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首頁> 外文學(xué)位 >Phytoremediation of perchlorate by native and exotic riparian phreatophytes of the Las Vegas Wash, Nevada.
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Phytoremediation of perchlorate by native and exotic riparian phreatophytes of the Las Vegas Wash, Nevada.

機(jī)譯：內(nèi)華達(dá)州拉斯維加斯洗地植物的原生和外來河岸藻類植物對高氯酸鹽的植物修復(fù)作用。

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摘要

The potential to use native (Salix exigua) and exotic (Tamarix ramosissima) phreatophytes to remediate perchlorate from arid riparian environments was investigated by conducting a hydroponic greenhouse experiment. Salix exigua and Tamarix ramosissima exposed to ammonium perchlorate at concentrations of 10 mg L -1 and 100 mg L-1 removed 15 to 22% perchlorate mass from hydroponic solution, with 55 to 64% of removal being taken up into plant tissue. Total perchlorate taken up by plants or removed from solution was not significantly different between species on a mass or oven dry plant weight concentration basis. Significant differences in tissue specific uptake, however, were detected, with Salix exigua accumulating 78 to 87% of perchlorate in the leaf and Tamarix ramosissima exuding 84 to 87% of uptake onto leaf surfaces. Burning leaf tissue resulted in no detectable perchlorate in ash.
機(jī)譯：通過進(jìn)行水培溫室試驗(yàn)，研究了使用天然（Salix exigua）和外來（Tamarix ramosissima）的藻類植物修復(fù)干旱河岸環(huán)境中高氯酸鹽的潛力。暴露于高氯酸銨濃度為10 mg L -1和100 mg L-1的柳柳和柳柳（Tamarix ramosissima）從水培溶液中去除了15至22％的高氯酸鹽質(zhì)量，其中55至64％的去除物被吸收到植物組織中。植物的總高氯酸鹽吸收量或從溶液中去除的總高氯酸鹽在質(zhì)量或烘箱干燥植物重量濃度的基礎(chǔ)上在物種之間沒有顯著差異。然而，檢測到組織特異性吸收存在顯著差異，柳柳（Salix exigua）在葉片中積聚了78％至87％的高氯酸鹽，而柳柳（Tamarix ramosissima）在葉片表面上積聚了84％至87％的吸收。燃燒葉子組織不會導(dǎo)致灰分中檢測到高氯酸鹽。

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