Environmental Remediation Applications Research Articles

Removal of crocein orange G from water solutions by trimetallic nanoparticles [Co/Cu/M (M=Ni, Zn)] prepared by chemical reduction method

Co-Cu-Ni and Co-Cu-Zn trimetallic nanoparticles (NPs) were prepared by chemical reduction method which were then used as adsorbent to remove Crocein Orange G dye from solution. The elemental composition of the fabricated NPs was determined by EDX analysis, surface morphology was assessed by SEM, and its crystalline nature was confirmed by XRD analysis. The functional groups on nanoparticles were confirmed by FT-IR analysis. The optimum dosage was found to be 0.01 g. Langmuir model as well as linear pseudo 2nd order kinetics models best explained the obtained data. The maximum adsorption capabilities were found to be around 497.618 mg/g and 683.093 mg/g, respectively for Co-Cu-Ni and Co-Cu-Zn trimetallic NPs. The adsorption process was exothermic, as evidenced from the positive ΔH° values. The negative values of ΔG° at the corresponding temperatures support the spontaneous nature of the adsorption processes. The positive entropy changes (ΔS°) suggested that there is more disorderness at the interface between the solid and the solution during the adsorption. The fabricated trimetallic nanoparticles have effectively adsorbed Crocein Orange G, which may be considered as an attractive option in wastewater treatment and environmental remediation applications due to diversity of metal ions on surface offering differential attractive forces for pollutant.

A Green Approach to Oil Spill Mitigation: New Hybrid Materials for Wastewater Treatment.

This study focuses on the development of adsorptive materials to retain degraded 5w40 motor oil. The materials were prepared using xanthan (XG) and XG esterified with acrylic acid (XGAC) as the polymeric matrix. LignoBoost lignin (LB), LB esterified with oleic (LBOL), stearic acid (LBST) and montmorillonite (CL) were added into XG and XGAC matrices to obtain the adsorbents. Adsorption experiments revealed that XG/CL/LBOL had the highest adsorption capacity at 46.80 g/g, followed by XGAC/CL at 45.73 g/g, and XG/CL at 37.58 g/g. The kinetic studies, employing the pseudo-second-order (PSO) model, indicated rapid sorption rates with a good correlation to experimental data. FTIR spectra analysis have evidenced the physical nature of adsorption process, involving interactions such as hydrogen bonding, van der Waals forces, and π-π interactions. Equilibrium data fitting to the Henry, Freundlich, and Temkin isotherm models showed that the adsorption occurs within materials diverse pore structures, enhancing oil retention. Structural parameters like density, porosity, and surface area were pivotal, with XG/CL/LBOL showing the most favorable properties for high oil adsorption. Additionally, it was found that the adsorption efficiency was influenced by the material's morphology and the presence of chemical modifications. This comprehensive evaluation highlights the potential of these novel adsorptive materials for environmental remediation applications, offering an efficient and sustainable approach to reducing degraded motor oil pollution.

2-Methylbenzimidazole-copper nanozyme with high laccase activity for colorimetric differentiation and detection of aminophenol isomers

Laccase is well-known for its eco-friendly applications in environmental remediation and biotechnology, but its high cost and low stability have limited its practical use. Therefore, there is an urgent need to develop efficient laccase mimetics. In this study, a novel laccase-mimicking nanozyme (MBI-Cu) was successfully synthesized using 2-methylbenzimidazole (MBI) coordinated with Cu2+ by mimicking the copper active site and electron transfer pathway of natural laccase. MBI-Cu nanozyme exhibited excellent catalytic activity and higher stability than laccase, and was utilized to oxidize a series of phenolic compounds. Environmental pollutant aminophenol isomers were found to display different color in solution when catalytically oxidized by MBI-Cu, which provided a simple and feasible method to identify them by the naked eye. Based on the distinct absorption spectra of the oxidized aminophenol isomers, a colorimetric method for quantitatively detecting o-AP, m-AP, and p-AP was established, with detection limits of 0.06 μM, 0.27 μM, and 0.18 μM, respectively. Furthermore, by integrating MBI-Cu-based cotton pad colorimetric strips with smartphone and utilizing color recognition software to identify and analyze the RGB values of the images, a portable colorimetric sensing platform was designed for rapid detection of aminophenol isomers without the need for any analytical instrument. This work provides an effective reference for the design of laccase nanozymes and holds significant potential for applications in the field of environmental pollutant monitoring.

