The possibility of in situ heavy metal decontamination of polluted soils using crops of metal-accumulating plants

Baker, A. J. M.; McGrath, Steve P.; Sidoli, C. M. D.; Reeves, Roger D.

doi:10.1016/0921-3449(94)90077-9

Cited by 599 publications

(259 citation statements)

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“…Phytoextraction has been advocated as a costeffective and environmentally-friendly alternative to conventional engineering technologies for the remediation of soils contaminated with heavy metals (HMs) (Baker, McGrath, Sidoli, & Reeves, 1994;Cunningham, Berti, & Huang, 1995). The objective of phytoextraction is to decrease the HM content of contaminated soils to an environmentally safe and legally acceptable level.…”

Section: Introductionmentioning

confidence: 99%

“…Early phytoextraction research mainly focused on plants with a high HM uptake, so-called 'hyperaccumulating' plant species. These are defined as higher plants capable of accumulating >100 mg Cd kg −1 , >1000 mg Cu, Ni, and Pb kg −1 , and >10 000 mg Zn kg −1 dry matter (dm) in their shoots when grown in HM-rich soils (Baker & Brooks, 1989;Baker et al, 1994). However, hyperaccumulators often accumulate only a specific HM and have a low biomass production leading to long duration times before completion of remediation (Cunningham et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Predicting the Phytoextraction Duration to Remediate Heavy Metal Contaminated Soils

Koopmans

Römkens²,

Song

et al. 2007

Water Air Soil Pollut

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The applicability of phytoextraction to remediate soils contaminated with heavy metals (HMs) depends on, amongst others, the duration before remediation is completed. The impact of changes in the HM content in soil occurring during remediation on plant uptake has to be considered in order to obtain a reliable estimate of the phytoextraction duration. To simulate the decrease in the HM content in soil and to assess the resulting decrease in the uptake of HMs by plants, contaminated soil was mixed with uncontaminated, but otherwise similar soil. Uptake of Cd, Pb, and Zn by the indicator plant Lupinus hartwegii and the Zn hyperaccumulator Thlaspi caerulescens (La Calamine ecotype) was a log-linear function of the in-situ measured HM soil solution concentrations. Over a wide range in dissolved Cd and Zn concentrations, uptake of these HMs by T. caerulescens was (much) greater than by L. hartwegii. Experimentally derived regression models describing the relationships between soil, soil solution, and plant were implemented in a HM mass balance model used to obtain estimates of the phytoextraction duration. For our target soils, estimates of the Cd phytoextraction duration using L. hartwegii or T. caerulescens increased significantly by more than 100 or 50 years when experimental soil-soil solution-plant relationships were used instead of the assumption of constant plant uptake of Cd. The two approaches gave similar results for phytoextraction of Zn by T. caerulescens.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Predicting the Phytoextraction Duration to Remediate Heavy Metal Contaminated Soils

Koopmans

Römkens²,

Song

et al. 2007

Water Air Soil Pollut

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“…Ur Ã hÃ yh h r hq Q a 8q Qi 8 Considerando-se a maior contaminação estudada e a quantidade de metais presentes neste solo, bem como a expectativa de extração destes pelas plantas, estima-se que a mostarda retirou do solo cerca de 9% do Zn e Cd, capacidade, esta, elevada, quando comparada com espécies biorremediadoras, como a Brassica napus, que retira, em cada cultivo, apenas 3% do total de Zn no solo contaminado, por cada cultivo (Baker et al, 1994). Apesar de representar pequena quantidade de metal extraído, esta pode ter sido suficiente para favorecer o crescimento das gramíneas após o primeiro corte.…”

Section: Hr Hvunclassified

“…Alguns desses elementos são essenciais para várias funções fisioló-gicas nos seres vivos, como Fe, Cu, Zn e Mn, enquanto outros, como Cd, Pb e Hg, não têm funções biológicas conhecidas. Quando em excesso no solo, esses elementos podem inibir o crescimento das plantas e causar alterações nas comunidades vegetais (Baker et al, 1994), como também exercer efeitos adversos sobre os microrganismos do solo (Valsecchi et al, 1995), interferindo nas funções do ecossistema, com conseqüências ao meio ambiente e à saúde pública.…”

Section: Introductionunclassified

Estabelecimento de plantas herbáceas em solo com contaminação de metais pesados e inoculação de fungos micorrízicos arbusculares

Carneiro

Siqueira

Moreira

2001

Pesq. agropec. bras.

