2011
DOI: 10.1016/j.desal.2011.06.031
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Laboratory-scale bioreactors for soluble selenium removal from selenium refinery wastewater using anaerobic sludge

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Cited by 97 publications
(47 citation statements)
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“…Although full-scale biological systems are available for treating selenium wastewaters, due to colloidal properties, a fraction of biogenic nano-Se will remain in the treated waters, thus leaving the bioreactors with the effluent (Lenz et al, 2008;Soda et al, 2011). The present study provided for the first time experimental evidence that nano-Se b formed by the biofilms in the bioreactors is comparatively much less toxic to aquatic organisms than selenite and nano-Se c .…”
Section: Environmental Implicationsmentioning
confidence: 56%
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“…Although full-scale biological systems are available for treating selenium wastewaters, due to colloidal properties, a fraction of biogenic nano-Se will remain in the treated waters, thus leaving the bioreactors with the effluent (Lenz et al, 2008;Soda et al, 2011). The present study provided for the first time experimental evidence that nano-Se b formed by the biofilms in the bioreactors is comparatively much less toxic to aquatic organisms than selenite and nano-Se c .…”
Section: Environmental Implicationsmentioning
confidence: 56%
“…Comparison of fate and toxicity of nano-Se b with selenite and nano-Se c One major drawback of microbial bioremediation of selenium oxyanions is that a fraction of nano-Se b formed in bioreactors will remain suspended in the treated effluents leaving the bioreactors, thus nano-Se b entering the aquatic environments (Lenz et al, 2008;Soda et al, 2011). Moreover, the selenium discharge criteria for aquatic life and the proposed toxicity thresholds are highly debated in recent times (Chapman, 1999;DeForest et al, 1999).…”
Section: Discussionmentioning
confidence: 99%
“…Selenite is the main form of selenium in wastewater. The wastewater shows high salinity (6-7%) and high concentrations of sodium (up to 23 g l -1 ) and sulfur (up to 35 g l -1 ) 3) . Nitrogen and phosphorus concentrations in wastewater were negligible.…”
Section: Selenium Refinery Wastewatermentioning
confidence: 99%
“…Our research group has studied laboratory-scale bioreactors to investigate their applicability for removal of soluble selenium from refinery wastewater. Laboratory bioreactors inoculated with anaerobic sludge showed high rates of selenium removal with appropriate pre conditioning 3) . In this study, pilot-scale experiments were conducted with emphasis on bioreactors (Fig.…”
Section: Introductionmentioning
confidence: 99%
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