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All Journal JURNAL PENDIDIKAN TAMBUSAI Journal of Coastal and Ocean Sciences
Fajriani, Annisa
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Physics Social Sciences

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Heavy Metal (Pb, Cu, and Zn) Content in Geloina erosa and Cerithidea obtusa from the Western Coast of Dumai, Riau Province Fajriani, Annisa; Amin, Bintal; Efriyeldi, Efriyeldi
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.166-173

Abstract

Industrial and shipping activities in coastal areas have the potential to increase heavy metal pollution, which can accumulate in marine organisms and impact food safety. On the west coast of Dumai, Geloina erosa and Cerithidea obtusa are widely consumed by the local community, making it important to study their heavy metal content. This study aims to analyse the levels of Pb, Cu, and Zn in the soft tissues of these two species and compare the differences between species and sampling locations. The study was conducted in February 2025 at two stations: Station 1 (Purnama) and Station 2 (Pangkalan Sesai). Samples were collected using purposive sampling and analysed using Atomic Absorption Spectroscopy (AAS). The results showed that the average Pb, Cu, and Zn content in G. erosa were 6.79 µg/g, 6.13 µg/g, and 8.36 µg/g, respectively, while in C. obtusa they were 7.09 µg/g, 6.27 µg/g, and 7.41 µg/g. Significant differences (p < 0.05) were detected in the Cu and Zn content in G. erosa, as well as Zn in C. obtusa, between stations. Pb and Cu were generally higher in both species at Station 2, while the highest Zn levels were found in G. erosa at Station 1 (9.12 µg/g) and C. obtusa at Station 2 (8.50 µg/g). The highest PTWI value was found in G. erosa at Station 1; however, all results remained within safe consumption limits. Therefore, both species are deemed safe for consumption, despite variations in heavy metal content between species and research locations
Strategi Pemasaran Jajanan Tradisional Kue Putu di Sumatera Barat Fajriani, Annisa; Susanti, Ratnaningtyas
Jurnal Pendidikan Tambusai Vol. 9 No. 1 (2025)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i1.26611

Abstract

Penelitian ini bertujuan untuk mengetahui analisis strategi pemasaran jajanan tradisional Kue Putu agar tetap diminati masyarakat secara nasional. Penelitian ini menggunakan pendekatan fenomenologi dan tergolong jenis penelitian deskriptif kualitatif. Sumber data dalam penelitian ini meliputi: Sumber Data Primer dan Sumber Data Sekunder. Hasil penelitian menunjukkan dengan adanya Pemasaran jajanan tradisional kue putu ini telah meningkatkan penjualan baik secara lokal maupun nasional, hal ini dibuktikan dengan para penjual memvariasikan model dan bentuk kue putucangkiri dengan beberapa warna tanpa meninggalkan rasa dan menjauhi bahan pengawet dan pewarna yang menjadi alasan masyarakat tetap menyukai makanan ini.
Co-Authors Bintal Amin Efriyeldi, Efriyeldi Susanti, Ratnaningtyas