Integrating geochemical (surface waters, stream sediments) and biological (diatoms) approaches to assess AMD environmental impact in a pyritic mining area: Aljustrel (Alentejo, Portugal)

Luís, Ana Teresa; Durães, Nuno; Silva, Eduardo Ferreira da

doi:10.1016/j.jes.2015.07.008

Cited by 35 publications

(40 citation statements)

References 24 publications

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“…Further details of biosorption are discussed in Section 6. Among biofilm components, diatoms (microscopic and unicellular "brown algae") are extensively used as reliable environmental bioindicators of both toxicity (e.g., [95][96][97]) and recovery in fluvial ecosystems (e.g., [98]).…”

Section: Microbial Biofilms In Freshwater Systemsmentioning

confidence: 99%

Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review

Barral-Fraga

Barral

MacNeill

et al. 2020

IJERPH

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This review is focused on the biogeochemistry of arsenic in freshwaters and, especially, on the key role that benthic microalgae and prokaryotic communities from biofilms play together in through speciation, distribution, and cycling. These microorganisms incorporate the dominant iAs (inorganic arsenic) form and may transform it to other arsenic forms through metabolic or detoxifying processes. These transformations have a big impact on the environmental behavior of arsenic because different chemical forms exhibit differences in mobility and toxicity. Moreover, exposure to toxicants may alter the physiology and structure of biofilms, leading to changes in ecosystem function and trophic relations. In this review we also explain how microorganisms (i.e., biofilms) can influence the effects of arsenic exposure on other key constituents of aquatic ecosystems such as fish. At the end, we present two real cases of fluvial systems with different origins of arsenic exposure (natural vs. anthropogenic) that have improved our comprehension of arsenic biogeochemistry and toxicity in freshwaters, the Pampean streams (Argentina) and the Anllóns River (Galicia, Spain). We finish with a briefly discussion of what we consider as future research needs on this topic. This work especially contributes to the general understanding of biofilms influencing arsenic biogeochemistry and highlights the strong impact of nutrient availability on arsenic toxicity for freshwater (micro) organisms.

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Section: Microbial Biofilms In Freshwater Systemsmentioning

confidence: 99%

Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review

Barral-Fraga

Barral

MacNeill

et al. 2020

IJERPH

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“…Los procesos que originan o modifican los residuos mineros representan un fenómeno complejo que primero debe comprenderse y después atenderse, analizando diversas alternativas de remediación (Razo et al, 2007;Armienta y Segovia, 2008;Nordstrom, 2011;Lottermoser, 2011;Simate y Ndlovu, 2014;Nordstrom 2015;Gutiérrez et al, 2016). El diseño de un programa de caracterización de un sitio minero-metalúrgico contempla la toma de muestras de sedimentos, lixiviados, residuos, jales, agua superficial y/o subterránea, incluso muestras biológicas, y su análisis en el laboratorio (Castro-Larragoitia et al, 1997;Santos-Jallath et al, 2013;Carrillo-Chávez et al, 2014;Luís et al, 2015;Root et al, 2015). Los estudios de laboratorio y campo sobre residuos minero-metalúrgicos son diversos e incluyen aspectos de caracterización mineralógica: (Moreno et al, 2012;Salas, 2014;Jamieson et al, 2015), geoquímica (Lindsay et al, 2015;Klunk et al, 2015), física e hidrológica (Sán-chez-España y Diez-Ercilla, 2008; Šráček et al, 2013;Schaider et al, 2014;Amos et al, 2015), así como la caracterización de sus efluentes, que en el caso de residuos conteniendo sulfuros pueden llegar a ser los denominados Drenaje Ácido de Roca (DAR) por sus siglas en inglés (Nordstrom, 2011).…”

Section: Introductionunclassified

Caracterización y modelación hidrogeoquímica de lixiviados mineros de San Luis Potosí, S.L.P. México

