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Medellín-Castillo NA, González-Fernández LA, Ocampo-Pérez R, Leyva-Ramos R, Luiz-Dotto G, Flores-Ramírez R, Navarro-Frómeta AE, Aguilera-Flores MM, Carrasco-Marín F, Hernández-Mendoza H, Aguirre-Contreras S, Sánchez-Polo M, Ocaña-Peinado FM. Efficient removal of triclosan from water through activated carbon adsorption and photodegradation processes. ENVIRONMENTAL RESEARCH 2024; 246:118162. [PMID: 38218517 DOI: 10.1016/j.envres.2024.118162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/29/2023] [Accepted: 01/07/2024] [Indexed: 01/15/2024]
Abstract
This study investigated the application of adsorption with activated carbons (ACs) and photodegradation to reduce the concentration of triclosan (TCS) in aqueous solutions. Concerning adsorption, ACs (Darco, Norit, and F400) were characterised and batch experiments were performed to elucidate the effect of pH on equilibrium. The results showed that at pH = 7, the maximum adsorption capacity of TCS onto the ACs was 18.5 mg g-1 for Darco, 16.0 mg g-1 for Norit, and 15.5 mg g-1 for F400. The diffusional kinetic model allowed an adequate interpretation of the experimental data. The effective diffusivity varied and increased with the amount of TCS adsorbed, from 1.06 to 1.68 × 10-8 cm2 s-1. In the case of photodegradation, it was possible to ensure that the triclosan molecule was sensitive to UV light of 254 nm because the removal was over 80 % using UV light. The removal of TCS increased in the presence of sulfate radicals. It was possible to identify 2,4-dichlorophenol as one of the photolytic degradation products of triclosan, which does not represent an environmental hazard at low concentrations of triclosan in water. These results confirm that the use of AC Darco, Norit, and F400 and that photodegradation processes with UV light and persulfate radicals are effective in removing TCS from water, reaching concentration levels that do not constitute a risk to human health or environmental hazard. Both methods effectively eliminate pollutants with relatively easy techniques to implement.
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Affiliation(s)
- Nahum Andrés Medellín-Castillo
- Faculty of Engineering, Autonomous University of San Luis Potosi, Av. Dr. Manuel Nava No. 8, Zona Universitaria, 78290, San Luis Potosi, SLP, Mexico; Autonomous University of San Luis Potosi, Multidisciplinary Graduate Program in Environmental Sciences, Av. Dr. Manuel Nava 201, Zona Universitaria, 78210, San Luis Potosi, SLP, Mexico
| | - Lázaro Adrián González-Fernández
- Faculty of Engineering, Autonomous University of San Luis Potosi, Av. Dr. Manuel Nava No. 8, Zona Universitaria, 78290, San Luis Potosi, SLP, Mexico; Autonomous University of San Luis Potosi, Multidisciplinary Graduate Program in Environmental Sciences, Av. Dr. Manuel Nava 201, Zona Universitaria, 78210, San Luis Potosi, SLP, Mexico.
| | - Raúl Ocampo-Pérez
- Faculty of Chemical Sciences, Autonomous University of San Luis Potosi, Av. Dr. Manuel Nava No.6, Zona Universitaria, 78210, San Luis Potosi, SLP, Mexico
| | - Roberto Leyva-Ramos
- Faculty of Chemical Sciences, Autonomous University of San Luis Potosi, Av. Dr. Manuel Nava No.6, Zona Universitaria, 78210, San Luis Potosi, SLP, Mexico
| | - Guilherme Luiz-Dotto
- Universidade Federal de Santa Maria, Av. Roraima N° 1000, Cidade Universitária Bairro Camobi, Santa Maria, RS, CEP: 97105-900, Brazil
| | - Rogelio Flores-Ramírez
- Coordination for Innovation and Application of Science and Technology, Av. Sierra Leona #550, Lomas 2a, Sección, 78210, San Luis Potosi, SLP, Mexico
| | - Amado Enrique Navarro-Frómeta
- Technological University of Izucar de Matamoros, De Reforma 168, Campestre La Paz, 74420, Izucar de Matamoros, Puebla, Mexico
| | - Miguel Mauricio Aguilera-Flores
- Autonomous University of San Luis Potosi, Multidisciplinary Graduate Program in Environmental Sciences, Av. Dr. Manuel Nava 201, Zona Universitaria, 78210, San Luis Potosi, SLP, Mexico; National Polytechnic Institute, Blvd. Del Bote 202, Cerro Del Gato Ejido La Escondida, Ciudad Administrativa, 98160, Zacatecas, Mexico
| | | | - Héctor Hernández-Mendoza
- Desert Zones Research Institute, Altair No. 200, Col. Del Llano, 78377, San Luis Potosí, SLP, Mexico
| | - Samuel Aguirre-Contreras
- Faculty of Chemical Sciences, Autonomous University of San Luis Potosi, Av. Dr. Manuel Nava No.6, Zona Universitaria, 78210, San Luis Potosi, SLP, Mexico
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Pinelli F, Piras C, Nogueira LP, Rossi F. On the Sorbent Ability and Reusability of Graphene-Oxide-Chitosan Aerogels for the Removal of Dyes from Wastewater. Gels 2023; 9:gels9020110. [PMID: 36826280 PMCID: PMC9956623 DOI: 10.3390/gels9020110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 02/03/2023] Open
Abstract
