Economic and Environmental Geology

Fig. 1.

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Fig. 1. Concentration of arsenic in soil by aqua-regia digestion and sequential extraction. (a) Okdong, (b) Buguk.
Econ. Environ. Geol. 2022;55:209-17 https://doi.org/10.9719/EEG.2022.55.2.209
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