Soil dioxins levels at agriculture sites and natural preserve areas of Taiwan

Jou, Jin Juh; Lin, Kae‐Long; Chung, Jen Chir; Liaw, Shu Liang

doi:10.1016/j.jhazmat.2006.12.050

Cited by 20 publications

(7 citation statements)

References 5 publications

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“…iIn general, the atmospheric deposition and soil erosion of the reservoir's catchment area were defined as the PCDD/F sources in the reservoir. In addition, the significantly higher distribution of PCDDs was measured in soil samples (Jou et al, 2007;Kiguchi et al, 2007). The results of our measurements indicated that increases in PCDD/F concentration were observed in the surface sediment of the TWR after the Typhoon Morakot event.…”

Section: Pcdd/f Circulation In Reservoir Water and Sediment Over Twrmentioning

confidence: 49%

Sources and Deposition Fluxes of PCDD/Fs in the Largest Reservoir System in Taiwan before and after Typhoon Morakot

Hsien

Luo

Kao

et al. 2015

Aerosol Air Qual. Res.

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The Tsengwen Reservoir (TWR) is positioned at 23°16′N, 120°34′E and is the largest reservoir in Taiwan. During 2009 to 2010, deposition flux of polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) in atmosphere, water bodies and sediments were measured in the TWR area for this study. The monthly ambient air PCDD/F deposition in the surrounding area of the TWR was found to range from 0.206 to 2.43 pg I-TEQ/m 2 /day. In addition, the PCDD/F levels (11 to 12 fg I-TEQ/L) in the shell water (water depth: 0.5 m) were found to be uniform and well mixed within the upstream, central and lower reaches of the TWR. The PCDD/F input flux into the reservoir was investigated in two sediment cores sampled at the TWR. The year dating within the sediment cores at different depths was projected from the sedimentation rate (> 17 cm/y) and calculated by (January, 2010). During the severe typhoon periods, the PCDD/F input contributed by the enhanced catchment landslides dramatically increased to 99%.

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Section: Pcdd/f Circulation In Reservoir Water and Sediment Over Twrmentioning

confidence: 49%

Sources and Deposition Fluxes of PCDD/Fs in the Largest Reservoir System in Taiwan before and after Typhoon Morakot

Hsien

Luo

Kao

et al. 2015

Aerosol Air Qual. Res.

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“…Although the fraction of PCDD/Fs in the final extract had been successfully separated from the other fractions, which were possibly contained in certain AhR-ligand compounds, after the CAPE column cleanup, the PCDD/Fs fraction still existed certain PCDD/Fs and residual AhR activated compounds to induce DR-CALUX activation except for 2,3,7,8-substituted PCDD/Fs. Considering the background levels of dioxins contamination in Taiwanese soils, Jou and his research team investigated background levels of soil dioxin-TEQs in the agriculture and natural preserve areas of Taiwan between 2001 and 2002 [43]. Mean levels of soil dioxin-TEQs were 3.37 and 2.20 pg I-TEQ/g d.w. in the agriculture farms (n = 96) and natural preserve areas (n = 11), respectively [43].…”

Section: Discussionmentioning

confidence: 99%

“…Considering the background levels of dioxins contamination in Taiwanese soils, Jou and his research team investigated background levels of soil dioxin-TEQs in the agriculture and natural preserve areas of Taiwan between 2001 and 2002 [43]. Mean levels of soil dioxin-TEQs were 3.37 and 2.20 pg I-TEQ/g d.w. in the agriculture farms (n = 96) and natural preserve areas (n = 11), respectively [43]. If we used the ratio of BEQs/I-TEQs as 3.83 to estimate soil I-TEQ levels in the present study, soil dioxin-TEQ levels were presented as 2.82 pg I-TEQ/g d.w. in Pitou (10.8 pg-BEQ/g d.w.), 2.20 pg I-TEQ/g d.w. in Sincheng (8.43 pg-BEQ/g d.w.), 2.07 pg I-TEQ/g d.w. in Dashu (7.91 pg-BEQ/g d.w.), and 1.92 pg I-TEQ/g d.w. in Hualin (7.37 pg-BEQ/g d.w.) with the similarity of background levels of soil dioxin-TEQs reported in the Jou’s study [43].…”

