Immobilization of soil mercury by colloidal sulphur in the laboratory experiment |
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| Authors: | Fyodor S Kot Vladimir L Rapoport Galina V Kharitonova |
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| Institution: | (1) Agricultural Experimental Center, Department of Civil and Environmental Engineering, Technion-Israel Institute of Technology, Haifa, 32000, State of Israel;(2) Institute for Tectonics and Geophysics, Far East Branch of the Russ. Ac. Sci., 65 Kim Yu Chen St., Khabarovsk, 680000, Russian Federation;(3) Institute of Water and Ecological Problems, Far East Branch of the Russ. Ac. Sci., 65 Kim Yu Chen St., Khabarovsk, 680000, Russian Federation |
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| Abstract: | The results of the laboratory pot experiments on soil mercury (Hg) immobilisation with a non-toxic and price-reasonable agent
— colloidal sulphur (S) water suspension, are presented. It was shown that fertilisation with small agrochemical doses of
colloidal S reduces excess Hg effectively as follows: in interstitial waters by a factor 2 – 12 times for total Hg, and 22–
680 times for “reactive” Hg; in stems and leaves of oats – 7 – 22 times; and in moss bags, reflecting soil Hg degassing, 7
– 15 times, for the most heavily Hg-spiked soils. The results obtained allowed to conclude that the immobilization of Hg occurs
through Hg binding to the newly formed S-bearing functional groups in humic acids and/or sulphides.
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| Keywords: | Mercury pollution soil colloidal sulphur immobilisation laboratory pot experiment |
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