Magnetic properties and heavy metal content of sanitary leachate sludge in two landfill sites near Bandung,Indonesia |
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Authors: | Satria Bijaksana Estevanus Kristian Huliselan |
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Institution: | (1) Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Bandung, 40132, Indonesia |
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Abstract: | Magnetic properties and heavy metal content of landfill leachate sludge samples from two municipal solid waste disposal sites
near Bandung, West Java, Indonesia, and their correlation with heavy metals are studied in the present work. Leachate was
found to be sufficiently magnetic with mass-specific magnetic susceptibility that varies from 64.8 to 349.0 × 10−8 m3 kg−1. It is, however, less magnetic than the soils around the landfill sites. The magnetic minerals are predominantly pseudo-single
domain and multidomain magnetite. Leachate samples from the older but inactive disposal site, Jelekong, are found to be more
magnetic than that from Sarimukti, the younger and active site. The enhancement of leachate due to the soil-derived ferrimagnetic
particles is possibly the same for both Sarimukti and Jelekong. The fact that strong correlation between magnetic parameters
and heavy metals is observed in Jelekong but is absent in Sarimukti suggests that the use of magnetic measurement as a proxy
measurement for heavy metal content in leachate is plausible provided that the magnetic susceptibility exceeds certain threshold
value. Moreover, the accumulation of magnetic minerals and heavy metals in leachate might depend on the activity and the age
of landfill site. |
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