2 1 83
Home About us MoEF Contact us Sitemap Tamil Website  
About Envis
Whats New
Microorganisms
Research on Microbes
Database
Bibliography
Publications
Library
E-Resources
Microbiology Experts
Events
Online Submission
Access Statistics

Site Visitors

blog tracking


 
Chemosphere
Vol. 119, 2015, Pages: 190198

Viability of organic wastes and biochars as amendments for the remediation of heavy metal-contaminated soils

A. Venegas, A. Rigol, M. Vidal

Departament de Química Analítica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.

Abstract

Composts derived from municipal (MOW and MSW) and domestic wastes (DOM), wastes from the olive oil industry (OWH and OP), green waste (GW), and biochars (BF and BS) were investigated to test their viability for remediating metal-contaminated soils. In addition to common analyses, the characterisation included structural analyses (FTIR and 13C NMR), determination of the acid neutralisation capacity (ANC) and the construction of sorption isotherms for target metals (Pb, Zn, Cd, Ni and Cu). MOW and GW had the highest ANC values (4280 and 7100 meq kg-1, respectively), and MOW, GW, DOM, BF and BS exhibited the highest solid–liquid distribution coefficients (Kd) with maximum values in the 104 L kg-1 range. Sorption isotherms were fitted using linear and Freundlich models for better comparison of the sorption capacities of the materials. Based on their basic pH, high ANC and high sorption capacity, MOW, GW and biochars are the most promising materials.

Keywords: Heavy metals; Biochars; Organic materials; Immobilisation; Sorption isotherms.


 
Copyright © 2005 ENVIS Centre ! All rights reserved
This site is optimized for 1024 x 768 screen resolution