1
|
Coetzee D, Rojviroon T, Niamlang S, Militký J, Wiener J, Večerník J, Melicheríková J, Müllerová J. Effects of expanded graphite's structural and elemental characteristics on its oil and heavy metal sorption properties. Sci Rep 2024; 14:13716. [PMID: 38877151 PMCID: PMC11178900 DOI: 10.1038/s41598-024-64695-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 06/12/2024] [Indexed: 06/16/2024] Open
Abstract
Expanded graphite has promising potential environmental applications due to its porous structure and oleophilic nature, which allow it to absorb large quantities of oil. The material is produced by intercalating graphite and applying heat to convert the intercalant into gas to cause expansion between the layers in the graphite. Using different intercalants and temperature conditions results in varying properties of expanded graphite. This work has proven that the sorption properties of commercial expanded graphite differ significantly due to the material's structural and elemental characteristics, which can be attributed to the intercalation method. This resulted in various degrees of exfoliation of the graphite and possible functionalisation of the graphene sheets within the structure. This affected the material's sorption capacity and its affinity for heavy metal sorption by incorporating selectivity towards the sorption of certain metals. It was found that sample EG3, which underwent a less harsh expansion, exhibited lower porosity than EG1, and thus, the sample absorbed less oil at 37.29 g/g compared to the more expanded samples EG1 and EG2 with 55.16 g/g and 48.82 g/g, respectively. However, it was able to entrap a wider variety of metal particles compared to EG1 and EG2, possibly due to its smaller cavities allowing for a capillary effect between the graphene sheets and greater Van der Waals forces. A second possibility is that ionic or coordination complexes could form with certain metals due to the possible functionalisation of the expanded graphite during the intercalation process. This would be in addition to coordination between the metals and expanded graphite carbon atoms. The findings suggest that there is evidence of functionalisation as determined by XRD and elemental analyses. However, further investigation is necessary to confirm this hypothesis. The findings in this work suggest that the first mechanism of sorption was more likely to be related to the degree of expansion of the expanded graphite. Various metals are present in used oil, and their removal can be challenging. Some metals in oil are not considered heavy since they have a relatively low density but can be associated with heavy metals in terms of toxicity.
Collapse
Affiliation(s)
- Divan Coetzee
- Department of Materials Engineering, Faculty of Textile Engineering, Technická Univerzita v Liberci, 460 01, Liberec, Czech Republic.
| | - Thammasak Rojviroon
- Department of Civil Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi (RMUTT), Klong 6, Thanyaburi, Pathum Thani, 12120, Thailand
| | - Sumonman Niamlang
- Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi (RMUTT), Klong 6, Thanyaburi, Pathum Thani, 12120, Thailand
| | - Jiři Militký
- Department of Materials Engineering, Faculty of Textile Engineering, Technická Univerzita v Liberci, 460 01, Liberec, Czech Republic
| | - Jakub Wiener
- Department of Materials Engineering, Faculty of Textile Engineering, Technická Univerzita v Liberci, 460 01, Liberec, Czech Republic
| | - Josef Večerník
- Department of Materials Engineering (Laboratory Alšovice), Faculty of Textile Engineering, Technická Univerzita v Liberci, 460 01, Liberec, Czech Republic
| | - Jana Melicheríková
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Bendlova 7, Liberec, 460 01, Czech Republic
| | - Jana Müllerová
- Department of Chemistry, Faculty of Science, Humanities and Pedagogy, Technická Univerzita v Liberci, 460 01, Liberec, Czech Republic
| |
Collapse
|
2
|
Elbidi M, Mohd Salleh MA, Rashid SA, Mukhtar Gunam Resul MF. The potential of thermally expanded graphite in oil sorption applications. RSC Adv 2024; 14:16466-16485. [PMID: 38774609 PMCID: PMC11106605 DOI: 10.1039/d4ra00049h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 03/18/2024] [Indexed: 05/24/2024] Open
Abstract
An oil spill occurs when liquid petroleum hydrocarbons are released into the environment, whether accidentally or intentionally, in substantial quantities. The impact of an oil spill on the ecosystem is significant and should not be underestimated. Various techniques are employed to address oil spills, including mechanical, physical, biological, and physicochemical methods. Among these techniques, adsorption is considered the most suitable approach. Adsorption is promising due to its simplicity, ease of use, high removal capacity, and rapid pollutant removal. An excellent adsorbent material exhibits unique characteristics that enhance its efficacy in liquid adsorption. Sorbents are categorized into synthetic and natural types. Porous carbon materials, especially expanded graphite, are widely utilized in wastewater treatment due to their micropores and exceptional adsorption capacity. The distinctive properties of expanded graphite, including its low density, high porosity, and electrical conductivity, have garnered significant global attention for various potential applications. In essence, expanded graphite offers a powerful and practical approach to oil spill cleanup due to its efficient oil adsorption, selective targeting, ease of use, and potential reusability. This review article summarizes the preparation techniques, structure, and properties of expanded graphite. It also delves into recent advancements in using expanded graphite for oil spill cleanup. The article concludes by outlining potential future directions in this field and discussing the commercial viability of some of these techniques.
