(ZA9501285-A)      A process for the decontamination of a medium comprising a material contaminated with organic and metal species comprises treating the body of the medium by a process which breaks down the organic contaminant(s) using microbial agents, followed by treatment with microbially produced H2SO4 to solubilise and leach the metal species as a metal sulphate and treating the leached metal sulphate by a bio-pptn. process which converts the sulphate to insoluble metal sulphide(s).    USE -   The process is esp. useful for the treatment of heavy metal contaminants and organic contaminants in bulk particulate material such as land or soil using biochemical processes. The metal species may comprise radioactive or toxic heavy metal species.    ADVANTAGE -   The process provides permanent soln. to the contamination problem and allows the simultaneous treatment of metal and organic contaminants. In-situ and ex-situ treatment systems may be used. The size of the secondary waste streams and hence the cost of dealing with them is minimised. The process minimises the use of harsh chemicals which could harm the environment and an opportunity to re-use certain metal contaminants is offered.    (JP9508854-W)      A process for the decontamination of a medium comprising a material contaminated with organic and metal species comprises treating the body of the medium by a process which breaks down the organic contaminant(s) using microbial agents, followed by treatment with microbially produced H2SO4 to solubilise and leach the metal species as a metal sulphate and treating the leached metal sulphate by a bio-pptn. process which converts the sulphate to insoluble metal sulphide(s).    USE -   The process is esp. useful for the treatment of heavy metal contaminants and organic contaminants in bulk particulate material such as land or soil using biochemical processes. The metal species may comprise radioactive or toxic heavy metal species.    ADVANTAGE -   The process provides permanent soln. to the contamination problem and allows the simultaneous treatment of metal and organic contaminants. In-situ and ex-situ treatment systems may be used. The size of the secondary waste streams and hence the cost of dealing with them is minimised. The process minimises the use of harsh chemicals which could harm the environment and an opportunity to re-use certain metal contaminants is offered.    (US5840191-A)      A process for the decontamination of a medium comprising a material contaminated with organic and metal species comprises treating the body of the medium by a process which breaks down the organic contaminant(s) using microbial agents, followed by treatment with microbially produced H2SO4 to solubilise and leach the metal species as a metal sulphate and treating the leached metal sulphate by a bio-pptn. process which converts the sulphate to insoluble metal sulphide(s).    USE -   The process is esp. useful for the treatment of heavy metal contaminants and organic contaminants in bulk particulate material such as land or soil using biochemical processes. The metal species may comprise radioactive or toxic heavy metal species.    ADVANTAGE -   The process provides permanent soln. to the contamination problem and allows the simultaneous treatment of metal and organic contaminants. In-situ and ex-situ treatment systems may be used. The size of the secondary waste streams and hence the cost of dealing with them is minimised. The process minimises the use of harsh chemicals which could harm the environment and an opportunity to re-use certain metal contaminants is offered.    (RU2133632-C1)      A process for the decontamination of a medium comprising a material contaminated with organic and metal species comprises treating the body of the medium by a process which breaks down the organic contaminant(s) using microbial agents, followed by treatment with microbially produced H2SO4 to solubilise and leach the metal species as a metal sulphate and treating the leached metal sulphate by a bio-pptn. process which converts the sulphate to insoluble metal sulphide(s).    USE -   The process is esp. useful for the treatment of heavy metal contaminants and organic contaminants in bulk particulate material such as land or soil using biochemical processes. The metal species may comprise radioactive or toxic heavy metal species.    ADVANTAGE -   The process provides permanent soln. to the contamination problem and allows the simultaneous treatment of metal and organic contaminants. In-situ and ex-situ treatment systems may be used. The size of the secondary waste streams and hence the cost of dealing with them is minimised. The process minimises the use of harsh chemicals which could harm the environment and an opportunity to re-use certain metal contaminants is offered.    (CN1146162-A)      A process for the decontamination of a medium comprising a material contaminated with organic and metal species comprises treating the body of the medium by a process which breaks down the organic contaminant(s) using microbial agents, followed by treatment with microbially produced H2SO4 to solubilise and leach the metal species as a metal sulphate and treating the leached metal sulphate by a bio-pptn. process which converts the sulphate to insoluble metal sulphide(s).    USE -   The process is esp. useful for the treatment of heavy metal contaminants and organic contaminants in bulk particulate material such as land or soil using biochemical processes. The metal species may comprise radioactive or toxic heavy metal species.    ADVANTAGE -   The process provides permanent soln. to the contamination problem and allows the simultaneous treatment of metal and organic contaminants. In-situ and ex-situ treatment systems may be used. The size of the secondary waste streams and hence the cost of dealing with them is minimised. The process minimises the use of harsh chemicals which could harm the environment and an opportunity to re-use certain metal contaminants is offered.