Batch Mode Studies Research Articles

Adsorption and photocatalytic degradation of 2,4-dicholrophenol using surgical mask derived SMAC-Fe2O3 composite; adsorption isotherms, kinetics, thermodynamics.

Hybrid material of surgical mask activated carbon (SMAC) and Fe2O3 (SMAC-Fe2O3) composite was prepared by simple co-precipitation method and used as potential material for the remediation of 2,4-dicholrophenol (2,4-DCP). The XRD patterns exhibited the presence of SMAC and Fe2O3, FTIR spectrum showed the FeO-carbon stretching at the wavenumber from 400 to 550cm-1. UV-Vis DRS results showed the band gap was 1.97eV and 2.05eV for SMAC-Fe2O3 and Fe2O3, respectively. The SEM images revealed that the Fe2O3 doped onto the fiber morphology of SMAC. The outcomes of the BET examination exhibited a surface area of 195 m2/g and a pore volume of 0.2062 cm3/g for the SMAC/Fe2O3 composite. The batch mode study shows the maximum adsorption and photocatalytic degradation efficacies which were 97% and 78%, respectively. The experimental data was studied with both linear and nonlinear adsorption isotherm and kinetics models. The nonlinear Langmuir isotherm and pseudo-second-order kinetics (PSOK) models have well fit compared with other models. The Langmuir maximum adsorption capacity (qmax) was found 161.60mg/g. Thermodynamic analysis shows that the 2,4-DCP adsorption onto SMAC-Fe2O3 was a spontaneous and exothermic process. The PSOK assumes that the adsorption process was chemisorption. The photocatalytic degradation rate constant of 2,4-DCP was calculated using pseudo-first-order kinetics (PFOK) and the rate constant for SMAC-Fe2O3 and Fe2O3 were 0.859 × 10-2min-1 and 0.616 × 10-2min-1, correspondingly. In addition, the obtained composite exhibited good reusability after a few cycles. These results confirmed that SMAC-Fe2O3 composite is an effective adsorbent and photocatalyst for removing 2,4-DCP pollutants.

Activated rice husk biochar for azo dye removal: batch adsorption, kinetics and thermodynamic studies

<p>The study aimed to analyze the adsorption behaviour of an activated rice husk biochar adsorbent in batch mode to expunge azo dye concentrations depletion from liquid solvents. The biochar adsorbent was formulated using different chemical synthesis processes, and its surface region was assessed using Nitrogen retention. The existence of the particular azo dyes was verified through SEM and EDX examinations. Additionally, XRD analysis was conducted to examine the intensity and crystalline structure of the activated biochar adsorbent. A batch mode study was conducted to ascertain the ideal adsorption parameters, including pH, contact time, biochar dose, and azo dye concentration. The adsorption kinetic studies supported the notion of a favourable adsorption interaction occurring through the mutual influence of the adsorbed matter and the adsorbing substrate. Most isotherm studies were well-fitted with regression values of isotherm models, indicating an adsorption process with non-uniform monolayer formation. Thermodynamic investigations validated that the binding forces between the adsorptive and the adsorbing phase are endothermic, and a significant amount of spent adsorbent was successfully recovered using a strong hydrochloric acid desorption process.</p>

Recycling of catering waste for sequential production of biohydrogen and biomethane; pre-treatments, batch, and continuous mode studies

Dark fermentation has emerged as a sustainable bio-based economy for bio-fuels production in accord with “carbon neutrality”. Herein, catering waste was collected, pre-treated with a series of multilevel (acidic, alkaline, Triton X100, ultrasonication, and microwave radiation) pathways, and employed as substrates to inspect their characteristics on two-stage mesophilic biohydrogen/biomethane production process through batch assays under initial pH of 6.5, and 7.5, respectively. The findings revealed that the optimized pre-treated catering waste (CW) with Triton X-100 recorded the highest biohydrogen, and biomethane production yield of 5.9 mL/g VS added (BHP of 368.5 mL), and 17.7 ± 26.8 mL/g VS (BMP 1108.5 mL), at 37 °C, respectively. Overall, the kinetic data was strongly matched with the Gompertz equation (R2 = 0.92–0.99). Afterward, the pre-treated Triton X-100-CW was introduced into a second series of continuous experiments (continuously stirred tank reactors) for sequential production of biohydrogen/ biomethane. An average yield of biohydrogen and biomethane production of 22.24 ± 2.29 mL/g VS, and 98.7 ± 10.4 mL/g VS was accomplished at hydraulic retention time (HRT), and organic loading rate (OLR) of 1.0 day, 91.5 gCOD/L.day and 10.0 days, 7.2 gCOD/L.day, respectively. Economically, the configured system displays a total energy yield of 1.634 KWh/KgVS, and the inspected 1600 kg CW produces about 2614.41 KW/day. As such, the present work broadens a salience pattern for scalable upcycling of CW organic constituent stream into biohydrogen/biomethane for potential applications in the energy sector.

