Rina Retno Hartati Sayekti Wahyuningsih Selfi Handayani Sentot Budi Rahardjo Shin-Ichi Ohira Syahdilla Anggiva Akhni Syahdilla Anggiva Akhni Taty Silvia Windy Ayu Lestari Yatim Rahayu Widodo