Environmental Nanotechnology, Monitoring and Management最新文献

{"title":"Sorption of hexavalent chromium ion onto natural swelling clay and acidified clay as a nano adsorbent: Kinetic and thermodynamic study","authors":"Niraka Blaise ,&nbsp;Aguiza Abai Emmanuel ,&nbsp;Mohamed Oubaouz ,&nbsp;El Mostafa Erradi ,&nbsp;Cherrat Ayoub ,&nbsp;Kofa Guillaume Patrice ,&nbsp;Ndi Koungou Sylvère ,&nbsp;Hambate Gomdje Valery ,&nbsp;Abdelilah Chtaini","doi":"10.1016/j.enmm.2025.101098","DOIUrl":"10.1016/j.enmm.2025.101098","url":null,"abstract":"<div><div>Natural clay (NC) from Makabaye (Far North Cameroon) was pre-treated according to the stocks method and the resulting powder was subjected to acid treatment (HCl at 0.5 M) to obtain acidified clay (AC) material. These materials (NC and AC) were subjected to morphological and structural characterization and then to successive adsorption (in batch mode) and desorption studies for hexavalent chromium until AC lost its adsorptive properties. These analyses showed the exfoliation of the clay after acidification. The influence of experimental parameters such as the variation in contact time, the mass of adsorbent, the pH of the solutions, the initial concentration of Cr (VI) ions were studied showed that each of the parameters influences the adsorption process. The results showed that adsorption equilibrium was reached after 20 min with both adsorbents. The optimum quantities of Cr (VI) ions adsorbed by the adsorbent were obtained for masses of 0.100 g. Maximum adsorption of Cr (VI) ions was obtained at pH = 3 with both adsorbents. This work also showed that by keeping the optimum parameters fixed, the quantity of chromium ions adsorbed increased significantly before stabilising at 15 mg/L with the two clay samples. Under these same optimum conditions, the maximum quantity adsorbed was obtained with the acidified clay and the natural clay, i.e. 29.41 mg/g and 27.78 mg/g respectively. The application of adsorption isotherms has shown that the Langmuir model (R² = 0.980 with AC and R² = 0.971 with NC) and Dubinin-Radushkevich model (R² = 0.917 with AC and R² = 0.991 with NC) better describes the adsorption mechanism of Cr (VI) ions than those of Freundlich and Temkin model. The kinetic study has shown that the pseudo-second order equation satisfactorily describes the adsorption mechanism (R² = 0.998 with AC and R² = 0.995 with NC). The thermodynamic study showed that the adsorption of Cr (VI) on the two adsorbents is spontaneous, exothermic with NC and endothermic with AC. The desorption study showed that the adsorbent (AC) could be regenerated to 98.32 % after 70 min under agitation at 150 rpm for a concentration of 1.5 M EDTA. The reused adsorbent showed desorption percentages ranging from 98.88 % (after the 1st recycling) to 85.56 % (after the 6th recycling). A very rapid decrease in the desorption of chromium by AC was observed from the 7th cycle of reuse (57.68 %) until the complete loss of this desorption at the 10th cycle (0.12 %).</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101098"},"PeriodicalIF":0.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term effect of aluminum oxide nanoparticles on activated sludge performance in sequencing batch reactors","authors":"Nina Doskocz,&nbsp;Katarzyna Affek,&nbsp;Monika Załęska-Radziwiłł","doi":"10.1016/j.enmm.2025.101096","DOIUrl":"10.1016/j.enmm.2025.101096","url":null,"abstract":"<div><div>Nanoparticles (NPs) have raised global concerns due to their extensive use and detrimental impacts on ecosystems. While wastewater treatment plants (WWTPs) are viewed as potential sources of nanocompounds in the environment, the influence of aluminum oxide nanoparticles (Al₂O₃NPs) on wastewater treatment remains uncertain. This study aimed to explore the long-term effects of wastewater-borne Al₂O₃NPs and their bulk counterparts on the effectiveness of pollutant removal within sequencing batch reactors (SBRs), activated sludge performance, internal biological activity/viability, and microbial community diversity and structure. The presence of Al₂O₃NPs was observed to induce alterations in the removal efficiency of COD, <span><math><mrow><msubsup><mrow><mi>N</mi><mi>H</mi></mrow><mrow><mn>4</mn></mrow><mo>+</mo></msubsup><mo>-</mo></mrow></math></span> N, and