Abstract

This pot experiment analyzed the use of Brassica napus, Elymus elongatus and Zea mays in the removal of Cd²⁺ Co²⁺ and Ni²⁺ from the soil. The utility of the plants under study for phytoremediation was analyzed based on the biomass of the aboveground parts and roots and the accumulation of metals, bioaccumulation, bioconcentration and translocation capability in the above-ground parts and roots. The effect of heavy metals on the soil enzyme activity and soil physicochemical properties was also determined. Among the species under study, only E. elongatus was found to be suitable for Cd²⁺ phytoextraction, whereas E. elongatus and Z. mays proved to be suitable for phytostabilisation of Cd²⁺ and Co²⁺ because the criterion of the accumulation of metals in the roots at a sufficient level was fulfilled. The index of bioaccumulation in roots was greater than one. Both plant species met the second condition which determined the utility for phytostabilisation, as since the transport of Cd²⁺ Co²⁺ and Ni²⁺ from the roots to the above-ground parts was limited.

摘要

该盆栽实验分析了甘蓝型油菜，大肠披碱草和玉米在土壤中去除Cd ²⁺ Co ²⁺和Ni ²⁺的用途。根据地上部分和根系的生物量以及地上部分和根系中金属的积累，生物累积，生物富集和转运能力，对正在研究的植物进行植物修复的效用进行了分析。还确定了重金属对土壤酶活性和土壤理化性质的影响。在所研究的物种中，只有E.longateus被发现适合Cd ^2+的植物提取，而事实证明，E。elongatus和Z. mays适合于Cd ²⁺和Co ²⁺的植物稳定化，因为满足了根中金属积累量足够高的标准。根部的生物积累指数大于1。两种植物都满足了决定植物稳定作用的第二条件，因为从根到地上部分的Cd ²⁺ Co ²⁺和Ni ²⁺的运输受到限制。