One of the most persistent issues affecting people worldwide is water contamination due to the indiscriminate disposal of pollutants, causing severe environmental problems. Dyes are among the most harmful contaminants because of their high chemical stability and consequently difficult degradation. To remove contaminants from water, adsorption is the most widely used and effective method. In this work, we recall the results already published about the synthesis, the characterization and the use of porous graphene-oxide-chitosan aerogels as a sorbent material. Those systems, prepared by mixing GO sheets and CS chains, using APS as a cross-linking agent, and by further lyophilization, were further characterized using nano-computed tomography, supplying more understanding about their micro and nano-structure. Their sorbent ability has been investigated also by the study of their isotherm of adsorption of two different anionic dyes: Indigo Carmine and Cibacron Brilliant Yellow. Those analyses confirmed the potentialities of the aerogels and their affinity for those anionic dyes. Moreover, the possibility of regenerating and reusing the material was evaluated as a key aspect for applications of this kind. The treatment with NaOH, to promote the desorption of adsorbed dyes, and subsequent washing with HCl, to re-protonate the system, ensured the regeneration of the gels and their use in multiple cycles of adsorption with the selected water contaminants.
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Affiliation(s)
- Filippo Pinelli
- Department of Chemistry, Material and Chemical Engineering “Giulio Natta”, Politecnico di Milano, via Mancinelli, 7, 20131 Milan, Italy
| | - Chiara Piras
- Department of Chemistry, Material and Chemical Engineering “Giulio Natta”, Politecnico di Milano, via Mancinelli, 7, 20131 Milan, Italy
| | | | - Filippo Rossi
- Department of Chemistry, Material and Chemical Engineering “Giulio Natta”, Politecnico di Milano, via Mancinelli, 7, 20131 Milan, Italy
- Correspondence: ; Tel.: +39-0223993145
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Mixed Matrix Membranes Adsorbers (MMMAs) for the Removal of Uremic Toxins from Dialysate. MEMBRANES 2022; 12:membranes12020203. [PMID: 35207125 PMCID: PMC8878186 DOI: 10.3390/membranes12020203] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/21/2022] [Accepted: 02/01/2022] [Indexed: 02/01/2023]
Abstract
We developed Mixed Matrix Membrane Adsorbers (MMMAs) formed by cellulose acetate and various sorbent particles (activated carbon, zeolites ZSM-5 and clinoptilolite) for the removal of urea, creatinine and uric acid from aqueous solutions, to be used in the regeneration of spent dialysate water from Hemodialysis (HD). This process would allow reducing the disproportionate amount of water consumed and permits the development of closed-loop HD devices, such as wearable artificial kidneys. The strategy of MMMAs is to combine the high permeability of porous membranes with the toxin-capturing ability of embedded particles. The water permeability of the MMMAs ranges between 600 and 1500 L/(h m2 bar). The adsorption of urea, the limiting toxin, can be improved of about nine times with respect to the pure cellulose acetate membrane. Flow experiments demonstrate the feasibility of the process in a real HD therapy session.
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Fe-TiO2/AC and Co-TiO2/AC Composites: Novel Photocatalysts Prepared from Waste Streams for the Efficient Removal and Photocatalytic Degradation of Cibacron Yellow F-4G Dye. Catalysts 2021. [DOI: 10.3390/catal11101137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Fe-TiO2/AC and Co-TiO2/AC composites were prepared from activated carbon (AC) derived from residues of peanut hulls and TiO2 photocatalyst, electrochemically prepared from titanium scrap, and doped with Fe and Co, respectively. The adsorption capacity and photocatalytic activity of the Fe-TiO2/AC and Co-TiO2/AC composites were studied for removing and degrading Cibacron Yellow F-4G (CYF-4G) from wastewater. Doped ACs were characterized by thermogravimetry (TGA), scanning electron microscopy (SEM), X-ray diffraction (XRD), a new X-ray absorption technique (XRA), and elemental analysis (EA). Interesting relationships were found between SEM, XRA, and TGA data and the doped amount of catalyst on ACs. Optimal dye adsorption was found at a pH of 2.0. The CYF-4G adsorption kinetics are followed according to the pseudo-second order model. The experimental data revealed that the Langmuir model fits better than the Freundlich and Temkin models. A decrease in adsorption capacity was observed when the catalyst dope percentage increased. A removal and degradation efficiency of the dye close to 100% was achieved around 120 min. A synergistic adsorption and photocatalytic degradation effect of the Fe-TiO2/AC and Co-TiO2/AC composites could be observed when adsorption experiments were conducted under simulated visible radiation.