Section: Discussionmentioning

confidence: 99%

“…To date, no large-scale collections of dioxin-contaminated soil data or national soil dioxin surveillance projects have been carried anywhere in Taiwan, and only a limited number of surveillances or local investigations have been reported [13,25,26,41,42,43]. Many factors need to be considered in large-scale or longitudinal investigations of dioxin-contaminated soil, including the sampling and analytical costs, time needed for the analysis, and the capacity of the instruments used.…”

Section: Introductionmentioning

confidence: 99%

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Combination of a Fast Cleanup Procedure and a DR-CALUX® Bioassay for Dioxin Surveillance in Taiwanese Soils

Lin

Lee

et al. 2014

IJERPH

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Our goal was to determine dioxin levels in 800 soil samples collected from Taiwan. An in vitro DR-CALUX® assay was carried out with the help of an automated Soxhlet system and fast cleanup column. The mean dioxin level of 800 soil samples was 36.0 pg-bioanalytical equivalents (BEQs)/g dry weight (d.w.). Soil dioxin-BEQs were higher in northern Taiwan (61.8 pg-BEQ/g d.w.) than in central, southern, and eastern Taiwan (22.2, 24.9, and 7.80 pg-BEQ/g d.w., respectively). Analysis of multiple linear regression models identified four major predictors of dioxin-BEQs including soil sampling location (β = 0.097, p < 0.001), land use (β = 0.065, p < 0.001), soil brightness (β = 0.170, p < 0.001), and soil moisture (β = 0.051, p = 0.020), with adjusted R2 = 0.947 (p < 0.001) (n = 662). An univariate logistic regression analysis with the cut-off point of 33.4 pg-BEQ/g d.w. showed significant odds ratios (ORs) for soil sampling location (OR = 2.43, p < 0.001), land use (OR = 1.47, p < 0.001), and soil brightness (OR = 2.83, p = 0.009). In conclusion, four variables, including soil sampling location, land use, soil brightness, and soil moisture, may be related to soil-dioxin contamination. Soil samples collected in northern Taiwan, and especially in Bade City, soils near industrial areas, and soils with darker color may contain higher dioxin-BEQ levels.

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“…Zheng et al (2008) did a review of PCDD/Fs source and level in China, and found 0.09 to 2.4 pg I-TEQ g -1 in mountain and 0.14 to 3.7 pg I-TEQ g -1 in farmland. According to the survey (Jou et al, 2007), it is observed that PCDD/Fs range from 0.10 to 8.48 pg I-TEQ g -1 with an average of 2.20 pg I-TEQ g -1 in soil collected from a nature preserve area in Taiwan. Dioxin level in a urban surface soil in Norway is in the range of 0.16 to 14 pg I-TEQ g -1 (Andersson & Ottesen, 2008), and PCDD/Fs baseline in rural soil in Spain is 0.17 -8.14 pg I-TEQ g -1 .…”

Section: Baseline Of Pcdd/fs Concentration In Soilsmentioning

confidence: 99%

Long-Term Monitoring of Dioxin and Furan Level in Soil Around Medical Waste Incinerator

Li¹,

Yan²,

Chen³

et al. 2011

Soil Contamination

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Soil dioxins levels at agriculture sites and natural preserve areas of Taiwan

Cited by 20 publications

References 5 publications

Sources and Deposition Fluxes of PCDD/Fs in the Largest Reservoir System in Taiwan before and after Typhoon Morakot

Sources and Deposition Fluxes of PCDD/Fs in the Largest Reservoir System in Taiwan before and after Typhoon Morakot

Combination of a Fast Cleanup Procedure and a DR-CALUX® Bioassay for Dioxin Surveillance in Taiwanese Soils

Long-Term Monitoring of Dioxin and Furan Level in Soil Around Medical Waste Incinerator

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