Simultaneous chromium(VI) reduction and phenol degradation in an anaerobic consortium of bacteria

Chirwa, Evans M.N.; Wang, Yi‐Tin

doi:10.1016/s0043-1354(99)00363-2

Cited by 106 publications

(61 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the case of heavy metal bioremediation through bioreduction, the microorganisms involved could also use other organic xenobiotics as electron donor or growth source, independent of bioreduction [9,10]. Previously, a molybdenum-reducing bacterium has been shown to grow on a detergent, i.e.…”

Section: Introductionmentioning

confidence: 99%

Assessing Resistance and Bioremediation Ability of Enterobacter sp. Strain Saw-1 on Molybdenum in Various Heavy Metals and Pesticides

Sabullah

Rahman

Ahmad

et al. 2017

J. Math. Fund. Sci.

View full text Add to dashboard Cite

Abstract. One of the most economical approaches for removal of toxic compounds is bioremediation. In the long term, bioremediation is economic and feasible compared to other methods, such as physical or chemical methods. A bacterium that can efficiently reduce molybdenum blue was isolated from polluted soil. Biochemical analysis revealed the identity of the bacterium as Enterobacter sp. strain Saw-1. The growth parameters for optimal reduction of molybdenum to Mo-blue or molybdenum blue, a less toxic product, were determined around pH 6.0 to 6.5 and in the range of 30 to 37 ℃, respectively. Glucose was selected as preferred carbon source, followed by sucrose, maltose, l-rhamnose, cellobiose, melibiose, raffinose, d-mannose, lactose, glycerol, dadonitol, d-mannitol, l-arabinose and mucate. Phosphate and molybdate were critically required at 5.0 mM and 10 mM, respectively. The scanning absorption spectrum acquired to detect the development of complex Mo-blue showed similarity to previously isolated Mo-reducing bacteria. In addition, the spectrum closely resembled the molybdenum blue from the phosphate determination method. Heavy metals, including mercury, copper (II) and silver (I), inhibited reduction. Moreover, the bacterium also showed capability of exploiting the pesticide coumaphos as an alternative carbon source for growth. As the bacterium proved its ability to detoxify organic and inorganic xenobiotics, the usefulness of this microorganism for bioremediation is highlighted.

show abstract

Section: Introductionmentioning

confidence: 99%

Assessing Resistance and Bioremediation Ability of Enterobacter sp. Strain Saw-1 on Molybdenum in Various Heavy Metals and Pesticides

Sabullah

Rahman

Ahmad

et al. 2017

J. Math. Fund. Sci.

View full text Add to dashboard Cite

show abstract

“…The removal of molybdenum through bioremediation especially bioreduction is potentially the most economical approach in the long term (Lim et al, 2014), and several molybdenum-reducing bacteria have been reported (Shukor and Syed, 2010;Ahmad et al, 2013;Masdor et al, 2015). Heavy metals reduction coupled with xenobiotic degradation has been reported (Chirwa and Wang, 2000;Chung et al, 2007). For example, two molybdenum-reducing bacteria with the ability to utilize sodium dodecyl sulfate (SDS) as the sole carbon have been isolated Masdor et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

ISOLATION AND CHARACTERIZATION OF A MOLYBDENUM-REDUCING AND GLYPHOSATE-DEGRADING Klebsiella oxytoca STRAIN SAW-5 IN SOILS FROM SARAWAK

et al. 2016

View full text Add to dashboard Cite

Bioremediation of pollutants including heavy metals and xenobiotics is an economic and environmentally friendly process. A novel molybdenum-reducing bacterium with the ability to utilize the pesticide glyphosate as a carbon source is reported. The characterization works were carried out utilizing bacterial resting cells in a microplate format. The bacterium reduces molybdate to Mo-blue optimally between pH 6.3 and 6.8 and at 34 o C. Glucose was the best electron donor for supporting molybdate reduction followed by lactose, maltose, melibiose, raffinose, d-mannitol, d-xylose, l-rhamnose, l-arabinose, dulcitol, myo-inositol and glycerol in descending order. Other requirements include a phosphate concentration at 5.0 mM and a molybdate concentration between 20 and 30 mM. The molybdenum blue exhibited an absorption spectrum resembling a reduced phosphomolybdate. Molybdenum reduction was inhibited by mercury, silver, cadmium and copper at 2 ppm by 45.5, 26.0, 18.5 and 16.3%, respectively. Biochemical analysis identified the bacterium as Klebsiella oxytoca strain Saw-5. To conclude, the capacity of this bacterium to reduce molybdenum into a less toxic form and to grow on glyphosate is novel and makes the bacterium an important instrument for bioremediation of these pollutants.

