Examination of factors dominating the sediment-water diffusion flux of DDT-related compounds measured by passive sampling in an urbanized estuarine bay

Feng, Yan; Wu, Chen-Chou; Bao, Lian-Jun; Shi, Lei; Lin, Song; Zeng, Eddy Y.

doi:10.1016/j.envpol.2016.08.046

Cited by 10 publications

(5 citation statements)

References 34 publications

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“…The sediment–water passive sampler is composed of the upper and lower sections for measuring the dissolved concentrations of target compounds in overlying water and sediment porewater, respectively. , In brief, there are 17 square sampling cells (each size: 100 × 100 mm) at different distances from the sediment–water interface for the upper section and four regular sampling cells (each size: 220 × 120 mm) for the lower section. A stainless-steel grid was added into each regular sampling cell for positioning seven pieces of PDMS membranes at different sediment depths.…”

Section: Methodsmentioning

confidence: 99%

“…Besides porewater HOC concentration, AC and OC-like materials could also affect the diffusion fluxes of HOCs. ,, Our previous study demonstrated that the sediment–water diffusion fluxes of p , p ′-DDE, p , p ′-DDD, and p , p ′-DDD from DDT-contaminated sediment to overlying water were reduced by 10–13 and 11–18% with increased contents of BC and kerogen by 6.7 and 11%, respectively . However, correlations between the sediment–water diffusion fluxes of HOCs and organic matter contents could not be established due to a small range of the organic matter contents and large uncertainties in diffusion fluxes …”

Section: Introductionmentioning

confidence: 96%

“…14,21,23 Our previous study demonstrated that the sediment−water diffusion fluxes of p,p′-DDE, p,p′-DDD, and p,p′-DDD from DDT-contaminated sediment to overlying water were reduced by 10−13 and 11−18% with increased contents of BC and kerogen by 6.7 and 11%, respectively. 24 However, correlations between the sediment−water diffusion fluxes of HOCs and organic matter contents could not be established due to a small range of the organic matter contents and large uncertainties in diffusion fluxes. 24 To address the abovementioned issue, a microcosm system including water and sediment with different AC doses was constructed, and the sediment was spiked with typical HOCs, such as organophosphorus flame retardants (OPFRs) and polybrominated diphenyl ethers (PBDEs).…”

Section: ■ Introductionmentioning

confidence: 99%

“…24 However, correlations between the sediment−water diffusion fluxes of HOCs and organic matter contents could not be established due to a small range of the organic matter contents and large uncertainties in diffusion fluxes. 24 To address the abovementioned issue, a microcosm system including water and sediment with different AC doses was constructed, and the sediment was spiked with typical HOCs, such as organophosphorus flame retardants (OPFRs) and polybrominated diphenyl ethers (PBDEs). The diffusion fluxes of the target compounds across the sediment−water interface were determined by an integrated passive sampling device with polydimethylsiloxane (PDMS) film as the sorbent phase 25 and a classical two-point quantitation method.…”

Section: ■ Introductionmentioning

confidence: 99%

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Model of Activated Carbon Dose and Sediment–Water Diffusion Fluxes of Hydrophobic Organic Chemicals: Implications for Sediment Remediation

Qiu

et al. 2023

ACS EST Water

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Activated carbon (AC) amendment is an effective strategy for remediating contaminated sediment by hydrophobic organic chemicals. Reductions of porewater chemical concentrations have been used for estimating recommended AC dose for effective sediment remediation, but the AC dose may have large uncertainties resulting from site-specific parameters. The present study examined sediment−water diffusion flux as an alternative assessment parameter by correlating diffusion fluxes of organophosphorus flame retardants (OPFRs) and polybrominated diphenyl ethers (PBDEs) with AC doses. AC at doses of 8−36% substantially reduced sediment porewater concentrations and diffusion fluxes of the target chemicals. Diffusion fluxes of OPFRs and PBDEs normalized by their corresponding sediment concentrations significantly correlated with total organic carbon contents (r 2 = 0.57−0.93). A model was established to estimate the required AC dose for effective sediment amendment from the diffusion flux and sediment concentration of a target chemical. Using contaminated sediment in a typical e-waste recycling zone, the AC doses (0.1 ± 1.3−12.8 ± 0.3%) required to reduce 90% of diffusion fluxes for tri-n-butyl phosphate and BDE-17 were within the recommended range (1.9 ± 3.6−5.6 ± 8.3%) in lowering porewater concentrations by the same magnitude. This finding suggested the feasibility of the new model in supporting sediment remediation.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Model of Activated Carbon Dose and Sediment–Water Diffusion Fluxes of Hydrophobic Organic Chemicals: Implications for Sediment Remediation

