Figure - uploaded by Nguyen Quang Trung
Content may be subject to copyright.
Geographical locations, coordinates, and conditions for the sampling sites at Ba Vi, Quang Tri, and Trang Bang, Vietnam
Source publication
In this study, we investigated the levels of polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/PCDF) in soils from Jatropha plantations in three areas that were devastated during the Vietnam War, Ba Vi, Quang Tri, and Trang Bang, and in the Jatropha seeds from Trang Bang. The total toxic equivalent quantity (TEQ) in the soil was 2.1, 4.7, and...
Contexts in source publication
Context 1
... samples were collected from Ba Vi and Quang Tri Jatropha cultivation areas, and both soil and seed samples were simultaneously collected at Trang Bang Seed Production Center in Vietnam; the sampling locations including coordinates and sampling conditions are summarized in Table 1 and the sampling sites in each plantation area are shown in Fig. 1. According to the manual of soil sampling provided by the Ministry of the Environment [MOE], Government of Japan (MOE, Government of Japan, 2009), a soil sample was collected from each of the 10 identified blocks as follows; five portions of soils ( > 100 g each) were collected, one of which was at the center of the block and the other four at the crossing points at right angles with a 2 m circle radius. ...Context 2
... samples were collected from Ba Vi and Quang Tri Jatropha cultivation areas, and both soil and seed samples were simultaneously collected at Trang Bang Seed Production Center in Vietnam; the sampling locations including coordinates and sampling conditions are summarized in Table 1 and the sampling sites in each plantation area are shown in Fig. 1. According to the manual of soil sampling provided by the Ministry of the Environment [MOE], Government of Japan (MOE, Government of Japan, 2009), a soil sample was collected from each of the 10 identified blocks as follows; five portions of soils ( > 100 g each) were collected, one of which was at the center of the block and the other four at the crossing points at right angles with a 2 m circle radius. ...Similar publications
On Site Thermal Conductive Heating has been performed at the Bien Hoa Airforce Base 'Vietnam) where soil contaminated with agent orange has been treated.
The report provide the full details about the treatment, from initiial concentrations, set-up and design, with all results (clean soil emissions, waste, etc.)
IntroductionDuring the Vietnam War, several unknown chemicals, such as Agent Orange, were used in Vietnam by the military. Therefore, there have been continuous health concerns among the Vietnamese population and veterans exposed to these hazardous chemicals. This study aimed to investigate the risk of all cancers and also organ-specific cancers am...
Background: Herbicide and pesticide exposure (e.g., agent orange [AO]) is associated with an increased risk of multiple myeloma (MM) due to the contaminant, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). Monoclonal gammopathy of undetermined significance (MGUS) is the precursor state to MM; however, not all patients with MGUS progress to MM. It is unc...
Free-range chicken eggs and topsoil samples from private households in Southeast and South Central Coast of Vietnam were investigated to identify potential PCDD/F sources using Positive Matrix Factorization (PMF) approach. The PMF-extracted egg congener patterns were transformed to soil patterns using bioaccumulation factors and then compared to ex...
This study reports that children exposed to 2,3,7,8-tetra-chlorodibenzo-p-dioxin (TCDD), the major toxin in Agent Orange, from the breast milk of mothers residing near the former Da Nang US air base in Vietnam may have specific alterations in higher brain functions, resulting in social and communication deficits, including autism spectrum disorder...
Citations
... PCDD molecules include two oxygen atoms, whereas PCDF molecules have only one. Compounds of PCDD/F with at least four chlorine atoms at positions 2, 3, 7, 8 (2,3,7,8-substituted-PCDD/Fs) are toxic and have a high propensity for bioaccumulation in food chains, even spreading to humans [10][11][12]. PCDD/F compounds are white and exhibit stability in both alkaline and acidic environments. They are slightly soluble in water and resist evaporation but are readily soluble in fatty acids. ...
This first study investigated the presence of dioxins and furans in river sediments around a craft village in Vietnam, focusing on Secondary Steel Recycling. Sediment samples were collected from various locations along the riverbed near the Da Hoi Secondary Steel Recycling village in Bac Ninh province. The analysis was conducted using a HRGC/HRMS-DFS device, detecting a total of 17 dioxin/furan isomers in all samples, with an average total concentration of 288.86 ng/kg d.w. The concentrations of dioxin/furan congeners showed minimal variation among sediment samples, ranging from 253.9 to 344.2 ng/kg d.w. The predominant compounds in the dioxin group were OCDD, while in the furan group, they were 1,2,3,4,6,7,8-HpCDF and OCDF. The chlorine content in the molecule appeared to be closely related to the concentration of dioxins and their percentage distribution. However, the levels of furan isomers did not vary significantly. The distribution of these compounds was not dependent on the flow direction, as they were mainly found in solid waste and are not water-soluble. Although the hepta and octa congeners had high concentrations, when converted to TEQ values, the tetra and penta groups (for dioxins) and the penta and hexa groups (for furans) contributed more to toxicity. Furthermore, the source of dioxins in sediments at Da Hoi does not only originate from steel recycling production activities but also from other combustion sites. The average total toxicity was 10.92 ng TEQ/kg d.w, ranging from 4.99 to 17.88 ng TEQ/kg d.w, which did not exceed the threshold specified in QCVN 43:2017/BTNMT, the National Technical Regulation on Sediment Quality. Nonetheless, these levels are still concerning. The presence of these toxic substances not only impacts aquatic organisms in the sampled water environment but also poses potential health risks to residents living nearby.