show abstract

“…In contrast, Cr(III) is relatively insoluble in an aqueous systems and exhibits no toxicity (Ku et al, 2001;Jiang et al, 2006;Xu et al, 2006). The wastewater of pesticide manufacture, including animal poisons, insecticides, fungicides and herbicides, commercially manufacturing, blending, mixing or formulating pesticides usually contain both Chromium and TEP (Chirwa et al, 2000;Kozlova et al, 2004).…”

Section: Adsorption Measurementsmentioning

confidence: 99%

“…The pervious works show that final products of organophosphate degradation are phosphate, carbon dioxide and water. Moreover, several reports have been presented for the reduction of Cr(VI); the effects of important parameters such as pH values (Chirwa et al, 2000), titanium dioxide (TiO 2 ) dosage (Khalil et al, 1998), light intensities, dissolved oxygen levels and other operating conditions were investigated (Chenthamarakshan et al, 2000;Colon et al, 2001;Uyguner and Bekbolet, 2004;Wang et al, 2008). There is not any report on type of kinetic reaction rate and effect of different parameters on the TEP photocatalytic reaction rate.…”

Section: Adsorption Measurementsmentioning

confidence: 99%

Decontamination of hexavalent chromium and tri-ethyl phosphate stimulants through photacatalytic oxidation

Fathizadeh

Fakhraee

Aroujalian

2011

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

ABSTRACT:In this paper, the photocatalytic decontamination of hexavalent chromium and tri-ethyl phosphate, two important wastewater contaminants, are studied by the ultraviolet / nano-titanium dioxide process. The pH value and synergic effect between the oxidation of tri-ethyl phosphate and the reduction of hexavalent chromium were investigated in different concentrations of tri-ethyl phosphate and hexavalent chromium. Furthermore, the effects of ultraviolet and nano-titanium dioxide were investigated in a solution which contained tri-ethyl phosphate and hexavalent chromium. Results of adsorptions showed that hexavalent chromium was adsorbed better in acidic pH while the better adsorption for tri-ethyl phosphate was occurred in alkalinity pH. The reduction rate of hexavalent chromium was higher in acidic solutions while it was obtained at natural pH for tri-ethyl phosphate. In co-adsorption of hexavalent chromium and triethyl phosphate pollutants, tri-ethyl phosphate slightly increased adsorption of hexavalent chromium, but hexavalent chromium had no influence on the adsorption of tri-ethyl phosphate on nano-titanium dioxide particles. In contrast, triethyl phosphate has an improving effect on the reduction reaction rate of hexavalent chromium which increases with the interaction of the concentration of tri-ethyl phosphate in mixture. The same is true for the oxidation rate of tri-ethyl phosphate.

show abstract

Simultaneous chromium(VI) reduction and phenol degradation in an anaerobic consortium of bacteria

Cited by 106 publications

References 20 publications

Assessing Resistance and Bioremediation Ability of Enterobacter sp. Strain Saw-1 on Molybdenum in Various Heavy Metals and Pesticides

Assessing Resistance and Bioremediation Ability of Enterobacter sp. Strain Saw-1 on Molybdenum in Various Heavy Metals and Pesticides

ISOLATION AND CHARACTERIZATION OF A MOLYBDENUM-REDUCING AND GLYPHOSATE-DEGRADING Klebsiella oxytoca STRAIN SAW-5 IN SOILS FROM SARAWAK

Decontamination of hexavalent chromium and tri-ethyl phosphate stimulants through photacatalytic oxidation

Contact Info

Product

Resources

About