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Villafranca JC, Berton P, Ferguson M, Clausen R, Arancibia-Miranda N, Martinis EM. Aluminosilicates-based nanosorbents for heavy metal removal - A review. JOURNAL OF HAZARDOUS MATERIALS 2024; 474:134552. [PMID: 38823105 DOI: 10.1016/j.jhazmat.2024.134552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/17/2024] [Accepted: 05/03/2024] [Indexed: 06/03/2024]
Abstract
Contamination of water bodies with heavy metals poses a significant threat to human health and the environment, requiring the development of effective treatment techniques. In this context, aluminosilicates emerge as promising sorbents due to their cost-effectiveness and natural abundance. This review provides a clear, in-depth, and comprehensive description of the structure, properties, and characteristics of aluminosilicates, supporting their application as adsorbents and highlighting their diversity and adaptability to different matrices and analytes. Furthermore, the functionalization of these materials is thoroughly addressed, detailing the techniques currently used, exposing the advantages and disadvantages of each approach, and establishing comparisons and evaluations of the performances of various functionalized aluminosilicates in the extraction of heavy metals in aqueous matrices. This work aims not only to comprehensively review numerous studies from recent years but also to identify trends in the study of such materials and inspire future research and applications in the field of contaminant removal using aluminosilicates.
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Affiliation(s)
- Juan C Villafranca
- Facultad de Ingeniería, Universidad Nacional de Cuyo - Centro Universitario, Mendoza, M5500 Mendoza, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Paula Berton
- Chemical and Petroleum Engineering Department, University of Calgary, Calgary, AB, Canada
| | - Michael Ferguson
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Ruth Clausen
- Facultad de Ingeniería, Universidad Nacional de Cuyo - Centro Universitario, Mendoza, M5500 Mendoza, Argentina
| | - Nicolás Arancibia-Miranda
- Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Santiago, Chile; Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Estefanía M Martinis
- Facultad de Ingeniería, Universidad Nacional de Cuyo - Centro Universitario, Mendoza, M5500 Mendoza, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina; Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mendoza, Argentina.
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2
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Ayalew AA. A critical review on clay-based nanocomposite particles for application of wastewater treatment. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 85:3002-3022. [PMID: 35638802 DOI: 10.2166/wst.2022.150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nanotechnology plays an important function in recent environmental aspects for the elimination of contaminants in the ecosystem. In recent times, nano-clay has initiated more concentration because of its distinctive physicochemical properties and characteristics. Recently, many types of research in clay-based nanocomposite were accomplished in the elimination of pollutants from water sources. Nanocomposite materials have advanced properties useful for contaminat removal such as higher surface area, thermal stability, selectivity to remove different contaminants, improved process ability, and fast decontamination. Thus, the development of clay-based composite materials is one of the upcoming directions to use effectively in water and wastewater treatment as adsorbent nanomaterials. This paper assesses the latest achievement in clay-based nanocomposite preparation, material property analysis and function for various pollutant removals. In particular, great consideration was paid to the recent progress in clay/metallic, clay-polymer, and clay-carbon composites presenting their application in the removal of different kinds of pollutants. Moreover, the mechanism of adsorption, the challenges and future perspective were also discussed to reach the optimum performance of the nanomaterials adsorbent. It is confirmed that clay-based nanocomposite materials are more cost-effective technology than conventional treatment methods.
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Affiliation(s)
- Adane Adugna Ayalew
- Faculty of Chemical and Food Engineering, Bahir Dar Institute of Technology, Bahir Dar University, Bahir Dar, Ethiopia E-mail:
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3
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Xu W, Liu C, Zhu JM, Bu H, Tong H, Chen M, Tan D, Gao T, Liu Y. Adsorption of cadmium on clay-organic associations in different pH solutions: The effect of amphoteric organic matter. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 236:113509. [PMID: 35421828 DOI: 10.1016/j.ecoenv.2022.113509] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/31/2022] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Abstract
Clay minerals are important soil components and usually coexist with organic matter, forming mineral-organic associations (MOAs), which control the speciation, mobility, and bioavailability of heavy metals. However, the adsorption mechanism of cadmium (Cd) by MOAs is still unclear, especially for the associations of amphotericorganic matter and clay minerals. In this study, 12-aminododecanoic acid (ALA) and montmorillonite (Mt) were chosen to prepare MOAs via intercalation (Mt-ALA composite) and physical mixing (Mt-ALA mixture). Batch experiments were conducted to investigate the adsorption mechanism of Cd(II) by MOAs under different pH values and initial Cd(II) concentrations. The results showed that the Cd(II) adsorption capacities followed as Mt > Mt-ALA mixture > Mt-ALA composite under acidic conditions, Mt-ALA mixture > Mt > Mt-ALA composite under neutral conditions, and Mt-ALA mixture > Mt-ALA composite > Mt under alkaline conditions, suggesting the adsorption behaviors of Cd(II) by MOAs were primarily constrained by the speciation of ALA and solution pH. Under acidic conditions, cationic HALA+ could intercalate into the interlayer of Mt and occupy the adsorption sites, reducing the adsorption capacity of Cd(II). As pH increased to neutral, HALA+ decreased and changed to a zwitterionic state, which caused ALA to release out from the interlayer of Mt-ALA composite or not easily enter into Mt-ALA mixture and promoted Cd(II) adsorption. Under alkaline conditions, the increase of anion ALA- would cause ALA to be mainly adsorbed on the surface of Mt and chelate with Cd(II), enhancing the adsorption of Cd(II). Further analysis by Fourier transform infrared and X-ray photoelectron spectroscopy indicated that the carboxyl and amino groups of ALA both participated in the adsorption of Cd(II). These findings could extend the knowledge on the mobility and fate of Cd in clay-based soils and be used as a basis for understanding the biogeochemical behavior of Cd in the environment.
