目前,减轻金属污染是矿山开垦的关键问题。的确,矿山废物通常在露天垃圾场中处置,因此污染物会分散在周围地区。在这项研究中,Helichrysummicrophyllum亚种的潜在用途。在非原位条件下评估了用于植物稳定的tyrhenicum。随机选择90个标本,并种植在三个基质中(参考基质,矿山废料,和用堆肥开采废物)。基材的矿物学组成,根际,和根通过X射线衍射(XRD)进行评估。Zn,Pb,和底物的Cd浓度,根际,土壤孔隙水,并测定了植物组织。通过应用生物蓄积系数(BAC)确定植物稳定化潜力,生物浓缩因子(BCF),和易位因子(TF)。此外,对植物标本进行生存和生物参数评估。受污染的基质和相关的根际材料主要由白云石组成,石英,黄铁矿,和页硅酸盐。Zn是基体中含量最丰富的金属,根际,和土壤孔隙水。对根系的XRD分析表明,存在无定形纤维素和石英,Zn是植物组织中含量最高的金属。H.微叶亚种。Tyrhenicum限制了金属在根部的积累,限制了它们在Aereal部分的易位,表明其作为植物稳定剂的潜在用途(BCF,BAC,TF<1)。生存和生长数据显示了对不同基质的良好适应性,堆肥的实施具有明显的积极作用,增加了植物的存活率并减少了根部对金属的吸收。
The mitigation of metals contamination is currently a crucial issue for the reclamation of mine sites. Indeed, mine wastes are often disposed in open dumps and consequently pollutants are subjected to dispersion in the surrounding areas. In this
study, the potential use of Helichrysum microphyllum subsp. tyrrhenicum for
phytostabilization was evaluated in ex situ conditions. Ninety specimens were randomly selected and were planted in three substrates (reference substrate, mine waste materials, and mine wastes with compost). Mineralogical compositions of substrates, rhizosphere, and roots were assessed through X-ray diffraction (XRD). Zn, Pb, and Cd concentrations of substrates, rhizosphere, soil pore waters, and plant tissues were determined. The
phytostabilization potential was determined through the application of biological accumulation coefficient (BAC), biological concentration factor (BCF), and translocation factor (TF). Moreover, survival and biometric parameters were assessed on plant specimens. The polluted substrates and related rhizosphere materials were mainly composed of dolomite, quartz, pyrite, and phyllosilicate. Zn was the most abundant metal in substrates, rhizosphere, and soil pore waters. XRD analysis on roots showed the presence of amorphous cellulose and quartz and Zn was the most abundant metal in plant tissues. H. microphyllum subsp. tyrrhenicum restricts the accumulation of the metals into roots limiting their translocation in aereal parts, indicating its potential use as phytostabilizer (BCF, BAC, TF < 1). Survival and growth data showed a great adaptability to different substrates, with an evident positive effect of the implementation of compost which increased the plant survival and decreased the metals uptake into roots.