SOP from wastewater, as well as impacting the nitrification process during prolonged exposure. Al₂O₃NPs in wastewater accumulated in the sludge, affecting its morphology and diminishing microbial viability and biological activity. Additionally, high throughput sequencing of 16S rRNA indicated that Al₂O₃NPs could impact on the microbial richness and diversity of activated sludge in the SBR. In contrast, wastewater containing bulk counterparts did not negatively influence the capacity of wastewater treatment plants. This research provides novel and crucial insights into the effects of Al₂O₃NPs on the biological wastewater treatment process, holding significance for risk assessment procedures.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101096"},"PeriodicalIF":0.0,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution and risk assessment of potentially toxic elements in urban wastewaters of Mexico City","authors":"Samuel Pérez- Rodríguez ,&nbsp;J. Tabla-Hernández ,&nbsp;A.G. Hernández–Ramírez ,&nbsp;S.B. Sujitha ,&nbsp;M.P. Jonathan ,&nbsp;Marco Moreno-Ibarra","doi":"10.1016/j.enmm.2025.101097","DOIUrl":"10.1016/j.enmm.2025.101097","url":null,"abstract":"<div><div>The present study assessed the contamination of potentially toxic elements (Cd, Co, Cu, Fe, Mn, Ni, Pb, and Zn) in urban wastewaters from Mexico City, Mexico, using atomic absorption spectroscopy for risk assessment. A total of thirty-two water samples were systematically collected from the River de los Remedios (n = 17), River Tlalnepantla (n = 4), and River San Javier (n = 11) in the northern part of the metropolitan area. Results showed that average elemental concentrations, in mg L^-1, followed the order: Mn (0.39) &lt; Pb (0.17) &lt; Fe (0.12) &lt; Cu, Ni, Zn (0.06) &lt; Co, Cd (0.02), reflecting the impact of raw industrial and domestic discharges from the highly urbanized region. Concentrations of Pb and Cd surpassed the legal limits of 0.03 and 0.004 mg L^-1, respectively, for wastewater discharge. Statistical analysis of physicochemical parameters and element levels indicated that industrial activities are the main sources of PTEs. The level of pollution was assessed using the heavy metal evaluation index (HEI), contamination factor (CF), and Nemerow pollution index (NPI); results indicated moderate contamination by Pb and overall slight pollution. Human risk assessment calculated for the inhalation and dermal exposure pathways in adults and children indicated that Cd and Pb were the most critical elements that could pose adverse health effects to the local population. Dermal contact was identified as the potential exposure pathway that could pose potential risks to human health. The findings of this study indicate a deteriorating status of the aquatic system in Mexico City, primarily due to the persistent discharge of untreated wastewater, which poses a significant risk to environmental integrity and human health within the urban area.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101097"},"PeriodicalIF":0.0,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Next-generation remediation tools: A review on cyclodextrin-based nanocomposites","authors":"Alka Rai ,&nbsp;Amarpreet K. Bhatia ,&nbsp;Sunitha B. Mathew ,&nbsp;Sunita Sanwaria ,&nbsp;Ajaya Kumar Singh ,&nbsp;Ravin Jugade","doi":"10.1016/j.enmm.2025.101093","DOIUrl":"10.1016/j.enmm.2025.101093","url":null,"abstract":"<div><div>Water contamination has attracted considerable attention due to its potentially devastating consequences on human health and the environment. Therefore, cutting-edge remediation technology development becomes a crucial environmental concern. A wide variety of techniques, such as adsorption, ion exchange, electrolysis, membrane process, reverse osmosis, and coagulation, have been used to remove hazardous heavy-metal-ions, organic contaminants, and dyes from water. Adsorptive confiscation of water toxicants based on functionalized polymers, biopolymers and metal organic frameworks is the key to wastewater treatment. Functionalization of these materials aim at three major objectives: (i) enhancing adsorption capacities of the material, (ii) improve