Colloids and Surfaces C: Environmental Aspects最新文献

Magnesium germanium oxide hydrate nanowires with outstanding surface stability for selective cationic dye removal 氧化镁锗水合物纳米线具有优异的表面稳定性，用于选择性阳离子染料去除

Colloids and Surfaces C: Environmental Aspects Pub Date : 2025-07-17 DOI: 10.1016/j.colsuc.2025.100076

Yihong Liu , Katie Buchel , Ruoxin Deng , Lijia Liu

{"title":"Magnesium germanium oxide hydrate nanowires with outstanding surface stability for selective cationic dye removal","authors":"Yihong Liu , Katie Buchel , Ruoxin Deng , Lijia Liu","doi":"10.1016/j.colsuc.2025.100076","DOIUrl":"10.1016/j.colsuc.2025.100076","url":null,"abstract":"<div><div>Physical adsorption is one of the most promising methods for organic dye removal in wastewater. However, existing adsorbent materials lack a combination of selectivity, efficiency, stable performance over a wide pH range, and reusability after repeated regeneration. In this work, we presented a novel adsorbent, magnesium germanium oxide hydrate (MGOH) nanowires. Utilizing electrochemical and acid-base titration methods, we found that MGOH possesses a unique crystal structure that is rich in hydroxyl (-OH) groups. These -OH groups keep the surface of MGOH negatively charged over a wide pH range from 0 to 10.6, which hasn’t been achieved by any adsorbent to date. Using rhodamine B (RhB) as a model cationic dye, we demonstrated that a 97.4 % removal efficiency can be achieved within 15 min in contact with MGOH at room temperature. The adsorption selectivity of MGOH toward cationic dyes was further demonstrated by effective removal of target dyes in dye mixtures. In addition, MGOH can be easily regenerated through solvent washing and thermal annealing for multiple cycles without losing its adsorption capability.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"3 ","pages":"Article 100076"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654910","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}

引用次数: 0

A high interfacial activity system with temperature resistance and salt tolerance from bio-based surfactants through interaction 生物基表面活性剂通过相互作用，形成具有耐高温、耐盐性能的高界面活性体系

Colloids and Surfaces C: Environmental Aspects Pub Date : 2025-07-08 DOI: 10.1016/j.colsuc.2025.100075

Lei Wu , Jianqiao Lang , Shizhong Yang , Bozhong Mu

{"title":"A high interfacial activity system with temperature resistance and salt tolerance from bio-based surfactants through interaction","authors":"Lei Wu , Jianqiao Lang , Shizhong Yang , Bozhong Mu","doi":"10.1016/j.colsuc.2025.100075","DOIUrl":"10.1016/j.colsuc.2025.100075","url":null,"abstract":"<div><div>The development of ultra-low interfacial tension systems is an important direction for enhanced oil recovery (EOR). However, the construction of alkali-free ultra-low interfacial tension systems that are both temperature-resistant and salt-tolerant faces significant challenges. Based on the surface tension before and after the mixing of bio-based surfactants, the intermolecular interaction parameter <em>β</em><sup>m</sup> was calculated using the regular solution theory. The results demonstrated a synergistic effect between N,N-dimethyl-N-[2-hydroxy-3-sulfo-propyl]-N-benzyloxyoctadecanoyl-1,3-propanediamine (SPBOPA) and lauric acid diethanolamide (LDEA) surfactant molecules. Furthermore, owing to the chain length compatibility between SPBOPA and LDEA, an ultra-low interfacial tension system without extra alkali addition was constructed. This bio-based surfactant system exhibits excellent interfacial property within a relatively broad concentration range (0.10–3.0 g/L) and ratio range (4:6–8:2), with the oil-water interfacial tension (IFT) being significantly reduced to ultra-low levels (<10<sup>−2</sup> mN/m). The system can withstand temperatures up to 120 °C, with sodium chloride tolerance increased from 50 g/L to 100 g/L and calcium ions tolerance increased from 500 mg/L to 5000 mg/L at specific concentrations and ratios. The bio-based surfactants system exhibits excellent temperature and salt resistance. Therefore, this binary system is expected to be applicable to oil displacement systems in high-temperature and high-salinity reservoirs.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"3 ","pages":"Article 100075"},"PeriodicalIF":0.0,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587956","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}

引用次数: 0

Boosting the photocatalytic efficiency of g-C3N4 for effective removal of RhB and MB from aqueous medium 提高g-C3N4光催化效率，有效去除水中介质中的RhB和MB

