The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Saied Reza Naddaf - One of the best experts on this subject based on the ideXlab platform.
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evaluation of hexavalent chromium reduction by chromate resistant moderately halophile nesterenkonia sp strain mf2
Process Biochemistry, 2007Co-Authors: Mohammad Ali Amoozegar, Ali Ghasemi, Mohammad Reza Razavi, Saied Reza NaddafAbstract:Abstract A Gram-positive moderately halophilic chromate reducing bacterial strain was isolated from effluents of Tanneries, and identified as Nesterenkonia sp. strain MF2 by phenotypic characterization and 16S rRNA analysis. The strain could tolerate up to 600 mM of chromate and completely reduced 0.2 mM highly toxic and soluble Cr(VI) (as CrO42−) into almost non-toxic and insoluble Cr(III) in 24 h under aerobic condition. The maximum chromate removal was exhibited in 1.5 M NaCl at 35 °C and pH 8.0. Initial Cr(VI) concentration until 0.4 mM did not have a significant effect on Cr(VI) reduction. The isolate was capable of chromate reduction in the presence of various concentrations of salts. The chromate reduction corresponded with growth of bacteria and reached a maximum level at the end of exponential phase.
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short communication evaluation of hexavalent chromium reduction by chromate resistant moderately halophile nesterenkonia sp strain mf2
2007Co-Authors: Mohammad Ali Amoozegar, Ali Ghasemi, Mohammad Reza Razavi, Saied Reza NaddafAbstract:AbstractA Gram-positive moderately halophilic chromate reducing bacterial strain was isolated from effluents of Tanneries, and identified asNesterenkonia sp. strain MF2 by phenotypic characterization and 16S rRNA analysis. The strain could tolerate up to 600 mM of chromateand completely reduced 0.2 mM highly toxic and soluble Cr(VI) (as CrO 42 ) into almost non-toxic and insoluble Cr(III) in 24 h under aerobiccondition.The maximum chromate removal was exhibited in 1.5 M NaCl at 35 8C and pH 8.0. Initial Cr(VI) concentration until 0.4 mM did not have asignificant effect on Cr(VI) reduction. The isolate was capable of chromate reduction in the presence of various concentrations of salts. Thechromate reduction corresponded with growth of bacteria and reached a maximum level at the end of exponential phase.# 2007 Elsevier Ltd. All rights reserved. Keywords: Bioremediation; Chromate reduction; Chromate removal; Moderately halophiles; Nesterenkonia; Toxic oxyanions 1. IntroductionChromate-contaminatedwastewatersaregeneratedbymanyindustries, including metallic alloys, tanning, metal platingandwood preservation [1,2]. The reduction of Cr(VI) to less toxicCr(III) is an important step in the remediation of Cr(VI)-contaminated environments. Microorganisms have shown toplay a major role in the detoxification and removal ofhexavalent chromium from the polluted sites [3]. Somechromate-resistant bacteria including Achromobacter sp. [4],Enterobacter cloaceae HO1 [5], Providencia sp. [6], Brucellasp. [7] and Bacillus sp. [8] were reported to be of Cr(VI)reduction ability under both aerobic and anaerobic conditions.High concentration of salts in wastewater treatment systemscan be a major problem for conventional biological treatments.Halophilic and halotolerant microorganisms are suitablecandidates for bioremediation processes, since high concentra-tions of anions and cations are needed for their growth [9].These microorganisms were already utilized in bioremediationof oil [10], textile effluents [11] and oxyanion pollutions [12]but no report on their potentials for bioremediation andbioreduction of chromate is available yet.This paper reports bioreduction of Cr(VI) by a newlyCr(VI)-resistant halophilic bacterial strain isolated from saltywaste of Tanneries. The isolate was identified as Nesterenkoniasp. strain MF2. It also explores the effects of various culturemedium parameters on chromate reduction.
Gwendolyn Higgins - One of the best experts on this subject based on the ideXlab platform.
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libraries archives museums fishing fisheries and canneries primary sources university of alaska fairbanks alaska and polar regions collections and archives alaska film archives
2019Co-Authors: Gwendolyn HigginsAbstract:This guide lists publicly available collections of primary source material related to fishing, fisheries, and canneries in Alaska.
