[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

The remediation of the lead-polluted garden soil by natural zeolite

J Hazard Mater. 2009 Sep 30;169(1-3):1106-11. doi: 10.1016/j.jhazmat.2009.04.067. Epub 2009 Apr 24.

Abstract

The current study investigated the remediation effect of lead-polluted garden soil by natural zeolite in terms of soil properties, Pb fraction of sequential extraction in soil and distribution of Pb in different parts of rape. Natural zeolite was added to artificially polluted garden soil to immobilize and limit the uptake of lead by rape through changing soil physical and chemical properties in the pot experiment under greenhouse conditions. Results indicated that the addition of natural zeolite could increase soil pH, CEC, content of soil organic matter and promote formation of soil aggregate. The application of zeolite decreased the available fraction of Pb in the garden soil by adjusting soil pH rather than CEC, and restrained the Pb uptake by rape. Data obtained suggested that the application of a dose of zeolite was adequate (>or=10 g kg(-1)) to reduce soluble lead significantly, even if lead pollution is severe in garden soil (>or=1000 mg kg(-1)). An appropriate dose of zeolite (20 g kg(-1)) could reduce the Pb concentration in the edible part (shoots) of rape up to 30% of Pb in the seriously polluted soil (2000 mg kg(-1)).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Brassica rapa / chemistry
  • Environmental Restoration and Remediation / methods*
  • Lead / isolation & purification*
  • Soil Pollutants / isolation & purification*
  • Zeolites / chemistry*

Substances

  • Soil Pollutants
  • Zeolites
  • Lead