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All Journal ORBITA: Jurnal Pendidikan dan Ilmu Fisika Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya
Arif Budianto
Program Studi Fisika, FMIPA, Universitas Mataram
Agriculture, Biological Sciences & Forestry Education Mathematics Physics Public Health Other

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Analisis Konsentrasi Particulate Matter (PM1) di Dalam Ruangan Berpendingin Udara Menggunakan Continuous Emission Monitoring (CEM) Arif Budianto; Eca Solehatin; Kasnawi Al Hadi
Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya Vol. 5 No. 3 (2025): Lambda : Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya
Publisher : Lembaga Bale Literasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58218/lambda.v5i3.1855

Abstract

Particulate Matter (PM?) is a micro-sized aerosol particle (
Rancangan Sistem Pengukuran Konsentrasi Emisi Gas Karbon Dioksida Berbasis IoT di Berbagai Area Sumber Emisi Udara Kasnawi Al Hadi; Arif Budianto; Ni Ketut Anggriani
Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya Vol. 5 No. 3 (2025): Lambda : Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya
Publisher : Lembaga Bale Literasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58218/lambda.v5i3.1856

Abstract

This study aims to design an IoT (internet of things)-based CO2 concentration measurement system and to identify environmental parameters that affect it. The measurement system was designed using an MG-811 sensor, internet network, and database as a transmitter station. The measurement system was calibrated to identify static measurement characteristics, such as accuracy, selectivity, measurement range-span, and response time. The system was installed in four emission sources: (a) rice fields that were actively burning agricultural waste; (b) landfills, (c) food courts, and (d) areas around the industry. Each area was connected to the receiver station for seven consecutive days. The calibration process shows good selectivity for CO2 gas, with a response of 1500 ppm). The difference in concentration was influenced by wind direction, air humidity, and emission factors. The results of the study concluded that the concentration measurement system can be developed into an IoT-based air quality monitoring system. CO2 concentration was influenced by environmental parameters, such as air humidity, wind direction, and type of emission source.
Characteristics of calcium derived from Pinctada maxima shells at different calcination temperatures as a candidate material for water quality control Susi Rahayu; Arif Budianto; Sri Anum; Hurnah Hurnah; Dian Wijaya Kurniawidi
ORBITA: Jurnal Pendidikan dan Ilmu Fisika Vol 12, No 1 (2026): May
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/orbita.v12i1.39276

Abstract

Pearl oyster (Pinctada maxima) aquaculture is a major economic activity in coastal regions of Indonesia, particularly in Lombok, West Nusa Tenggara, but generates substantial shell waste that remains underutilized. These shells are rich in biogenic calcium carbonate (CaCO₃), offering strong potential as a sustainable raw material for calcium oxide (CaO) production. This study investigates the effect of calcination temperature on the characteristics of calcium-based materials derived from P. maxima shells and evaluates their suitability as candidate materials for water quality control. Shell powders were calcined at 500 °C, 600 °C, and 700 °C for 5 h, producing samples labeled CC500, CC600, and CC700. The resulting materials were characterized through organoleptic analysis, acid–base titration, and X-ray diffraction (XRD) to assess physical properties, residual CaCO₃ content, crystalline phases, and microstructural parameters. The results showed that increasing calcination temperature significantly influenced material characteristics. CC700 exhibited a lighter color, finer and more homogeneous texture, and the lowest CaCO₃ content (68.74%), indicating more effective thermal decomposition. XRD analysis revealed dominant calcite phases in all samples, with decreasing aragonite intensity and reduced crystallinity (35.81%) at higher temperature, accompanied by increased crystal size and microstrain. These findings demonstrate that controlled calcination temperature is a critical factor governing CaCO₃ decomposition and structural evolution in P. maxima shell-derived materials. Calcination at approximately 700 °C represents an effective threshold for producing CaO with physicochemical characteristics favorable for water quality control applications in fisheries and aquaculture. The study provides baseline data supporting the sustainable valorization of pearl oyster shell waste within circular economy frameworks.
Co-Authors Dian Wijaya Kurniawidi Eca Solehatin Hurnah Hurnah Kasnawi Al Hadi Ni Ketut Anggriani Sri Anum Susi Rahayu