Enhanced dissipation of DEHP in soil and simultaneously reduced bioaccumulation of DEHP in vegetable using bioaugmentation with exogenous bacteria

Zhao, Hai-Ming; Hu, Ruiwen; Huang, He-Biao; Wen, Hongmei; Du, Hongwu; Li, Yanwen; Li, Hui; Cai, Quan-Ying; Chen, Mo; Liu, Jie‐Sheng; Wong, Ming Hung

doi:10.1007/s00374-017-1208-y

Cited by 44 publications

(19 citation statements)

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“…The study of an organism's metabolic pathways is crucial for analyzing the biodegradation potential of a microorganism. Intermediate metabolites are sometimes more toxic than the parent compound [52][53][54]. We confirmed that strain SG4 produced non-toxic intermediates while effectively degrading cypermethrin.…”

Section: Discussionsupporting

confidence: 57%

Enhanced Cypermethrin Degradation Kinetics and Metabolic Pathway in Bacillus thuringiensis Strain SG4

et al. 2020

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Cypermethrin is popularly used as an insecticide in households and agricultural fields, resulting in serious environmental contamination. Rapid and effective techniques that minimize or remove insecticidal residues from the environment are urgently required. However, the currently available cypermethrin-degrading bacterial strains are suboptimal. We aimed to characterize the kinetics and metabolic pathway of highly efficient cypermethrin-degrading Bacillus thuringiensis strain SG4. Strain SG4 effectively degraded cypermethrin under different conditions. The maximum degradation was observed at 32 °C, pH 7.0, and a shaking speed of 110 rpm, and about 80% of the initial dose of cypermethrin (50 mg·L−1) was degraded in minimal salt medium within 15 days. SG4 cells immobilized with sodium alginate provided a higher degradation rate (85.0%) and lower half-life (t1/2) of 5.3 days compared to the 52.9 days of the control. Bioaugmentation of cypermethrin-contaminated soil slurry with strain SG4 significantly enhanced its biodegradation (83.3%). Analysis of the degradation products led to identification of nine metabolites of cypermethrin, which revealed that cypermethrin could be degraded first by cleavage of its ester bond, followed by degradation of the benzene ring, and subsequent metabolism. A new degradation pathway for cypermethrin was proposed based on analysis of the metabolites. We investigated the active role of B. thuringiensis strain SG4 in cypermethrin degradation under various conditions that could be applied in large-scale pollutant treatment.

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Section: Discussionsupporting

confidence: 57%

Enhanced Cypermethrin Degradation Kinetics and Metabolic Pathway in Bacillus thuringiensis Strain SG4

et al. 2020

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“…After14 days of incubation, TPHs decreased to 42.3% of their initial concentration in soil treated with the microbial consortium and nutrients and the decrease was clearly greater than the 10.1% decrease observed in the bulk scale soil without treatment. These results suggest that a combination of bioaugmentation using exogeneous microbial consortium and biostimulation using nutrients (nitrogen and phosphorus) can effectively clean up polluted environments contaminated with organic compounds, as shown in previous reports ( Kim et al, 2005 ; Jimenez et al, 2006 ; Garcia-Blanco et al, 2007 ; Karamalidis et al, 2010 ; Zhao et al, 2017 ).…”

Section: Resultssupporting

confidence: 86%

“…Although a nutrient supply is very effective in promoting microbial activity in nutrient-depleted soil, it is not easy to supply nutrients with bioavailability efficiently to a contaminated soil, especially in in situ soil bioremediation. Thus, combined bioaugmentation processes with other approaches to stimulate microbial activity in soil such as plant exudates have been suggested as efficient bioaugmentation processes ( Zhao et al, 2017 ).…”

Section: Resultsmentioning

confidence: 99%

“…In particular, an accidental oil spill leads to the release of large quantities of petroleum into the environment, and subsequently perturbs environmental ecosystems tremendously ( Khamforoush et al, 2013 ; Macaulay and Rees, 2014 ). Bioremediation, which relies on microbiological processes, has proven to be a non-disruptive, cost-effective, and highly efficient approach to remove organic pollutants, particularly compared to other physico-chemical approaches ( Tyagi et al, 2011 ; Fathepure, 2014 ; Zhao et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

