Zhang Jun, Yang Ningning, Geng Yani, Zhou Jinhong, Lei Ji
Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation, College of Geography and Environment, Baoji University of Arts and Sciences Baoji 721013 P. R. China
Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University Xi'an 710054 China.
RSC Adv. 2019 Jul 2;9(36):20603-20611. doi: 10.1039/c9ra01986c. eCollection 2019 Jul 1.
The effects of cadmium (Cd), lead (Pb) and zinc (Zn) combined pollution on the phytoextraction efficiency of ryegrass ( L.) were investigated in this work. Orthogonal experimental design was adopted in pot test (composition and interaction). The results showed that, with the increase of heavy metal concentration, the accumulation of elements in ryegrass was increased. The order of enrichment in root was Cd > Pb > Zn, was Zn > Pb > Cd in the stem and leaf, and the order of total EF was Cd > Zn > Pb. Ryegrass revealed the strongest enrichment effect on soil Cd and a strong ability to transfer Zn. Besides, ryegrass showed good potential in phytoextraction heavy metal Cd pollution and Cd × Zn combined pollution.
本研究考察了镉（Cd）、铅（Pb）和锌（Zn）复合污染对黑麦草（Lolium perenne L.）植物提取效率的影响。采用正交试验设计进行盆栽试验（成分与交互作用）。结果表明，随着重金属浓度的增加，黑麦草中元素的积累量增加。根部富集顺序为Cd＞Pb＞Zn，茎和叶中为Zn＞Pb＞Cd，总富集系数顺序为Cd＞Zn＞Pb。黑麦草对土壤Cd的富集作用最强，对Zn有较强的转运能力。此外，黑麦草在植物提取重金属Cd污染和Cd×Zn复合污染方面具有良好的潜力。
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