Formation and Fate of Point-Source Nonextractable DDT-Related Compounds on Their Environmental Aquatic-Terrestrial Pathway

Zhu, Xiaojing; Dsikowitzky, Larissa; Kucher, Sebastian; Ricking, Mathias; Schwarzbauer, Jan

doi:10.1021/acs.est.8b06018

Cited by 25 publications

(13 citation statements)

References 56 publications

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“…A study evaluated the fate of DDXs (dicholorodiphenyltrichloroethane (DDT) and its metabolites) in solid matrices—sediments, soils, and groundwater sludge (Zhu, Dsikowitzky, Kucher, Ricking, & Schwarzbauer, 2019). The research results found that DDT and its first degradation products were mostly in freely extractable fraction, and other degradation products that formed due to chemical degradation were covalently bonded with the organic matrix.…”

Section: Pesticides and Veterinary Medicinementioning

confidence: 99%

Fate of environmental pollutants: A review

Aryal

Wood

Rijal

et al. 2020

Water Environment Research

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A review of the literature published in 2019 on topics associated with the fate of environmental pollutants is presented. Environmental pollutants covered include pharmaceuticals, antibiotic-resistant bacteria and genes, pesticides and veterinary medicines, personal care products and emerging pollutants, PFAS, microplastics, nanomaterials, heavy metals and radionuclides, nutrients, pathogens and indicator organisms, and oil and hydrocarbons. For each pollutant, the occurrence in the environment and/ or their fate in engineered as well as natural systems in matrices including water, soil, wastewater, stormwater, runoff, and/or manure is presented based on the published literature. The review includes current developments in understanding pollutants in natural and engineered systems, and relevant physico-chemical processes, as well as biological processes.

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Section: Pesticides and Veterinary Medicinementioning

confidence: 99%

Fate of environmental pollutants: A review

Aryal

Wood

Rijal

et al. 2020

Water Environment Research

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“…The presented and applied method was compared with newer approaches like pyrolysis-GC-MS and TMAHchemolysis GC-MS (Kronimus et al 2006;Zhu et al 2019). Considering potential artefacts, the combination serves as a tool for the assessment of a contamination.…”

Section: Easy Releasable Fractionmentioning

confidence: 99%

“…Applying the scheme proposed by Zhu et al (2019), the highest variation occurred in the middle layer of area C with a factor of more than 10,000 (see Table . The scheme differentiates the processes into dehalogenation, functional groups formation and loss of one carbon atom for the potential precursors down to DDNU.…”

Section: Calculation Of the Maximum Easily Releasable Amounts Of Dda And Precursor Metabolitesmentioning

confidence: 99%

“…According to Zhu et al (2019), the degradation of DDT in the NER was differentiated into three categories (including the initial DDT) in order to clarify not only the further cleavage of the aromatic ring structure but also the degree of degradation by dehalogenation, functional group formation and loss of a C-atom. Halogenated organic compounds are prone to a high environmental persistence.…”

Section: Introductionmentioning

confidence: 99%

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Sediment contamination of an urban canal—a case study approach for an integrated assessment of organic sediment contamination

2020

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Purpose The pesticide DDT and its metabolites represent a contamination risk for the aquatic environment, especially the polar metabolite DDA. The study provides a quantitative assessment of long-term pollution risks from sedimentary DDT residues with a special focus on DDA. It presents an overview of the contamination range of different DDX compounds in the sediments of a canal in Berlin (Germany), resulting from a former industrial point source that has implications for drinking water resources in the nearby area. The comprehensive analysis scheme provides information on free accessible and potentially metabolized precursors also in the non-extractable residues. This allows a quantitative assessment of the DDA pollution potential derived from the sedimentary DDT residues. Materials and methods The area was investigated for fine-grained sediment by means of a geo-electric mapping. Twelve sediment cores were taken in four areas (three in each section). A wider range of precursor metabolites has been included due to their transformation potential to the polar metabolite DDA. The sediments were analysed quantitatively for extractable and easily releasable fractions by application of a variety of degradation techniques as well as a dispersion extraction procedure on the sediment samples. These extracts were fractionated and subsequently analysed by GC-MS. Results and discussion Concentrations were obtained for extractable and bound metabolites. Different scenarios for the calculation of the amount of contaminated sediment are displayed as a tool for contamination assessment. The formation potential of DDA as the water-soluble metabolite is presented. Several precursor metabolites, e.g. DDD and DDMS, extractable from the sediment organic matter, revealed a high potential for a long-term formation of DDA, especially in the easily releasable fraction (via hydrolysis) with a mean concentration of up to 11,000 μg g−1 dry sediment. The resulting DDA contamination potential represents a significant pollution risk for the groundwater from a downstream waterworks area and by remobilisation into the whole ecosystem and adjacent rivers. Conclusions The application of the presented methods provides a tool for a quantitative assessment of the long-term release potential of DDA under different scenarios by a comprehensive analysis of contaminated sediments (and soils). This approach can be transferred to pollutants that are also characterized by a complex metabolism accompanied by bound residue formation.

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“…Sci. 2019, 9, 1722 2 of 11 p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE), one of the main metabolites of DDT, can exist for decades in soils and aquatic sediments and have adverse effects on humans and the environment [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Addition of Carbonaceous Material to Aquatic Sediments for Sorption of Lindane and p,p’-Dichlorodiphenyldichloroethylene

Guo

Chen

Wang³

et al. 2019

Applied Sciences

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Isomers of hexachlorocyclohexanes (HCHs) and metabolites of dichlorodiphenyltrichloroethanes (DDTs) are still frequently detected worldwide in considerable amounts, even decades after their prohibition. Carbonaceous materials (CMs) have been shown to significantly reduce risks of propagation to humans by binding the hydrophobic organochlorine pesticides (OCPs) present in aquatic sediments. In the present study, black carbons extracted from natural sediments, and artificially produced black carbons, including black carbons by burning rice straw at 450 and 850 °C, and a commercial activated carbon were compared to investigate the factors affecting the sorption of γ-HCH (lindane) and p,p’-dichlorodiphenyldichloroethylene (p,p’-DDE) on CMs. The results indicated that when the proportion of CMs to total organic carbon (ƒCM/ƒOC) was greater than 0.35, CMs played a leading role in the sorption of lindane and p,p’-DDE by the sediments. The sorption contribution rate of CMs could reach up to 64.7%. When the ratio of ƒCM/ƒOC was less than 0.10, CMs played a minor role in the sorption. In addition, the nonlinearity of the sorption isotherms was strengthened with the increasing the proportion of CMs to total organic carbon. Our findings show that ƒCM/ƒOC value is a principal parameter for assessing the sorption capacity of sediments added by CMs for OCPs.

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Formation and Fate of Point-Source Nonextractable DDT-Related Compounds on Their Environmental Aquatic-Terrestrial Pathway

Cited by 25 publications

References 56 publications

Fate of environmental pollutants: A review

Fate of environmental pollutants: A review

Sediment contamination of an urban canal—a case study approach for an integrated assessment of organic sediment contamination

Addition of Carbonaceous Material to Aquatic Sediments for Sorption of Lindane and p,p’-Dichlorodiphenyldichloroethylene

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