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Influence of combustion-originated Dioxins in atmospheric deposition on water quality of an urban river in Japan

Journal of Environmental Sciences 2018年第2期30卷 245-251页

作者： Kotaro Minomo Nobutoshi Ohtsuka Kiyoshi Nojiri Rie Matsumoto Center for Environmental Science in Saitama Kazo Saitama 347-0115 Japan

Bulk（wet and dry） deposition samples were collected in Saitama Prefecture, Japan throughout a year（February 8, 2012 to February 7, 2013） to estimate the influence of Dioxins emitting from waste incinerators on river water quality. The annual deposition flux of Dioxins was 3.3 ng-toxic equivalent（TEQ）/m^2/year. Source identification using indicative congeners estimated that 82% of dioxin TEQ in the bulk deposition（2.7 ng-TEQ/m^2/year）was combustion-originated, indicating that most of the Dioxins in the deposition were derived from waste incinerators. In Saitama prefecture the annual flux of combustionoriginated Dioxins in depositions was apparently consistent with that of dioxin emission into the air from waste incinerators. The TEQ of combustion-originated Dioxins in the deposition per rainfall was 2.4 pg-TEQ/L on annual average, exceeding the environmental quality standard（EQS） for water in Japan of 1 pg-TEQ/L. This suggests there is a possibility that Dioxins in atmospheric deposition have a significant influence on the water quality of urban rivers which rainwater directly flows into because of many paved areas in the basins.The influence of combustion-originated dioxin in the deposition on the water quality of Ayase River, an urban river heavily polluted with Dioxins, was estimated at 0.29 pg-TEQ/L on annual average in 2015. It seems that Dioxins in atmospheric deposition from waste incinerators have a significant influence on water quality of some urban rivers via rainwater though the Dioxins in the ambient air have achieved the EQS for atmosphere at all monitoring sites in Japan.

关键词： Dioxins Waste incineration Atmospheric deposition Urban river River water Source identification Indicative congener

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Characteristics of air pollution by polychlorinated dibenzo-p-Dioxins and dibenzofurans in the typical industrial areas of Tangshan City,China

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Journal of Environmental Sciences 2011年第2期23卷 228-235页

作者： Zhiyuan Ren Bing Zhang Pu Lu Cheng Li Lirong Gao Minghui Zheng Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China.

The ambient air in vicinity of different industrial sources for PCDD/PCDFs was sampled by TSP/PM10 active samplers and passive PUF disk samplers in Tangshan City, a metropolis containing clusters of various industrial plants. The TEQ concentrations of PCDD/PCDFs ranged from 44.2 to 394.1 fg I-TEQ/m^3 with an average of 169.9 fg I-TEQ]m^3. 2,3,4,7,8-PeCDF was the dominant contributor to ∑TEQ, contributing 41% （12% to 55%）, while 1,2,3,4,6,7,8-HpCDE OCDD and OCDF were the major congeners for the total concentrations. The ratios of ∑PCDF/∑PCDD reached 2.54 on average, suggesting that de novo synthesis in thermal processes played an important role to the airborne pollution of PCDD/PCDFs. The similarities congener profiles indicated that TSP and PM10 active sampling methods are comparable for the determination of the PCDD/PCDFs in ambient air, and the ratios of concentrations determined by the two methods suggested that the PCDD/PCDFs tended to stay in fine particles. It was found that 2,3,7,8-TCDF and OCDD were the dominating congeners in the passive PUF disks samples. Through principal components analysis, the coke industry was suggested to be a relatively high potential emission source for PCDD/PCDFs in the ambient air of Tangshan, which was possibly formed by de novo synthesis mechanism. In this study, the atmospheric impacts to the environment from different industrial sources could be ranked as follows （from high to low）： coking, iron sintering, steel making, power generation and chlorinate alkali chemical production industries.

关键词： ambient air Dioxins inhalable particles total suspended particles metropolis

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排放源及周围环境空气中二噁英类污染状况研究

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分析测试学报 2008年第S1期27卷 114-115,119页

作者：巩宏平刘劲松潘荷芳钟光剑杨寅森浙江省环境监测中心浙江杭州310012

Flue gas of emission source and ambient air samples were collected and analyzed.Dioxins concentrations in flue gas and air samples ranged from 0.56 to 1.90 ngI-TEQ/m3 with average of 1.30 ngI-TEQ/m3 and from 0.11 to 0.36 pgI-TEQ/m3 with average of 0.20 pgI-TEQ/m3,respectively.Dioxins congener profiles were compared using three methods and potential relationship of the two types of samples were discussed.

