scholarly journals Laccase Immobilized onto Zirconia–Silica Hybrid Doped with Cu2+ as an Effective Biocatalytic System for Decolorization of Dyes

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1252 ◽  
Author(s):  
Katarzyna Jankowska ◽  
Filip Ciesielczyk ◽  
Karolina Bachosz ◽  
Jakub Zdarta ◽  
Ewa Kaczorek ◽  
...  
Keyword(s):  
Textile Industry ◽  
Copper Ions ◽  
Enzyme Stability ◽  
Artemia Salina ◽  
Stability Parameters ◽  
Oxide Support ◽  
Enzymatic Decolorization ◽  
Before And After ◽  
Living Organisms ◽  
Laccase Immobilization

Nowadays, novel and advanced methods are being sought to efficiently remove dyes from wastewaters. These compounds, which mainly originate from the textile industry, may adversely affect the aquatic environment as well as living organisms. Thus, in presented study, the synthesized ZrO2–SiO2 and Cu2+-doped ZrO2–SiO2 oxide materials were used for the first time as supports for laccase immobilization, which was carried out for 1 h, at pH 5 and 25 °C. The materials were thoroughly characterized before and after laccase immobilization with respect to electrokinetic stability, parameters of the porous structure, morphology and type of surface functional groups. Additionally, the immobilization yields were defined, which reached 86% and 94% for ZrO2–SiO2–laccase and ZrO2–SiO2/Cu2+–laccase, respectively. Furthermore, the obtained biocatalytic systems were used for enzymatic decolorization of the Remazol Brilliant Blue R (RBBR) dye from model aqueous solutions, under various reaction conditions (time, temperature, pH). The best conditions of the decolorization process (24 h, 30 °C and pH = 4) allowed to achieve the highest decolorization efficiencies of 98% and 90% for ZrO2–SiO2–laccase and ZrO2–SiO2/Cu2+–laccase, respectively. Finally, it was established that the mortality of Artemia salina in solutions after enzymatic decolorization was lower by approx. 20% and 30% for ZrO2–SiO2–laccase and ZrO2–SiO2/Cu2+–laccase, respectively, as compared to the solution before enzymatic treatment, which indicated lower toxicity of the solution. Thus, it should be clearly stated that doping of the oxide support with copper ions positively affects enzyme stability, activity and, in consequence, the removal efficiency of the RBBR dye.

scholarly journals Congo Red Decolorization Using Textile Filters and Laccase-Based Nanocomposites in Continuous Flow Bioreactors

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1227 ◽  
Author(s):  
Natalia Lopez-Barbosa ◽  
Sergio Leonardo Florez ◽  
Juan C. Cruz ◽  
Nancy Ornelas-Soto ◽  
Johann F. Osma
Keyword(s):  
Congo Red ◽  
Continuous Flow ◽  
Textile Industry ◽  
Dye Decolorization ◽  
Pycnoporus Sanguineus ◽  
Water As Solvent ◽  
Before And After ◽  
Activity Loss ◽  
Laccase Immobilization ◽  
Hydrophobic Supports

Removal of azo and diazo dye content from textile industry wastewaters is crucial due to their environmental impact. Here, we report on the use of the fungal laccase from Pycnoporus sanguineus CS43 immobilized on silica nanoparticles and entrapped in textile-based filters for the degradation of Congo Red. Laccase immobilization and synthesis of the nanocomposites were carried out by two different methods, one in the presence of acetone and the second using water as solvent. This led to a change in the hydrophobicity of the obtained biofilters. Successful preparation of the nanocomposites was confirmed via FTIR spectroscopy. Changes in the secondary structure of the enzyme were inspected through the second derivative of the FTIR spectra. Six different types of filter were fabricated and tested in a continuous flow bioreactor in terms of their decolorization capabilities of Congo Red. The results indicate removal efficiencies that approached 40% for enzymes immobilized on the more hydrophobic supports. Backscattered electron (BSE) images of the different filters were obtained before and after the decolorization process. Percentage of decolorization and activity loss were determined as a function of time until a plateau in decolorization activity was reached. Experimental data was used to recreate the decolorization process in COMSOL Multiphysics® (Stockholm, Sweden). These simulations were used to determine the proper combination of parameters to maximize decolorization. Our findings suggest that the treatment of textile-based filters with immobilized laccase in conjunction with hydrophobic nanocomposites provides a suitable avenue to achieve more efficient laccase dye decolorization (39%) than that obtained with similar filters treated only with free laccase (8%). Filters treated with silica-based nanocomposites and immobilized laccases showed an increase in their decolorization capability, probably due to changes in their wetting phenomena.

