Bioremediation of synthetic dyes from wastewater by using microbial nanocomposites: An emerging field for water pollution management

Bera, Surojit

doi:10.1016/j.bcab.2023.102767

Cited by 10 publications

(6 citation statements)

References 58 publications

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“…In this study, the removal of methyl orange dye from aqueous solutions was performed and studied using activated carbon as an adsorbent material. The optimal conditions of the studied remediation process were determined through experiments in which four operational parameters were varied: dosage effect (0.001-0.010 g AC), interaction time (1-120 min), MO concentration (5-100 mg/L MO), and pH (3)(4)(5)(6)(7)(8)(9)(10)(11). pH and adsorbent dosage proved to be the most influential parameters for the adsorption of MO.…”

Section: Discussionmentioning

confidence: 99%

“…The discharge of vast quantities of organic contaminants into the environment is a major concern globally [1]. Synthetic dyes are a class of contaminants that must be removed from wastewater before being discharged into aquatic ecosystems due to their toxicity and negative repercussions on photosynthetic activity [2,3]. Once in natural bodies of water, dyes lead to an increase in color saturation, thus preventing the penetration of sunlight into the water, and thereby endangering the life of aquatic organisms [4].…”

Section: Introductionmentioning

confidence: 99%

“…In this context, the aim of this research had six objectives: (1) to optimize the MO adsorption conditions (pH, MO concentration, adsorbent dosage, and contact time); (2) to fit the equilibrium experimental results using Langmuir and Freundlich adsorption isotherm models; (3) to study the kinetic process of the MO adsorption (pseudo-first-order, pseudosecond-order, and intra-particle diffusion); (4) to determine thermodynamic parameters of the adsorption process; (5) to apply optimized adsorption conditions in order to remove MO from real wastewater samples; and (6) to determine desorption characteristics and reusability of the commercial AC. Compared to other studies, this work reports a simple, fast, eco-friendly, and efficient method for MO removal from aqueous solutions using commercial activated carbon, with good results in wastewater treatment and reusability (up to five cycles).…”

Section: Introductionmentioning

confidence: 99%

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Removal Efficiency and Adsorption Kinetics of Methyl Orange from Wastewater by Commercial Activated Carbon

Serban,

Iancu,

Dinu

et al. 2023

Sustainability

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This research investigates commercial activated carbon (AC) potential to remove methyl orange (MO) dye removal from aqueous solution using a batch process. The AC material was characterized using FTIR spectroscopy and SEM analysis. The effect of the main operating parameters, such as the pH, adsorbent dosage, contact time, and initial dye concentration, was studied. MO removal could be accomplished within 30 min at a pH value of 3. The calculated maximum MO adsorption capacity onto activated carbon was 129.3 mg/g, while the removal efficiency was 97.8%. Adsorption results were analyzed by studying the Langmuir and Freundlich isotherm models. The MO adsorption data on activated carbon were better explained by the Langmuir isotherm than by the Freundlich isotherm. The pseudo-second-order kinetic model may have had an effect on the MO dye adsorption on AC material. This research showed that the commercial activated carbon can be used as an effective sorbent for MO removal from wastewater sample. Moreover, the AC material has good reusability and practical utilization capacities.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Removal Efficiency and Adsorption Kinetics of Methyl Orange from Wastewater by Commercial Activated Carbon

Serban,

Iancu,

Dinu

et al. 2023

Sustainability

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“…1 Among the various industrial toxic contaminants, dyes have been recognized as significant environmental hazards that cause threats to both aquatic organisms and human health. 2 Dye compounds often possess complicated structures that incorporate functional groups responsible for the chromophore and auxochrome. 3 Therefore, the degradation of such compounds becomes more complex.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of chitosan and gum arabic functionalized silver nanocomposite for efficient removal of methylene blue and antibacterial activity

