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All Journal Dekave : Jurnal Desain Komunikasi Visual Jurnal Pendidikan Kimia Universitas Riau Prosiding Seminar Nasional Teknoka Jurnal Rekayasa Material, Manufaktur & Energi Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Mitra Akademia: Jurnal Pengabdian Masyarakat Journal Of Research and Education Chemistry (JREC) JURNAL POLI-TEKNOLOGI Jurnal Teknologi Pangan dan Industri Perkebunan
Emmidia Djonaedi
Politeknik Negeri Jakarta
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Pemanfaatan Sabut Kelapa Sebagai Bahan Dasar Tinta Batik Hitam Melalui Proses Pirolisis Hapsari, Putri Uniqa Hapsari; Kusumantoro, HB. Rudi; Djonaedi, Emmidia
Jurnal Pendidikan Kimia Universitas Riau Vol. 10 No. 2 (2025): Juli: Jurnal Pendidikan Kimia Universitas Riau
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Riau

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Abstract

Batik is a world-recognized cultural heritage of Indonesia, but the batik industry still relies on synthetic dyes that pollute the environment, especially water pollution. This study aims to develop natural black batik ink from coconut fibre through pyrolysis and analyse its colour density. The process is carried out by heating coconut fibre at 150-250°C to produce charcoal, which is then pulverized into pigments. The pigments were mixed with distilled water (variation of 1-7 g pigment and 6-12 mL distilled water) and tested for density using a spectrodensitometer. The results showed that the formulation of 6 grams of pigment and 11 mL of distilled water produced the highest concentration (2.68). The average concentration of all samples reached 2.57, indicating the consistency of pigment quality. This study proves that the ratio of pigment and solvent affects colour density, while providing an environmentally friendly solution by utilizing coconut fibre waste as a natural dye with economic value.
UJI EFEKTIVITAS METODE PEMBUATAN BIOKERAMIK CANGKANG TELUR MENGGUNAKAN SODIUM ALGINAT DAN PATI JAGUNG Khalyla Hafsa Khairunnisa; Mustofa Kamal, Dianta; Djonaedi, Emmidia
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).20065

Abstract

The utilization of eggshell waste in Indonesia is still very low, which is only around 7-8% of the total waste of 611,790 tons per year, although the calcium carbonate content has the potential to be used as a raw material for bioceramics. Suboptimal utilization risks polluting the environment. This study aims to develop the utilization of eggshell waste into bioceramics by comparing the effectiveness of two types of binders, namely sodium alginate and corn starch. The manufacturing method includes the process of powdering eggshells, mixing with binders, molding, and drying. Evaluation is carried out through density testing, water absorption, and degradation tests in water. The results showed that bioceramics with corn starch had a higher density (2.05 g/m³), lower water absorption (34.5%), and neutral pH of the degradation water (pH 7), compared to sodium alginate which had a lower density and higher absorption (50.5%) with pH 8. These findings indicate that corn starch is superior in forming stable and solid bioceramics, so it has the potential to be applied in environmentally friendly craft products and supports the reduction of organic waste in the community.
Co-Authors Chia-Fen Chi, Chia-Fen Delila Mediana Dini Handayani Dini Handayani, Dini Diyah Ayu Dwi Agnes Natalia Bangun Endang Yuniarti Endang Yuniarti Endang Yuniatri Fauzia Dianawati, Fauzia Gunawan, Muhammad Budi Hapsari, Putri Uniqa Hapsari HB Rudi Kusumantoro HB. Rudi Kusumantoro Khalyla Hafsa Khalyla Hafsa Khairunnisa Kusumantoro, HB Rudi Kusumantoro, HB. Rudi Moch Yana Hardiman Mustofa Kamal, Dianta Nabila Putri Azzahra Nisrina Zahrah, Firyal Rachmah Nanda Kartika Rachmah Nanda Kartika Rachmah Nanda Kartika Rudi Kusumantoro, Heribertus Salsabila, Salsabila T. Yuri Zagloel, T. Vika Rizkia Yoga Putra Pratama Yoga Putra Pratama Zahira Adni Shaffa, Ghaitsa