Electrochemically deposited zinc oxide films on stainless steel for photo degradation of Basic Red 18 dye

<p style="margin-top:8px; margin-bottom:8px; text-align:justify"><span style="font-size:11pt"><span style="line-height:150%"><span style="font-family:Calibri,sans-serif"><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:"Times New Roman",serif">In this</span></span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:"Times New Roman",serif"> study, zinc oxide (ZnO) films have been electrochemically deposited on stainless steel and its photocatalytic activity on the degradation of BR 18 dyes was tested. The effects of different electrodeposition conditions such as deposition potential and deposition time on the nanostructures of ZnO films were investigated in detail and the best electrodeposition conditions were optimized. The electrochemical, structural and morphological, were characterized by cyclic voltammetry (CV), chronoamperometry, X-ray diffraction (XRD), scanning electron microscope (SEM), respectively. The best removal efficiency was 37% at -1.2 V, and increased up to 53% after 300 sec coating. The number of electrodes (1, 2, 3 and 4 coatings) and dye concentration (5, 10, 15 mg/L) covered with -1.2 V potential and the coating synthesized in 300 seconds were studied. A complete removal was obtained when the number of electrodes covered was 4 and at 5 mg/L initial dye concentration. The number of reuses was tested up to 5 cycles. ZnO coatings on stainless steel that were electrochemically charged showed good photocatalytic stability. </span></span></span><span style="font-size:12.0pt"><span style="line-height:150%"><span style="font-family:"Times New Roman",serif">Because ZnO films have both economic and environmental advantages, it is imperative that they can be synthesized using environmentally benign processes and used in photocatalysis. This novel strategy provides a chance to utilize ZnO film photocatalytic characteristics for a range of environmental remediation applications in addition to providing a sustainable wastewater management solution.</span></span></span></span></span></span></p>

Potential of ammonium adsorption of coal fly ash-based porous geopolymer granules

Abstract Porous geopolymer materials have been recently used in environmental remediation applications as adsorbents. This study is to investigate the NH4 + adsorption capacity of geopolymer activated from coal fly ash mixing with NaOH, Na2SiO3, and H2O2. The H2O2 with various ratios (0%, 4.5%, and 8.5%) were added into the fly ash pastes as blowing agents. The NH4 + adsorption capacity of these materials was examined concerning the effects of NaOH concentration, H2O2 contents, adsorbent particle sizes, dosages, and NH4 + concentration by batch adsorption test. The results show that adding 4.5% (G45) and 8.5% (G85) of H2O2 developed porous structures in geopolymer granules and their NH4 + adsorption capacity depends on their particle sizes and pore structures. In particular, geopolymer granules with 8.5% H2O2 exhibited higher NH4 + adsorption capacity than lower content of H2O2 in case of particle size of 3.0-8.0 mm. However, pulverized geopolymer still demonstrated the greatest NH4 + adsorption capacity. In addition, both granules G45 and G85 demonstrated a well-fit (R2 = 0.97-0.99) with Langmuir and Freundlich isotherms. The maximum NH4 + adsorption capacity of G85 was 19.86 mg/g, which indicated the NH4 + adsorption potential of porous geopolymer granules generated from waste materials such as coal fly ash.

Z-scheme heterojunction g-C3N4/GO/CuFe2O4 (CGC) nanocomposite: Enhanced photocatalytic, antibacterial and anticancer properties

This study synthesized a novel heterojunction nanocomposite, copper ferrite (CuFe2O4) modified graphitic carbon nitride (g-C3N4), and graphene oxide (GO) through a simple and cost-effective method. So, the heterojunction nanocomposite was confirmed by some techniques such as X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), vibrating sample magnetometer (VSM), photoluminescence (PL), Raman analyses, etc. These analyses showed that the nanocomposite is significantly used in environmental and biomedical applications. The nanocomposite exhibits excellent properties, making it a promising candidate for environmental remediation and biomedical applications. Applying GO can facilitate the transfer of electrons and enhance the photocatalyst adsorption capacity while using CuFe2O4 enhances the separate charges. The dye degradation process attained 96.5% promising efficiency in only 60 minutes and just 5.4% degradation after 30 minutes in dark conditions, which showed excellent activity to degrade methylene blue via the Z-scheme mechanism. Also, the optimal values of some factors such as Kinetic, pH, dosage, scavenger, and dye concentration were investigated. In addition, the antibacterial activity was examined by Gram-negative and Gram-positive bacteria, which showed effective activity. The nanocomposite made the area of inhibition on Escherichia coli and Staphylococcus aureus about 13.3± 0.8 and 7.6 ± 0.3 mm, respectively, which showed an attractive antibacterial agent. According to the MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) tetrazolium assay, the synthesized compound has no cytotoxic activity.

