Ornamental hyperaccumulator Mirabilis jalapa L. phytoremediating combine contaminated soil enhanced by some chelators and surfactants.

Environmental Science and Pollution Research International
Shu-He WeiYahu Hu

Abstract

Mirabilis jalapa L. is an ornamental plant of the composite family, which was found hyperaccumulating Cd. Due to its larger biomass, developed root system, root exudation, and microbial interactions, certain organic pollutants in its rhizosphere can be effectively degraded. Thus, M. jalapacan be used to co-remediate heavy metal and organic pollutant co-contaminated soil. The aim of this paper is to explore the remediation capacity of M. jalapa for Cd-PAHs co-contaminated soil in the presence of five chelators or surfactants. The concentrations of Cd and PAHs in collected soil samples were 0.85 mg kg-1 Cd and 1.138 mg kg-1 PAHs (16 kinds of priority control polycyclic aromatic hydrocarbons by USEPA). The chelators or surfactants of EDTA, EGTA, CA, TW80, and SA were respectively spiked to the pots according to the experiment design at 1 month before the plant harvested. The results showed that the capacity of Cd in shoot of M. jalapa was 7.99 μg pot-1 without any addition (CK4, M. jalapa in original soil without amendment). However, Cd capacity in shoot of M. jalapa was increased (p < 0.05) by 31.7%, 181.7%, and 107.4% in treatment of REGTA, RCA and REGTA + SA, respectively. As for the degradation of PAHs in soil, there was no si...Continue Reading

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Citations

Jan 27, 2020·Environmental Science and Pollution Research International·Qinchun LiChunyu Zhang
Apr 5, 2020·Environmental Science and Pollution Research International·Runzhang ZuoYingping Huang
Feb 5, 2021·Environmental Research·Aqib Hassan Ali KhanSohail Yousaf

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