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Naresh Kumar Romain Millot Fabienne Battaglia-Brunet Philippe Négrel Ludo Diels Jérôme Rose Leen Bastiaens 《Chemosphere》2013,90(4):1366-1371
In the present study, controlled laboratory column experiments were conducted to understand the biogeochemical changes during the microbial sulfate reduction. Sulfur and oxygen isotopes of sulfate were followed during sulfate reduction in zero valent iron incubated flow through columns at a constant temperature of 20 ± 1 °C for 90 d. Sulfur isotope signatures show considerable variation during biological sulfate reduction in our columns in comparison to abiotic columns where no changes were observed. The magnitude of the enrichment in δ34S values ranged from 9.4‰ to 10.3‰ compared to initial value of 2.3‰, having total fractionation δS between biotic and abiotic columns as much as 6.1‰. Sulfur isotope fractionation was directly proportional to the sulfate reduction rates in the columns. Oxygen isotopes in this experiment seem less sensitive to microbial activities and more likely to be influenced by isotopic exchange with ambient water. A linear relationship is observed between δ34S and δ18O in biotic conditions and we also highlight a good relationship between δ34S and sulfate reduction rate in biotic columns. 相似文献
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Yannick Mamindy-Pajany Charlotte Hurel Florence Géret François Galgani Fabienne Battaglia-Brunet Nicolas Marmier Michèle Roméo 《Chemosphere》2013,90(11):2730-2736
This work investigates arsenic mobility, bioavailability and toxicity in marine port sediments using chemical sequential extraction and laboratory toxicity tests. Sediment samples were collected from two different Mediterranean ports, one highly polluted with arsenic and other inorganic and organic pollutants (Estaque port (EST)), and the other one, less polluted, with a low arsenic content (Saint Mandrier port (SM)). Arsenic distribution in the solid phase was studied using a sequential extraction procedure specifically developed for appraising arsenic mobility in sediments. Toxicity assessment was performed on sediment elutriates, solid phases and aqueous arsenic species as single substance using the embryo-toxicity test on oyster larvae (Crassostrea gigas) and the Microtox test with Vibrio fischeri. Toxicity results showed that all sediment samples presented acute and sub-chronic toxic effects on oyster larvae and bacteria, respectively. The Microtox solid phase test allow to discriminate As-contaminated samples from the less contaminated ones, suggesting that toxicity of whole sediment samples is related to arsenic content. Toxicity of dissolved arsenic species as single substance showed that Vibrio fischeri and oyster larvae are most sensitive to As(V) than As(III). The distribution coefficient (Kd) of arsenic in sediment samples was estimated using results obtained in chemical sequential extractions. The Kd value is greater in SM (450 L kg?1) than in EST (55 L kg?1), indicating that arsenic availability is higher for the most toxic sediment sample (Estaque port). This study demonstrates that arsenic speciation play an important role on arsenic mobility and its bioavailability in marine port sediments. 相似文献
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Bertin Philippe N. Crognale Simona Plewniak Frédéric Battaglia-Brunet Fabienne Rossetti Simona Mench Michel 《Environmental science and pollution research international》2022,29(7):9462-9489
Environmental Science and Pollution Research - Owing to their roles in the arsenic (As) biogeochemical cycle, microorganisms and plants offer significant potential for developing... 相似文献
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Battaglia-Brunet F. Foucher S. Morin D. Ignatiadis I. 《Water, Air, & Soil Pollution: Focus》2004,4(4-5):127-135
Water, Air, &; Soil Pollution: Focus - A biological method for the reduction Cr(VI), using sulphate-reducing bacteria (SRB), was tested in 2-L then 20-L fixed-bed reactors, with H2 as a low-cost... 相似文献
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Dictor MC Battaglia-Brunet F Morin D Bories A Clarens M 《Environmental pollution (Barking, Essex : 1987)》1997,97(3):287-294
The treatment of a cyanidation effluent containing thiocyanate, free cyanide, and complexed cyanide was continuously performed for a period of 6 months. Activated carbon, pozzolana, and a mixture of pumice stone and zeolite were tested as supports in fixed bed reactors. Activated carbon adsorbed the different forms of cyanide. In contrast, the other supports did not remove any pollutants from the effluent during an adsorption experiment. All supports successfully allowed fixation of bacteria. More than 90% of the thiocyanate was biologically decomposed into NH4+, CO2 and SO4(2-), even when increasing the feed flow-rate and the pollutant concentrations. Free and complexed cyanides were eliminated, probably through a combination of precipitation and biological degradation. The oxidation of ammonium into nitrate was only performed by the activated carbon-containing column and with the more diluted feeding. The nitrification process was inhibited in all reactors when the cyanide concentrations and feed flow-rates were increased. 相似文献
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