Fate and transport of metal trace elements from phosphogypsum piles in Tunisia and their impact on soil bacteria and wild plants

Ecotoxicology and Environmental Safety
Jihen JalaliThierry Lebeau

Abstract

The phosphate industry in Tunisia generates large amounts of phosphogypsum (PG) with more than 107 t per year. Environmental impact of this solid waste was studied. Cd, Ce, La, Nd, Sr and Y were analyzed from soils near PG stockpiles (Sfax and M'dhilla) and sediments from marine discharge (Gabes). Their impacts on the bacterial community structure and wild plants were investigated. Metal trace elements (MTE) concentrations (in mg Kg-1 DM) were much higher in contaminated soil than in the control (at 12 km from PG stockpiles). Highest concentrations were recorded in top soil and decreased with depth. A low bacterial diversity was shown (impacted by plants more than by MTE). The MTE concentrations in aerial parts (AP) and roots varied according to the plant species and were higher in contaminated sites. Sr, La and Cd in the AP ranged 33.10-657.56, 2.22-11.05 and 0.21-14.20 mg Kg-1 DM respectively. Plants exhibiting the maximal metal concentrations in AP (in mg Kg-1 DM) were the following: Zygophylum album for Sr (657.56) >Zygophylum album for Cd (14.20) >Zygophylum album (11.05) for La >Conyza canadensis (1.11) for Ce >Conyza canadensis (0.75) for Nd >Arthrocemum inducum (0.72) for Y. Kochia indica showed the highest bioconcentra...Continue Reading

Citations

Feb 24, 2020·Environmental Science and Pollution Research International·Jonghoon Kang, Albert M Kang
Nov 21, 2020·Environmental Geochemistry and Health·Imen Ben ChabchoubiOlfa Hentati
Jan 5, 2021·Environmental Science and Pollution Research International·Ting LuGuansen Cao
Jan 14, 2021·International Journal of Phytoremediation·Khaoula Ben Atia ZrougaFaiza Khebour Allouche
Mar 24, 2021·Environmental Science and Pollution Research International·Jean-Yves CornuThierry Lebeau

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