Microbial Biodegradation and Decolourization of Textile Dyes: Comparison
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Please note this is a comparison between Version 2 by Catherine Yang and Version 1 by Virendra Kumar Yadav.

Dyes are frequently applied to many substrates in edibles, cosmetics, paper, rubber, and products of textile industries. Microbial-based bioremediation of dyes effluent from wastewater is the most economical and reliable globally. Azo dyes are a valuable family of dyes with the most significant colour diversity. Microorganisms degrade azo dyes in anaerobic conditions with the assistance of azoreductase, resulting in colourless aromatic amines as a by-product. Broadly, dye-degrading microbes could be classified as actinomycetes, bacteria, fungi, and algae. Moreover, based on the nature of microbes and the pathway followed for degradation it could be again aerobic and anaerobic degraders.

  • bioremediation
  • bacteria
  • fungi
  • microalgae

1. Bioremediation of Dyes by Actinomycetes

Actinomycetes are fungi-like, filamentous bacteria with high GC content generally present in the soil. Extracellular peroxidases produced by actinomycetes, especially Streptomyces species, are known to play a role in lignin biodegradation [31][1]. The initial oxidation of lignin is carried out by the peroxidase released by the Streptomyces, into different water-soluble polymeric compounds. It has also been observed that the actinomycetes catalyse hydroxylation, oxidation, and dealkylation reactions in the presence of xenobiotics [32][2]. Three groups initially looked into the potential of actinomycetes to decolorize and mineralize textile dyes. Ball et al., tested 20 actinomycetes strains from various genera for their potential to bleach polymeric dye Poly R in 1989. Streptomyces badius 252, Thermomonospora fusca MT800, and Streptomyces sp. strain EC22 were the only three strains that greatly decolorized dye [6][3].
Following that, it embarked on a more extensive screening procedure that looked at the decolorizing ability of 159 actinomycetes. Investigators who utilized real textile effluents in the screening process were excited about this research. Five different effluents were used, each having a single dye of known concentration. Structurally each dye was different from azo compound RR147 to phthalocyanine Reactive Blue 116. Positive findings were obtained for 83 isolates, demonstrating the extensive potential of actinomycetes to cause dye decolourization. Given compounds’ resistance to mineralization by other bacteria under similar conditions, a discovery that actinomycetes can aerobically decolourize and degrade azo dyes was important.
Finally, but perhaps most importantly, a team led by Don Crawford at the University of Idaho began investigating the potential of lignin lytic microbes, including white-rot fungi and Streptomyces, to mineralize and decolourize textile dyes. Initially, the ability of 14 Streptomyces to decolourize two polymeric dyes, Poly B-411 and Poly R-478, as well as azo dye Remazol Brilliant Blue R, was investigated (RBBR). With two dyes, RBBR and Poly B-411, nearly similar findings were reported, indicating a close link between the isolate’s ability to decolourize dyes and its ligninolytic ability. This investigation and the fact that extracellular H2O2 synthesis increased when actinomycetes sps, were allowed to grow in the presence of glucose indicated that peroxidases were involved in the decolourization process. Extracellular peroxidases were previously discovered in Streptomyces bacteria, and enzymes were exhibited to have substrate specificities identical to P. chrysosporium’s Mn (II)-peroxidase [33][4]. Surprisingly, there was no association between decolorizing activity and ligninolytic activity with the 3rd pigment, Poly R-478 [34][5]. Enzymatic processes that take place during the decolourization of this dye are unknown. [8][6]. Recently Blanquez et al., 2019 reported 6–70% removal of AO-63 by using Stp. Ipomoeae CECT 3341, from the textile dyes [35][7]. Actinomycetes-based removal of various dyes is shown in Table 1, where the removal percentage of dyes varies from 3–100%.
Table 1.
 Degradation of dyes by using actinomycetes.
Actinomycetes Dyes Used Efficiency References
Streptomyces sp. S27 MR 99% [36][8]
Streptomyces bacillaris Triphenylmethane dyes: MG,

