Colloids and Surfaces C: Environmental Aspects最新文献

{"title":"Experimental and molecular dynamics simulation studies on the effect of composite surfactants on the wettability of anthracite coal","authors":"Limin Du ,&nbsp;Jun Nian ,&nbsp;Jinqi Fu ,&nbsp;Xiaoyan Wang ,&nbsp;Congcong Peng","doi":"10.1016/j.colsuc.2024.100050","DOIUrl":"10.1016/j.colsuc.2024.100050","url":null,"abstract":"<div><div>In order to improve the wettability of coal bed water injection, the effects of several composite surfactants on the wettability of anthracite coal were investigated. Firstly, the wettability of different composite surfactants on anthracite was analysed by macroscopic experiments (surface tension and settling time) to determine the optimal concentration and optimal ratio of composite surfactants. Secondly, the effects of adsorption of different composite surfactants on the physicochemical properties of the coal dust surface were investigated by mesoscopic experiments (scanning electron microscopy, energy spectrometer analysis, infrared spectroscopy, X-ray electron spectroscopy and zeta potential), and the results showed that the content of hydrophilic functional groups (Si-O-Si, C-O-C, C-O and C<img>O) on the surface of anthracite coal after treatment with the composite surfactant increased significantly, and the surface potential value decreased significantly in absolute value, agglomerated large coal particles would be formed on the coal surface, and the cracks between coal particles were favourable for the penetration of aqueous solution. Finally, the synergistic mechanism of different composite surfactants was analysed from the perspective of microscopic molecular simulation. The results showed that the composite surfactants enhanced the interaction energy of the coal/composite surfactant/water system, improved the relative concentration distribution of the system, and increased the diffusion coefficient of water molecules. The results of the study can provide valuable guidance for the development of new composite surfactants with wetting effect, which has important application value for mine dust control.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100050"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593568","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":"Carbothermally synthesized, lignin biochar-based, embedded and surface deposited nano zero-valent iron composites: Comparative material characterization, selective gas adsorption and nitroaromatics remediation","authors":"Yasmitha A. Alahakoon ,&nbsp;Shine C. Wilson ,&nbsp;Chathuri Peiris ,&nbsp;Yohara K. Ranasinghe ,&nbsp;Sameera R. Gunatilake ,&nbsp;Xuefeng Zhang ,&nbsp;Todd E. Mlsna ,&nbsp;Upul Kumarasinghe ,&nbsp;M.Infas H Mohideen ,&nbsp;Upendar Reddy Gandra ,&nbsp;Anish Mathai Varghese ,&nbsp;Georgios N. Karanikolos ,&nbsp;Dinesh Mohan","doi":"10.1016/j.colsuc.2024.100048","DOIUrl":"10.1016/j.colsuc.2024.100048","url":null,"abstract":"<div><div>Biochar (BC) with nanoscale zero-valent iron (nZVI) incorporation offers advantageous materials for water purification. While the most common approach for nZVI incorporation is the deposition on -a carrier surface, embedding in -a support matrix has also been reported. However, the behavior of the embedded material in contaminant removal has not been adequately studied -nor the characteristics and the remediation capabilities of the two materials have been compared. Present study focuses on preparing and extensively characterizing two materials: nZVI embedded in (Lig-e-nZVI) and surface deposited on (Lig-s-nZVI) lignin BC followed by a comparative study of remedial action for two nitroaromatics, p-nitroaniline (pNA) and p-nitrophenol (pNP). The synthesis of Lig-e-nZVI and Lig-s-nZVI involved simultaneous and subsequent pyrolysis of lignin and carbothermal reduction of the iron salt, respectively. Lig-e-nZVI showed enhanced porosity. XRD confirmed the formation of Fe⁰. HR-TEM images proved the core-shell structure of nZVI, and an interlayer spacing of 0.36 nm of the shell verified that the Fe⁰ particles were encapsulated with graphene while an iron carbide inner layer was also observed, thinner in Lig-e-nZVI and thicker in Lig-s-nZVI. A band gap energy of 2.54 eV suggested photocatalytic activity for both materials. Best fitted Sips isotherms showed 23.1 and 13.1 mg g⁻¹ capacities for Lig-s-nZVI in pNP and pNA adsorption respectively. Highest stability was portrayed by Lig-e-nZVI over 4 regeneration cycles. The physicochemical features of the developed materials further enabled selective gas adsorption. Findings provide new insights into physicochemical characteristics and remedial actions of differently synthesized nZVI-BC composites.