Collapse
Affiliation(s)
- Moammar Elbidi
- Sustainable Process Engineering Research Centre (SPERC), Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia
| | - Mohamad Amran Mohd Salleh
- Sustainable Process Engineering Research Centre (SPERC), Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia
- Institute of Nanoscience and Nanotechnology (ION2), Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia
| | - Suraya Abdul Rashid
- Sustainable Process Engineering Research Centre (SPERC), Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia
- Institute of Nanoscience and Nanotechnology (ION2), Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia
| | - Mohamed Faiz Mukhtar Gunam Resul
- Sustainable Process Engineering Research Centre (SPERC), Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia
| |
Collapse
|
3
|
Annam Renita A, Sathish S, Aravind Kumar J, Nagarajan L, Sakthi Kumaran SJ, Sangeeth S. Surface treated Phoenix sylvestris for bioadsorption of oil from aqueous solution: Isotherms and kinetic studies. ENVIRONMENTAL RESEARCH 2022; 209:112836. [PMID: 35104483 DOI: 10.1016/j.envres.2022.112836] [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: 11/21/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
Biosorption is a versatile technique of removing the oil spill - one of the major toxicants that causes water pollution, which threatens the ecological balance of the aquatic ecosystem. The proposed research aims in developing a viable adsorbent from discarded agricultural waste, Phoenix sylvestris, which was surface altered, assessed and utilised as a biosorbent for the effective removal of diesel from aqueous solution in batch adsorption trials. Waste palm leaves, Phoenix sylvestris (RPS)was physically (PMPS) and chemically modified (CMPS) to adsorb diesel in the emulsion. The synthesised materials were characterised by FTIR, SEM, and EDS, confirming a well-defined microporous structure consisting of ionisable groups. The studies indicated optimised conditions of 10 g, 4.5 g and 2 g of RPS, PMPS and CMPS respectively at 303K for an optimised adsorption time of 60 min. Freundlich isotherm agreed well with experimental data, and the kinetic mechanism claimed better results with RPS, PMPS and CMPS for Pseudo first-order model. The adsorbents could be reused five times without much loss of efficiency. From the performed studies, it can be inferred that good adsorption capacities at optimised conditions followed the order of CMPS > PMPS > RPS. Thermodynamic analysis proved the feasibility of such biosorption with exothermic nature predicting spontaneous attraction of oil components to the surface of PMPS and CMPS. Moreover, the density of the CMPS layer rendered proven results for such biosorption displaying a hyperbolic dependency assuring its efficacy. Hence, it can be concluded that the prepared adsorbent from Phoenix sylvestris, an agricultural waste, possess good adsorptive properties.
Collapse
Affiliation(s)
- A Annam Renita
- Department of Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai, 600119, Tamil Nadu, India.
| | - S Sathish
- Department of Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai, 600119, Tamil Nadu, India
| | - J Aravind Kumar
- Department of Biomass and Energy Conversion, Saveetha School of Engineering, SIMATS, Chennai, 602105, Tamil Nadu, India
| | - L Nagarajan
- Department of Chemical Engineering, Sriram Engineering College, Chennai, 602024, Tamil Nadu, India
| | - S J Sakthi Kumaran
- Department of Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai, 600119, Tamil Nadu, India
| | - S Sangeeth
- Department of Chemical Engineering, Sathyabama Institute of Science and Technology, Chennai, 600119, Tamil Nadu, India
| |
Collapse
|
4
|
Tian N, Wu S, Han G, Zhang Y, Li Q, Dong T. Biomass-derived oriented neurovascular network-like superhydrophobic aerogel as robust and recyclable oil droplets captor for versatile oil/water separation. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127393. [PMID: 34656938 DOI: 10.1016/j.jhazmat.2021.127393] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/18/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
Using tubular kapok fibers (KF) and sodium alginate (SA) as the natural building block, we put forward a novel oriented neurovascular network-like superhydrophobic aerogel with robust dry and wet compression resilience by directional freeze-drying and chemical vapor deposition. In the block, SA forms aligned channel structures providing space for rapid oil transmission, while KF serves as vascular-like capillaries acting as instant "tentacle" to capture the tiny oil droplets in water, facilitating fascinating oil capture efficiency for versatile oil/water separation, The aerogel after dry and wet compression (under a strain of 60%) can recover 96.0% and 97.3% its original, respectively, facilitating stable oil recovery (81.1-89.8%) by squeezing, high separation efficiency (99.04-99.64%) and permeation flux separating oil contaminants from water. A pump-supported experiment shows the aerogel efficiently collecting oil contaminants from the water's surface and bottom by 11503-25611 L·m-2·h-1. Particularly, the aerogel as robust oil droplets captor facilely achieves isolation of 99.39-99.68% emulsified oils from oil/water emulsions by novel oil trapping mechanism which simply involves exerting kinetic energy on emulsified oils through repeated oscillation, potentially indicating a simple and efficient alternative to membrane-based oily wastewater remediation via filtration.