MV, CV, and CB		 MG (94.7%), MV (91.8%),

CV (86.6%), CB (68.4%)		 [37][9]
Streptomyces ipomoeae

CECT 3341		 AO63 6–70% [38][10]
Streptomyces sviceus (marine) CR-21   [39][11]
Streptomyces sps RR 147 (azo)

RR 171

RB 114

RB 209

RB 116		 3–100% [40][12]
Streptomyces sps MG,

MV,

CV

CB		 (MG 95%, MV 92%, CV 87%,

CB 68%).		 [41][13]

2. Bioremediation of Dyes by Aerobic Bacteria

It is very difficult to isolate bacteria that could aerobically decolorize and mineralize dyes, except for actinomycetes. Various studies claim that different azo dyes can be converted aerobically, out of which one study reveals the development of the green color of instant chocolate puddings. including one notable study on the greening of instant chocolate puddings. It has been found that these preadapted aerobic bacteria obtain their energy by utilizing some carboxylated analogues of sulfonated azo compounds as their sole carbon and energy supply [9][14].
Orange-I azo-reductase [NAD(P)H:1-(4′-sulfophenylazo)-4-naphthol oxidoreductase] and Orange II azo-reductase [NAD(P)H:1-(4′-sulfophenylazo)-2-naphthol oxidoreductase] is distilled and characterized from Pseudomonas. Both of these enzymes are now categorized as the same enzyme, which is called azo-benzene reductase (EC 1.6.6.7). Aside from azo dyes, bacteria’s ability to aerobically metabolize other dye groups has piqued interest, but with little success. Aerobic mineralization of triphenylmethane pigment, MV, by a strain of Pseudomonas mendocina MCM B-402 was recently discovered. Isolate’s sole carbon and energy source was MV, which has several industrial uses in addition to its well-known utilization as a regular bacteriological and histological stain. According to preliminary research, Ps. mendocina degraded dye to phenol by a variety of unspecified metabolites, which then joined the ketoadipic acid pathway [10][15].
Karim et al., 2018 and Mustafa et al., 2022 reported the decolourization of reactive dyes of textiles by using monoculture and consortium.
John et al., 2020 reported the utilization of a halophilic bacterium (Salinivibrio kushneri HTSP) for the biological decolourization of synthetic dyes (CBB G-250 and Congo red and safranin). Originally this strain was isolated from the saltpan for decolourization and bioremediation of dyes. The investigators obtained about 80% decolorization within 48 h. The further investigator reported that the rate of decolorization by using a particular bacterial strain was in the order of CR > CBBG-25 > Safranin [42][16].
Aktar et al., 2020 isolated Bacillus sp. and Staphylococcus aureus from the textile dye effluent and applied them for the decolorization and degradation of BY HP-2R, BR-RS, and BR RS 01 (BB) dyes. The removal efficiency of BR and BB reached up to 71% and 83% with Bacillus sps. While with Staph. aureus efficiency of BY dye reached 79% after five days [43][17].
Shete et al., 2020 isolated Bacillus sps, Klebsiella, and Pseudomonas sps, from textile effluent and applied them for the decolorization of JR, JF, and JGY dyes. The removal or decolorization of dyes was achieved from 45–50% for the following dyes under optimized conditions [44][18]. Khaled et al., 2022, applied Bacillus cereus (B. Cereus) and Pseudomonas parafulva (Ps. parafulva) for the decolorization of textile azo dyes (T-blue, yellow GR, and orange 3R,) and obtained the removal efficiency of up to 91.69 and 89.21% for orange 3R [45][19]. Table 2 shows summarized studies of bacterial-based dye removal from the wastewater. From all the studies it was found that in some of the studies bacteria was used directly, while in some cases their dry powder was used while in a few cases a bacterial consortium was also used. In some of the studies, the dye removal was achieved up to 100% either with monoculture or with the consortium. Some of the bacterial consortiums reached up to 97–99% dye removal within a short period of time.
Table 2.
 Microbial remediation of dyes by using aerobic and aerobic bacteria.
Bacteria Dyes Used Efficiency References
Aeromonas hydrophila

