Heavy metals fractionation before, during and after composting of sewage sludge with natural zeolite

Antonis A. Zorpas, Vassilis J. Inglezakis, Maria Loizidou

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

The main limiting factor, in order to use compost in agriculture, is the total concentration of heavy metals. Natural zeolites, such as clinoptilolite, have the ability to take up and remove those metals by utilizing ion exchange. However, it is important to know about the fractionation of the heavy metals during the thermophilic phase and the maturation phase. The purpose of this work was to determine the changes in the fraction of heavy metals in sewage sludge compost in which clinoptilolite is used as a bulking agent to remove metals. The final result indicates that a significant (p < 0.05) percentage of the metals, which is not removed by the zeolite, is associated with the residual fraction which is considered as an inert form.
Original languageEnglish
Pages (from-to)2054-2060
Number of pages7
JournalWaste Management
Volume28
Issue number11
DOIs
Publication statusPublished - 30 Nov 2008

Keywords

  • zeolites
  • heavy metals
  • clinoptilolite

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