Temporal Change of Polychlorinated Dibenzo-p-Dioxins, Dibenzofurans and Dioxin Like Polychlorinated Biphenyls Source in Paddy Soils.

Seike, Nobuyasu; Otani, Takashi; Ueji, Masako; Takasuga, Takumi; Tsuzuki, Nobuyuki

doi:10.5985/jec.13.117

Cited by 38 publications

(17 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Profiles of individual 2,3,7,8-substituted PCDD/F congeners to total concentrations in selected dioxin sources: (a) kaolin clay, data from this study; (b) pentachlorophenol (PCP), data from ref ; (c) chloronitrophen (CNP), data from ref ; (d) PCB, data from ref ; (e) flue gas, data from ; (f) fly ash, data from ref . Gray and white bars represent PCDD and PCDF congeners, respectively.…”

Section: Resultsmentioning

confidence: 99%

Distribution, Characteristics, and Worldwide Inventory of Dioxins in Kaolin Ball Clays

Horii

Ohtsuka

Minomo

et al. 2011

Environ. Sci. Technol.

View full text Add to dashboard Cite

Distribution, characteristics, and global inventory of dioxins (polychlorinated dibenzo-p-dioxins [PCDDs] and dibenzofurans [PCDFs] and dioxin like polychlorinated biphenyls) in kaolin clays collected from 10 countries were investigated. Dioxins were found in all kaolin clay samples analyzed, at total concentrations ranging from 1.2 pg/g (Brazil) to 520,000 pg/g (USA). Dioxin concentrations in kaolin clays from a few countries (e.g., Brazil and UK) were lower than those reported for background soils in Japan. Dioxin profiles in kaolin clays were characterized by the domination of the congener octachlorodibenzo-p-dioxin (OCDD), and the concentrations of other congeners decreased in the order of reduction in the levels of chlorination. Furthermore, specific distribution of congeners, with predominant proportions of 1,4,6,9-substituted PCDDs within each homologue group, was found in most clay samples. The ratios of concentrations of PCDD to PCDF and 1,2,3,7,8,9-HxCDD to 1,2,3,6,7,8-HxCDD indicated differences in the profiles found for anthropogenic sources (including pentachlorophenol) and kaolin clays. Concentrations of PCDD/Fs in kaolin clays, except for American ball clays, did not exceed the environmental criteria set by the Law Concerning Special Measures against Dioxins in Japan. Based on the average concentrations measured in our study, inventories of PCDD/Fs from the production/usage of ball clays on a global scale were estimated to be 650 kg/yr; the corresponding value on a TEQ basis is 2400 g-TEQ/yr. More than 480 kg of OCDD is estimated to be released annually from the production of kaolin clays worldwide, suggesting that kaolin clays can be a major contributor for additional source of dioxins, especially OCDD, in the environment.

show abstract

Section: Resultsmentioning

confidence: 99%

Distribution, Characteristics, and Worldwide Inventory of Dioxins in Kaolin Ball Clays

Horii

Ohtsuka

Minomo

et al. 2011

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…This range approached PCDD/F concentrations in Japanese PCP-Na produced by the hexachlorobenzene method (Seike et al, 2003). As for the congener pattern OCDD was the predominant congener, (OCDD > 1,2,3,4,6, 7,8-HpCDD > OCDF > 1,2,3,4,6,7,8-HpCDD).…”

Section: Pcp-namentioning

confidence: 76%

Potential source and emission analysis of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in China

et al. 2008

View full text Add to dashboard Cite

a b s t r a c tThe Chinese Government ratified the Stockholm Convention on Persistent Organic Pollutants (POPs) on 25 June 2004. As a party to the Convention, China is preparing its National Implementation Plan (NIP), which must be finished and submitted to the Conference of the Parties before November 11, 2006. The emission inventory and strategy for reducing unintentionally formed products is a very complex and difficult part of the NIP. In this paper, we analyzed the potential sources of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in China and calculated their possible emissions. We included municipal solid waste incineration, hazardous and medical waste incineration, pulp bleaching, sodium pentachlorophenate production and usage, illegal electrical and electronic waste (''e-waste") recycling, and ferrous and non-ferrous metal production, and prepared a preliminary analysis of dioxin emissions in China. The results show that ferrous metal production (104.2-6648.3 g TEQ), non-ferrous metal production (2.6-3389.8 g TEQ), and sodium pentachlorophenate production and usage (120-368.0 g TEQ) should be major potential sources of dioxins and furans. Moreover, municipal solid waste and hazardous and medical waste incineration (35.5 g TEQ) should also be considered high priority sources owing to a rapidly increasing incineration ratio anticipated for the near future.

show abstract

“…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 . For this study, we used published the concentrations 13 and calculated the quantities of 1,3,6,8-TeCDD and 1,3,7,9-TeCDD released annually into the terrestrial environment, by multiplying the annual shipment amounts of CNP by the concentrations of 1,3,6,8-TeCDD and 1,3,7,9-TeCDD in CNP (Table 1, step 1).…”

Section: Discipline: Fisheriesmentioning

confidence: 99%

“…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 …”

Section: Introductionmentioning

confidence: 99%

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

Okumura

Kakehi

Yamashita

2013

JARQ

View full text Add to dashboard Cite

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...

show abstract

Temporal Change of Polychlorinated Dibenzo-p-Dioxins, Dibenzofurans and Dioxin Like Polychlorinated Biphenyls Source in Paddy Soils.

Cited by 38 publications

References 13 publications

Distribution, Characteristics, and Worldwide Inventory of Dioxins in Kaolin Ball Clays

Distribution, Characteristics, and Worldwide Inventory of Dioxins in Kaolin Ball Clays

Potential source and emission analysis of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in China

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

Contact Info

Product

Resources

About