Fractionation of Metals in Soil Surrounded Gold Mine at Phichit Province Using a Continuous-flow Sequential Extraction

Atitaya Samontha, Thitipan Pinidanantachai

Abstract


Fractionation of metals is the important information to predict the mobility and bioavailability of metals in the environment. These data is used to estimate the degree of metals contamination. The main purpose of this study is to investigate the fractionation of Aluminium (Al), Cadmium (Cd), Copper (Cu), Iron (Fe), and Zinc (Zn) in soil surrounded gold mine at Phichit province using a continuous-flow sequential extraction. A five-stage sequential extraction procedure was performed to compare various fractions of these metals in different soil sample. These results showed that mostly metals at different direction and distancewere from natural source except Cu, Fe, and Zn in soil at the route of L1-L3-L10. Their enrichment factor was higher than 1 indicating the anthropogenic source from human activity. Furthermore the fractionation of five metals except Zn could be divided into two groups affecting by transportation of gold mine. Considering Cu and Fe distribution, Cu fractionation at L1, L3, and L10 was contributed in water soluble and exchangeable phase whereas it was mostly occurred in oxidizable phase at R1, R3, R10, and C100. Therefore Cu at L1, L3, and L10 was more potentially labile into environment than others.However Fe fraction of both groups was mainly associated in residue phase indicating immobile or very stable.


Keywords


Fractionation, Metals, Soil, Gold mine, Continuous-flow sequential extraction

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SCIENCE  AND  TECHNOLOGY  RMUTT  JOURNAL
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