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Removal of mercury from mercury-contaminated sediments using a combined method of chemical leaching and volatilization of mercury by bacteria |
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| Authors: | Kunihiko Nakamura Megumi Hagimine Masashi Sakai Kensuke Furukawa |
| Affiliation: | (1) Department of Basic Medical Sciences, National Institute for Minamata Disease, Minamata, Kumamoto, 867-00081, Japan;(2) CREST (Core Research for Evolutional Science and Technology) of the Japan Science and Technology Corporation, Japan;(3) Department of Industrial Chemistry, Faculty of Engineering, Kyushu Sangyou University, Fukuoka, 813-0011, Japan;(4) Department of Agricultural Chemistry, Kyushu University, Fukuoka, 812-8581, Japan |
| Abstract: | A method for the removal of mercury sulfide frommercury-contaminated sediments was developed, whichconsists of chemical leaching and volatilization ofmercury by bacteria. More than 85% of the mercury insediment containing 0.11–37.4 mg/kg of mercury wasefficiently extracted with 3 M HCl and 74 mMFeCl3. Subsequent volatilization by bacteriaresulted in the removal of 62.9–75.1% of mercury frommercury-contaminated Minamata Bay sediments. Methylmercury was also eliminated from soil at a highefficiency. Thus, this combined method of chemicaland microbial treatments could be used for efficientremoval of both organic and inorganic mercurials fromnatural sediments. |
| Keywords: | Mercury mercury sulfide mercury-volatilizing bacteria Minamata Bay |
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