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100048"},"PeriodicalIF":0.0,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533747","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":"Antifungal, antibacterial and antioxidant activity of Pinus roxburghii mediated green synthesized zinc and gadolinium doped manganese oxide nanoparticles","authors":"Meena Devi ,&nbsp;Sheetal Sharma ,&nbsp;Pankaj Kumar ,&nbsp;Nikesh Thakur ,&nbsp;Gulshan Kumar ,&nbsp;Manu Vineet Sharma ,&nbsp;Arti Jamwal Sharma ,&nbsp;Kuldeep Kumar ,&nbsp;Arvind Sharma ,&nbsp;Kamal Jeet ,&nbsp;Naveen Thakur","doi":"10.1016/j.colsuc.2024.100046","DOIUrl":"10.1016/j.colsuc.2024.100046","url":null,"abstract":"<div><div>The exploration into the synthesis and characterization of manganese oxide nanoparticles (MO NPs) has garnered considerable attention, driven by their potential applications across various fields, particularly in medicine and biotechnology. This study focuses on investigating the diverse biological functions of Zinc doped (Zn)-MO and Gadolinium doped (Gd)-MO NPs, including their antifungal, antibacterial, and antioxidant properties. The NPs were synthesized using a sustainable green approach incorporating phytochemicals sourced from <em>Pinus roxburghii</em>. XRD confirmed tetragonal structure for both Zn-CuO and Gd-CuO NPs. Examination TEM and SEM-EDS revealed spheroidal NPs with diameters ranging from 8 to 12 nm. Evaluation of antifungal activity exhibited promising outcomes, indicating the capability of both Zn-MO and Gd-MO NPs to hinder fungal growth, suggesting their potential as antifungal agents. Similarly, the antibacterial effectiveness of these NPs was demonstrated by their ability to impede bacterial growth, highlighting their potential in addressing bacterial infections and potentially combating antibiotic resistance. Furthermore, the antioxidant activity of Zn-MO and Gd-MO NPs was assessed, revealing their capacity to scavenge free radicals and alleviate oxidative stress. In summary, the results emphasize the significant biological activities of Zn-MO and Gd-MO NPs, positioning them as promising candidates for further exploration and development in biomedical and pharmaceutical research.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100046"},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442613","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":"Enhanced photocatalytic degradation activity of titanium dioxide by adsorbing aromatic amines through N-bonding","authors":"Shivam Patel ,&nbsp;Sagnik Mukherjee ,&nbsp;Mahesh Neem ,&nbsp;Subhadip Neogi ,&nbsp;K.L. Ameta ,&nbsp;Arvnabh Mishra ,&nbsp;M.P. Deshpande ,&nbsp;Manish Kumar Mishra","doi":"10.1016/j.colsuc.2024.100047","DOIUrl":"10.1016/j.colsuc.2024.100047","url":null,"abstract":"<div><div>Narrowing the wide band gap of TiO₂ (∼3.2 eV) to enhance its visible light efficiency is crucial for advancing photocatalytic degradation of organic pollutants in industrial wastewater. In this study, we achieved band gap reduction and slowed recombination rates by adsorbing some aromatic amines, like aniline and its electron-donating derivatives, onto TiO₂. The predominantly present N-bonded amine species reduced the band gap and decelerated charge carriers’ recombination, enhancing photocatalytic degradation under visible light. In contrast, the amine with electron-withdrawing group is adsorbed as only H-bonded species, which showed no improvement in photocatalytic activity, performing similarly to pristine TiO₂. This surface modification strategy offers potential for creating visible light-driven photocatalysts for effective degradation of organic pollutants in water.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100047"},"PeriodicalIF":0.