Colloids and Surfaces C: Environmental Aspects Pub Date : 2025-06-22 DOI: 10.1016/j.colsuc.2025.100074

Mohamed Masri , Girisha K. B , Abdo Hezam , Khaled Alkanad , Talal F. Qahtan , Qasem A. Drmosh , Faten Masri , Kalappa Prashantha , Manjunath S. H , Sanaa Mohammed Abdu Kaid , Udayabhanu , K. Byrappa

{"title":"Boosting the photocatalytic efficiency of g-C3N4 for effective removal of RhB and MB from aqueous medium","authors":"Mohamed Masri , Girisha K. B , Abdo Hezam , Khaled Alkanad , Talal F. Qahtan , Qasem A. Drmosh , Faten Masri , Kalappa Prashantha , Manjunath S. H , Sanaa Mohammed Abdu Kaid , Udayabhanu , K. Byrappa","doi":"10.1016/j.colsuc.2025.100074","DOIUrl":"10.1016/j.colsuc.2025.100074","url":null,"abstract":"<div><div>Due to the adverse consequences the presence of dyes in the aquatic system poses on the ecosystem and human health, a major body of research has been dedicated to tackle the issue of degrading such contaminants. The utilization of sustainable energy technology, namely photocatalysis, in the removal of such contaminants proved to achieve relatively positive advances in the field of water treatment. The present study employed the combustion method for the synthesis of graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>). Diverse characterization studies were employed, including XRD, SEM, and FTIR to confirm the successful fabrication of g-C<sub>3</sub>N<sub>4</sub>. Results showed that the band gap was 2.67 eV with 473 nm adsorption of visible light, and appropriate positions of valence and conduction bands. This renders the prepared material a suitable one to be employed as a visible-light-responsive catalyst for the degradation of Rhodamine B (RhB) and Methylene Blue (MB). Results demonstrated that the removal of RhB (90 %) was slightly better than that of MB (87 %) within 150 min under visible light. The optimal degradation performance reached 95 % at catalyst dosage of 0.02 and 0.03 g/L for RhB and MB, respectively. The current research work advocates the potential of improving the morphology of g-C<sub>3</sub>N<sub>4</sub> through a two-step heating process for the purpose of optimizing this catalyst to attain better photocatalytic performance regarding contaminant degradation.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"3 ","pages":"Article 100074"},"PeriodicalIF":0.0,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144364410","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}

引用次数: 0

Optimizing phosphorus recovery from an acidic pulp stream with cobalt ferrite nanoparticles: A methodology for pulp mills 利用钴铁氧体纳米颗粒优化从酸性纸浆流中回收磷：纸浆厂的一种方法

Colloids and Surfaces C: Environmental Aspects Pub Date : 2025-06-19 DOI: 10.1016/j.colsuc.2025.100073

C.E.D. Cardoso , J.C. Almeida , J. Rocha , E. Pereira

{"title":"Optimizing phosphorus recovery from an acidic pulp stream with cobalt ferrite nanoparticles: A methodology for pulp mills","authors":"C.E.D. Cardoso , J.C. Almeida , J. Rocha , E. Pereira","doi":"10.1016/j.colsuc.2025.100073","DOIUrl":"10.1016/j.colsuc.2025.100073","url":null,"abstract":"<div><div>Phosphate, a critical resource essential for agriculture and industry, faces a rising demand that outpaces population growth. The European Union's classification of phosphate as a critical raw material since 2011 highlights its significance and the region's dependence on imports. To address this challenge, our study aims to enhance phosphorus recovery from real industrial effluents utilizing cobalt ferrite nanoparticles. We employed the design of experiments along with response surface methodology to optimize the phosphorus recovery process and identify the most influential factors. The optimal conditions for achieving over 80 % phosphorus recovery from a 25 mg P/L solution were found to be either a sorbent dose of 3.5 g/L with a 15-minute contact time or a 2.5 g/L dose with 1 h if exposure, both at pH 6 and 60 ºC. Additionally, this study demonstrates that reusing nanoparticles in multiple 15-minute sorption cycles yielded higher phosphorus recovery compared to a continuous 1-hour cycle. This approach offers an effective and eco-friendly way to recover phosphorus from pulp mill effluents, reducing environmental impact and providing a valuable resource for the future, thereby contributing to the circular economy of phosphorus.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"3 ","pages":"Article 100073"},"PeriodicalIF":0.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491425","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}

