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All Journal Sustainable Applied Modification Evidence Community Science Get Journal
Eka Cahya Muliawati
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Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Physics Public Health

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Community Empowerment in Managing Household Hazardous Waste in Residential Neighbourhoods Tantri Wenny Sitanggang; Mila Sari; Kalasta Ayunda Putri; Sandi Setiadi; Eka Cahya Muliawati
Sustainable Applied Modification Evidence Community (SAMEC) Vol 1 No 2 (2024): December, 2024
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/samec.v1i2.95

Abstract

This study adopts a mixed-methods approach, combining qualitative and quantitative techniques, to evaluate household hazardous waste management practices. Data were collected through surveys, in-depth interviews, and direct observations. Quantitative data were analyzed using descriptive statistics to measure community awareness levels and the effectiveness of waste management infrastructure, while thematic analysis was applied to qualitative data to identify key issues and patterns in community behavior. The findings highlight the effectiveness of community empowerment programs in improving knowledge and practices, with recognition of hazardous waste types increasing to 85%, understanding of associated hazards to 82%, and a reduction in littering behavior from 65% to 20%. These results underscore the importance of multi-stakeholder collaboration, infrastructure enhancement, and the integration of circular economy principles to achieve sustainable waste management. The study provides actionable, data-driven recommendations for reducing health and environmental risks associated with hazardous waste, emphasizing the need for continuous monitoring and community engagement.
The Relationship Between Indoor Air Quality and Student Productivity in the Era of Hybrid Learning Hasnawati; Eka Cahya Muliawati
Sustainable Applied Modification Evidence Community (SAMEC) Vol 2 No 2 (2025): December, 2025
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/samec.v2i2.287

Abstract

The post-pandemic shift in education has accelerated the adoption of hybrid learning, which integrates both online and face-to-face instruction. Within this setting, indoor air quality (IAQ) plays a vital role in affecting students’ comfort, health, and productivity. This study investigates the relationship between IAQ and student productivity in the hybrid learning era. A quantitative approach was employed using a correlational survey design, involving several schools selected through purposive sampling. IAQ parameters measured included carbon dioxide (CO₂), temperature, relative humidity, and particulate matter (PM2.5 and PM10), using standardized digital instruments. Student productivity was evaluated via a structured questionnaire addressing concentration, focus, and academic performance. Descriptive analysis revealed that average levels of CO₂ (1185.6 ppm), PM2.5 (41.7 µg/m³), and PM10 (64.2 µg/m³) exceeded health standards, whereas temperature (28.3°C) and humidity (61.2%) remained within moderate limits. Productivity scores were in the fair-to-good range (average concentration 3.7; focus 3.5; academic achievement 77.8), with notable differences observed across classes. Pearson correlation analysis indicated significant negative associations between CO₂, PM2.5, and PM10 with all productivity indicators (p < 0.05). Multiple linear regression identified CO₂ (β = -0.412) and PM2.5 (β = -0.387) as the most influential factors in reducing student productivity. These results suggest that poor indoor air quality, particularly elevated CO₂ levels and fine particulate matter, is a key determinant that can impede the effectiveness of hybrid learning.
Variation in SiMn Composite Composition Using Modified Polydimethylsiloxanes (PDMS) on Corrosion Properties and Contact Angles Eka Cahya Muliawati; Dwi Lulu Laurantini
Science Journal Get Press Vol 2 No 2 (2025): April, 2025
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/science.v2i2.134

