Biological treatment of groundwater with a high hexavalent chromium content under anaerobic and anoxic conditions

Panousi, Eleni; Mamais, Daniel; Noutsopoulos, Constantinos; Antoniou, K.; Koutoula, Kiriaki; Mastrantoni, Sevasti; Koutsogiannis, Constantinos; Gkioni, Alexandra

doi:10.1002/jctb.4973

Cited by 13 publications

(9 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Anoxic conditions showed better reduction efficiency with increasing initial Cr(VI) concentration. The variation of initial Cr(VI) concentration on the mixed liquor volatile suspended solid production showed no change up to 1.5 mg/L of Cr(VI), but, microbial growth was inhibited up to 65 % in both the conditions for initial Cr(VI) concentrations 20 mg/L [167]. Since bioimmobilization plays a significant role on microbial growth, a series of microcosm experiments were conducted using a range of commercial electron donors on the basis of degrees of lactate polymerization (polylactate) for reduction of Cr(VI) from waste water [163].…”

mentioning

confidence: 90%

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Pradhan

Sukla

Sawyer

et al. 2017

Journal of Industrial and Engineering Chemistry

360

125

View full text Add to dashboard Cite

Hexavalent chromium (Cr(VI)) in water is a proven carcinogen to different internal and external organs of the living organisms. There are different human activities incorporated to the anthropogenic sources in the environment enriching Cr(VI) of high concentration in the water system above the regulatory level. The physical, chemical and biological properties of chromium favour the dissolution in the water environment. This concerns the environmental researcher to tackle and mitigate. Chemical or biological techniques or a combination of the two have been used to remove Cr(VI) from polluted waters. Biological techniques include integrated bioremediation, such as the primary processes of direct bioreduction and biosorption, and secondary processes of microbial fuel cell, biostimulation, surface modified dry biomass and biochar adsorption, and engineered biofilm and cell free reductase. These techniques are used by a wide range of living organisms including bacteria, fungi, plants, plant leaves, plant nuts and algae. This group of living organisms transform and remove Cr(VI) from water during the cellular metabolisms, extracellular activities, physical and chemical adsorptions on the cell surface, and photosynthesis. Variation of different physical, chemical and environmental parameters affecting the efficiency of the bioremediation process have impacted on the design of bioreactors. There has been a recent development of a microbial fuel cell which use the proximity of Cr(VI) reduction as a cathode half cell for the generation of renewable energy and simulation of its' removal from water.

show abstract

mentioning

confidence: 90%

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Pradhan

Sukla

Sawyer

et al. 2017

Journal of Industrial and Engineering Chemistry

360

125

View full text Add to dashboard Cite

show abstract

“…In order to identify the different groups of microbes that participated in Cr(VI) reduction, FISH method was employed according to the protocol described by Mamais et al [59] and Panousi et al [60]. Liquid samples were collected immediately after the Control experiment and after the biotic-abiotic Cr(VI) removal experiment.…”

Section: Analytical Proceduresmentioning

confidence: 99%

Biotic and Abiotic Biostimulation for the Reduction of Hexavalent Chromium in Contaminated Aquifers

Galani

Mamais

Noutsopoulos

et al. 2022

Water

Self Cite

View full text Add to dashboard Cite

Hexavalent chromium is a carcinogenic heavy metal that needs to be removed effectively from polluted aquifers in order to protect public health and the environment. This work aims to evaluate the reduction of Cr(VI) to Cr(III) in a contaminated aquifer through the stimulation of indigenous microbial communities with the addition of reductive agents. Soil-column experiments were conducted in the absence of oxygen and at hexavalent chromium (Cr(VI)) groundwater concentrations in the 1000–2000 μg/L range. Two carbon sources (molasses and EVO) and one iron electron donor (FeSO4·7H2O) were used as ways to stimulate the metabolism and proliferation of Cr(VI) reducing bacteria in-situ. The obtained results indicate that microbial anaerobic respiration and electron transfer can be fundamental to alleviate polluted groundwater from hazardous Cr(VI). The addition of organic electron donors increased significantly Cr(VI) reduction rates in comparison to natural soil attenuation rates. Furthermore, a combination of organic carbon and iron electron donors led to a longer life span of the remediation process and thus increased total Cr(VI) removal. This is the first study to investigate biotic and abiotic Cr(VI) removal by conducting experiments with natural soil and by applying biostimulation to modify the natural existing microbial communities.

show abstract

“…Taking into account the nutritional requirements of the microorganisms involved, the addition of an external organic carbon source is necessary to enhance Cr(VI) reduction [15]. Various carbon sources have been tested (mainly in pure rather than mixed cultures) including lactose, maltose, glucose, fructose, humic acid, sodium acetate, sugar, molasses, etc., with significant Cr(VI) reduction rates [16][17][18][19][20]. However, costs for some of these feedstocks (which serve as an electron donor) might become prohibitive in actual field applications.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Treatment of Agro-Industrial and Industrial Wastewaters: Case Studies of Cr(VI)/Second Cheese Whey and Cr(VI)/Winery Effluents

Tatoulis

Michailides

Tekerlekopoulou

et al. 2018

Water

View full text Add to dashboard Cite

Hexavalent chromium (Cr(VI)) was co-treated either with second cheese whey (SCW) or winery effluents (WE) using pilot-scale biological trickling filters in series under different operating conditions. Two pilot-scale filters in series using plastic support media were used in each case. The first filter (i.e., Cr-SCW-filter or Cr-WE-filter) aimed at Cr(VI) reduction and the partial removal of dissolved chemical oxygen demand (d-COD) from SCW or WE and was inoculated with indigenous microorganisms originating from industrial sludge. The second filter in series (i.e., SCW-filter or WE-filter) aimed at further d-COD removal and was inoculated with indigenous microorganisms that were isolated from SCW or WE. Various Cr(VI) (5-100 mg L −1) and SCW or WE (d-COD, 1000-25,000 mg L −1) feed concentrations were tested. Based on the experimental results, the sequencing batch reactor operating mode with recirculation of 0.5 L min −1 proved very efficient since it led to complete Cr(VI) reduction in the first filter in series and achieved high Cr(VI) reduction rates (up to 36 and 43 mg L −1 d −1 , for SCW and WW, respectively). Percentage d-COD removal for SCW and WE in the first filter was rather low, ranging from 14 to 42.5% and from 4 to 29% in the Cr-SCW-filter and Cr-WE-filter, respectively. However, the addition of the second filter in series enhanced total d-COD removal to above 97% and 90.5% for SCW and WE, respectively. The above results indicate that agro-industrial wastewater could be used as a carbon source for Cr(VI) reduction, while the use of two trickling filters in series could effectively treat both industrial and agro-industrial wastewaters with very low installation and operational costs.

show abstract

Biological treatment of groundwater with a high hexavalent chromium content under anaerobic and anoxic conditions

Cited by 13 publications

References 35 publications

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Recent bioreduction of hexavalent chromium in wastewater treatment: A review

Biotic and Abiotic Biostimulation for the Reduction of Hexavalent Chromium in Contaminated Aquifers

Simultaneous Treatment of Agro-Industrial and Industrial Wastewaters: Case Studies of Cr(VI)/Second Cheese Whey and Cr(VI)/Winery Effluents

Contact Info

Product

Resources

About