Department of Biology and Physiology of Organisms, Laboratory of Plant Physiology, Faculty of Biological Sciences, USTHB, Bab Ezzouar, 16011, Algiers, Algeria.
Renewable Energy Development Center, BP. 62, Route de l'observatoire Bouzareah, 16340, Algiers, Algeria.
Environ Sci Pollut Res Int. 2020 Aug;27(24):30133-30144. doi: 10.1007/s11356-020-08833-x. Epub 2020 May 24.
Selection of plant species with a great remediating capacity and a high biomass production is an important step for depolluting soils especially mine soils. Hyperaccumulators are used in phytoextraction for extracting metals from soil to roots and to translocate them to aerial parts. While in phytostabilization that usually requires amendment, metals are accumulated in the plant roots. The purpose of this study is to investigate Oxalis pes-caprae L. tolerance to Pb and As from Pontgibaud mine soil in France amended with compost and/or biochar. Oxalis bulbils were harvested in three sites located around Algiers: (1) an agricultural land in Reghaïa, (2) an area planted with Pines at the USTHB university campus, and (3) the polluted bank of the El Harrach river. The small and medium bulbil sizes were selected from each locality. Concerning the experimental soil, five mixtures of Pontgibaud technosol (P) with amendments compost (C) and biochar (Bc) were prepared: PC, PBc5, PBc10, PBc5 C, PBcC (w/w). The results indicate that amendments alter the soil physico-chemical characteristics and the mobility of metal(loid)s. They also reveal that As and Pb are differently distributed in plant organs. Medium bulbils especially from El Harrach river and the university campus have shown a better growth. Seedlings growth rate has been the highest in Pontgibaud amended with PC and the lowest in PBc10.
选择具有强大修复能力和高生物量生产能力的植物物种是净化土壤，特别是矿山土壤的重要步骤。超富集植物被用于植物提取，从土壤中提取金属到根部，并将其转运到地上部分。而在植物稳定化中，通常需要添加改良剂，金属则在植物根部积累。本研究旨在调查法国蓬蒂加布（Pontgibaud）矿区土壤中添加堆肥和/或生物炭后，酢浆草（Oxalis pes-caprae L.）对 Pb 和 As 的耐受性。酢浆草球茎在阿尔及尔周围的三个地点进行收获：（1）雷加伊（Reghaïa）的农业用地，（2）USTHB 大学校园种植的松树区，（3）污染的埃尔哈拉克（El Harrach）河沿岸。从每个地点选择小和中等大小的球茎。关于实验土壤，制备了蓬蒂加布技术土壤（P）与堆肥（C）和生物炭（Bc）的五种混合物：PC、PBc5、PBc10、PBc5 C、PBcC（w/w）。结果表明，改良剂改变了土壤的物理化学特性和金属（类）的迁移性。它们还表明，As 和 Pb 在植物器官中的分布不同。特别是来自埃尔哈拉克河和大学校园的中型球茎表现出更好的生长。Pontgibaud 中添加 PC 的幼苗生长速度最高，添加 PBc10 的幼苗生长速度最低。