Bharathi,

Wadaan,

Mythili

et al. 2024

Polymers for Advanced Techs

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The discharge of industrial effluent has a harmful effect on the aquatic ecosystems and surrounding environment. The unprocessed discharge of organic dyes into the aquatic environment is a significant contributor to the aquatic pollution. Hence, it is imperative to ensure the proper disposal of organic colorants and their derivatives before their discharge into wastewater. The present study aimed to synthesis silver (Ag) nanocomposite using gum arabic (GA) and chitosan (CS) by an environment‐friendly and sustainable method. The formulated Ag nanocomposite was characterized using UV–visible, FTIR, TEM coupled with EDS. The FTIR analysis demonstrated the existence of polymers that have a crucial role in the formation of nano‐Ag‐composite. TEM revealed that the synthesized Ag nanocomposite had a spherical nanostructure, with diameters ranging from 18 to 95 nm. Further studies were conducted on Ag nanocomposite to analyze the breakdown of Methylene Blue (MB) under visible light irradiation. The synthesized Ag nanocomposite demonstrated a removal efficiency of 93.3% for MB after 60 min. Furthermore, the reusability of the Ag nanocomposite was studied, and it demonstrated substantial photocatalytic activity after three consecutive cycles. In addition, Ag nanocomposite (100 μg/mL) demonstrated potential inhibition against Escherichia coli (20 mm) and Staphylococcus aureus (18 mm). Finally, our findings showed that the synthesized nanocomposite can be employed as an outstanding photocatalyst and also bactericidal agent in both industrial and clinical sectors.

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“…These dyes have typically been employed in the dyeing of cellulose-based fabrics, wool, and polyamide fibers [21]. Although dyes have found widespread application in industries, their extensive use and consequential discharge have led to significant environmental contamination, resulting in adverse impacts on both ecological ecosystems and human health [22]. During the dyeing process, approximately 10% to 15% of dyes are discharged into wastewater, causing serious environmental and health problems.…”

Section: Introductionmentioning

confidence: 99%

Effective Decolorization and Detoxification of Single and Mixed Dyes with Crude Laccase Preparation from a White-Rot Fungus Strain Pleurotus eryngii

Ge,

Deng,

Wang

et al. 2024

Molecules

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To fully harness the potential of laccase in the efficient decolorization and detoxification of single and mixed dyes with diverse chemical structures, we carried out a systematic study on the decolorization and detoxification of single and mixed dyes using a crude laccase preparation obtained from a white-rot fungus strain, Pleurotus eryngii. The crude laccase preparation showed efficient decolorization of azo, anthraquinone, triphenylmethane, and indigo dyes, and the reaction rate constants followed the order Remazol Brilliant Blue R > Bromophenol blue > Indigo carmine > New Coccine > Reactive Blue 4 > Reactive Black 5 > Acid Orange 7 > Methyl green. This laccase preparation exhibited notable tolerance to SO42− salts such as MnSO4, MgSO4, ZnSO4, Na2SO4, K2SO4, and CdSO4 during the decolorization of various types of dyes, but was significantly inhibited by Cl− salts. Additionally, this laccase preparation demonstrated strong tolerance to some organic solvents such as glycerol, ethylene glycol, propanediol, and butanediol. The crude laccase preparation demonstrated the efficient decolorization of dye mixtures, including azo + azo, azo + anthraquinone, azo + triphenylmethane, anthraquinone + indigo, anthraquinone + triphenylmethane, and indigo + triphenylmethane dyes. The decolorization kinetics of mixed dyes provided preliminary insight into the interactions between dyes in the decolorization process of mixed dyes, and the underlying reasons and mechanisms were discussed. Importantly, the crude laccase from Pleurotus eryngii showed efficient repeated-batch decolorization of single-, two-, and four-dye mixtures. This crude laccase demonstrated high stability and reusability in repeated-batch decolorization. Furthermore, this crude laccase was efficient in the detoxification of different types of single dyes and mixed dyes containing different types of dyes, and the phytotoxicity of decolorized dyes (single and mixed dyes) was significantly reduced. The crude laccase efficiently eliminated phytotoxicity associated with single and mixed dyes. Consequently, the crude laccase from Pleurotus eryngii offers significant potential for practical applications in the efficient decolorization and management of single and mixed dye pollutants with different chemical structures.

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Bioremediation of synthetic dyes from wastewater by using microbial nanocomposites: An emerging field for water pollution management

Cited by 10 publications

References 58 publications

Removal Efficiency and Adsorption Kinetics of Methyl Orange from Wastewater by Commercial Activated Carbon

Removal Efficiency and Adsorption Kinetics of Methyl Orange from Wastewater by Commercial Activated Carbon

Synthesis of chitosan and gum arabic functionalized silver nanocomposite for efficient removal of methylene blue and antibacterial activity

Effective Decolorization and Detoxification of Single and Mixed Dyes with Crude Laccase Preparation from a White-Rot Fungus Strain Pleurotus eryngii

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