Sustainable functionalized smectitic clay-based nano hydrated zirconium oxides for enhanced levofloxacin sorption from aqueous medium

In this study, the functionalized smectitic clay (SC)-based nanoscale hydrated zirconium oxide (ZrO-SC) was successfully synthesized and utilized for the adsorptive removal of levofloxacin (LVN) from an aqueous medium. The synthesized ZrO-SC and its precursors (SC and hydrated zirconium oxide (ZrO(OH)2)) were extensively characterized using various analytical methods to get insight into their physicochemical properties. The results of stability investigation confirmed that ZrO-SC composite is chemically stable in strongly acidic medium. The surface measurements revealed that ZrO impregnation to SC resulted in an increased surface area (six-fold higher than SC). The maximum sorption capacity of ZrO-SC for LVN was 356.98 and 68.87 mg g−1 during batch and continuous flow mode studies, respectively. The mechanistic studies of LVN sorption onto ZrO-SC revealed that various sorption mechanisms, such as interlayer complexation, π-π interaction, electrostatic interaction, and surface complexation were involved. The kinetic studies of ZrO-SC in the continuous-flow mode indicated the better applicability of Thomas model. However, the good fitting of Clark model suggested the multi-layer sorption of LVN. The cost estimation of the studied sorbents was also assessed. The obtained results indicate that ZrO-SC is capable of removing LVN and other emergent pollutants from water at a reasonable cost.

Applicability of new sustainable and efficient green metal-based nanoparticles for removal of Cr(VI): Adsorption anti-microbial, and DFT studies

Artemisia absinthium leaves were utilized as a reducing agent for green synthesis of Zinc oxide nanoparticles (particle size 17 nm). Synthesized green-ZnO (g-ZnO) were characterized by SEM/EDX, FTIR, XRD, UV, and BET analyses and then further used as an adsorbent to remove Cr(VI) ions from simulated wastewater. Optimal pH, temperature and adsorbent dosage were determined through batch mode studies. High removal efficiency and adsorption capacity were observed at pH 4, 0.25 g L−1 dosage, and 25 mg L−1 concentration of Cr(VI). Experimental data were modelled with different adsorption kinetics (Elovich model, PFO, PSO, IDP model) and isotherms (Langmuir, Freundlich, and Temkin), and it was found the adsorption process was well fitted to Langmuir with an R2 value greater than>0.99. Computational calculation showed that the g-ZnO nanoparticles became ∼14 times more dynamic with delocalized surface states making them a relevant platform to adsorb Cr with greater work function compatibility supporting the experimental findings. The Qmax adsorption capacity of g-ZnO was 315.46 mg g−1 from Langmuir calculations. Thermodynamic calculations reveal that the Cr (VI) adsorption process was spontaneous and endothermic, with a positive ΔS value representing the disorder at the solid-solution interface during the adsorption. In addition, the present study has demonstrated that these g-ZnO nanoparticles show strong antibacterial activities against P. aeruginosa (MTCC 1688) and E. coli (MTCC 1687). Also, the novel g-ZnO adsorbent capacity to remove Cr(VI) from simulated water revealed that it could be reused at least six times with higher removal rates during regeneration experiments. The results obtained from adsorption and antimicrobial activities suggest that g-ZnO nanoparticles could be used effectively in real-time wastewater and agricultural safety applications.

Application of Synthesized Vanadium–Titanium Oxide Nanocomposite to Eliminate Rhodamine-B Dye from Aqueous Medium

In this study, a V@TiO2 nanocomposite is examined for its ability to eliminate carcinogenic Rhodamine (Rh-B) dye from an aqueous medium. A simple ultrasonic method was used to produce the nanosorbent. In addition, V@TiO2 was characterized using various techniques, including XRD, HRTEM, XPS, and FTIR. Batch mode studies were used to study the removal of Rh-B dye. In the presence of pH 9, the V@TiO2 nanocomposite was able to remove Rh-B dye to its maximum extent. A correlation regression of 0.95 indicated that the Langmuir model was a better fit for dye adsorption. Moreover, the maximum adsorption capacity of the V@TiO2 nanocomposite was determined to be 158.8 mg/g. According to the thermodynamic parameters, dye adsorption followed a pseudo-first-order model. Based on the results of the study, a V@TiO2 nanocomposite can be reused for dye removal using ethanol.