Collapse
Affiliation(s)
- Na Tian
- College of Textile and Clothing, Qingdao University, #308 Ningxia Road, Qingdao, PR China; Advanced Medical Care and Protection Technology Research Center, Qingdao University, #308 Ningxia Road, Qingdao, PR China
| | - Shaohua Wu
- College of Textile and Clothing, Qingdao University, #308 Ningxia Road, Qingdao, PR China; Advanced Medical Care and Protection Technology Research Center, Qingdao University, #308 Ningxia Road, Qingdao, PR China
| | - Guangting Han
- College of Textile and Clothing, Qingdao University, #308 Ningxia Road, Qingdao, PR China; Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, #308 Ningxia Road, Qingdao, PR China
| | - Yuanming Zhang
- College of Textile and Clothing, Qingdao University, #308 Ningxia Road, Qingdao, PR China; Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, #308 Ningxia Road, Qingdao, PR China
| | - Qiang Li
- College of Textile and Clothing, Qingdao University, #308 Ningxia Road, Qingdao, PR China; Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, #308 Ningxia Road, Qingdao, PR China
| | - Ting Dong
- College of Textile and Clothing, Qingdao University, #308 Ningxia Road, Qingdao, PR China; Advanced Medical Care and Protection Technology Research Center, Qingdao University, #308 Ningxia Road, Qingdao, PR China; Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, #308 Ningxia Road, Qingdao, PR China.
| |
Collapse
|
5
|
Hou S, Zhu T, Shen W, Kang F, Inagaki M, Huang ZH. Exfoliated graphite blocks with resilience prepared by room temperature exfoliation and their application for oil-water separation. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127724. [PMID: 34799174 DOI: 10.1016/j.jhazmat.2021.127724] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/26/2021] [Accepted: 11/04/2021] [Indexed: 06/13/2023]
Abstract
Exfoliated graphite (EG) blocks are prepared from the ultra-large flakes of graphite by intercalation of H2SO4 using a large amount of H2O2 at 5 °C and following exfoliation at 30 °C. By the exfoliation in a closed container, EG blocks with the bulk densities of 0.008-0.024 g/cm3 are successfully prepared. The resultant EG blocks have high sorption capacities for a diesel oil, up to 45 g/g. The EG blocks after oil sorption can get certain resilience for compressive stress with high reproducibility by compression-release cycles, which allows us to apply the compression-releasing for the oil sorption-desorption of the EG blocks. The performance of cyclic oil sorption-desorption by compression-releasing of EG block is compared with those of filtration and distillation. Since the resultant EG blocks had sufficient mechanical strength, the continuous removal of oil floating on the water surface is possible, exporting oil through a catheter inserted into the block and connected to a peristaltic pump. By warming up by Joule heating, even a crude oil having high viscosity can be continuously removed from the water with sufficient rate. The high hydrophobicity and lipophilicity of EG make selective removal of oil from water possible.
Collapse
Affiliation(s)
- Shiyu Hou
- School of Space and Environment, Beihang University, Beijing 100191, China
| | - Tianle Zhu
- School of Space and Environment, Beihang University, Beijing 100191, China.
| | - Wanci Shen
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Feiyu Kang
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Michio Inagaki
- Hokkaido University, 228-7399 Nakagawa, Hosoe-cho, Kita-ku, Hamamatsu 431-1304, Japan.
| | - Zheng-Hong Huang
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| |
Collapse
|
6
|
A Novel Graphite-Based Sorbent for Oil Spill Cleanup. MATERIALS 2022; 15:ma15020609. [PMID: 35057328 PMCID: PMC8778838 DOI: 10.3390/ma15020609] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/04/2022] [Accepted: 01/11/2022] [Indexed: 11/16/2022]
Abstract
The performance of an innovative material based on expanded graphite, Grafysorber® G+ (Directa Plus), has been tested through laboratory, tank, and confinement tests for oil removal in case of an oil spill and water treatment. In addition to the ability to retain oil, the possibility of reusing this material after regeneration via squeezing was also evaluated. As a comparison, the same experimental tests were conducted using polypropylene flakes (PP), the material currently most used to deal with spill accidents. Oils with different chemical and physical properties were used, namely kerosene, diesel, and crude oil. From the laboratory tests, the capacity of Grafysorber® G+ to retain oil was found to be directly proportional to the viscosity of the latter, with adsorption values ranging from 76.8 g/g for diesel to 50.8 g/g for kerosene, confirming the potential of the innovative material compared to the PP. Cyclical use tests have confirmed certain reusability of the material, even if its adsorbent capacity decreases significantly after the first cycle and continues to decrease in subsequent cycles, but a less marked manner. Finally, some considerations based on the adsorption capacities were found to suggest that the adoption of the new material is also economically preferable, resulting in savings of 20 to 40% per kg of hydrocarbon treated.