Burillo

Cardona

Castro-Larragoitia

et al. 2017

BSGM

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RESUMENSe empleó la modelación hidrogeoquímica para entender las diferencias entre los lixiviados mineros y los extractos acuosos de sedimentos de arroyo y de residuos sulfurosos de un distrito minero histórico de San Luis Potosí. Tanto en los lixiviados colectados en campo como en los extractos acuosos obtenidos en laboratorio predominaron las especies de Al, Ca, Fe, SO 4 y Zn. La concentración de estas especies acuosas en los extractos de residuos fue mayor que en los sedimentos. Los residuos se presentan en dos tipos de condiciones: libres sin ningún tipo de protección y semiconfinados. La concentración en los extractos de residuos expuestos a la intemperie fue mayor que en los semiconfinados. La DRX muestra la presencia de jarosita, lo que se corresponde con los resultados de la modelación hidrogeoquímica en los extractos acuosos y lixiviados. La reacción de la calcita con los lixiviados produjo la disolución-precipitación de los minerales: gibbsita Al (OH) 3 , yeso (CaSO 4 .2H 2 O), galena (PbSO 4 ), alunita KAl 3 (OH) 6 (SO 4 ) 2 y melanterita FeSO 4 :7H 2 O, que es función de la cantidad de calcita presente y el pH de la solución. En general, el Fe existe como Fe +2 y el S como SO 4 -2 . Se modeló la mezcla entre el lixiviado minero (pH < 3) y agua de lluvia lo que produjo una solución con pH cercano al neutro. La evaporación de lixiviados forma sulfatos metálicos, principalmente yeso y melanterita. La evolución del agua del modelo fue de bicarbonatada cálcica hacia sulfatada cálcica, probablemente debido al efecto de ión común. Los extractos acuosos más contaminados provienen de los residuos mineros, que se corresponden espacialmente con los lixiviados, reflejando la capacidad limitada de los sedimentos de arroyo para retener metales. Este trabajo muestra la importancia de complementar la caracterización de residuos, en base a las normas ambientales vigentes en México, con el fin de proponer planes de remediación mejor fundamentados.Palabras clave: lixiviados mineros, San Luis Potosí, caracterización de residuos mineros, modelación hidrogeoquímica.

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“…In pollution hotspots such as those resulting from acid mine drainage (AMD), values of 0.46 mg L -1 have been documented in surface waters , and up to 65 mg kg -1 in the sediment (Luís et al 2016). Thus, the pressure imposed by Cd to communities inhabiting different areas may be quite diverse, resulting in populations with different levels of tolerance to Cd.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, the selected Cd exposure concentrations (0.1-0.5 mg L -1 ) have previously been used to assess toxicity responses in diatom assays (Nassiri et al 1997;Pistocchi et al 2000;Branco et al 2010), and present a realistic range of Cd in contaminated sites, as acid mine drainage events (Luís et al 2016). N. palea is a common benthic diatom in freshwaters, has a broad geographical distribution and is tolerant to organic pollution (van Dam et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Intraspecific differences in cadmium tolerance of Nitzschia palea (Kützing) W. Smith: a biochemical approach

et al. 2016

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Intraspecific variability occurs in all types of organisms and is a driving force to speciation, conferring genotypic and phenotypic differences that enable adaptive responses to sub-lethal stimuli such as exposure to pollutants (including cadmium, Cd). Thus, differences in biochemical parameters are expected among isolates of the same species. Studying the extent of these differences throughout a stress range, will provide information for the development of approaches to mitigate habitat contamination. This work was designed to identify possible differences in Cd tolerance of five isolates of the freshwater diatom Nitzschia palea from different sampling sites. Each isolate was exposed to five increasing Cd concentrations during 10 days. Growth inhibition was assessed and intracellular accumulation of Cd was quantified. Superoxide dismutase and catalase activities were determined. Glutathione as well as lipid peroxidation (LPO) and intracellular protein content were quantified. The results obtained identified intraspecific differences among isolates. These differences were associated with different approaches of coping with Cd stress. Higher intracellular Cd concentrations induced lower tolerance in isolates, since antioxidant mechanisms were unable to fight effectively against higher oxidative stress. Reversely, lower intracellular accumulation of Cd induced lower oxidative damage and allowed cells to better tolerate exposure to Cd. LPO emerged as an excellent marker of oxidative stress in N. palea and its use can differentiate isolates according to their tolerance.

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Integrating geochemical (surface waters, stream sediments) and biological (diatoms) approaches to assess AMD environmental impact in a pyritic mining area: Aljustrel (Alentejo, Portugal)

Cited by 35 publications

References 24 publications

Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review

Biotic and Abiotic Factors Influencing Arsenic Biogeochemistry and Toxicity in Fluvial Ecosystems: A Review

Caracterización y modelación hidrogeoquímica de lixiviados mineros de San Luis Potosí, S.L.P. México

Intraspecific differences in cadmium tolerance of Nitzschia palea (Kützing) W. Smith: a biochemical approach

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