Upik Nurbaiti, - (2011) Magnetic Properties Of Suspended Of Polluted Heavy Metal Sediments From Semarang Rivers. Jurnal Pendidikan Fisika Indonesia, 7 (2). pp. 134-137. ISSN 2355-3812

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Abstract

Magnetic properties, in the form of magnetic susceptibility ©, frequency-dependent susceptibility (cfd), and isothermal remanent magnetization (IRM) were measured on scores of samples made of suspended sediments from rivers nearby Semarang, Central Java. Semarang is one the major cities in Indonesia, where the river systems are very likely to be contaminated by anthropogenic activities. The objective of this study is to identify the presence of heavy metals in the sediments that will determine the suitability of these sediments for further environmental magnetic study. The results show that magnetic susceptibility varies from 58 to 3585 10- 8 m3/kg, while the frequency-dependent susceptibility is less than 3% indicating the predominance of ferromagnetic minerals. IRM analysis shows that all samples saturated in magnetic field of less than 200 mT suggesting the predominant mineral is magnetite (Fe3O4). Comparing magnetic measurements and chemical analyses, we found good correlation between magnetic susceptibility and concentration of Fe, Mn, Co, and Ti.

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