Enhanced sulfate and metal removal by reduced graphene oxide self-assembled Enterococcus avium sulfate-reducing bacteria particles

Chromium Pollution in European Water, Sources, Health Risk, and Remediation Strategies: An Overview

“…Among the gram positive bacteria, Bacillus, Deinococcus, and Arthrobacter have shown Cr (VI) reduction capability [107,150,151]. Meanwhile, Enterococcus, Shewanella, Pseudomonas, Escherichia, Thermus, and Ochrobactrum are examples of gram-negative bacteria with potential application in bioremediation [152][153][154][155][156][157]. Microbial reduction is one of the most promising routes for in situ reclamation of Cr (VI) polluted groundwater [22,158].…”

Reduction of sulfate, nitrate and nitrite ions by Desulfovibrio sp. under the influence of ferrum (III) citrate

“…It was established that in medium with the same initial content (1.74 mM) Na 2 SO 4 ×10 H 2 O and FeC 6 H 5 O 7 bacteria reduced 2.9−3.9 times more Fe(III) than sulfate ions with ferrum (II) ions production at concentration 2.2−3.6 times higher than that of the hydrogen sulfide. The efficiency of the biological methods for purifying the environment from the pollutants depends not only upon the metabolic activity of the selected strains of bacteria, but primarily upon their resistance to metal compounds [2,7,10,14,40]. Therefore, we studied the ability of these bacteria to reduce in the process of the anaerobic respiration of sulfate, nitrate or nitrite ions at a simultaneous presence in the medium of 1.74−10.41 mM FeC 6 H 5 O 7 .…”

“…The stages of sulfate reduction are catalyzed by ATP sulfurylase, APS reductase, and a number of sulfite reductases [16]. These bacteria play an important role in regulating the level of not only compounds of sulfur and carbon, but also of nitrogen and metals in the environment [2,23,33,[38][39][40]. Pollution of media by heavy metals influences on the physiological and biochemical processes which are carried out by bacteria [10,22,24,25,33].…”

“…Sulfidogenic and metal-reducing bacteria occupy close ecological niches, providing various links in a cycle of chemical elements in nature [2,40]. The structure and properties of the components of electron transport chain and enzymes, involved in the process of dissimilatory reduction of oxidized metal forms, have been intensively studied in recent years in connection with the ability of metal-reducing bacteria (Desulfovibrio, Geobacter, Desulfuromusa, Desulfuromonas, Desulfotomaculum, Shewanella, Wolinella, Pseudomonas etc.)…”

Interaction between Biocompatible Graphene Oxide and Live Shewanella in the Self-Assembled Hydrogel: The Role of Physicochemical Properties

“…On the other hand, when GO does not kill bacteria or exhibits biocompatibility, it appears as a promising carrier to immobilize bacteria or biocatalyst in the environmental biotechnology field. For example, GO can immobilize quinone compound catalysts and form a composite to promote the Cr­(VI) reduction by bacteria, , or GO can be mixed in the biofilm on the cathode of microbial fuel cells to improve the electricity generation. − Recently, GO has been found to capture individual cells and generate a self-assembly of a GO-bacteria matrix in which the biodegradation or bioreduction capacity of functional bacteria can be greatly enhanced. − Especially in our previous study, GO and Shewanella xiamenensis BC01 have been found for the first time to spontaneously generate a macroscopic hydrogel out of the liquid, named bio-rGO-hydrogels (BGHs) . The gel-forming progress was supervision-free, mild, and nontoxic compared to other self-assembled graphene-based hydrogels, as shown in Table S1.…”