Genetically engineered microorganisms for environmental remediation

Chemosphere, Journal Year: 2022, Volume and Issue: 310, P. 136751 - 136751

Published: Oct. 6, 2022

In the recent era, increasing persistence of hazardous contaminants is badly affecting globe in many ways. Due to high environmental contamination, almost every second species on earth facing worst issue their survival. Advances newer remediation approaches may help enhance bioremediation's quality, while conventional procedures have failed remove compounds from environment. Chemical and physical waste cleanup been used current circumstances; however, these methods are costly harmful Thus, there has a rise use bioremediation due an increase which led development genetically engineered microbes (GEMs). It safer more cost-effective microorganisms rather than alternative methods. GEMs created by introducing stronger protein into bacteria through biotechnology or genetic engineering desired trait. Biodegradation oil spills, halobenzoates naphthalenes, toluenes, trichloroethylene, octanes, xylenes etc. accomplished using such bacteria, fungus, algae. Biotechnologically induced powerful naturally occurring ones degrade faster because they can quickly adapt new pollutants encounter co-metabolize. Genetic worthy process that will benefit environment ultimately health our people.

Language: Английский

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Global review of source apportionment of volatile organic compounds based on highly time-resolved data from 2015 to 2021

Environment International, Journal Year: 2022, Volume and Issue: 165, P. 107330 - 107330

Published: May 31, 2022

Highly time-resolved data for volatile organic compounds (VOCs) can now be monitored. Source analyses of such high concentrations provides key information controlling VOC emissions. This work reviewed the literature on VOCs source published from 2015 to 2021, and assesses state-of-the-art existing issues with these studies. Gas chromatography system direct-inlet mass spectrometry are main monitoring tools. Quality control (QC) process is critical prior analysis. QC includes inspection replacement instrument consumables, calibration curve corrections, reviewing data. Approximately 54% papers lacked details quantitative evaluation effectiveness measures. Among works, number monitored species varied 5 119, fraction more than 90 increased yearly. US EPA PMF v5.0 was most commonly used (∼86%) analyses. However, conventional apportionment directly uses measured may problematic given impacts dispersion photochemical losses, uncertainty setting data, factor resolution, identification. Excluding high-reactivity or estimation corrected were often applied reduce influence reactions results. reports did not specify selection criteria specific error values in estimation. Model diagnostic indexes 99% analysis determine resolution. Due lack known local profiles, identification mainly achieved using marker characteristic ratios. multiple sources had high-collinearity same identify different sources. Vehicle emissions fuel evaporation primary contributors around world. Contribution coal combustion China substantially higher other countries.

Language: Английский

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The research hotspots and trends of volatile organic compound emissions from anthropogenic and natural sources: A systematic quantitative review

Environmental Research, Journal Year: 2022, Volume and Issue: 216, P. 114386 - 114386

Published: Sept. 24, 2022

Volatile organic compound (VOC) emissions have attracted wide attention due to their impacts on atmospheric quality and public health. However, most studies reviewed certain aspects of natural VOCs (NVOCs) or anthropogenic (AVOCs) rather than comprehensively quantifying the hotspots evolution trends AVOCs NVOCs. We combined bibliometric method with tree Markov chain identify research focus uncover in VOC emission sources. This study found that mainly focused characteristics, effects air health, under climate change. More concerned NVOCs, AVOC shifted a decreasing proportion transport an increasing share solvent utilization countries high publications (China USA). Research is imperative develop efficient economical abatement techniques specific sources BTEX species mitigate detrimental effects. NVOCs originating from human risen application medicine, while sensitive change grew slowly, including plants, biomass burning, microbes, soil oceans. long-term responses derived various warming warranted explore feedback global climate. It worthwhile establish inventory all kinds sources, accurate estimation, spatial temporal resolution capture synergy industrialization as well simulate quality. review both health point out directions for comprehensive control mitigation O3 pollution.

Language: Английский

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Source apportionment of VOCs based on photochemical loss in summer at a suburban site in Beijing

Atmospheric Environment, Journal Year: 2022, Volume and Issue: 293, P. 119459 - 119459

Published: Nov. 4, 2022

Language: Английский

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Mitigating oil and gas pollutants for a sustainable environment – Critical review and prospects

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 416, P. 137863 - 137863

Published: June 24, 2023

Language: Английский

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Effect of photochemical losses of ambient volatile organic compounds on their source apportionment

Environment International, Journal Year: 2023, Volume and Issue: 172, P. 107766 - 107766

Published: Jan. 18, 2023

Photochemical losses of ambient volatile organic compounds (VOCs) substantially affect source apportionment analysis. Hourly speciated VOC data measured from April to August 2020 in Tianjin, China were used analyze the photochemical species and assess impacts on by comparing positive matrix factorization (PMF) results based observed initial concentration (OC-PMF IC-PMF). The concentrations estimated using a age-based parameterization method. suggest that average loss total VOCs (TVOCs) during ozone pollution period was 2.4 times higher than non-ozone period. alkenes more significant other species. Temperature has an important effect losses, different have sensitivities temperature; high mainly occurred at temperatures between 25 °C 35 °C. reduced highly reactive OC-PMF factor profile. Compared with IC-PMF results, contributions biogenic emissions polymer production-related industrial sources underestimated 73 % 50 %, respectively, likely due oxidation isoprene propene, respectively. contribution diesel gasoline evaporation 39 which m,p-xylene. Additionally, liquefied petroleum gas, vehicle emissions, natural oil refinery 31 29 23 13 When O3 140 μg m-3 or 30 °C, most increased substantially. solar radiation produced for types.

Language: Английский

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Characteristics and sources of VOCs in a coastal city in eastern China and the implications in secondary organic aerosol and O3 formation

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 887, P. 164117 - 164117

Published: May 11, 2023

Language: Английский

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Surface reductive acid etching for the fabrication of abundant oxygen vacancies into CuCo2O4 for enhanced toluene oxidation

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 131805 - 131805

Published: Jan. 1, 2025

Language: Английский

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A comprehensive investigation on source apportionment and multi-directional regional transport of volatile organic compounds and ozone in urban Zhengzhou

Chemosphere, Journal Year: 2023, Volume and Issue: 334, P. 139001 - 139001

Published: May 21, 2023

Language: Английский

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Characterizing sources and ozone formations of summertime volatile organic compounds observed in a medium-sized city in Yangtze River Delta region

Chemosphere, Journal Year: 2023, Volume and Issue: 328, P. 138609 - 138609

Published: April 5, 2023

Language: Английский

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