Phytoextraction of Cr(VI) from soil using Portulaca oleracea

被引：14

作者：

Alyazouri, Ayman H. ^{[1
]}

Jewsbury, Roger A. ^{[1
]}

Tayim, Hassan A. ^{[2
]}

Humphreys, Paul N. ^{[1
]}

Al-Sayah, Mohammad H. ^{[2
]}

机构：

[1] Univ Huddersfield, Dept Chem & Biol Sci, Huddersfield HD1 3DH, W Yorkshire, England

[2] Amer Univ Sharjah, Dept Biol Chem & Environm Sci, Sharjah, U Arab Emirates

来源：

TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY | 2013年 / 95卷 / 08期

关键词：

phytoremediation; phytoextraction; hexavalent chromium; Cr(VI); Portulaca oleracea; UAE soil; CHROMIUM; HYPERACCUMULATOR; ACCUMULATION; REDUCTION; CR(III); TRANSPORT; GROWTH;

D O I：

10.1080/02772248.2013.877463

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Cr(VI) represents an environmental challenge in both soil and water as it is soluble and bioavailable over a wide range of pH. In previous investigations, Portulaca oleracea (a plant local to the United Arab Emirates (UAE)) demonstrated particular ability for the phytoextraction of Cr(VI) from calcareous soil of the UAE. In this publication, the results of the evaluation of P. oleracea phytoextraction of Cr(VI) from UAE soil at higher concentrations are reported. P. oleracea was exposed to nine different concentrations of Cr(VI) in soil from 0 to 400mg kg(-1). The uptake of Cr(VI) increased as its concentration in soil increased between 50 and 400mg kg(-1), with the most efficient removal in the range from 150 to 200mg kg(-1). The total chromium concentrations exceeded 4600mg kg(-1) in roots and 1400mg kg(-1) in stems, confirming the role of P. oleracea as an effective Cr(VI) accumulator. More than 95% of the accumulated Cr(VI) was reduced to the less toxic Cr(III) within the plant.

引用

页码：1338 / 1347

页数：10

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