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Potential Phytoremediation of Soil Cadmium and Zinc by Diverse Ornamental and Energy Grasses

文献类型： 外文期刊

作者： Hou, Xincun 1 ; Teng, Wenjun 1 ; Hu, Yanxia 1 ; Yang, Zhichen 1 ; Li, Cui 1 ; Scullion, John 2 ; Guo, Qiang 1 ; Zheng, Ru 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Res & Dev Ctr Grasses & Environm, Beijing 100097, Peoples R China

2.Aberystwyth Univ, Inst Biol Environm & Rural Sci, Aberystwyth SY23 3DA, Dyfed, Wales

关键词： Hyperaccumulator; Heavy metal; Bioconcentration factor; Phytostabilization; Phytoextraction

期刊名称：BIORESOURCES （ 影响因子：1.614； 五年影响因子：1.923 ）

ISSN： 1930-2126

年卷期： 2020 年 15 卷 1 期

页码：

收录情况： SCI

摘要： The potential of 32 frequently studied ornamental and/or energy grasses and two cadmium/zinc hyperaccumulators for phytoextraction and phytostabilization was compared by their growth in a historically contaminated soil over a three-month pot experiment. Shoot and root biomasses varied by factors of 14.2 and 62.7, respectively. Mainly due to their large biomass, Napier grass (Pennisetum purpureum 'Purple') and variegated giant reed (Arundo donax var. versicolor) accumulated cadmium and zinc contents in shoots up to 109.3% and 55.4% higher, respectively, than those in the cadmium/zinc hyperaccumulators, despite their lower metal concentrations. Pennisetum purpureum 'Purple' accumulated the most zinc and the third highest cadmium in roots. Bioconcentration factors of cadmium in roots were greater than 1 for 19 grasses. The present study demonstrated that many of these grasses may be suitable for phytostabilization of soil cadmium. Arundo donax var. versicolor exhibited the most potential for phytoextraction of soil zinc, whereas Pennisetum purpureum 'Purple' was best for phytoextraction and phytostabilization of cadmium and phytostabilization of zinc. Ornamental/energy grasses may have greater potentials for soil remediation than hyperaccumulators, especially given their utility and eco-economic benefits. The considerable variation in their performance emphases the value of screening to select the most effective candidates.

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