Toxic effects of zinc on anaerobic microbiota from Zimapán Reservoir (Mexico)

Vega-López, Armando; Amora-Lazcano, Enriqueta; López‐López, Eugenia; Terrón, Oscar; Proal-Nájera, José B.

doi:10.1016/j.anaerobe.2007.01.001

Cited by 13 publications

(10 citation statements)

References 31 publications

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“…DSRB use sulphate as electron acceptor and an energy rich carbon source as electron donor (Pfenning et al 1981), generating sulphide. This sulphide reacts additionally with certain metals dissolved in contaminated waters, such as copper, iron or zinc, forming insoluble precipitates (Vega-López et al 2007;Costa and Duarte 2005;White et al 2003) and, as a result, the concentrations of sulphates and dissolved metals are reduced.…”

Section: Introductionmentioning

confidence: 99%

Biological sulphate reduction using food industry wastes as carbon sources

et al. 2009

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Biological treatment with dissimilatory sulphate-reducing bacteria has been considered the most promising alternative for decontamination of sulphate rich effluents. These wastewaters are usually deficient in electron donors and require their external addition to achieve complete sulphate reduction. The aim of the present study was to investigate the possibility of using food industry wastes (a waste from the wine industry and cheese whey) as carbon sources for dissimilatory sulphate-reducing bacteria. The results show that these wastes can be efficiently used by these bacteria provided that calcite tailing is present as a neutralizing and buffer material. A 95 and 50 % sulphate reduction was achieved within 20 days of experiment by a consortium of dissimilatory sulphate-reducing bacteria grown on media containing waste from the wine industry or cheese whey respectively. Identification of the dissimilatory sulphate-reducing bacteria community using the dsr gene revealed the presence of the species Desulfovibrio fructosovorans, Desulfovibrio aminophilus and Desulfovibrio desulfuricans. The findings of the present study emphasise the potential of using wastes from the wine industry as carbon source for dissimilatory sulphate-reducing bacteria, combined with calcite tailing, in the development of cost effective and environmentally friendly bioremediation processes.

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Section: Introductionmentioning

confidence: 99%

Biological sulphate reduction using food industry wastes as carbon sources

et al. 2009

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“…Residual chlorine in water, e.g., mono-chloramines (NH 2 Cl) and dichloroamines (NHCl 2 ) were determined by the N, N-diethyl-p-phenylene diamine colorimetric method (American Public Health Association et al 1998a). DOC was quantified through the UV method at 275 nm using potassium biphthalate (1-KOCOC 6 H 4 -2-COOH) as standard (Vega-López et al 2007b). Bromide was determined by the phenol red colorimetric method (American Public Health Association et al 1998b).…”

Section: Study Site and Physicochemical Analysesmentioning

confidence: 99%

Evidence of Bioactivation of Halomethanes and its Relation to Oxidative Stress Response in Chirostoma riojai, an Endangered Fish from a Polluted Lake in Mexico

Vega-López¹,

Carrillo-Morales²,

Olivares-Rubio³

et al. 2011

Arch Environ Contam Toxicol

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Halomethanes (HMs) are produced autochthonously in water bodies through the action of ultraviolet light in the presence of HM precursors, such as dissolved organic carbon and halogens. In mammals, toxic effects induced by HMs are diverse and include oxidative stress, which is also induced by divalent and polyvalent metals; however, in fish little information is available on HM metabolism and its possible consequences at the population level. In the present study, high CYP 2E1 and GST theta-like activities were found in viscera of the Toluca silverside Chirostoma riojai from Lake Zumpango (LZ; central Mexico). Formaldehyde, one of the HM metabolites, was correlated with CYP 2E1 activity and also induced lipid peroxidation in viscera. Hepatic CYP 2E1 activity was correlated with GST theta-like activity, suggesting the coupling of both pathways of HM bioactivation and its consequent oxidative damage. Sediment metals, among others, were also responsible for oxidative stress, particularly iron, lead, arsenic and manganese. However, under normal environmental conditions, the antioxidant enzymes of this species sustain catalysis adapted to oxidative stress. Findings suggest that this fish species apparently has mechanisms of adaptation and recovery that enable it to confront toxic agents of natural origin, such as metals and other substances formed through natural processes, e.g., HMs. This has allowed C. riojai to colonize LZ despite the high sensitivity of this species to xenobiotics of anthropogenic origin.