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417208","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":"Transferring red mud to efficient adsorbent for the adsorption and immobilization of Ni(Ⅱ) from aqueous solution","authors":"Wei Zhong ,&nbsp;Xintong Li ,&nbsp;Xin Ma ,&nbsp;Zhanfang Cao ,&nbsp;Hong Zhong ,&nbsp;Jia Yang ,&nbsp;Shuai Wang","doi":"10.1016/j.colsuc.2024.100045","DOIUrl":"10.1016/j.colsuc.2024.100045","url":null,"abstract":"<div><div>Red mud, a solid waste produced in large quantities, possesses a high specific surface area and is rich in metal oxides, making it a promising material for adsorbent preparation. However, its practical application is constrained by its relatively low adsorption capacity and the potential environmental risks it poses. This study focused on the preparation of modified red mud (MRM) with enhanced adsorption performance for Ni²⁺ using a hydrothermal method involving sodium hydroxide and colloidal silica. The maximum adsorption capacity of MRM for Ni²⁺ reached 8.22 mmol·g^–1, a substantial improvement compared to raw red mud (0.28 mmol·g^–1) and sulfuric acid-activated red mud (0.46 mmol·g^–1). The pseudo-second-order kinetic and Langmuir isotherm models accurately described the monolayer chemical adsorption process of Ni²⁺ on MRM. Additionally, leaching tests with simulated rainwater demonstrated that Ni-loaded MRM exhibited high stability, suggesting its potential for safe stockpiling or repurposing, such as in construction materials. Sequential extraction, XRD, FT-IR, and XPS results revealed that cation exchange was the primary mechanism in the adsorption process, with Ni²⁺ being immobilized within the zeolite framework structure of MRM, contributing to its strong adsorption stability. Inner-sphere complex formation also played a role in Ni²⁺ adsorption. In conclusion, this method offers an effective approach to both red mud utilization and heavy metal removal from wastewater, presenting a practical solution for waste management through resource recovery and environmental remediation.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100045"},"PeriodicalIF":0.0,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142417207","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":"Comprehensive assessment of heavy metal contamination in soil-plant systems and health risks from wastewater-irrigated vegetables","authors":"Muhammad Anis Aslam ,&nbsp;Muhammad Sohail Abbas ,&nbsp;Muhammad Mustaqeem ,&nbsp;Maryam Bashir ,&nbsp;Adeeba Shabbir ,&nbsp;Muhammad Talha Saeed ,&nbsp;Rana Muhammad Irfan","doi":"10.1016/j.colsuc.2024.100044","DOIUrl":"10.1016/j.colsuc.2024.100044","url":null,"abstract":"<div><p>A research study examined the origins, human health impacts, and risks associated with pollutants in vegetables grown in soil irrigated with wastewater. The study analyzed 164 samples from water sources, irrigated soil, and harvested vegetables for eight heavy metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) using atomic absorption spectrophotometry. The focus was on the potential health effects of consuming heavy metal-contaminated vegetables grown in wastewater-irrigated soil. The findings revealed significant accumulation of heavy metals in soil and plants from Mianwali, Pakistan, posing potential health risks to consumers. When compared to vegetables produced with freshwater irrigation, the concentration levels of heavy metals in the soil irrigated with untreated wastewater were significantly greater (P≤0.001) and above the recommended limits set by the World Health Organization (WHO). The results showed that heavy metals in the soil had significantly increased, and crops had subsequently absorbed these metals. Produce raised in soil watered with wastewater showed higher levels of heavy metals than the US Environmental Protection Agency (EPA) and the WHO recommended. Among the veggies, lead (Pb) and cadmium (Cd) were found to have higher Hazardous Quotient Indices (HRIs) than one. This indicates that both adults and children may have been exposed to dangerous levels of these metals. Additionally, for Brassica oleracea, Raphanus sativus, and Spinacia oleracea, nickel (Ni) surpassed HRIs larger than 1, indicating a significant health risk connected to these veggies' ingestion.