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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Ilmiah Ilmu Terapan Universitas Jambi
Amallia, Ra. Hoetary Tirta
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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EVALUATING THE BIOCONCENTRATION FACTORS (BCF) AND ESTIMATED DAILY INTAKE (EDI) OF HEAVY METALS IN LIME PLANTS (CITRUS AURANTIFOLIA) IN SMALL SCALE GOLD ORE PROCESSING AREAS Febriansyah, Febriansyah; Lijaya, Albadi; Rukmini, Rukmini; Amallia, Ra. Hoetary Tirta; Teristiandi, Novin; Saputra, Andi; Soleha, Siti
Jurnal Ilmiah Ilmu Terapan Universitas Jambi Vol. 8 No. 1 (2024): Volume 8, Nomor 1, June 2024
Publisher : LPPM Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jiituj.v8i1.32596

Abstract

Small-scale gold ore processing areas have become a global concern due to their significant contribution to heavy metal pollution. The residual amalgamation process in these areas leads to the accumulation of heavy metals in the environment, which can bioaccumulate in living organisms. This study focuses on the lime plant (Citrus aurantifolia), commonly found in small-scale gold ore processing areas, particularly in Sukamenang village. The research aims to assess the Bioconcentration Factor (BCF) and Estimated Daily Intake (EDI) of heavy metals in lime plants to evaluate the risk to residents who consume them. Samples were collected using random sampling and analyzed with an Atomic Absorption Spectrophotometer (AAS) and a mercury analyzer. The results indicate that Citrus aurantifolia has a BCF value of less than 1 (<1), classifying it as an excluder plant, effectively preventing heavy metals from entering its upper parts and allowing it to thrive in polluted environments. However, the consumption of these plants poses health risks. The study highlights the Reference Dose (RfD) values for heavy metals: Cu at 4.0 x 10^-2 (0.008), Fe at 0.7, and Hg at 0.0001, as recommended by the United States Environmental Protection Agency (USEPA) in 2011. Heavy metals such as Fe, Cu, and Hg in the lime plants indicate potential adverse health effects due to their toxicity. This research underscores the necessity for monitoring and mitigating heavy metal pollution in small-scale gold ore processing areas to protect public health and the environment.
Evaluasi hasil belajar siswa pada materi sistem pencernaan manusia melalui penerapan metode discovery learning di kelas VIII SMP Nurul Iman Palembang Sariwulan, RR. Mini; Hadi, Abdul; Amallia, Ra. Hoetary Tirta; Setiyanto, Sugeng; Amrullah, Fairuzzabadi; Romadhan, Muhammad Fauzi
Jurnal Penelitian Pendidikan IPA Vol 11 No 12 (2025): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i12.13092

Abstract

The surge in diverse teaching methods necessitates systematic evaluation of their effectiveness. This study evaluated student learning outcomes in three domains (cognitive, psychomotor, and affective) following the discovery learning implementation on the human digestive system material in Grade VIII at Nurul Iman Middle School Palembang. Using a mixed-method approach, 36 students were assessed through: (1) a 20-item multiple-choice posttest including literacy questions, (2) poster creation evaluated by three observers using five aspect rubrics, and (3) self-evaluation questionnaires covering communication, discipline, teamwork, and character. Results revealed suboptimal cognitive achievement, with only 47% meeting the minimum completion criteria (≥70), though students demonstrated strong performance on literacy questions (61-83% correct). Psychomotor skills averaged 74 (sufficient category), showing varied creative abilities in applying digestive health knowledge. Affective outcomes averaged 80 (good category), indicating positive attitude development. The discovery learning method effectively fostered literacy skills and affective development but requires instructional refinement to optimize conceptual understanding and application in the cognitive domain.
Co-Authors Abdul Hadi Amrullah, Fairuzzabadi Andi Saputra Febriansyah Febriansyah Lijaya, Albadi Novin Teristiandi Romadhan, Muhammad Fauzi Rukmini Rukmini Sariwulan, Rr. Mini Setiyanto, Sugeng Soleha, Siti