Phytoremediation—An Overview

Arthur, Ellen L.; Rice, Pamela J.; Anderson, Todd A.; Baladi, Sadika M.; Henderson, Keri L. D.; Coats, Joel R.

doi:10.1080/07352680590952496

Cited by 288 publications

(129 citation statements)

References 121 publications

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“…Several comprehensive reviews on phytoremediation and phytoextraction have been recently published (Salt et al, 1998;Robinson et al, 2003;Arthur et al, 2005;Ouyang, 2002). In the present review, phytoextraction of arsenic from contaminated soils by the recently discovered arsenic hyperaccumulator ferns, with emphasis on the recent studies developed in order to understand and enhance the arsenic removal process, will be discussed.…”

Section: Introductionmentioning

confidence: 99%

Arsenic phytoextraction and hyperaccumulation by fern species

Gonzaga

Santos

Qiying

2006

Sci. agric. (Piracicaba, Braz.)

125

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Arsenic (As) is an ubiquitous trace metalloid found in all environmental media. Its presence at elevated concentrations in soils derives from both anthropogenic and natural inputs. Arsenic is a toxic and carcinogenic element, which has caused severe environmental and health problem worldwide. Technologies currently available for the remediation of arsenic-contaminated sites are expensive, environmentally disruptive, and potentially hazardous to workers. Phytoextraction, a strategy of phytoremediation, uses plants to clean up contaminated soils and has been successfully applied to arsenic contaminated soils. It has the advantage of being cost-effective and environmentally friendly. A major step towards the development of phytoextraction of arsenic-impacted soils is the discovery of the arsenic hyper accumulation in ferns, first in Pteris vittata, which presented an extraordinary capacity to accumulate 2.3% arsenic in its biomass. Another fern, Pityrogramma calomelanos was found to exhibit the same hyperaccumulating characteristics. After that, screening experiments have revealed that the Pteris genus is really unique in that many species have the potential to be used in phytoextraction of arsenic. In general, these plants seem to have both constitutive and adaptive mechanisms for accumulating or tolerating high arsenic concentration. In the past few years, much work has been done to understand and improve the hyperaccumulating capability of these amazing plants. In particular, the field of molecular biology seems to hold the key for the future of the phytoremediation. Key words: environmental contamination, hyperaccumulator plants, phytoremediation FITOEXTRAÇÃO E HIPERACUMULAÇÃO DE ARSÊNIO POR ESPÉCIES DE SAMAMBAIASRESUMO: O arsênio e um metalóide traço encontrado basicamente em todos os ambientes. Elevadas concentrações de arsênio no solo podem acontecer naturalmente devido ao intemperismo de rochas ricas em arsênio, como também de atividades antropogênicas. O arsênio é um elemento tóxico e cancerígeno. Em muitas partes do mundo, a contaminação pelo arsênio tem causado problemas ambientais e de saude. As técnicas disponíveis para a remediação do arsênio são economicamente proibitivas, destroem a paisagem natural e ainda podem afetar a saúde de pessoas diretamente envolvidas no processo. A fitoextração, uma das estratégias da fitoremediação, utiliza plantas para descontaminar solos e tem sido aplicada com sucesso em solos contaminados com arsênio e outros elementos. Dentre muitas vantagens, essa técnica tem baixo custo quando comparada com as convencionais. Um ponto chave no desenvolvimento da fitoextração foi a constatação de que samambaias hiperacumulam arsênio. Primeiro, em Pteris vittata, que apresentou extraordinária capacidade para remover arsênio do solo, concentrando 2.3% do arsênio na biomassa. Em seguida, foi observado que a samambaia Pityrogramma calomelanos possui capacidade semelhante para acumular arsênio. Essa característica peculiar foi observada em outras samambaias do genero Pteris. Em...

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Section: Introductionmentioning

confidence: 99%

Arsenic phytoextraction and hyperaccumulation by fern species

Gonzaga

Santos

Qiying

2006

Sci. agric. (Piracicaba, Braz.)

125

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“…After the plants were established, it was transferred into the constructed wetlands A and B. 13,14 Sampling and analysis The domestic wastewater was passed through the wetland systems and B and the water samples were collected after a retention time of 24, 48, 72, 96, and 120 hours. The analyzed parameters include pH, BIOCHAR FOR TREATING WASTEWATER M. Vidya Vijay et al…”

Section: Methodsmentioning

confidence: 99%

Sustainability of Constructed Wetlands in Using Biochar for Treating Wastewater

2017

RJC

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Constructed wetland (CW) is a reliable, cost effective and sustainable technology for the treatment of different sorts of wastewater via different treatment processes including biological, chemical and physical processes. Coconut Shell (CS) as Biochar was obtained through decomposition of organic material without oxygen. It offers simple, cost effective strategies to treat wastewater and decrease carbon footprint. Consolidation of both (Constructed wetland and Biochar) technologies was adopted to increase the productivity in the treatment of domestic wastewater. Reduction of parameters like nitrogen, pH, turbidity other physicochemical parameters from wastewater using biochar from coconut shell was investigated by mixing the biochar with the wetland soil. Further, in this study analyzed the effect of biochar on the growth of the plants in the wetland(Typha latifolia). The biochar amended wetlands showed greater removal efficiencies of 99.9% and 85% in turbidity and TDS, respectively as compared to the normal wetlands which exhibited an efficiency of 98% and 77.7% in removing turbidity and TDS, respectively.

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“…The use of plants to clean up soils and waters contaminated by radionuclides (phytoremediation) has been a subject of burgeoning interest over the last ten years [2][3][4][5]. These technologies are especially useful for the decontamination of soils and waters where there are low levels of widespread contaminants.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the transfer of²³⁸U and²²⁶Ra from soils toBrassica juncea

2009

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Abstract. In order to test the suitability of using Brassica juncea for the remediation by phytoextraction of soils contaminated with 238 U and 226 Ra, the transfer process to the plant was studied. A soil with high natural uranium mineralization was used for the study. When the soil was not manipulated, the transfer factor (TF) was 0.24 ± 0.02 and 1.5 ± 0.3 for 238 U and 226 Ra, respectively. These low values, especially for 238 U, are due to the radionuclides being associated in the soils with fractions unavailable to the plant. For the possible use of phytoextraction for remediation of contaminated soils it is therefore necessary to enhance the availability of the radionuclides in the soil. In this sense, soil pH is a major factor influencing the availability of these elements in the soil for plant uptake through their speciation. In this work, the effect of pH on the TF of 238 U and 226 Ra was studied. Also, citrate was used to attempt to enhance the bioavailability of the two radionuclides in the soils, and therefore their uptake by Brassica juncea and translocation to the shoots.

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Phytoremediation—An Overview

Cited by 288 publications

References 121 publications

Arsenic phytoextraction and hyperaccumulation by fern species

Arsenic phytoextraction and hyperaccumulation by fern species

Sustainability of Constructed Wetlands in Using Biochar for Treating Wastewater

Enhancing the transfer of²³⁸U and²²⁶Ra from soils toBrassica juncea

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Phytoremediation—An Overview

Cited by 288 publications

References 121 publications

Arsenic phytoextraction and hyperaccumulation by fern species

Arsenic phytoextraction and hyperaccumulation by fern species

Sustainability of Constructed Wetlands in Using Biochar for Treating Wastewater

Enhancing the transfer of238U and226Ra from soils toBrassica juncea

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Enhancing the transfer of²³⁸U and²²⁶Ra from soils toBrassica juncea