کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
683643 | 889004 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Phytoremediation of Cr(III) by Ipomonea aquatica (water spinach) from water in the presence of EDTA and chloride: Effects of Cr speciation Phytoremediation of Cr(III) by Ipomonea aquatica (water spinach) from water in the presence of EDTA and chloride: Effects of Cr speciation](/preview/png/683643.png)
Wastewater is often co-contaminated with chromium, chelating agents, and chloride. Influences of Cr3+ speciation on Cr phytoremediation by Ipomonea aquatica were investigated. MINEQL+ was employed to estimate Cr speciation. Statistic regression was used to investigate the relationships between Cr speciation and accumulation. I. aquatica accumulated high Cr concentration (13,217 mg kg−1) in the root at Cr3+ of 10 mg l−1 and EDTA of 10−4 M after 14 d growth. Pearson correlation analysis indicates that root Cr concentration significantly correlated with Cr–EDTA speciation (r = 0.67, p < 0.05) and Cr–Cl speciation (r = 0.91, p < 0.01). Shoot Cr concentration also significantly correlated with Cr–Cl speciation (r = 0.97, p < 0.01). An increase in Cl− concentration to 1.72 × 10−4 M enhanced root Cr concentration; however, the accumulation of root Cr was inhibited at high Cl− concentration (5.76 × 10−5 M). Microscopic image showed that a high portion of Cr3+ accumulated on the root surface.
Journal: Bioresource Technology - Volume 101, Issue 9, May 2010, Pages 3033–3039