Two-level remediation method of heavy metal contaminated soil
A technology for contaminated soil and heavy metals, applied in the field of contaminated soil treatment, can solve the problems of unsatisfactory restoration of contaminated soil, achieve the effect of reducing the number of residues and improving soil quality
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0029] A method for secondary restoration of heavy metal contaminated soil, comprising the following steps:
[0030] (1) Break up a dry paddy field polluted by heavy metals, and break the soil at a depth of 0.5m on the surface to clods less than 2mm; irrigate until the accumulated water layer on the soil layer reaches a depth of 10cm; add light ceramsite-shaped improved The modified clay mineral adsorbent was mechanically stirred for 20 minutes and left to stand for 6 hours, and the adsorbent that had completed the adsorption was removed and the supernatant was discharged at the same time to complete the primary repair; the modified clay mineral adsorbent was Mongolian Lightweight ceramsite made of a mixture of destoned clay modified adsorbent, chitosan modified clay, bentonite modified clay, and phosphoric acid modified attapulgite, the pH value is 5, and the mixing ratio is 1:2 by volume: 1:1;
[0031] (2) Put the adsorbent that has completed adsorption taken out in step (1) ...
Embodiment 2
[0049] Remediation of contaminated soil in a suburb of the Pearl River Delta:
[0050] A method for secondary restoration of heavy metal contaminated soil, comprising the following steps:
[0051] (1) Break up a dry paddy field polluted by heavy metals, and break the soil at a depth of 0.55m on the surface to clods less than 2.5mm; irrigate until the accumulated water layer on the soil layer reaches a depth of 12.5cm; add light ceramsite The modified clay mineral adsorbent is mechanically stirred for 25 minutes, and left to stand for 7 hours, and the adsorbent that is floating on the water surface and completed the adsorption is taken out, and the supernatant is discharged at the same time to complete the primary repair; the modified clay mineral adsorbent Lightweight ceramsite made from a mixture of montmorillonite clay modified adsorbent, chitosan modified clay, bentonite modified clay and phosphoric acid modified attapulgite, the pH value is 6.5, and the mixing ratio is vol...
Embodiment 3
[0069] The experiment on a polluted land in the Pearl River Delta is as follows:
[0070] Remediation of contaminated soil in a suburb of the Pearl River Delta:
[0071] A method for secondary restoration of heavy metal contaminated soil, comprising the following steps:
[0072] (1) Break up a dry paddy field polluted by heavy metals, and break the soil at a depth of 0.6m on the surface to clods less than 3mm; irrigate until the water layer on the soil layer reaches a depth of 15cm; add light ceramsite modified The modified clay mineral adsorbent was mechanically stirred for 30 minutes and left to stand for 8 hours, and the adsorbent that had completed the adsorption was taken out and the supernatant was discharged at the same time to complete the primary repair; the modified clay mineral adsorbent was Mongolian Lightweight ceramsite made of a mixture of destoned clay modified adsorbent, chitosan modified clay, bentonite modified clay, and phosphoric acid modified attapulgite...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com