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Affiliation(s)
- Wenpo Xu
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Chengshuai Liu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Jian-Ming Zhu
- State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China
| | - Hongling Bu
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.
| | - Hui Tong
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Manjia Chen
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.
| | - Decan Tan
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Ting Gao
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Yizhang Liu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
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Pavón E, Alba MD. Insight into the role of temperature, time and pH in the effective zirconium retention using clay minerals. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 308:114635. [PMID: 35114518 DOI: 10.1016/j.jenvman.2022.114635] [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: 11/09/2021] [Revised: 01/26/2022] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
The use of zirconium in chemical industries generates a potential risk of Zr contamination in the environment, with particular concern for the decommissioning of uranium-graphite reactors. Among the natural adsorbents employed for the treatment of nuclear waste, clay minerals showed a very high affinity adsorption for radionuclides, but the influence of the chemical composition, pressure, temperature and time reaction have not yet been analysed on deep. Thus, the objective of this research is to explore several experimental conditions for an actual prediction of the behaviour of zirconium immobilization by clay minerals. The results have shown that factors such as zirconium cation nature (Zr4+ or ZrO2+), temperature, time and pH influence the extent of zirconium immobilization by clay minerals and the zirconium phases generated. At moderate conditions, zirconium tectosilicates are formed and evolve to zircon at high temperature and a longer time reaction.
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Affiliation(s)
- Esperanza Pavón
- Instituto Ciencia de los Materiales de Sevilla (CSIC-US), Avda. Americo Vespucio, 49, 41092, Sevilla, Spain; Departamento de Física de la Materia Condensada, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012, Sevilla, Spain
| | - María D Alba
- Instituto Ciencia de los Materiales de Sevilla (CSIC-US), Avda. Americo Vespucio, 49, 41092, Sevilla, Spain.
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Immobilization of Laccase on Hybrid Super-Structured Nanomaterials for the Decolorization of Phenolic Dyes. Processes (Basel) 2022. [DOI: 10.3390/pr10020233] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
In the present work, hybrid super-structured nanomaterials were synthesized by the combination of smectite nanoclays with various carbon-based nanomaterials (graphene oxide, carbon nanotubes and adamantylamine) and were used as nanosupports for the covalent and non-covalent immobilization of laccase from Trametes versicolor (TvL). TvL was successfully immobilized on these hybrid nanomaterials, achieving high immobilization yields (up to 85%), while its conformation remained unaltered upon immobilization. The apparent kinetic constants Vmax and Km of the immobilized enzymes strongly depended on the immobilization procedure and the composition of hybrid nanomaterials. Immobilized TvL preserved up to 50% of its initial activity after 24 h of incubation at 60 °C, while free enzyme was totally deactivated. The TvL-hybrid nanomaterials bioconjugates were efficiently applied for the degradation of various synthetic dyes, exhibiting excellent decolorization capacity, as well as high reusability (up to 11 successive catalytic cycles), providing insights into the use of these bionanoconjugates on applications with environmental, and industrial interest.
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Ngassa GBP, Fafard J, Tonle IK. Kaolinite‐based Hybrid Material from Interlayer Grafting of 1‐(2‐hydroxyethyl)piperazine and Application to the Sensitive Voltammetric Detection of Lead. ELECTROANAL 2022. [DOI: 10.1002/elan.202100205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Guy B. Piegang Ngassa
- Department of Chemistry Faculty of Science University of Douala, P.O. Box 24 157 Douala Cameroon
- Laboratory of Analytical Chemistry Faculty of Science University of Yaoundé 1, P.O. Box 812 Yaoundé Cameroon
- Department of Chemistry and Center for Catalysis Research and Innovation University of Ottawa 10 Marie Curie K1 N6 N5 Ottawa Ontario Canada
| | - Jonathan Fafard
- Department of Chemistry and Center for Catalysis Research and Innovation University of Ottawa 10 Marie Curie K1 N6 N5 Ottawa Ontario Canada
| | - Ignas K. Tonle
- Electrochemistry and Chemistry of Materials Department of Chemistry Faculty of Science University of Dschang PO Box 67 Dschang Cameroon