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100044"},"PeriodicalIF":0.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142076978","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 and characterization of novel CS-ZnO-Alg polyelectrolyte complex for enhanced removal of Cd(II), Cu(II), and Ni(II) from simulated paint industrial wastewater","authors":"Durga Yadav,&nbsp;Joydeep Dutta","doi":"10.1016/j.colsuc.2024.100043","DOIUrl":"10.1016/j.colsuc.2024.100043","url":null,"abstract":"<div><p>In this study, we developed and characterized a novel chitosan-alginate-based polyelectrolyte complex impregnated with zinc oxide nanoparticles (CS-ZnO-Alg PEC) for the enhanced removal of Cd(II), Cu(II), and Ni(II) from simulated paint industrial wastewater. The prepared PEC was characterized by X-ray Diffraction (XRD), Fourier-Transform Infrared (FTIR) Spectroscopy, Scanning Electron Microscopy/Energy Dispersive Spectroscopy (SEM/EDS), X-ray Photoelectron Spectroscopy (XPS), Brunauer-Emmett-Teller (BET), and Thermogravimetric analysis/Differential Thermal Analysis (TGA/DTA). The equilibrium data for said metal ions was best appropriated by Freundlich isotherm with maximum adsorption capacity of 217.72 mg/g for Cd(II), 130.41 mg/g Cu(II), and 159.06 mg/g for Ni(II), illustrating the multilayer adsorption of metal ions on the heterogeneous surface sites of the adsorbent. The kinetics of all three metal ions adsorption process onto discussed PEC was consistent with pseudo-second-order model. The thermodynamics results illustrate exothermic and spontaneous processes for Cd(II) (ΔH° = −3.57 KJ/mol, ΔS° = 0.009 KJ/mol*K, ΔG° = −6.42 to −6.61 KJ/mol) and Cu(II) (ΔH° = −3.32 KJ/mol, ΔS° = 0.006 KJ/mol*K, ΔG° = −5.25 to −5.37 KJ/mol), and spontaneous but less favorable adsorption for Ni(II) (ΔH° = −0.82 KJ/mol, ΔS° = −0.001 KJ/mol*K, ΔG° = −0.39 to −0.36 KJ/mol). Notably, the PEC could be easily recycled and regenerated, maintaining adsorption efficiency after five cycles. Overall, the CS-ZnO-Alg PEC, due to its amphoteric nature, high adsorption efficiency, cost-effectiveness, excellent recyclability, and biodegradability, could be a promising adsorbent for paint industrial wastewater.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100043"},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141693758","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":"Construction of coal fly ash-based spherical grain adsorbents and their adsorption characteristics on phenolic compounds","authors":"Xiaoya Jia ,&nbsp;Yongjun Liu ,&nbsp;Zhuangzhuang Yang ,&nbsp;Aining Zhang ,&nbsp;Pan Liu ,&nbsp;Zhe Liu","doi":"10.1016/j.colsuc.2024.100042","DOIUrl":"10.1016/j.colsuc.2024.100042","url":null,"abstract":"<div><p>Addressing the significant emissions and severe pollution hazards posed by coal fly ash waste in the coal chemical industry, as well as the challenges in recovering phenolic substances from coal chemical wastewater, this study utilized coal fly ash as a raw material to construct two types of spherical grain adsorbents: coal fly ash and coal gangue spherical grain (CFAGsg) and coal fly ash and pyrite spherical grain (CFAPsg). The adsorption performance of CFAGsg and CFAPsg towards phenolic substances in coal chemical wastewater was investigated. The research results demonstrated that CFAGsg and CFAPsg exhibited adsorption capacities of 20.31 mg/L and 30.42 mg/L for phenol, respectively, and maintained stable adsorption performance even after multiple regeneration cycles. Further analysis using kinetic, isotherm, and thermodynamic models, along with various characterization techniques, revealed that the adsorption of phenol onto CFAGsg and CFAPsg was primarily governed by physical and chemical adsorption, involving an endothermic reaction. Moreover, the study on the adsorption mechanism of phenol revealed that the adsorption behavior of CFAGsg and CFAPsg was mainly driven by pore filling, π-π stacking, and hydrogen bonding. Additionally, hydrophobic interactions were involved in the adsorption of phenol onto CFAGsg, while surface complexation forces played a role in the adsorption of phenol onto CFAPsg. Overall, the research findings provide vital theoretical support and practical application prospects for the high-value utilization of coal fly ash and the clean production of the coal chemical industry.