Synthesis, characterization, and application of oxidant-modified biochar prepared from sawdust for sequestration of basic fuchsin: isotherm, kinetics, and toxicity studies

Varadharaj, Vishnu Priyan; Ramesh, Ghurupreya; Kumar, Ajit; Jeyabalan, Jothika; Narayanasamy, Selvaraju

doi:10.1007/s13399-023-04210-z

Cited by 14 publications

(1 citation statement)

References 37 publications

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“…Microplastics, organic dyes, pesticides, heavy metals, and hydrocarbons are all major environmental contaminants that cause severe effects on all living forms [24]. Amidst the previous contaminants, dyes occupied high priority as they are involved in textile industries, which contribute up to 15% of wastewater [25], and it was reported that about 80% of textile wastewater containing dyes enters our water stream sources [26]. Dyes discharged on the waterbodies have an inconvenient environmental impact; creatures and people also exhibit signs of cell cytotoxicity, genotoxicity, and environmental ecotoxicity [27].…”

Section: Introductionmentioning

confidence: 99%

Kinetic studies on optimized extracellular laccase from Trichoderma harzianum PP389612 and its capabilities for azo dye removal

Abd El-latif,

Zohri,

El-Aref

et al. 2024

Microb Cell Fact

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Background Azo dyes represent a common textile dye preferred for its high stability on fabrics in various harsh conditions. Although these dyes pose high-risk levels for all biological forms, fungal laccase is known as a green catalyst for its ability to oxidize numerous dyes. Methods Trichoderma isolates were identified and tested for laccase production. Laccase production was optimized using Plackett–Burman Design. Laccase molecular weight and the kinetic properties of the enzyme, including Km and Vmax, pH, temperature, and ionic strength, were detected. Azo dye removal efficiency by laccase enzyme was detected for Congo red, methylene blue, and methyl orange. Results Eight out of nine Trichoderma isolates were laccase producers. Laccase production efficiency was optimized by the superior strain T. harzianum PP389612, increasing production from 1.6 to 2.89 U/ml. In SDS-PAGE, purified laccases appear as a single protein band with a molecular weight of 41.00 kDa. Km and Vmax values were 146.12 μmol guaiacol and 3.82 μmol guaiacol/min. Its activity was stable in the pH range of 5–7, with an optimum temperature range of 40 to 50 °C, optimum ionic strength of 50 mM NaCl, and thermostability properties up to 90 °C. The decolorization efficiency of laccase was increased by increasing the time and reached its maximum after 72 h. The highest efficiency was achieved in Congo red decolorization, which reached 99% after 72 h, followed by methylene blue at 72%, while methyl orange decolorization efficiency was 68.5%. Conclusion Trichoderma laccase can be used as an effective natural bio-agent for dye removal because it is stable and removes colors very well.

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Section: Introductionmentioning

confidence: 99%

Kinetic studies on optimized extracellular laccase from Trichoderma harzianum PP389612 and its capabilities for azo dye removal

Abd El-latif,

Zohri,

El-Aref

et al. 2024

Microb Cell Fact

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Efficacy Assessment of Molecularly Imprinted Polymer Incorporated with Starch and Macadamia Capped Silver Nanoparticles for the Removal of Multi‐Class Pharmaceuticals in Wastewater

Nxumalo,

Mahlambi,

Mahlambi

2024

ChemistrySelect

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The presence of pharmaceuticals in water bodies has been reported to be mainly due to their incomplete removal by the conventional wastewater treatment processes, resulting to their release into the aquatic environment where they thratens to human health and aquatic life. Therefore, it is important to remove these pollutants from the aquatic environment using affordable highly efficient materials. The goal of this study was to incorporate silver nanoparticles (AgNPs) into MIPs for selective removal of sulfamethoxazole, nevirapine, and ibuprofen in wastewater. The AgNPs were synthesized using starch (St) and macadamia (MCD) as both reducing and stabilizing agents. Thermogravimetric analysis showed high stability for the St/MCD‐nanoMIPs. The ANOVA analysis revealed that the parameters affecting adsorption of St/MCD‐nanoMIPs have a significant difference (p<0.05). The St/MCD‐AgNPs experimental data fitted to both Langmuir and Freundlich adsorption isotherms, however, the non‐linear Langmuir isotherm model yielded a better fit based on the higher R2 value (0.999). The non‐linear Freundlich model best fitted for the St/MCD‐nanoMIPs. The linear pseudo‐second order model shown best fit for St/MCD‐nanoMIPs, the thermodynamic results revealed that the adsorption process was spontaneous and endothermic. The St/MCD‐nanoMIPs showed improved qualities and were highly selective (>70 %) and effective in removing the selected pharmaceuticals from wastewater.

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Valorisation of Agricultural Waste into a Low-Cost Adsorbent: Perspective of Reutilization

V.,

Sathasivam,

Kumar

et al. 2024

Agricultural Waste to Value-Added Products

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Synthesis, characterization, and application of oxidant-modified biochar prepared from sawdust for sequestration of basic fuchsin: isotherm, kinetics, and toxicity studies

Cited by 14 publications

References 37 publications

Kinetic studies on optimized extracellular laccase from Trichoderma harzianum PP389612 and its capabilities for azo dye removal

Kinetic studies on optimized extracellular laccase from Trichoderma harzianum PP389612 and its capabilities for azo dye removal

Efficacy Assessment of Molecularly Imprinted Polymer Incorporated with Starch and Macadamia Capped Silver Nanoparticles for the Removal of Multi‐Class Pharmaceuticals in Wastewater

Valorisation of Agricultural Waste into a Low-Cost Adsorbent: Perspective of Reutilization

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