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libraries archives museums fishing fisheries and canneries primary sources anchorage museum at rasmuson center archives
2019Co-Authors: Gwendolyn HigginsAbstract:This guide lists publicly available collections of primary source material related to fishing, fisheries, and canneries in Alaska.
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libraries archives museums fishing fisheries and canneries primary sources alaska state library historical collections
2019Co-Authors: Gwendolyn HigginsAbstract:This guide lists publicly available collections of primary source material related to fishing, fisheries, and canneries in Alaska.
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libraries archives museums fishing fisheries and canneries primary sources alaska state archives
2019Co-Authors: Gwendolyn HigginsAbstract:This guide lists publicly available collections of primary source material related to fishing, fisheries, and canneries in Alaska.
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libraries archives museums fishing fisheries and canneries primary sources uaa apu consortium library archives and special collections
2019Co-Authors: Gwendolyn HigginsAbstract:This guide lists publicly available collections of primary source material related to fishing, fisheries, and canneries in Alaska.
Mohammad Ali Amoozegar - One of the best experts on this subject based on the ideXlab platform.
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evaluation of hexavalent chromium reduction by chromate resistant moderately halophile nesterenkonia sp strain mf2
Process Biochemistry, 2007Co-Authors: Mohammad Ali Amoozegar, Ali Ghasemi, Mohammad Reza Razavi, Saied Reza NaddafAbstract:Abstract A Gram-positive moderately halophilic chromate reducing bacterial strain was isolated from effluents of Tanneries, and identified as Nesterenkonia sp. strain MF2 by phenotypic characterization and 16S rRNA analysis. The strain could tolerate up to 600 mM of chromate and completely reduced 0.2 mM highly toxic and soluble Cr(VI) (as CrO42−) into almost non-toxic and insoluble Cr(III) in 24 h under aerobic condition. The maximum chromate removal was exhibited in 1.5 M NaCl at 35 °C and pH 8.0. Initial Cr(VI) concentration until 0.4 mM did not have a significant effect on Cr(VI) reduction. The isolate was capable of chromate reduction in the presence of various concentrations of salts. The chromate reduction corresponded with growth of bacteria and reached a maximum level at the end of exponential phase.
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short communication evaluation of hexavalent chromium reduction by chromate resistant moderately halophile nesterenkonia sp strain mf2
2007Co-Authors: Mohammad Ali Amoozegar, Ali Ghasemi, Mohammad Reza Razavi, Saied Reza NaddafAbstract:AbstractA Gram-positive moderately halophilic chromate reducing bacterial strain was isolated from effluents of Tanneries, and identified asNesterenkonia sp. strain MF2 by phenotypic characterization and 16S rRNA analysis. The strain could tolerate up to 600 mM of chromateand completely reduced 0.2 mM highly toxic and soluble Cr(VI) (as CrO 42 ) into almost non-toxic and insoluble Cr(III) in 24 h under aerobiccondition.The maximum chromate removal was exhibited in 1.5 M NaCl at 35 8C and pH 8.0. Initial Cr(VI) concentration until 0.4 mM did not have asignificant effect on Cr(VI) reduction. The isolate was capable of chromate reduction in the presence of various concentrations of salts. Thechromate reduction corresponded with growth of bacteria and reached a maximum level at the end of exponential phase.# 2007 Elsevier Ltd. All rights reserved. Keywords: Bioremediation; Chromate reduction; Chromate removal; Moderately halophiles; Nesterenkonia; Toxic oxyanions 1. IntroductionChromate-contaminatedwastewatersaregeneratedbymanyindustries, including metallic alloys, tanning, metal platingandwood preservation [1,2]. The reduction of Cr(VI) to less toxicCr(III) is an important step in the remediation of Cr(VI)-contaminated environments. Microorganisms have shown toplay a major role in the detoxification and removal ofhexavalent chromium from the polluted sites [3]. Somechromate-resistant bacteria including Achromobacter sp. [4],Enterobacter cloaceae HO1 [5], Providencia sp. [6], Brucellasp. [7] and Bacillus sp. [8] were reported to be of Cr(VI)reduction ability under both aerobic and anaerobic conditions.High concentration of salts in wastewater treatment systemscan be a major problem for conventional biological treatments.Halophilic and halotolerant microorganisms are suitablecandidates for bioremediation processes, since high concentra-tions of anions and cations are needed for their growth [9].These microorganisms were already utilized in bioremediationof oil [10], textile effluents [11] and oxyanion pollutions [12]but no report on their potentials for bioremediation andbioreduction of chromate is available yet.This paper reports bioreduction of Cr(VI) by a newlyCr(VI)-resistant halophilic bacterial strain isolated from saltywaste of Tanneries. The isolate was identified as Nesterenkoniasp. strain MF2. It also explores the effects of various culturemedium parameters on chromate reduction.