A novel nanofiltration membrane with a dual-charged layer to simultaneously remove anions and cations from acid mine drainage

A novel nanofiltration (NF) membrane with a positively and negatively dual-charged layer was finely designed in this study. The membrane was prepared by co-deposition of 4-tert-butylpyrocatechol (TBC) and polyethyleneimine (PEI) and electrostatic interaction to assemble positively and negatively charged functional layers on a substrate which is polyamide (PA)-based NF membrane. The NF membrane achieved excellent retention capacity through the combined effects of Donnan repulsion and electrostatic field trapping. The prepared membrane had a dense but thin surface layer with an average pore size of 0.84 nm, enabling an improved membrane flux of 8.66 L/(m2·h·bar) and high rejection to divalent inorganic salt ions (93.56 % Mg2+, 99.56 % SO42-). The membrane was used to treat acid mine drainage (AMD) and achieved an excellent retention capacity for ions in AMD (93.25 % Mg2+, 91.58 % Ca2+, 94.22 % Mn2+, 95.96 % SO42-), meeting industrial wastewater discharge standards. In addition, the NF membrane demonstrated good anti-fouling performance during the AMD treatment and significant potential for environmental remediation applications.

Metal-polyphenol network loaded ZIF-8 for efficient removal of fluoroquinolone antibiotics

A metal-polyphenol network functionalized on surface of zeolitic imidazolate framework-8 (MPN@ZIF-8) were fabricated for efficient removal of fluoroquinolones (FQs) antibiotics. Polyphenol as one kind versatile molecular glue was employed as organic ligand as well as linkage for growth and deposition of metal-polyphenol network (MPN) on ZIF-8 supporter. The prepared MPN@ZIF-8 composite was characterized by various methods. The parameters including the dosage of adsorbents, pH value, adsorption time and salt concentration affecting the adsorption process were systematically investigated. FQs adsorption isotherms and kinetics best fitted the Langmuir isotherm (R2 > 0.980) and pseudo-second-order model (R2 > 0.987), respectively. Thermodynamic studies showed that adsorption process of norfloxacin (NOR), ciprofloxacin (CIP) and enrofloxacin (ENR) were all spontaneous. The adsorption capacity of MPN@ZIF-8 were 104.60, 86.23 and 66.21 mg g−1 for NOR, CIP and ENR, respectively, which were significantly higher than those of precursor ZIF-8. The potential adsorption mechanism was stated, most likely involved in π-π interaction, hydrogen-bond and electrostatic interaction between the FQs and the MPN@ZIF-8. In addition, the removal efficiency of the three FQs on MPN@ZIF-8 was still above 95 % after recycle for four times. The recoveries of the three FQs were in the range of 77.1–100.1 % with RSDs below 7.8 % in real sample analysis. Compared with the methods in preparation of MOF-based composite, the fabrication method mentioned in this study is versatile, very easy, environmental friendly and low cost, which has potential in large-scale production for application in environmental remediation.

Biogenic synthesis of nickel cobaltite nanoparticles via a green route for enhancing the photocatalytic and electrochemical performances

Green synthesis aligns with the global demand for eco-friendly and sustainable technologies, reducing the dependency on harmful chemicals and high-energy processes typically used in conventional synthesis techniques. This study highlights a novel green synthesis route for nickel cobaltite nanoparticles (NiCO2O4 NPs) utilizing Hyphaene thebaica extract as a natural reducing and stabilizing agent. The synthesized NiCO2O4 NPs, with sizes ranging from 20 to 30 nm, exhibited uniform diamond-like structures as confirmed by SEM and TEM imaging. XRD analysis verified the polycrystalline nature of these nanoparticles, while EDS measurements confirmed the elemental composition of Ni and Co. The presence of functional groups was subsequently verified through FT-IR analysis, and Raman spectroscopy further confirmed phase formation. Electrochemical evaluations revealed significant pseudocapacitive behavior, showing a specific capacitance of 519 F/g, demonstrating their potential for high-performance supercapacitors. To further assess the applicability of the synthesized NiCO2O4 NPs, their photocatalytic activity against methylene blue (MB) dye was investigated, resulting in a 99% degradation rate. This impressive photocatalytic efficiency highlights their potential application in environmental remediation. Overall, this work underscores the significant potential of green synthesis methods in producing high-performance nanomaterials while simultaneously reducing environmental impact and promoting sustainable development.

