Historical trends of PCDD/Fs and CO-PCBs in a sediment core collected in Sendai Bay, Japan

Okumura, Yutaka; Yamashita, Yoh; Kohno, Y.; Nagasaka, Hiromitsu

doi:10.1016/j.watres.2004.05.012

Cited by 42 publications

(20 citation statements)

References 19 publications

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“…In Fig. 2, the reference data are grouped into: (i) contaminated areas (e.g., Miyata et al, 1995;Pieper et al, 1997;Rappe et al, 1997;Bellucci et al, 2000); (ii) coastal areas (e.g., Tyler and Millward, 1996;Dannenberg et al, 1997;Fattore et al, 1997;Koistinen et al, 1997;Wade et al, 1997;Müller et al, 1999Müller et al, , 2002Bellucci et al, 2000;Sakurai et al, 2000;Gaus et al, 2001;Sericano et al, 2001;Dalla Valle et al, 2003;Naito et al, 2003;Koh et al, 2004;Okumura et al, 2004;Eljarrat et al, 2005;Hu et al, 2005;Danis et al, 2006;Suarez et al, 2006); and (iii) internal waters (e.g., Gifford et al 1996;Rose and McKay, 1996;Schramm et al, 1997;Vartiainen et al, 1997;Isosaari et al, 2002;Ryoo et al, 2005). This accounts for generally low inputs, even if it seemed reasonable to expect higher concentrations of TCDD from the use of Agent Orange.…”

Section: Lagoonsmentioning

confidence: 99%

PCDD/Fs in sediments of Central Vietnam coastal lagoons: In search of TCDD

Piazza

Giuliani

Bellucci

et al. 2010

Marine Pollution Bulletin

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Samples from nine Central Vietnam coastal lagoons, together with three soils and sediments collected in 24 two freshwater reservoirs of the Thua Thien-Hué province, were analysed for polychlorinated dibenzo-p- 25 dioxins and dibenzofurans (PCDD/Fs). Total concentrations are low, from 192 to 2912 pg g1 and depth 26 profiles in Tam Giang-Cau Hai (TG-CH) sediment cores show only minor changes over time in PCDD/F 27 input and composition. Octachloro dibenzo-p-dioxin (OCDD) is the prevailing congener (approximately 28 90%), indicating combustion as the main PCDD/F source to these coastal systems, whereas natural forma- 29 tion might be partly responsible for the presence at depth. 2,3,7,8-Tetrachloro dibenzo-p-dioxin (TCDD), 30 largely sprayed together with Agent Orange over the study areas during the war (1961–1971), is absent 31 or very low. This result supports the hypothesis of strong degradation soon after spraying. Multivariate 32 statistical analyses account for the presence of local, short-range sources as observed in the northern part 33 of the TG-CH lagoon

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Section: Lagoonsmentioning

confidence: 99%

PCDD/Fs in sediments of Central Vietnam coastal lagoons: In search of TCDD

Piazza

Giuliani

Bellucci

et al. 2010

Marine Pollution Bulletin

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“…We also examined historical changes in the dioxin concentrations in river waters by taking into account the vertical concentration changes in a sediment core collected in Sendai Bay. Dioxin concentrations in the sediment core gradually increased from the mid-1930s to the mid-1980s, and then decreased slightly from the mid-1980s to the early 2000s 18,21 . Given the higher total concentration of 1,3,6,8-TeCDD and 1,3,7,9-TeCDD in sediments during 1986-1992 (630 pg/g dw) than during 1993-2002 (480 pg/g dw) 21 , we assumed that the inflow of 1, (Fig.3).…”

Section: Total Quantities Of Pesticidal Pcdds Entering Sendaimentioning

confidence: 97%

“…The predominant dioxin congeners detected in river water, seawater, and the sediments of Sendai Bay are 1,3,6,8-TeCDD, 1,3,7,9-TeCDD, and OCDD, whereas the concentration of 2,3,7,8-TeCDD, the most hazardous compound among PCDDs, is below the detection limit in most river water, seawater, and sediment samples 18,19,21,22 .…”

Section: Discipline: Fisheriesmentioning

confidence: 98%

“…2). The annual shipments of CNP and PCP to Miyagi Prefecture have been separately calculated by using data obtained from literature 5,18 . The concentrations of 1,3,6,8-TeCDD and 1,3,7,9-TeCDD in CNP, and the OCDD concentration in PCP varied according to when these pesticides were manufactured 13,25 .…”

Section: Discipline: Fisheriesmentioning

confidence: 99%

“…As Sendai Bay (located off the Pacific coast of northern Honshu) is the site of both wild fishery and aquaculture activities, there are growing concerns over the possible pollution of the bay's waters by dioxins derived from pesticides, and the uptake of such dioxins by marine organisms. Catch data on fish, shellfish, and seaweed in Sendai Bay have been published 5 , and previous studies investigated the sources of dioxins in Sendai Bay, bioaccumulation thereof by flatfish, yearly changes in dioxin concentrations, and the rate of dioxin inflow into Sendai Bay from the terrestrial environment via runoff and river discharge [17][18][19][20][21][22][23] . The results of these studies have shown that impurities contained in PCP and CNP (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Mass Balance of Dioxins Derived from Pesticides in Sendai Bay, Japan