Ali Ghasemi - One of the best experts on this subject based on the ideXlab platform.
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evaluation of hexavalent chromium reduction by chromate resistant moderately halophile nesterenkonia sp strain mf2
Process Biochemistry, 2007Co-Authors: Mohammad Ali Amoozegar, Ali Ghasemi, Mohammad Reza Razavi, Saied Reza NaddafAbstract:Abstract A Gram-positive moderately halophilic chromate reducing bacterial strain was isolated from effluents of Tanneries, and identified as Nesterenkonia sp. strain MF2 by phenotypic characterization and 16S rRNA analysis. The strain could tolerate up to 600 mM of chromate and completely reduced 0.2 mM highly toxic and soluble Cr(VI) (as CrO42−) into almost non-toxic and insoluble Cr(III) in 24 h under aerobic condition. The maximum chromate removal was exhibited in 1.5 M NaCl at 35 °C and pH 8.0. Initial Cr(VI) concentration until 0.4 mM did not have a significant effect on Cr(VI) reduction. The isolate was capable of chromate reduction in the presence of various concentrations of salts. The chromate reduction corresponded with growth of bacteria and reached a maximum level at the end of exponential phase.
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short communication evaluation of hexavalent chromium reduction by chromate resistant moderately halophile nesterenkonia sp strain mf2
2007Co-Authors: Mohammad Ali Amoozegar, Ali Ghasemi, Mohammad Reza Razavi, Saied Reza NaddafAbstract:AbstractA Gram-positive moderately halophilic chromate reducing bacterial strain was isolated from effluents of Tanneries, and identified asNesterenkonia sp. strain MF2 by phenotypic characterization and 16S rRNA analysis. The strain could tolerate up to 600 mM of chromateand completely reduced 0.2 mM highly toxic and soluble Cr(VI) (as CrO 42 ) into almost non-toxic and insoluble Cr(III) in 24 h under aerobiccondition.The maximum chromate removal was exhibited in 1.5 M NaCl at 35 8C and pH 8.0. Initial Cr(VI) concentration until 0.4 mM did not have asignificant effect on Cr(VI) reduction. The isolate was capable of chromate reduction in the presence of various concentrations of salts. Thechromate reduction corresponded with growth of bacteria and reached a maximum level at the end of exponential phase.# 2007 Elsevier Ltd. All rights reserved. Keywords: Bioremediation; Chromate reduction; Chromate removal; Moderately halophiles; Nesterenkonia; Toxic oxyanions 1. IntroductionChromate-contaminatedwastewatersaregeneratedbymanyindustries, including metallic alloys, tanning, metal platingandwood preservation [1,2]. The reduction of Cr(VI) to less toxicCr(III) is an important step in the remediation of Cr(VI)-contaminated environments. Microorganisms have shown toplay a major role in the detoxification and removal ofhexavalent chromium from the polluted sites [3]. Somechromate-resistant bacteria including Achromobacter sp. [4],Enterobacter cloaceae HO1 [5], Providencia sp. [6], Brucellasp. [7] and Bacillus sp. [8] were reported to be of Cr(VI)reduction ability under both aerobic and anaerobic conditions.High concentration of salts in wastewater treatment systemscan be a major problem for conventional biological treatments.Halophilic and halotolerant microorganisms are suitablecandidates for bioremediation processes, since high concentra-tions of anions and cations are needed for their growth [9].These microorganisms were already utilized in bioremediationof oil [10], textile effluents [11] and oxyanion pollutions [12]but no report on their potentials for bioremediation andbioreduction of chromate is available yet.This paper reports bioreduction of Cr(VI) by a newlyCr(VI)-resistant halophilic bacterial strain isolated from saltywaste of Tanneries. The isolate was identified as Nesterenkoniasp. strain MF2. It also explores the effects of various culturemedium parameters on chromate reduction.