Use of potential bacterial strains to remove Hexavalent Chromium from an aqueous medium and the Periyar River sediments

Chromium is one of the most abundant metals in the earth's crust mined as chromites. Industries that widely use compounds containing chromium as Cr(III) in the tanning process generally release effluents with high chromium levels into natural water resources, frequently without appropriate effluent treatment. Though physical and chemical methods of chromium removal are adopted, the processes are expensive, use a lot of energy and generate secondary toxic waste. The removal of chromium by biological resources on the other hand is more environmentally friendly, less expensive, and lacks the release of secondary pollutants. The present study is aimed towards the assessment of the Cr(VI) reduction capability of two bacterial strains, Alcaligenes sp. (S11) and Listeria sp. (S18) used as a consortium. These bacterial strains were isolated from the Periyar river of Kerala, India. Batch mode studies were carried out by live bacterial cells and an integrated study was carried out to test the bacterial strains on chromium-contaminated water and sediments through bioreactor and column study respectively under optimized conditions. The phytotoxicity of the treated water was studied on black gram. In the bioreactor study, the maximum Cr(VI) reduction capacity of bacterial consortium (S11 and S18) was found to be 97%. The successive experiment for the toxicity of treated water on the black gram indicated that there was no toxicity in the growth parameters of the plant.

Mathematical modelling for biomitigation of lead from waste water using packed-bed biofilm reactor

A mathematical model was developed from first principle to predict the concentration distribution in the axial direction in a packed bed biofilm reactor used for the removal of lead from wastewater by bioremediation. The biocatalyst was prepared by immobilizing Acinetobacter sp. 158 (isolated in-house from a native source) on a sintered sticky Earthen sphere using an attached growth technique. To evaluate the intrinsic kineticparameters necessary for the simulation, batch mode studies of the same system were carried out, and the cell growth dynamics were established. It was observed that within the concentration of lead from 0.01 kg m−3 to 0.04 kg m−3 the system followed the Monods substrate uninhibited model equation. The first order differential equation obtained through thesteady-state mass balance in the axial direction of the packed bed contained no adjustable parameters, and the equation was solved analytically. Within the lead concentration range 0.01 kg m−3−0.04 kg m−3 and flow velocity 1.43 m h−1 −5.73 m h−1 experimental data shows best alignment with the simulated values. The close fit of such experimental data with the simulated values indeed clearly indicates the validity of the proposed deterministic model equation.

Excellent Adsorption of Dyes via MgTiO3@g-C3N4 Nanohybrid: Construction, Description and Adsorption Mechanism

This report investigates the elimination of hazardous Rhodamine B dye (RhB) from an aqueous medium utilizing MgTiO3@g-C3N4 nanohybrids manufactured using a facile method. The nanohybrid MgTiO3@g-C3N4 was generated using an ultrasonic approach in the alcoholic solvent. Various techniques, including HRTEM, EDX, XRD, BET, and FTIR, were employed to describe the fabricated MgTiO3@g-C3N4 nanohybrids. RhB elimination was investigated utilizing batch mode studies, and the maximum removal was attained at pH 7.0. The RhB adsorption process is more consistent with the Langmuir isotherm model. The highest adsorption capacity of MgTiO3@g-C3N4 nanohybrids for RhB was determined to be 232 mg/g. The dye adsorption followed a pseudo-second-order model, and the parameters calculated indicated that the kinetic adsorption process was spontaneous. Using ethanol and water, the reusability of the nanomaterial was investigated, and based on the results; it can be concluded that the MgTiO3@g-C3N4 nanohybrids are easily regenerated for dye removal. The removal mechanism for the removal of RhB dye into MgTiO3@g-C3N4 nanohybrids was also investigated.