Abstract

Corrosion is one of the main challenges faced by advanced industries today because it can cause major losses in terms of safety and economy. One of the common protection methods used to reduce the impact of corrosion is polymer-based coating, which can provide hydrophobic properties on the substrate surface. This study aims to examine the effect of variations in the composition of silica-manganese (SiMn) composites reinforced with polydimethylsiloxane (PDMS) on hydrophobic properties, corrosion resistance, and contact angles. The coating method used is spin coating, with the substrate being a mixture of hard and strong silica and manganese which has corrosion-resistant properties. The SiMn compositions varied were 40%:60%, 50%:50%, and 60%:40%. This study is experimental, using tools such as HEM-3D, XRD, SEM, and FTIR. The coating process was carried out by mixing 2.5 grams of PDMS with silica and manganese powders with a total weight of 1 gram, according to the composition variations. The contact angle test was conducted using a DSLR camera, while the corrosion resistance test was conducted using the immersion method in sulfuric acid with the mass loss method. The results showed that variations in composition affected the contact angle and corrosion resistance of the SiMn-PDMS layer. The composition of 0.6 grams of silica and 0.4 grams of manganese produced the highest contact angle of 120.66⁰, indicating higher hydrophobic properties. Conversely, the composition of 0.4 grams of silica and 0.6 grams of manganese showed the lowest corrosion rate, which was 1.57 cm/hour.
Synthesis and Characterization of Optical Properties of Talc/Montmorillonite Nanocomposites via Sol-Gel and Ball Milling Methods Sefrilita Risqi Adikaning Rani; Eka Cahya Muliawati
Science Journal Get Press Vol 2 No 3 (2025): July, 2025
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/science.v2i3.164

Abstract

Nanocomposites derived from talc (Mg₃Si₄O₁₀(OH)₂) and montmorillonite (MMT) have gained considerable attention due to their tunable optical, mechanical, and thermal properties. This study systematically compares two synthesis techniques—sol-gel processing and ball milling—for fabricating talc/MMT nanocomposites, with a focus on their optical characteristics. The sol-gel method promoted homogeneous nanoparticle dispersion, while ball milling enhanced exfoliation and reduced particle size. Comprehensive characterization via X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) spectroscopy, and photoluminescence (PL) spectroscopy revealed that the nanocomposites exhibit strong UV absorption in the 200–400 nm range, a reduced optical bandgap from 4.5 eV to 3.8 eV, and enhanced PL intensity compared to pristine materials. These findings suggest promising applications in UV shielding, optoelectronics, and photocatalytic systems. The study concludes that the choice of synthesis method plays a pivotal role in tailoring the nanocomposites’ structural integrity and optical functionality, with sol-gel favoring intercalation and uniformity, while ball milling enhances exfoliation and defect-mediated performance. This comparative study highlights the critical influence of synthesis method on the structural, morphological, and optical properties of talc/MMT nanocomposites, providing valuable insights for optimizing layered silicate-based materials for advanced functional applications.
Engineering of Superhydrophobic Materials: Applications and Prospects in Oil-Water Separation Technology Silvia Devi Eka Putri; Eka Cahya Muliawati
Science Journal Get Press Vol 2 No 3 (2025): July, 2025
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/science.v2i3.165

Abstract

The rapid growth of industries like petrochemical processing, offshore drilling, transportation, and metallurgy has increased oily wastewater and oil spills, threatening ecosystems and human health. Traditional oil-water separation methods often struggle with low efficiency and poor stability, especially against stable emulsions. This study investigates superhydrophobic materials fabricated via dip-coating on stainless steel mesh, electrospinning of PVDF membranes, and chemical etching of aluminum surfaces. All materials showed excellent water repellency with contact angles over 150°, achieving oil-water separation efficiencies above 97% for various oils. The dip-coated mesh achieved the highest flux and separation efficiency, while the electrospun membrane offered enhanced chemical resistance and durability. Despite promising results, challenges remain including mechanical abrasion resistance, environmental concerns over hydrophobic coatings, and scalability for industrial use. Future research should focus on eco-friendly, self-healing, and stimulus-responsive coatings to improve durability and environmental safety, advancing the practical application of superhydrophobic materials in wastewater treatment and oil spill remediation.
Co-Authors Dwi Lulu Laurantini Hasnawati Kalasta Ayunda Putri Mila Sari Rani, Sefrilita Risqi Adikaning Sandi Setiadi Silvia Devi Eka Putri