Iron-based nano material for in-situ remediation of heavy metal polluted underground water as well as preparation method and application of iron-based nano material

Abstract

The invention provides an iron-based nano material for in-situ remediation of heavy metal polluted underground water as well as a preparation method and application of the iron-based nano material, and belongs to the technical field of underground water pollution treatment. The iron-based nano material is prepared from nano zero-valent iron, nano ferroferric oxide, an antioxidant and activated carbon, and the mass ratio of the nano zero-valent iron to the nano ferroferric oxide to the antioxidant to the activated carbon is 10: (1.5-2.5): (3-7): (3-7). By adopting the iron-based nano material provided by the invention, the problems that the nano zero-valent iron is easy to oxidize and agglomerate and the magnetism is weakened are solved.

Description

technical field

[0001] The invention belongs to the technical field of groundwater pollution control, and in particular relates to an iron-based nanomaterial for in-situ repair of heavy metal-contaminated groundwater and a preparation method and application thereof. Background technique

[0002] The main difficulties in the remediation of heavy metal-contaminated groundwater: (1) The water flow is large, and it is difficult to meet the requirements by using the common ex-situ treatment method of wastewater; (2) Compared with ordinary sewage, the heavy metal content in groundwater is low, generally at 1mg / within L. The use of common methods is large and the cost is high. (3) Most of the groundwater flows in complicated directions, and it is difficult to effectively treat it with traditional in-situ remediation methods, and the treated waste residue is difficult to recover. And leaving the ground will cause heavy metal pollution to continue and repeat.

[0003] The advanta...