Organism-induced accumulation of iron, zinc and arsenic in wetland soils

Doyle, Melanie O.; Otte, Marinus L.

doi:10.1016/s0269-7491(97)00014-6

Cited by 212 publications

(72 citation statements)

References 22 publications

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“…Other plant-mediated processes of arsenic immobilisation at the soil-root interface involve pH reduction and oxidation of the root environment by O 2 released from roots. Doyle & Otte (1997) found accumulation of arsenic on iron plaque in the oxidised rhizosphere of salt marsh plants that may provide effective immobilization and detoxification mechanism. d) Phytovolatilization -Phytovolatilization is the use of plants to volatilize pollutants and has been demonstrated for Hg and Se.…”

Section: Phytoremediationmentioning

confidence: 99%

Arsenic phytoextraction and hyperaccumulation by fern species

Gonzaga

Santos

Qiying

2006

Sci. agric. (Piracicaba, Braz.)

126

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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: Phytoremediationmentioning

confidence: 99%

Arsenic phytoextraction and hyperaccumulation by fern species

Gonzaga

Santos

Qiying

2006

Sci. agric. (Piracicaba, Braz.)

126

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“…Salt marshes are natural deposits of heavy metals in an estuarine system (Caçador et al 1996;Doyle and Otte 1997). When located near polluted areas, these ecosystems receive large amounts of pollutants from industrial and urban wastes, which either drift downstream with the river flow or are dumped directly from nearby industrial and urban areas (Reboreda and Caçador 2007).…”

Section: Introductionmentioning

confidence: 99%

Halophytes as sources of metals in estuarine systems with low levels of contamination

Couto

Duarte

Barroso

et al. 2013

Functional Plant Biol.

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Abstract.Heavy metal concentrations present in the above-and beowground tissues of Scirpus maritimus L., Spartina maritima (Curtis) Fernald and Zostera noltii Hornem were analysed seasonally in the Mondego Estuary, Portugal. The sediments of the estuary were confirmed to contain only low concentrations of heavy metals. The belowground tissues of all three species showed higher heavy metal concentrations than the aboveground tissues. Although the sediments only contained low levels of contamination, because the area occupied by S. maritimus and Z. noltii was large, significant quantities of heavy metals were accumulated and exported to the surrounding water bodies. In contrast with observations of highly contaminated estuaries, it was found that in spite of the low level of contaminants in the sediments of the Mondego Estuary, aquatic vegetation functioned as a source of metals for nearby systems.

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“…The bioturbation of sediments by large benthic invertebrates alters sediment redox chemistry by mixing pre-stratified zones in the sediment, and increasing the penetration of electron acceptors such as dissolved O 2 , NO 3 -and SO 4 2-into anoxic sediments (Aller et al, 2001;Granéli, 1979;Matisoff et al, 1985;Pischedda et al, 2008; Volkenborn et al, 2010). Redox changes can alter metal binding affinities between the solid and dissolved phases, significantly modifying the speciation and bioavailability of most metals in sediments (De Jonge et al, 2012;Doyle and Otte, 1997;Granberg et al, 2008). The concentration of AVS has a major influence on metal bioavailability, and for sediments containing a molar excess of acid volatile sulfide (AVS) over simultaneously extractable metals (SEM, ΣCd, Cu, Ni, Pb, Zn), it is predicted that the porewater concentrations of these metals will be negligible and should not cause direct toxicity to benthic organisms Hansen et al, 2005;Lawrence et al, 1982).…”

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confidence: 99%

The impact of sediment bioturbation by secondary organisms on metal bioavailability, bioaccumulation and toxicity to target organisms in benthic bioassays: Implications for sediment quality assessment

Remaili

Simpson

Amato

et al. 2016

Environmental Pollution

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. (2015). The impact of sediment bioturbation by secondary organisms on metal bioavailability, bioaccumulation and toxicity to target organisms in benthic bioassays: implications for sediment quality assessment. Environmental Pollution, 208 (Part B), 590-599. See next page for additional authorsThe impact of sediment bioturbation by secondary organisms on metal bioavailability, bioaccumulation and toxicity to target organisms in benthic bioassays: implications for sediment quality assessment AbstractBioturbation alters the properties of sediments and modifies contaminant bioavailability to benthic organisms. These naturally occurring disturbances are seldom considered during the assessment of sediment quality. We investigated how the presence (High bioturbation) and absence (Low bioturbation) of a strongly bioturbating amphipod within three different sediments influenced metal bioavailability, survival and bioaccumulation of metals to the bivalve Tellina deltoidalis. The concentrations of dissolved copper decreased and manganese increased with increased bioturbation. For copper a strong correlation was observed between increased bivalve survival (53-100%) and dissolved concentrations in the overlying water. Increased bioturbation intensity resulted in greater tissue concentrations for chromium and zinc in some test sediments. Overall, the results highlight the strong influence that the natural bioturbation activities from one organism may have on the risk contaminants pose to other organisms within the local environment. The characterisation of field-based exposure conditions concerning the biotic or abiotic resuspension of sediments and the rate of attenuation of released contaminants through dilution or readsorption may enable laboratorybased bioassay designs to be adapted to better match those of the assessed environment.  Strong correlations between bioaccumulated and dissolved Cd, Cr, Pb, Zn, Cu and Ni. Weak correlations between bioaccumulated and particulate metals. 2 Capsule AbstractThis study investigated the impact of sediment bioturbation intensity on metal bioavailability and toxicity to aquatic organisms, and the implications of this to toxicity test design. Abstract:Bioturbation alters the properties of sediments and modifies contaminant bioavailability to benthic organisms. These naturally occurring disturbances are seldom considered during the assessment of sediment quality. We investigated how the presence (High bioturbation) and absence (Low bioturbation) of a strongly bioturbating amphipod within three different sediments influenced metal bioavailability, survival and bioaccumulation of metals to the bivalve Tellina deltoidalis. The concentrations of dissolved copper decreased and manganese increased with increased bioturbation. For copper a strong correlation was observed between increased bivalve survival (53 to 100%) and dissolved concentrations in the overlying water. Increased bioturbation intensity resulted in greater tissue concentrations for chromium and zinc in some test sediments. O...

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Organism-induced accumulation of iron, zinc and arsenic in wetland soils

Cited by 212 publications

References 22 publications

Arsenic phytoextraction and hyperaccumulation by fern species

Arsenic phytoextraction and hyperaccumulation by fern species

Halophytes as sources of metals in estuarine systems with low levels of contamination

The impact of sediment bioturbation by secondary organisms on metal bioavailability, bioaccumulation and toxicity to target organisms in benthic bioassays: Implications for sediment quality assessment

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