Comparison of Plant Families in a Greenhouse Phytoremediation Study on an Aged Polycyclic Aromatic Hydrocarbon–Contaminated Soil

Olson, Paul E.; Castro, A C Meira; Joern, Mark; DuTeau, Nancy M.; Pilon-Smits, Elizabeth A. H.; Reardon, Kenneth F.

doi:10.2134/jeq2006.0371

Cited by 80 publications

(41 citation statements)

References 28 publications

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“…In this study, mass balance calculation showed that the amount of PAHs directly accumulated in plants took only 0.2-1.0 % of the dissipation enhancement for phenanthrene and 0.4-6.9 % for pyrene ( Table 2), suggesting that plant uptake was weak and plant-promoted biodegradation was the dominant contribution. Our results concurred with the findings of terrestrial plants and emergent aquatic plants (Sarand et al 1998;Hojae et al 2000;Singer et al 2003;Johnsena et al 2005;Olson et al 2007). …”

Section: Dissipation Of Pahs In Sedimentssupporting

confidence: 93%

“…Plant species differ in their root exudate composition (Singer et al 2003). As the root density increased, this may have led to a supraoptimal level of a certain root released compounds, inhibiting the rate of microbial PAH degradation and the number of PAH-degrading bacteria (Olson et al 2007). Potentials of four species of submerged aquatic plants remediating PAHs-contaminated sediments were examined in this study.…”

Section: Pah-degrading Bacterial Population In Sedimentsmentioning

confidence: 99%

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Phytoremediation of sediments polluted with phenanthrene and pyrene by four submerged aquatic plants

Chi

2015

J Soils Sediments

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Purpose Plant species was considered to be a significant factor influencing the efficiency of phytoremediation. Therefore, the ability of four submerged aquatic plants to facilitate the remediation of sediments polluted with polycyclic aromatic hydrocarbons (PAHs) was compared. Materials and methods Surface sediments (top 0-15 cm) were collected from the Haihe River, Tianjin, China, and spiked with a mixture of phenanthrene and pyrene (about 15 mg kg −1 dry sediment of each PAH). Four submerged aquatic plant species (Hydrilla verticillata, Myriophyllum verticillatum, Vallisneria spiralis, and Potamogeton crispus L.) were used for the remediation experiment. The experiment lasted for 54 days. Plant length and fresh weight, and root morphology were measured. Concentrations of phenanthrene and pyrene in plants and sediments were analyzed. Sediment redox potential and PAH-degrading bacterial population were also determined. Results and discussion During a 54-day experiment, more PAHs were dissipated in planted sediments than in unplanted sediments. At the end, dissipation ratios of phenanthrene and pyrene were 48.0-85.3 and 45.7-82.4 % in planted sediments but only 33.9 and 38.3 % in unplanted sediments. Dissipation ratios of the PAHs were significantly different among the four plant species and were the highest in sediments with V. spiralis. Mass balance calculation showed that plant accumulation of phenanthrene and pyrene accounted for less than 1.0 and 6.9 % of the dissipation increments, respectively. Among the plants tested, there were significantly positive correlations between PAH dissipation ratios and sediment redox potentials. Conclusions The results suggested that different from terrestrial plant, enhanced dissipation of PAHs by submerged aquatic plants might be mainly attributed to differences in root oxygenation capabilities. Furthermore, root oxygenation may be a useful tool in screening plants for efficient remediation of PAH-polluted sediments. Extension of these results to field-aged PAH-contaminated sediments needs further investigation.

