Native plant species growing on the abandoned Zaida lead/zinc mine site in Morocco: Phytoremediation potential for biomonitoring perspective.

This study aims to assess the level of metal contamination and the ecological risk index at the abandoned Zaida Pb/Zn mining site in eastern Morocco and identify native plant species found on the site that can be used in site rehabilitation through phytoremediation strategies. Samples from seven native and abundant plant species at the site, along with their rhizospheric soils, were collected and analyzed using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) to determine the concentrations of various metal(loid)s, including As, Cu, Ni, Cd, Sb, Zn, and Pb. Indicators of soil pollution and ecological risks were also assessed, including the enrichment factor (EF), pollution index (PI), and ecological risk index (ERI).

Tetra-nuclear copper(II) complex of 2-hydroxy-,'-bis-[1-(2-hy-droxy-phen-yl)ethyl-idene]-propane-1,3-di-amine.

The title mol-ecular structure, namely, (μ-acetato)(μ-acetato)-bis-(μ-1,3-bis-{[1-(2-oxidophen-yl)ethyl-idene]amino}-propan-2-olato)tetra-copper(II) monohydrate, [Cu(CHNO)(CHCO)]·HO, corresponds to a non-symmetric tetra-nuclear copper complex. The complex exhibits one ligand mol-ecule that connects two copper Cu metal centres its ethano-lato oxygen anion acting in a μ-mode and one ligand mol-ecule that connects three copper Cu metal centres its ethano-lato oxygen anion acting in a μ-mode. One bridging acetate group acting in an η:η-μ-mode connects two copper(II) ions while another bridging acetate group connects three copper(II) ions in an η:-η-μ-mode.