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Thahirah Arief
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Journal of Green Chemical and Environmental Engineering
Published by Candela Edutech Indonesia
ISSN : -     EISSN : 30902568     DOI : https://doi.org/10.63288/jgcee.v1i1.1
Core Subject : Science, Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Environmental Science Materials Science & Nanotechnology
Aim and Scope : ✅ Green Chemical Processes ✅ Renewable Energy Technologies ✅ Waste Management and Valorization ✅ Pollution Control and Mitigation ✅ Sustainable Materials ✅ Sustainable Process ✅ Food Chemistry ✅ Environmental Risk Assessment ✅ Cleaner Production and Industrial Ecology ✅ Water and Wastewater Treatment ✅ Climate Change Mitigation ✅ Environmental Chemistry ✅ Biochemistry and Biotechnology ✅ Education in Chemistry
Arjuna Subject : Teknik Kimia (semua kategori) - Kimia Proses dan Teknologi
Articles 25 Documents
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Determination of Air Pollution Concentrations from Motor Vehicles at Selected Stop-Points Along a Major Highway Raji, Wuraola Abake; Lukuman Jimoda; Ayobami Ajani; Popoola, Adewemimo; Sunday Adebanjo
Journal of Green Chemical and Environmental Engineering Vol. 2 No. 1 (2026): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v2i1.22

Abstract

Intensified traffic-related air pollution along major highway corridors in developing countries poses increasing risks to environmental quality and public health. This study investigated air pollutant concentrations from motor vehicles at selected stop-points (Locations A - D) along the Benin–Ore–Sagamu highway in southwestern Nigeria. Continuous monitoring was conducted for gaseous pollutants (CO, CO₂, SO₂), particulate matter (PM2.5 and PM10), inorganic ions (SO₄²⁻ and NO₃⁻), and trace metals across four locations during wet and dry seasons. Traffic density was assessed through structured manual vehicle counts at each location, with vehicles categorized by type to assess traffic density and flow patterns. Traffic volume assessment identified Location D as the highest traffic hub, with seasonal variations influencing pollutant levels. Measured levels of CO, SO₂, PM2.5, and PM10  showed significant exceedances of WHO, NAAQS, and FMEnv guidelines, while trace metal analysis indicated extreme enrichment of Rh, Pt, Pd, and other metals, predominantly from vehicular emissions. In contrast, Fe, Zn, and Mn were predominantly derived from natural sources. Sulphate and nitrate exhibited strong dry-season correlations (r = 0.991, p < 0.01) and significant spatial variability, with ANOVA confirming the influence of location on concentrations. Wet-season deposition reduced pollutant concentrations, demonstrating the mitigating role of rainfall. The findings provide a seasonally resolved characterization of traffic-induced air pollution and emphasize the urgent need for regulatory enforcement, fuel quality improvement, and traffic management to protect public health along high-density highway corridors.
Technical Assessment and Optimization of Off-Gas Cooling in Nickel Matte Pyrometallurgy Based on Carbon Variation Badaruddin, Sabrianah; Alif Nur Laili Rachmah; Taipabu, Muhammad Ikhsan; Farida Diyah Hapsari; Esther Muatiara Santallum Ekklesia Tibalia
Journal of Green Chemical and Environmental Engineering Vol. 2 No. 1 (2026): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v2i1.21

Abstract

Exhaust gas emission management is a critical aspect of pyrometallurgical nickel smelting because it directly affects energy efficiency, operational safety, and overall process sustainability. This study investigates the influence of calcine carbon content on exhaust gas formation and determines the required cooling air volume in an industrial electric furnace operating at approximately 150 tons per hour. The research is based on deterministic mass and energy balance modelling developed from actual operational data obtained from a nickel smelting facility. The analysis quantifies the relationship between carbon oxidation reactions and off-gas generation during the smelting process. Results reveal a strong linear correlation between increasing calcine carbon content and exhaust gas volume. At an average carbon content of 1.96 %, the furnace produces 47,241 Nm³/h of exhaust gas. Under these operating conditions, a cooling air injection of 9,292 Nm³/h is required to reduce the gas temperature from 1000 °C to 800 °C in order to maintain safe furnace operation. The findings demonstrate that precise control of calcine carbon content and optimised cooling air design are essential for improving operational safety and efficiency in nickel smelting. The developed model provides a quantitative basis for designing safer and more efficient industrial off-gas control systems.
Method Verification of Carbon and Sulfur Determination in Ferronickel Tapping Samples Using HCS-801 in Accordance with GB/T 20123 Muh. Azis Albar. J; Muhammad Mattana Anwar; Ardiansah, Ardiansah; Mahardika Sandy Ponco; Alexander Malau
Journal of Green Chemical and Environmental Engineering Vol. 2 No. 1 (2026): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v2i1.24