The Banco de Avío

2021 ◽  
pp. 442-464
Author(s):  
Eric Van Young
Keyword(s):  
Development Strategy ◽  
Textile Industry ◽  
The State ◽  
Development Bank ◽  
Long Term Effects ◽  
Before And After ◽  
Silver Mining ◽  
Short And Long Term ◽  
Textile Sector

At Alamán’s initiative a law of 1830 established the Banco de Avío, a government-funded development bank for the spurring of industrialization, especially in the textile sector, with which his name has forever been associated. His views of industrialization as a development strategy as opposed to a renewed reliance upon silver mining are discussed, as well as the short- and long-term effects of loans made to textile entrepreneurs and the cronyism employed by Alamán both in organizing the Banco itself and in allotting its capital as loans to industrialists. The state of the textile industry in Mexico before and after the Banco is described.

scholarly journals Effect of 10 UV Filters on the Brine Shrimp Artemia salina and the Marine Microalga Tetraselmis sp.

Toxics ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 29
Author(s):  
Evane Thorel ◽  
Fanny Clergeaud ◽  
Lucie Jaugeon ◽  
Alice M. S. Rodrigues ◽  
Julie Lucas ◽  
...  
Keyword(s):  
Brine Shrimp ◽  
Artemia Salina ◽  
Trophic Levels ◽  
Aquatic Environments ◽  
Uv Filters ◽  
Personal Care Product ◽  
Marine Microalga ◽  
High Concentrations ◽  
Living Organisms ◽  
First Time

The presence of pharmaceutical and personal care product (PPCP) residues in the aquatic environment is an emerging issue due to their uncontrolled release through gray water, and accumulation in the environment that may affect living organisms, ecosystems and public health. The aim of this study is to assess the toxicity of benzophenone-3 (BP-3), bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT), butyl methoxydibenzoylmethane (BM), methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT), 2-ethylhexyl salicylate (ES), diethylaminohydroxybenzoyl hexyl benzoate (DHHB), diethylhexyl butamido triazone (DBT), ethylhexyl triazone (ET), homosalate (HS) and octocrylene (OC) on marine organisms from two major trophic levels, including autotrophs (Tetraselmis sp.) and heterotrophs (Artemia salina). In general, results showed that both HS and OC were the most toxic UV filters for our tested species, followed by a significant effect of BM on Artemia salina due to BM—but only at high concentrations (1 mg/L). ES, BP3 and DHHB affected the metabolic activity of the microalgae at 100 µg/L. BEMT, DBT, ET, MBBT had no effect on the tested organisms, even at high concentrations (2 mg/L). OC toxicity represents a risk for those species, since concentrations used in this study are 15–90 times greater than those reported in occurrence studies for aquatic environments. For the first time in the literature, we report HS toxicity on a microalgae species at concentrations complementing those found in aquatic environments. These preliminary results could represent a risk in the future if concentrations of OC and HS continue to increase.

scholarly journals THE IMPACT OF EMERGENCIES ON THE SPREAD OF INVASIVE DISEASES OF FARM ANIMALS IN THE REPUBLIC OF KHAKASSIA

2021 ◽  
pp. 336-341
Author(s):  
Medkova ◽  
Krasovskaya
Keyword(s):  
Large Scale ◽  
Ground Cover ◽  
Farm Animals ◽  
Fecal Samples ◽  
Study Results ◽  
Invasive Diseases ◽  
Before And After ◽  
The Republic ◽  
Living Organisms ◽  
The Impact

In the conditions of the Shirinsky District, monitoring was carried out for the first time for the change in number of helminthic diseases before and after fires. Fires have led to changes in the properties of the ground cover, soil, and simplification of communities; the complex of soil-dwelling arthropods has undergone a number of significant changes, which are manifested in a decrease in number and species diversity. The aim of the study is to determine the prevalence of various parasites in farm animals after large-scale fires on the example of the Shirinsky District of the Republic of Khakassia. The study subject was eggs, larvae and helminths of the studied animals. The study object was farm animals. The studies were carried out by the method of sequential washing of fecal samples. Based on the study results of 786 fecal samples from various animals, we received the following results. We have proved that the fire had a great impact on the parasitofauna of animals in the Shirinsky District; the number of invasive diseases first decreased after fires and then increased again. We found out that the decrease in number of parasitic diseases was associated with the following: fires had an adverse effect on the ecological state of the environment and changed the existence conditions of living organisms. The fire destroyed eggs, larvae and definitive hosts of the parasites.