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Wang G, Xiao H, Zhu J, Zhao H, Liu K, Ma S, Zhang S, Komarneni S. Simultaneous removal of Zn 2+ and p-nitrophenol from wastewater using nanocomposites of montmorillonite with alkyl-ammonium and complexant. ENVIRONMENTAL RESEARCH 2021; 201:111496. [PMID: 34139221 DOI: 10.1016/j.envres.2021.111496] [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: 02/04/2021] [Revised: 05/11/2021] [Accepted: 06/04/2021] [Indexed: 06/12/2023]
Abstract
Three types of alkyl-ammonium with different branching chains and three complexants with different functional groups were used to prepare alkyl-ammonium or complexant intercalated montmorillonite nanocomposite (A-Mt or C-Mt). In addition, synergistic intercalated montmorillonite nanocomposites (A/C-Mt) with alkyl-ammonium along with complexant were also prepared. The adsorption performance of the various nanocomposites toward Zn2+ and p-nitrophenol (PNP) from simulated binary wastewater containing both Zn2+ and PNP were systematically investigated. Characterization of Mt nanocomposites showed that both alkyl-ammoniums and complexants were successfully intercalated into the interlayers of Mt. The surfactant loading amounts of the various nanocomposites were also determined and correlated with the resulting expansion of the interlayer spacing. It was found that intercalation of alkane (OTAC) and -SH (CSH) were conducive to the adsorption of Zn2+ while -C2H4NH (TETA) and all alkyl-ammoniums were beneficial for PNP adsorption. The extent of adsorption was found to be controlled primarily by pH, i.e., the higher pH had a good effect on the adsorption of both Zn2+ and PNP. The adsorption process of Zn2+ onto Mt nanocomposites was more in line with the Freundlich model (R2 = 0.99), while the Langmuir model described the adsorption of PNP well (R2 = 0.99). The adsorption kinetics could be well described by the Elovich equation (R2 = 0.98) and the double-constant model (R2 = 0.89). Chemical adsorption was determined to be the dominant process between the contaminant and Mt nanocomposite surfaces.
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Affiliation(s)
- Guifang Wang
- School of Chemistry and Chemical Engineering, School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning, 530004, China; State Key Laboratory of Mineral Processing, BGRIMM Technology Group, Beijing, 100160, China.
| | - Huizhen Xiao
- School of Chemistry and Chemical Engineering, School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning, 530004, China
| | - Jinliang Zhu
- School of Chemistry and Chemical Engineering, School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning, 530004, China
| | - Hongyuan Zhao
- Xinxiang Engineering Technology Research Center for Advanced Materials Preparation and Surface Strengthening, Henan Institute of Science and Technology, Xinxiang, 453003, China
| | - Kun Liu
- School of Chemistry and Chemical Engineering, School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning, 530004, China
| | - Shaojian Ma
- School of Chemistry and Chemical Engineering, School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning, 530004, China
| | - Shuai Zhang
- Sinosteel Mining Company Limited, Sinosteel Corporation, Beijing, 100080, China
| | - Sridhar Komarneni
- Department of Ecosystem Science and Management and Materials Research Institute, 204EEL, The Pennsylvania State University, University Park, PA, 16802, USA.
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8
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Chang PH, Liu P, Sarkar B, Mukhopadhyay R, Yang QY, Tzou YM, Zhong B, Li X, Owens G. Unravelling the mechanism of amitriptyline removal from water by natural montmorillonite through batch adsorption, molecular simulation and adsorbent characterization studies. J Colloid Interface Sci 2021; 598:379-387. [PMID: 33915416 DOI: 10.1016/j.jcis.2021.04.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 03/29/2021] [Accepted: 04/07/2021] [Indexed: 11/18/2022]
Abstract
Amitriptyline (AMI) is one of the most common tricyclic antidepressant personal care medications. Due to its environmental persistence and bioaccumulation, release of AMI into the environment via wastewater streams in elevated levels could lead to significant ecological and human health impacts. In this study, the adsorption of AMI by montmorillonite (SWy-2), a naturally abundant smectite clay with sodium ions as the main interlayer cations, was investigated. Maximum AMI adsorption (276 mg/g) occurred at pH 7-8. After adsorption, examination of the adsorbent's X-ray diffraction pattern indicated that interlayer expansion had occurred, where chemical stoichiometry confirmed cation exchange as the principal adsorption mechanism. AMI adsorption reached equilibrium within 4 h, with kinetic data best fitting the pseudo-second order kinetic model (R2 = 0.98). AMI adsorption was unaffected by solution pH in the range 2-11, where adsorption was endothermic, and molecular simulations substantiated by Fourier transform infrared spectroscopy and thermogravimetric investigations indicated that the orientation of AMI molecules in the interlayer was via an amine group and a benzene ring. Overall this research shows that SWy-2 has significant potential as a low cost, effective, and geologically derived natural material for AMI removal in wastewater systems.