Collapse
|
7
|
Nguyen TH, Nguyen V, Ougizawa T, Kawahara S, Cao HH. Electromagnetic shielding material based on hydrogenated natural rubber/expanded graphite blend: Preparation and characterization. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Thu Ha Nguyen
- School of Chemical Engineering Hanoi University of Science and Technology Hanoi Vietnam
| | - Vân‐Anh Nguyen
- School of Chemical Engineering Hanoi University of Science and Technology Hanoi Vietnam
| | - Toshiaki Ougizawa
- Department of Materials Science and Engineering Tokyo Institute of Technology Tokyo Japan
| | - Seiichi Kawahara
- Department of Materials Science and Technology Nagaoka University of Technology Nagaoka Japan
| | - Hong Ha Cao
- School of Chemical Engineering Hanoi University of Science and Technology Hanoi Vietnam
| |
Collapse
|
8
|
Akpomie KG, Conradie J. Enhanced surface properties, hydrophobicity, and sorption behavior of ZnO nanoparticle-impregnated biomass support for oil spill treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:25283-25299. [PMID: 33453027 DOI: 10.1007/s11356-021-12451-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 01/08/2021] [Indexed: 06/12/2023]
Abstract
Metallic nanoparticles (NPs) have gained significant attention in recent years due to their efficiency in the adsorption of water pollutants. Except for magnetic NPs, metallic NPs are rarely used in oil sorption studies, due to the difficulty in recovering the NPs from the treated water. This study reports for the first time the application of ZnONPs for oil spill treatment. The ZnONPs were impregnated onto Musa acuminata peel (MP) support to form a novel material (ZnOMP), which was utilized for the sorption of oil from synthetic oil spills. The as-prepared sorbents were characterized by the SEM, EDS, BET, FTIR, FE-SEM, TGA, and XRD techniques. The presence of 31.32-nm average-sized ZnONPs enhanced the oil uptake characteristics, with clear affinity for the oil phase in comparison to the pristine MP. A maximum sorption capacity of 4.146 g/g and 5.236 g/g was obtained for biosorbents MP and ZnOMP, respectively, which was higher than most reported sorbents. The Freundlich model presented the best fit for the isotherm data, while the pseudo-second-order model was most suited for the kinetics. The presence of competing heavy metal ions in solution did not have any significant effect on the oil sorption capacity onto ZnOMP. The sorption mechanism was attributed to absorption and hydrophobic interactions. ZnONPs impregnated onto the biomass enhanced the spontaneity of oil uptake at higher temperatures. Over 82% desorption of the oil contaminant from the biosorbents was achieved during recovery, using petroleum ether and n-pentane as eluents. Concisely, ZnONPs enhanced the uptake and hydrophobic characteristic of MP biomass and showed good recovery and reusability. Thus, the application of ZnONPs impregnated onto biosorbents in oil spill treatment is highly recommended.
Collapse
Affiliation(s)
- Kovo G Akpomie
- Physical Chemistry Unit, Department of Chemistry, University of the Free State, Bloemfontein, South Africa.
- Department of Pure & Industrial Chemistry, University of Nigeria, Nsukka, Nigeria.
| | - Jeanet Conradie
- Physical Chemistry Unit, Department of Chemistry, University of the Free State, Bloemfontein, South Africa
| |
Collapse
|
9
|
Cuccarese M, Brutti S, De Bonis A, Teghil R, Mancini IM, Masi S, Caniani D. Removal of diclofenac from aqueous solutions by adsorption on thermo-plasma expanded graphite. Sci Rep 2021; 11:3427. [PMID: 33564125 PMCID: PMC7873247 DOI: 10.1038/s41598-021-83117-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 01/12/2021] [Indexed: 01/05/2023] Open
Abstract
The adsorption of diclofenac on thermo-plasma expanded graphite (a commercial product) from water solutions was investigated. The adsorbent material was characterized by SEM, TEM, BET, Raman and X-ray diffraction analyses. Typical diffractogram and Raman spectrum of graphitic material, dimension of 24.02 nm as crystallite dimension and a surface area of 47 m2 g-1 were obtained. The effect of pH on the adsorption capacity was evaluated in the range 1-7 and the adsorption mechanism was described by kinetic and isothermal studies. Pseudo-second order and Dubinin-Radushkevich models agreed with theoretical values of adsorption capacity (i.e. 400 and 433 mg g-1, respectively) and resulted to be the best fit for kinetics and isothermal experimental data. The thermodynamics of the process was evaluated by plotting the adsorption capacity/concentration ratio at the equilibrium as a function of different values of the multiplicative inverse of temperature. Moreover, the adsorbent regeneration was also investigated, comparing two different remediation techniques. Solvent washing performed with NaOH 0.2 M and thermo-treatment carried out by heating in an oven at 105 °C for 2 h and then at 200 °C for 4 h. The thermo-treatment was the best technique to regenerate the adsorbent, ensuring same performance after 4 cycles of use and regeneration.
Collapse
Affiliation(s)
- Marco Cuccarese
- Scuola di Ingegneria, Università degli Studi della Basilicata, viale dell'Ateneo Lucano n.10, 85100, Potenza, Italy.
| | - Sergio Brutti
- Dipartimento di Chimica, Università di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185, Roma, Italy
| | - Angela De Bonis
- Dipartimento di Scienze, Università degli Studi della Basilicata, viale dell'Ateneo Lucano n.10, 85100, Potenza, Italy
| | - Roberto Teghil
- Dipartimento di Scienze, Università degli Studi della Basilicata, viale dell'Ateneo Lucano n.10, 85100, Potenza, Italy
| | - Ignazio Marcello Mancini
- Scuola di Ingegneria, Università degli Studi della Basilicata, viale dell'Ateneo Lucano n.10, 85100, Potenza, Italy
| | - Salvatore Masi
- Scuola di Ingegneria, Università degli Studi della Basilicata, viale dell'Ateneo Lucano n.10, 85100, Potenza, Italy
| | - Donatella Caniani
- Scuola di Ingegneria, Università degli Studi della Basilicata, viale dell'Ateneo Lucano n.10, 85100, Potenza, Italy
| |
Collapse
|
10
|
Vasiliauskienė D, Balčiūnas G, Boris R, Kairytė A, Kremensas A, Urbonavičius J. The Effect of Different Plant Oil Impregnation and Hardening Temperatures on Physical-Mechanical Properties of Modified Biocomposite Boards Made of Hemp Shives and Corn Starch. MATERIALS 2020; 13:ma13225275. [PMID: 33233460 PMCID: PMC7700169 DOI: 10.3390/ma13225275] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/16/2020] [Accepted: 11/19/2020] [Indexed: 11/16/2022]
Abstract
In this study, tung tree and linseed drying oils, as well as semi-drying hempseed oil, were analyzed as the protective coatings for biocomposite boards (BcB) made of hemp shives, corn starch binder, and the performance-enhancing additives. The hydrophobization coatings were formed at 40, 90, and 120 °C temperatures, respectively. The physical-mechanical properties such as the compressive strength, thermal conductivity, dimensional stability, water absorption, and swelling were tested. In addition, scanning electron microscopy (SEM) was employed for the analysis of the board microstructure to visualize the oil fills and impregnation in pores and voids. It was demonstrated that the compressive strength of oil-modified BcBs compared to uncoated BcBs (at 10% of relative deformation) increased by up to 4.5-fold and could reach up to 14 MPa, water absorption decreased up to 4-fold (from 1.34 to 0.37 kg/m2), swelling decreased up to 48% (from 8.20% to 4.26%), whereas the thermal conductivity remained unchanged with the thermal conductivity coefficient of around 0.085 W/m·K. Significant performance-enhancing properties were obtained due to the formation of a protective oil film when the tung tree oil was used.
