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ASIYAH NURRAHMAJANTI
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Optimalisasi Prototipe Alat Pengolahan Limbah Cair Ikm Batik Menggunakan Elektrokoagulan OCTIANNE DJAMALUDIN; EKA OKTARIANI; LESTARI WARDANI; WITRI AINI SALIS; ANDRIAN WIJAYONO; ASIYAH NURRAHMAJANTI; ANDRI SAPUTRA; RAFLI S BATUBARA; AZKIA AULIA
Gunung Djati Conference Series Vol. 34 (2023): Prosiding Seminar Nasional Kimia Tahun 2023
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

IKM batik merupakan salah satu industri yang terus berkembang di Indonesia. Hal tersebut menguntungkan bagi perekonomian daerah. Namun potensi dampak lingkungan dari IKM batik ini masih belum ditangani dengan baik sehingga pencemaran air tidak dapat dihindari. Zat warna yang merupakan polutan dominan pada limbah cair batik umumnya bersifat nonbiodegradable sehingga sukar terurai secara alamiah di perairan. Salah satu cara yang dilakukan untuk mengolah limbah ialah dengan metode elektrokoagulasi. Elektrokoagulasi adalah proses pengolahan air dimana arus listrik diterapkan di elektroda untuk menghilangkan berbagai kontaminan air. Keunggulan dari metode ini ialah pada proses pengolahannya tidak membutuhkan penambahan zat kimia, peralatannya sederhana, mudah dalam pengoperasian dan waktu reaksi singkat. Pada penelitian ini alat elektrokoagulasi diaplikasikan pada limbah IKM batik Jawa Barat. Limbah IKM batik ini diolah dengan alat elektrokoagulasi yang bersumber dari energi listrik menggunakan elektroda logam Aluminium. Dilakukan variasi tegangan 3, 6, 9 dan 12 volt pada generator alat elektrokoagulasi yang digunakan dengan variasi waktu kontak 10,15,20,25 dan 30 menit. Pada reaktor elektrokoagulasi, ditambahkan fitur scraper dengan tujuan membantu mengatasi busa produk samping yang diperoleh selama pengolahan limbah batik IKM Jawa Barat. Dari variasi tegangan yang diaplikasikan,12 volt adalah tegangan optimum yang dapat menurunkan nilai COD sebesar 97,20% dan penurunan warna sebesar 80,14%.
APPLICATION OF HEMATITE SYNTHESIZED FROM IRON RUST WASTE AS A PIGMENT DYES FOR COTTON TEXTILE PRINTING Asiyah Nurrahmajanti; Octianne Djamaludin; Wulan Safrihatini Atikah
Indonesian Journal of Chemistry and Environment Vol. 9 No. 1 (2026): JUNE 2026
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijoce.v9i1.97711

Abstract

Iron rust is an abundant waste material with potential to be utilized as an iron oxide pigment. While previous studies have focused on its synthesis, its application in textile printing remains limited. This study evaluates the performance of hematite (Fe₂O₃) derived from iron rust waste as a pigment for cotton fabric printing. The pigment was incorporated into a conventional printing formulation and applied onto cotton fabric. Color strength (K/S), CIELAB properties, and fastness to washing and rubbing were evaluated with five replicates to ensure data reliability. The results show a slight increase in K/S from 1.13 ± 0.09 to 1.22 ± 0.10 with increasing synthesis concentration, although the difference remains moderate. The printed fabrics exhibited consistent reddish-yellow hues and low variability in colorimetric values, indicating good reproducibility. Washing fastness was acceptable (grade 3 for color change; 4–5 for staining), while rubbing fastness ranged from 2–4. These findings demonstrate that rust-derived hematite is applicable as a pigment in textile printing. However, performance is influenced by pigment–binder interaction, indicating the need for further optimization to improve color strength and durability.
Pengaruh Variasi Konsentrasi Asam dan Variasi Pengendap pada Sintesis Besi Oksida dari Limbah Karat Besi Asiyah Nurrahmajanti; Anisya Lisdiana
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 4 (2025): Agustus 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i4.6145

Abstract

Iron commodities are one of the very important commodities and are used in various sectors. The supply of iron and its derivatives has so far relied solely on mining results. However, the impact of mining results can be detrimental from geological, environmental, and health perspectives. One potential that is often overlooked is iron rust waste. The synthesis of iron oxide pigments from iron rust waste can be done using the precipitation method with variations of 1M and 4M HCl concentration and variations of the precipitant NH4OH 4M and NaOH 4M. The synthesized iron oxide shows red solids for the NaOH precipitant variation and blackish-red for the NH4OH precipitant. EDS results indicate that the NH4OH precipitant generates purer iron oxide pigments compared to NaOH. In the SEM testing, it was observed that iron oxide was successfully synthesized with a crystalline phase, namely the formation of rhombohedral crystals in the HEM2 and HEM4 variation, as evidenced by XRD testing showing 11 peaks at 2θ(º) 24.2; 33.3; 35.6; 41; 49.6; 54.2; 57.7; 62.5; 64.1; 69.7; and 72.1 compared to JCPDS 33-0664.
Co-Authors ANDRI SAPUTRA Anisya Lisdiana AZKIA AULIA Eka Oktariani Lestari Wardani Octianne Djamaludin RAFLI S BATUBARA Wijayono, Andrian WITRI AINI SALIS Wulan Safrihatini Atikah