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首页> 外文期刊>Chemosphere >Phytoremediation of barium-affected flooded soils using single and intercropping cultivation of aquatic macrophytes
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Phytoremediation of barium-affected flooded soils using single and intercropping cultivation of aquatic macrophytes

机译：单次/间作种植水生植物对受钡污染的土壤进行植物修复

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Aquatic macrophytes are potentially useful for phytoremediation on flooded areas. A field study in Brazil was conducted to evaluate Eleocharis acutangula (E), Cyperus papyrus (C) and Typha domingensis (T) in monocropping and intercropping, aiming to phytoremediate barium-polluted flooded soils. The treatments were: monocroppings (E, C and T); double intercroppings (EC, ET and CT); and triple intercropping (ECT). The 180-d field trial was performed in a flooded area with high barium content, with a randomized complete block design and three replicates. Plant stand size, biomass yield, and Ba concentration aboveground/Ba concentration in roots (translocation factor - TF) as well as Ba mass aboveground/Ba mass in roots (mass translocation factor mTF) were determined. Most of the treatments did not differ on dry biomass, except for EC, which showed the lowest yield. Consistently with its biology, E. acutangula in monocropping showed the largest plant stand. Otherwise, intercroppings with T. domingensis achieved the highest amounts of barium absorbed from the soil and transferred most of the barium content from belowground to aboveground (mTF 1.0), especially ET, which showed the highest mTF among the intercroppings (2.03). Remarkably, IF values did not reflect such phytoextraction ability for CT and ECT. Thus, mTF was more appropriate than TF to assess phytoextraction capacity. Furthermore, it was demonstrated that intercropping can increase barium uptake from flooded soils. Particularly, the inter cropping ET constituted the most cost-effective treatment, with the cyperaceous species providing high plant coverage while T. domingensis facilitated barium removal by translocating it to the aboveground biomass. (C) 2018 Elsevier Ltd. All rights reserved.
机译：水生植物对于洪灾地区的植物修复具有潜在的帮助。在巴西进行了一项田间研究，评估了单作和间作中的Eleocharis acutangula（E），莎草纸（Cyperus papyrus）（C）和Typha domingensis（T），目的是用植物修复钡污染的淹水土壤。处理方法是：单作（E，C和T）；双作（EC，ET和CT）；和三层间作（ECT）。 180天的田间试验是在钡含量高的水淹地区进行的，采用了随机完整区组设计和三份重复试验。测定植物的大小，生物量产量，地上Ba浓度/根中Ba浓度（转运因子-TF）以及地上Ba量/根中Ba量（质量转​​运因子mTF）。除EC表现出最低的产量外，大多数处理方法对干生物质没有区别。与它的生物学相一致，单剪的E. acutangula表现出最大的植物种群。否则，多明种间作获得了最高的从土壤吸收的钡，并将大部分钡含量从地下转移到了地上（mTF> 1.0），尤其是ET，在间作间表现出最高的mTF（2.03）。值得注意的是，IF值并未反映出对CT和ECT的这种植物提取能力。因此，mTF比TF更适合评估植物提取能力。此外，已证明间作可增加水淹土壤对钡的吸收。特别是，间作ET是最具成本效益的处理方式，莎草科物种提供了高植物覆盖率，而多明红锥虫通过将其转移到地上生物质中促进了钡的去除。 （C）2018 Elsevier Ltd.保留所有权利。

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