关键词： Dioxins ambient air emission source

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Study on Catalytic Decomposition of Dioxins by Supported CeO_2-TiO_2-V_2O_5 Composite Catalyst

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Journal of Rare Earths 2007年第S1期25卷 232-235页

作者：邵丹刘广福韩庆刘奎仁 Northeastern University School of Materials &Metallurgy

Loaded on the cordierite, the rare earth doped composite catalyst was prepared by sol-gel method combined with dipping technique. Taking Orthodichlorobenzene as model, the catalyst was used to remove the Dioxins of the waste gas. The results showed that at 280 ℃ and gas space velocity being 8000 h-1, the orthodichlorobenzene could be removed effectivily by the prepared CeO-TiO2-V2O5 composite catalyst whose activity was remarkably enhanced by the doping of Ce, while the industrial side-stream test of Dioxins from refuse incineration smoke indicated that the decomposition rate could reach above 93% under the same conditions.

关键词： orthodichlorobenzene Dioxins catalytic oxidation refuse incineration rare earths

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Capacity estimation and preliminary strategy for reducing the release of Dioxins in China

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Frontiers of Environmental Science & Engineering 2007年第1期1卷 13-17页

作者： YU Gang ZHANG Qing HUANG Jun CAI Zhenxiao SUI Qian POPs Research Center Department of Environmental Science and EngineeringTsinghua UniversityBeijing 100084China

As a party of the Stockholm Convention on Per-sistent Organic Pollutants,China must submit its national implementation plan(NIP)for this convention.The strategy and action plan for reducing the release of Dioxins in China are the most important components of the NIP.Three prob-lems are key points for developing such strategy and action plan-what are the key sources for applying the best avail-able technology/best environmental practice(BAT/BEP)to reduce the release of Dioxins?How about the capacity for reducing the Dioxins release from the key sources?Where are the areas of priority for applying BAT/BEP?This paper shows the efforts towards the solution of these problems.The list of key sources covering about half of the total Dioxins release was determined considering four criteria.The capacity of key sources were estimated based on the difference between the emission factor corresponding to the actual situation in 2004 and that corresponding to the scenario that all key sources have been applied BAT/BEP to reduce the Dioxins release.The priority analysis using the geographical information system(GIS)tool has revealed that eastern provinces should be of high priority in the future reduction activities of Dioxins release in China.

关键词： Dioxins reduction capacity,priority

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Gas-particle partitioning of polychlorinated dibenzo-p-Dioxins and dibenzofurans in the sintering process

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Baosteel Technical Research 2011年第3期5卷 59-64页

作者： YU Yongmei HE Xiaolei LI Xianwei Ironmaking and Sustainability Division Research Institute Baoshan Iron ＆ Steel Co.Ltd. Shanghai 201900 China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences ChineseAcademy of Sciences Beijing 100085 China

The distribution of seventeen gaseous and particle-bound 2,3,7,8-substituted chlorinated PCDD/Fs in the flue gas of different windboxes of the sintering machine was analyzed. The influence of temperature change on the PCDD/Fs emission from the sintering process and the formation mechanism of PCDD/Fs were discussed. The result has shown that among the seventeen gaseous and particle-bound PCDD/Fs in the flue gas of different windboxes, furans occupied the major place. The proportion of the gaseous PCDD/Fs in most windboxes is from 40% to 60%. The change tendencies of the concentration of both the gaseous and particle-bound PCDD/Fs were similar, with a higher level at the end of the sintering bed. The PCDD/Fs concentration＇ s change tendency in the windbox was very consistent with the change of temperature of the flue gas in the windboxes. More than 60% PCDD/Fs of the total PCDD/Fs emission amount was emitted at the end of the sintering bed. Only this part of the waste gas accounted for 12% of the total waste gas volume.

关键词： Dioxins sintering formation mechanism

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Assessment of Regional Dietary Exposure to Dioxins in Seafood in Japan

Assessment of Regional Dietary Exposure to Dioxins in Seafoo...