Qiu

et al. 2023

ACS EST Water

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“…Alternatives exist on how to degrade such compounds (e.g., photochemical reactions 6,7 , adapted bacteria), but they are extremely slow 8,9 . Therefore, POPs still contaminate soil 10,11 , air 12 , water 13,14 , and food 15 , but also human fat 16 , blood serum 17 , and breast milk 16,18,19 even decades after most of the countries banned their use. Many POPs interfere with hormone signaling 20–22 , and this is why they are called endocrine disruptors.…”

Section: Introductionmentioning

confidence: 99%

Upregulation of vitamin D-binding protein is associated with changes in insulin production in pancreatic beta-cells exposed to p,p′-DDT and p,p′-DDE

Pavlíková

Daniel

Šrámek

et al. 2019

Sci Rep

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Persistent organochlorine pollutants (POPs) gradually accumulate in the human organism due to their presence in the environment. Some studies have described a correlation between the level of POPs in the human body and the incidence of diabetes, but we know little about the direct effect of POPs on pancreatic beta-cells. We exposed pancreatic beta-cells INS1E to non-lethal concentrations of p,p′-DDT (1,1′-(2,2,2-Trichloroethane-1,1-diyl)bis(4-chlorobenzene)) and p,p′-DDE (1,1′-(2,2-dichloroethene-1,1-diyl)bis(4-chlorobenzene)) for 1 month, and assessed changes in protein expression and the intracellular insulin level. 2-D electrophoresis revealed 6 proteins with changed expression in cells exposed to p,p′-DDT or p,p′-DDE. One of the detected proteins – vitamin D-binding protein (VDBP) – was upregulated in both cells exposed to p,p′-DDT, and cells exposed to p,p′-DDE. Both exposures to pollutants reduced the intracellular level of insulin mRNA, proinsulin, and insulin monomer; p,p′-DDT also slightly reduced the level of hexameric insulin. Overexpression of VDBP caused by the stable transfection of beta-cells with the gene for VDBP decreased both the proinsulin and hexameric insulin level in beta-cells similarly to the reduction detected in cells exposed to p,p′-DDT. Our data suggest that in the cells exposed to p,p′-DDT and p,p′-DDE, the increased VDBP protein level decreased the proinsulin expression in an unknown mechanism.

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Spatial Distribution of Metals and Associated Risks in Surface Sediments Along a Typical Urban River Gradient in the Beijing Region

Zhang

Liu

Coxixo

et al. 2017

Arch Environ Contam Toxicol

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Surface sediments from Beiyun River located in the rapidly urbanized Beijing metropolis were collected and analyzed for heavy metals (As, Cd, Cr, Cu, Mn, Ni, Pb, and Zn) to investigate their spatial distribution pattern, ecotoxicology and source identification. Results indicated the average heavy metal concentrations of Cd, Cr, Cu, Pb, and Zn were approximately 4, 2, 3, 2, and 4 times higher than their background values. Spatially, we found the concentrations of heavy metals made significant change in four sections along urbanized river gradients. The contents in midstream of urban region and farmland region (section 2 and section 3) were greater than those in upstream (section 1) and downstream (section 4). However, one-way analysis of variance for spatial analysis suggested there were no significant differences between mainstream and tributaries. The geo-accumulation index (I ) used to assess the sediment quality exhibited there was a decreasing order for the average I of measured heavy metals: Zn (0.82) > Cd (0.53) > Cu (0.50) > Cr (- 0.08) > Pb (- 0.45) > Ni (- 0.96) > Mn (- 0.97) > As (- 1.01), whereas they had different "high-low" orders at different sampling transects. Ecological risk index values showed that section 2 and section 3 revealed a high and moderate ecological risk, respectively. Furthermore, principal component analysis indicated the first principle component explained 64.73% of total variance with the main pollutants of As, Cr, Ni, Zn, and Cu which were probably controlled by the mixed sources covering natural factors and anthropogenic input.

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Examination of factors dominating the sediment-water diffusion flux of DDT-related compounds measured by passive sampling in an urbanized estuarine bay

Cited by 10 publications

References 34 publications

Model of Activated Carbon Dose and Sediment–Water Diffusion Fluxes of Hydrophobic Organic Chemicals: Implications for Sediment Remediation

Model of Activated Carbon Dose and Sediment–Water Diffusion Fluxes of Hydrophobic Organic Chemicals: Implications for Sediment Remediation

Upregulation of vitamin D-binding protein is associated with changes in insulin production in pancreatic beta-cells exposed to p,p′-DDT and p,p′-DDE

Spatial Distribution of Metals and Associated Risks in Surface Sediments Along a Typical Urban River Gradient in the Beijing Region

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