A.   Hydrophila SK16		 RR141

MG

Acid fast yellow MR		 70–80%

96.8%

91.25%		 [18,46,47][20][21][22]
Comamonas sps UVS DB GL, DB5B   [48][23]
Bacillus sp. and

Staph. aureus		 BY HP-2R, BS-RS, and B. blue RS 01 (BB) 71–83% [43][17]
Alcaligenes faecalis AZ26,

Bacillus cereus AZ27 and Bacillus sp.		 NSB-G 90% [49][24]
Brevibacillus laterosporus DB-MR,

MO, Blue-2B,

Golden yellow (GY)

Brilliant blue		 100% [50][25]
Shewanella oneidensis (MFC) Acid orange (AO 7) 80.4 [51][26]
Alcaligenes faecalis and Rhodococcus erythropolis Monoazo dye Acid orange 80–95 [52][27]
Consortium of

Ps. aeruginosa, B. pumilis, B. thuringiensis, Enterococcus faecium in different combinations		 NR,

N Black,

N Blue dk,

N Navy,

N Yellow		 82–97% [53][28]
Neisseria sp., Vibrio sp., Bacillus sp., Bacillus sp. and Aeromonas sps N Orange FN-R, N Brilliant Blue FN-R, N Super Black G, BY S8-G, and BR S2-B 60–90% [54][29]
Acinetobacter (ST16.16/164 and Klebsiella (ST16.16/034) Monoazo dye RO 16 and diazo dye RG-19 More than 80% [55][30]
Salinivibrio kushneri HTSP CBB G-250 and CR and safranin More than 80% [42][16]
Pseudomonas sp. (S3, S11 and S12), Klebisiella sp. (S4). and Aeromonas sp. (S2) JR, JB and JGY 45–50% [44][18]
Bacillus odyssey SUK3, Morganella morganii SUK5 and Proteus sps SUK 7 Red HE3B, Reactive Blue 59 97–99% [56][31]
B. circulans NPP1 MR and other dyes 98% [57][32]
Ps. desmolyticum NCIM 2112 DB 6, Red HEB7, and Green HE4B 70, 90% [58][33]
Acinetobacter calcoaceticus MR, MO 90–98% [59][34]
Enterobacter sp. CV–S1 CV   [60][35]
B. subtilis (E1),

Exiguobacterium acetylicum (D1),

Klebsiella terrigena (R2),

S. aureus (A22),

Ps. pseudoalcaligenes (A17), and

Ps. plecoglossicida (A14)		 Whale,

mediblue,

fawn and

mixed dye,		 97.04%, 80.61%, 94.93% and 81.64% [61][36]
Sulfate-reducing bacteria (SRB) Orange II 95% [62][37]
Sterigmatomyces halophilus SSA1 575 RB-5, RB-5 100% [63][38]
Anoxybacillus ayderensis SK3-4 DG 6 100% [64][39]
A.   hydrophila SK 16 AFY MR More than 70 [46][21]
Serratia liquifaciens Azure B 90% [65][40]
Bacillus cereus SKB12 RB-5 88.7% [66][41]
B. cereus

and

Ps. parafulva		 Azo dyes: T-blue, yellow GR, and orange 3R 91.69 and 89.21% [45][19]
B.   circulans BWLI 061 MO 99.22% [67][42]
Bacterial consortium-Bacillus flexus TS8 (BF),

Proteus mirabilis PMS (PM), and

Ps. aeruginosa NCH (PA)		 Indanthrene Blue RS 99% [68][43]
Bacillus pseudomycoides MG 96.8% [19][44]
Citrobacter sp. CR 93% [69][45]
Bacillus subtilis HAU-KK01 CR 92.8% [70][46]
Thiosphaera pantotropha RY 100% [71][47]
Staphylococcus sp. K2204 RBB 100% [72][48]
Staphylococcus sp. Reactive blue 97% [73][49]

