Int J Phytoremediation. 2014;16(7-12):804-23. doi: 10.1080/15226514.2013.856850.
A work undertaken by pot and field experiments to assess the suitability of poplars and ferns for the in-situ, phytoextraction, of a dumping site with residues from the roasting process of arseno-pyrite is reported. The main characteristic of this site is the high content of both the As metalloid and heavy metals (e.g., Al, Fe, Cu, Co, Cr, Pb). Two poplar clones (Populus deltoides 'Dvina' and Populus x canadensis 'Orion') and Pteris vittata (Chinese brake fern) were planted in the contaminated soil both ex situ in pots and in situ. Plant survival, As accumulation in plant tissues, leaf content of pigments, soluble proteins, activity of catalase and SH-groups in both roots and leaves were evaluated during a 24-month study period. Both poplar and fern plants exhibited an increase in the activity of catalase and SH group contents when grown in the presence of pyrite ashes. The results showed that the co-planting system (arsenic-hyperaccumulator fern Pteris vittata and Populus clones) was suitable for phytoextraction of multi-contaminated dumping sites. Agronomic measures such as irrigation, soil tillage and amendments also seem to be necessary for the successful establishment of poplar trees and ferns in contaminated soils in order to enhance plant growth through the improvement of soil conditions.
本研究通过田间和盆栽实验，评估了杨树和蕨类植物在原位植物提取法中对含砷黄铁矿焙烧残渣污染场地的适用性。该场地的主要特征是含有大量的砷和重金属（如 Al、Fe、Cu、Co、Cr、Pb）。研究人员将两个杨树无性系（Populus deltoides 'Dvina'和 Populus x canadensis 'Orion'）和 Pteris vittata（中国凤尾蕨）种植在受污染的土壤中，包括原位种植和盆栽种植。在 24 个月的研究期间，评估了植物的存活率、植物组织中的砷积累、叶片色素含量、可溶性蛋白质含量、根系和叶片中的过氧化氢酶和 SH 基团活性。在含有黄铁矿灰分的条件下，杨树和蕨类植物的过氧化氢酶和 SH 基团活性均增加。结果表明，砷超积累蕨类植物 Pteris vittata 和杨树无性系的混种系统适用于多污染倾倒场的植物提取。为了促进植物生长，改善土壤条件，农业措施（如灌溉、土壤耕作和改良）似乎也是在污染土壤中成功种植杨树和蕨类植物所必需的。
