After doing heavy metal characterization, we try for removal. Among various techniques, which is the current thrust area for HM removal?
Please see in my "Cotributions" the full text of our article on LEAD AND CHILDHOOD.
Dear Selvaraju: you see, the most serious population health problems associated with HV are those connected with their accumulation in soils - ao how would you remove them with adsorption?
Dear Prof. and selvaraju. Shall we prefer processes which totally convert heavy metal in to non hazardous compounds?
I am afraid it is hardly possible. Different chemical species of a toxic metal can different in solubility, bioavailability, kinetics of migration, and in toxicity of course, but to convert it in something TOTALLY NON HAZARDOUS would be difficult even in a reactor, to say nothing about the Environment.
There are several treatment technologies available for soils that have elevated levels of HV. The technologies applicable to a particular HV site depend on the clean-up
goals, the form of the metal present, and the volume and physical chemical properties of HV-containing soils.
Despite the substantial number of remediation methods that now exist and have been
used to correct pollution, there is a compelling need for new and innovative technologies. Two of the driving forces for new technology are cost and efficiency. Any innovative remediation technology that could substantially reduces costs would remove one of the major obstacles for efficient remediation. The second driving force for new technology is the problem of finding an efficient method for remediating complex geological sites containing a number of chemicals.
I recommend Bioremediation and Phytoremediation.techniques which adopted the naturally occurring biodegradative processes to clean up contaminated sites.
Dear Boris Katsnelson, We will remove HM from soil using biochar technology.
Sure Mamdouh, those bio and phytoremediation processes can be the better bio processes.
Biosorption using the readily avalable plant parts is now a best remediation measure for most of the heavy metals effecting the human health. These are low cost material and high removal capacity for metals.
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