Materials-driven strategies in bacterial engineering.

This perspective article focuses on the innovative field of materials-based bacterial engineering, highlighting interdisciplinary research that employs material science to study, augment, and exploit the attributes of living bacteria. By utilizing exogenous abiotic material interfaces, researchers can engineer bacteria to perform new functions, such as enhanced bioelectric capabilities and improved photosynthetic efficiency. Additionally, materials can modulate bacterial communities and transform bacteria into biohybrid microrobots, offering promising solutions for sustainable energy production, environmental remediation, and medical applications. Finally, the perspective discusses a general paradigm for engineering bacteria through the materials-driven modulation of their transmembrane potential. This parameter regulates their ion channel activity and ultimately their bioenergetics, suggesting that controlling it could allow scientists to hack the bioelectric language bacteria use for communication, task execution, and environmental response.

Expanded polystyrene (EPS) waste upcycling and efficient oil/water emulsion separation with advanced EPS-cotton membranes

The current work describe the fabrication of an oleophilic and hydrophobic EPS-cotton membrane through a facile one-step process, involving the immersion of pristine cotton fabric in a freshly prepared solution of EPS in tetrahydrofuran (THF). The characterization of EPS-cotton membrane is carried out using FTIR spectroscopy, scanning electron microscopy (SEM), and contact angle measurements. The EPS-cotton membrane exhibits remarkable absorption capacity for diesel, gasoline, olive oil, and canola oil, i.e., 0.21 gg−1, 0.13 gg−1, 3.7 gg−1 and 0.40 gg−1, respectively. Using vacuum filtration, the membrane effectively segregates diesel oil, gasoline, olive oil, and canola oil emulsions from water. The flux of membrane for diesel oil, gasoline, olive oil, and canola oil emulsions with water is found to be 133 LMH, 207 LMH, 59 LMH and 89 LMH, respectively. Moreover, the water rejection (%) remains above 95 % in all cases. The separated samples are monitored through FTIR and UV/Vis, which suggests high separation efficiency of EPS-cotton membrane. Furthermore, FTIR and SEM analyses of EPS-cotton membrane before and after separations demonstrate suitable membrane stability, allowing for at least six cycles of effective use. EPS-cotton membrane fabrication not only facilitates the eco-friendly recycling of waste plastics but also promises versatile applications in environmental remediation.

Fe/Ni bimetallic magnetic nano-alloy (INBMNA): An efficient heterogeneous catalyst for photo-Fenton-like degradation of phenol in aqueous environment

A lot of attention has been drawn to photo-Fenton-like catalysis among advanced oxidation processes for environmental remediation applications. Herein, we have successfully fabricated iron-nickel bimetallic magnetic nano-alloy (INBMNA) as an efficient heterogeneous photo-Fenton-like catalyst using the chemical reduction method and characterized by several analytical techniques. The characterization results show that the catalyst has a spherical shape with a mesoporous nature and contains a large specific surface area. The impact of various parameters was investigated and optimized to check the catalytic performance of INBMNAs and the found results showed that excellent photo-Fenton-like activity persisted under 6.0 pH conditions for the degradation of hazardous pollutant (phenol) under solar light exposure and microwave radiation power, respectively. Additionally, the exposed INBMNA/H2O2 system provided continuous redox cycles of Fe3+/Fe2+ and Ni2+/Ni0 pair in the Fenton-active species for stable operation. The photo-Fenton-like activity was also performed to check the effect of different inorganic anions which significantly hinder phenol reduction. Besides, the steady performance of the catalyst to remove phenol was performed in tap water and river water. Free radical trapping experiments were tested to know the role of important radicals in the photo-Fenton process. Moreover, the mechanism and possible degradation pathways of phenol were checked. By cyclic degradation experiments, the performance of the catalyst is stable and almost unchanged and can be reused several times. This study provides a promising INBMNA/H2O2 system, which encourages its widespread use in environmental remediation applications.

