Effects of Reductants on Phytoextraction of Chromium (VI) by Ipomoea aquatica

doi:10.1080/15226514.2014.910173

中山醫學大學機構典藏 CSMUIR > 醫學科技學院 > 醫學檢驗暨生物技術學系暨碩士班 > 期刊論文 > Item 310902500/15941

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题名:	Effects of Reductants on Phytoextraction of Chromium (VI) by Ipomoea aquatica
作者:	SS, Ton MW, Lee YH, Yang SK, Hoi WC, Cheng KS, Wang HH, Chang SH, Chang
贡献者:	中山醫學大學
日期:	2014
上传时间:	2016-09-06T07:17:11Z (UTC)
ISSN:	1522-6514
摘要:	Reductants are often used to reduce Cr(VI) in chemical treatments, yet the effects of the reductants on Cr(VI) phytoremediation are not fully understood. This study investigates the effects of different reductants on Cr(VI) phytoremediation by Ipomoea aquatica in simulated solution with 3 mg L(-1) of Cr(VI), pH0 of 6, and an incubation time of 5 days. Results indicate that the applications of S2O3(2-), Fe0, and Fe2+ at low doses notably increased root Cr concentrations, which were obviously higher than that those in the control (Cr6+ alone). However, high reductant concentrations decreased bioaccumulation of Cr in the roots and shoots of the plant. Statistical results indicate that Cr concentrations were significantly and negatively correlated with Fe concentrations in the roots and shoots of the plant (p<0.05). This suggest that Fe accumulation inhibited Cr accumulation in the plant. A Cr(VI) concentration of 3 mg L(-1) caused short, brown lateral roots with tip necrosis, leaf chlorosis, and noticeable shoot wilting. The leaf necrosis and shoot wilting is caused by oxidative damage of lateral roots by Cr(VI) rather than by the reactive oxygen species generated by the oxidative stress. Addition of the reductants effectively reduced these plant injuries.
URI:	http://dx.doi.org/10.1080/15226514.2014.910173 https://ir.csmu.edu.tw:8080/ir/handle/310902500/15941
關聯:	Int J Phytoremediation. 2015;17(1-6):429-36.
显示于类别:	[醫學檢驗暨生物技術學系暨碩士班] 期刊論文

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