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Factors Influencing the Volatilization of Mercury from Soil¹

ABSTRACT

Mercury volatilization from soils amended to 1 ppm mercury with mercuric nitrate decreased substantially within 1 week after application. During the first week, 20% of the applied mercury was lost from a silty clay-loam soil and 45% was lost from a loamy sand soil. Volatilization of Hg from the loamy sand soil resulted in a concurrent decrease in ammonium nitrate-extractable mercury. Other work with sterile soil indicates that the volatilization was mediated by microorganisms.

Key Words: Hg²⁰³ • mercuric nitrate • soil texture • microorganisms • extractable and nonextractable Hg

¹ Contribution from the Environ. Monit. Support Lab., Off. of Res. and Dev., USEPA, Las Vegas, NV 89101.

² Soil Microbiologist and Plant Physiologist, respectively.

Received for publication July 8, 1978.