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All Journal Jurnal Riset Teknologi Pencegahan Pencemaran Industri JURNAL REKAYASA KIMIA & LINGKUNGAN Nemui Nyimah
Alia Badra Pitaloka, Alia Badra
Jurusan Teknik Kimia, Fakultas Teknik, Universitas Sultan Ageng Tirtayasa, Cilegon, Banten, 42435, Indonesia Departemen Teknik Kimia, Fakultas Teknik, Universitas Indonesia, Depok, 16424, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Other

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Green Synthesis of Silver Nanoparticles Using Caulerpa racemosa Extract as Bioreductor: Characterization and Antibacterial Activity Barleany, Dhena Ria; Selviroh, Selviroh; Saleh, Afiatta Ilhan; Pitaloka, Alia Badra; Gunawan, Akbar
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 2 (2025): Jurnal Rekayasa Kimia & Lingkungan (December, 2025) In Press
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i2.45873

Abstract

Silver nanoparticles (AgNPs) have attracted much attention due to their broad antimicrobial properties and have found many applications in various fields. In the current study, AgNPs were synthesized using an environmentally friendly method by utilizing Caulerpa racemosa extract as a bioreduction agent. This study aims to investigate the formation of AgNPs mediated by Caulerpa racemosa extract and to observe their antimicrobial capability. The concentration of silver nitrate (AgNO3) was varied to investigate its influence on the shape, size, and uniformity of the silver particles formed. The Fourier Transform Infra-red (FT-IR) test results revealed that Caulerpa racemosa extract has an (-OH) functional group that reduces Ag+ ions to Ag0, making it effective as a bioreductor for AgNPs synthesis. The shape and size of AgNPs were examined using Scanning Electron Microscope (SEM), and the results confirmed that increasing AgNO concentration from 5 to 20 mM produced larger and agglomerated particles. Additionally, AgNPs inhibitory effect on the growth of pathogenic Escherechia coli (gram-negative bacteria) was evaluated using the well diffusion method. The findings showed that AgNPs improved the antibacterial properties when incorporated into chitosan-based film solution. This indicates that AgNPs exhibit strong antibacterial activity against gram-negative bacteria and hold promises for use in bio-related applications, including food packaging and biomedical uses
The pH-electrodeposition-dependant of Iron Oxide Toward The Physicochemical Characteristics and Electrochemical Performance in Biorefractory Pollutant Degradation Kosimaningrum, Widya Ernayati; Heriyanto, Heri; Yulvianti, Meri; Pitaloka, Alia Badra; Najahtama, Muhammad Raja; Wibisana, Muhammad Aditya; Sutianingsih, Yulis
Jurnal Riset Teknologi Pencegahan Pencemaran Industri Vol. 14 No. 1 (2023): May
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Pencegahan Pencemaran Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21771/jrtppi.2023.v14.no1.p8-18

Abstract

Electrodeposition of the iron oxide (FexOy) nanoparticles on the graphite felt was prepared from a mixture of iron (II) and iron (III) precursor solution with various pHs (2, 7, and 10) by applying a constant current (galvanostatic) of 0.1 A for 30 minutes. Each resulting sample was coded GF/FexOy -2, GF/FexOy -7, and GF/FexOy -10, respectively. Graphite felt without modification, Raw-GF, was used as control. The mass of iron oxide (FexOy) deposited ranged from 0.02 to 0.03 grams. The product characterisation using a Scanning Electron Microscope (SEM) showed the distribution of 500 nm particles on the surface of the graphite felt for the GF/FexOy -2 sample. In comparison, the distribution of larger particles (1 – 2 μm) was observed in the samples of GF/FexOy -7 and GF/FexOy -10, respectively. Spectrum resulting from an X-ray Diffraction Spectroscopy (XRD) showed the formation of iron oxides (FexOy) such as magnetite (Fe3O4), haematite (Fe2O3), goethite (FeOOH), and lepidocrocite (FeO(OH)). Fourier Transform Infra-Red (FTIR) spectrum also confirmed the presence of Fe2O3 in the GF/FexOy -2 sample, Fe3O4 in the GF/FexOy -7 and GF/FexOy -10 samples, and FeOOH in all three samples. Applying the iron oxide modified graphite felt in the electro-Fenton approach process without aeration showed that it can degrade bio-refractory pollutants, such as methyl orange. The observed degradations of methyl orange were a decrease in the colour intensity up to 81.37% and a decrease in the COD up to 49.85%.
PENGEMBANGAN INOVASI PANGAN LOKAL PADA PEMBUATAN TEPUNG JAMUR TIRAM DI KELOMPOK TANI HUTAN MEKAR HASANAH LEBAK-BANTEN Agustina, Sri; Pitaloka, Alia Badra; Pramudita, Marta
Nemui Nyimah Vol. 1 No. 2 (2021): Nemui Nyimah
Publisher : FT Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/nm.v1i2.11

Abstract

Budi daya jamur tiram (Pleurotus ostreatus) merupakan salah satu usaha pangan pertanian di kabupaten Lebak, Banten yang dikembangkan oleh Kelompok Tani Hutan dibawah pembinaan Dinas Lingkungan Hidup dan Kehutanan Provinsi Banten. Salah satunya adalah Kelompok Tani Hutan Mekar Hasanah dari kampung Cihelang, Rangkasbitung, Lebak. Jamur tiram memiliki daya simpan yang cukup rendah karena mudah mengalami kerusakan setelah dipanen.Salah satu cara untuk memperpanjang umur simpan jamur tiram adalah melalui proses pengolahan menjadi produk pangan yang baru, seperti tepung serbaguna. Melalui kegiatan pengabdian kepada masyarakat ini, masyarakat Kelompok Tani Hutan Mekar Hasanah diberikan pengarahan mengenai cara pengolahan jamur tiram menjadi tepung. Tepung yang diperoleh melalui proses pengolahan jamur tiram ini dapat digunakan dalam berbagai macam jenis makanan olahan dan memiliki nilai gizi yang baik.
Co-Authors Gunawan, Akbar Heri Heriyanto Kosimaningrum, Widya Ernayati Marta Pramudita, Marta Meri Yulvianti Najahtama, Muhammad Raja Saleh, Afiatta Ilhan Selviroh, Selviroh Sri Agustina, Sri Sutianingsih, Yulis Wibisana, Muhammad Aditya