selectivity towards desired pollutant, (iii) recyclability and reusability of material in multiple cycles. Recent literature has revealed that the cyclodextrin-derived nanocomposites have been identified as the most promising adsorbents for the removal of contaminants among the different conventional adsorbing materials. The structural and functional composition of cyclodextrin has shown a potential to meet all the three objectives making it a promising material in native form as well as modified forms for water detoxification. This article presents anup-to-date compilation of recent advances in the synthesis and study of adsorbents based on Cyclodextrin nanocomposites for the remediation of a wide range of contaminants. This review has been primarily focused onheavy-metal-ions, organic pollutants and dyes removal studies. Finally, this review may serve as a springboard for further study and provide insight into potential future developments and obstacles concerning Cyclodextrin nanocomposites in the role of adsorbents.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101093"},"PeriodicalIF":0.0,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly sensitive and selective detection of Cd2+ and Pb2+ in aqueous system using miniaturized Bi2O3/plastic chip electrode based electrochemical sensor","authors":"Km Sapna ,&nbsp;Vartika Sharma ,&nbsp;Kamlendra Awasthi ,&nbsp;Divesh N. Srivastava ,&nbsp;Manoj Kumar ,&nbsp;Vaibhav Kulshrestha","doi":"10.1016/j.enmm.2025.101095","DOIUrl":"10.1016/j.enmm.2025.101095","url":null,"abstract":"<div><div>A facile and miniaturized Bi₂O₃/plastic chip electrode (PCE) was designed for concurrent electrochemical identification of Cd²⁺ and Pb²⁺. The identification was carried out through the potentiostatic electrodeposition of bismuth onto a PCE. The synthesized Bi₂O₃/PCE was analyzed employing scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) to assess their morphology, crystal structure, and elemental composition, respectively. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were performed to explore electrochemical characteristics of synthesized electrodes. Under optimal experimental conditions, Bi₂O₃/PCE demonstrated significant electro-catalytic performance for Cd²⁺ and Pb²⁺ at lower pH, with augmented square wave-anodic stripping peak currents compared to unmodified PCE. Bi₂O₃/PCE exhibits an exceptionally high sensitivity of 12 μA L cm⁻² μg⁻¹ for Cd²⁺ and 20 μA L cm⁻² μg⁻¹ for Pb²⁺ with low detection limit of 0.09 μg L⁻¹ for Cd²⁺ and 0.07 μg L⁻¹ for Pb²⁺. The developed sensor shows highly reproducible and repeatable performance with an extensive linear range 0.2–––300 μg L⁻¹ for Cd²⁺ and 0.1–––250 μg L⁻¹ for Pb²⁺ and also exhibits good selectivity, even when accompanied by common interfering ions.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101095"},"PeriodicalIF":0.0,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of flexible SERS substrates based on silver nanoparticles and graphene quantum dots on fiberglass for enhanced dye detection","authors":"Nurul Mutmainnah Ramlan ,&nbsp;Isnaeni Isnaeni ,&nbsp;Adnan Fatahillah Afiff ,&nbsp;Maria M. Suliyanti ,&nbsp;Dahlang Tahir","doi":"10.1016/j.enmm.2025.101094","DOIUrl":"10.1016/j.enmm.2025.101094","url":null,"abstract":"<div><div>This study presents the development of a flexible Surface Enhanced Raman Spectroscopy (SERS) substrate by combining Silver Nanoparticles (Ag NPs) and Graphene Quantum Dots (GQD) on fiberglass (FG) substrates. GQD is synthesized using an electrolysis method, and Ag NPs are deposited onto the substrate via microwave-assisted hydrothermal synthesis. The resulting substrates, GQD25% + Ag NPs @FG and GQD0.78 % + Ag NPs @FG, were used to detect Raman signals from three different dyes: Malachite Green (MG), Methylene Blue (MB), and Eriochrome Black T (EBT). The SERS results indicate that the GQD0.78 % + Ag NPs @FG substrate exhibits higher sensitivity than GQD25% + Ag NPs @FG. The SERS signal is enhanced by 1.98–2.26 times and 2.54–3.53 times on the GQD25% + Ag NPs @FG and GQD0.78 % + Ag NPs @FG substrates, respectively, due to the presence of GQD, indicating the significant role of GQD concentration in enhancing the Raman signal. This research highlights the potential of flexible SERS substrates for cost-effective, high-sensitivity detection, particularly in environmental and industrial applications.