Method and device for extracting heavy metal ions from soil

Abstract

The invention relates to a method and a device for extracting heavy metal ions from soil, which are used for extracting heavy metal ions from the heavy metal polluted oil. The method comprises the following steps of: forming a heavy metal ion adsorbent by adopting a compound containing carbon nano fibers, active carbon, a cationic surface active agent, acrylamide, potassium acrylate, sludge particles and potassium sulfide; putting the heavy metal ion adsorbent in a porous hard shell to form a porous hard plastic bag; and embedding the porous hard plastic bag into soil for extracting the heavy metal ions. The method and the device for extracting the heavy metal ions from soil aim at the problem of severe pollution of Cd, Cr, Cu, Hg, Pb and Zn of the soil and can effectively absorb, passivate, solidify and extract active ions such as Cd2+, Cr3+, Cu 2+, Hg2+, Pb2+, Zn2+, and the like in plow layers of the soil, maintain microzone water of the soil, release a certain K+ ions and realize the update, the purification and the circular treatment of the absorbent in the device for extracting the heavy metal ions.

Description

technical field [0001] The invention belongs to the environmental pollution control technology, and in particular relates to a method and a device capable of effectively extracting toxic heavy metal ions in soil cultivation layers. Background technique [0002] At present, in view of the prevalence and severity of soil heavy metal pollution, some developed countries have formulated corresponding soil remediation plans. The U.S. federal government has formulated a soil and groundwater remediation plan, and plans to invest tens of billions to hundreds of billions of dollars. In 1994, the United States initiated and established the "Global Soil Remediation Network (Global Soil Remediation Network)". [0003] Throughout the research on remediation of soil heavy metal pollution at home and abroad, traditional heavy metal contaminated soil treatment mainly uses physical or chemical methods such as soil solidification, vitrification, leaching, soil washing, guest soil method, and ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the serious pollution of soil Cd, Cr, Cu, Hg, Pb and Zn, and provides a method and device for extracting heavy metal ions from soil, which can effectively absorb-passivate-solidify-extract soil tillage Active Cd in layer 2+ 、Cr 3+ 、Cu 2+ , Hg 2+ , Pb 2+ and Zn 2+ Plasma, and can maintain soil micro-domain moisture, and release a certain amount of K + ions, and can realize the renewal, purification and recycling treatment of the absorbent inside the heavy metal ion extraction device