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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Journal of Education and Learning (EduLearn) Indonesian Journal of Cancer Chemoprevention The Journal of Pure and Applied Chemistry Research Biology, Medicine, & Natural Product Chemistry Journal of Community Based Environmental Engineering and Management Advances in Tropical Biodiversity and Environmental Sciences Jurnal Teknologi Informasi : Jurnal Keilmuan dan Aplikasi Bidang Teknik Informatika ASEAN Journal of Chemical Engineering REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Jurnal Teknologi Lingkungan Lahan Basah
Putranty Widha Nugraheni
Department Of Environmental Engineering, Faculty Of Engineering, Universitas Tanjungpura
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Veterinary Other

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Zeolite Effect on Solid Product Characteristics in Hydrothermal Treatment of Household Waste Lalak Tarbiyatun Nasyin Maleiva; Chandra Wahyu Purnomo; Putranty Widha Nugraheni; Eka Kusumawardhani; Leonardus Sandy Ade Putra
ASEAN Journal of Chemical Engineering Vol 23, No 1 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.77544

Abstract

The number of primary energy sources in Indonesia will run out quickly. Therefore, innovation is required to provide renewable energy sources (NRE) that accommodate the increasing energy necessities. Hydrothermal is the potential degradation process of plastic waste to generate NRE. This study aims to examine the effectiveness of the hydrothermal process in breaking down bulky raw materials and the role of zeolite as a catalyst to upgrade the quality of hydrochar as a novel solid fuel by evaluating the essential parameters through proximate and ultimate analysis.  The addition of zeolite in the hydrothermal process can increase the water content, ash content, and volatile matter and slightly decrease the calorific value and fixed carbon. The condition to obtain the best characteristics was temperature of 220 oC and the addition of 20 % zeolite.
The learners’ conceptual understanding: Literature review of vapor-pressure lowering and boiling-point elevation Rizki Nur Analita; Iriani Bakti; Putranty Widha Nugraheni; Ester Noviyanti
Journal of Education and Learning (EduLearn) Vol 17, No 4: November 2023
Publisher : Intelektual Pustaka Media Utama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/edulearn.v17i4.20805

Abstract

The learners’ conceptual understanding has become one of the leading research areas conducted by educational researchers. Both students and current educators should actively work to improve their understanding of alternative conceptions and deepen their conceptual knowledge. One of the essential concepts in chemistry learning is colligative properties. This research is a literature review that discusses vapor-pressure lowering and boiling-point elevation, parts of colligative properties concept. The method used a meta-analysis review that combined the results of multiple studies that required a systematic approach to research of the literature. A preferred reporting items for systematic reviews and meta-analysis or known as PRISMA process was used for study selection. The following literature review was summarized based on various studies from Indonesia, United States of America (USA), Turkey, and Greece. The aims of this review were to provide important details from several previous studies to help researchers obtain complete sources. The findings were also expected to provide the learner with the correct understanding of chemistry, especially in vapor-pressure lowering and boiling-point elevation concepts.
Zeolites Effects in Physical Characteristics of Low-Density Polyethylene (LDPE) and Polypropylene (PP) Pyrolysis into Liquid Fuel Elsa Meilia Mayora; Arifin Arifin; Putranty Widha Nugraheni
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 1 (2024): March 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i1.90-102

Abstract

The decline in the quality of waste management has generally started to occur since the prolonged economic crisis in Indonesia. Plastic waste includes inorganic waste, which is currently widely used by industry and households. Therefore, it is necessary to have an alternative recycling process, like converting plastic waste into liquid fuel. The research objective is to utilize LDPE plastic waste (Low-Density Polyethylene) and PP (Polypropylene)in liquid fuelutilizing pyrolysisto determine the effect of using a zeolite catalyst by comparing the results of the pyrolysis process. The investigation took place at the Wonosari landfill in Singkawang, where parameters such as density, viscosity, and color were examined. The pyrolysis results underwent consistency testing through the Mann-Whitney test. According to the study findings, the average physical parameter values for viscosity and density of LDPE pyrolysis liquid fuel were 0.302 cP, LDPE+catalyst was 0.114 cP, with densities of 767 kg/m3 and 737 kg/m3. For PP, the average viscosity was 2.812 cP, and PP+catalyst was 0.248 cP, with densities of 774 kg/m3 and 735 kg/m3. Samples of PP and LDPE with catalysts exhibited lower density values compared to those without catalysts.
PEMANFAATAN SAMPAH PLASTIK BERJENIS LOW DENSITY POLYETHYLENE (LDPE) SEBAGAI BAHAN PEMBUATAN PAVING BLOCK Joko Renaldi; Arifin Arifin; Putranty Widha Nugraheni
JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Vol 9, No 4 (2022): JeLAST Desember 2022
Publisher : JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jelast.v9i4.60333

Abstract

Sampah telah lama menjadi masalah di kota-kota besar, tidak hanya di Indonesia tetapi juga di dunia. Dari berbagai jenis sampah yang dibuang, yang paling banyak memberikan dampak negatif bagi lingkungan adalah sampah plastik. Jenis plastik yang digunakan adalah low density polyethylene (LDPE). Tujuan pemanfaatan limbah plastik LDPE pada penelitian ini adalah untuk mengetahui kualitas fisik paving block. Penggunaan plastik LDPE digunakan untuk mensubstitusi penggunaan semen karena dapat digunakan sebagai perekat tanpa mengurangi kualitas bata beton. Plastik dicuci dan dikeringkan terlebih dahulu kemudian dilebur dalam tungku, setelah semua plastik dicairkan kemudian dimasukkan ke dalam cetakan berukuran 6,5 cm x 9 sisi x 9 cm, dan dikeraskan selama 12 hari untuk mendapatkan hasil pengujian yang maksimal. Setelah 12 hari pengerasan, paving block tersebut diuji di Laboratorium Material dan Konstruksi. Kuat tekan paving block diperoleh sebesar 179,8 kg/cm2 atau setara dengan 17,9 MPa. Hal ini sesuai dengan standar SNI 03-0691-1996 dengan kualitas kategori B yang digunakan untuk tempat parkir.
Co-Authors Aini Sulastri Arie Srihardyastutie Arifin Arifin Bakti, Iriani Chandra Wahyu Purnomo Chanif Mahdi Chanif Mahdi Chanif Mahdi Dyah Ayu Oktavianie Ardhiana Pratama Elsa Meilia Mayora Ester Noviyanti Fitria Rahmawati Gunawan, Vincentius Abdi Indri Pontiani Joko Renaldi Jumiati Jumiati Kusumawardhani, Eka Lalak Tarbiyatun Nasyin Maleiva Putra, Leonardus Sandy Ade Rizki Nur Analita Rizki Purnaini Sasangka Prasetyawan Ulli Kadaria Yulisa Fitrianingsih Zainal Abidin Abidin Zukiaturrahmah, Anna