Assessment of Metal Levels in Sediments and Oyster (Crassostrea gigas) Tissues from Shidugawa Bay, a Closed Japanese Aquaculture Environment

Han, Shuping; Raknuzzaman, Mohammad; Naito, Wataru; Masunaga, Shigeki

doi:10.1007/s11270-020-04666-z

Cited by 8 publications

(6 citation statements)

References 19 publications

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“…S1. Detailed analytical procedures for the moisture content and IL of the sediments have been described in our previous studies (Han et al, 2020), and the results are shown in Table S2.…”

Section: Analysis Of Physicochemical Parameters Of Sedimentsmentioning

confidence: 99%

“…Thirteen metals are correlated with clay and silt fractions in the sediments of the Persian Gulf, Iran (Jafarabadia et al, 2018). Bay (Han et al, 2020). Third, sh feeds and antifouling materials likely contributed to the increase in metals in December because a large amount of sh feed (approximately 120 tons) is applied every year in Furue Bay, and antifouling coating applications using synthetic bers and copper alloys occur twice (May-June and October-November).…”

Section: Metal Concentrations In Sedimentsmentioning

confidence: 99%

“…Prior to digestion of the sediments for metal analysis, the sediment sample was sieved using a 2 mm PVC sieve and then stored in a PE container. The digestion of the sediment for metal analysis was the same as that used in previous studies (Han et al, 2020;Simpson et al, 2013), and a microwave digestion system (Bergh Speed Wave MWS-2, Germany) was used to digest the samples. Approximately 0.2 g of sediment was placed in PTFE/TFM digestion vessels and mixed with 7 mL of HNO 3 (65%, Superpure, Kanto Chemical Co., Inc., Japan) and 1 mL of H 2 O 2 (30%, Suprapure, Kanto Chemical Co., Inc., Japan).…”

Section: Analysis Of Metals In Sedimentsmentioning

confidence: 99%

“…Toxic metals in coastal sediments can originate from both natural sources and human activities, posing a signi cant threat to the health and integrity of coastal ecosystems. Toxic metals can readily enter coastal ecosystems and tend to settle in sediments, where they can persist and accumulate in biological systems such as Paci c oysters (Crassostrea gigas) and crabs (Szefer et al, 1997;Han et al, 2020), causing biological alterations. For instance, Cu may produce intolerable stress upon the recruitment of oyster embryos, and Cu and Cd can induce embryotoxicity and genotoxicity (Mai et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Distribution and geochemical speciation of metals in the sediments of marine aquaculture areas in Japan

Han,

Tai,

Masunaga

et al. 2023

Preprint

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Metal contamination is a crucial environmental issue because of its persistence and toxicity, which can have deleterious effects on aquatic ecosystems. Coastal sediments serve as reservoirs for metals. Aquaculture is an important human activity in coastal areas; however, the actual status of metal distribution in these areas has not been well characterized. We investigated the distribution and geochemical speciation of metals in the sediments of the Japanese aquaculture areas of Shidugawa and Furue Bays. Total metals were generally in the order Zn > Cu > Ni > Cd > Pb and occurred at high levels at the sites in the inner parts and near the fish cages in the sampling areas. Pearson’s correlations and principal component analysis results suggested that the metals in these aquaculture areas might originate from several sources, such as fish faeces, fish feeds, corrosion of antifouling material residues, and local anthropogenic activities, including fertilizers and manures. Furthermore, metals were mainly in silts and fine sediments, associated with residual speciation, followed by organic fractions, oxides, and high fractions of exchangeable Cd. These results provide important insights into the accumulation of metals in sediments for better managing marine aquaculture in Japan.

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“…S1. Detailed analytical procedures for the moisture content and IL of the sediments have been described in our previous studies (Han et al, 2020), and the results are shown in Table S2.…”

Section: Analysis Of Physicochemical Parameters Of Sedimentsmentioning

confidence: 99%

Section: Metal Concentrations In Sedimentsmentioning

confidence: 99%

Section: Analysis Of Metals In Sedimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Distribution and geochemical speciation of metals in the sediments of marine aquaculture areas in Japan

Han,

Tai,

Masunaga

et al. 2023

Preprint

Self Cite

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show abstract

“…are widely used at home and abroad [ 5 , 6 ]. Although these self-polishing antifouling coatings prevent marine organisms from fouling, the coatings exert serious toxic effects on non-target marine organisms and the environment [ 7 , 8 ]. Therefore, to solve the ecotoxicological problems caused by the use of toxic antifouling coatings, designing and building green, long-lasting, excellent performance, and environmentally friendly new antifouling coatings, such as hydrophilic antifouling coatings, is imperative [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Urushiol-Based Benzoxazine Containing Sulfobetaine Groups for Sustainable Marine Antifouling Applications

et al. 2023

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Benzoxazine resins are new thermosetting resins with excellent thermal stability, mechanical properties, and a flexible molecular design, demonstrating promise for applications in marine antifouling coatings. However, designing a multifunctional green benzoxazine resin-derived antifouling coating that combines resistance to biological protein adhesion, a high antibacterial rate, and low algal adhesion is still challenging. In this study, a high-performance coating with a low environmental impact was synthesized using urushiol-based benzoxazine containing tertiary amines as the precursor, and a sulfobetaine moiety into the benzoxazine group was introduced. This sulfobetaine-functionalized urushiol-based polybenzoxazine coating (poly(U−ea/sb)) was capable of clearly killing marine biofouling bacteria adhered to the coating surface and significantly resisting protein attachment. poly(U−ea/sb) exhibited an antibacterial rate of 99.99% against common Gram negative bacteria (e.g., Escherichia coli and Vibrio alginolyticus) and Gram positive bacteria (e.g., Staphylococcus aureus and Bacillus sp.), with >99% its algal inhibition activity, and it effectively prevented microbial adherence. Here, a dual-function crosslinkable zwitterionic polymer, which used an “offensive-defensive” tactic to improve the antifouling characteristics of the coating was presented. This simple, economic, and feasible strategy provides new ideas for the development of green marine antifouling coating materials with excellent performance.

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Distribution and geochemical speciation of metals in the sediments of marine aquaculture areas in Japan

Han,

Tai,

Masunaga

et al. 2024

Environ Monit Assess

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Assessment of Metal Levels in Sediments and Oyster (Crassostrea gigas) Tissues from Shidugawa Bay, a Closed Japanese Aquaculture Environment

Cited by 8 publications

References 19 publications

Distribution and geochemical speciation of metals in the sediments of marine aquaculture areas in Japan

Distribution and geochemical speciation of metals in the sediments of marine aquaculture areas in Japan

Urushiol-Based Benzoxazine Containing Sulfobetaine Groups for Sustainable Marine Antifouling Applications

Distribution and geochemical speciation of metals in the sediments of marine aquaculture areas in Japan

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