Work

Chelate facilitated phytoextraction of Pb, Cd, and Zn from a lead–zinc mine contaminated soil by three accumulator plants

Year: 2023

Type: article

Abstract: This study aims to evaluate the enhancement of phytoextraction of heavy metals (Pb, Cd, and Zn) by speciesMarrubium cuneatum,Stipa arabica, andVerbascum speciosum, through EDTA amendment. Assisted phytoextraction pot experiments were performed at different EDTA dosages (0, 1, 3, and 5 mmol kg−1soil). The DTPA-extractable metal content increased in the presence of EDTA, followed by their contents in the tissues of all three studied species. Resulting from oxidative stress, the activity of antioxidant enzymes such as glutathione peroxidase (GPX), superoxide dismutase (SOD), and catalase (CAT) increased when the chelating agent was added. EDTA in higher doses partially decreased chlorophyll concentration, and 5 mmol kg−1of that reduced the biomass of the studied species. The bioconcentration factor (BCF) for Cd was notably high in all studied plants and considerably elevated for Zn and Pb with the addition of EDTA inM. cuneatumandS. arabica(BCF > 1), whilst an accumulation factor greater than one (AF > 1) was found for Cd in all species and for Pb in the case ofS. arabica. In general, the results demonstrated that EDTA can be an effective amendment for phytoextraction of Cd, Zn, and Pb byM. cuneatum,V. speciosumandS. arabicain contaminated soils.

Source: Scientific Reports

DOI: 10.1038/s41598-023-48666-5

Authors: Sadegh Hosseinniaee, Mohammad Jafari, Ali Tavili, Salman Zare, Giovanna Cappai

Institutions: University of Tehran, University of Cagliari

Language: English

Topic: Heavy metals in environment

Subfield: Pollution

Field: Environmental Science

Domain: Physical Sciences

SDG: Life on land

Open Access status: gold

Estimated APC paid: $2,390