Format

Send to:

Choose Destination
See comment in PubMed Commons below
Sci Total Environ. 2014 Jan 15;468-469:598-608. doi: 10.1016/j.scitotenv.2013.08.072. Epub 2013 Sep 20.

Elements uptake by metal accumulator species grown on mine tailings amended with three types of biochar.

Author information

  • 1Department of Agriculture and Environmental Sciences, University of Udine, Via delle Scienze 208, I-33100 Udine, Italy. Electronic address: guido.fellet@uniud.it.

Abstract

Mine tailings are of great concern due to the risk their toxic inorganic elements pose to the environment. The application of biochar as an amendment may be a solution to reduce the risk of pollutant diffusion. The main purpose of the research was to verify the effects of different types of biochar produced from different feedstocks (pruning residues, fir tree pellets and manure pellets) on changing the substrate conditions to promote plant growth for the phytostabilization of mine tailings. The SEM/EDX characterization showed different structures in terms of porosity and granulosity as well as the element composition. The plants used in the pot experiment were Anthyllis vulneraria subsp. polyphylla (Dc.) Nyman, Noccaea rotundifolium (L.) Moench subsp. cepaeifolium and Poa alpina L. subsp. alpina. The biochars were applied at three doses: 0, 1.5 and 3%dw. Although to different extents, the biochars induced significant changes of the substrates in terms of pH, EC, CEC and bioavailability of the metals. The biochar from manure pellets and pruning residues reduced shoot Cd and Pb accumulations. The former also led to a higher biomass production that peaked at the1.5% dose. Biochar has great potential as an amendment for phytoremediation but its effects depend on the type of feedstock it derives from. The characteristics of the substrate to be treated are crucial for the biochar selection.

© 2013.

KEYWORDS:

Biochar; Heavy metals; Mine tailings; Phytostabilization; SEM/EDX

PMID:
24056450
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk