Factors affecting soluble selenium removal by a selenate-reducing bacterium Bacillus sp. SF-1

Kashiwa, Masami; Nishimoto, Shintaro; Takahashi, Kazuaki W.; Ike, Michihiko; Fujita, Masanori

doi:10.1016/s1389-1723(00)80051-1

Cited by 122 publications

(80 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Animal here mainly refers to earthworm because it is one of the most important soil organisms and plays an indispensable role in improving soil quality [15][16][17][18]. By their feeding, burrowing, excreting and metabolic redox material, both soil texture and nutrition content are improved.…”

Section: Mechanism Of Animal Remediationmentioning

confidence: 99%

“…For example, reduction of Cr(6) to Cr(3) is widely studied, the latter one of which is both less mobile and less toxic. Additionally, Kashiwa [16] has found that Bacillus sp. SF-1 was good at reducing high concentration of Se(6) into elemental Se.…”

Section: Valence Transformation Mechanismmentioning

confidence: 99%

“…To date, the way microbes deal with element Hg is relatively clear. In the cells of mercury-resistant bacteria there is a MerA enzyme, an enzyme that reduces Hg(2) to volatile form Hg(0) [16,17] (Fig. 3).…”

Section: Volatilization Mechanismmentioning

confidence: 99%

See 2 more Smart Citations

A critical review on the bio-removal of hazardous heavy metals from contaminated soils: Issues, progress, eco-environmental concerns and opportunities

Kang

Zhang

et al. 2010

Journal of Hazardous Materials

559

182

View full text Add to dashboard Cite

a b s t r a c tMechanism of four methods for removing hazardous heavy metal are detailed and comparedchemical/physical remediation, animal remediation, phytoremediation and microremediation with emphasis on bio-removal aspects. The latter two, namely the use of plants and microbes, are preferred because of their cost-effectiveness, environmental friendliness and fewer side effects. Also the obvious disadvantages of other alternatives are listed. In the future the application of genetic engineering or cell engineering to create an expected and ideal species would become popular and necessary. However, a concomitant and latent danger of genetic pollution is realized by a few persons. To cope with this potential harm, several suggestions are put forward including choosing self-pollinated plants, creating infertile polyploid species and carefully selecting easy-controlled microbe species. Bravely, the authors point out that current investigation of noncrop hyperaccumulators is of little significance in application. Pragmatic development in the future should be crop hyperaccumulators (newly termed as "cropaccumulators") by transgenic or symbiotic approach. Considering no effective plan has been put forward by others about concrete steps of applying a hyperaccumulator to practice, the authors bring forward a set of universal procedures, which is novel, tentative and adaptive to evaluate hyperaccumulators' feasibility before large-scale commercialization.

show abstract

Section: Mechanism Of Animal Remediationmentioning

confidence: 99%

Section: Valence Transformation Mechanismmentioning

confidence: 99%

See 1 more Smart Citation

A critical review on the bio-removal of hazardous heavy metals from contaminated soils: Issues, progress, eco-environmental concerns and opportunities

Kang

Zhang

et al. 2010

Journal of Hazardous Materials

559

182

View full text Add to dashboard Cite

show abstract

“…Selenate and selenite can be microbially reduced to elemental selenium (Se 0 ) and thereby effectively removed from solution [23][24][25][26][27]. Several bacteria, such as Enterobacter cloacea, Desulfomicrobium norvegicum, Pseudomonas spp., Rhodospirillum rubrum, Shewanella oneidensis, Thauera selenatis and Bacillus spp., isolated from environments both with and without Se contamination, have been shown to be able to reduce Se metabolically [25,[28][29][30][31][32][33]. Selenium tolerant bacteria have the ability to reduce selenium species in part due to their similarity to sulfur based compounds [34].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effects of Se Solid Phase Substitution in Jarosite Minerals Influenced by Bacterial Reductive Dissolution

2014

View full text Add to dashboard Cite

Jarosite minerals (AB 3 (TO 4 ) 2 (OH) 6 ) are iron hydroxysulfate minerals that can readily incorporate trace metals into their mineral structure. A range of metals can be incorporated into the jarosite structure, including oxyanions such as selenate (SeO 4 2− ). Selenium is a micronutrient, but is toxic in relatively low doses. Selenium is present in aqueous systems in its two oxyanion forms: selenate and selenite (SeO 3 2− ). The tetrahedral sulfate coordination site can be completely substituted for selenate in jarosite minerals (NaFe 3 (SO 4 ) x (SeO 4 ) 2-x (OH) 6 ). Bacteria have been observed to reduce Se oxyanions to both more reduced forms and insoluble elemental Se. This is a pathway for selenium immobilization at contaminated sites. This experiment investigates the reductive dissolution of two Se-jarosites (solid substitution containing high and low selenium concentrations) in the presence of Shewanella putrefaciens CN32. It was observed that both Fe(III) and selenate were metabolically reduced and released into solution through jarosite dissolution . Selenate was also found to be incorporated intracellularly and reduced to particulate Se which was released upon cell lysis. Compared to the abiotic samples, enhanced dissolution was found with both the live and dead bacteria treatments.

show abstract

“…Bacterial reduc tion of selenate and selenite into elemental selenium (Se 0 ) plays an important role in detoxification of soluble selenium in the natural environment. Elemental selenium, which has little toxicity, is easily removed from the aqueous phase because of its insoluble characteristics 2) . Therefore, this reductive process might be applied to develop wastewater treatment systems for de toxification and removal of soluble selenium (Fig.…”

Section: Introductionmentioning

confidence: 99%

Biotreatment of Selenium Refinery Wastewater Using Pilot-Scale Granular Sludge and Swim-Bed Bioreactors Augmented with a Selenium-Reducing Bacterium <i>Pseudomonas stutzeri</i> NT－I

Soda

Takahashi²,

Kagami

et al. 2012

Japanese J. Wat. Treat. Biol.

Self Cite

View full text Add to dashboard Cite

A new biological process for selenium removal from metal refinery wastewater was developed using selenate-and selenite-reducing bacteria. Bacterial reduction of selenium oxyanions into elemental selenium plays a role in soluble selenium detoxification. First, two pilot-scale anaerobic bioreactors (256 l each) were constructed. One was inoculated with granular sludge of an upflow anaerobic sludge blanket reactor (Reactor A). The other was equipped with the acrylic biomass carrier and was inoculated with suspended sludge of a sewage sludge digestion reactor (Reactor B). However, those bioreactors inoculated with anaerobic sludge failed to remove selenium. As a bioaugmentation strategy, an aerobic selenium-reducing bacterium, Pseudomonas stutzeri NT-I, was inoculated to the bioreactors with slight aeration. Regarding selenite-containing wastewater, Reactor A, where granular sludge and P. stutzeri NT-I coexisted, removed 95 % of 65 mg-Se l -1 quickly within only 2 days. Reactor B equipped with the biomass carrier and inoculated with P. stutzeri NT-I needed 5 days for 98% selenite removal. For selenate-containing wastewater, Reactor A removed only 54% of 30 mg-Se l -1 in 7 days. In stark contrast, Reactor B showed selenium removal from selenate-containing wastewater of over 90% within only 3 days. The effluent of each reactor turned deep red, indicating formation of elemental selenium, which can be removed easily from the aqueous phase because of its insoluble characteristics.

show abstract

Factors affecting soluble selenium removal by a selenate-reducing bacterium Bacillus sp. SF-1

Cited by 122 publications

References 17 publications

A critical review on the bio-removal of hazardous heavy metals from contaminated soils: Issues, progress, eco-environmental concerns and opportunities

A critical review on the bio-removal of hazardous heavy metals from contaminated soils: Issues, progress, eco-environmental concerns and opportunities

Investigating the Effects of Se Solid Phase Substitution in Jarosite Minerals Influenced by Bacterial Reductive Dissolution

Biotreatment of Selenium Refinery Wastewater Using Pilot-Scale Granular Sludge and Swim-Bed Bioreactors Augmented with a Selenium-Reducing Bacterium <i>Pseudomonas stutzeri</i> NT－I

Contact Info

Product

Resources

About