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首届风险分析与危机反应国际学术研讨会

作者： Noriyuki Suzuki Takeo Sakurai National Institute for Environmental Studies 16-2 OnogawaTsukubaIbaraki305-8506Japan National Institute for Environmental Studies 16-2 OnogawaTsukubaIbaraki305-8506Japan

＜正＞This paper presents a method of estimating dietary exposure to Dioxins in specific region from monitoring data of Dioxins concentration in seafood by catching area and information of seafood circulation.Monte- Carlo method was applied to take into account both the uncertainty of measured value of Dioxins levels in fishes and variability between fish species.The seafood circulation was simulated with a linear programming （LP） model.Dietary exposure to Dioxins in seafood in seven regions in Japan was estimated and compared with the results of Total Dietary Studies （TDS）.No significant geographical variability of dietary exposure to Dioxins in seafood was observed for general population in Japan.

关键词： Seafood Dioxins Regional dietary exposure Monte-Carlo analysis

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Study of Dioxins in Water Samples from the Three Gorge Reservoir in China

Study of Dioxins in Water Samples from the Three Gorge Reser...

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2007中国科协年会

作者： Normitsu Saito Research Institute for Environmental Sciences and Public Health of Iwate Prefecture Morioka 020-0852Japan

The Three Gorge Reservoir(TGR)is the largest reservoir in China and its water quality is an important health concern,we have determined the concentrations of PCDD/PCDFs and PCBs in the water samples collected from three seasons:Augest 2004,January 2005 and Augest 2005.The results show that the levels of Dioxins in the TGR are much lower than other reported water sources.The main Dioxins are hepta- and octa-chlorinated dibenzo-p-Dioxins(CDDs)and chlorinated dibenzofurans(CDFs).Since the levels of Dioxins may,change after the last water-store stage,the present sntdy,provides important data to compare the water quality in the TGR in the future.

关键词： Three Gorge Reservoir PCDD/PCDFs PCBs Dioxins

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FORMATION MECHANISMS AND CONTROL STRATEGIES FOR Dioxins IN INCINERATION PROCESS OF MUNICIPAL SOLID WASTES

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化工学报 2000年第S1期51卷 211-218页

作者： Yang Xuemin, Li Ji, Lin Weigang, Yao Jianzhong, Wang Xiaoquan and Xie Yusheng (Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing 100080)

Dioxins, which are of the most toxic materials on the earth, are principal emitted from waste incineration process. The molecular structures, toxicity parameters, such as toxicity equivalency factor, tolerable daily intake and physic-chemical properties of Dioxins are briefly summarized. Three formation mechanisms of Dioxins in waste incineration process, namely as de novo synthesis, mechanisms involving small organic molecular as precursors and homogenous gas phase reaction mechanism are alto reviewed. The influencing factors for Dioxins formation during waste incineration process are also discussed. Three major methods for reducing Dioxins emission from waste incineration process are discussed based upon the formation mechanisms and influencing factors. A new waste incineration process with low Dioxins emission and low hydrogen chloride corrosion has been proposed based on multi- stage unit operation principal according to formation mechanisms of Dioxins and potential production location in waste incinerators.

关键词： Dioxins Formation mechanisms Dioxins emission Incineration process Municipal solid wastes PCDDD/Fs

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Residual Dioxins in Chinese schistosomiasis region and its eco-environmental risk

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Chinese Science Bulletin 1995年第20期40卷 1740-1747页

作者：蒋可李灵军陈宇东李树柏龚裕发 Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Schistosomiasis Prevention Office at Yichun District Yichun 336000 China

Dioxin is a general designation of polychlorinated dibenzo-p-Dioxins （PCDDs） and polychlorinated dibenzofurans （PCDFs）. They are two series of tricyclic, almost planar, aromatic compounds, which are composed of 75 PCDD and 135 PCDF congeners,respectively. Among them, the most toxic congener is 2, 3, 7, 8-TCDD, with the suggested permissible level for human 10×10-9mg/（kg·d）-1. The environmental scientists have expressed much concern over these compounds since the 1980s. Chlorine-containing

关键词： eco-environinent of Chinese schistosomiasis region Dioxins molluscacide Na-PCP.

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