Rahnella sp. LRP3 induces phosphate precipitation of Cu (II) and its role in copper-contaminated soil remediation

Xin, Zhao; Do, Hoaithuong; Zhou, Ye; Li, Zhe; Zhang, Xiufang; Zhao, Shujie; Li, Mingtang; Wu, Di

doi:10.1016/j.jhazmat.2019.01.029

Cited by 47 publications

(16 citation statements)

References 43 publications

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“…Nevertheless, it is noteworthy that the most abundant genera found in our samples do not belong to the traditional SRB groups: Rahnella , a facultative aerobe as well as biosurfactant-producing and heavy metal-resistant genus ( Govarthanan et al, 2017 ), was dominant in N(2), followed by obligate anaerobes Bacteroides , which are known to be proficient in degrading large molecular compounds and in reducing Fe through fermentative processes in anaerobic conditions ( Xia et al, 2019 ). The Rahnella genus was already identified and used to immobilize heavy metals in contaminated soils of mining areas ( Zhao et al, 2019 ), but to the best of our knowledge, this is the first study in which it appears as a dominant taxon in a mine-impacted freshwater environment. The coexistence of Desulfovibrio sp.…”

Section: Discussionmentioning

confidence: 99%

Microbial Diversity of Bacteria Involved in Biomineralization Processes in Mine-Impacted Freshwaters

et al. 2021

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In order to increase the knowledge about geo-bio interactions in extreme metal-polluted mine waters, we combined microbiological, mineralogical, and geochemical analyses to study the indigenous sulfate-reducing bacteria (SRB) involved in the heavy metal (HM) biomineralization processes occurring in Iglesiente and Arburese districts (SW Sardinia, Italy). Anaerobic cultures from sediments of two different mining-affected streams of this regional framework were enriched and analyzed by 16S rRNA next-generation sequencing (NGS) technique, showing sequences closely related to SRB classified in taxa typical of environments with high concentrations of metals (Desulfovibrionaceae, Desulfosporosinus). Nevertheless, the most abundant genera found in our samples did not belong to the traditional SRB groups (i.e., Rahnella, Acinetobacter). The bio-precipitation process mediated by these selected cultures was assessed by anaerobic batch tests performed with polluted river water showing a dramatic (more than 97%) Zn decrease. Scanning electron microscopy (SEM) analysis revealed the occurrence of Zn sulfide with tubular morphology, suggesting a bacteria-mediated bio-precipitation. The inocula represent two distinct communities of microorganisms, each adapted to peculiar environmental conditions. However, both the communities were able to use pollutants in their metabolism and tolerating HMs by detoxification mechanisms. The Zn precipitation mediated by the different enriched cultures suggests that SRB inocula selected in this study have great potentialities for the development of biotechnological techniques to reduce contaminant dispersion and for metal recovery.

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Section: Discussionmentioning

confidence: 99%

Microbial Diversity of Bacteria Involved in Biomineralization Processes in Mine-Impacted Freshwaters

et al. 2021

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“…Abu‐Dieyeh, Alduroobi, and Al‐Ghouti (2019) reported the isolation of mercury reducing bacteria to the remediation of mercury‐contaminated soils. Zhao, Do, et al (2019) isolated an indigenous bacterial strain LRP3, Rahnella sp from Cu‐contaminated dark brown soils. The isolated culture produced phytase and alkaline phosphatase that decomposed phytic acid to phosphate and increased the pH, which led to formation of Cu 3 (OH) 3 PO 4 crystals.…”

Section: Biological Treatmentmentioning

confidence: 99%

Hazardous wastes treatment technologies

Shih

et al. 2020

Water Environment Research

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“…15,16 Compared with conventional physicochemical methods, the bioremediation is more attractive, owing to its cost-effectiveness and lack of secondary pollution. 17 Sulfate-reducing bacteria (SRB) have attracted considerable attention in the removal of heavy metals. 1,18 SRB is a kind of chemoorganotrophic and obligate anaerobic bacterium.…”

Section: Introductionmentioning

confidence: 99%

“…It is noteworthy that microorganisms have the ability to remove heavy metals through metabolic activities, such as biosorption, biotransformation and bioaccumulation 15,16 . Compared with conventional physicochemical methods, the bioremediation is more attractive, owing to its cost‐effectiveness and lack of secondary pollution 17 …”

Section: Introductionmentioning

confidence: 99%

Bioconversion of high‐concentration chelated Cd to nano‐CdS photocatalyst by sulfate‐reducing bacteria

Liu

Wang

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: Chelated heavy metals have received wide attention due to their adverse effects and difficulty in removal. Sulfate-reducing bacteria (SRB) inducing heavy metals to produce metal sulfide precipitation is an attractive bioremediation technology. It not only reduces heavy metal pollution but also transforms metal contaminants into value-added products. RESULTS: The stable ethylenediaminetetraacetic acid (EDTA)-Cd was effectively removed and converted to CdS nanoparticles by SRB. The SRB could resist high concentrations of EDTA-Cd up to 2.5 mmol L −1 , while no growth was observed at 1.0 mmol L −1 of free cadmium ions. The bio-removal efficiencies of EDTA-Cd at initial concentrations of 0.5, 1.0, 1.5, 2.0 and 2.5 mmol L −1 were 100%, 100%, 95.89%, 67.63% and 26.66%, respectively. Meanwhile, the reduction efficiencies of sulfate by SRB were 45.6% to 24.9%. The products were cadmium sulfide nanoparticles with a mean particle size of 40-80 nm, which were confirmed by X-ray diffraction and scanning electron microscopy analyses. Furthermore, the cadmium sulfide product exhibited a good photocatalytic performance, and the removal efficiency of rhodamine B (RhB) reached 97% within 2 h. CONCLUSION: This study demonstrated that EDTA-Cd could be effectively removed by SRB and recovered in the form of highvalue cadmium sulfide photocatalyst. The proposed strategy may provide a new solution for the recycling of chelated heavy metal ions.

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Rahnella sp. LRP3 induces phosphate precipitation of Cu (II) and its role in copper-contaminated soil remediation

Cited by 47 publications

References 43 publications

Microbial Diversity of Bacteria Involved in Biomineralization Processes in Mine-Impacted Freshwaters

Microbial Diversity of Bacteria Involved in Biomineralization Processes in Mine-Impacted Freshwaters

Hazardous wastes treatment technologies

Bioconversion of high‐concentration chelated Cd to nano‐CdS photocatalyst by sulfate‐reducing bacteria

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