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100042"},"PeriodicalIF":0.0,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141691700","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":"Engineering multi-level structured electrospun nanofiber Janus membrane for direct contact membrane distillation","authors":"Yiqiao Xie ,&nbsp;Ling Yu ,&nbsp;Zhi Chen ,&nbsp;Yang Yu","doi":"10.1016/j.colsuc.2024.100041","DOIUrl":"https://doi.org/10.1016/j.colsuc.2024.100041","url":null,"abstract":"<div><p>The membrane distillation (MD) has been considered as an attractive technique for the desalination and water treatments. However, the membrane with the superhydrophobic surface is still urgently needed for the wide application of MD process. Inspired by nature, the membranes with the highly porous structure have been fabricated by electrospinning to enhance the water vapor permeation in MD process. In this work, a hydrophobic layer with the hierarchical reentrant architecture was fabricated by electrostatically depositing silicon dioxide (SiO₂) nanoparticles on the surface of polyvinylidenefluoride electrosprayed layer followed by the fluorination treatment. The properties of hydrophobic layers were evaluated by varying the electrospraying time and SiO₂ loading amount. The optimal membrane had a water contact angle value of 145.7° and surface roughness of ∼275 nm, demonstrating a water flux of 21.2 L^.m^−2.h⁻¹ and superior salt rejection of &gt;99.9 % when 3.5 wt% NaCl solution was used as the feed solution and the temperature difference was set as 40 °C. The membrane showed an excellent operation stability and effective mitigation in scaling and fouling tendency. The prepared membrane could be applied as a good candidate for the MD-based water treatment processes.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100041"},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141484392","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":"The modified pomegranate peel as an economical and highly effective adsorbent for malachite green dye removal from wastewater","authors":"Farzaneh Abbasi ,&nbsp;Mohsen Mansouri ,&nbsp;Marjan Tanzifi ,&nbsp;Farbod Ebrahimi ,&nbsp;Amin Sadeghizadeh","doi":"10.1016/j.colsuc.2024.100040","DOIUrl":"https://doi.org/10.1016/j.colsuc.2024.100040","url":null,"abstract":"<div><p>This research investigated the ability of acid-modified pomegranate peel to remove malachite green (MG) dye from aqueous solutions. Pomegranate peel, an abundant agricultural byproduct, was modified using hydrochloric acid to enhance its adsorption capacity. The effects of parameters like particle size, pH, initial MG concentration, contact time, temperature and adsorbent dosage on the dye removal efficiency were studied. Under optimized conditions of pH 8, 40 min contact time, 25°C temperature and 0.01 g/ml adsorbent dose with 5 mg/L MG solution, about 96.8 % dye removal was achieved. Kinetic data fitted well to the pseudo-second order model, indicating chemisorption with electrostatic interactions governing the adsorption. Equilibrium data were best described by the Temkin isotherm model, suggesting a heterogeneous binding energy distribution. Thermodynamic calculations revealed the exothermic and spontaneous nature of MG adsorption. FTIR analysis confirmed introduction of functional groups like carboxyl, amine and alkyl groups on the adsorbent surface after acid modification, enabling interactions with dye cations. SEM images displayed increased surface roughness and porosity for the modified biosorbent relative to the raw form. The acid-modified pomegranate peel proved to be an economical, eco-friendly and effective adsorbent for removing the hazardous cationic dye MG from wastewater. The findings support agricultural waste valorization for environmental remediation applications.</p></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100040"},"PeriodicalIF":0.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949759024000155/pdfft?md5=3595ec08b0ffb8f850b865de36059478&pid=1-s2.0-S2949759024000155-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141484417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}