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Construction and Evaluation of a Korean Native Microbial Consortium for the Bioremediation of Diesel Fuel-Contaminated Soil in Korea

et al. 2018

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A native microbial consortium for the bioremediation of soil contaminated with diesel fuel in Korea was constructed and its biodegradation ability was assessed. Microbial strains isolated from Korean terrestrial environments, with the potential to biodegrade aliphatic hydrocarbons, PAHs, and resins, were investigated and among them, eventually seven microbial strains, Acinetobacter oleivorans DR1, Corynebacterium sp. KSS-2, Pseudomonas sp. AS1, Pseudomonas sp. Neph5, Rhodococcus sp. KOS-1, Micrococcus sp. KSS-8, and Yarrowia sp. KSS-1 were selected for the construction of a microbial consortium based on their biodegradation ability, hydrophobicity, and emulsifying activity. Laboratory- and bulk-scale biodegradation tests showed that in diesel fuel-contaminated soil supplemented with nutrients (nitrogen and phosphorus), the microbial consortium clearly improved the biodegradation of total petroleum hydrocarbons, and all microbial strains constituting the microbial consortium, except for Yarrowia survived and grew well, which suggests that the microbial consortium can be used for the bioremediation of diesel fuel-contaminated soil in Korea.

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“…Although a correlation between atrazine and land used for crops is a logical result, it is not as obvious why DEHP, TDCPP, TBEP, and TCPP are correlated to land used for crops. Possible sources of these contaminants could be treated wastewater or sludge applications as fertilizer (Pedersen et al 2005 ; Lamastra et al 2018 ) or, in the case of DEHP, plastic films used in agricultural applications (Zhao et al 2017 ). Also, DEHP is susceptible to atmospheric transport in both gaseous and particulate‐bound forms (Xie et al 2007 ; Zhen et al 2019 ).…”

Section: Resultsmentioning

confidence: 99%

Identifying Chemicals and Mixtures of Potential Biological Concern Detected in Passive Samplers from Great Lakes Tributaries Using High‐Throughput Data and Biological Pathways

Alvarez

Corsi

DeCicco

et al. 2021

Enviro Toxic and Chemistry

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Water-borne contaminants were monitored in 69 tributaries of the Laurentian Great Lakes in 2010 and 2014 using semipermeable membrane devices (SPMDs), and This article is protected by copyright. All rights reserved. Accepted Articlepolar organic chemical integrative samplers (POCIS). A risk-based screening approach was used to prioritize chemicals and chemical mixtures, identify sites at greatest risk for biological impacts, and identify potential hazards to monitor at those sites. Analyses included 185 chemicals (143 detected) including polycyclic aromatic hydrocarbons (PAHs), legacy and current-use pesticides, fire retardants, pharmaceuticals, fragrances, and others. Hazard quotients were calculated by dividing detected concentrations by biological effect concentrations reported in the ECOTOX Knowledgebase (Toxicity quotients, TQs) or ToxCast database (Exposure Activity Ratios, EARs). Mixture effects were estimated by summation of EAR values for chemicals that influence ToxCast assays with common gene targets. Nineteen chemicals, including atrazine, DEET, di(2ethylhexyl)phthalate, dl-menthol, galaxolide, p-tert-octylphenol, three organochlorine pesticides, three PAHs, four pharmaceuticals, and three phosphate flame retardants, had TQs greater than 0.1 or EARs for individual chemicals (EAR chem ) greater than 10 -3 at 10% or more of the sites monitored. An additional four chemicals (tributyl phosphate, triethyl citrate, benz(a)anthracene, and benzo(b)fluoranthene) were present in mixtures with EAR (EAR mixture ) greater than 10 -3 . To evaluate potential apical effects and biological endpoints to monitor in exposed wildlife, in vitro bioactivity data were compared to adverse outcome pathway (AOP) and gene ontology information. Endpoints and effects associated with endocrine disruption, alterations in xenobiotic metabolism, and potentially neuronal development would be relevant to monitor at the priority sites.The EAR threshold exceedance for many chemical classes was correlated with urban land cover and wastewater effluent influence, while herbicides and fire retardants were also correlated to agricultural land cover.

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Enhanced dissipation of DEHP in soil and simultaneously reduced bioaccumulation of DEHP in vegetable using bioaugmentation with exogenous bacteria

Cited by 44 publications

References 45 publications

Enhanced Cypermethrin Degradation Kinetics and Metabolic Pathway in Bacillus thuringiensis Strain SG4

Enhanced Cypermethrin Degradation Kinetics and Metabolic Pathway in Bacillus thuringiensis Strain SG4

Construction and Evaluation of a Korean Native Microbial Consortium for the Bioremediation of Diesel Fuel-Contaminated Soil in Korea

Identifying Chemicals and Mixtures of Potential Biological Concern Detected in Passive Samplers from Great Lakes Tributaries Using High‐Throughput Data and Biological Pathways

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