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Kong Q, Wei C, Preis S, Hu Y, Wang F. Facile preparation of nitrogen and sulfur co-doped graphene-based aerogel for simultaneous removal of Cd 2+ and organic dyes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:21164-21175. [PMID: 29770942 DOI: 10.1007/s11356-018-2195-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 04/30/2018] [Indexed: 06/08/2023]
Abstract
The need in simultaneous removal of heavy metals and organic compounds dictates the development of synthetic adsorbents with tailor-made properties. A nitrogen (N) and sulfur (S) co-doped graphene-based aerogel (GBA) modified with 2,5-dithiobisurea was synthesized hydrothermally for simultaneous adsorption of Cd2+ and organic dyes-safranin-O (SO), crystal violet (CV), and methylene blue (MB). 2,5-Dithiobisurea was used as nitrogen and sulfur sources to introduce N and S-containing functional group onto graphene oxide. The adsorption mechanism of GBA towards Cd2+ and organic dyes was studied by Dumwald-Wagner models and the results showed that surface and intraparticle diffusion was the key factor in controlling the rate of adsorption. The maximum adsorption capacities of GBA towards Cd2+, SO, CV, and MB comprised 1.755, 0.949, 0.538, and 0.389 mmol/g in monocomponent system, respectively. Adsorption synergism was observed with respect to Cd2+ in presence of the dyes. The performance of GBA with respect to Cd2+ removal from binary solutions, Cd2+-SO, Cd2+-CV, and Cd2+-MB, was enhanced by the presence of the dyes significantly, while the adsorption capacities towards the dyes were not affected by the presence of Cd2+.
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Affiliation(s)
- Qiaoping Kong
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Chaohai Wei
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, People's Republic of China.
| | - Sergei Preis
- Department of Materials and Environmental Technology, Tallinn University of Technology, 19086, Tallinn, Estonia
| | - Yun Hu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, 510006, People's Republic of China.
| | - Feng Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
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Li Y, Lu X, Yang R, Tong W, Xu L, de Bondelon L, Wang H, Zhu J, Ge Q. Adsorption of berberine hydrochloride onto mesoporous carbons with tunable pore size. RSC Adv 2016. [DOI: 10.1039/c6ra01257d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
TEM image of one mesoporous carbon adsorbent and the adsorption breakthrough curve of berberine hydrochloride on the carbon sample.
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Affiliation(s)
- Yin Li
- Zhejiang Provincial Key Lab for Chem & Bio Processing Technology of Farm Products
- School of Biological and Chemical Engineering
- Zhejiang University of Science and Technology
- Hangzhou 310023
- China
| | - Xiuyang Lu
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- Zhejiang University
- Hangzhou 310027
- China
| | - Ruiqin Yang
- Zhejiang Provincial Key Lab for Chem & Bio Processing Technology of Farm Products
- School of Biological and Chemical Engineering
- Zhejiang University of Science and Technology
- Hangzhou 310023
- China
| | - Weijian Tong
- Zhejiang Provincial Key Lab for Chem & Bio Processing Technology of Farm Products
- School of Biological and Chemical Engineering
- Zhejiang University of Science and Technology
- Hangzhou 310023
- China
| | - Lijun Xu
- Zhejiang Provincial Key Lab for Chem & Bio Processing Technology of Farm Products
- School of Biological and Chemical Engineering
- Zhejiang University of Science and Technology
- Hangzhou 310023
- China
| | - Lucas de Bondelon
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education
- Zhejiang University
- Hangzhou 310027
- China
| | - Hongpeng Wang
- Zhejiang Provincial Key Lab for Chem & Bio Processing Technology of Farm Products
- School of Biological and Chemical Engineering
- Zhejiang University of Science and Technology
- Hangzhou 310023
- China
| | - Ju Zhu
- Zhejiang Provincial Key Lab for Chem & Bio Processing Technology of Farm Products
- School of Biological and Chemical Engineering
- Zhejiang University of Science and Technology
- Hangzhou 310023
- China
| | - Qing Ge
- Zhejiang Provincial Key Lab for Chem & Bio Processing Technology of Farm Products
- School of Biological and Chemical Engineering
- Zhejiang University of Science and Technology
- Hangzhou 310023
- China
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