Polyaniline and Graphene Oxide or Reduced Graphene Oxide-Based Composites for Environmental Remediation Application

Polyaniline and Graphene Oxide or Reduced Graphene Oxide-Based Composites for Environmental Remediation Application

Valorization of Agriculture Residues into Value-Added Products: A Comprehensive Review of Recent Studies.

Global agricultural by-products usually go to waste, especially in developing countries where agricultural products are usually exported as raw products. Such waste streams, once converted to "value-added" products could be an additional source of revenue while simultaneously having positive impacts on the socio-economic well-being of local people. We highlight the utilization of thermochemical techniques to activate and convert agricultural waste streams such as rice and straw husk, coconut fiber, coffee wastes, and okara power wastes commonly found in the world into porous activated carbons and biofuels. Such activated carbons are suitable for various applications in environmental remediation, climate mitigation, energy storage, and conversions such as batteries and supercapacitors, in improving crop productivity and producing useful biofuels.

Molybdate-based Nanocrystalline Materials for Efficient Environmental Remediation and Electrochemical Energy Conversion Applications: An Update

Molybdate-based Nanocrystalline Materials for Efficient Environmental Remediation and Electrochemical Energy Conversion Applications: An Update

Heavy-Metal Ions Removal and Iodine Capture by Terpyridine Covalent Organic Frameworks.

Porous materials are excellent candidates for water remediation in environmental issues. However, it is still a key challenge to design efficient adsorbents for rapid water purification from various heavy metal ions-contaminated wastewater in one step. Here, two robust nitrogen-rich covalent organic frameworks (COFs) bearing terpyridine units on the pore walls by a "bottom-up" strategy are reported. Benefitting from the strong chelation interaction between the terpyridine units and various heavy metal ions, these two terpyridine COFs show excellent removal efficiency and capability for Pb2+, Hg2+, Cu2+, Ag+, Cd2+, Ni2+, and Cr3+ from water. These COFs are shown to remove such heavy metal ions with >90% of contents at one time after the aqueous metal ions mixture is passed through the COF filter. The nitrogen-rich features of the COFs also endow them with the capability of capturing iodine vapors, offering the terpyridine COFs the potential for environmental remediation applications.

Superparamagnetic hydrophilic molecularly imprinted nanoparticles for an efficient and selective removal of tetracycline from water

In this work, a novel superparamagnetic hydrophilic molecularly imprinted nanomaterial for the removal of tetracycline (TC) was synthesized utilizing magnetite (Fe3O4) as the magnetic core, TC as the template molecule, 3-aminopropyltriethoxysilane (APTES) as the functional monomer, and tetraethoxysilane (TEOS) as the cross-linker. Initially, Fe3O4 magnetic nanoparticles (MNP) coated with SiO2 (MNP@SiO2) were synthesized, followed by TC molecular imprinting on the nanoparticles. Initially, Fe3O4 MNP coated with SiO2 (MNP@SiO2) were synthesized, followed by TC molecular imprinting on the nanoparticles. The synthesis method for MNP@SiO2 was optimized, and DLS analysis of 10 replicates showed a nanoparticle size of 70.1 ± 5.8 nm, indicating high method reproducibility. The MNP@SiO2, as well as the imprinted (MNP@SiO2-MIP) and non-imprinted (MNP@SiO2–NIP) nanomaterials, were characterized by FTIR, TEM, VSM, XRD, DLS, Z potential, and BET analysis. The saturation magnetization (Ms) values were 43 emu/g for MNP@SiO2 and 32 emu/g for both MNP@SiO2-MIP and MNP@SiO2–NIP, confirming suitability for magnetic separation using external magnets. Batch binding experiments conducted in water and methanol assessed adsorption isotherms and binding kinetics, with data fitting the Langmuir isotherm model better than the Freundlich model. The developed MIP exhibited significant selectivity against other molecules with similar functional groups and size. In water, the adsorption capacity of the MNP@SiO2-MIP was 23 mg/g, with an imprinting factor of 2.2. Furthermore, the MIP demonstrated good regeneration performance. The material was tested on TC-spiked tap water samples, achieving 80.1 % TC removal with high reproducibility (3.2 %, n = 3). Combining hydrophilic superparamagnetic nanoparticles with molecular imprinting enhances their potential applications in environmental remediation, antibiotic purification, and drug delivery.