引用次数: 0

Ag-decorated Al2O3-CeO2 spherical composite as an efficient adsorbent for removal of ciprofloxacin in aqueous media ag修饰Al2O3-CeO2球形复合材料对水中环丙沙星的高效吸附

Colloids and Surfaces C: Environmental Aspects Pub Date : 2025-05-31 DOI: 10.1016/j.colsuc.2025.100072

Lorenzo Iván Salamanca-Córdoba , Pamela Nair Silva-Holguín , Félix Antonio Naranjo-Castañeda , Erasto Armando Zaragoza-Contreras , Refugio Rodríguez-Vázquez , Simón Yobanny Reyes-López

{"title":"Ag-decorated Al2O3-CeO2 spherical composite as an efficient adsorbent for removal of ciprofloxacin in aqueous media","authors":"Lorenzo Iván Salamanca-Córdoba , Pamela Nair Silva-Holguín , Félix Antonio Naranjo-Castañeda , Erasto Armando Zaragoza-Contreras , Refugio Rodríguez-Vázquez , Simón Yobanny Reyes-López","doi":"10.1016/j.colsuc.2025.100072","DOIUrl":"10.1016/j.colsuc.2025.100072","url":null,"abstract":"<div><div>The search for ceramic materials with chemical stability, mechanical resistance, and high adsorption capacity has led to the proposal of several structural modifications, such as combining two oxides in a single material, and surface modifications, such as incorporating metallic nanoparticles upon the surface of a ceramic material. This study presents the synthesis, characterization, and adsorption capacity of ciprofloxacin of porous spherical composites of Al₂O₃, Al₂O₃-CeO₂ and Al₂O₃-CeO₂-Ag. Polystyrene (PS) nanospheres were employed as a sacrificial template to enhance porosity, and silver nanoparticles (Ag-Nps) were used for surface decoration. The phase transformations of Al₂O₃ and CeO₂ into their stable crystalline forms were confirmed through FTIR and XRD analysis. Scanning electron microscopy (SEM) revealed a homogeneous polycrystalline morphology, while zeta potential (pζ) analysis indicated an increase in negative surface charge, reaching values of −87 mV for Ag-decorated spheres at pH 5. Adsorption studies demonstrated ciprofloxacin removal capacities of 0.25 mg g⁻¹ for Al₂O₃, 1.02 mg g⁻¹ for Al₂O₃-CeO₂ and 0.39 mg g⁻¹ for Al₂O₃-CeO₂-Ag at pH 5. Kinetic analyses fit well to pseudo-second-order and Elovich models, with determination coefficients ranging from 0.89 to 0.99, due to a mixed chemisorption mechanism. Freundlich and Temkin models confirmed the affinity of the three materials for ciprofloxacin, with Freundlich coefficients exceeding 1.0 and Temkin adsorption heats exceeding 26,000 J mol<sup>−1</sup>, findings that highlight the potential of Al₂O₃, Al₂O₃-CeO₂ and Al₂O₃-CeO₂-Ag as efficient adsorbent materials for pharmaceutical contaminants, like ciprofloxacin, in water treatment applications.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"3 ","pages":"Article 100072"},"PeriodicalIF":0.0,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212461","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}

引用次数: 0

rGO/NF as anode electrocatalytically activates persulfate combined coagulation process for tetracycline hydrochloride wastewater removal 还原氧化石墨烯/纳滤膜作为阳极电催化激活过硫酸盐联合混凝工艺去除盐酸四环素废水

Colloids and Surfaces C: Environmental Aspects Pub Date : 2025-05-12 DOI: 10.1016/j.colsuc.2025.100071