Collapse
Affiliation(s)
- Dovilė Vasiliauskienė
- Department of Chemistry and Bioengineering, Vilnius Gediminas Technical University, LT-10223 Vilnius, Lithuania;
| | - Giedrius Balčiūnas
- Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, LT-08217 Vilnius, Lithuania; (G.B.); (R.B.); (A.K.); (A.K.)
| | - Renata Boris
- Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, LT-08217 Vilnius, Lithuania; (G.B.); (R.B.); (A.K.); (A.K.)
| | - Agnė Kairytė
- Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, LT-08217 Vilnius, Lithuania; (G.B.); (R.B.); (A.K.); (A.K.)
| | - Arūnas Kremensas
- Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, LT-08217 Vilnius, Lithuania; (G.B.); (R.B.); (A.K.); (A.K.)
| | - Jaunius Urbonavičius
- Department of Chemistry and Bioengineering, Vilnius Gediminas Technical University, LT-10223 Vilnius, Lithuania;
- Correspondence: ; Tel.: +370-52744840
| |
Collapse
|
11
|
Thermal exfoliation of electrochemically synthesized graphite intercalation compound with perrhenic acid. J Solid State Electrochem 2020. [DOI: 10.1007/s10008-020-04642-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
AbstractIn present work, we describe the synthesis of graphite intercalation compounds with perrhenic acid (HReO4-GIC) through the anodic oxidation of graphite in aqueous perrhenic acid solution and their thermal exfoliation. Due to electrochemical treatment of graphite in perrhenic acid solution, ReO4− ions are intercalated into interlayer spaces of graphite. Anodic oxidation of graphite in HReO4 solution leads to the formation of 3-stage GIC. Simultaneously, some amount of perrhenic acid becomes deposited on the graphite surface and edges. In the next step, thermal treatment of the previously synthesized GIC was performed, causing both the exfoliation of graphitic structure and transformation of perrhenic acid into rhenium oxides on the surface of graphene layers. The yielded product was exfoliated graphite-ReO2/ReO3 composite. The obtained composite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. Additionally, specific surface area of the exfoliated materials was measured.
Collapse
|
12
|
Zhang J, Wang A, Yin H. Preparation of graphite nanosheets in different solvents by sand milling and their enhancement on tribological properties of lithium-based grease. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2020.01.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
13
|
Zhai M, Wu M, Wang C, Li X. A novel silica-supported polyether polysiloxane quaternary ammonium demulsifier for highly efficient fine-sized oil droplet removal of oil-in-water emulsions. RSC Adv 2020; 10:18918-18926. [PMID: 35518335 PMCID: PMC9053880 DOI: 10.1039/d0ra01679a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 04/30/2020] [Indexed: 11/25/2022] Open
Abstract
The existence of fine-sized oil drops that are difficult to coalesce greatly decreases the separation efficiency of produced water from alkali, surfactant, and polymer flooding technology (ASP) containing oil-in-water emulsions. To improve oil–water separation efficiency, a silica-supported polyether polysiloxane quaternary ammonium (abbreviated as PPQA@SiO2) demulsifier was synthesized. The supported demulsifier possesses a rough surface structure and large surface area. In addition, it displays high thermal stability. It was applied for treating the produced water from ASP flooding. The effects of dosage, treatment temperature and treatment time on the oil removal efficiency from ASP produced water were investigated. Owing to the synergetic effect of demulsification and adsorption, the supported demulsifier exhibited an oil removal greater than 92% within 50 min at the initial oil concentration of 300 mg L−1, which is much higher than that of a commercial demulsifier SA001 (40.33%). Furthermore, the demulsification mechanism was explored from the perspective of the zeta potential, mean diameter and size distribution of the oil droplets. The high oil removal efficiency establishes PPQA@SiO2 as a promising candidate for oil–water separation from the ASP flooding produced wastewater. The existence of fine-sized oil drops that are difficult to coalesce greatly decreases the separation efficiency of produced water from alkali, surfactant, and polymer flooding technology (ASP) containing oil-in-water emulsions.![]()
Collapse
Affiliation(s)
- Mengjin Zhai
- National Center for Coal Preparation and Purification Engineering Research
- China University of Mining and Technology
- Xuzhou
- PR China
- School of Chemical Engineering and Technology
