期刊
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
卷 15, 期 2, 页码 142-153出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15226514.2012.683209
关键词
wetland plants; aquatic plants; crops; TiO2 nanoparticles; phytoextraction
资金
- National Center for Research Resources [5P20RR016471-12]
- National Institute of General Medical Sciences from the National Institutes of Health [8 P20 GM103442-12]
- NATIONAL CENTER FOR RESEARCH RESOURCES [P20RR016471] Funding Source: NIH RePORTER
Bioavailability of engineered metal nanoparticles affects uptake in plants, impacts on ecosystems, and phytoremediation. We studied uptake and translocation of Ti in plants when the main source of this metal was TiO2 nanoparticles. Two crops (Phaseolus vulgaris (bean) and Triticum aestivum (wheat)), a wetland species (Rumex crispus, curly dock), and the floating aquatic plant (Elodea canadensis, Canadian waterweed), were grown in nutrient solutions with TiO2 nanoparticles (0, 6, 18 mmol Ti L-1 for P. vulgaris, T. aestivum, and R. crispus; and 0 and 12 mmol Ti L-1 for E. canadensis). Also examined in E. canadensis was the influence of TiO2 nanoparticles upon the uptake of Fe, Mn, and Mg, and the influence of P on Ti uptake. For the rooted plants, exposure to TiO2 nanoparticles did not affect biomass production, but significantly increased root Ti sorption and uptake. R. crispus showed translocation of Ti into the shoots. E. canadensis also showed significant uptake of Ti, P in the nutrient solution significantly decreased Ti uptake, and the uptake patterns of Mn and Mg were altered. Ti from nano-Ti was bioavailable to plants, thus showing the potential for cycling in ecosystems and for phytoremediation, particularly where water is the main carrier.
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