scholarly journals Aspergillus sp. For Indigosol Blue and Remazol Brilliant Blue R Decolorization

2020 ◽  
Vol 2 (3) ◽  
pp. 435
Author(s):  
Fitria Ayudi Ulfimaturahmah ◽  
Ratna Stia Dewi ◽  
Ajeng Arum Sari
Keyword(s):  
Textile Industry ◽  
Environmental Problem ◽  
Ph Value ◽  
Dye Decolorization ◽  
Brilliant Blue ◽  
Blue Dye ◽  
Synthetic Dyes ◽  
Remazol Brilliant Blue R ◽  
Living Organisms ◽  
Aspergillus Sp

Synthetic dyes are artificial dyes manufactured by Industry and commonly used for the textile industry. These dyes had potentially caused an environmental problem. Many types of dyes are recalcitrant and have toxic properties for living organisms. It can be removed by decolorization method, especially a biological decolorization by fungi. Fungi were chosen due to the ability to degrade toxic components. Aspergillus sp. is the fungi which commonly used for dye decolorization. It might be caused that Aspergillus sp. is one type of fungi lived in the textile waste and expected not to die in the dye decolorization treatment. The purpose of this research was to investigate the ability of the mycelia pellets of Aspergillus sp to decolorized Indigosol Blue dye and Remazol Brilliant Blue R (RBBR) dye. This research showed that mycelial pellets of Aspergillus sp. had high activity of decolorization of Indigosol Blue dye up to 85.37% and RBBR dye up to 80.21% and caused low pH value after 24 hour incubation time compared to the control solution.

scholarly journals Physiologo-morphological features of common wheat under the influence of helium-neon laser

2020 ◽  
Vol 159 ◽  
pp. 08002
Author(s):  
Zhanna Abdrassulova ◽  
Sultan Tuleukhanov ◽  
Gani Issayev ◽  
Kuralai Pernebek ◽  
Shermahan Shapalov
Keyword(s):  
Triticum Aestivum ◽  
Common Wheat ◽  
Research Work ◽  
Triticum Aestivum L ◽  
Special Importance ◽  
Physiological Indicators ◽  
Comparative Aspect ◽  
Before And After ◽  
Living Organisms ◽  
Electromagnetic Radiations

The research work is devoted to researching the comparative influence of electromagnetic radiations with wavelengths on various physiological and morphological parameters of four common wheat Triticum aestivum L. cultivars from Kazakhstan and Egypt. The comprehensive studies concerning various Functional mechanisms of living organisms under the action of electromagnetic radiations is a problem of special priority in biophysics and photobiology, revealing the general and specific plant resistance features to a given radiation source. These are of special importance when electromagnetic irradiations are carried out using various wavelengths, expositions and power intensities. The reactivity responses of living organisms to the action of various physical radiations usually take a part both metabolically and anatomo-morphologically, that is directed mainly to maintaining homeostasis. The purpose was based to reveal the morphological and physiological indicators of seeds and plants of four common wheat Triticum aestivum L. in a comparative aspect before and after the influence of electromagnetic radiations with wavelengths of 400.0 - 800.0 nm. The specific seed reactions feature of Triticum aestivum L have been established after the influence of electromagnetic radiations applying expositions and wavelengths.