Linglong Li , Yonggang Zhang

{"title":"rGO/NF as anode electrocatalytically activates persulfate combined coagulation process for tetracycline hydrochloride wastewater removal","authors":"Linglong Li , Yonggang Zhang","doi":"10.1016/j.colsuc.2025.100071","DOIUrl":"10.1016/j.colsuc.2025.100071","url":null,"abstract":"<div><div>In this paper, reduced graphene oxide-modified nickel foam (rGO/NF) was utilised as an activator for peroxymonosulfate (PMS) in the electrocatalytic oxidation reaction and combined with a coagulation process to form the combined system of E-rGO/NF-PMS and coagulation in order to improve the pollutant degradation efficiency and shorten the reaction residence time. Various analytical methods were employed to characterise the electrode materials and the formed flocs in detail, and the effects of key parameters, such as applied voltage, PMS dosage, pH, and coagulant dosage, on the whole system were investigated by orthogonal experimental design. The results showed that the coagulation performance of the wastewater was enhanced by the electrocatalytic oxidation treatment, and tetracycline hydrochloride was effectively degraded by the addition of coagulant through adsorption of electro-neutralisation and net trapping and sweeping, and the concentration and chemical oxygen demand (COD) removal were 97.19 % and 91.97 %, respectively. In addition, the intermediate products generated from the degradation of pollutants were analysed in depth by using electron spin resonance (ESR), liquid chromatography-mass spectrometry (LC-MS), Fourier transform infrared spectroscopy (FTIR) and other techniques, focusing on the mechanism of action and degradation pathway of the combined coagulation process of electrocatalysis. In conclusion, the combined system of E-rGO/NF-PMS and coagulation overcame the shortcomings of long electrocatalytic oxidation time and coagulation time, and poor COD treatment effect, and provided new ideas and technical references for the future practical wastewater treatment engineering.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"3 ","pages":"Article 100071"},"PeriodicalIF":0.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072054","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}

引用次数: 0

Bimetallic MOFs for the effective removal of organic contaminants: Dyes and antibiotics 用于有效去除有机污染物：染料和抗生素的双金属mof

Colloids and Surfaces C: Environmental Aspects Pub Date : 2025-04-14 DOI: 10.1016/j.colsuc.2025.100070

Pamthingla Ragui , Anita Yadav , Shalu Goyal , Swati Rani , Vijay Kumar Goel , Rakesh Kumar Sharma

{"title":"Bimetallic MOFs for the effective removal of organic contaminants: Dyes and antibiotics","authors":"Pamthingla Ragui , Anita Yadav , Shalu Goyal , Swati Rani , Vijay Kumar Goel , Rakesh Kumar Sharma","doi":"10.1016/j.colsuc.2025.100070","DOIUrl":"10.1016/j.colsuc.2025.100070","url":null,"abstract":"<div><div>We report the successful solvothermal synthesis of Iron-Nickel bimetallic MOFs (F:N@BTC) as a heterogeneous catalyst without high-temperature annealing. F:N@BTC demonstrated superior catalytic activity in the removal of Organic Contaminants (OCs) attributed to the synergistic effects of two metals (Fe-Ni), high specific surface area (673 m<sup>2</sup> g<sup>−1</sup>), and mesoporous structure. The negatively charged surface of F:N@BTC (zeta potential ∼-30 mV) enhances adsorption, particularly for the cationic OCs. The adsorption capacity (q<sub>e</sub>, mg g<sup>−1</sup>) of F:N@BTC for OCs follows the order: Toluidine Blue (TB, 962) > Rhodamine B (RB, 842) > Ciprofloxacin (CF, 808) > Nalidixic acid (NA, 616) > Rose Bengal (RoB, 595) within 2 hours without using reducing agent. This result indicates the order of higher adsorption capacity towards cationic to anionic surface charge of the OCs. Comparative studies confirm F:N@BTC’s superiority over monometallic analogs (F@BTC, N@BTC). Kinetic analysis reveals the adsorption of OCs on F:N@BTC followed pseudo-second-order kinetics indicating chemisorption with intraparticle diffusion contributing co-operatively. This work highlights the potential of F:N@BTC MOFs as an efficient adsorbent for the wastewater treatment across diverse Organic Contaminants.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"3 ","pages":"Article 100070"},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838535","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}

引用次数: 0

Nanofiltration membranes containing CHA zeolite with pompom-like morphology 含CHA沸石的纳滤膜，具有球团状形态

Colloids and Surfaces C: Environmental Aspects Pub Date : 2025-04-10 DOI: 10.1016/j.colsuc.2025.100069

Shengchao Wei , Alexander J. Cunliffe , James Redfern , Hailing Guo , Lubomira Tosheva