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Affiliation(s)
- Po-Hsiang Chang
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi 710049, PR China
| | - Pan Liu
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi 710049, PR China
| | - Binoy Sarkar
- Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, United Kingdom.
| | - Raj Mukhopadhyay
- Division of Irrigation and Drainage Engineering, ICAR-Central Soil Salinity Research Institute, Karnal 132001, Haryana, India
| | - Qing-Yuan Yang
- School of Chemical Engineering and Technology, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi 710049, PR China.
| | - Yu-Min Tzou
- Department of Soil and Environmental Sciences, National Chung Hsing University, 145 Xingda Rd., Taichung 40227, Taiwan
| | - Bo Zhong
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi 710049, PR China
| | - Xuxiang Li
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi 710049, PR China
| | - Gary Owens
- Environmental Contaminants Group, Future Industries Institute, University of South Australia, Mawson Lakes, SA 5095, Australia
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Chang PH, Sarkar B. Mechanistic insights into ethidium bromide removal by palygorskite from contaminated water. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 278:111586. [PMID: 33171377 DOI: 10.1016/j.jenvman.2020.111586] [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: 06/03/2020] [Revised: 09/29/2020] [Accepted: 10/27/2020] [Indexed: 06/11/2023]
Abstract
Ethidium bromide (EtBr)-containing wastewater can be hazardous to biodiversity when released into the soil and water bodies without treatment. EtBr can mutate living microbial cells and pose toxicity to even higher organisms. This work investigated the removal of EtBr from aqueous solutions by a naturally occurring palygorskite (PFl-1) clay mineral via systematic batch adsorption experiments under different physicochemical conditions. EtBr existed in an undissociated form at pH ~7, and was adsorbed on PFl-1 obeying the Freundlich isotherm model. The maximum EtBr adsorption capacity was 285 mmol/kg. The best fitted kinetic model for EtBr adsorption was the pseudo-second order model. The amounts of exchangeable cations desorbed from PFl-1 during EtBr adsorption was linearly correlated to the amounts of EtBr adsorbed, with a slope of 0.97, implying that a cation exchange-based adsorption mechanism was dominating. Additionally, dimerization of EtBr molecules via bromide release assisted an increased EtBr removal by PFl-1 at high adsorbate concentrations. Detailed x-ray diffraction, Fourier transform infrared, scanning electron imaging and energy dispersive x-ray analyses confirmed that EtBr adsorption occurred dominantly on the surface of palygorskite which mineralogically constituted 80% of the bulk PFl-1 adsorbent. A small portion of EtBr was also adsorbed by PFl-1 through intercalation onto the smectite impurity (10%) in PFl-1. This study suggested that PFl-1 could be an excellent natural material for removing EtBr from pharmaceutical and laboratory wastewater.
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Affiliation(s)
- Po-Hsiang Chang
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi, 710049, PR China.
| | - Binoy Sarkar
- Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom.
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Adsorption of Pharmaceuticals onto Smectite Clay Minerals: A Combined Experimental and Theoretical Study. MINERALS 2021. [DOI: 10.3390/min11010062] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The adsorption of two pharmaceuticals, carbamazepine and paracetamol, onto the expandable clay mineral saponite has been studied through the combination of kinetic experiments, X-ray diffraction, and theoretical modeling. Kinetic experiments indicate low adsorption for carbamazepine and paracetamol on expandable smectite clay. Accordingly, X-ray diffraction experiments show that neither compound enters smectite interlayer space. Molecular dynamics simulations were carried out to understand the interactions between the two pharmaceuticals and the saponite basal surface in the presence of Na+ cations. Calculations reveal that paracetamol almost does not coordinate solution cations, whereas a rather low coordination to cation is observed for carbamazepine. As a result, the adsorption onto the clay surface results mainly from van der Waals interactions for both pharmaceuticals. Carbamazepine does adsorb the surface via two configurations, one involving cation coordination, which corresponds to a rather stable adsorption compared to paracetamol. This is confirmed by structural analyses completed with desorption free energy profile.
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Treatment of Water Contaminated with Reactive Black-5 Dye by Carbon Nanotubes. MATERIALS 2020; 13:ma13235508. [PMID: 33287120 PMCID: PMC7730969 DOI: 10.3390/ma13235508] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 11/23/2022]
Abstract
Most of the dyes used today by the textile industry are of synthetic origin. These substances, many of which are highly toxic, are in many cases not adequately filtered during the processing stages, ending up in groundwater and water courses. The aim of this work was to optimize the adsorption process of carbon nanotubes to remove an azo-dye, called Reactive Black-5, from aqueous systems. Particular systems containing carbon nanotubes and dye solutions were analyzed. Furthermore, the reversibility of the process and the presence of possible degradation phenomena by the dye molecules were investigated. For this purpose, the influence of different parameters on the adsorption process, such as the nature of the carbon nanotubes (purified and nonpurified), initial concentration of the dye, stirring speed, and contact times, were studied. The solid and liquid phases after the tests were characterized by chemical-physical techniques such as thermogravimetric analysis (TG, DTA), UV spectrophotometry, BET (Brunauer, Emmett, Teller), and TOC (total organic carbon) analysis. The data obtained showed a high adsorbing capacity of carbon nanotubes in the removal of the Reactive Black-5 dye from aqueous systems. Furthermore, the efficiency of the adsorption process was observed to be influenced by the stirring speed of the samples and the contact time, while purified and nonpurified nanotubes provided substantially the same results.
