Arsenic in contaminated waters: Biogeochemical cycle, microbial metabolism and biotreatment processes

Lièvremont, Didier; Bertin, Philippe; Lett, Marie‐Claire

doi:10.1016/j.biochi.2009.06.016

Cited by 165 publications

(92 citation statements)

References 103 publications

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“…ArsB from E. coli is an antiporter in which the neutral As(OH) 3 is exchanged for H ϩ driven by proton motive force (10). For CgAcr3-1 an equivalent role is possible, although another possibility is that it is a uniporter, where cellular efflux of the arsenite anion As(OH) 2 O Ϫ would be driven by the membrane potential, positive outside (24). As(OH) 3 is a neutral molecule at cytosolic pH (10), so efflux mechanisms in which a neutral substrate is coupled to the electrochemical proton gradient must be considered.…”

Section: Discussionmentioning

confidence: 99%

“…Most organisms have mechanisms that confer resistance to both inorganic arsenate (As(V)) 4 and arsenite (As(III)). However, cellular mechanisms involved in As(III) detoxification are more essential to cell survival due to its much higher toxicity (2). Efflux of As(III) from cells is often the primary resistance mechanism and can be catalyzed by members of three families of unrelated As(III) transporters.…”

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confidence: 99%

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Efflux Permease CgAcr3-1 of Corynebacterium glutamicum Is an Arsenite-specific Antiporter

Villadangos

Gil

et al. 2012

Journal of Biological Chemistry

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Efflux Permease CgAcr3-1 of Corynebacterium glutamicum Is an Arsenite-specific Antiporter

Villadangos

Gil

et al. 2012

Journal of Biological Chemistry

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“…Chronic arsenic exposure causes several cancerous and non-cancerous human diseases including urinary bladder, lung and liver cancer. Drinking water is the most common source for human exposure to As and the presence of this compound has therefore been declared as a major risk to human health in many regions in the world (Lièvremont et al, 2009). A possible solution for this problem is the use of plants that are able to accumulate As by removing the metalloid from water and soil through a process called phytoremediation (Zhang et al, 2009b).…”

Section: Introductionmentioning

confidence: 99%

Uptake arsenic by plants: Effects on mineral nutrition, growth and antioxidant capacity

Farnese¹,

Oliveira²,

Farnese

et al. 2014

Idesia

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Arsenic (As) is the one of the main environmental pollutant and phytoremediation is an effective tool for its removal of the environment. In this study, Pistia stratiotes were exposed to seven As concentrations (0, 3, 7, 10, 13, 16 and 20 µM) and then, the influence of this metalloid on growth, mineral nutrition and photosynthesis were analyzed. It was observed that this species have a high affinity for As and pollutant uptake occurs rapidly. The uptake of Cu, Mn, Fe and P increased until the concentration of 13 µM, decreasing in higher concentrations.The Mg content also decreased from this same concentration. No effects were observed in the uptake of K, Ca and Zn. Growth rate and photosynthetic pigments content were negatively affected by As. Despite this decrease, the growth was maintained up to the concentration of 13 µM of As. The maintenance of growth and the change in nutrients uptake are probably related with the increase in antioxidant capacity of the plant, indicating resistance to the pollutant. In this way, P. stratiotes is probably an efficient phytoremediator of As, even when in concentrations up to one hundred times greater than those permitted in water for human consumption. Key words: Aquatic plant species; environmental pollution; phytoremediation. RESUMEN El Arsénico (As) es uno de los principales contaminantes ambientales y la fitorremediación se presenta como una herramienta efectiva para retirar este elemento del medio ambiente. En el presente estudio se analizó la influencia de este elemento en el crecimiento, nutrición mineral y fotosíntesis dePistia stratiotes bajo siete concentraciones de As (0, 3, 7, 10, 13, 16 y 20 µM

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“…2, 3). Because eutrophication is higher in Caohai than in Waihai (Yang et al 2010), As (V) tends to be reduced to As (III) concomitantly with the degradation of biota-containing particulates in Caohai, which can induce anaerobic conditions only in the outer sphere of the particulates (Lievremont et al 2009). The low DO with high As (III) in Caohai and the southern edge of Waihai was consistent, whereas inconsistency was seen in low Eh with low but not high As (III) in these two lake areas (Figs.…”

Section: Resultsmentioning

confidence: 99%

Arsenic Variation in Two Basins of Lake Dianchi

Wei

Zhang

2012

Bull Environ Contam Toxicol

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The spatial variation of arsenic, including arsenic speciation changes under the influence of water quality parameters in lake Dianchi, China was investigated. The water quality parameters were found to differ between the two basins of the lake (Caohai vs. Waihai), consistent with the eutrophic status. Arsenic in Caohai was greater than that in Waihai, with average values as 9.45 and 6.68 lg L -1 , respectively. Expect redox potential, correlation between various water quality parameters and arsenic forms were found, supporting the hypothesis that arsenic partition in suspended particulates in Lake Dianchi was driven mainly by biota factor.Keywords Arsenic Á Forms Á Arsenite Á Water quality parameters Arsenic (As) is a ubiquitous but toxic element. The range of background As levels in water is 0.1-80 lg L -1 . However, the elevation of As in groundwater due to the reduction and dissolution of As-containing minerals in alluvial strata occurs in some areas of the world, causing serious detriment to human health, mainly in India, Bangladesh and China (Mandal et al. 2007). Arsenic in drinking water has been legally restricted to within 10 lg L -1 by the WHO and China to protect human health (WHO 2003). Lakes act as watershed sinks, receiving both natural and anthropogenic sources of As (Nikolaidis et al. 2004). Arsenic in the water column is equilibrated between suspended particulates and water, with sorption and desorption reactions. These reactions are influenced by various factors, such as changes of temperature, pH and redox potential, organic degradation and other reduction reactions (Couture et al. 2010). The sorption and desorption of As in lake waters have been found to be concomitant with As oxidation/reduction in the outer sphere of particulates, causing the sorption/ desorption of As between the particulate and water phases (Gao et al. 2006). Dianchi, the sixth largest fresh water lake in China, is located near Kunming city, Yunnan province. The lake covers an area of 308.6 km 2 , with an average depth of 4.4 m and an elevation of 1,887.4 m, and is separated by a dam in the north, forming two basins as Caohai and Waihai (Fig. 1). The lake is in a hypereutrophic status, with severe algae blooms occurring annually over the past two decades. The nitrogen and phosphorus contents were found to decrease gradually from the north to south, which is consistent with the eutrophic status of the lake (Hu et al. 2006). Arsenic is a chemical analogue to phosphorus, and the relationship between phosphorus with eutrophication and the interaction of As and phosphorus has been documented in many lakes (Martin and Pedersen 2004;Rahman et al. 2008). Nevertheless, the As behavior in Lake Dianchi, especially its relationship with eutrophication, has rarely been documented to date. An investigation of As in Lake Dianchi may be helpful in understanding As behavior in hypereutrophic lakes. The objective of this study was to elucidate the spatial variation of As in relation to the eutrophic status of Lake Dianchi.

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Arsenic in contaminated waters: Biogeochemical cycle, microbial metabolism and biotreatment processes

Cited by 165 publications

References 103 publications

Efflux Permease CgAcr3-1 of Corynebacterium glutamicum Is an Arsenite-specific Antiporter

Efflux Permease CgAcr3-1 of Corynebacterium glutamicum Is an Arsenite-specific Antiporter

Uptake arsenic by plants: Effects on mineral nutrition, growth and antioxidant capacity

Arsenic Variation in Two Basins of Lake Dianchi

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