Ads
related to: remediation techniques for metal removal and recycling
Search results
Results From The WOW.Com Content Network
Environmental remediation is the cleanup of hazardous substances dealing with the removal, treatment and containment of pollution or contaminants from environmental media such as soil, groundwater, sediment. [1] Remediation may be required by regulations before development of land revitalization projects.
Precipitation is the selective removal of a compound of the targeted metal or removal of a major impurity by precipitation of one of its compounds. Copper is precipitated as its sulfide as a means to purify nickel leachates. Cementation is the conversion of the metal ion to the metal by a redox reaction. A typical application involves addition ...
Electrokinetic remediation, also termed electrokinetics, is a technique of using direct electric current to remove organic, inorganic and heavy metal particles from the soil by electric potential. [ 1 ] [ 2 ] [ 3 ] The use of this technique provides an approach with minimum disturbance to the surface while treating subsurface contaminants .
Removal can be accomplished with biosorption techniques. It is an alternative to using man-made ion-exchange resins , which cost ten times more than biosorbents. [ 17 ] The cost is so much less, because the biosorbents used are often waste from farms or they are very easy to regenerate, as is the case with seaweed and other unharvested biomass.
The surface reactions take three different forms: direct reduction, electron shunting through ferrous iron, and reduction by production and reaction of hydrogen. Pathway A represents direct electron transfer (ET) for Fe 0 to the adsorbed halocarbon (RX) at the metal/water point of contact, resulting in dechlorination and production of Fe 2+.
In situ chemical oxidation (ISCO), a form of advanced oxidation process, is an environmental remediation technique used for soil and/or groundwater remediation to lower the concentrations of targeted environmental contaminants to acceptable levels.
Ads
related to: remediation techniques for metal removal and recycling