Abstract

Reliable determination of carbon (C) and sulfur (S) in tapping ferronickel is critical for metallurgical quality control and compliance with industrial specifications. Given the complex metallic matrix of ferronickel, verification of analytical performance is essential before routine application. This study verifies the GB/T 20123 standard method for the simultaneous determination of carbon and sulfur in tapping ferronickel using a High Carbon Sulfur (HCS-801) combustion–infrared analyzer. Method performance was assessed using accuracy, precision (repeatability), linearity, limit of detection (LOD), and limit of quantification (LOQ), in accordance with internationally accepted validation principles. Evaluation of recovery testing yielded 97.82 % for carbon and 99.04 % for sulfur, both within acceptable recovery ranges. Precision expressed as %RSD was 1.27% for carbon and 0.70% for sulfur, complying with the Horwitz criterion (% RSD < ½ CV Horwitz) and the general acceptance limit of 2 %. Excellent linearity was obtained across the calibration range, with correlation coefficients (r) of 0.998 for carbon and 0.9984 for sulfur. LOD and LOQ values, calculated based on the standard deviation of response and slope of calibration curves, were 0.0557% and 0.1855% for carbon, and 0.0123 % and 0.0409 % for sulfur, respectively. The results demonstrate that the GB/T 20123 method, when implemented with the HCS-801 analyzer, provides reliable analytical performance for carbon and sulfur determination in tapped ferronickel and is suitable for routine industrial applications.
Polymer Membranes for Energy-Efficient Separation and Clean Energy Applications: Materials Design, Performance Trade-Offs, and Future Perspectives Muhammad Yelwa, Jibrin; Aliyu, Auwal Jaji
Journal of Green Chemical and Environmental Engineering Vol. 2 No. 1 (2026): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v2i1.25

Abstract

The low energy requirement, modularity, operational flexibility, and tunable transport properties of polymer membranes make them promising technologies for energy-efficient separation and clean energy applications. Compared with conventional thermal separation processes, membrane systems significantly reduce energy consumption and carbon emissions while enabling compact and scalable process integration. Recent advances in polymer chemistry and nanocomposite fabrication have expanded membrane applications in gas separation, desalination, wastewater treatment, solvent recovery, fuel cells, electrolyzers, and electrochemical energy storage systems. This review critically examines the structure–function relationships of membranes in relation to transport phenomena and key performance characteristics, including permeability, selectivity, conductivity, stability, and fouling resistance. Particular attention is given to high-performance materials such as polymers of intrinsic microporosity (PIMs), thermally rearranged polymers, ion-conductive polymers, and mixed-matrix membranes incorporating metal–organic frameworks, covalent organic frameworks, and two-dimensional nanofillers. Recent strategies to overcome the conventional permeability–selectivity trade-off are reviewed together with challenges related to physical aging, plasticization, chemical degradation, and large-scale manufacturability. In addition to material innovation, this review highlights recent developments in advanced fabrication techniques, machine learning-assisted membrane discovery, and sustainable circular manufacturing approaches. Unlike previous reviews focusing on individual applications, this work provides an integrated perspective connecting separation technologies and clean energy systems through common membrane design principles. The development of durable, scalable, and intelligent membrane platforms will be essential for advancing decarbonization, water security, and sustainable industrial production worldwide.
The Impact of Occupational Safety and Health (OSH) Programs Hazard Report and Tahan Report on Reducing Workplace Accidents at PT Merdeka Tsingshan Indonesia Ade Putra Niswan Makkasau; Padhil, Ahmad; A. Dwi Wahyuni P
Journal of Green Chemical and Environmental Engineering Vol. 1 No. 4 (2025): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v4i1.20

Abstract

This study examines the influence of occupational safety and health (OSH) implementation through Hazard Report and Tahan Report programs on improving workplace safety culture and reducing occupational accidents at PT. Merdeka Tsingshan Indonesia. A quantitative approach was employed using a structured questionnaire distributed to company employees, with responses measured on a Likert scale. The collected data were analyzed using descriptive statistics, validity and reliability testing, and multiple linear regression analysis, including partial (t-test) and simultaneous (F-test) hypothesis testing. The findings indicate that the research instrument is both valid and highly reliable, with a Cronbach’s Alpha value exceeding the acceptable threshold. The coefficient of determination shows that approximately 65.4% of the variation in workplace safety culture can be explained by the independent variables, including employees’ understanding of hazard identification, implementation of reporting programs, compliance and participation levels, and program effectiveness. Furthermore, the results reveal that these variables have a statistically significant effect on safety culture, both individually and collectively. This study concludes that the implementation of Hazard Report and Tahan Report programs plays a crucial role in strengthening safety culture and contributes significantly to the reduction of workplace accidents, highlighting the importance of active employee involvement and consistent safety reporting systems in achieving effective occupational safety management.

Page 3 of 3 | Total Record : 25

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