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Phuekphong AF, Imwiset KJ, Ogawa M. Designing nanoarchitecture for environmental remediation based on the clay minerals as building block. JOURNAL OF HAZARDOUS MATERIALS 2020; 399:122888. [PMID: 32937697 DOI: 10.1016/j.jhazmat.2020.122888] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 04/29/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
Nanoarchitecture of hybrids materials based on clay minerals as nano building blocks for the environmental remediation is summarized with the emphasis on the utilization of layered clay minerals, especially smectite group of clay minerals, as nano building blocks for designing functional nanostructures for the adsorption of molecular contaminants from the environments. Smectites are well-known adsorbents of cationic contaminants, while surface modification of smectites with organoammonium ions has given hydrophobic and microporous characters to uptake nonionic organic contaminants from environments. Not only on the designed interactions between adsorbent-adsorbate for efficient and higher capacity adsorption, the states of the adsorbed nonionic organic compounds have been altered and varied by the modification of smectites as shown by the controlled release and specific catalytic reactions. The organically modified clays are classified from the nanoarchitecture, and the functions derived from the nanoarchitectures are discussed based on the structure-property relationship.
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Affiliation(s)
- Alisa Fern Phuekphong
- School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, 555 Moo 1 Payupnai, Wangchan, Rayong 21210, Thailand
| | - Kamonnart Jaa Imwiset
- School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, 555 Moo 1 Payupnai, Wangchan, Rayong 21210, Thailand
| | - Makoto Ogawa
- School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, 555 Moo 1 Payupnai, Wangchan, Rayong 21210, Thailand.
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13
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Shen Y, Jiao S, Ma Z, Lin H, Gao W, Chen J. Humic acid-modified bentonite composite material enhances urea-nitrogen use efficiency. CHEMOSPHERE 2020; 255:126976. [PMID: 32402890 DOI: 10.1016/j.chemosphere.2020.126976] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/27/2020] [Accepted: 05/03/2020] [Indexed: 06/11/2023]
Abstract
Bentonite was modified by introducing humic acid (HA) into interlayer space of bentonite. The structural and physicochemical properties of modified bentonite were determined by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), X-ray powder diffraction (XRD) and thermogravimetric analysis (TGA). The results showed that HA could enter the bentonite interlayer and increase the interlayer distance. Moreover, we were also investigated the high adsorption capacity and thermodynamics of modified bentonite to NH4+ cations in solutions. Under the same conditions, the NH4+ adsorption efficiency of modified bentonite (96.4%) was 69.2% higher compared with the natural bentonite (57.0%). The pseudo-second order kinetic model well fit the adsorption kinetics of NH4+ on modified bentonite, indicating that the adsorption type was chemical adsorption or chemisorptions. The isotherms fit well with Langmuir model, and the separation factor revealed that NH4+ on modified bentonite belonged to favorable adsorption. Compared with the natural bentonite, the modified bentonite exhibited a much lower leaching loss of NH4+-N and NO3--N in soil. Meanwhile, the loss of nitrogen caused by NH3 volatilization and N2O emission from soil could also be significantly attenuated by the combined application of modified bentonite and urea. The slower nitrogen release in the treatment combining modified bentonite and urea resulted in a greater yield and nitrogen uptake of wheat. Collectively, the modified bentonite could be used as nitrogen fertilizer synergist to enhance the nitrogen use efficiency.
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Affiliation(s)
- Yuwen Shen
- Shandong Academy of Agricultural Sciences, Institute of Agricultural Resources and Environment, Key Laboratory of Wastes Matrix Utilization, Ministry of Agriculture, Shandong Provincial Engineering Research Center of Environmental Protection Fertilizers, Jinan, 250100, PR China; State Key Laboratory of Nutrition Resources Integrated Utilization, Linshu, 276700, PR China.
| | - Shuying Jiao
- College of Resources and Environment, Shandong Agricultural University, Taian, 271018, PR China
| | - Zheng Ma
- Shandong Academy of Agricultural Sciences, Institute of Agricultural Resources and Environment, Key Laboratory of Wastes Matrix Utilization, Ministry of Agriculture, Shandong Provincial Engineering Research Center of Environmental Protection Fertilizers, Jinan, 250100, PR China
| | - Haitao Lin
- Shandong Academy of Agricultural Sciences, Institute of Agricultural Resources and Environment, Key Laboratory of Wastes Matrix Utilization, Ministry of Agriculture, Shandong Provincial Engineering Research Center of Environmental Protection Fertilizers, Jinan, 250100, PR China
| | - Wensheng Gao
- Fruit and Tea Technique Extension Station, Shandong Agriculture Department, Jinan, 250013, China
| | - Jianqiu Chen
- State Key Laboratory of Nutrition Resources Integrated Utilization, Linshu, 276700, PR China
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14
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Nagappan S, Tsai PC, Devendran S, Alagarsamy V, Ponnusamy VK. Enhancement of biofuel production by microalgae using cement flue gas as substrate. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:17571-17586. [PMID: 31512119 DOI: 10.1007/s11356-019-06425-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 09/04/2019] [Indexed: 06/10/2023]
Abstract
The cement industry generates a substantial amount of gaseous pollutants that cannot be treated efficiently and economically using standard techniques. Microalgae, a promising bioremediation and biodegradation agent used as feedstock for biofuel production, can be used for the biotreatment of cement flue gas. In specific, components of cement flue gas such as carbon dioxide, nitrogen, and sulfur oxides are shown to serve as nutrients for microalgae. Microalgae also have the capacity to sequestrate heavy metals present in cement kiln dust, adding further benefits. This work provides an extensive overview of multiple approaches taken in the inclusion of microalgae biofuel production in the cement sector. In addition, factors influencing the production of microalgal biomass are also described in such an integrated plant. In addition, process limitations such as the adverse impact of flue gas on medium pH, exhaust gas toxicity, and efficient delivery of carbon dioxide to media are also discussed. Finally, the article concludes by proposing the future potential for incorporating the microalgae biofuel plant into the cement sector.
