Phytoremediation of Soils Contaminated with Organic Pollutants

White, Jason C.; Newman, L.

doi:10.1002/9780470944479.ch20

Cited by 3 publications

(1 citation statement)

References 102 publications

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“…Assim, buscando mitigar os efeitos nocivos no uso dos herbicidas, surgem as pesquisas com a fitorremediação, que nesse caso, pode ocorrer por dois mecanismos: (i) fitoestimulação, em nível rizosférico, em que os microorganismos degradantes associados às raízes de plantas tolerantes têm sua ação estimulada pela exsudação radicular dessas espécies; ou (ii) fitodegradação ou fitotransformação (Tabela 2), a qual ocorre pela absorção seguida de subsequente volatilização, ou degradação parcial ou completa, em que o contaminante é transformado em compostos menos tóxicos, combinados e/ou ligados nos tecidos das plantas (ACCIOLY;SIQUEIRA, 2000;CUNNINGHAM et al, 1996;SCHNOOR;DEE, 1997). Segundo Santos et al (2006), a densidade populacional de plantas remediadoras também pode proporcionar maior volume de raízes e de solo explorado, acarretando um incremento da absorção/degradação do contaminante e/ou degradação rizosférica.…”

Section: Fitorremediação Solos Contaminados Com Herbicidasunclassified

Plantas como Ferramentas para a Remediação Ambiental: uma Revisão da Literatura

Rodrigues

Orlandelli

2018

UNIC

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Diversos poluentes – tais como: os compostos orgânicos e inorgânicos e metais pesados, resultantes de atividades antrópica – contribuem com a degradação de ambientes terrestres e aquáticos. Nesse cenário, surge a fitorremediação: uma técnica de biorremediação, em que determinadas espécies de plantas são utilizadas como agentes de descontaminação, removendo, imobilizando ou tornando os contaminantes menos ofensivos ao ecossistema. Embora recente, essa técnica tem apresentado respostas positivas concernentes à descontaminação de água e solos. Assim, o presente artigo teve como objetivo relacionar diferentes espécies de plantas com potencial remediador frente a diversos tipos de contaminantes. Para tanto, foi realizada uma revisão da literatura científica nacional e internacional, a partir da busca de estudos disponíveis no Google Acadêmico, PubMed, Portal de Periódicos da CAPES, SciELO, além de livros de referência, dissertações e teses. As publicações analisadas atestaram que, embora seja uma tecnologia ainda em desenvolvimento, são notáveis diversas vantagens da fitorremediação, como o baixo custo de implantação e sua natureza não invasiva. Além disso, pode ser destacado o potencial fitorremediador recentemente descrito para diferentes espécies vegetais.Palavras-chave: Fitorremediação. Descontaminação Ambiental. Metais Pesados. Herbicidas. Efluentes Industriais.AbstractSeveral pollutants – such as organic and inorganic compounds and heavy metals, resulting from anthropic activities – contribute to the errestrial and aquatic environments degradation. In this scenario, phytoremediation emerges: a bioremediation technique in which certain plant species are used as decontamination agents, removing, immobilizing or making the contaminants less offensive to the ecosystem. Although recent, this technique has presented positive results concerning the water and soil decontamination. Thus, the present article aimed at relating different plant species with potential to remediate different types of contaminants. For this, a review of the national and international scientific literature was carried out, based on the search of studies available in Google Scholar, PubMed, CAPES Periodicals Portal, SciELO, as well as reference books, dissertations and theses. The analyzed publications show that, although it is a technology still in development, several advantages of phytoremediation are remarkable, such as the low cost of implantation and its noninvasive nature. Moreover, the phytoremediation potential recently described for different plant species can be higlighted.Keywords: Phytoremediation. Environmental Decontamination. Heavy Metals. Herbicides. Industrial Effluents.