Mohammad Reza Razavi - One of the best experts on this subject based on the ideXlab platform.
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evaluation of hexavalent chromium reduction by chromate resistant moderately halophile nesterenkonia sp strain mf2
Process Biochemistry, 2007Co-Authors: Mohammad Ali Amoozegar, Ali Ghasemi, Mohammad Reza Razavi, Saied Reza NaddafAbstract:Abstract A Gram-positive moderately halophilic chromate reducing bacterial strain was isolated from effluents of Tanneries, and identified as Nesterenkonia sp. strain MF2 by phenotypic characterization and 16S rRNA analysis. The strain could tolerate up to 600 mM of chromate and completely reduced 0.2 mM highly toxic and soluble Cr(VI) (as CrO42−) into almost non-toxic and insoluble Cr(III) in 24 h under aerobic condition. The maximum chromate removal was exhibited in 1.5 M NaCl at 35 °C and pH 8.0. Initial Cr(VI) concentration until 0.4 mM did not have a significant effect on Cr(VI) reduction. The isolate was capable of chromate reduction in the presence of various concentrations of salts. The chromate reduction corresponded with growth of bacteria and reached a maximum level at the end of exponential phase.
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short communication evaluation of hexavalent chromium reduction by chromate resistant moderately halophile nesterenkonia sp strain mf2
2007Co-Authors: Mohammad Ali Amoozegar, Ali Ghasemi, Mohammad Reza Razavi, Saied Reza NaddafAbstract:AbstractA Gram-positive moderately halophilic chromate reducing bacterial strain was isolated from effluents of Tanneries, and identified asNesterenkonia sp. strain MF2 by phenotypic characterization and 16S rRNA analysis. The strain could tolerate up to 600 mM of chromateand completely reduced 0.2 mM highly toxic and soluble Cr(VI) (as CrO 42 ) into almost non-toxic and insoluble Cr(III) in 24 h under aerobiccondition.The maximum chromate removal was exhibited in 1.5 M NaCl at 35 8C and pH 8.0. Initial Cr(VI) concentration until 0.4 mM did not have asignificant effect on Cr(VI) reduction. The isolate was capable of chromate reduction in the presence of various concentrations of salts. Thechromate reduction corresponded with growth of bacteria and reached a maximum level at the end of exponential phase.# 2007 Elsevier Ltd. All rights reserved. Keywords: Bioremediation; Chromate reduction; Chromate removal; Moderately halophiles; Nesterenkonia; Toxic oxyanions 1. IntroductionChromate-contaminatedwastewatersaregeneratedbymanyindustries, including metallic alloys, tanning, metal platingandwood preservation [1,2]. The reduction of Cr(VI) to less toxicCr(III) is an important step in the remediation of Cr(VI)-contaminated environments. Microorganisms have shown toplay a major role in the detoxification and removal ofhexavalent chromium from the polluted sites [3]. Somechromate-resistant bacteria including Achromobacter sp. [4],Enterobacter cloaceae HO1 [5], Providencia sp. [6], Brucellasp. [7] and Bacillus sp. [8] were reported to be of Cr(VI)reduction ability under both aerobic and anaerobic conditions.High concentration of salts in wastewater treatment systemscan be a major problem for conventional biological treatments.Halophilic and halotolerant microorganisms are suitablecandidates for bioremediation processes, since high concentra-tions of anions and cations are needed for their growth [9].These microorganisms were already utilized in bioremediationof oil [10], textile effluents [11] and oxyanion pollutions [12]but no report on their potentials for bioremediation andbioreduction of chromate is available yet.This paper reports bioreduction of Cr(VI) by a newlyCr(VI)-resistant halophilic bacterial strain isolated from saltywaste of Tanneries. The isolate was identified as Nesterenkoniasp. strain MF2. It also explores the effects of various culturemedium parameters on chromate reduction.
