Journal of Soils and Sediments

, Volume 14, Issue 10, pp 1753–1765

Application of a plant bioassay for the evaluation of ecotoxicological risks of heavy metals in sediments affected by mining activities

  • Mari Luz García-Lorenzo
  • María José Martínez-Sánchez
  • Carmen Pérez-Sirvent
SEDIMENTS, SEC 1 • SEDIMENT QUALITY AND IMPACT ASSESSMENT • RESEARCH ARTICLE

DOI: 10.1007/s11368-014-0942-0

Cite this article as:
García-Lorenzo, M.L., Martínez-Sánchez, M.J. & Pérez-Sirvent, C. J Soils Sediments (2014) 14: 1753. doi:10.1007/s11368-014-0942-0

Abstract

Purpose

The objective of this work was to evaluate the effectiveness of a plant bioassay (Phytotoxkit®) for screening ecotoxicological risks in sediments affected by mining activities.

Materials and methods

A total of 42 sediment samples affected by mining activities were studied, including 39 sediment samples from the Sierra Minera, Spain, an area affected by old extraction procedures, and three sediments from an area affected by opencast mining. These three samples were then mixed with limestone filler at 10, 20 and 30 %, providing nine stabilised samples. The total and soluble metal(loid) content (As, Cd, Cu, Fe, Pb and Zn) was determined in all samples, and the Phytotoxkit® bioassay was applied to determine the ecotoxicological effect of this procedure.

Results and discussion

The stabilised material had a neutral pH and low soluble metal(loid) concentration, similar to that of samples in which a natural attenuation process had taken place because of mixing with surrounding carbonate-rich materials. An ecotoxicological survey identified the low toxicity levels of the stabilised samples.

Conclusions

The applied bioassay is a good tool for screening metal(loid) contamination in areas affected by mining activities, since it provides information on both natural and simulated attenuation processes. The mixing of sediments with limestone filler could be applied to the remediation of zones affected by mining activities, because the toxicological effect on the tested organisms in the stabilised sediments was reduced significantly and the metal(loid) content was diminished.

Keywords

Ecotoxicity Environmental risk Immobilisation Limestone filler Metal(loid)s Mining activity 

Supplementary material

11368_2014_942_MOESM1_ESM.doc (124 kb)
ESM 1(DOC 124 kb)

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Mari Luz García-Lorenzo
    • 1
  • María José Martínez-Sánchez
    • 2
  • Carmen Pérez-Sirvent
    • 2
  1. 1.Department of Petrology and Geochemistry, Faculty of GeologyUniversity Complutense of MadridMadridSpain
  2. 2.Department of Agricultural Chemistry, Geology and Pedology, Faculty of ChemistryUniversity of MurciaMurciaSpain