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Affiliation(s)
- Senthil Nagappan
- Department of Biotechnology, Sri Venkateswara College of Engineering (Autonomous - Affiliated to Anna University), Sriperumbudur, Tamil Nadu, 602 117, India
| | - Pei-Chien Tsai
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, No. 100, Shiquan 1st Road, Sanmin District, Kaohsiung City, 807, Taiwan
| | - Saravanan Devendran
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Vardhini Alagarsamy
- Department of Biotechnology, Sri Venkateswara College of Engineering (Autonomous - Affiliated to Anna University), Sriperumbudur, Tamil Nadu, 602 117, India
| | - Vinoth Kumar Ponnusamy
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, No. 100, Shiquan 1st Road, Sanmin District, Kaohsiung City, 807, Taiwan.
- Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung City, 807, Taiwan.
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15
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Awasthi A, Jadhao P, Kumari K. Clay nano-adsorbent: structures, applications and mechanism for water treatment. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0858-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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16
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Massimi L, Giuliano A, Astolfi ML, Congedo R, Masotti A, Canepari S. Efficiency Evaluation of Food Waste Materials for the Removal of Metals and Metalloids from Complex Multi-Element Solutions. MATERIALS 2018; 11:ma11030334. [PMID: 29495363 PMCID: PMC5872913 DOI: 10.3390/ma11030334] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 02/12/2018] [Accepted: 02/23/2018] [Indexed: 11/16/2022]
Abstract
Recent studies have shown the potential of food waste materials as low cost adsorbents for the removal of heavy metals and toxic elements from wastewater. However, the adsorption experiments have been performed in heterogeneous conditions, consequently it is difficult to compare the efficiency of the individual adsorbents. In this study, the adsorption capacities of 12 food waste materials were evaluated by comparing the adsorbents’ efficiency for the removal of 23 elements from complex multi-element solutions, maintaining homogeneous experimental conditions. The examined materials resulted to be extremely efficient for the adsorption of many elements from synthetic multi-element solutions as well as from a heavy metal wastewater. The 12 adsorbent surfaces were analyzed by Fourier transform infrared spectroscopy and showed different types and amounts of functional groups, which demonstrated to act as adsorption active sites for various elements. By multivariate statistical computations of the obtained data, the 12 food waste materials were grouped in five clusters characterized by different elements’ removal efficiency which resulted to be in correlation with the specific adsorbents’ chemical structures. Banana peel, watermelon peel and grape waste resulted the least selective and the most efficient food waste materials for the removal of most of the elements.
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Affiliation(s)
- Lorenzo Massimi
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185 Roma, Italy.
| | - Antonella Giuliano
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185 Roma, Italy.
| | - Maria Luisa Astolfi
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185 Roma, Italy.
| | - Rossana Congedo
- Istituto di Istruzione Superiore "Quinto Ennio", Corso Roma, 100, 73014 Gallipoli, Italy.
| | - Andrea Masotti
- Children's Hospital Bambino Gesù-IRCCS, Research Laboratories, Viale San Paolo, 15, 00145 Rome, Italy.
| | - Silvia Canepari
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro, 5, 00185 Roma, Italy.
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17
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Vieira MGA, de Almeida Neto AF, Gimenes ML, da Silva MGC. Capacity assessment and potential for reuse of calcined Bofe bentonitic clay for adsorption of nickel. CAN J CHEM ENG 2016. [DOI: 10.1002/cjce.22528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Melissa Gurgel Adeodato Vieira
- School of Chemical Engineering; Department of Processes and Products Design; University of Campinas; UNICAMP 13083-852 Campinas-SP Brazil
| | - Ambrósio Florêncio de Almeida Neto
- School of Chemical Engineering; Department of Processes and Products Design; University of Campinas; UNICAMP 13083-852 Campinas-SP Brazil
| | | | - Meuris Gurgel Carlos da Silva
- School of Chemical Engineering; Department of Processes and Products Design; University of Campinas; UNICAMP 13083-852 Campinas-SP Brazil
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Ngassa Piegang GB, Tonle IK, Walcarius A, Ngameni E. An inorganic-organic hybrid material from the co-intercalation of a cationic surfactant and thiourea within montmorillonite layers: application to the sensitive stripping voltammetric detection of Pb2+ and Cd2+ ions. CR CHIM 2016. [DOI: 10.1016/j.crci.2015.08.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Yu Y, Hu Z, Chen Z, Yang J, Gao H, Chen Z. Organically-modified magnesium silicate nanocomposites for high-performance heavy metal removal. RSC Adv 2016. [DOI: 10.1039/c6ra20181d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
A disulfide-grafted polyethyleneimine (PES)@Mg2SiO4composite was synthesized, characterized, and used successfully to remove heavy metals from wastewater.
