Abstract

An excessive amount of metals is toxic to plants, animals, and humans. The present study focuses on the efficacy of three local emergent aquatic plants; Veronica anagallis-aquatica L.; Mentha longifolia L. (Hudson) and Cyperus iria L. and one free-floating; Nasturtium officinale R. Br. for removal of metals (Fe, Pb, Zn, Cu, Mn, and Ni) from the wastewater, in outdoor sand pot experiments. The particular phytoremediation mechanisms were also investigated. The selected plants adapted and properly grew, as determined by their high biomass production and survival rate. Emergent plants (V. anagallis-aquatica and C. iria) accumulated high quantities of Fe, Cu, Ni, and Mn in roots (bioaccumulation factor for roots, BAF_root >1 and translocation factor, TF <1), therefore credited as strong excluders. The highest concentration of Fe was taken up by C. iria (>1000 mg/plant root), BAFs > 1, and TF < 1, and the revealed mechanism was phytostabilization. Mentha longifolia accumulated similar patterns of Zn in shoots and roots (BAFs >1 and TF >1), the involved mechanism was phytoextraction. Free-floating N. officinale showed the highest percentage of metal uptake and removal capacity for Pb (∼60% and ∼10 mg/d/g, respectively). Synergetic and plant genetic abilities need to be optimized to develop commercially useful practices.

抽象的

过量的金属对植物，动物和人类有毒。本研究的重点是三种本地紧急水生植物的功效。Veronica anagallis-aquatica L .; Mentha longifolia L.（Hudson）和Cyperus iria L.和一只自由漂浮的；金莲花（Nasturtium officinale R.Br.）在室外砂锅实验中用于去除废水中的金属（铁，铅，锌，铜，锰和镍）。还研究了特定的植物修复机制。选定的植物适应并适当生长，这取决于它们的高生物量产量和成活率。新兴植物（V. anagallis-aquatica和C. iria）在根部积累了大量的Fe，Cu，Ni和Mn（根部的生物累积因子，BAF_根> 1和易位因子，TF <1），因此被认为是强排阻剂。铁的最高浓度被铁丝虫吸收（> 1000 mg /植物根），BAFs> 1，TF <1，并且揭示的机理是植物稳定作用。薄荷叶在茎和根中积累了相似的锌形态（BAFs> 1和TF> 1），其参与机制是植物提取。自由浮动的西洋菜表明的金属吸收和去除能力对Pb的最高百分比（〜60％和〜10毫克/ d / g时，分别地）。需要优化协同和植物遗传能力，以开发商业上有用的做法。