Heavy metals and accumulation rates of sediments in Osaka Bay, the Seto Inland Sea, Japan

Hoshika, Akira; Shiozawa, Takayuki

doi:10.1007/bf02109191

Cited by 17 publications

(16 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Samples with the top 1% of concentrations for these elements, which are mostly classified as outliers, are found in Osaka Bay, and the area of high concentrations near the mouth of the Yodo and Yamato Rivers is clearly due to the discharge of contaminated sediments. Hoshika and Shiozawa [27], Hoshika et al [48], and Manabe [49] reported the same results, showing large accumulations of Cr, Cu, Zn, Cd, Pb, and Hg in Osaka Bay.…”

Section: Transfer Of Materials Related To Mineral Deposits and Anthrosupporting

confidence: 65%

“…Figure 3 shows that silty sediments occur in Suo-Nada, Hiuchi-Nada, Bingo-Nada, and HarimaNada, as well as basins affected by small periodic current flows or eddies [10]. These localities are also associated with high turbidity [12,27]. Coarse sands were collected from Aki-Nada and BisanSeto-Nada, and in northeastern Iyo-Nada.…”

Section: Samples Sampling Methods and Processingmentioning

confidence: 99%

See 1 more Smart Citation

Statistical Analysis of the Spatial Distribution of Multi-Elements in an Island Arc Region: Complicating Factors and Transfer by Water Currents

Ohta

Imai

Tachibana

et al. 2017

Water

View full text Add to dashboard Cite

Abstract:The compositions and transfer processes affecting coastal sea sediments from the Seto Inland Sea and the Pacific Ocean are examined through the construction of comprehensive terrestrial and marine geochemical maps for western Japan. Two-way analysis of variance (ANOVA) suggests that the elemental concentrations of marine sediments vary with particle size, and that this has a greater effect than the regional provenance of the terrestrial material. Cluster analysis is employed to reveal similarities and differences in the geochemistry of coastal sea and stream sediments. This analysis suggests that the geochemical features of fine sands and silts in the marine environment reflect those of stream sediments in the adjacent terrestrial areas. However, gravels and coarse sands do not show this direct relationship, which is likely a result of mineral segregation by strong tidal currents and the denudation of old basement rocks. Finally, the transport processes for the fine-grained sediments are discussed, using the spatial distribution patterns of outliers for those elements enriched in silt and clay. Silty and clayey sediments are found to be transported and dispersed widely by a periodic current in the inner sea, and are selectively deposited at the boundary of different water masses in the outer sea.

show abstract

Section: Transfer Of Materials Related To Mineral Deposits and Anthrosupporting

confidence: 65%

Section: Samples Sampling Methods and Processingmentioning

confidence: 99%

Statistical Analysis of the Spatial Distribution of Multi-Elements in an Island Arc Region: Complicating Factors and Transfer by Water Currents

Ohta

Imai

Tachibana

et al. 2017

Water

View full text Add to dashboard Cite

show abstract

“…In addition, much of the runoff of Zn occurs not only from human activity but also derives from natural environments (Hoshika & Shiozawa 1986). These findings indicate concentrations of Zn that are several orders of magnitude higher in many coastal environments when compared to other toxic heavy metals such as cadmium, copper and lead (Shitashima & Tsubota 1990, Reddy et al 2005, Cuong et al 2008).…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

“…Stn Matsuyama is on the western coast of the Seto Inland Sea (Iyo-Nada), where relatively lower concentrations of Zn have been detected previously (Shitashima & Tsubota 1990). On the other hand, Stn Osaka is in a semi-enclosed area in 48 Wada & Suzuki: Effect of zinc on remineralisation in coastal waters the eastern part of the Seto Inland Sea, where there is an influx of abundant amounts of Zn together with other chemicals via major rivers (the Yodo and Yamato); these chemicals remain in the area for long periods of time (Hoshika & Shiozawa 1986).A part of each seawater sample was filtered through a cartridge filter (pore size: 0.2 μm, PES, Advantec), and subsequently concentrated by ultrafiltration (molecular cutoff: 3 kDa, Pellicon 2 Mini, Millipore). This produced concentrated, high-molecular-weight fractions from each station, ranging in size from 3 kDa to 0.2 μm.…”

