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ENVIRONMENTALLY FRIENDLY BIFUNCTIONAL MATERIALS BASED ON ZnO/NATURAL ZEOLITE FOR METHYLENE BLUE DYE REMOVAL IN WATER Nugroho, Muhammad Garda; Putri, Bilgis Laily Pratama; Mukharomah, Nur Laili Alfiatin; Wibisono, Alvin Adrian; Nurherdiana, Silvana Dwi; Wafi, Abdul
Jurnal Kimia Riset Vol. 9 No. 2 (2024): December
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v9i2.65751

Abstract

The treatment of dye wastewater, particularly from the batik industry, poses significant environmental challenges. This study explores the potential of ZnO-coated clinoptilolite natural zeolite as a dual-functional material for efficient and eco-friendly wastewater treatment through adsorption and photocatalysis. This study employed various solvents, i.e., aquadest and ethylene glycol and different treatments of heating and sintering to ensure the ZnO-coated natural zeolite. The ZnO/zeolite composite achieved a dye degradation efficiency of up to 98.68% under UV irradiation within 90 minutes. Characterization through SEM, FTIR, and XRD analyses confirmed the successful synthesis and structural integrity of the ZnO/zeolite composite. We also conducted an analysis of operational costs and energy consumption associated with the use of these bifunctional materials. The results indicate that the potential for utilizing these materials as a treatment method is promising, given their ease of use and low energy consumption, and warrants further investigation.
Pengaruh Kegiatan Pembangkit Listrik Tenaga Gas dan Uap PT X Terhadap Emisi Gas SO2 dan NOx Mukharomah, Nur Laili Alfiatin; Ningrum, Dwi Mulyati; Claudya, Agnes Lidya
Envirous Vol. 5 No. 2 (2025): Jurnal Envirous
Publisher : UPN "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/envirous.v5i2.346

Abstract

Climate change is a global phenomenon that triggers social and ecological crises. Indonesia has committed to the Sustainable Development Goals (SDGs) to reduce greenhouse gas (GHG) emissions as stated in the Nationally Determined Contribution (NDC). The NDC targets lowering emissions by 41% by 2030 with independent efforts and international assistance. This study aims to analyze SO2 and NOx emissions from the Gas and Steam Power Plant (PLTGU) at X Company, with reference to the applicable air quality standards, namely the Regulation of the Director General of Pollution Control and Environmental Damage Number P.17/PPKL/PPU/KUM.1/10/2022. The methods used in the analysis process are USEPA Method 6C: 2017 in determining Sulfur Dioxide (SO2) gas and USEPA Method 7E: 2020 in determining Nitrogen Oxide (NOx) gas. Field measurements were conducted at several sampling points in HRSG Blocks II.1, II.2, and II.3. The analysis results show that the SO2 and NOx emission concentrations are still below the maximum permissible limits with the highest SO2 and NOx emission concentrations of 291 Mg/Nm³ and 6 Mg/Nm³, respectively