Magnetic susceptibilities of groundwater samples from antique hand pumps in Tainan, Taiwan
© Lewis Charles, Chia-Jung Chang, Sue J. Lin
Mass specific magnetic susceptibilities (X) of 24 groundwater
samples collected from 12 antique pump wells in Tainan,
Taiwan, were analyzed with a Bartington MS2 susceptibility unit to determine the levels (if any) of magnetic
pollution. Compared to the susceptibility of "pure" water (-0.009µm3 kg-1) all pumped samples were found to be
similarly diamagnetic, with susceptibilities ranging from -0.009 to -0.014µm3kg-1 (mean=X-0.012µm3kg-1),
indicative of negligible magnetic contamination to the aquifer.
The application of the geophysical magnetic susceptibility tool as a first-order discriminante of possible groundwater
contaminants, such as iron and other magnetic substances, may sometimes prove more economical than costly
water analyses. <<back |
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