Pyroligneous Acids Enhance Phytoremediation of Heavy Metal-Contaminated Soils Using Mustard

Abstract

© 2017 Taylor & Francis. Heavy metal (HM) pollution has long been a problem in crop production. However, soils contaminated at low concentration such as areas for food production may have a high risk of biomagnification and food chain contamination. Different methods were used for remediating these polluted environments, but pyroligneous acids (PAs) such as wood vinegar (WV) application are rarely studied. Thus, the effects of WV on metal availability in soils and on the growth of mustard were evaluated by measuring chlorophyll content, biomass, nutrient and metal uptake. Bioconcentration factor (BCF) and translocation factor (TF) were computed to determine suitable phytoremediation practices. Overall results revealed favorable growth of mustard due to the direct source of nutrients provided by WV. WV decreased the metal concentration in soil and inhibited uptake through phytostabilization. Organic substances associated with WV are naturally endowed with adsorption sites available for chelation, rendering metals less bioavailable. As a result, HM-contaminated soils can now be utilized for food production.

Source or Periodical Title

Communications in Soil Science and Plant Analysis

ISSN

103624

Page

2061-2073

Document Type

Article

Subject

Bioconcentration factor, heavy metals, phytostabilization, pyroligneous acids, translocation factor

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