Hydrothermally synthesized carboxylic acid functionalized multiwalled carbon nanotubes grafted MoS2 based hybrid composites: Efficient uranium(VI) scavenging sorbents in columns, fabric and matrix membrane systems

In the present study, pure MoS2 and its composites grafted with multiwalled carbon nanotubes (MoS2-MWCNT: 10–40 mg) and carboxylic acid functionalized multiwalled carbon nanotubes (MoS2-MWCNT-COOH; 10–40 mg) were synthesized using a facile hydrothermal method. MoS2 (MS) and its two composites each containing 40 mg of MWCNT (MS-C4) and MWCNT-COOH (MS-CA4) were subjected to structural, chemical and surface characterization using RAMAN, XPS, FT-IR HRTEM, FESEM, EDX and BET studies. In order to establish their adsorptive behaviour for remediation of U(VI), the systematic batch mode studies were conducted and adsorption data were analysed using different isotherm, kinetic and thermodynamic models. Langmuir maximum adsorption capacity (mg/g) of three MoS2 sorbents for U(VI) follows the order as: MS-CA4 (233.38) > MS-C4 (164.85) > MS (53.77) with thermodynamic parameters describing spontaneous and endothermic nature of adsorption. The electrostatic interactions and monolayer chemisorption via coordinate complex formation are mainly responsible for U(VI) extraction from water. These findings allow to expand the promising application of MS-CA4 in environmental remediation as fillers and packing materials in fabric/PSF mixed membranes and column systems, respectively.

Protonated polyaniline and its derivatives as potential adsorbents for simultaneous reclamation of textile dyes and oil/water separation

Potential adsorbents hold vital importance for the removal of conventional and hazardous micropollutants from waste water. The present study reports the synthesis and characterization of polyaniline (PANI) and its two derivatives by selecting pre-substituted monomers at ring (poly 4-amino phenol; PpAP) and nitrogen atom (poly N-methyl aniline; PNMA) prior to polymerization. The synthesized polymers were characterized by FTIR, XRD, TGA, SEM, TEM, BET and UV–Vis techniques. These polymers were exploited simultaneously for the removal of textile dyes and o il/water (O/W) separation. Initially, the adsorption potential of adsorbents towards removal of methylene blue (MB) dye was investigated in batch mode study by diversifying the effective factors like contact time, initial concentration of MB dye, amount of adsorbent and pH. The maximum dye adsorption capacity was found to be 320, 311, 299 mg/g for PNMA, PpAP and PANI respectively. These results were further verified by the computational studies. Thermodynamics of adsorption studies revealed that Langmiur adsorption isotherm is best fitted whereas kinetic studies were best described by pseudo second order model. The polymers were regenerated without any significant reduction in adsorption capacity by washing simply with water and ethanol. On the other hand, FTIR analysis before and after adsorption of MB explains that a variety of interactions are involved in the adsorption of MB. Moreover, the synthesized polymers were also applied for the separation of non-polar solvents from water (oil/water separation). Interestingly, PNMA, PpAP and PANI have shown promising results towards O/W separation studies obtaining separation efficiency values of 98%, 97% and 96% respectively. Good separation efficiency of prepared polymers is attainable due to hydrophilic nature of polyanilines. Overall, this study explores the potentiality of conducting polymer adsorbents for textile waste water treatment as well as for O/W separation.

Facile Fabrication of Quaternary Ammonium Salt Modified Cotton Linter by Radiation Grafting and its Effective Removal of Methyl Orange: Batch and Dynamic Flow Mode Studies

Facile Fabrication of Quaternary Ammonium Salt Modified Cotton Linter by Radiation Grafting and its Effective Removal of Methyl Orange: Batch and Dynamic Flow Mode Studies

Magnetic nano carbon balls - Synthesis and adsorption studies

Madhuca longifolia oil used as precursor oil for the synthesis of nano sized carbon balls with a size of 50 to 100 nm. An indigenously designed reactor assembly is used for this synthesis. Low temperature direct pyrolysis method is employed with the help of multi-metal catalyst derived from Alternanthera sessilis stem ash. The synthesized carbon balls have a bulk density of 0.124 g/mL and BET surface area of 805.87 m2/g. In-order to ensure the effective recovery of NCB, it is immobilized with a magnetic nano particle Fe3O4 and used for the adsorption studies of Acid Green 25 dye from aqueous solution under batch mode. Batch mode studies also proved the endothermic nature and physisorption mechanisms. The maximum Langmuir monolayer capacity of 243.90 mg/g has been achieved at a temperature of 45°C.

