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Journal : Jurnal Saintek Lahan Kering

Analisis Kandungan Logam Berat Kromium (Cr) dalam Sedimen di Perairan Teluk Ambon Bagian Dalam Matius Stefanus Batu; Marselina Theresia Djue Tea; Antho Netty Siahaya; Yeslia Utubira
Saintek Lahan Kering Vol 2 No 2 (2019): JSLK Desember 2019
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.194 KB) | DOI: 10.32938/slk.v2i2.870

Abstract

Analysis of Chromium (Cr) heavy metal content in sediment have been done at inner part of Ambon Bay by using Atomic Absorption Spectrofotometer (AAS). This analysis has been done in six sampling areas, they are : Galala (the first locations), Lateri (the second location), Negeri Lama (the third location), Waeheru (the fourth location), Poka (the fifth location), and Halong (the sixth location). The study aims to determine the content of chromium metal (Cr) in sediments at inner part of Ambon Bay. The analysis showed that the Cr metal content ranged from 33.68-191.74 mg/kg. The chromium (Cr) heavy metal content in sediments is mostly among the quality standards set by the ANZECC (Australian and New Zealand Environment and Conservation Council) in 2000, which is 80-120 mg/Kg
Penggunaan Minyak Biji Feun Kase (Thevetia Peruviana) Sebagai Inhibitor Korosi Logam Seng Dalam Media Asam Noviana Getrudis Abi; Matius Stefanus Batu; Maria Magdalena Kolo
Saintek Lahan Kering Vol 6 No 1 (2023): JSLK JUNI 2023
Publisher : Fakultas Pertanian, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/slk.v6i1.2172

Abstract

Research on using Feun Kase (Thevetia Peruviana) seed oil as a corrosion inhibitor for zinc metal has been done. This study aims to determine the optimum conditions of immersion time, inhibitor concentration, and temperature in the corrosion inhibition process. Fun Kase seed oil was obtained by maceration extraction for five days using methanol solvent. The inhibition test using the weight reduction method was carried out with variations in immersion time, inhibitor concentration, and temperature to determine the inhibition efficiency and corrosion rate per year in the corrosion test process. From the research results, the optimum immersion time and inhibitor concentration were obtained at 3 hours of immersion time, and a concentration of 1000 ppm with an inhibition efficiency of 43.16% and a corrosion rate of 13.48 mph, and the optimum temperature was obtained at 30ºC with an inhibition efficiency value of 21.33 %.