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101094"},"PeriodicalIF":0.0,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eggshell waste as a sustainable resource for nanoparticle preparation; synthesis, characterization and applications","authors":"Eman Ayman Nada ,&nbsp;Mallak Eyad Abu Kaddorah ,&nbsp;Mazen El Jamal ,&nbsp;Amal Hamad ,&nbsp;Fotouh R. Mansour","doi":"10.1016/j.enmm.2025.101092","DOIUrl":"10.1016/j.enmm.2025.101092","url":null,"abstract":"<div><div>There has been substantial interest in using eggshell waste for the creation of environmentally-friendly products. This review discusses on the synthesis and examination of nanoparticles obtained from eggshells, with a particular focus on their suitability for usage in environmental and catalytic settings. Calcination and mechanical grinding are acknowledged as effective techniques for generating eggshell nanoparticles. Calcination is a high-temperature process that converts calcium carbonate (CaCO₃) into calcium oxide (CaO). On the other hand, mechanical grinding is a method used to decrease the size of particles to the nanoscale. The text examines different methods employed for characterization, such as thermogravimetric analysis (TGA) for evaluating thermal stability, zeta potential for assessing surface charge and stability, X-ray diffraction (XRD) for identifying crystal structure, Fourier transform infrared (FTIR) spectroscopy for detecting functional groups, energy-dispersive X-ray (EDX) spectroscopy for determining elemental composition, dynamic light scattering (DLS) for analyzing particle size distribution, and atomic force microscopy (AFM) for visualizing surface morphology. The produced nano-hydroxyapatite shows promise as an adsorbent for effectively eliminating arsenic and heavy metals from water systems, hence contributing to sustainable waste management and advancements in materials. This work offers a thorough comprehension of the procedure involved in producing and examining eggshell nanoparticles. Acquiring this information is crucial for effectively utilizing them in environmental remediation and catalytic processes.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101092"},"PeriodicalIF":0.0,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rationale of AgNPsmodified 3-dimensional grapheneas electrochemical sensor for the ultra-tracedetermination of mercury ions","authors":"Prasanta Kumar Sahoo ,&nbsp;Srikant Sahoo ,&nbsp;Rajendra Prasad Pandey ,&nbsp;Ashis Kumar Satpati","doi":"10.1016/j.enmm.2025.101089","DOIUrl":"10.1016/j.enmm.2025.101089","url":null,"abstract":"<div><div>Mercury (Hg) is a globally accepted highly toxic heavy metal pollutant and despite several important developments in the field, the determination of Hg²⁺ ions attrace levels in real-world samples is a challenge. Herein, the silver nanoparticles modified with three-dimensional graphene (AgNPs/3D-graphene) nanocomposite has been synthesised through a simple, cost-efficient, one-step freeze-casting routethat has been applied for highlysensitive determination of Hg²⁺. The 3D cellular network structure with continuous micrometersize open pores and uniformly decorated Ag nanoparticles with an average size of 30 nm has been suggested by the morphologies and structures of the as-prepared AgNPs/3D-Graphene nanocomposite. The AgNPs/3D-graphene nanocomposite-modifiedGCE (AgNPs/3D-graphene/GCE) exhibited a good linear relationship with Hg²⁺ concentrations ranging from 0.1 to 40 μg L⁻¹. The results showed that the limit of detection (LOD) of 0.08 μg L⁻¹ (S/N = 3), which is significantly less than the World Health Organization’s (WHO) recommended threshold. The method validation has been carried out using certified reference material (CRM). The sensitivity and stability from the composite has been achieved from the well scaffolded AgNPs all along the 3D-graphene network, which has made the method novel and stand out from othere reported. The suggested electrochemical sensor performed well in detecting Hg²⁺ in soil and borewell water samples as well as in clinical samples, which is crucial in safeguarding human health.