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All Journal International Journal of Research in Vocational Studies (IJRVOCAS) Gelora: Jurnal Pendidikan Olahraga dan Kesehatan IKIP Mataram
Pratama, Andrian Putra
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Study on the Utilization of Egg Shells as CO2 Adsorbent in the Combustion Process of Empty Palm Fruit Bunches Pratama, Andrian Putra; Yerizam, Muhammad; Syarif, Aida
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 2 (2025): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i2.429

Abstract

The problem of carbon dioxide (CO2) emissions from the combustion of biomass, such as empty palm fruit bunches (TKKS), is a significant challenge in climate change mitigation efforts. This research aims to examine the effectiveness of eggshells as a CO2 adsorbent in the combustion process of empty palm fruit bunches, and to analyze the effect of adding adsorbent mass on exhaust gas emissions. Eggshells were calcined at 900°C to produce calcium oxide (CaO), then characterized using XRD and Iodine Number tests, and tested in a CO2 adsorption system using gas flow. The XRD test results showed that calcined eggshells have a crystalline structure with a crystalline level of 93.54%, indicating the dominance of CaO compounds as the active component. The Iodine Number test yielded the highest value of 330.018 mg/g at a mass of 2 grams, which indicates good surface area and porosity. CO2 adsorption testing showed that an adsorbent mass of 15 grams was able to reduce CO2 concentration from 974 ppm to 212 ppm, while adding adsorbent mass above 30 grams did not provide a significant reduction due to the increasing initial CO2 concentration. Overall, the results of this study indicate that eggshells have the potential to be an effective, environmentally friendly, and organic waste-based CO2 adsorbent. Their utilization can be an alternative simple carbon capture technology for biomass combustion systems, while also supporting sustainable household waste management.
Pengaruh Latihan Jump Stop Shoot dan Triple Threat Position Terhadap Hasil Jump Shoot Basket Chandra, Dadang Warta; Pratama, Andrian Putra
Gelora : Jurnal Pendidikan Olahraga dan Kesehatan IKIP Mataram Vol. 10 No. 2 (2023): SEPTEMBER
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/gjpok.v10i2.20500

Abstract

Penelitian ini menjawab hipotesis bahwa latihan jump stop shoot dan triple threat position berpengaruh terhadap peningkatan hasil jump shoot, serta bahwa jump stop shoot memberikan peningkatan lebih besar pada tim basket SMA Negeri 1 Gerung. Masalah penelitian berangkat dari rendahnya stabilitas tubuh, tumpuan kaki, keseimbangan ketika melompat, dan akurasi tembakan siswa saat melakukan jump shoot. Penelitian menggunakan metode eksperimen dengan desain ordinal pairing. Sampel terdiri atas 12 siswa peserta ekstrakurikuler basket yang dibagi menjadi dua kelompok seimbang berdasarkan hasil pre-test. Kelompok A mendapat perlakuan latihan jump stop shoot, sedangkan kelompok B mendapat perlakuan latihan triple threat position selama 16 pertemuan, termasuk pre-test dan post-test. Instrumen penelitian berupa tes jump shoot dari area free throw dengan 10 kesempatan dalam waktu dua menit. Data dianalisis melalui statistik deskriptif, uji normalitas Kolmogorov-Smirnov, dan paired sample t-test. Hasil menunjukkan rerata kelompok A meningkat dari 4,17 menjadi 6,17 bola masuk, dengan Sig. (2-tailed) = 0,003 < 0,05. Kelompok B meningkat dari 4,00 menjadi 5,67 bola masuk, dengan Sig. (2-tailed) = 0,004 < 0,05. Perbandingan gain menunjukkan peningkatan kelompok A sebesar 2,00, sedangkan kelompok B sebesar 1,67. Temuan ini menegaskan bahwa kedua bentuk latihan efektif meningkatkan hasil jump shoot, namun jump stop shoot lebih unggul karena mengintegrasikan penghentian gerak, keseimbangan, transfer gaya tungkai, dan pelepasan bola dalam pola gerak yang menyerupai situasi permainan. Keywords: jump stop shoot; triple threat position; jump shoot; bola basket; latihan teknik
Co-Authors AIDA SYARIF Chandra, Dadang Warta Muhammad Yerizam