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Section: Fitorremediação Solos Contaminados Com Herbicidasunclassified

Plantas como Ferramentas para a Remediação Ambiental: uma Revisão da Literatura

Rodrigues

Orlandelli

2018

UNIC

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Citric acid- and Tween® 80-assisted phytoremediation of a co-contaminated soil: alfalfa (Medicago sativa L.) performance and remediation potential

Agnello

Huguenot²,

Hullebusch³

et al. 2016

Environ Sci Pollut Res

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A pot experiment was designed to assess the phytoremediation potential of alfalfa (Medicago sativa L.) in a co-contaminated (i.e., heavy metals and petroleum hydrocarbons) soil and the influence of citric acid and Tween(®) 80 (polyethylene glycol sorbitan monooleate), applied individually and combined together, for their possible use in chemically assisted phytoremediation. The results showed that alfalfa plants could tolerate and grow in a co-contaminated soil. Over a 90-day experimental time, shoot and root biomass increased and negligible plant mortality occurred. Heavy metals were uptaken by alfalfa to a limited extent, mostly by plant roots, and their concentration in plant tissues were in the following order: Zn > Cu > Pb. Microbial population (alkane-degrading microorganisms) and activity (lipase enzyme) were enhanced in the presence of alfalfa with rhizosphere effects of 9.1 and 1.5, respectively, after 90 days. Soil amendments did not significantly enhance plant metal concentration or total uptake. In contrast, the combination of citric acid and Tween(®) 80 significantly improved alkane-degrading microorganisms (2.4-fold increase) and lipase activity (5.3-fold increase) in the rhizosphere of amended plants, after 30 days of experiment. This evidence supports a favorable response of alfalfa in terms of tolerance to a co-contaminated soil and improvement of rhizosphere microbial number and activity, additionally enhanced by the joint application of citric acid and Tween(®) 80, which could be promising for future phytoremediation applications.

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Root exudate glycine synergistically promotes phytoremediation of petroleum-contaminated soil

Li²,

Mei³

2022

Front. Environ. Sci.

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The exploitation of petroleum, the production and use of petroleum products causes pollution that is harmful to the ecology and environment. At present, petroleum hydrocarbon pollution has become a universal concern in the world. As one of the bioremediation methods, plant root exudate repair has the effect of eliminating toxic substances in the environment. To explore the role of root exudates glycine in phytoremediation of petroleum-contaminated soil, seed germination and pot experiments were carried out to study the effects of glycine on the degradation of petroleum hydrocarbons in different plants and soil types. The results showed that when the concentration of petroleum pollutants was constant, the order of seed germination rate of the eight plants was ryegrass > sudan grass > white clover > tall fescue > alfalfa > pennisetum > canine root > maize grass.1000 mg L−1 of glycine could effectively promote plant biomass and the petroleum hydrocarbons degradation rate. The degradation effect was ryegrass + glycine > ryegrass > sudan grass + glycine > sudan grass > white clover + glycine > white clover. The degradation rate of ryegrass + glycine in 18,000 mg kg−1 petroleum-contaminated soil reached 55.7%. All plants had the highest biomass and plant height in loamy soil, while the highest degradation rate of petroleum hydrocarbons was observed in sandy soil, ranging from 50.36% to 59.36%. Among them, ryegrass combined with 1000 mg L−1 of glycine reached the highest petroleum hydrocarbons degradation rate of 59.36% in sandy soil. Ryegrass, sudan grass and white clover had the potential to remediate petroleum-contaminated soils. In the three types of soil, ryegrass had a strong remediation efficiency, and the degradation effect to petroleum hydrocarbons was more significant after the addition of glycine. Therefore, ryegrass can be planted with glycine as a priority for remediation in oil field areas contaminated by petroleum hydrocarbons.

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Phytoremediation of Soils Contaminated with Organic Pollutants

Cited by 3 publications

References 102 publications

Plantas como Ferramentas para a Remediação Ambiental: uma Revisão da Literatura

Plantas como Ferramentas para a Remediação Ambiental: uma Revisão da Literatura

Citric acid- and Tween® 80-assisted phytoremediation of a co-contaminated soil: alfalfa (Medicago sativa L.) performance and remediation potential

Root exudate glycine synergistically promotes phytoremediation of petroleum-contaminated soil

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