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Section: Dissipation Of Pahs In Sedimentssupporting

confidence: 93%

Section: Pah-degrading Bacterial Population In Sedimentsmentioning

confidence: 99%

Phytoremediation of sediments polluted with phenanthrene and pyrene by four submerged aquatic plants

Chi

2015

J Soils Sediments

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“…Field-contaminated soils that have undergone prolonged periods of ageing (e.g. Phillips et al 2006;Ryslava et al 2003;Liste and Prutz 2006;Liste and Felgentreu 2006;Olson et al 2007;Muratova et al 2003;Demnerova et al 2005) generally appear to be much less responsive to rhizodegradation than freshly spiked soil (e.g. Dams et al 2007;Kaimi et al 2007;Lin et al 2006;Chiapusio et al 2007;Kim et al 2006;He et al 2005He et al , 2007Gunderson et al 2007;Child et al 2007).…”

Section: Rhizodegradationmentioning

confidence: 99%

Rhizosphere processes and management in plant-assisted bioremediation (phytoremediation) of soils

2008

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Plant-assisted bioremediation or phytoremediation holds promise for in situ treatment of polluted soils. Enhancement of phytoremediation processes requires a sound understanding of the complex interactions in the rhizosphere. Evaluation of the current literature suggests that pollutant bioavailability in the rhizosphere of phytoremediation crops is decisive for designing phytoremediation technologies with improved, predictable remedial success. For phytoextraction, emphasis should be put on improved characterisation of the bioavailable metal pools and the kinetics of resupply from less available fractions to support decision making on the applicability of this technology to a given site. Limited pollutant bioavailability may be overcome by the design of plantmicrobial consortia that are capable of mobilising metals/metalloids by modification of rhizosphere pH (e.g. by using Alnus sp. as co-cropping component) and ligand exudation, or enhancing bioavailability of organic pollutants by the release of biosurfactants. Apart from limited pollutant bioavailability, the lack of competitiveness of inoculated microbial strains (in particular degraders) in field conditions appears to be another major obstacle. Selecting/engineering of plant-microbial pairs where the competitiveness of the microbial partner is enhanced through a "nutritional bias" caused by exudates exclusively or primarily available to this partner (as known from the "opine concept") may open new horizons for rhizodegradation of organically polluted soils. The complexity and heterogeneity of multiply polluted "real world" soils will require the design of integrated approaches of rhizosphere management, e.g. by combining co-cropping of phytoextraction and rhizodegradation crops, inoculation of microorganisms and soil management. An improved understanding of the rhizosphere will help to translate the results of simplified bench scale and pot experiments to the full complexity and heterogeneity of field applications.

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“…Penetrating and breaking-up the soil, plant roots create the macropores that provide microorganisms by air and water resources thereby increasing microbial activities and biodegradation rates of pollutants. The accelerated degradation of organic pollutants by microorganisms in the planted soils in comparison with unplanted ones has been demonstrated (Huang et al 2005;Juhanson et al 2007;Olson et al 2007).…”

Section: Phytoremediation Of Polluted Soilsmentioning

confidence: 97%

Plant Resistance to Anthropogenic Toxicants: Approaches to Phytoremediation

Alizade¹,

Alirzayeva²,

Shirvani³

2010

Plant Adaptation and Phytoremediation

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The problem of soil preservation and restoration has became more intense due to continued deterioration of the ecological systems of the world. This problem is especially important for Azerbaijan, where environmental pollution by heavy metals and oil products is increasing. Though the nature of toxicity of these two factors is different, they both affect plant productivity, including agricultural crops and human health. This review is devoted to the analysis of modern conceptions on fundamental physiological mechanisms of plant resistance to toxic levels of heavy metals and organic pollutants in soils, also of their uptake and translocation in plants. Different aspects of the nature of toxicity of metals and petroleum hydrocarbons and genetic basis of plant resistance to them, hyperaccumulation mechanisms of heavy metals by some plant species and approaches to phytoremediation of both inorganic and organic pollutants are discussed.

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Comparison of Plant Families in a Greenhouse Phytoremediation Study on an Aged Polycyclic Aromatic Hydrocarbon–Contaminated Soil

Cited by 80 publications

References 28 publications

Phytoremediation of sediments polluted with phenanthrene and pyrene by four submerged aquatic plants

Phytoremediation of sediments polluted with phenanthrene and pyrene by four submerged aquatic plants

Rhizosphere processes and management in plant-assisted bioremediation (phytoremediation) of soils

Plant Resistance to Anthropogenic Toxicants: Approaches to Phytoremediation

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