The interactive biotic and abiotic processes of DDT transformation under dissimilatory iron-reducing conditions

Jin, Xin; Wang, Fang; Gu, Chenggang; Yang, Xinglun; Kengara, Fredrick Orori; Bian, Yongrong; Song, Yang; Jiang, Xin

doi:10.1016/j.chemosphere.2015.05.020

Cited by 22 publications

(7 citation statements)

References 33 publications

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“…56 Besides, the secondary minerals of iron oxyhydroxide could play an important role in the biodechlorination of organochlorines. 29,57 According to previous study, nZVI could be gradually transformed to vivianite during the biodegradation of PCP, and the formed minerals could further promote the microbial degradation of PCP by acting as electron donors. 29 The mechanisms on electron transfer are detailed below.…”

Section: Resultsmentioning

confidence: 95%

“…It has been pointed out that some bacteria could promote the synthesis of vivianite by regulating the biosynthesis of extracellular polymeric substances (EPS) through tricarboxylic acid cycle, amino acid metabolism, and purine metabolism; SOM could enhance the biosynthesis of vivianite by up-regulating the expression of electron transfer activity-, flagella-, and metal ion binding-related genes . Besides, the secondary minerals of iron oxyhydroxide could play an important role in the biodechlorination of organochlorines. , According to previous study, nZVI could be gradually transformed to vivianite during the biodegradation of PCP, and the formed minerals could further promote the microbial degradation of PCP by acting as electron donors . The mechanisms on electron transfer are detailed below.…”

Section: Resultsmentioning

confidence: 99%

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Synergistic Effect of Soil Organic Matter and Nanoscale Zero-Valent Iron on Biodechlorination

Liu

Wang

et al. 2022

Environ. Sci. Technol.

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Nanoscale zero-valent iron (nZVI) provides a promising solution for organochlorine (OC)-contaminated soil remediation. However, the interactions among nZVI, soil organic matter (SOM), and indigenous dechlorinating bacteria are intricate, which may result in unascertained effects on the reductive degradation of OCs and merits specific investigation. Herein, we isolated an indigenous dehalogenation bacterium (Burkholderia ambifaria strain L3) from a paddy soil and further investigated the biodechlorination of pentachlorophenol (PCP) with individual and a combination of SOM and nZVI. In comparison with individual-strain L3 treatment, the cotreatment with nZVI or SOM increased the removal efficiency of PCP from 34.4 to 44.3–54.2% after 15 day cultivation. More importantly, a synergistic effect of SOM and nZVI was observed on the PCP removal by strain L3, and the PCP removal efficiency reached up to 75.3–84.5%. Other than the biodegradation through ortho- and meta-substitution under the individual application of SOM or nZVI, PCP was further biodegraded to 2,4,6-trichlorophenol (TCP) through para-substitution by the isolated bacteria with the cotreatment of SOM and nZVI. The main roles of the nZVI–SOM cotreatment in the biodegradation included the SOM-facilitated microbial proliferation, the nZVI-promoted microbial transformation of SOM, and the induced higher electron transport capacity of redox Fe-PCP biocycling. These findings provide a novel insight into the action of nZVI in environmental remediations.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Synergistic Effect of Soil Organic Matter and Nanoscale Zero-Valent Iron on Biodechlorination

Liu

Wang

et al. 2022

Environ. Sci. Technol.

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“…This can be hastened by the addition of α-FeOOH, where biogenic Fe [II] acted as a mediator for the transformation of DDT [97]. Related Shewanella putrefaciens reductively dechlorinates DDT by a similar mechanism [98] Shewanella genus includes known exo-electrogenic species, including S. putrefaciens, that can be cultivated in BESs [99]. It is plausible DDT breakdown could be accelerated by cultivating Shewanella sp.…”

Section: Bacterial Bioremediationmentioning

confidence: 99%

Bioelectrochemical and Conventional Bioremediation of Environmental Pollutants

Pisciotta¹,

Dolceamore²

2016

J Microb Biochem Technol

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One of the first widely used, synthetically-produced pesticides was the organochloride class agent DDT. From the Second World War until its ban in the early 1970's, DDT was deployed on a vast scale for control of insects and insect-borne diseases and as a highly effective agricultural pesticide [11]. For example, over a half million pounds of DDT was applied to salt marshes in Cape May County, New Jersey

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“…DDT is associated with serious risks to the environment and human health, including carcinogenesis, endocrine disruption, and estrogenic action. , However, DDT and its metabolites (DDXs), particularly dichlorodiphenyldichloroethane (DDD) and dichlorodiphenyldichloroethylene (DDE), which could be the congeneric impurities of technical DDT at very low amounts, − are still frequently worldwide detectable in considerable amounts even decades after the DDT prohibition . Those metabolites are also reported to be environmentally and biologically harmful. − The ongoing usage of the DDT related pesticide dicofol, as well as specialty applications of DDT in antifouling paints and limited disease vector control efforts, result in substantial emission of DDT/DDXs that are cause for continued environmental concern. , Consequently, knowledge on nonextractable DDXs is still necessary for both risk assessment and remediation actions.…”

Section: Introductionmentioning

confidence: 99%

“…13−15 The ongoing usage of the DDT related pesticide dicofol, as well as specialty applications of DDT in antifouling paints and limited disease vector control efforts, result in substantial emission of DDT/DDXs that are cause for continued environmental concern. 16,17 Consequently, knowledge on nonextractable DDXs is still necessary for both risk assessment and remediation actions.…”

Section: Introductionmentioning

confidence: 99%

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

Zhu

Dsikowitzky

Kucher

et al. 2019

Environ. Sci. Technol.

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Nonextractable residues (NER) are pollutants incorporated into the matrix of natural solid matter via different binding mechanisms. They can become bioavailable or remobilize during physical−chemical changes of the surrounding conditions and should thus not be neglected in environmental risk assessment. Sediments, soils, and groundwater sludge contaminated with DDXs (DDT, dichlorodiphenyltrichloroethane; and its metabolites) were treated with solvent extraction, sequential chemical degradation, and thermochemolysis to study the fate of NER-DDX along different environmental aquatic-terrestrial pathways. The results showed that DDT and its first degradation products, DDD (dichlorodiphenyldichloroethane) and DDE (dichlorodiphenyldichloroethylene), were dominant in the free extractable fraction, whereas DDM (dichlorodiphenylmethane), DBP (dichlorobenzophenone), and DDA (dichlorodiphenylacetic acid) were observed primarily after chemical degradation. The detection of DDA, DDMUBr (bis(p-chlorophenyl)bromoethylene), DDPU (bis(p-chlorophenyl)-propene) and DDPS (bis(p-chlorophenyl)-propane) after chemical treatments evidenced the covalent bindings between these DDXs and the organic matrix. The identified NER-DDXs were categorized into three groups according to the three-step degradation process of DDT. Their distribution along the different pathways demonstrated significant specificity. Based on the obtained results, a conceptual model of the fate of NER-DDXs on their different environmental aquatic-terrestrial pathways is proposed. This model provides basic knowledge for risk assessment and remediation of both extractable and nonextractable DDT-related contaminations.

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The interactive biotic and abiotic processes of DDT transformation under dissimilatory iron-reducing conditions

Cited by 22 publications

References 33 publications

Synergistic Effect of Soil Organic Matter and Nanoscale Zero-Valent Iron on Biodechlorination

Synergistic Effect of Soil Organic Matter and Nanoscale Zero-Valent Iron on Biodechlorination

Bioelectrochemical and Conventional Bioremediation of Environmental Pollutants

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

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