Evidence of perchlorate (ClO{sub}4{sup}-) reduction in plant tissues (poplar three) using radio-labeled 36{sup left}(36)ClO{sub}4{sup}-

Benoit Van Aken; Jerald L. Schnoor

首页> 外文期刊>Environmental Science & Technology: ES&T >Evidence of perchlorate (ClO{sub}4{sup}-) reduction in plant tissues (poplar three) using radio-labeled 36{sup left}(36)ClO{sub}4{sup}-

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Evidence of perchlorate (ClO{sub}4{sup}-) reduction in plant tissues (poplar three) using radio-labeled 36{sup left}(36)ClO{sub}4{sup}-

机译：Evidence of perchlorate (ClO{sub}4{sup}-) reduction in plant tissues (poplar three) using radio-labeled 36{sup left}(36)ClO{sub}4{sup}-

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Phytoremediation of perchlorate ((ClO{sub}4){sup}-) by poplar trees Populus deltoidex nigra was investigated using small cuttings growing in hydroponic Hoagland solution and plant tissue cultures, consisting of spherical photosynthetic cell aggregates (i.e. nodules) developing in Murashige and Skoog culture medium. Both plants and nodules were grown under a 16 h/8 h photoperiod cycle and under sterile conditions. Degradation experiments, performed by the incubation of pregrown plants and nodules in the presence of 36{sup left}Cl radio-labeled (ClO{sub}4){sup}- (25 mg L{sup}(-1)), showed a reduction of the initial (ClO{sub}4){sup}- concentration in the solution of about 50 after 30 d of incubation. Analysis of the distribution of radioactivity in different plant fractions indicated that 27.4 of the total was translocated to the leaves, while 66.9 remained in the solution. Very little radioactivity (less than 3.0) was detected in the other parts of the plants. 32.0 of the radioactivity recovered in the solution was shown to consist of 36{sup left}Cl{sup}- and 68.0 of nontransformed (36{sup left}ClO{sub}4){sup}-. The radioactivity recovered in the leaf extractswas distributed as chloride (36{sup left}C1-) (1.6 of the total), chlorite ((36{sup left}CLO{sub}2)){sup}- (2.4), chlorate ((36{sup left}ClO{sub}3){sup}-) (4.8), nontransformed (36{sup left}ClO{sub}4){sup}- (21.6), and an unidentified organic compound (1.4). The radioactivity recovered in the solution containing submerged nodules consisted of 36{sup left}Cl{sup}- (6.4 of the total), (36{sup left}ClO{sub}2){sup}- (1.3), and nontransformed (36{sup left}ClO{sub}4){sup}- (51.5). Radioactivity detected in the nodule extracts was distributed as 36{sup left}Cl{sup}- (2.0 of the total), (36{sup left}ClO{sub}2){sup}- (5.2), (36{sup left}ClO{sub}3){sup}- (6.4), (35{sup left}ClO{sub}4){sup}- (22.7), and an unidentified organic compound (0.5). These results provide evidence of perchlorate reduction inside poplar tree tissues. (36{sup left}ClO{sub}4){sup}- is partially reduced to (36{sup left}ClO{sub}3){sup}-, (36{sup left}ClO{sub}2){sup}-, and 36{sup left}Cl{sup}-.

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《Environmental Science & Technology: ES&T》 |2002年第12期|2783-2788|共6页
作者
Benoit Van Aken; Jerald L. Schnoor;
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作者单位

Department of Applied Physics and Advanced Technologies (FATA), National Autonomous University of Mexico, A.P. 1-1010, Queretaro, Qro. 67000, Mexico;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境化学;
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Evidence of perchlorate (ClO{sub}4{sup}-) reduction in plant tissues (poplar three) using radio-labeled 36{sup left}(36)ClO{sub}4{sup}-

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