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All Journal Jurnal Tadris Kimiya PENDIPA Journal of Science Education
M. Lutfi Firdaus
Bengkulu University
Chemistry Education Mathematics

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Extraction of Silica from Bengkulu Beach Sand using Alkali Fusion Method Soraya Nur Ishmah; M. Diki Permana; M. Lutfi Firdaus; Diana Rakhmawaty Eddy
PendIPA Journal of Science Education Vol 4, No 2 (2020): MARCH - JUNE
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (255.454 KB) | DOI: 10.33369/pendipa.4.2.1-5

Abstract

Silica is one of the potential minerals to be developed and applied in various industrial fields. High purity of silica can be obtained by utilizing natural materials such as beach sand. In this research the solid-liquid extraction (leaching) method was used in three main steps. Bengkulu beach sand as precursors reacted with NaOH (alkaline fusion) at 95°C to form Na2SiO3, then addition of HCl to form Si(OH)4, and drying the silica gel becomes SiO2. Based on the initial content analysis in Bengkulu sand contained 69.87% silica and other compounds with a lower percentage. The extracted silica was characterized using XRF and the purity of silica increase to 97.3%. The XRD characterization results showed that the silica formed was in the amorphous phase. Si-O-Si and Si-O bonds which are characteristics of SiO2 were identified in the FT-IR spectrum with absorption bands of 798.8 cm-1 and 475.1 cm-1 respectively.
Ethnoscience-Based Module: Biodiversity Materials in Lembak Tribe Ahmad Walid; Endang Widi Winarni; Fitri April Yanti; M. Lutfi Firdaus; Suherman Suherman; Zulkarnain Zulkarnain
Jurnal Tadris Kimiya Vol 7, No 2 (2022)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v7i2.19955

Abstract

Efforts to conserve plants and documentation of related local knowledge in the Dendam Tak Sudah Lake, Dusun Besar Village, Bengkulu City area are important to carry out and introduce to students. The study aims to synthesize the biodiversity material modules developed to identify the types of medicinal plants found in Dusun Besar Village. Thiagarajan's development model section is define, design, develop, and disseminate. Identification, synthesis, feasibility, response, and analysis data were obtained as research data. The module was piloted in five elementary schools in Bengkulu City. The study found 20 types of medicinal plants, including the most commonly used hereditary species in the Lembak community. The validation results show that the criteria are very valid, with an expert validator value of 85%. The module also received an excellent response rate of 82%. Therefore, the biodiversity material modules are very attractive, feasible, and effective for learning biodiversity materials in elementary schools.
Co-Authors Ahmad Walid Diana Rakhmawaty Eddy Endang Widi Winarni Fitri April Yanti M. Diki Permana Soraya Nur Ishmah Suherman Suherman Zulkarnain Zulkarnain