Microbial approaches for sustainable remediation of dye-contaminated wastewater: a review

Bharathi, Devaraj; Nandagopal, Jaya Ganesh Thiruvengadam; Ranjithkumar, R.; Gupta, Piyush Kumar; Djearamane, Sinouvassane

doi:10.1007/s00203-022-02767-3

Cited by 35 publications

(9 citation statements)

References 113 publications

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“…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. The removal of color compounds from aqueous systems has a substantial challenge and are a matter of utmost urgency.…”

Section: Introductionmentioning

confidence: 99%

“…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%

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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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Section: Introductionmentioning

confidence: 99%

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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“…1 Microorganisms, including bacteria, fungi, microalgae, and cyanobacteria, have proven valuable in treating wastewater containing dyes. 2 Researchers have found that these microorganisms can be used in two ways: as pure cultures or as a consortium. 3 When used in a mixed population, they can accomplish tasks that might be otherwise difficult or impossible for a single culture, often requiring multiple steps.…”

Section: Introductionmentioning

confidence: 99%

“…Microorganisms, including bacteria, fungi, microalgae, and cyanobacteria, have proven valuable in treating wastewater containing dyes 2 . Researchers have found that these microorganisms can be used in two ways: as pure cultures or as a consortium 3 .…”

Section: Introductionmentioning

confidence: 99%

Nanoremediation of toxic dyes using a bacterial consortium immobilized on cellulose acetate nanofiber mats

Erkoç,

Tüzün,

Korkmaz

et al. 2023

Polymer Engineering & Sci

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Stenotrophomonas maltophilia and Ochrobactrum sp. demonstrated the highest rates of dye bioremediation. The trials were performed at pH 8, which resulted in the highest bioremediation rate of 64.6% in media containing 21.2 mg L−1 dye. As the dye concentration increased, the pollutant removal decreased, with the maximum bioremoval rate of 70.3%. The removal capacity was increased with an increase in biomass concentration; the highest yield of 91.3% was obtained in media containing 14.2 mg L−1 dye and 12% (v/v) biomass. In nanoremediation studies, the bacterial consortium was immobilized on cellulose acetate nanofiber mats (CA‐NFM). Scanning electron microscopic micrographs showed that bead‐free nanofiber mats were effective in immobilizing bacterial cells. Moreover, nanofiber structures were capable of supporting exopolysaccharides formation, as confirmed by Fourier transform ınfrared spectroscopy. The bacterial consortium immobilized on CA‐NFM showed a maximum bioremoval rate of 56.5%. Reusability tests demonstrated that the consortium immobilized CA‐NFM could be used at least five times. Furthermore, after leaving the mat for 1 month at 4°C, it was still usable, and the removal efficiency was found to be 45.4%. Based on our findings, bacteria immobilized on CA‐NFM have the potential to be used as highly effective and versatile nanobiotechnological biological sorbents in the treatment of wastewater containing dyes.Highlights Stenotrophomonas maltophilia and Ochrobactrum sp. were used as a bacterial consortium. Bacterial consortium immobilized on cellulose acetate nanofiber mats (CA‐NFM) was tested. EPS production by the consortium was confirmed by Fourier transform ınfrared spectroscopy analysis. CA‐NFM could be used at least five times.

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“…Dye wastewater also contains large amounts of sulfur, chloride, bromine, metal ions, inorganic salts, and organic salts and has a high chemical oxygen demand, which makes subsequent degradation and treatment extremely difficult [10]. Many dyes can cause allergies, cancer, and mutations in living organisms, posing a serious threat to biological health [11]. Dyes have complex molecular structures that are difficult to degrade in the natural environment and can pose a serious risk to the environment [12].…”

Section: Introductionmentioning

confidence: 99%

Simple Preparation of Lignin-Based Phenolic Resin Carbon and Its Efficient Adsorption of Congo Red

Su,

Li,

Wang

et al. 2023

Water

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Biomass porous carbon is a low-cost, environmentally friendly material with no secondary pollution and has great potential in the field of dye pollutant adsorption. In this work, we used lignin, a renewable resource abundant in nature, to completely replace phenol and develop a lignin-based phenolic resin carbon (LPFC) adsorbent with high dye removal capacity, high recyclability, and low production cost. The samples were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. Then the effects of adsorbent dosage (1 g/L, 2 g/L, 3 g/L, 4 g/L, and 5 g/L), temperature (30 °C, 45 °C, and 60 °C), initial dye concentration (100, 200, 300, 400, 500, 600, 700, and 800 mg/L), and pH (3, 4, 6, 8, 10, and 12) on the adsorption capacity were investigated during the adsorption process. The experimental results showed that the pore structure of LPFC was richer and more graphitized than that of phenolic resin carbon (PFC). The adsorption performance of LPFC on CR was better than that of PFC. The adsorption characteristics of LPFC were investigated from the adsorption isotherm and kinetic perspectives. The Langmuir isothermal adsorption model and the proposed second-order kinetic model were able to fit the adsorption data better. The adsorption process preferred monolayer adsorption, and the proposed second-order model predicted a maximum adsorption capacity of 425.53 mg/g. After five cycles, the removal of CR by LPFC only decreased from 92.1 to 79.2%. It can be seen that LPFC adsorbents have great potential in the field of wastewater treatment and can effectively realize the high-value application of lignin.

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Microbial approaches for sustainable remediation of dye-contaminated wastewater: a review

Cited by 35 publications

References 113 publications

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

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

Nanoremediation of toxic dyes using a bacterial consortium immobilized on cellulose acetate nanofiber mats

Simple Preparation of Lignin-Based Phenolic Resin Carbon and Its Efficient Adsorption of Congo Red

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