Iron Elution from Iron and Steel Slag Using Bacterial Complex Identified from the Seawater

Tsukidate, Hidenori; Otake, Seika; Kato, Yuriko; Yoshimura, Ko; Kitatsuji, Masafumi; Yoshimura, Etsuro; Suzuki, Michio

doi:10.3390/ma14061477

Cited by 4 publications

(2 citation statements)

References 37 publications

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“…and Pseudomonas sp. facilitated the continuous elution of Fe(II) ions from pH-controlled iron and steel slags [28]. Thus, it is supposed that the formation of biofilms on steelmaking slags can drive the release of Fe(II) ions from the slags, regardless of the differences in the main components, which can promote the growth of seaweed beds.…”

Section: Discussionmentioning

confidence: 99%

Influence of Elution Characteristics of Steelmaking Slags on Major Bacterial Communities in Biofilms

Ogawa,

Mizutani,

Tanaka

et al. 2023

Coatings

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Steelmaking slags are prospective base materials for seaweed beds, resulting from a continuous process of biofouling, starting from biofilm formation and leading to growing algae. While focusing on biofilm formation, we investigated specific features of steelmaking slags when utilized as a base for seaweed beds by comparing the bacterial communities in marine biofilms between steelmaking slags and artificially produced ones. Genomic DNA was extracted from the biofilms collected on days 3 and 7, and partial 16S rRNA libraries were generated and sequenced by second-generation next-generation sequencing. The read sequences were analyzed using QIIME 2™, then heatmaps and non-metric multidimensional scaling based on the Bray–Curtis dissimilarity index in the R program. Rhodobacteraceae and Flavobacteriaceae were the most dominant family members in all samples on both days 3 and 7. However, Mariprofundus, comprising iron-oxidative bacteria, was predominantly detected in the samples of steelmaking slags on day 7. This suggested that the growth of Mariprofundus was dependent on Fe(II) ion concentration and that steelmaking slags eluted Fe(II) ions more easily than artificial slags. In contrast, Sulfurovaceae, sulfur-oxidizing bacteria, were dominantly present in all samples on day 3, but decreased by day 7, regardless of the sulfur content. It was supposed that engine oil-derived sulfur compounds strongly influenced Sulfurovaceae growth, whereas slag-derived sulfur compounds did not. Heatmap analysis indicated that the submersion period significantly influenced the bacterial communities, regardless of the differences in the main slag content ratios. Summarizing these results, the elution characteristics of steelmaking slags have the potential to influence the formation of marine biofilms, and this formation is significantly influenced by environmental conditions.

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Section: Discussionmentioning

confidence: 99%

Influence of Elution Characteristics of Steelmaking Slags on Major Bacterial Communities in Biofilms

Ogawa,

Mizutani,

Tanaka

et al. 2023

Coatings

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“…Recently, Tsukidate et al investigated the promotion of biofilm growth on materials containing high amounts of iron and found Sulfitobacter sp. colonized the surface and formed a biofilm [ 21 ]. This suggests that Sulfitobacter sp.…”

Section: Introductionmentioning

confidence: 99%

Iron Sequestration by Galloyl–Silane Nano Coatings Inhibits Biofilm Formation of Sulfitobacter sp.

et al. 2023

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Microbially-induced corrosion is the acceleration of corrosion induced by bacterial biofilms. The bacteria in the biofilms oxidize metals on the surface, especially evident with iron, to drive metabolic activity and reduce inorganic species such as nitrates and sulfates. Coatings that prevent the formation of these corrosion-inducing biofilms significantly increase the service life of submerged materials and significantly decrease maintenance costs. One species in particular, a member of the Roseobacter clade, Sulfitobacter sp., has demonstrated iron-dependent biofilm formation in marine environments. We have found that compounds that contain the galloyl moiety can prevent Sulfitobacter sp. biofilm formation by sequestering iron, thus making a surface unappealing for bacteria. Herein, we have fabricated surfaces with exposed galloyl groups to test the effectiveness of nutrient reduction in iron-rich media as a non-toxic method to reduce biofilm formation.

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Effects of marine eutrophication environment on microbial corrosion: A review

Guo,

Wang,

Zhang

et al. 2024

Marine Pollution Bulletin

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Iron Elution from Iron and Steel Slag Using Bacterial Complex Identified from the Seawater

Cited by 4 publications

References 37 publications

Influence of Elution Characteristics of Steelmaking Slags on Major Bacterial Communities in Biofilms

Influence of Elution Characteristics of Steelmaking Slags on Major Bacterial Communities in Biofilms

Iron Sequestration by Galloyl–Silane Nano Coatings Inhibits Biofilm Formation of Sulfitobacter sp.

Effects of marine eutrophication environment on microbial corrosion: A review

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