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All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN Charm Sains : Jurnal Pendidikan Fisika Jurnal Abdimas Maduma
Samosir, Harrys
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Humanities Automotive Engineering Education Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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ADSORPSI LOGAM BERAT OLEH KARBON AKTIF BAMBU SCHIZOSTACHYUM DI AIR TANAH BALIKPAPAN Samosir, Harrys; Michael Alexander Hutabarat; Devina Sanchia Samosir
Charm Sains: Jurnal Pendidikan Fisika Vol 6 No 2 (2025): JUNI
Publisher : Program Studi Pendidikan Fisika Jurusan Fisika Fakultas Matematika, Ilmu Pengetahuan Alam, dan Kebumian (FMIPAK), Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/charmsains.v6i2.477

Abstract

Water pollution caused by industrial activities, particularly by heavy metals and non-biodegradable dyes, has become an increasingly serious issue. Adsorption using activated carbon is an effective, economical, and simple solution. Local bamboo such as Schizostachyum sp. from Balikpapan holds potential as a sustainable and low-cost raw material for activated carbon. This study examines the optimal production parameters by analyzing the material properties and adsorption performance. The methods used include the carbonization and activation of Schizostachyum sp. bamboo, crystal structure characterization using X-ray Diffraction (XRD), surface morphology analysis using Scanning Electron Microscopy (SEM), and the evaluation of heavy metal adsorption efficiency using Atomic Absorption Spectroscopy (AAS). The results showed a very high adsorption efficiency, with lead and cadmium removal exceeding 97%, demonstrating its potential as a non-toxic adsorbent.
UTILIZATION Of Sn-Sb-S AS A NEW MATERIAL SENSITIZED SOLAR CELLS Samosir, Harrys; Robiandi, Fadli; Shoodiqin, Dian Mart
ROTOR Vol. 17 No. 2 (2024)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v17i2.53391

Abstract

In this research process to observe the utilization of Sn-Sb-S for new material solar cells. With the SILAR (successive ionic layer adsorption and reaction) method, it was found that good conditions for growing quantum dots on the surface of TiO2 were 8 turns to get Sn-S and 6 turns for SbS and heated at 325 0C for 12 minutes. As for tools to analyze Sn-Sb-S there are quantum dots by observing using XRD and the size of quantum dots. UV Visible is used to observe the gap energy of 1.63 eV which includes a wavelength of 300-850 nm. The use of SEM to observe the morphological characteristics of Sn-Sb-S on the surface of TiO2 obtained the size of quantum dots ~ 16.6 nm. The best sample with ZnSe passivation layer resulted in short circuit current density Jsc of 14.04 mA/cm2 open circuit voltage Voc of 0.46 V, fill factor FF of 39.91%, and power conversion efficiency η of 2.58% under 1 sun. Keywords: quantum dots, science materials, renewable energy
Sosialisasi Literasi Membaca Anak Melalui Buku Komik Samosir, Harrys; Yuvita Lira Vesti Arista; Hutabarat, Michael Alexander
JURNAL ABDIMAS MADUMA Vol. 4 No. 3 (2025): Oktober, 2025
Publisher : English Lecturers and Teachers Association (ELTA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52622/jam.v4i3.502

Abstract

Minat baca anak di lingkungan perumahan sering kali masih rendah, terutama karena media bacaan yang tersedia kurang menarik dan tidak mampu membangkitkan rasa ingin tahu. Anak-anak cenderung lebih tertarik pada bacaan bergambar dan berwarna yang dapat merangsang imajinasi serta keterlibatan mereka. Berdasarkan kondisi tersebut, kegiatan sosialisasi literasi membaca dilaksanakan di Perumahan Pesona Bukit Batuah RT 71, Balikpapan, Kalimantan Timur, dengan tujuan meningkatkan minat baca anak melalui pendekatan berbasis visual menggunakan komik edukatif. Kegiatan ini mencakup pembagian buku komik, sesi membaca bersama, serta diskusi isi cerita yang dipandu secara interaktif. Hasilnya menunjukkan peningkatan antusiasme anak-anak dalam membaca; mereka lebih bersemangat mengikuti kegiatan dan aktif berdiskusi mengenai cerita yang dibaca. Temuan ini memberikan implikasi bahwa pendekatan visual melalui komik edukatif dapat menjadi strategi sederhana namun efektif untuk menumbuhkan budaya literasi sejak dini di lingkungan perumahan. Kata Kunci : Literasi Anak; Komik Edukatif; Keterlibatan Membaca
Co-Authors Devina Sanchia Samosir Fadli Robiandi Michael Alexander Hutabarat shoodiqin, dian mart Yuvita Lira Vesti Arista