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All Journal Communications in Science and Technology RISTEKDIK : Jurnal Bimbingan dan Konseling
Fitria, Anissa
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Education Engineering

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Synthesis, characterization and performance of Ni/mesoporous silica - NH\(_2\)/mesoporous silica and Ni-NH\(_2\)/mesoporous silica as bifunctional catalyst in one step conversion of waste palm oil to biodiesel Fitria, Anissa; Trisunaryanti, Wega; Triyono; Santoso, Iman
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1483

Abstract

Sidoarjo mud is a natural material resulted from an unusual natural phenomenon and is rich in silica contents. So far, no studies have been reported about mesoporous silica from Sidoarjo Mud, which is a supported catalyst for one-step conversion to biodiesel. This study aims to explore synthesis, characterization, and applications to demonstrate the heightened activity and selectivity in the esterification- transesterification of waste palm oil into biodiesel, utilizing a one-step method aligned with the principles of green chemistry using two bifunctional catalysts (Ni/MS - NH2/MS and Ni-NH2/MS). The bifunctional catalysts were prepared by means of hydrothermal, wet impregnation, and grafting methods. The highest biodiesel yield (78.77%) was achieved under the condition of 65 °C, 3 h, methanol to oil ratio 21 : 1, and 3wt% of Ni/MS - NH2/MS as the catalyst. The catalyst was able to yield a conversion level as good as ~72% in the 3rd cycle after regeneration. The research demonstrates the industrial relevance of the catalyst, offering a sustainable solution for biodiesel production and waste management.
LAYANAN BIMBINGAN KLASIKALAL MENGGUNAKAN METODE PROBLEM BASED LEARNING DENGAN MEDIA WORDWALL UNTUK MENURUNKAN PERILAKU BULLYING Fitria, Anissa; Kurnaningsih, Yari Dwi
Ristekdik : Jurnal Bimbingan dan Konseling Vol 9, No 2 (2024): RISTEKDIK: JURNAL BIMBINGAN DAN KONSELING - APRIL-JUNI 2024
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/ristekdik.2024.v9i2.237-243

Abstract

Tujuan penelitian ini adalah untuk mengetahui 1) penurunan perilaku bullying kelas VIII C SMP Negeri 2 Salatiga dapat dilakukan melalui layanan bimbingan klasikal dengan metode problem based learning dengan media wordwall, 2) perilaku bulling dapat diturunkan melalui bimbingan klasikal dengan media wordwall. Penelitian ini menggunakan metode mix method dengan pendekatan kualitatif dan kuantitatif. Hasil yang diperoleh peneliti menunjukan adanya penurunan signifikan pada peserta didik kelas VIII C SMPN 2 Salatiga. Hal ini terbukti dari hasil pengujian hipotesis menunjukan nilai signifikan dua sisi (2 tailed) 0,005 yaitu 0,000 0,005 maka hipotesis nihi (H0) ditolak dan hipotesis alternative (Ha) diterima.
Co-Authors Aminuyati Kurnaningsih, Yari Dwi Triyono Wega Trisunaryanti