| | - Mian Wu
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou
- PR China
| | - Cunying Wang
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou
- PR China
- School of Chemical Engineering and Technology
| | - Xiaobing Li
- National Center for Coal Preparation and Purification Engineering Research
- China University of Mining and Technology
- Xuzhou
- PR China
| |
Collapse
|
14
|
Vásquez L, Campagnolo L, Athanassiou A, Fragouli D. Expanded Graphite-Polyurethane Foams for Water-Oil Filtration. ACS APPLIED MATERIALS & INTERFACES 2019; 11:30207-30217. [PMID: 31389689 DOI: 10.1021/acsami.9b07907] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Herein, expanded graphite is successfully combined with waterborne polyurethane to develop porous foams with underwater oleophobic properties for the separation of surfactant-free, oil-in-water mixtures and emulsions. To obtain foams with different pore sizes and therefore with different performances in the oil-water filtration process, two solvent-free fabrication processes are adopted. In the first one, the expanded graphite granules are mixed with the waterborne polyurethane (PUEGr), and in the second method, calcium carbonate is introduced to the two-component mixture (PUEGr_t). In both cases, the obtained foams exhibit hydrophilicity and oleophilicity in air and oleophobicity underwater, and they have porous interconnected networks, while their pore size distribution differs significantly. The foams can be used as 3D filters, able to separate, through gravity, surfactant-free, oil-in-water mixtures (10% w/w oil in water) with high oil rejection efficiencies and flow rates that depend on the type of foam. In particular, in the gravity-driven filtration process using 100 mL of the feed liquid, the PUEGr foams have an oil rejection efficiency of 96.85% and flow rate of 9988 L m-2 h-1, while for the PUEGr_t foams the efficiency is higher (99.99%) and the flow rate is lower (8547 L m-2 h-1) due to their smaller pore size. Although the PUEGr_t foams have slower separation performance, they are more efficient for the separation of surfactant-free emulsions (1% w/w oil in water) reaching an oil rejection efficiency of 98.28%, higher than the 95.66% of the PUEGr foams of the same thickness. The foams can be used for several filtration cycles, as well as in harsh conditions without deteriorating their performance. The nature of raw materials, the simple solvent-free preparation method, the effective gravity-driven filtration even in harsh conditions, and their reusability suggest that the herein engineered foams have great potential for practical applications in oil-water separation through highly energy-efficient filtration.
Collapse
Affiliation(s)
- Lía Vásquez
- Smart Materials , Istituto Italiano di Tecnologia , via Morego 30 , 16163 Genova , Italy
- Dipartimento di Chimica e Chimica Industriale (DCCI) , Università degli Studi di Genova , Via Dodecaneso 31 , 16146 Genova , Italy
| | - Laura Campagnolo
- Smart Materials , Istituto Italiano di Tecnologia , via Morego 30 , 16163 Genova , Italy
- Dipartimento di Chimica e Chimica Industriale (DCCI) , Università degli Studi di Genova , Via Dodecaneso 31 , 16146 Genova , Italy
| | - Athanassia Athanassiou
- Smart Materials , Istituto Italiano di Tecnologia , via Morego 30 , 16163 Genova , Italy
| | - Despina Fragouli
- Smart Materials , Istituto Italiano di Tecnologia , via Morego 30 , 16163 Genova , Italy
| |
Collapse
|
15
|
Enhanced Oil Spill Remediation by Adsorption with Interlinked Multilayered Graphene. MATERIALS 2019; 12:ma12142231. [PMID: 31295967 PMCID: PMC6678742 DOI: 10.3390/ma12142231] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 11/16/2022]
Abstract
The performances of an innovative material based on graphene multilayers in a 3D structure similar to expanded graphite, Grafysorber® G+ (Directa Plus), have been tested via in field applications on a real contaminated site. Several experimental tests were performed using Grafysorber® inside adsorbent devices (booms and pillows) to treat waters polluted by oil. The experimental campaign was carried out with the aim of comparing the performances of Grafysorber® with those of polypropylene (PP), which is the material used worldwide in case of water oil spill clean-up activities. The results achieved have confirmed a considerably higher selective adsorption capacity of Grafysorber® compared to PP, and configure the new material as a promising alternative to standard materials in enhancing oil spill remediation by selective adsorption.