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“…Although the role of Zn in DOM remineralisation has been neglected to date, some previous studies have suggested that Zn exerts a strong inhibitory effect on bacterial activity at concentrations ranging from < 5 μg Zn l -1 (Ku$pilić et al 1989, Paulsson et al 2000. In addition, Zn is related to the activities of various kinds of enzyme, such as metalloprotease (Hase & Finkelstein 1993, Ogino et al 1999, Fukuda et al 2000, and dehydrogenase (Choudhury & Srivastava 2001, Vega-López et al 2007), which would be involved in the DOM rem- ineralisation process. Considering that Zn concentrations >5 μg Zn l -1 have been reported in some coastal environments (Reddy et al 2005, Cuong et al 2008, Zn potentially alters coastal carbon cycling.…”

Section: Effect Of Zn On the Remineralisation Of Natural Dommentioning

confidence: 99%

“…Most studies on the effect of Zn on bacteria have been carried out in freshwater environments (Nweke et al 2006, Vega-López et al 2007; the results have shown a strong suppression of bacterial growth at low concentrations (> 0.1 μg Zn l -1 ), which is about an order of magnitude lower than the effective level on phytoplankton (Paulsson et al 2000). Although there have been just a few studies on the effects of Zn on marine bacterial communities (Ku$pilić et al 1989, Caroppo et al 2006, RochelleNewall et al 2008, these studies, too, have suggested that the activity of marine bacteria is also inhibited by the addition of Zn at 1 to 100 μg Zn l -1 .…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

Inhibitory effect of zinc on the remineralisation of dissolved organic matter in the coastal environment

Wada

2011

Aquat. Microb. Ecol.

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-1 ), DOM concentrations at the end of the experimental period (Day 14) increased 2.4 to 6.9%, and turnover time prolonged with a timescale of weeks to months. These potential shifts induced by Zn suggest that the allochthonous input of Zn into the coastal environment leads to suppression of energy flow in the microbial loop and enhances transport of DOM from coastal to offshore areas. KEY WORDS: Zinc · Zn · DOM · Remineralisation · Bacterial abundance Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 63: [47][48][49][50][51][52][53][54][55][56][57][58][59] 2011 higher concentrations of pollutants have been detected in coastal areas (Reddy et al. 2005, Cuong et al. 2008, Siddique et al. 2009) when compared to oceanic regions (Ellwood & Van den Berg 2000, Fukuda et al. 2000. Because some of the chemicals can alter biological activities (e.g. Pinto et al. 2003, Pereira et al. 2009), numerous researchers have focused on the toxic effects of such chemicals on organisms, including humans (e.g. Dell'Anno et al. 2003, Bielmyer et al. 2006, Thompson & Bannigan 2008, Mishra 2009). Based on their toxicity, it is recommended that the environmental concentrations of some chemicals be restricted to low levels (Bielmyer et al. 2006).Because zinc (Zn) is one of the heavy metals regarded as being less toxic to human health unless the concentration is abnormally high (Walsh et al. 1994), its concentration is loosely regulated (Water Quality Standards: 10 to 86 μg Zn l -1 ) (Chongprasith et al. 1999, Nagpal 1999, FDEP 2005, National Institute of Technology and Evaluation in Japan 2008), allowing considerable emissions of Zn from anthropogenic sources. In addition, much of the runoff of Zn occurs not only from human activity but also derives from natural environments (Hoshika & Shiozawa 1986). These findings indicate concentrations of Zn that are several orders of magnitude higher in many coastal environments when compared to other toxic heavy metals such as cadmium, copper and lead (Shitashima & Tsubota 1990, Reddy et al. 2005, Cuong et al. 2008).As mentioned above, Zn (compared with other heavy metals) is regarded as being a relatively less toxic element for humans and higher organisms, but it exerts a strong inhibitory effect on bacterial activity (Paulsson et al. 2000). Most studies on the effect of Zn on bacteria have been carried out in freshwater environments (Nweke et al. 2006, Vega-López et al. 2007; the results have shown a strong suppression of bacterial growth at low concentrations (> 0.1 μg Zn l -1 ), which is about an order of magnitude lower than the effective level on phytoplankton (Paulsson et al. 2000). Although there have been just a few studies on the effects of Zn on marine bacterial communities (Ku$pilić et al. 1989, Caroppo et al. 2006, RochelleNewall et al. 2008, these studies, too, have suggested that the activity of marine bacteria is also inhibited by the addition of Zn at 1 to 100 μg Zn l -1 . However, the impact on marine bacteria might be a little weak ...

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Toxic effects of zinc on anaerobic microbiota from Zimapán Reservoir (Mexico)

Cited by 13 publications

References 31 publications

Biological sulphate reduction using food industry wastes as carbon sources

Biological sulphate reduction using food industry wastes as carbon sources

Evidence of Bioactivation of Halomethanes and its Relation to Oxidative Stress Response in Chirostoma riojai, an Endangered Fish from a Polluted Lake in Mexico

Inhibitory effect of zinc on the remineralisation of dissolved organic matter in the coastal environment

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