Development of De-toxicants of Combined Action on the Basis of Humic Substances and their Derivatives.

Country: Kazakhstan
Start Date:   1/2/2004         Duration: 48 months         Project Type: Other
Contract Number: 
Organisation Type:  Agency, regulator or other governmental or inter-governmental body
Contaminated land-->Contaminated land overview
Diffuse pollution-->Diffuse pollution overview
Project objectives:
– To obtain humic preparations enriched with ionogenic groups, chelating fragments and hydrophobic units using techniques of fractionation and chemical 
and microbiological modification. – To characterize structure and binding properties of the obtained humic preparations with respect to heavy metals and priority organic contaminants.
– To evaluate safety and adaptogenic activity of the obtained humic preparations using bioassays. – To evaluate detoxifying properties of the humic preparations obtained with respect to priority classes of ecotoxicants using bioassays and vegetation
experiments. – To scale-up technology for production of the humic preparations that showed the highest detoxidying efficiency and specificity in the lab experiments.
– To assemble the technological lines for production of the most efficient humic detoxicants including different commercial forms (powder, granulate,
solution) designed for different applications. – To conduct field experiments on detoxification of contaminated territories using the humic detoxicants produced.
Project Summary:
The goal of the project is to develop detoxicants of combined action on the basis of humic substances and their derivatives and to optimize the technology for 
their production. To reach the goal, the following objectives are set: Chemical pollution threatens greatly natural environments and can lead to the complete destruction of biogenosis. Effective detoxification of the contaminated
environments is a primary condition for successful rehabilitation of the damaged biogenosis. The success of detoxification depends greatly on the efficiency
of the detoxicants used. The latter is determined by the binding affinity of detoxicants for heavy metals and organic xenobiotica. The detoxifying effects
can be substantially strengthen if the detoxicants are able of adaptogenic activity displayed as an increase in resistance of living organisms to chemical
stress. Humic substances (HS) and their derivatives can be considered as very promising compounds for development of the detoxicants of the wanted combined action.
HS possess the properties of soil amendments, sorbents and antidotes. They do not expose toxic effects on biota. On contrary, HS are known to act as natural adaptogens
increasing the resistance of living organisms to non-specific stress factors. For industrial applications, of particular importance is an ease of modification
of HS and tremendous resources of the raw humic materials (brown coal, peat, and sapropel). Chemical and microbiological techniques can be applied for designing
HS-based products of the wanted properties. They can be enriched with ionogenic groups, chelating fragments or hydrophobic units. Depending on the kind of
modification, the obtained humic detoxicants can act as chelating agents, redox mediators, sorbents or flushing agents. Development of the HS based products
of the controlled properties is a prerequisite for their wide use in remediation technologies.
Achieved Objectives:

Product Descriptions:

Additional Information:

Project Resources:
Funding Programme(s): 
Link to Organisations:

International Science and Technology Center
Submitted by: Mr Sebastien Dakin  Who does what?  16/01/2008 13:53:00
Updated by: Mr Sebastien Dakin  Who does what?  16/01/2008 15:37:00