Laccase Immobilization onto Magnetic β-Cyclodextrin-Modified Chitosan: Improved Enzyme Stability and Efficient Performance for Phenolic Compounds Elimination

2018 ◽  
Vol 26 (8) ◽  
pp. 755-762 ◽  
Author(s):  
Roghayeh Tarasi ◽  
Masoumeh Alipour ◽  
Lena Gorgannezhad ◽  
Somaye Imanparast ◽  
Aliakbar Yousefi-Ahmadipour ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Enzyme Stability ◽  
Modified Chitosan ◽  
Efficient Performance ◽  
Laccase Immobilization

scholarly journals Antibacterial and Antibiofilm Activity of Methanolic Plant Extracts against Nosocomial Microorganisms

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Eduardo Sánchez ◽  
Catalina Rivas Morales ◽  
Sandra Castillo ◽  
Catalina Leos-Rivas ◽  
Ledy García-Becerra ◽  
...  
Keyword(s):  
Plant Extracts ◽  
Lethal Dose ◽  
Artemia Salina ◽  
Antibiofilm Activity ◽  
Dependent Manner ◽  
Opuntia Ficus Indica ◽  
Abiotic Surfaces ◽  
Before And After ◽  
Dose Concentration ◽  
Well Assay

Biofilm is a complex microbial community highly resistant to antimicrobials. The formation of biofilms in biotic and abiotic surfaces is associated with high rates of morbidity and mortality in hospitalized patients. New alternatives for controlling infections have been proposed focusing on the therapeutic properties of medicinal plants and their antimicrobial effects. In the present study the antimicrobial and antibiofilm activities of 8 methanolic plant extracts were evaluated against clinical isolated microorganisms.Preliminary screening by diffusion well assay showed the antimicrobial activity ofProsopis laevigata,Opuntia ficus-indica, andGutierrezia microcephala. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined ranging from 0.7 to >15 mg/mL. The specific biofilm formation index (SBF) was evaluated before and after the addition of plant extracts (MBC × 0.75).Opuntia ficus-indicacaused the major reduction on SBF in dose-dependent manner. Cytotoxic activity of plant extracts was determined using brine shrimp lethality test (Artemia salinaL.). Lethal Dose concentration (LD50values) of the plant extracts was calculated. LD50values forP. laevigataandG. microcephalawere 141.6 and 323.3 µg/mL, respectively, whileO. ficus-indicashowed a slight lethality with 939.2 µg/mL. Phytochemical analyses reveal the presence of flavonoids, tannins, and coumarines.

scholarly journals A Study on Improving Dyeability of Polyester Fabric Using Lipase Enzyme

2020 ◽  
Vol 20 (3) ◽  
pp. 243-249 ◽  
Author(s):  
Jeyaraman Anandha Kumar ◽  
M. Senthil Kumar
Keyword(s):  
Weight Loss ◽  
Textile Industry ◽  
Surface Damage ◽  
Polyester Fabric ◽  
Enzyme Treatment ◽  
Dye Uptake ◽  
Synthetic Fibers ◽  
Lipase Enzyme ◽  
Before And After ◽  
Carboxylic Groups

AbstractEnzymatic hydrolysis on synthetic fibers enhances the hydrophilicity and solves the concerns regarding the environmental issues of textile industry. Lipase hydrolyses ester linkages in polyethylene terephthalate and produces polar hydroxyl and carboxylic groups. The study aims to identify and investigate the effect of enzyme treatment on weight loss and surface modification of polyester fabrics. Also the functional groups present before and after treatment and the effect of enzyme treatment on the improvement of dye uptake are studied. The test indicates that enzymatic process creates less surface damage, weight loss and improved moisture regain, dye uptake, and shear properties.

Influence of Copper Ions on Mechanical Properties of PVA-Based Nanofiber Textiles

2013 ◽  
Vol 486 ◽  
pp. 201-204 ◽  
Author(s):  
Zuzana Rácová ◽  
Pavla Ryparová ◽  
Richard Hlaváč ◽  
Pavel Tesárek ◽  
Václav Nežerka
Keyword(s):  
Mechanical Properties ◽  
Polymer Solution ◽  
Tensile Testing ◽  
Textile Industry ◽  
Civil Engineering ◽  
Copper Ions ◽  
Reference Sample ◽  
Antibacterial Treatment ◽  
Strength And Stiffness

The nanofiber textiles are utilized in the textile industry, as a treatment of exposed surfaces, they find their use in medicine and in future they might be used in civil engineering as vapor barriers. For some applications it is advantageous to use the textiles with special, e.g. antibacterial, treatment by means of silver or copper ions. This paper is focused on the determination of mechanical properties of PVA-based nanofiber textiles produced by electro-spinning. The polymer solution used for electrospinning contained copper in the form of ions. The results of the tensile testing were compared with the results for the reference sample without any additives. The results indicate that the addition copper ions cause an increase of the strength and stiffness.

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