Functionalised carbon from Musa Balbisiana stems - a byproduct of edible alkali preparation and a suitable adsorbent for fluoride and arsenic from contaminated water

A popular traditional food additive amongst the Assamese people of North East India is Kol-Khar or banana peel alkali. The preparation of this edible alkali is carried out by aqueous extraction of ashes obtained from slow burning of hard sun dried banana stems and peels of Musa Balbisiana. The alkali is extracted from the ashes by water washing. The carbon fraction obtained in the process remains as a byproduct. This carbon due to exposure to high alkalinity during alkali extraction undergoes a base mediated surface functionalisation. From FESEM images, some holes and cave type openings are found on the surface of this carbon. From EDX spectra the chemical composition of the carbon was obtained. The number of acidic and basic sites so formed could be determined by Boehm titration. This functionalized waste bio carbon was used as an adsorbent for fluoride and arsenic from ground water. Effect of different parameters like adsorbent dose, contact time, temperature and pH of adsorbate on defluoridation capacity of the material was studied in the present work. The adsorption isotherm and adsorption kinetics were also investigated. From batch mode study 73 % removal of fluoride and 79.8 % removal of arsenic are obtained from each 5 mg/L spiked fluoride and arsenic solution.

ADSORPTIVE REMOVAL OF BASIC ORANGE 21 DYE BY AN ADSORBENT PREPARED FROM Adenanthera paronina L SEEDS

Adsorption using activated carbon is found to be a promising technology for the removal of dyes present in wastewater. The carbon prepared from Adenanthera paronina L seeds (APAC5) through chemical impregnation, microwave carbonization, and finally muffle furnace activation found to have a 948 m2 /g surface area. The microwave heating generates highly branched activated carbon with fewer surface functional groups. The batch mode adsorption of Basic Orange 21 (BO21) dye onto APAC5 is studied. The maximum quantity of BO21 adsorbed is 49.17 mg/g under batch mode study for 50 mg/lof initial BO21 concentration. The nonlinear form of mathematical expression describes the kinetic and isotherm models better under batch mode analysis.

Development of Eco-friendly Adsorbent Pellets from Low Fire Clay and Potato Starch for Potential Use in Methylene Blue Removal in Aquaculture

Mesoporous clay-starch ceramic pellets have been prepared using silica-rich low fire clay and potato starch as a pore-forming agent. The ceramic pellets prepared using 30% starch, showed the highest porosity and lowest compressive strength among all the different pellets. Batch mode studies using the pellets showed higher methylene blue adsorption capacity with an increase in time and increased initial dye concentration. The adsorption capacity was found to decrease with increasing pellet dose, while pH had a negligible effect on methylene blue removal which makes them a suitable adsorbent in both acidic and basic mediums. Adsorption isotherm analysis of the process was followed by the Langmuir adsorption isotherm whereas the kinetics analysis fitted well with the pseudo-second-order kinetic model. A low-cost, simple device was made from a stainless-steel wire mesh with mesoporous ceramic pellets enclosed in it, which can easily be dipped and taken out of an aquarium and can remove methylene blue from water.

Optimization, Kinetic and Thermodynamic Studies on Biosorption and Bio-reduction of Chromium Hexavalent by Myrtus communis Leaves

Aims: The efficiency of Myrtus communis leaves to eliminate Cr(VI) from aqueous solutions has been investigated. Background: Optimization, kinetic and thermodynamic studies on bio-sorption and bioreduction of Cr(VI) by Myrtus communis leaves. Objective: To eliminate Cr(VI) from aqueous solutions. Methods: Batch mode studies, kinetic and thermodynamic studies. Result: The maximum bio-removal was obtained at an initial Cr(VI) concentration of 100 mg/L, biomass of 0.150 g, pH 2, and a temperature of 25°C. The modeling study has shown that the bio-removal kinetics obeyed the pseudo-second-order model along with an R2= 0.9947. Conclusion: A total removal of Cr(VI) after 60 minutes has been noticed. Also, the kinetic studies have indicated that the bioreduction of Cr (VI) to Cr (III) coupled with biosorption was produced on biomass sites. Based on the determined thermodynamic parameters (Gibbs energy (ΔG0), enthalpy (ΔH0), and entropy (ΔS0)), the bio-removal process was found to be endothermic and spontaneous in nature. Other: Myrtus communis leaves powder was characterized by spectroscopy (FTIR) and scanning electron microscope analysis (SEM-EDX).

