Abstract

This study investigates the level of toxic trace elements (TTE) in the rhizosphere soil and tissues of five native plants and their phytoextraction/phytostabilization potential growing in Maharlu Lake wetland, in Southern Iran. The study anticipated by determination of 11 potentially TTE concentrations (As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, and Zn) in the soil, soil extract, and the plants’ dry matter (root and shoot). Pollution index (PI), pollution load index (PLI), bioconcentration factor (BCF), bioaccumulation coefficient (BAC), and translocation factor (TF) were applied in the study. Two main results were pointed out in this study. Firstly, the result of pollution indexing and total and phyto-availability concentrations of TTE showed that some of them in the rhizosphere soil are problematic in the Maharlu wetland, in particular for Mo, Pb, Zn, and As. Secondly, the result of the correlation coefficients and phytoremediation indexing revealed that TTE accumulation in the plant tissues, not only depends on the concentration in the soil extract but is also plant-specific. Moreover, the results suggested that Halopeplis sp. has the potential for phytoextraction of Cd and Mo in the contaminated wetlands.

Novelty statement: This manuscript addresses the toxic trace elements concentration in rhizosphere soil and tissues of five native plants and their phytoextraction/phytostabilization potential: Maharlu wetland in southern Iran.

摘要

本研究调查了伊朗南部马哈鲁湖湿地中生长的五种本土植物根际土壤和组织中的有毒微量元素 (TTE) 水平及其植物提取/植物稳定潜力。该研究通过测定土壤、土壤提取物和植物干物质（根和射击）。研究中应用了污染指数（PI）、污染负荷指数（PLI）、生物浓缩系数（BCF）、生物蓄积系数（BAC）和易位系数（TF）。本研究指出了两个主要结果。首先，TTE 的污染指数和总浓度和植物有效性浓度的结果表明，其中一些在 Maharlu 湿地根际土壤中存在问题，尤其是 Mo、Pb、锌和砷。其次，相关系数和植物修复指数的结果表明，植物组织中的 TTE 积累不仅取决于土壤提取物中的浓度，而且还具有植物特异性。此外，结果表明，Halopeplis sp . 具有在受污染的湿地中植物提取 Cd 和 Mo 的潜力。

新颖性声明：这份手稿涉及五种本地植物根际土壤和组织中的有毒微量元素浓度及其植物提取/植物稳定潜力：伊朗南部的马哈鲁湿地。