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All Journal Journal Serambi Engineering (JSE)
Aisyah Protonia Tanjung
Universitas Malikussaleh
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering

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Mechanical Properties and Microstructural Characterization of Paper Produced from Rice Straw–Waste Paper Pulp Blends via Ethanol Organosolv Process Aisyah Protonia Tanjung; Nadya Yunisa Fahmi; Dewi Fitria Marlisa; Maisarah; Lusyana Eka Wardani; Misbul Hadi; Rahmatun Maula
Jurnal Serambi Engineering Vol. 11 No. 3 (2026): Juli 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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The utilization of lignocellulosic agricultural waste as an alternative raw material for paper production offers a sustainable approach to reducing dependence on wood-based pulp. This study investigated the mechanical properties and microstructural characteristics of paper produced from blends of rice straw organosolv pulp and recycled waste paper pulp at a 1:1 ratio using 15 wt% polyvinyl acetate (PVAc) as binder. Sixteen paper samples were prepared under various ethanol concentrations (15–60 wt%) and cooking times (60–120 min). Mechanical characterization included tensile strength, elongation of break, and Young’s modulus, while surface morphology was analyzed using Scanning Electron Microscopy (SEM). The tensile strength ranged from 2.06 to 4.22 MPa, elongation of break from 6.00 to 16.06%, and Young’s modulus from 0.155 to 0.529 MPa. All samples satisfied the minimum tensile strength requirement of SNI 14-6519-2001. SEM observations revealed that higher tensile strength was associated with denser and more homogeneous fiber networks with fewer voids and surface defects. The optimum tensile strength was achieved at 30 wt% ethanol and 60 min cooking time, indicating favorable fiber bonding and structural integrity.
Analysis of Multi-Factor Inundation Vulnerability in Palu City Using GIS-Based Weighted Overlay Lusyana Eka Wardani; Nurhilal Fauziah Ramlan; Aisyah Protonia Tanjung; Maisarah; Qanitatul Isra Qamal
Jurnal Serambi Engineering Vol. 11 No. 3 (2026): Juli 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Inundation recurs annually in Palu City despite its relatively low annual rainfall of 657 to 870 mm/year. This condition indicates that physical land characteristics strongly influence inundation vulnerability. This study assesses inundation vulnerability across the administrative area of Palu City using an expert-based GIS weighted overlay method. Six variables were analyzed: rainfall, soil texture, slope gradient, land use, topography, and river buffer zones. The assigned weights were rainfall 15%, soil texture 10%, slope gradient 10%, land use 25%, topography 20%, and river buffer zones 20%. Data were obtained from BPBD, BMKG, DEMNAS/BIG, SRTM/USGS, and DPUPR Palu City, then processed using ArcGIS 10.8. The final vulnerability index was classified into five classes using the equal interval method. The results show that 4.47 km² (1.13%) is very low, 138.07 km² (34.95%) low, 136.25 km² (34.49%) moderate, 103.45 km² (26.19%) high, and 12.82 km² (3.25%) very high. High and very high zones are concentrated in East Palu, South Palu, and West Palu. Mitigation priorities include river buffer control, drainage revitalization, and riparian revegetation.
Co-Authors Dewi Fitria Marlisa Lusyana Eka Wardani Maisarah Misbul Hadi Nurhilal Fauziah Ramlan Qanitatul Isra Qamal Rahmatun Maula Yunisa Fahmi, Nadya