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101089"},"PeriodicalIF":0.0,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144781269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the sonophotocatalytic activity of Fe(III) doped cobalt oxide nanoparticles prepared by planetary ball milling method in the degradation of amoxicillin as a pollutant","authors":"Masih Darbandi,&nbsp;Hadis Asadi,&nbsp;At-har Najafi","doi":"10.1016/j.enmm.2025.101091","DOIUrl":"10.1016/j.enmm.2025.101091","url":null,"abstract":"<div><div>The world’s waters threatened by the dual forces of demographic growth and industrial expansion. Advanced oxidation techniques, particularly photocatalytic processes, offer a practical and eco-friendly solution to this problem by decomposing organic contaminants, providing a cleaner and safer aquatic environment. Doping of iron(III) ions through the ball milling method was applied to study the activity of nanoparticles (NPs) in the visible spectrum. Advanced techniques were employed to characterize synthesized NPs, utilizing Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), and Brunauer-Emmett-Teller (BET). The synthesized NPs exhibit a consistent mesoporous structure, as demonstrated by the experimental findings. Research findings indicate that the application of sonocatalytic, photocatalytic, and sonophotocatalytic techniques significantly reduced amoxicillin (AMX), a pharmaceutical pollutant, levels by 46.26%, 60.34%, and 83.14%, respectively, within the one-hour timeframe when utilizing Co₃O₄/Fe³⁺ NPs. The 40.37% synergistic effect demonstrated the doped NPs’ efficiency. Additionally, the experimental data strongly aligns with the pseudo-second-order equation, confirming the reaction’s adherence to second-order kinetics. Scavengers like formic acid, disodium oxalate, and isopropanol demonstrated a reduction impact, slowing down the degradation rate by 29.44%, 36.62%, and 74%, respectively. Furthermore, across all four cycles, the negligible decline in the degradation rate confirmed the Co₃O₄/Fe³⁺ NPs’ reusability and performance.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101091"},"PeriodicalIF":0.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green conductive paper derived from sago pulp of Southeast Sulawesi based on magnetic nanocomposite of Fe3O4/carbon nanofibers for phenol adsorption","authors":"Alimin Alimin ,&nbsp;Sri Juari Santosa ,&nbsp;Akrajas Ali Umar ,&nbsp;Rahmayanti Rahmayanti ,&nbsp;Alham Alham","doi":"10.1016/j.enmm.2025.101090","DOIUrl":"10.1016/j.enmm.2025.101090","url":null,"abstract":"<div><div>A green conductive magnetic nanocomposite paper that has been synthesized by decorating carbon nanofibers (CNFs) with Fe₃O₄ nanoparticles (Fe₃O₄/CNFs) and mixed with sago pulp as phenol adsorbents has been investigated. The paper was synthesized using sago pulp waste from the sago farmer’s community. To produce cellulose paper, Sago pulp was treated mechanically and chemically through dehemicellulose and delignification techniques. Fe₃O₄ was synthesized by ultrasonication of iron sand in NaOH solution (8 M) for 120 min at 70 °C. The nanocomposite of Fe₃O₄/CNFs was prepared by ultrasonication Fe₃O₄ and CNFs in water. The nanocomposite paper was finally prepared by mixing sago’s cellulose and polyvinyl alcohol (PVA) with ultrasonication, followed by solvent casting drying. The phase crystallinity of the paper was evaluated via X-ray Diffraction (XRD) and Fourier Transform infrared (FTIR) spectroscopy. The phenol’s sensing and adsorption kinetic properties over the magnetic paper were examined using a UV–Vis spectrophotometer at a maximum wavelength of 269 nm. The result showed that the phenol was efficiently adsorbed on magnetic paper under an optimum pH of 7 at a contact time of 90 min. The adsorption followed Ho-McKay pseudo-second-order kinetics with adsorption capacity at an equilibrium of 3.15 mg/g. The magnetic and conductive paper of Fe₃O₄/CNFs should be extensively used in the adsorption of phenolic compounds in the environment.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101090"},"PeriodicalIF":0.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}