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Affiliation(s)
- Yichang Yu
- State Key Laboratory of Pollution Control and Resource Reuse
- College of Environmental Science and Engineering
- Tongji University
- Shanghai 200092
- PR China
| | - Zhangjun Hu
- State Key Laboratory of Pollution Control and Resource Reuse
- College of Environmental Science and Engineering
- Tongji University
- Shanghai 200092
- PR China
| | - Zhenyong Chen
- State Key Laboratory of Pollution Control and Resource Reuse
- College of Environmental Science and Engineering
- Tongji University
- Shanghai 200092
- PR China
| | - Jiaxiang Yang
- Key Laboratory of Functional Inorganic Materials of Anhui Province
- Anhui University
- Hefei 230039
- PR China
| | - Hongwen Gao
- State Key Laboratory of Pollution Control and Resource Reuse
- College of Environmental Science and Engineering
- Tongji University
- Shanghai 200092
- PR China
| | - Zhiwen Chen
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai
- PR China
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20
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Markou G, Inglezakis VJ, Mitrogiannis D, Efthimiopoulos I, Psychoyou M, Koutsovitis P, Muylaert K, Baziotis I. Sorption mechanism(s) of orthophosphate onto Ca(OH)2pretreated bentonite. RSC Adv 2016. [DOI: 10.1039/c5ra27638a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bentonite was chemically pretreated with Ca(OH)2to enhance orthophosphate phosphorus (OPP) sorption capacity (qe).
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Affiliation(s)
- Giorgos Markou
- Department of Natural Resources Management and Agricultural Engineering
- Agricultural University of Athens
- 11855 Athens
- Greece
| | - Vassilis J. Inglezakis
- Chemical Engineering Department
- School of Engineering
- Nazarbayev University
- 010000 Astana
- Republic of Kazakhstan
| | - Dimitris Mitrogiannis
- Department of Natural Resources Management and Agricultural Engineering
- Agricultural University of Athens
- 11855 Athens
- Greece
| | - Ilias Efthimiopoulos
- Theoretical and Physical Chemistry Institute
- National Hellenic Research Foundation
- Athens 11635
- Greece
| | - Maria Psychoyou
- Department of Natural Resources Management and Agricultural Engineering
- Agricultural University of Athens
- 11855 Athens
- Greece
| | | | | | - Ioannis Baziotis
- Department of Natural Resources Management and Agricultural Engineering
- Agricultural University of Athens
- 11855 Athens
- Greece
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21
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Ngassa GB, Tonlé IK, Ngameni E. Square wave voltammetric detection by direct electroreduction of paranitrophenol (PNP) using an organosmectite film-modified glassy carbon electrode. Talanta 2016; 147:547-55. [DOI: 10.1016/j.talanta.2015.10.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Revised: 10/12/2015] [Accepted: 10/12/2015] [Indexed: 11/26/2022]
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22
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Removal of Cu2+ from aqueous solution by adsorption onto mercapto functionalized palygorskite. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.08.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Almeida Neto AFD, Vieira MGA, Silva MGCD. Insight of the removal of nickel and copper ions in fixed bed through acid activation and treatment with sodium of clay. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2014. [DOI: 10.1590/0104-6632.20140314s00001976] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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24
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Daikopoulos C, Bourlinos AB, Georgiou Y, Deligiannakis Y, Zboril R, Karakassides MA. A functionalized phosphonate-rich organosilica layered hybrid material (PSLM) fabricated through a mild process for heavy metal uptake. JOURNAL OF HAZARDOUS MATERIALS 2014; 270:118-126. [PMID: 24565929 DOI: 10.1016/j.jhazmat.2014.01.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 01/14/2014] [Accepted: 01/27/2014] [Indexed: 06/03/2023]
Abstract
A phosphonate-rich organosilica layered hybrid material (PSLM) made of 3-(trihydroxysilyl)propyl methylphosphonate, monosodium salt, as the single silica source, has been obtained from its aqueous solution through a xerogel process and mild thermal aging. The method is simple, affording bulk quantities of powdered PSLM in a single-step. The hybrid is stable in water and possesses a high content of phosphonate groups fixed on the solid matrix. In addition, PSLM shows good thermal stability, which exceeds 300°C in air. The material was characterized using SEM, TEM, XRD, FT-IR and TGA techniques. Potentiometric titrations show that PSLM bears high-surface density of phosphonate groups (3 mmol g(-1)). As a result, the material displays high metal uptake capacity for heavy metal ions such as Cu(2+) (2.72mmolg(-1)), Pb(2+) (1.67 mmol g(-1)) and Cd(2+) (1.00 mmol g(-1)) at neutral pH values e.g. the pH of natural waters. Detailed theoretical modeling using a Surface Complexation Model combined with Electron Paramagnetic Resonance (EPR) spectroscopy shows that the surface distribution of surface bound Cu(2+) ions is rather homogeneous e.g. copper-binding phosphonate sites are arranged in average distances 5-8Å.
