Amb motiu del tancament d'estiu, la validació de documents es reprendrà a partir del 28 d'agost de 2026. Disculpeu les molèsties.
Con motivo del cierre de verano, la validación de documentos se reanudará a partir del 28 de agosto de 2026. Disculpad las molestias
Due to the summer closure, document validation will resume starting August 28, 2026. We apologize for any inconvenience.

Files

664795.pdf (1.04 MB)

Document type

Article

Version

Accepted version

Publication date

2016-06-10

Publication license

cc-by-nc-nd (c) Elsevier B.V., 2016
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/102744

Changes in heavy metal extractability from contaminated soils remediated with organic waste or biochar

Journal Title

Authors

Director/Tutor

Journal ISSN

Volume Title

Related resource

http://dx.doi.org/10.1016/j.geoderma.2016.06.010

Abstract

The effect of the addition of organic waste or biochar on the extractability of heavy metals (Cd, Cu, Ni, Pb and Zn) was assessed in five heavy metal-contaminated soils. The amendments studied were: municipal organic waste compost (MOW), green waste (GW), biochar derived from tree bark (BF) and biochar derived from vine shoots (BS). The amendments were added to the soil at 10% dose. A pHstat leaching test was applied to the soils and soil + amendment mixtures to assess the effects of the amendments on the extractable metal concentration at the initial pH and in the 2-12 pH range. MOW increased the DOC content in the mixtures for most soils, whereas the rest of amendments only increased the DOC content for the soil with the lowest DOC value. Moreover, in the mixtures obtained from soils with a low buffering capacity, the amendments increased pH (up to 3 units) and the acid neutralization capacity, thus decreasing the extractability of heavy metals at the initial pH of the mixtures. In a few cases, the amendments further decreased the concentrations of extractable metal due to an increase in the sorption capacity of the mixture, even though the soil had high initial pH and ANC values. MOW and GW generally led to larger decreases in metal extractability in the resulting mixtures than biochar, due to their higher sorption and acid neutralization capacities.

Subject

Contaminació dels sòls, Metalls pesants, Bioremediació, Compostos orgànics

Subject (English)

Soil pollution, Heavy metals, Bioremediation, Organic compounds

Citation

Collections

Articles publicats en revistes (Enginyeria Química i Química Analítica)

Citation

VENEGAS SEPÚLVEDA, Andrea, RIGOL PARERA, Anna and VIDAL ESPINAR, Miquel. Changes in heavy metal extractability from contaminated soils remediated with organic waste or biochar. Geoderma. 2016. Vol. 279, num. 132-140. ISSN 0016-7061. [consulted: 19 of August of 2026]. Available at: https://hdl.handle.net/2445/102744

Export metadata

JSON - METS

Share record