mentioning

confidence: 99%

“…One important issue would be the consideration of metal speciation, because a part of the organic matter in seawater has a capacity to bind metal ions ( , while 20 to 30% of the total Zn had a free form in coastal environments (Galceran et al 2007), showing a more complex state of metal speciation in coastal environments. Considering these findings, it is important to investigate the effect of speciation on the dynamics of organic matter in the coastal environment.Another issue is to calculate the impact based on the effect of Zn alone, even though some coastal environments are subjected to inflows of various kinds of chemical, such as heavy metals and organic contaminants originating from both anthropogenic and natural sources (Hoshika & Shiozawa 1986, Reddy et al 2005, Cuong et al 2008. Considering that other kinds of chemical would also have significant effects on bacterial metabolites (e.g.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Inhibitory effect of zinc on the remineralisation of dissolved organic matter in the coastal environment

Wada

2011

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

-1 ), DOM concentrations at the end of the experimental period (Day 14) increased 2.4 to 6.9%, and turnover time prolonged with a timescale of weeks to months. These potential shifts induced by Zn suggest that the allochthonous input of Zn into the coastal environment leads to suppression of energy flow in the microbial loop and enhances transport of DOM from coastal to offshore areas. KEY WORDS: Zinc · Zn · DOM · Remineralisation · Bacterial abundance Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 63: [47][48][49][50][51][52][53][54][55][56][57][58][59] 2011 higher concentrations of pollutants have been detected in coastal areas (Reddy et al. 2005, Cuong et al. 2008, Siddique et al. 2009) when compared to oceanic regions (Ellwood & Van den Berg 2000, Fukuda et al. 2000. Because some of the chemicals can alter biological activities (e.g. Pinto et al. 2003, Pereira et al. 2009), numerous researchers have focused on the toxic effects of such chemicals on organisms, including humans (e.g. Dell'Anno et al. 2003, Bielmyer et al. 2006, Thompson & Bannigan 2008, Mishra 2009). Based on their toxicity, it is recommended that the environmental concentrations of some chemicals be restricted to low levels (Bielmyer et al. 2006).Because zinc (Zn) is one of the heavy metals regarded as being less toxic to human health unless the concentration is abnormally high (Walsh et al. 1994), its concentration is loosely regulated (Water Quality Standards: 10 to 86 μg Zn l -1 ) (Chongprasith et al. 1999, Nagpal 1999, FDEP 2005, National Institute of Technology and Evaluation in Japan 2008), allowing considerable emissions of Zn from anthropogenic sources. In addition, much of the runoff of Zn occurs not only from human activity but also derives from natural environments (Hoshika & Shiozawa 1986). These findings indicate concentrations of Zn that are several orders of magnitude higher in many coastal environments when compared to other toxic heavy metals such as cadmium, copper and lead (Shitashima & Tsubota 1990, Reddy et al. 2005, Cuong et al. 2008).As mentioned above, Zn (compared with other heavy metals) is regarded as being a relatively less toxic element for humans and higher organisms, but it exerts a strong inhibitory effect on bacterial activity (Paulsson et al. 2000). Most studies on the effect of Zn on bacteria have been carried out in freshwater environments (Nweke et al. 2006, Vega-López et al. 2007; the results have shown a strong suppression of bacterial growth at low concentrations (> 0.1 μg Zn l -1 ), which is about an order of magnitude lower than the effective level on phytoplankton (Paulsson et al. 2000). Although there have been just a few studies on the effects of Zn on marine bacterial communities (Ku$pilić et al. 1989, Caroppo et al. 2006, RochelleNewall et al. 2008, these studies, too, have suggested that the activity of marine bacteria is also inhibited by the addition of Zn at 1 to 100 μg Zn l -1 . However, the impact on marine bacteria might be a little weak ...

show abstract

Scavenging processes of marine particles in Osaka Bay

Montani

Mishima

Okaichi

1991

Marine Pollution Bulletin

View full text Add to dashboard Cite

Heavy metals and accumulation rates of sediments in Osaka Bay, the Seto Inland Sea, Japan

Cited by 17 publications

References 15 publications

Statistical Analysis of the Spatial Distribution of Multi-Elements in an Island Arc Region: Complicating Factors and Transfer by Water Currents

Statistical Analysis of the Spatial Distribution of Multi-Elements in an Island Arc Region: Complicating Factors and Transfer by Water Currents

Inhibitory effect of zinc on the remineralisation of dissolved organic matter in the coastal environment

Scavenging processes of marine particles in Osaka Bay

Contact Info

Product

Resources

About