Collapse
|
16
|
Qiu T, Yang JG, Bai XJ, Wang YL. The preparation of synthetic graphite materials with hierarchical pores from lignite by one-step impregnation and their characterization as dye absorbents. RSC Adv 2019; 9:12737-12746. [PMID: 35515865 PMCID: PMC9063670 DOI: 10.1039/c9ra00343f] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 04/01/2019] [Indexed: 12/22/2022] Open
Abstract
Herein, synthetic graphite materials with hierarchical pores and large specific surface area were successfully prepared by one-step impregnation with lignite as the carbon source, sulfuric acid (H2SO4) as the oxidant, and phosphoric acid (H3PO4) as the activator. The microstructural characteristics of synthetic graphite were investigated via X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Moreover, the pore parameters were studied by nitrogen adsorption–desorption. The results showed that synthetic graphite had a perfect orderly layered structure with high graphitization degree and a well-developed multistage pore structure with pore sizes ranging from nanometer to micrometer. The specific surface area and pore volume were 415.29 m2 g−1 and 0.67 cm3 g−1, respectively. The results of Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) showed that the impregnation pretreatment provided polar groups containing oxygen to the surfaces. These unique characteristics make synthetic graphite possess good adsorption capacity for dye pollutants (the adsorption rate of the methyl orange solution was 99.9% within 60 min at 50 °C, and the pH value of the solution was 3). The effects of temperature and pH value on the adsorption capacity were studied. The repeatability of the adsorption performance was also tested, and the adsorption rate was 84.6% of the initial adsorption rate after five cycles. Herein, synthetic graphite materials with hierarchical pores and large specific surface area were prepared by one-step impregnation with lignite as the carbon source, H2SO4 as the oxidant, and H3PO4 as the activator.![]()
Collapse
Affiliation(s)
- Tian Qiu
- National Engineering Research Center of Coal Preparation and Purification
- China University of Mining and Technology
- Xuzhou
- China
- School of Chemical Engineering and Technology
| | - Jian-Guo Yang
- National Engineering Research Center of Coal Preparation and Purification
- China University of Mining and Technology
- Xuzhou
- China
- School of Chemical Engineering and Technology
| | - Xue-Jie Bai
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou
- China
| | - Yu-Ling Wang
- School of Chemical Engineering and Technology
- China University of Mining and Technology
- Xuzhou
- China
| |
Collapse
|
17
|
Xu T, Wang D, Qiu P, Zhang J, Wang Q, Xia B, Xie X. In situ synthesis of porous Si dispersed in carbon nanotube intertwined expanded graphite for high-energy lithium-ion batteries. NANOSCALE 2018; 10:16638-16644. [PMID: 30155540 DOI: 10.1039/c8nr04587a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Silicon (Si) is perceived as one of the most promising anode materials for next-generation lithium-ion batteries (LIBs). For its practical application, superior electrochemical properties, low cost and scalable production are highly required. Herein, we synthesize a carbon nanotube intertwined expanded graphite/porous Si (CNT/EG/pSi) composite through the in situ magnesiothermic reduction method, where porous Si nanoparticles (NPs) are dispersed in the interspaces constructed by EG sheets, with CNTs intertwined throughout the composite, connecting Si NPs and EG sheets. Mesopores within Si NPs can not only shorten the electron and Li+ ion transport distance, but also play an important role in accommodating the huge volume change. EG and CNTs construct a three-dimensional conductive network, improving the electronic conductivity of the composite. Moreover, EG sheets release the excessive local stress over cycles, and CNTs can randomly build new electronic pathways as the structure changes, alleviating the degeneration of the conductive network. Consequently, the CNT/EG/pSi composite exhibits enhanced cycling and rate performances when used as the anode material, delivering reversible specific capacities of 2618 mA h g-1 at 0.2 A g-1 and 1390 mA h g-1 at 4 A g-1, maintaining a capacity of 2152 mA h g-1 after 100 cycles at 0.4 A g-1, with a capacity retention of 84%. This hierarchically structured anode material has a facile and low-cost synthetic route, as well as excellent electrochemical performances, making it attractive for high-performance LIB applications.
Collapse
Affiliation(s)
- Tao Xu
- Shanghai Institute of Microsystem and Information Technology, Shanghai, 200050, China.
| | | | | | | | | | | | | |
Collapse
|
18
|
Zhang L, Jin S, Wang Y, Ji J. Phosphate adsorption from aqueous solution by lanthanum-iron hydroxide loaded with expanded graphite. ENVIRONMENTAL TECHNOLOGY 2018; 39:997-1006. [PMID: 28394243 DOI: 10.1080/09593330.2017.1317843] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 04/04/2017] [Indexed: 06/07/2023]
Abstract
In this study, a novel adsorbent of expanded graphite loaded with lanthanum (III)-iron (III) hydroxide (EG-LaFe) was prepared for phosphate removal. The single factor of oscillating time, La/Fe molar ratio and total concentration of EG-LaFe were studied for optimization of preparation conditions. Effects of contact time, initial phosphate concentration, adsorption temperature and coexisting ions on the phosphate removal performance of EG-LaFe were investigated in detail. Adsorption kinetics and isothermal adsorption studies showed that the pseudo-second-order and the Langmuir model fitted the experimental data quite well. Thermodynamic analysis showed that the phosphate adsorption of EG-LaFe was spontaneous and endothermic. In addition, EG-LaFe exhibit high sorption selectivity toward phosphate over other coexisting ions. The phosphate adsorption mechanism was investigated by means of pH study, scanning electron microscopy and Fourier transform infrared spectroscopy. The results demonstrated that the probable mechanisms of phosphate adsorption on EG-LaFe were the replacement of surface hydroxyl groups (M-OH), electrostatic interaction and Lewis acid-base interaction.
