title: Uptake and translocation of benzo[a]pyrene (B[a]P) in two ornamental plants and dissipation in soil.
abstract: Pot experiments were conducted to evaluate the phytoremediation of B[a]P contaminated soil using two ornamental plants (Tagetes patula and Mirabilis jalapa). The results showed that the dry biomass of two plants was increased at low B[a]P contaminated soil and then inhibited with increasing B[a]P concentrations. It exhibited a significantly positive linear relationship between B[a]P absorption in roots, stems, leaves and shoots of the tested plants and the concentration of B[a]P in soils (P<0.01). Meanwhile, the contents of B[a]P in different tissues of the plants increased with growing time. After planting T. patula and M. jalapa, plant-promoted biodegradation of B[a]P was account for 79.5-99.8% and 71.1-99.9%, respectively, whereas the amount of B[a]P dissipation enhancement was only 0.2-20.5% and 0.1-28.9%, respectively. Moreover, low bioaccumulation factor (BF) and translocation factor (TF) values indicated that T. patula and M. jalapa took up B[a]P from contaminated soil and transferred them to the aerial parts with low efficiency. The B[a]P removal rates in rhizosphere soils at different growing stages of T. patula and M. jalapa were 2.7-26.8% and 0.4%-33.9%, respectively, higher than those of non-rhizopshere soils. Therefore, the presence of T. patula and M. jalapa roots was effective in promoting the phytoremediation of B[a]P contaminated soils.
authors.affiliation: Innovation Team of Remediation for Heavy Metal Contaminated Farmlands, Agro-Environment Pollution Institute, Ministry of Agriculture, Tianjin 300191, China; Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China. Electronic address: sunyuebing2008@126.com.
authors.forename: Yuebing
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China; Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. Electronic address: zhouqx523@126.com.
authors.forename: Qixing
authors.initials: Q
authors.lastname: Zhou
mesh_terms: D001564:Benzo(a)pyrene / Q000493:pharmacokinetics* / Q000633:toxicity; D001673:Biodegradation, Environmental; D018533:Biomass; D039282:Mirabilis / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D018515:Plant Leaves / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018520:Plant Shoots / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D018547:Plant Stems / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism; D058441:Rhizosphere; D012989:Soil Pollutants / Q000493:pharmacokinetics* / Q000633:toxicity; D031686:Tagetes / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*
chemical_list: D012989:Soil Pollutants; D001564:Benzo(a)pyrene
keywords: Benzo[a]P (B[a]P); Dissipation; Distribution; Phytoremediation; Uptake