Promises and Prospects of Phytoremediation

Cunningham, Scott D.; Ow, David W.

doi:10.1104/pp.110.3.715

Cited by 859 publications

(364 citation statements)

References 19 publications

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“…Although abundant biomass production was a desirable characteristic for remediation Potential of macrophytes for removing atrazine from aqueous solution purposes (Cunningham & Ow, 1996;Williams, 2002;Pilon-Smits & Pilon, 2002;Pilon-Smits, 2005), if the removal efficiency were the same for the three species, the use of the plant that produced less biomass could be recommended. Thus, the use of A. caroliniana and L. gibba would be indicated to remedy environments with concentrations of 0.1 mg L -1 atrazine in the water, because they produced less fresh mass.…”

Section: Efficiency Of Atrazine Removalmentioning

confidence: 99%

“…It is important to point out that the remediation efficiency of atrazine in solution decreased with the increase in the concentration of the pollutant in the environment, thus showing the efficiency of using the phytoremediation technique for environments with low to medium contamination (Cunningham & Ow, 1996;Garbisu & Alkorta, 2001;Williams, 2002;Tsao, 2003;Suresh & Ravishankar, 2004;PilonSmits, 2005).…”

Section: Atrazine Absorption By Aquatic Macrophytesmentioning

confidence: 99%

“…Many plants can absorb organic compounds, metabolizing them or even releasing exudates that stimulate the microbial population and consequently degrade or complex the pollutants while still in the rhizosphere (Burken & Schnoor, 1996). It is generally more difficult to work with organic contaminants because of their molecular diversity, the complexity of analysis, and the constant transformations that they are subject to (Cunningham & Ow, 1996), in addition to the possibility of transforming the pollutants in sub products that are more toxic than the original substance. Some microorganisms (bacteria, micro-algae, and fungi) have also shown a capacity to partially or totally biodegrade the atrazine molecule, resulting in the formation of ammonia (NH 3 ) and carbon dioxide (CO 2 ) (Ueta et al, 1999(Ueta et al, , 2004Gao et al, 2000;Andersona et al, 2002;Lanyi & Dinya, 2003.…”

Section: Introductionmentioning

confidence: 99%

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Potential of macrophytes for removing atrazine from aqueous solution

et al. 2011

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-The potential of three macrophytes, Azolla caroliniana, Salvinia minima, and Lemna gibba was assessed in this study to select plants for use in environmental remediation contaminated with atrazine. Experiments were carried out in a greenhouse over six days in pots containing Hoagland 0.25 strength nutritive solution at the following atrazine concentrations: 0; 0.01; 0.1; 1.0; 10.0 mg L -1 . Decrease in biomass accumulation was observed in the three macrophytes, as well as toxic effects evidenced by the symptomatology developed by the plants which caused their deaths. The chlorosis and necrosis allowed to observe in the plants the high sensitivity of the three species to the herbicide. Plants presented low potential for removal of atrazine in solution when exposed to low concentrations of the herbicide. However, at the 10.0 mg L -1 atrazine concentration, L. gibba and A. caroliniana showed potential to remove the herbicide from the solution (0.016 and 0.018 mg atrazine per fresh mass gram, respectively). This fact likely resulted from the processes of atrazine adsorption by the dead material. The percentage of atrazine removed from the solution by the plants decreased when the plants were exposed to high concentrations of the pollutant. Azolla caroliniana, S. minima, and L. gibba were not effective in removing the herbicide from solution. The use of these species to remedy aquatic environments was shown to be limited.Keywords: Azolla caroliniana, Salvinia minima, Lemna gibba, herbicide, bioremediation.RESUMO -Avaliou-se, neste estudo, o potencial de três macrófitas -Azolla caroliniana, Salvinia minima e Lemna gibba -com vistas à seleção de plantas para remediação de ambientes contaminados por atrazine. Foram realizados experimentos em casa de vegetação durante seis dias, em vasos contendo solução nutritiva Hoagland (0,25 de força iônica), nas seguintes concentrações de atrazine: 0; 0,01; 0,1; 1,0; e 10,0 mg L -1 . A redução da biomassa acumulada pelas macrófitas foi observada, bem como os efeitos de toxidez evidenciados pela sintomatologia desenvolvida nas plantas, os quais causaram sua morte. Clorose e necrose observadas nas plantas mostraram a alta sensibilidade das três espécies ao herbicida. As plantas demonstraram baixo potencial para remoção de atrazine, quando expostas ao herbicida em baixas doses. Entretanto, na concentração de 10,0 mg L -1 de atrazine, L. gibba e A. caroliniana mostraram potencial para remover o herbicida da solução (0,016 e 0,018 mg de atrazine por grama de massa fresca, respectivamente). Esse fato provavelmente resultou do processo de adsorção de atrazine pela matéria morta. A porcentagem de atrazine removida da solução pelas plantas diminuiu quando estas foram expostas a altas concentrações do poluente. Azolla caroliniana, S. minima e L. gibba não foram eficazes na remoção do herbicida na solução. A utilização dessas espécies para sanar ambientes aquáticos mostrou-se limitada.

