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All Journal Science and Technology Indonesia Edukasi dan Didatika: Jurnal Ilmiah Pendidikan Dasar
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Education Environmental Science Materials Science & Nanotechnology Physics Other

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Analisis Aspek Koneksi matematis pada permainan botol angka di TK TA AL Matholi Tunahan Jepara Tahun 2024/2025 Solekah; Sulianto, Joko; Ardi, Bagus
Edukatika Vol. 2 No. 2 (2024): Desember
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/edukatika.v2i2.1887

Abstract

Penelitian ini bertujuan untuk menganalisis aspek koneksi matematis dalam kegiatan pembelajaran melalui permainan botol angka di TK TA Al Matholi Tunahan, Jepara. Permainan botol angka dirancang sebagai media pembelajaran interaktif untuk mengenalkan konsep matematika dasar kepada anak usia dini. Penelitian ini menggunakan pendekatan deskriptif kualitatif, dengan subjek penelitian meliputi siswa kelompok A . Data dikumpulkan melalui observasi, wawancara, dan dokumentasi, kemudian dianalisis menggunakan teknik analisis tematik. Hasil penelitian menunjukkan bahwa permainan botol angka mampu mengembangkan kemampuan koneksi matematis anak, seperti menghubungkan konsep angka dengan benda konkret, memahami pola hubungan antarangka, dan mengenali aplikasi matematika dalam kehidupan sehari-hari. Selain itu, interaksi dalam permainan ini juga mendorong anak untuk berpikir kritis, bekerja sama, dan meningkatkan keterampilan motorik halus. Guru memiliki peran penting dalam mengarahkan dan memfasilitasi kegiatan agar tujuan pembelajaran tercapai secara optimal.
Evaluation of Photocatalytic and Catalytic Activity of Biochar/Nickel for Laboratory Wastewater Treatment Fatimah, Is; Solekah; Nurlaela, Nunung; Ahmad, Zeeshan; Rizky, Indah Tri; Kamari, Azlan; Sagadevan, Suresh; Doong, Ruey-an
Science and Technology Indonesia Vol. 11 No. 2 (2026): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2026.11.2.579-595

Abstract

In this investigation, an exploration on the use of low-cost effective methods for laboratory wastewater treatment using magnetic biochar has been conducted. Magnetic biochar derived from orange peel waste loaded with nickel nanoparticles (Biochar/Ni) was prepared by pyrolysis procedure of orange peel waste with nickel chloride as nickel precursor at 600 oC for 2 h. X-ray diffraction (XRD), scanning electron microscopy-energy dispersive x-ray (SEM-EDX), Raman spectroscopy, and vibrating sample magnetometer (VSM) were employed for identify the feature of Biochar/Ni. Photocatalytic, photocatalytic oxidation, and microwave-assisted catalytic peroxidation were the treatment procedures employed to evaluate the activity of Biochar/Ni. The results showed the dispersed nickel nanoparticles in the composite are photocatalytic system to produce radicals for decolorizing laboratory wastewater as proven by accelerated oxidation by the addition of H2O2 and S2O82- as oxidants, and inhibition by the addition of radicals and superoxide radical scavengers. In addition, microwave-irradiation intensified catalytic peroxidation with shorter time and higher decolorization efficiency. The greenness evaluation of the process using AGREE software addressed the microwave-assisted catalytic peroxidation as the most efficient procedure utilizing Biochar/Ni for being developed and implemented to organic contaminated wastewater.
Co-Authors Ardi, Bagus Doong, Ruey-an Is Fatimah Joko Sulianto . . Kamari, Azlan Nurlaela, Nunung Rizky, Indah Tri Sagadevan, Suresh Zeeshan Ahmad