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2 Journal of Ecological Engineering

2 2024

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The Impact of Single-Use Mask Waste on the Quality of Loamy Soil

Khoironi Adian, Manurung Leony Christine, Baihaqi Rifqi Ahmad, Hartini Eko, Aryani Lenci, Wulandari Fitria, Hadiyanto Hadiyanto

Journal of Ecological Engineering

2024

Vol. 25, nr 5

379--388

The COVID-19 outbreak has significantly raised the amount of single-use mask waste in Indonesia. This research intends to assess the effect of single-use mask waste on the quality of loamy soil. The investigation involved constructing a prototype using a 28–cm high column of 19 cm of loamy soil. The study utilized single-use masks in the soil, in which Chili plants were grown on the soil surface. Clean water was employed for the leaching process over 45 days. Soil samples from control, R1, R2, and R3 reactors were analyzed in the laboratory using X-ray fluorescence (XRF) testing and microplastic identification in groundwater. The research findings reveal a notable decline in macro and micronutrients, namely a 1.22% decrease in silicon minerals caused by microplastics interfering with plant metabolic processes. The increase in microplastics caused higher microorganism mortality, leading to a 10.18% decrease in organic carbon content and a 1.47% reduction in soil porosity. Microplastics were discovered in the loamy soil of an average size of 0.3±1.34 mm. Changes in nutrient concentrations and physical properties of the soil indicate that introducing microplastics into loamy soil through mask waste can alter soil characteristics. Additional research is required to investigate the disposal of single-use mask waste due to the ongoing high utilization of disposable masks as personal safety equipment.

Removal of Levofloxacin by Copper Doped Bismuth Oxide Thin Films under UV Light Irradiation

Sa’adah Fatkhiyatus, Sutanto Heri, Hadiyanto Hadiyanto, Jaafar Juhana, Ilsatoham Iir, Alkian Ilham

Journal of Ecological Engineering

2024

Vol. 25, nr 8

207--221

Pharmaceutical wastewater, including antibiotics, is being increasingly detected in the environment as a form of micropollutant. Researchers have progressively concentrated on integrating the advanced oxidation process (AOPs) with photocatalysts such as bismuth oxide (Bi2O3) to degrade antibiotics. The study involved the effective synthesis of pure Bi2O3 and Copper doped Bi2O3 (CBO) thin films using the sol-gel process. These thin films were then coated using the spray coating technique, and studied for their ability to degrade levofloxacin (LFX). The characterization including UV-Vis and XRD were used to analysed the properties of all synthesized thin films. 3% CBO thin films have the good quality compared with other thin films with the lowest energy band gap is 2.54 eV and crystallite size are 28.1938 nm. The degradation efficiency of 3% CBO thin films using photocatalysis is 85.95%. The degradation kinetic rate value is 0.00637 min-1 for pseudo-first-order kinetics and 0.00676 min-1 for pseudo-second-order kinetics. The reusability of CBO thin films was also evaluated to determine the sustainability of the thin films.