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Open AccessJournal ArticleDOI

Degradation of chlortetracycline using immobilized laccase on Polyacrylonitrile-biochar composite nanofibrous membrane.

TLDR
In this study, laccase was immobilized onto homemade Polyacrylonitrile-biochar composite nanofibrous membrane and the obtained biocatalyst was employed for removal of chlortetracycline, a widely used antibiotic, from aqueous media in continuous mode and the results showed that the immobilized lAccase has improved storage, temperature and pH stability compared to free l Accase.
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This article is published in Science of The Total Environment.The article was published on 2017-12-15 and is currently open access. It has received 111 citations till now. The article focuses on the topics: Laccase.

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Citations
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Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

TL;DR: In this article, a review of the latest development in reported biochar-based materials as superior adsorbents or catalysts for removing harmful organic contaminants from wastewater is presented, which is in favor of the organic contaminant removal.
Journal ArticleDOI

Hazardous contaminants in the environment and their laccase-assisted degradation - A review.

TL;DR: This review summarizes the most significant recent advances in the use of laccases and their future perspectives in environmental biotechnology.
Journal ArticleDOI

Removal of pharmaceutical compounds in water and wastewater using fungal oxidoreductase enzymes.

TL;DR: Higher hydrophobicity and having electron-donating groups, such as amine and hydroxyl in molecular structure leads to more effective degradation of PhACs by fungal cultures, and for recalcitrant compounds, using redox mediators increases the degradation efficiency, however they may cause toxicity in the effluent and deactivate the enzyme.
Journal ArticleDOI

Immobilization of laccase on hollow mesoporous carbon nanospheres: Noteworthy immobilization, excellent stability and efficacious for antibiotic contaminants removal.

TL;DR: The immobilization of Lac on HMCs could be potentially applied in environmental remediation of antibiotics and docking results showed that some important residues played the key role in the degradation process.
Journal ArticleDOI

Biocatalytic degradation/redefining “removal” fate of pharmaceutically active compounds and antibiotics in the aquatic environment

TL;DR: This review summarizes up-to-date literature on enzymes as biocatalytic systems and their effective exploitation for the degradation of various antibiotics traces and other pharmaceutically-active compounds present in the water bodies to help readers for a better understanding of antibiotics persistence in the environment.
References
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Journal ArticleDOI

Techno‐Economic Evaluation of Producing Ethanol from Softwood: Comparison of SSF and SHF and Identification of Bottlenecks

TL;DR: The aim of the study was to evaluate the enzymatic processes involved in the production of fuel ethanol from softwood, and found that major economic improvements in both SSF and SHF could be achieved by increasing the income from the solid fuel coproduct.
Journal ArticleDOI

Removal of Antibiotics in Wastewater: Effect of Hydraulic and Solid Retention Times on the Fate of Tetracycline in the Activated Sludge Process

TL;DR: No evidence of biodegradation for tetracycline was observed during the biodegradability test, and sorption was found to be the principal removal mechanism of tetrACYcline in activated sludge.
Journal ArticleDOI

Immobilization of Pycnoporus sanguineus laccase on magnetic chitosan microspheres

TL;DR: In this paper, an enzyme called laccase was immobilized on magnetic chitosan microspheres by adsorption and cross-linking with glutaraldehyde.
Journal ArticleDOI

Antibiotic Resistance Characteristics of Environmental Bacteria from an Oxytetracycline Production Wastewater Treatment Plant and the Receiving River

TL;DR: It is hypothesized that the strong selective pressure imposed by a high concentration of OTC contributes to the wide dissemination of tetracycline resistance genes and other antibiotic resistance genes, possibly through mobile genetic elements.
Journal ArticleDOI

Membrane processes for removal of pharmaceutically active compounds (PhACs) from water and wastewaters

TL;DR: Different aspects of PhAC removal by using membrane separation processes are reviewed, as they have been conventionally known to show high potential in the production of superior quality drinking and industrial water.
Related Papers (5)
Frequently Asked Questions (14)
Q1. What are the contributions in "Polyacrylonitrile-biochar composite nanofibrous membrane" ?

In this study, laccase was immobilized onto homemade Polyacrylonitrile-biochar 15 composite nanofibrous membrane and the obtained biocatalyst was employed for removal of 16 chlortetracycline, a widely used antibiotic, from aqueous media in continuous mode. 

51Using ligninolytic enzymes, especially laccases, that are capable of non-specifically oxidizing a 52 broad range of organic molecules is a promising option for future strategies of wastewater 53 treatment due to the low environmental impact of enzymatic treatment [12]. 

1022.3 Solid-state fermentation 103 Apple pomace (Vergers Paul Jodoin Inc., Quebec, Canada) was used as solid substrate for the 104 production of laccase by T. versicolor. 

In real field applications, the reduction in 331 residence time can result in a downsized reactor and less energy consumption for mixing. 

An adsorptive membrane was fabricated by entrapment of activated biochar into PAN nanofiber 337 through electrospinning process and laccase was immobilized onto this membrane through 338 formation of amidoxime linkage. 

using enzymes in their free forms has drawbacks, such as high cost of 61 production, low stability and problems with reusability which should be addressed before scale-62 up [18]. 

Unlike 223 free laccase, immobilized laccase can be easily separated from the reaction media and reused, 224 which considerably decreases the cost for practical application. 

The presence of CTC along with other 36 pharmaceutically active compounds (PhACs) in water bodies raised concerns among 37 environmentalists over their potential effects on ecosystem and human health [4]. 

Immobilization of enzyme onto a variety of solid supports and especially porous 63 membranes, which are called enzymatic membrane reactors (EMR), is a promising approach to 64 overcome these problems since membranes can provide high surface area for catalytic reaction 65 [4]. 

it is expected that by increasing the flux rate, the collision frequency 315among them is decreased and as a result, the removal efficiency is decreased. 

The surface morphology of the fabricated membranes was examined using an EVO-50 (Zeiss, 153 Germany) scanning electron microscope (SEM) at acceleration voltage of 10 kV. 

In a 210 related study, Xu et al. reported high storage stability of the immobilized laccase onto PAN 211 nanofibrous membrane as it retained 92% of the initial activity after 18 days of storage at 4±1 212 °C, whereas the free laccase showed only 20% of initial activity [25]. 

These 190 adsorbent particles can adsorb the target compounds from influent and consequently prepare 191 enough time for degradation with laccase [21]. 

At a specific pH, the best combination between 246 enzyme and the substrate can occur which results in a highly efficient catalytic reaction.