Spatial heterogeneity effects of Zn/Cd-contaminated soil on the removal efficiency by the hyperaccumulator Sedum alfredii
Spatial heterogeneity effects of Zn/Cd-contaminated soil on the removal efficiency by the hyperaccumulator Sedum alfredii
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DOI：
10.1007/s11368-013-0833-9
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发表时间：
2014-01
影响因子：
3.6
通讯作者：
Lu Tang;Ye-tao Tang;Guomao Zheng;Ganglong Zhang;Wenshen Liu;R. Qiu
中科院分区：
文献类型：
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作者：
Lu Tang;Ye-tao Tang;Guomao Zheng;Ganglong Zhang;Wenshen Liu;R. Qiu
PurposeWe aimed to examine the effects of spatial heterogeneity on Zn/Cd hyperaccumulatorSedum alfrediigrown on agricultural soil contaminated with mine waste.Materials and methodsField collected metal polluted agricultural soils arranged in pots either homogeneous or heterogeneous in“half”or“quarter”patterns. S.结果与讨论S. alfredii在“四分之一”模式异质处理中最高，土壤Zn和Cd的浸提率分别为8.02%和7.27%。比较两种异质性处理，积累的Zn和Cd的量在S. alfrediishoots显着更大的“四分之一”格局异质性处理比在“半”模式treatment.ConclusionsWe的结论是，Zn/Cd的去除效率增加的空间异质性的规模从“半”到“四分之一”。这些结果可能具有重要意义的植物修复的效率hyperoxia在该领域。
PurposeWe aimed to examine the effects of spatial heterogeneity on Zn/Cd removal efficiency by the Zn/Cd hyperaccumulatorSedum alfrediigrown on agricultural soil contaminated with mine waste.Materials and methodsField-collected metal-contaminated agricultural soils were arranged in pots either homogeneously or heterogeneously in “half” or “quarter” patterns. Young shoots ofS. alfrediiwere grown on these substrates in a greenhouse.Results and discussionThe efficiency of Zn and Cd removal from soil byS. alfrediiwas highest in the “quarter” pattern heterogeneous treatment, in which the percentages of total soil Zn and Cd extracted were 8.02 and 7.27, respectively. Comparing the two heterogeneous treatments, the amounts of Zn and Cd accumulated inS. alfrediishoots were significantly greater in the “quarter” pattern heterogeneous treatment than in the “half” pattern treatment.ConclusionsWe concluded that the efficiency of Zn/Cd removal increased as the scale of spatial heterogeneity decreased from “half” to “quarter”. These results may have important implications for the efficiency of phytoremediation by hyperaccumulators in the field.