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Program Studi Pendidikan Kimia Fakultas Keguruan dan Ilmu Pendidikan Universitas Nusa Cendana Jl. Adi Sucipto, Penfui P.O. Box 104, Kupang 85001 Nusa Tenggara Timur
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Jurna Beta Kimia
Published by Universitas Nusa Cendana
ISSN : 28077962     EISSN : 28077938     DOI : https://doi.org/10.201185/jbk.v3i1
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education
Jurnal Beta Kimia (JBK) dengan e-ISSN: 2807-7938 (online) dan p-ISSN: 2807-7962 (print) adalah Jurnal yang diterbitkan oleh Program Studi Pendidikan Kimia FKIP Universitas Nusa Cendana. Jurnal ini dengan frekuensi terbitan 2 (dua) kali setahun yaitu pada bulan Mei dan November. Jurnal ini berfokus pada bidang Pendidikan dan Sains Kimia. Naskah artikel yang diterbitkan dalam Jurnal ini adalah Original Article, Short Communication dan review article yang bertujuan untuk memberikan kontribusi dalam diskusi penelitian, pengalaman, pengembangan, pengajaran dan diseminasi terkait bidang pendidikan kimia dan sains kimia. Fokus dan ruang lingkup Jurnal Beta Kimia adalah: Pendidikan dan pengajaran Kimia Pendidikan Sains Media pembelajaran kimia Kimia sekolah Kimia organik Kimia anorganik Kimia fisika Biokimia dan bioteknologi Kimia material Kimia lingkungan Redaksi menerima artikel-artikel dari para pendidik (dosen dan guru), pemerhati Pendidikan kimia, Peneliti Pendidikan Kimia untuk diterbitkan dan Artikel yang diterbitkan dalam jurnal ini merupakan artikel yang belum dan tidak akan diterbitkan di tempat lain.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 102 Documents
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Integration of Multi-Index Method and Qual2kw Evaluation Modeling of Quality Status and Pollutant Dispersion Pattern of Perian River in Kutai Kartanegara Fitria Sari, Dwi; Hamdani, Taufik; Kalauw, Syelvialousiana Ningsih; Ermawati, Rina; Kartika, Rudi; Hadi Raharjo, Slamet Ningsih
Jurnal Beta Kimia Vol 6 No 1 (2026): Volume 6 Issue 1, May 2026
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v6i1.28211

Abstract

This study is intended to assess water quality and determine the pollution status of the Perian River in its upstream (Perian Village) and downstream (Muara Aloh Village) sections in 2025. (COD) parameters. The findings reveal a marked deterioration in water quality from the upstream to the downstream segment of the river. Based on the CCME- WQI, both locations were categorized as "Poor," with scores of 61.95 (upstream) and 57.20 (downstream). The STORET method classifies the upstream status as "Moderately Polluted" (-23) and the downstream as "Heavily Polluted" (-42). Meanwhile, the PI method assigned a "Lightly Polluted" status to both locations. High concentrations of Nitrate (up to 42.57 mg/L) and Fecal Coliform (up to 12,976 counts/100ml) were the primary contributors to water quality degradation. The total actual COD pollution load was 25,344.52 kg/day, with the upstream area contributing a dominant share of 70.09%. Stringent conservation efforts and waste management along the river are required to prevent further degradation. This study also applied pollutant dispersion modeling using the Qual2Kw method.
Study of the Crystal Structure of CaO/SiO₂, MgO/SiO₂, and CaO–MgO/SiO₂ Catalysts Andreas Venans Nahak; Kasimir Sarifudin; Lolita A. M Parera
Jurnal Beta Kimia Vol 6 No 1 (2026): Volume 6 Issue 1, May 2026
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jbk.v6i1.27792

Abstract

This study aims to analyze the crystal structure characteristics and phase composition of the CaO/SiO2, MgO/SiO2, and CaO-MgO/SiO2 catalysts, and to synthesize SiO2 from Ende Flores Natural Zeolite using the hydrothermal and sol-gel methods. CaO was synthesized from Kupang NTT hard water lime deposits, refluxed with HCl, and titrated with Na2CO3, then calcined at 1000 ºC to obtain CaO. MgO was synthesized from MgCO3 calcined at 800 °C. The synthesis of each type of catalyst, CaO/SiO2, MgO/SiO2, and CaO-MgO/SiO2, was carried out using the impregnation method. The XRD characterization results show that, in SiO2, the tridymite phase with a triclinic crystal structure is formed. CaO forms the Lime phase with a cubic crystal structure, while the MgO catalyst shows the Periclase phase and also has a cubic crystal structure. The CaO/SiO2 catalyst forms a single phase, namely Larnite (Ca2SiO4), with a monoclinic crystal structure. The MgO/SiO2 catalyst formed three phases, namely the dominant Periclase phase (MgO) with a cubic crystal structure, the Olivine phase (Mg2SiO4) with an orthorhombic crystal structure, and the Tridymite phase (SiO2) with a cubic crystal structure. The CaO-MgO/SiO2 catalyst forms two phases, namely the dominant phase Olivine (Mg2SiO4) with an orthorhombic crystal structure and the Portlandite phase (CaH2O2) with a trigonal crystal structure.

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