3. Mechanism of Bioremediation

The use of biological processes to reduce emissions from atmospheric, aquatic, or terrestrial systems is known as bioremediation. Microorganisms and plants are most often used as biological structures for this purpose. Microorganism-mediated biodegradation is one of the most common bioremediation methods. Microbes may simplify many complex substances to meet their development and energy requirements. Air may or may not be needed for these biodegradation processes. In certain circumstances, the same metabolic pathways that cells utilize for growth and supply of energy are often utilized to simplify the components of pollutants. Microorganisms do not benefit directly in these situations, known as metabolism, but investigators have taken the benefit of this effect and used it for bioremediation. Mineralization, or complete oxidation, results in the production of water and either CO2 or CH4. Incomplete biodegradation can result in the cleaving of the product which is less toxic than the initial pollutant. As a result, bioremediation overcomes the drawbacks of traditional methods by causing physical degradation of specific organic chemicals at a lower rate. As a result, bioremediation has evolved from a nearly unknown technique to one that has been used to clean up a wide variety of toxins over the past two decades [74][50].

References

  1. Yadav, V.K.; Gupta, N.; Kumar, P.; Dashti, M.G.; Tirth, V.; Khan, S.H.; Yadav, K.K.; Islam, S.; Choudhary, N.; Algahtani, A.; et al. Recent Advances in Synthesis and Degradation of Lignin and Lignin Nanoparticles and Their Emerging Applications in Nanotechnology. Materials 2022, 15, 953.
  2. Mason, M.G.; Ball, A.S.; Reeder, B.J.; Silkstone, G.; Nicholls, P.; Wilson, M.T. Extracellular heme peroxidases in actinomycetes: A case of mistaken identity. Appl. Environ. Microbiol. 2001, 67, 4512–4519.
  3. Liu, Y.-Q.; Maulidiany, N.; Zeng, P.; Heo, S. Decolourization of azo, anthraquinone and triphenylmethane dyes using aerobic granules: Acclimatization and long-term stability. Chemosphere 2021, 263, 128312.
  4. Chater, K.F.; Biró, S.; Lee, K.J.; Palmer, T.; Schrempf, H. The complex extracellular biology of Streptomyces: Review article. FEMS Microbiol. Rev. 2010, 34, 171–198.
  5. Fodil, D.; Badis, A.; Jaouadi, B.; Zaraî, N.; Ferradji, F.Z.; Boutoumi, H. Purification and characterization of two extracellular peroxidases from Streptomyces sp. strain AM2, a decolorizing actinomycetes responsible for the biodegradation of natural humic acids. Int. Biodeterior. Biodegrad. 2011, 65, 470–478.
  6. Chequer, F.M.D.; Ferraz, E.R.A.; Cardoso, J.C. Textile Dyes: Dyeing Process and Environmental Impact. In Eco-Friendly Textile Dyeing and Finishing; de Oliveira, G.A.R., Ed.; IntechOpen: Rijeka, Croatia, 2013; Chapter 6.
  7. Blánquez, A.; Rodríguez, J.; Brissos, V.; Mendes, S.; Martins, L.O.; Ball, A.S.; Arias, M.E.; Hernández, M. Decolorization and detoxification of textile dyes using a versatile Streptomyces laccase-natural mediator system. Saudi J. Biol. Sci. 2019, 26, 913–920.
  8. Dong, H.; Guo, T.; Zhang, W.; Ying, H.; Wang, P.; Wang, Y.; Chen, Y. Biochemical characterization of a novel azoreductase from Streptomyces sp.: Application in eco-friendly decolorization of azo dye wastewater. Int. J. Biol. Macromol. 2019, 140, 1037–1046.