Okumura

Kakehi

Yamashita

2013

JARQ

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IntroductionDioxins, polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and dioxin-like coplanar polychlorinated biphenyls (Co-PCBs) are highly hydrophobic and persistent organic pollutants. The sources of these chemicals include fly ash and exhaust gas from incinerators, industrial wastewater from pulp mills, and impurities in chlorinated pesticides. Once released into the environment, these pollutants enter aquatic environments via the hydrologic cycle.In Miyagi Prefecture -the so-called granary of Japan that borders Sendai Bay -large amounts of chloronitrophen (CNP) and pentachlorophenol (PCP) were used in the past 8 . As Sendai Bay (located off the Pacific coast of northern Honshu) is the site of both wild fishery and aquaculture activities, there are growing concerns over the possible pollution of the bay's waters by dioxins derived from pesticides, and the uptake of such dioxins by marine organisms. Catch data on fish, shellfish, and seaweed in Sendai Bay have been published 5 , and previous studies investigated the sources of dioxins in Sendai Bay, bioaccumulation thereof by flatfish, yearly changes in dioxin concentrations, and the rate of dioxin inflow into Sendai Bay from the terrestrial environment via runoff and river discharge [17][18][19][20][21][22][23] . The results of these studies have shown that impurities contained in PCP and CNP (i.e. pesticides used in rice cultivation) are the main sources of dioxin pollution in Sendai Bay 22 . The two main dioxin congeners occurring as impurities in CNP are 1,3,6,3,6, and 1,3,7,9-TeCDD; the main congener that occurs as an impurity in PCP is octa-chlorodibenzop-dioxin (OCDD) 13,25 . It has been shown that CNP and PCP applied to paddy fields account for more than 90% of PCDDs and PCDFs found in river water in Miyagi Prefecture, while incinerator exhaust gases account for AbstractWe calculated the mass balance of major congeners of dioxins derived from chloronitrophen (CNP) and pentachlorophenol (PCP) found in Sendai Bay, in order to characterize the present status of marine pollution caused by dioxins and enable the establishment of appropriate countermeasures against dioxin contamination. According to published statistics, about 58 000 t of CNP and about 22 000 t of PCP were shipped to Miyagi Prefecture over a 40-year period, and based on the these amounts of CNP and PCP, we estimated that 30.7 t of 1, 3,6,3,6,1,3,7, were introduced into the terrestrial environment as impurities contained in both pesticides. Mass balance analysis results show that most of these dioxins remained in the terrestrial environment and were not transported by runoff into Sendai Bay. Moreover, degradation mainly reduced the amount of dioxins in the terrestrial environment, instead of runoff or volatilization. Although large amounts of CNP and PCP were shipped to Miyagi Prefecture, only 0.8% of the total quantity of 1,3,6,8-TeCDD, 1,3,7,9-TeCDD, and OCDD contained in pesticides that were applied to paddy fields reached Sendai Bay via the discharge of...

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Levels, Trends, and Health Effects of Dioxins and Related Compounds in Aquatic Biota

She

Guan

et al. 2016

The Handbook of Environmental Chemistry

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The objective of this chapter is to review current knowledge of the levels, trends, and health effects of dioxins and dioxin-like compounds (DLCs) including polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polybrominated dibenzo-p-dioxins and dibenzofurans (PBDD/Fs), and polychlorinated biphenyls (PCBs) in aquatic biota, with a special focus on high trophic level species. DLCs can be released into the environment through storm runoff, air deposition, wastewater discharge from industrial processes, and leaching from landfills. To characterize their influences in biota, studies examining levels and trends of DLCs from invertebrates to vertebrates from several regions (the Arctic, North America, Asia and Europe) are reviewed. Over several decades, such studies have helped elucidate the accumulation, possible sources, metabolic fate, as well as the potential health effects of dioxins and DLCs in aquatic biota. The trophic transfer of these compounds via bioaccumulation and biomagnification can result in higher concentrations in top predators, and a wide range of toxic effects (e.g., endocrine disruption, developmental and reproductive effects, and immunotoxicity) has been reported in diverse species, especially those occupying high trophic levels, e.g., marine mammals. Because of their high trophic position and widespread distribution, marine mammals are valuable sentinel species for PCB and DLC contamination, providing insights into possible sources, transport pathways, and the distribution of these compounds on a global scale. Populationlevels effects related to contaminant-induced reproductive impairment and disease have been reported in wildlife inhabiting polluted regions, and the occurrence of mass mortalities among marine mammal populations has been linked to high body burdens of immunotoxic compounds, notably PCBs. Many affected populations have never recovered to their original levels. For many contaminant-stressed populations, the added stress of climate change is exacerbating the problem, causing shifts in food webs and increasing both the distribution and toxicity of POPs in coastal and oceanic environments. Critical data gaps and future research challenges are highlighted as areas that require further study.

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Historical trends of PCDD/Fs and CO-PCBs in a sediment core collected in Sendai Bay, Japan

Cited by 42 publications

References 19 publications

PCDD/Fs in sediments of Central Vietnam coastal lagoons: In search of TCDD

PCDD/Fs in sediments of Central Vietnam coastal lagoons: In search of TCDD

Mass Balance of Dioxins Derived from Pesticides in Sendai Bay, Japan

Levels, Trends, and Health Effects of Dioxins and Related Compounds in Aquatic Biota

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