Format

Send to

Choose Destination
Int J Phytoremediation. 2018 Jun 7;20(7):643-649. doi: 10.1080/15226514.2017.1365352.

The effect of olive husk extract compared to the edta on Pb availability and some chemical and biological properties in a Pb-contaminated soil.

Author information

1
a Department of Soil Science , Faculty of Agriculture, Ferdowsi University of Mashhad , Mashhad , Iran.
2
b Department of Agronomy and Plant Breeding , College of Agriculture, University of Birjand , Birjand , Iran.

Abstract

It was found that using chelating agents increases the efficiency of heavy metal extraction, however, they may have negative effects on soil ecosystem quality. A pot experiment was conducted in a completely randomized design with three replications in order to evaluate the effect of EDTA and Olive Husk Extract (OHE) on some chemical and biological properties of the Pb-contaminated soil. The experimental treatments included EDTA (2 g Na2EDTA salt per kg soil), OHE (2 g TDS of OHE per kg soil) and control (without the chelating agent). The results revealed that the EDTA and OHE treatments increased the Pb availability by 17.7% and 5.5% in comparison to the control treatment, respectively. Although EDTA was more effective in increasing the Pb availability but decreased the soil biological quality index (SBQI). The EDTA treatment significantly decreased the dehydrogenase (DH) activity and germination index (GI). The OHE application significantly increased the available-P, available-K, total N and organic carbon content by 339.92%, 40.79%, 20.9%, and 29.7% compared with control treatment, respectively. Furthermore, OHE considerably increased SBQI from 18.96 to 53.48. Compared to the control treatment higher values of soil respiration activity, DH activity, and carbon availability index (CAI) were observed in OHE treatment.

KEYWORDS:

Chelating agent; Pb availability; dehydrogenase activity; olive husk extract; soil respiration

PMID:
29039991
DOI:
10.1080/15226514.2017.1365352
[Indexed for MEDLINE]

Supplemental Content

Loading ...
Support Center