  9. Adenan, N.H.; Lim, Y.Y.; Ting, A.S.Y. Removal of triphenylmethane dyes by Streptomyces bacillaris: A study on decolorization, enzymatic reactions and toxicity of treated dye solutions. J. Environ. Manag. 2022, 318, 115520.
  10. Kumar, P.; Gacem, A.; Ahmad, M.T.; Yadav, V.K.; Singh, S.; Yadav, K.K.; Alam, M.M.; Dawane, V.; Piplode, S.; Maurya, P.; et al. Environmental and human health implications of metal(loid)s: Source identification, contamination, toxicity, and sustainable clean-up technologies. Front. Environ. Sci. 2022, 1328.
  11. Chakravarthi, B.; Mathakala, V.; Palempalli, U.M.D. Bioremediation of Textile Azo Dyes by Marine Streptomyces. In Recent Trends in Waste Water Treatment and Water Resource Management; Ghosh, S.K., das Saha, P., Di Francesco, M., Eds.; Springer: Singapore, 2020; pp. 129–142.
  12. Zhou, W.; Zimmermann, W. Decolorization of industrial effluents containing reactive dyes by actinomycetes. FEMS Microbiol. Lett. 1993, 107, 157–161.
  13. Adenan, N.H.; Lim, Y.Y.; Ting, A.S.Y. Identification and optimization of triphenylmethane dyes removal by Streptomyces sp. from forest soil. Sustain. Environ. Res. 2021, 31, 1–15.
  14. Soleimani-Gorgani, A.; Taylor, J.A. Dyeing of nylon with reactive dyes. Part 1. The effect of changes in dye structure on the dyeing of nylon with reactive dyes. Dye. Pigment. 2006, 68, 109–117.
  15. Yadav, V.K.; Choudhary, N.; Ali, D.; Kumar, G.; Gnanamoorthy, G.; Khan, A.U.; Kumar, P.; Hari Kumar, S.; Tizazu, B.Z. Determination of Adsorption of Methylene Blue Dye by Incense Stick Ash Waste and Its Toxicity on RTG-2 Cells. Adsorpt. Sci. Technol. 2022, 2022, 8565151.
  16. John, J.; Dineshram, R.; Hemalatha, K.R.; Dhassiah, M.P.; Gopal, D.; Kumar, A. Bio-Decolorization of Synthetic Dyes by a Halophilic Bacterium Salinivibrio sp. Front. Microbiol. 2020, 11, 594011.
  17. Akter, K.; Zerin, T.; Banik, A. Biodegradation of textile dyes by bacteria isolated from textile industry effluents. Stamford J. Microbiol. 2020, 9, 5–8.
  18. Shete, U.R.; Waghmare, V.M.; Dhande, N.M. Isolation and screening of textile dye decolorizing bacteria from textile industrial effluent. Themat. J. Microbiol. 2019, 3.
  19. Khaled, J.M.; Alyahya, S.A.; Govindan, R.; Chelliah, C.K.; Maruthupandy, M.; Alharbi, N.S.; Kadaikunnan, S.; Issac, R.; Murugan, S.; Li, W.J. Laccase producing bacteria influenced the high decolorization of textile azo dyes with advanced study. Environ. Res. 2022, 207, 112211.
  20. Ji, J.; Kulshreshtha, S.; Kakade, A.; Majeed, S.; Li, X.; Liu, P. Bioaugmentation of membrane bioreactor with Aeromonas hydrophila LZ-MG14 for enhanced malachite green and hexavalent chromium removal in textile wastewater. Int. Biodeterior Biodegrad. 2020, 150, 104939.
  21. Thanavel, M.; Bankole, P.O.; Kadam, S.; Govindwar, S.P.; Sadasivam, S.K. Desulfonation of the textile azo dye Acid Fast Yellow MR by newly isolated Aeromonas hydrophila SK16. Water Resour. Ind. 2019, 22, 100116.
  22. Chen, B.-Y.; Lin, K.-W.; Wang, Y.-M.; Yen, C.-Y. Revealing interactive toxicity of aromatic amines to azo dye decolorizer Aeromonas hydrophila. J. Hazard. Mater. 2009, 166, 187–194.