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Section: Efficiency Of Atrazine Removalmentioning

confidence: 99%

Section: Atrazine Absorption By Aquatic Macrophytesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Potential of macrophytes for removing atrazine from aqueous solution

et al. 2011

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“…For decreasing pollutants as well as responsive to maintaining the soil environment, integrated remediation such as phytoremediation, was regardes as an better technology to remove heavy metal by phytoextraction from plants like Poplar (Populus bonatii Levl.) and Sun Hemp (Crotalaria juncea L.) (Etim, 2012;Lorestani, 2011;Pulford and Watson, 2003;Baker et al, 2000;Raskin and Ensley, 2000;Carman et al, 1998;Critcchley, 1998;Watanabe, 1997;Cunningham and Ow, 1996). In the literatures, green remediation technology shows having an ability to remove pollutants that the related exercise on-site field to remove TPH and heavy metal was absent in Tai-wan.…”

Section: Introductionmentioning

confidence: 99%

The Removal Efficacy of Heavy Metals and Total Petroleum Hydrocarbons from Contaminated Soils by Integrated Bio-phytoremediation

Lai¹,

Lee²,

Chen³

et al. 2014

Journal of Soil and Groundwater Environment

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In this study, the bio-phytoremediation and phytoremediation technologies were applied to the soils contaminated with total petroleum hydrocarbons (TPH) and heavy metals to evaluate the remediation efficacy from May 2012 to December 2013. Poplar (Populus bonatii Levl.) and Sun Hemp (Crotalaria juncea L.) were selected and planted in phytoremediation practice. These plants were also utilized in the bio-phytoremediation practice, with the addition of earthworm (Eisenia fetida) and petroleum-degrading bacteria (Pseudomonos sp. NKNU01). Furthermore, physiological characteristics, such as photosynthesis rate and maximal photochemical yield, of all testing plants were also measured in order to assess their health conditions and tolerance levels in adverse environment. After 20 months of remedial practice, the results showed that bio-phytoremediation practice had a higher rate of TPH removal efficacy at 30-60 cm depth soil than that of phytoremediation. However, inconsistent results were discovered while analyzing the soil at 100 cm depth. The study also showed that the removal efficiency of heavy metals was lower than that of TPH after remediation treatment. The results from test field tissue sample analysis revealed that more Zinc than Chromium was absorbed and accumulated by the tested plants. Plant height measurements of Poplar and Sun Hemp showed that there were insignificant differences of growth between the plants in remediation plots and those in the control plot. Physiological data of Poplar also suggested it has higher tolerance level toward the contaminated soils. These results indicated that the two testing plants were healthy and suitable for this remediation study.

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“…Among them, phytoremediation has been proved as a promising new technology for environmental cleanup. The term "phytoremediation" consists of the Greek prefix phyto (plant) and the Latin root remedium (to correct or remove an evil) (5). Therefore, phytoremediation is a technology that removes contaminants or pollutants by growing particularly selected plants.…”

Section: Introductionmentioning

confidence: 99%

The Arsenic Hyperaccumulator FernPteris vittataL.

Qingen

Yan

Liao

et al. 2009

Environ. Sci. Technol.

132

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Arsenic (As) contaminated soils and waters are becoming major global environmental and human health risks. The identification of natural hyperaccumulators of As opens the door for phytoremediation of the arsenic contaminant. Pteris vittata is the first identified naturally evolving As hyperaccumulator. More than a decade after its discovery, we have made great progress in understanding the uptake, transport, and detoxification of As in the fern. The molecular mechanisms controlling As accumulation in P. vittata are now beginning to be recognized. In this review, we will try to summarize what we have learned about this As accumulator, with particular emphasis on the current knowledge of the physiological and molecular mechanisms of arsenic phytoremediation. We also discuss the potential strategies to further enhance phytoextraction abilities of P. vittata.

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Promises and Prospects of Phytoremediation

Cited by 859 publications

References 19 publications

Potential of macrophytes for removing atrazine from aqueous solution

Potential of macrophytes for removing atrazine from aqueous solution

The Removal Efficacy of Heavy Metals and Total Petroleum Hydrocarbons from Contaminated Soils by Integrated Bio-phytoremediation

The Arsenic Hyperaccumulator FernPteris vittataL.

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