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首页> 外文期刊>Environmental Science and Pollution Research >Phytoextraction of arsenic-contaminated soil with Pteris vittata in Henan Province, China: comprehensive evaluation of remediation efficiency correcting for atmospheric depositions
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Phytoextraction of arsenic-contaminated soil with Pteris vittata in Henan Province, China: comprehensive evaluation of remediation efficiency correcting for atmospheric depositions

机译：河南省Pteris Vittata植物污染土壤的植物申请：综合评价大气沉积修复效率校正

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摘要

Research on the appropriate method for evaluating phytoremediation efficiency is limited. A 2-year field experiment was conducted to investigate phytoremediation efficiency using the hyperaccumulator Pteris vittata on an arsenic (As)-contaminated site. The remediation efficiency was evaluated through the removal rate of As in soils and extraction rate of heavy metals in plants. After 2 years of remediation, the concentration of total As in soils decreased from 16.27 mg kg(-1) in 2012 to 14.58 mg kg(-1) in 2014. The total remediation efficiency of As was 10.39% in terms of the removal rate of heavy metals calculated for soils, whereas the remediation efficiency calculated from As uptake by P. vittata was 16.09%. Such a discrepancy aroused further consideration on the potential input of As. A large amount of As was brought in by atmospheric emissions, which possibly biased the calculation of remediation efficiency. In fact, considering also the atmospheric depositions of As, the corrected removal rate of As from soil was 16.57%. Therefore, the results of this work suggest that (i) when evaluating the phytoextraction efficiency, the whole input and output cycle of the element of interest in the targeted ecosystem must be considered, and (ii) P. vittata has the potential to be used to remediate As-contaminated soils in Henan Province, China.
机译：评估植物修复效率的适当方法的研究有限。进行了2年的现场实验，以研究使用砷（AS）酰胺位点上的高沉积仪Pteris Vittata来研究植物修复效率。通过植物中重金属的土壤和提取率的去除率来评估修复效率。经过2年的修复后，2012年，土壤中总量的浓度降低至2014年的14.58毫克千克（-1）。在去除率方面，其总修复效率为10.39％为土壤计算的重金属，而从P.Vittata的摄取计算的修复效率为16.09％。这种差异引起了对潜在投入的进一步考虑。大量的大气排放引起的大量，可能偏向了修复效率的计算。事实上，考虑到AS的大气沉积，来自土壤的校正去除率为16.57％。因此，这项工作的结果表明（i）在评估植物申请效率时，必须考虑目标生态系统的感兴趣元素的整个输入和输出周期，（ii）p.Vittata具有潜力修复中国河南省的污染土壤。

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