  23. Jadhav, U.U.; Dawkar, V.v.; Ghodake, G.S.; Govindwar, S.P. Biodegradation of Direct Red 5B, a textile dye by newly isolated Comamonas sp. UVS. J. Hazard. Mater. 2008, 158, 507–516.
  24. Hossen, M.Z.; Hussain, M.E.; Hakim, A.; Islam, K.; Uddin, M.N.; Azad, A.K. Biodegradation of reactive textile dye Novacron Super Black G by free cells of newly isolated Alcaligenes faecalis AZ26 and Bacillus spp obtained from textile effluents. Heliyon 2019, 5, e02068.
  25. Gomare, S.S.; Govindwar, S.P. Brevibacillus laterosporus MTCC 2298: A potential azo dye degrader. J. Appl. Microbiol. 2009, 106, 993–1004.
  26. Fernando, E.; Keshavarz, T.; Kyazze, G. Enhanced bio-decolourisation of acid orange 7 by Shewanella oneidensis through co-metabolism in a microbial fuel cell. Int. Biodeterior. Biodegrad. 2012, 72, 1–9.
  27. Angelova, B.; Avramova, T.; Stefanova, L.; Mutafov, S. Temperature effect on bacterial azo bond reduction kinetics: An Arrhenius plot analysis. Biodegradation 2008, 19, 387–393.
  28. Patil, S.M.; Rane, N.R.; Bankole, P.O.; Krishnaiah, P.; Ahn, Y.; Park, Y.-K.; Yadav, K.K.; Amin, M.A.; Jeon, B.-H. An Assessment of Micro- and Nanoplastics in the Biosphere: A Review of Detection, Monitoring, and Remediation Technology. Chem. Eng. J. 2022, 430, 132913.
  29. Karim, M.E.; Dhar, K.; Hossain, M.T. Decolorization of Textile Reactive Dyes by Bacterial Monoculture and Consortium Screened from Textile Dyeing Effluent. J. Genet. Eng. Biotechnol. 2018, 16, 375–380.
  30. Maurya, P.K.; Ali, S.A.; Alharbi, R.S.; Yadav, K.K.; Alfaisal, F.M.; Ahmad, A.; Ditthakit, P.; Prasad, S.; Jung, Y.-K.; Jeon, B.-H. Impacts of Land Use Change on Water Quality Index in the Upper Ganges River near Haridwar, Uttarakhand: A GIS-Based Analysis. Water 2021, 13, 3572.
  31. Patil, P.S.; Phugare, S.S.; Jadhav, S.B.; Jadhav, J.P. Communal action of microbial cultures for Red HE3B degradation. J. Hazard. Mater. 2010, 181, 263–270.
  32. Patil, N.P.; Bholay, A.D.; Kapadnis, B.P.; Gaikwad, V.B. Biodegradation of model azo dye methyl red and other textile dyes by isolate Bacillus circulans npp1. J. Pure Appl. Microbiol. 2016, 10, 2793–2800.
  33. Kalme, S.; Jadhav, S.; Jadhav, M.; Govindwar, S. Textile dye degrading laccase from Pseudomonas desmolyticum NCIM 2112. Enzyme Microb. Technol. 2009, 44, 65–71.
  34. Ghodake, G.; Jadhav, U.; Tamboli, D.; Kagalkar, A.; Govindwar, S. Decolorization of Textile Dyes and Degradation of Mono-Azo Dye Amaranth by Acinetobacter calcoaceticus NCIM 2890. Indian J. Microbiol. 2011, 51, 501–508.
  35. Ahn, H.J.; Ahn, Y.; Kurade, M.B.; Patil, S.M.; Ha, G.S.; Bankole, P.O.; Khan, M.A.; Chang, S.W.; Abdellattif, M.H.; Yadav, K.K.; et al. The comprehensive effects of aluminum oxide nanoparticles on the physiology of freshwater microalga Scenedesmus obliquus and it’s phycoremediation performance for the removal of sulfacetamide. Environ. Res. 2022, 215, 114314.
  36. Buthelezi, S.P.; Olaniran, A.O.; Pillay, B. Textile dye removal from wastewater effluents using bioflocculants produced by indigenous bacterial isolates. Molecules 2012, 17, 14260–14274.