Isolation of Fluoride Resistant Microorganisms from Fluoride Contaminated Ground Water Samples of Nalgonda District and their role in Bioremediation

Consuming of water contaminated with high fluoride concentration for a very long time causes health problems such as, dental and skeletal fluorosis. Hence, defluoridation of water is essentially required before consumption, when water is contaminated with high fluoride concentration. In this present study, research was focussed on to isolate bacteria which are showing fluoride resistantance from samples of ground water from high fluoride affected regions of Nalgonda. After analysis of 10 samples from different areas of Nalgonda district, two samples of ground water from Narketpally and Nampally showed the high fluoride concentrations of 9.18 ppm and 7.55 ppm respectively. Hence, in the present study, Narketpally ground water sample with highest ppm was considered to isolate fluoride resistant bacteria. A total of eight fluoride resistant organisms were purified from this sample with varying fluoride resistance on Luria Bertani agar with varying fluoride concentraion from 25mg/L to 600mg/L at pH 7. Among the eight strains isolated, three strains MB1, F and G were showing high fluoride resistance (up to 500mg/L), which were further explored for their role in bioremediation of fluoride. In batch mode study, MB1 strain showed high fluoride degradation of 68%, whereas, F and G strains showed 57% and 44%fluoride removal, respectively, when fluoride concentration was present at 20 mgL-1 at 30 °C temperature and pH 7, with dextrose (10 g) utilised as source of carbon per 100 mL media after incubation of 8 days. Results indicate that, MB1 possibly a potential fluoride resistant bacterium with high fluoride bioremediation capacity.

Removal of Cibacron Blue P-3R (RB 49) dye from aqueous solution using chemo-physically activated biochar from Agave fiber waste

This paper presents the use of Agave leaves for the removal of an anionic dye Cibacron Blue P 3R (CB) from aqueous solution. The work reports the preparation of activated material (ALa) by impregnation with H3PO4 and carbon fibers (ALc) by pyrolysis at 800°C, from Agave leaves (AL). The materials were characterized by potentiometric titrations, scanning electron microscope, thermogravimetric analysis, and Fourier transform infrared spectroscopy. Initial pH, contact time, and initial dye concentration were evaluated in batch mode studies. Statistical analysis root-mean-square error (RMSE) was compared in the Langmuir, Freundlich, and kinetic equations. The kinetic investigation was fitted with pseudo-second-order model for both native (AL), calcined (ALc) and activated (ALa) adsorbents with R2 values higher than 0.99. Processes were well described with Langmuir isotherm model at the dye concentration range of 10–250 mg/L for all adsorbents. AL, ALa, and ALc samples exhibited, at pH=2.2, high maximum adsorption capacity of 20.83, 50.76, and 102.04 mg/g respectively. The experimental data are fitted well by the Langmuir in case of native (AL) and activated (ALa) adsorbents, where a high correlation coefficients (R2) and a low root-mean-square errors (RMSE). For the adsorption of CB dye on the calcined material (ALc), the Freundlich mode perfectly describes the adsorption process with a very low-root-mean-squares error (RMSE) = 0.62.

Bi-model cationic dye adsorption by native and surface-modified Trichoderma asperellum BPL MBT1 biomass: From fermentation waste to value-added biosorbent

In this study, we aimed to assess the possible reusability of native and surface-modified waste biomass of a novel ascomycetes fungi Trichoderma asperellum BPL MBT1 for the adsorption of triphenylmethane dyes. Spent biomass obtained from fermentation medium has been applied in the uptake of model cationic dyes viz., crystal violet and malachite green. Optimization of experimental parameters by batch mode studies revealed that dye adsorption is influenced by medium pH time, initial concentration of dyes, and adsorbent dosage. It was observed that pH 10 was optimum for cationic dye adsorption. Further, the adsorption process obeyed the bi-model (Langmuir–Freundlich model) isotherm and adhered to pseudo-second-order kinetics. The involvement of ion exchange as the dominant mechanism of dye adsorption was indicated by the mean free energy obtained from Dubinin–Radushkevich isotherm. Cellular morphology and the involved functional groups were studied by scanning electron microscopy and Fourier transform infrared spectroscopy that revealed the presence of carbon and oxygen containing groups on the surface. Maximum desorption efficiency was achieved using a 0.1 M solution of HCl and the stability of the biosorbent was confirmed through reusability analysis. Our results confirm the applicability of both native and surface-modified T. asperellum BPL MBT1 biomass as a potential biosorbent for the sustainable wastewater treatment and safe dye disposal.