138results about How to "Rich surface functional groups" patented technology

The invention provides a soil chlorinated hydrocarbon remediation method based on modified zero-valent iron, comprising mixing activated carbon fibers and zero-valent iron, performing ball milling toobtain activated carbon fiber-modified zero-valent iron, adding the activated carbon fiber-modified zero-valent iron into chlorinated hydrocarbons contaminated soil, and allowing to react. Compared with existing mediation processes with zero-valent iron, the soil chlorinated hydrocarbon remediation method based on modified zero-valent iron has the advantages that the addition of active carbon fibers brings no reduction in the reaction activity of zero-valent iron to reduce trichloroethylene and other chlorinated hydrocarbons; natural hydrophobicity and good adsorption of the active carbon fibers enables the zero-valent iron to evidently increase the release rate of chlorinated hydrocarbons from soil, so that the problem is solved that hysteretic separation of chlorinated hydrocarbons causeproneness to remediation rebound; in addition, the activated carbon fiber-modified zero-valent iron helps greatly increase the selectivity of zero-valent iron on target contaminates to be removed, namely under equal conditions, upon the removal of equal chlorinated hydrocarbons, the consumption of the zero-valent iron is evidently reduced, and therefore, chemicals cost can be reduced and the quantity of zero-valent iron waste is reduced correspondingly.