  37. Aloius Togo, C.; Clifford Zvandada Mutambanengwe, C.; George Whiteley, C. Decolourisation and degradation of textile dyes using a sulphate reducing bacteria (SRB)-biodigester microflora co-culture. Afr. J. Biotechnol. 2008, 7, 114–121.
  38. Al-Tohamy, R.; Sun, J.; Fareed, M.F.; Kenawy, E.R.; Ali, S.S. Ecofriendly biodegradation of Reactive Black 5 by newly isolated Sterigmatomyces halophilus SSA1575, valued for textile azo dye wastewater processing and detoxification. Sci. Rep. 2020, 10, 12370.
  39. Choudhary, N.; Yadav, V.K.; Yadav, K.K.; Almohana, A.I.; Almojil, S.F.; Gnanamoorthy, G.; Kim, D.-H.; Islam, S.; Kumar, P.; Jeon, B.-H. Application of Green Synthesized MMT/Ag Nanocomposite for Removal of Methylene Blue from Aqueous Solution. Water 2021, 13, 3206.
  40. Haq, I.; Raj, A.; Markandeya. Biodegradation of Azure-B dye by Serratia liquefaciens and its validation by phytotoxicity, genotoxicity and cytotoxicity studies. Chemosphere 2018, 196, 58–68.
  41. Sheela, T.; Sadasivam, S.K. Dye degradation potential and its degradative enzymes synthesis of bacillus cereus skb12 isolated from a textile industrial effluent. J. Appl. Biol. Biotechnol. 2020, 8, 42–46.
  42. Liu, W.; Liu, C.; Liu, L.; You, Y.; Jiang, J.; Zhou, Z.; Dong, Z. Simultaneous decolorization of sulfonated azo dyes and reduction of hexavalent chromium under high salt condition by a newly isolated salt-tolerant strain Bacillus circulans BWL1061. Ecotoxicol. Environ. Saf. 2017, 141, 9–16.
  43. Mohanty, S.S.; Kumar, A. Enhanced degradation of anthraquinone dyes by microbial monoculture and developed consortium through the production of specific enzymes. Sci. Rep. 2021, 11, 7678.
  44. Kumar, N.; Sinha, S.; Mehrotra, T.; Singh, R.; Tandon, S.; Thakur, I.S. Biodecolorization of azo dye Acid Black 24 by Bacillus pseudomycoides: Process optimization using Box Behnken design model and toxicity assessment. Bioresour. Technol. Rep. 2019, 8, 100311.
  45. Schmidt, C.; Berghahn, E.; Ilha, V.; Granada, C.E. Biodegradation potential of Citrobacter cultures for the removal of amaranth and congo red azo dyes. Int. J. Environ. Sci. Technol. 2019, 16, 6863–6872.
  46. Sarim, K.M.; Kukreja, K.; Shah, I.; Choudhary, C.K. Biosorption of direct textile dye Congo red by Bacillus subtilis HAU-KK01. Bioremediat. J. 2019, 23, 185–195.
  47. Garg, N.; Garg, A.; Mukherji, S. Eco-friendly decolorization and degradation of reactive yellow 145 textile dye by Pseudomonas aeruginosa and Thiosphaera pantotropha. J. Environ. Manag. 2020, 263, 110383.
  48. Velayutham, K.; Madhava, A.K.; Pushparaj, M.; Thanarasu, A.; Devaraj, T.; Periyasamy, K.; Subramanian, S. Biodegradation of Remazol Brilliant Blue R using isolated bacterial culture (Staphylococcus sp. K2204). Environ. Technol. 2018, 39, 2900–2907.
  49. Holkar, C.R.; Arora, H.; Halder, D.; Pinjari, D.V. Biodegradation of reactive blue 19 with simultaneous electricity generation by the newly isolated electrogenic Klebsiella sp. C NCIM 5546 bacterium in a microbial fuel cell. Int. Biodeterior. Biodegrad. 2018, 133, 194–201.
  50. Hansda, A.; Kumar, V.; Anshumali. A comparative review towards potential of microbial cells for heavy metal removal with emphasis on biosorption and bioaccumulation. World J. Microbiol. Biotechnol. 2016, 32, 170.
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