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Neste trabalho estudou-se o estabelecimento de plantas herbáceas em solo com contaminação de metais pesados (MP) e inoculação de fungos micorrízicos arbusculares (FMAs). O experimento foi realizado em bandejas, em esquema fatorial 5 x 2, sendo cinco proporções de solo contaminado com MP na ausência e presença de FMAs. Sementes de oito espécies de gramíneas e uma crucífera (mostarda -- Brassica sp.) foram plantadas e cultivadas por 120 dias e avaliadas em dois cortes. No primeiro corte, as gramíneas foram severamente afetadas pela contaminação, e a mostarda foi pouco afetada, mostrando alta tolerância. No segundo corte, o efeito da contaminação foi negligível para as gramíneas, e a inoculação dos FMAs aumentou em 24% a matéria seca destas em relação ao controle sem inoculação. A inoculação teve também efeito positivo na matéria seca das raízes e na colonização micorrízica. Os teores de Cd, Zn e Pb na parte aérea foram maiores na mostarda do que nas gramíneas em ambos os cortes. Apesar de a inoculação não ter efeito no crescimento das gramíneas do primeiro corte, as plantas com inoculação apresentaram maior acúmulo de Zn, Cd e Pb no segundo corte. A maior tolerância da mostarda aos metais pesados permitiu seu crescimento e conseqüente acúmulo de Zn, Cd e Pb do solo contaminado. A extração destes elementos do solo pode ter contribuído para o melhor desenvolvimento subseqüente das gramíneas, favorecendo o estabelecimento das plantas.

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“…texture and organic matter) (Baker et al 1994;Luo et al 2005). An ideal plant for metal clean-up is one with high biomass, deep root system and high tolerance for metal accumulation and the capacity to translocate in the aboveground portion.…”

Section: Introductionmentioning

confidence: 99%

Phytoextraction of soil cadmium and zinc by microbes-inoculated Indian mustard (Brassica juncea)

Chauhan

Rai

2009

Journal of Plant Interactions

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A pot experiment was carried out to evaluate the effect of Pseudomonas fluorescens and Trichoderma harzianum inoculation on the uptake of zinc (Zn) and cadmium (Cd) by Indian mustard (Brassica juncea) from the soil having three different concentrations of Zn (300, 600, 900 mg/kg) and Cd (5, 10, 15 mg/kg) separately. Microbial inoculation resulted in significantly better plant growth, available metal content and their uptake than control (without microbes). Available Zn was enhanced, ca.1.6-and 1.4-fold and Cd ca. 2.5-and 1.8-fold, by P. fluorescens and T. harzianum respectively. P. fluorescens resulted in an increase in Zn uptake by 113.9, 51.9 and 58.4% and T. harzianum by 42.6, 32.1 and 33.9% over control from soils having 300, 600 and 900 mg Zn, respectively, while of the corresponding results for Cd were 110.2, 48.9 and 58.1% with P. fluorescens and 42.6, 30.9 and 33.4% with T. harzianum from soil having 5, 10 and 15 mg Cd, respectively, after 90 days of treatment. In general the rate of metal uptake was higher during the initial 30 days and declined later.

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The possibility of in situ heavy metal decontamination of polluted soils using crops of metal-accumulating plants

Cited by 599 publications

References 1 publication

Predicting the Phytoextraction Duration to Remediate Heavy Metal Contaminated Soils

Predicting the Phytoextraction Duration to Remediate Heavy Metal Contaminated Soils

Estabelecimento de plantas herbáceas em solo com contaminação de metais pesados e inoculação de fungos micorrízicos arbusculares

Phytoextraction of soil cadmium and zinc by microbes-inoculated Indian mustard (Brassica juncea)

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