{"title":"Nanofiltration membranes containing CHA zeolite with pompom-like morphology","authors":"Shengchao Wei , Alexander J. Cunliffe , James Redfern , Hailing Guo , Lubomira Tosheva","doi":"10.1016/j.colsuc.2025.100069","DOIUrl":"10.1016/j.colsuc.2025.100069","url":null,"abstract":"<div><div>Thin-film composite (TFC) nanofiltration membranes are widely used for water treatment due to their energy efficiency and high salt rejection, however they are highly susceptible to biological fouling. CHA zeolite with pompom-like morphology was prepared from an organic structure-directing template-free synthesis gel in the presence of sodium and cesium. The zeolite was added to the polyamide (PA) layer of TFC membranes prepared via interfacial polymerization. M-0.01 and M-0.05 TFC membranes prepared with addition of 0.01 wt% and 0.05 wt% CHA zeolite to the aqueous piperazine monomer solution, displayed a thinner PA layer and higher permeability compared to zeolite-free M-0 membranes. The rejection of 2000 ppm Na<sub>2</sub>SO<sub>4</sub> and MgSO<sub>4</sub> solutions of the M-0.05 membrane was slightly reduced compared to M-0 and M-0.01 but nevertheless remained higher than 90%. Ag-CHA zeolite suspensions showed antibacterial activity against <em>Escherichia coli</em>, whereas CHA zeolite was inactive. Following bacterial exposure, M-0 control membranes exhibited bacterial growth after 24 h compared to the 0 h count, which was not observed for M-0.05 membranes, where there was no significant difference in the count between 0 h and 24 h. As a bacterial population reduction was not observed in either case, these materials are considered not to be antimicrobial. No bacteria survived on the surface of Ag-treated M-0 and M-0.05 membranes, demonstrating antimicrobial activity. The methodology described in this work could be used to increase the resistance of TFC membranes to biological fouling and increase their operational lifetime.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"3 ","pages":"Article 100069"},"PeriodicalIF":0.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828854","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}

引用次数: 0

Microorganism research advances from a novel bibliometric method 微生物研究从一种新的文献计量方法中取得进展

Colloids and Surfaces C: Environmental Aspects Pub Date : 2025-04-07 DOI: 10.1016/j.colsuc.2025.100068

Shan Chen , Yuanzhao Ding

引用次数: 0

Transport and retention of titanium dioxide nanoparticles in a drinking water treatment plant. Effects of coagulation, filtration and raw water properties on the removal efficiency 二氧化钛纳米颗粒在饮用水处理厂的运输和滞留。混凝、过滤和原水性质对去除率的影响

Colloids and Surfaces C: Environmental Aspects Pub Date : 2025-04-05 DOI: 10.1016/j.colsuc.2025.100067

Lina Ramirez-Arenas , Robin Noyer , Stéphan Ramseier Gentile , Stéphane Zimmermann , Pauline Perdaems , Pascal Ramaciotti , Wei Liu , Serge Stoll

{"title":"Transport and retention of titanium dioxide nanoparticles in a drinking water treatment plant. Effects of coagulation, filtration and raw water properties on the removal efficiency","authors":"Lina Ramirez-Arenas , Robin Noyer , Stéphan Ramseier Gentile , Stéphane Zimmermann , Pauline Perdaems , Pascal Ramaciotti , Wei Liu , Serge Stoll","doi":"10.1016/j.colsuc.2025.100067","DOIUrl":"10.1016/j.colsuc.2025.100067","url":null,"abstract":"<div><div>Increasing the use and release of titanium dioxide nanoparticles (TiO<sub>2</sub> NPs) into aquatic systems, including water compartments used to produce drinking water, represent a risk for human health through direct NPs ingestion. Since drinking water treatment plants (DWTPs) must provide and guarantee the quality of the water for human consumption, in this study, TiO<sub>2</sub> NPs removal efficiency of a DWTP which provides drinking water for half million consumers is investigated. For that purpose, a pilot-scale designed to closely reproduce each treatment process of the main DWTP is considered. Experiments were first conducted without considering the coagulation process to evaluate the efficiency of the filtration processes (sand and granular activated carbon) and the specific impact of the coagulation with Polyaluminum Chloride on NPs removal. Using an original and novel combination of different analytical techniques (turbidity, ζ-potentials, size distribution measurements, electron microscopy, total organic carbon determination) we found that filtration processes through sand and GAC achieve an overall NPs removal of 96.3 % ± 1.0. NPs removal is mainly attributed to straining and adsorption processes during filtration. Then experiments were conducted in presence of PACl to quantify the impact of coagulation on the TiO<sub>2</sub> NPs removal efficiency. It was found that the addition of coagulant significantly improves TiO<sub>2</sub> NPs removal with a global removal efficiency greater than 99.5 % ± 0.5. The higher removal efficiency in presence of coagulant was related to a significant TiO<sub>2</sub> NPs surface charge reduction and subsequent formation of aggregates increasing their retention and attachment in the filter media.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"3 ","pages":"Article 100067"},"PeriodicalIF":0.0,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807657","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}

引用次数: 0