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首页> 外文期刊>Environmental Science and Pollution Research >Reclamation of Cr-contaminated or Cu-contaminated agricultural soils using sunflower and chelants
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Reclamation of Cr-contaminated or Cu-contaminated agricultural soils using sunflower and chelants

机译：使用向日葵和螯合剂回收Cr污染或Cu污染的农业土壤

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Chromium(Cr) and copper (Cu) are pollutants with a strong environmental impact. "Green biotechnology" as phytoremediation represents a sustainability opportunity for soil reclamation. In this study, we evaluated the possibility to reclaim agricultural soils located in the Solofrana valley, contaminated by Cr or Cu. Chromium contamination derives by repeated flooding events of Solofrana rivers containing Cr because of leather tanning plants, while Cu soil pollution was due to the use of Cu-rich pesticides in agriculture. Both metals showed a very low bioavailability. In order to perform an assisted phytoremediation of polluted fields, we carried out a preliminary ex situ experimentation testing for the first time sunflowers (cv. Pretor) and chelants (ethylenediaminetetraacetic acid (EDTA) and/or ethylene diamine disuccinate (EDDS)), useful when metal bioavailability is low. No symptoms of toxicity were observed in sunflowers grown on both soils, while biomass was improved when EDDS was added. Cr and Cu bioavailability was only slightly enhanced by chelants at the end of the treatments. Both Cr and Cu were mainly accumulated in the roots; moreover, Cu was also translocated to the aboveground organs in the presence of EDTA. The ex situ experimentation demonstrated that assisted phytoremediation is a very slow process not useful in the case of persistent pollution.
机译：铬（Cr）和铜（Cu）是具有强烈环境影响的污染物。 “绿色生物技术”作为植物修复，代表了土壤填海的可持续发展机会。在这项研究中，我们评估了通过Cr或Cu污染的Solofrana山谷的农业土壤的可能性。铬污染因皮革鞣制而含有Cr的Solofrana Rivers的重复洪水事件，而Cu土壤污染是由于农业中富含Cu的农药。两种金属显示出非常低的生物利用度。为了执行污染领域的辅助植物修复，我们对第一次向日葵（CV.GROVER）和螯合剂进行了初步的EXITU实验测试（CV.GRONGOR）和螯合剂（乙二胺四乙酸（EDTA）和/或乙二胺四酸（EDDS）），有用当金属生物利用度低时。在两种土壤上生长的向日葵中没有观察到毒性的症状，而当加入EDD时，生物质得到改善。在治疗结束时，Cr和Cu生物利用度只能略微增强。 Cr和Cu都主要积累在根部;此外，Cu也在EDTA存在下易于转移到地上器官。 EX原位实验表明，辅助植物修复是一种非常缓慢的过程，在持续污染的情况下没有用。

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