Synthesis and characterization of hierarchical Sr-doped ZnO hexagonal nanodisks as an efficient photocatalyst for the degradation of methylene blue dye under sunlight irradiation

This study presents the synthesis and comprehensive characterization of hierarchical hexagonal nanodisks of zinc oxide (ZnO) and strontium (Sr) doped ZnO, prepared via a hydrothermal method. The experimental synthesis procedure involved dissolving zinc nitrate in a water–ethanol mixture, followed by the addition of polyethylene glycol (PEG 200), sonication, and subsequent hydrothermal treatment. Different concentrations of Sr were introduced into the ZnO lattice to generate Sr-doped ZnO samples. Analysis of the obtained results revealed successful incorporation of Sr, evidenced by shifts in the X-ray diffraction (XRD) pattern and alterations in lattice parameters. Moreover, the Williamson-Hall plot indicated minimal strain and high structural stability in both pristine ZnO and Sr-doped ZnO. The morphology of the synthesized Sr-doped ZnO was confirmed through field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), revealing a hexagonal nano disk-shaped morphology akin to pristine ZnO. Elemental composition analysis conducted via X-ray photoelectron spectroscopy (XPS) further confirmed the presence of Sr in the doped ZnO samples. Evaluation of photocatalytic activity against methylene blue dye demonstrated superior performance of the 5 % Sr-doped ZnO catalyst, attributed to its increased surface area compared to pristine ZnO. Notably, the highest degradation rate constant (k) of 0.0389 min−1 was observed for the 5 % Sr-doped ZnO catalyst, emphasizing its efficacy in environmental remediation applications. This research underscores the potential of Sr-doped ZnO as a promising photocatalyst, offering stability, reusability, and effective utilization of UV and visible light for catalytic processes.

All-Aqueous Soft Milli-swimmers.

Microscale swimmers are attractive for targeted drug delivery, noninvasive microsurgery and environmental remediation at different length scales, among which, Marangoni-based swimmers have garnered considerable attention due to their independence of external energy supply. However, applications of most existing chemical swimmers are limited by complex fabrication, high cost, utilization of organic (or even toxic) solvents, poor motility performance, and lack of controllability. To address these challenges, we propose an approach for all-aqueous soft milli-swimmers that utilizes biodegradable hydrogels and biocompatible fuels. This innovative method achieves swimmer body generation and fuel loading in one step by simply dripping one aqueous solution into another, saving fabrication time and minimizing fuel loss during transfer. These all-aqueous soft milli-swimmers have rove beetle-like self-propulsion, which stores low-surface-energy compounds within their body for propulsion on liquid surfaces. Isotropic and anisotropic all-aqueous soft milli-swimmers are formed with precise control over their dimension, morphology, and movement velocity. Through their motion within engineered channels, intricate labyrinths, dynamic air-liquid interfaces, and collective self-assemblies, their remarkable adaptability in complex aqueous environments is demonstrated. Furthermore, the integration of functional nanoparticles endows these all-aqueous milli-swimmers with multifunctionality, expanding their applications in cargo transportation, sensing, and environmental remediation.

Methyl orange sorption on octadecylamine-modified iron oxide magnetic nanoparticles

This study investigates the sorption of 2-methyl orange dye onto octadecylamine-modified iron oxide magnetic nanoparticles (ODA-IONPs). The synthesized ODA-IONPs exhibit remarkable sorption capacity, reaching 800 mg/g at the nanoparticle concentrations ranging from 5 to 10 mg/g and pH of 2–8. The sorption process demonstrates rapid kinetics, achieving 90% of maximum sorption within 0.5 min. Thermodynamic analysis showed that sorption process is spontaneous and endothermic, as indicated by negative ΔG and positive ΔH values. The pseudo-second-order and Langmuir models best describe the sorption kinetics at 293 K (R² 0.99). Compared to other adsorbents, ODA-IONPs show superior MO removal capacity under a wider pH range. The influence of nanoparticle concentration, pH, and temperature on sorption efficiency is systematically explored, with optimal conditions identified at 10 mg/L ODA-IONPs and pH 6. Furthermore, the feasibility of nanoparticle reusability for sorption purposes is assessed. These findings underscore the potential of ODA-IONPs as efficient sorbents for wastewater treatment and environmental remediation applications.