Bacterial Colonization on the Surface of Copper Sulfide Minerals Probed by Fourier Transform Infrared Micro-Spectroscopy

Varotsis, Constantinos; Papageorgiou, Marios; Tselios, Charalampos; Adamou, Anastasia; Nicolaides, Antonis

doi:10.3390/cryst10111002

Cited by 7 publications

(19 citation statements)

References 32 publications

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“…Moreover, the FTIR spectrum of the Gelidium corneum biomass before the bio-adsorption process shown a characteristic absorption band at ν = 1642 cm −1 owing to amidic carbonyl (C=O) or strong C=C stretching as reported by Di et al 76 . The absorption band at ν = 1542 cm −1 is attributed to the C=C stretching or amide-II (protein N–H bend, or C–N stretch) Varotsis et al 77 . Karar et al 78 , have reported the absorption band related to CH 2 -bending vibrations of the methyl group; lipids and proteins at ν = 1447 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Biosorption of cationic Hg2+ and Remazol brilliant blue anionic dye from binary solution using Gelidium corneum biomass

El‐Naggar

Hamouda

El-Khateeb

et al. 2021

Sci Rep

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Remazol brilliant blue (RBB) is an anthraquinone anionic dye that has several commercial uses, especially in the textile industries and is well-known for its detrimental impacts on marine life and the surrounding ecosystem. Mercury (Hg2+) is also one of the most severe hazardous environmental contaminants due to its bioaccumulation through the food chain and high toxicity to the human embryo and fetus. The biosorption potential of Gelidium corneum biomass for bioremoval of Hg2+ and RBB dye simultaneously from binary mixture was assessed. The effects of initial pH, contact time, Hg2+, RBB, and biomass concentrations on the biosorption process were investigated in 50 batch experiments using a Face-centered central composite design. The maximum removal percentage of Hg2+ (98.25%) was achieved in the run no. 14, under optimum experimental conditions: 200 mg/L Hg2+, 75 mg/L RBB, pH 5. At 30 °C, 4 g/L algal biomass was used, with a contact time of 180 min. Whereas, the maximum removal percentage of RBB (89.18%) was obtained in the run no. 49 using 200 mg/L Hg2+, 100 mg/L RBB, pH 5, 4 g/L algal biomass and 180 min of contact time. FTIR analysis of Gelidium corneum biomass surface demonstrated the presence of many functional groups that are important binding sites responsible for Hg2+ and RBB biosorption. SEM analysis showed apparent morphological alterations including surface shrinkage and the appearance of new shiny adsorbate ion particles on the Gelidium corneum biomass surface after the biosorption process. The EDX study reveals an additional optical absorption peak for Hg2+, confirming the role of Gelidium corneum biomass in Hg2+ biosorption. In conclusion, Gelidium corneum biomass has been shown to be an eco-friendly, sustainable, promising, cost-effective and biodegradable biosorbent to simultaneously biosorb Hg2+ and RBB dye from aquatic ecosystems.

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Section: Resultsmentioning

confidence: 99%

Biosorption of cationic Hg2+ and Remazol brilliant blue anionic dye from binary solution using Gelidium corneum biomass

El‐Naggar

Hamouda

El-Khateeb

et al. 2021

Sci Rep

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“…The study shows that genetical control mechanisms of bacteria and fungi regulate the size and shape of the nanoparticles as well as the number of nanoparticles secreted by the microorganisms. The interaction of bacteria with substrate surfaces, marble [2] and copper sulphide [3] is detailed by Sazanova et al The obtained results demonstrate that mineral secretion activity differs significantly for B. subtilis monocultures and B. subtilis-A. niger associations.…”

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confidence: 99%

“…Furthermore, the study has shown that the phase composition and morphology of the precipitated crystals is influenced by the ratio of bacterial EPS-oxalic acid concentration in the growth medium. Bacterial cell attachment to copper sulphide surfaces was investigated by Varotsis et al [3]. The research documented that the degree of CuS surface colonization by Acidithiobacillus ferrooxidans is mainly dependent on the speciation of the protein within the EPS, followed by nucleic acids and lipids.…”

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confidence: 99%

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Biominerals: Formation, Function, Properties

Cölfen

Griesshaber²,

Schmahl³

2021

Crystals

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Triggered by geochemical cycles, large-scale terrestrial processes and evolution, a tremendous biodiversity evolved over the geological record and produced proto- and metazoa with biomineralized hard tissue, characterized by unique structural designs and exquisite performance. These extraordinary structures and properties are a result of the precise control of the mineralization process by the living organism. This is directed by biomolecules forming a structural insoluble matrix acting as a scaffold for the mineral and soluble functional biomolecules, which can control the nucleation and mineralization process itself, sometimes starting before nucleation of the mineral by ion accumulation. The constructive process of the secretion of biopolymer and biomineral components is guided by the metabolic activity of cells. Organisms interact closely with the biologic and inorganic realms of their environment and generate composite materials for protection and survival. This implies the adaptation of biomaterial functionality to lifestyle and ecosystems [...]

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“…The lipid bilayer vehicles, OMVs, form a part of the lipid content in the biofilm matrix [136] since they relay the exportation of intercellular and membrane proteins, signaling molecules for interspecies communication, toxins, and nucleic acids. Lipid secretion is also important in bacterial attachment onto abiotic or biotic surfaces such as the colonization on copper sulfide minerals by Acidithiobacillus ferrooxidans [137], or intestinal substratum by…”

Section: Lipidsmentioning

confidence: 99%

Engineering biofilm matrix for efficient biofilm-mediated contaminant removal

Zaiden¹

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This graduate study has been a good character-building lesson. Never have I learn so much about my untapped capabilities. I am blessed to have worked with many brilliant minds throughout my research career. A huge appreciation to the many supervisors, and colleagues I have worked with since I was 20. All the good and bad events are the lifetime pointers that have pushed me to be better than yesterday. Thank you to my family and friends who provide me a listening ear when in times of need. Most especially to Myra Dew Baidah Ahmad, who instills grit each time I doubt myself. Lastly, I would like to acknowledge the graduate studies assistance, training opportunities, facilities and funding provided by SCELSE, Interdisciplinary Graduate Programme (IGP), National Research Foundation, and the Ministry of Education (MOE). vTable of Contents Statement of Originality……………………………………………………………………...i Supervisor Declaration Statement………………………………………………………….ii Acknowledgements .

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Bacterial Colonization on the Surface of Copper Sulfide Minerals Probed by Fourier Transform Infrared Micro-Spectroscopy

Cited by 7 publications

References 32 publications

Biosorption of cationic Hg2+ and Remazol brilliant blue anionic dye from binary solution using Gelidium corneum biomass

Biosorption of cationic Hg2+ and Remazol brilliant blue anionic dye from binary solution using Gelidium corneum biomass

Biominerals: Formation, Function, Properties

Engineering biofilm matrix for efficient biofilm-mediated contaminant removal

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