Collapse
Affiliation(s)
- Ling Zhang
- a School of Environmental and Chemical Engineering , Shanghai University , Shanghai , People's Republic of China
| | - SuWan Jin
- a School of Environmental and Chemical Engineering , Shanghai University , Shanghai , People's Republic of China
| | - Yong Wang
- a School of Environmental and Chemical Engineering , Shanghai University , Shanghai , People's Republic of China
| | - Jiang Ji
- b XiaMen JiangTian Membrane Biotechnology LTD , Xiamen , People's Republic of China
| |
Collapse
|
19
|
Xu C, Jiao C, Yao R, Lin A, Jiao W. Adsorption and regeneration of expanded graphite modified by CTAB-KBr/H 3PO 4 for marine oil pollution. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 233:194-200. [PMID: 29078123 DOI: 10.1016/j.envpol.2017.10.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 09/19/2017] [Accepted: 10/07/2017] [Indexed: 06/07/2023]
Abstract
The cleaning-up of viscous oil spilled in ocean is a global challenge, especially in Bohai, due to its slow current movement and poor self-purification capacity. Frequent oil-spill accidents not only cause severe and long-term damages to marine ecosystems, but also lead to a great loss of valuable resources. To eliminate the environmental pollution of oil spills, an efficient and environment-friendly oil-recovery approach is necessary. In this study,1expanded graphite (EG) modified by CTAB-KBr/H3PO4 was synthesized via composite intercalation agents of CTAB-KBr and natural flake graphite, followed by the activation of phosphoric acid at low temperature. The resultant modified expanded graphite (M-EG) obtained an interconnected and continuous open microstructure with lower polarity surface, more and larger pores, and increased surface hydrophobicity. Due to these characteristics, M-EG exhibited a superior adsorption capacity towards marine oil. The saturated adsorption capacities of M-EG were as large as 7.44 g/g for engine oil, 6.12 g/g for crude oil, 5.34 g/g for diesel oil and 4.10 g/g for gasoline oil in 120min, exceeding the capacity of pristine EG. Furthermore, M-EG maintained good removal efficiency under different adsorption conditions, such as temperature, oil types, and sodium salt concentration. In addition, oils sorbed into M-EG could be recovered either by a simple compression or filtration-drying treatment with a recovery ratio of 58-83%. However, filtration-drying treatment shows better performance in preserving microstructures of M-EG, which ensures the adsorbents can be recycled several times. High removal capability, fast adsorption efficiency, excellent stability and good recycling performance make M-EG an ideal candidate for treating marine oil pollution in practical application.
Collapse
Affiliation(s)
- Congbin Xu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Chunlei Jiao
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Ruihua Yao
- Chinese Academy for Environmental Planning, Beijing, 100012, China
| | - Aijun Lin
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
| | - Wentao Jiao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| |
Collapse
|
20
|
Hu JQ, Yang SZ, Guo L, Xu X, Yao T, Xie F. Microscopic investigation on the adsorption of lubrication oil on microplastics. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2016.12.043] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
|
21
|
Durgadevi N, Swarnalatha V. Polythiophene functionalized hydrophobic cellulose kitchen wipe sponge and cellulose fabric for effective oil–water separation. RSC Adv 2017. [DOI: 10.1039/c7ra05578a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Oil–water separation using polythiophene coated cellulose sponge and fabric.
Collapse
Affiliation(s)
- Nagarajan Durgadevi
- Department of Sciences
- Amrita School of Engineering
- Amrita Vishwa Vidyapeetham
- Amrita University
- Coimbatore
| | | |
Collapse
|
22
|
Jiao X, Zhang L, Qiu Y, Yuan Y. A new adsorbent of Pb(ii) ions from aqueous solution synthesized by mechanochemical preparation of sulfonated expanded graphite. RSC Adv 2017. [DOI: 10.1039/c7ra05864k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
After the mechanochemical modification, sulfonated functional groups were able to be attached on the surface of SEG effectually, acted a significant role in the adsorption process, the schematic diagram of SEG interacted with Pb(ii) showing as below.
Collapse
Affiliation(s)
- Xuan Jiao
- School of Resources and Environmental Engineering
- Wuhan University of Technology
- Wuhan 430070
- China
- Hubei Province Key Laboratory for Processing of Mineral Resources and Environment
| | - Lingyan Zhang
- School of Resources and Environmental Engineering
- Wuhan University of Technology
- Wuhan 430070
- China
- Hubei Province Key Laboratory for Processing of Mineral Resources and Environment
| | - Yangshuai Qiu
- School of Resources and Environmental Engineering
- Wuhan University of Technology
- Wuhan 430070
- China
- Hubei Province Key Laboratory for Processing of Mineral Resources and Environment
| | - Yunru Yuan
- School of Resources and Environmental Engineering
- Wuhan University of Technology
- Wuhan 430070
- China
- Hubei Province Key Laboratory for Processing of Mineral Resources and Environment
| |
Collapse
|
23
|
Xu C, Li J, He F, Cui Y, Huang C, Jin H, Hou S. Al2O3–Fe3O4–expanded graphite nano-sandwich structure for fluoride removal from aqueous solution. RSC Adv 2016. [DOI: 10.1039/c6ra19390k] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, a novel Al2O3–Fe3O4–expanded graphite nano-sandwich adsorbent was prepared to remove fluoride from aqueous solutions.
Collapse
Affiliation(s)
- Chunhui Xu
- Department of Faculty of Material Science and Chemistry
- School of China University of Geosciences
- Wuhan 430074
- PR China
| | - Jianying Li
- Department of Faculty of Material Science and Chemistry
- School of China University of Geosciences
- Wuhan 430074
- PR China
| | - Fujian He
- Department of Faculty of Material Science and Chemistry
- School of China University of Geosciences
- Wuhan 430074
- PR China
| | - Yanli Cui
- Department of Faculty of Material Science and Chemistry
- School of China University of Geosciences
- Wuhan 430074
- PR China
| | - Can Huang
- Department of Faculty of Material Science and Chemistry
- School of China University of Geosciences
- Wuhan 430074
- PR China
| | - Hongyun Jin
- Department of Faculty of Material Science and Chemistry
- School of China University of Geosciences
- Wuhan 430074
- PR China
| | - Shuen Hou
- Department of Faculty of Material Science and Chemistry
- School of China University of Geosciences
- Wuhan 430074
- PR China
| |
Collapse
|