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Affiliation(s)
- Chris Daikopoulos
- Department of Materials Science and Engineering, University of Ioannina, Ioannina 45110, Greece
| | - Athanasios B Bourlinos
- Institute of Materials Science, NCSR "Demokritos", Ag. Paraskevi Attikis, Athens 15310, Greece
| | - Yiannis Georgiou
- Laboratory of Physical Chemistry, Department of Environmental and Natural Resources Management, University of Patras, Seferi 2, Agrinio 30100, Greece
| | - Yiannis Deligiannakis
- Laboratory of Physical Chemistry, Department of Environmental and Natural Resources Management, University of Patras, Seferi 2, Agrinio 30100, Greece.
| | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Department of Physical Chemistry and Experimental Physics, Palacky University, Olomouc 77146, Czech Republic
| | - Michael A Karakassides
- Department of Materials Science and Engineering, University of Ioannina, Ioannina 45110, Greece
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25
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El-Mallah NM, Hassouba HM. Kinetic and Thermodynamic Studies for the Removal of Nickel Ions from an Aqueous Solution by Adsorption Technique. J DISPER SCI TECHNOL 2013. [DOI: 10.1080/01932691.2013.769173] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Agwaramgbo L, Magee N, Nunez S, Mitt K. Biosorption and Chemical Precipitation of Lead Using Biomaterials, Molecular Sieves, and Chlorides, Carbonates, and Sulfates of Na & Ca. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/jep.2013.411145] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Huang R, Yang B, Wang B, Zheng D, Zhang Z. Removal of chromium (VI) ions from aqueous solutions by N-2-hydroxypropyl trimethyl ammonium chloride chitosan–bentonite. DESALINATION AND WATER TREATMENT 2012; 50:329-337. [DOI: 10.1080/19443994.2012.720097] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
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28
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Kosmulski M. IEP as a parameter characterizing the pH-dependent surface charging of materials other than metal oxides. Adv Colloid Interface Sci 2012; 171-172:77-86. [PMID: 22364911 DOI: 10.1016/j.cis.2012.01.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 01/18/2012] [Accepted: 01/18/2012] [Indexed: 11/27/2022]
Abstract
The numerical values of points of zero charge (PZC, obtained by potentiometric titration) and of isoelectric points (IEP) of various materials reported in the literature have been analyzed. In sets of results reported for the same chemical compound (corresponding to certain chemical formula and crystallographic structure), the IEP are relatively consistent. In contrast, in materials other than metal oxides, the sets of PZC are inconsistent. In view of the inconsistence in the sets of PZC and of the discrepancies between PZC and IEP reported for the same material, it seems that IEP is more suitable than PZC as the unique number characterizing the pH-dependent surface charging of materials other than metal oxides. The present approach is opposite to the usual approach, in which the PZC and IEP are considered as two equally important parameters characterizing the pH-dependent surface charging of materials other than metal oxides.
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29
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Najafi M, Yousefi Y, Rafati A. Synthesis, characterization and adsorption studies of several heavy metal ions on amino-functionalized silica nano hollow sphere and silica gel. Sep Purif Technol 2012. [DOI: 10.1016/j.seppur.2011.10.011] [Citation(s) in RCA: 233] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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30
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Nicotera I, Enotiadis A, Angjeli K, Coppola L, Ranieri GA, Gournis D. Effective improvement of water-retention in nanocomposite membranes using novel organo-modified clays as fillers for high temperature PEMFCs. J Phys Chem B 2011; 115:9087-97. [PMID: 21671588 DOI: 10.1021/jp202954g] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Toward an enhanced water-retention of polymer electrolyte membranes at high temperatures, novel organo-modified clays were prepared and tested as fillers for the creation of hybrid Nafion nanocomposites. Two smectite clays (Laponite and montmorillonite), with different structural and physical parameters, were loaded with various cationic organic molecules bearing several hydrophilic functional groups (-NH(2), -OH, -SO(3)H) and incorporated in Nafion by solution intercalation. The resulted hybrid membranes were characterized by a combination of powder X-ray diffraction, FTIR spectroscopy, and thermal analysis (DTA/TGA) showing that highly homogeneous exfoliated nanocomposites were created where the individual organoclay layers are uniformly dispersed in the continuous polymeric matrix. In this paper, water-transport properties were investigated by NMR spectroscopy, including pulsed-field-gradient spin-echo diffusion and spectral measurements conducted under variable temperature. Organo-montmorillonite nanofillers demonstrate a considerable effect on the Nafion polymer in terms both of water absorption/retention and water mobility with a remarkable behavior in the region of high temperatures (100-130 °C), denoting that the surface modifications of this clay with acid organic molecules significantly improve the performance of the final composite membrane. (1)H NMR spectral analysis allowed a general description of the water distribution in the system and an estimation of the number of water molecules involved in the hydration shell of the sulfonic groups as well as that absorbed on the organoclay particles.
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Affiliation(s)
- Isabella Nicotera
- Department of Chemistry, University of Calabria, 87036 Rende, Cosenza, Italy.
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31
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Sarkar B, Xi Y, Megharaj M, Krishnamurti GSR, Rajarathnam D, Naidu R. Remediation of hexavalent chromium through adsorption by bentonite based Arquad® 2HT-75 organoclays. JOURNAL OF HAZARDOUS MATERIALS 2010; 183:87-97. [PMID: 20674167 DOI: 10.1016/j.jhazmat.2010.06.110] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2010] [Revised: 06/23/2010] [Accepted: 06/27/2010] [Indexed: 05/11/2023]
Abstract
Unlike hydrophobic organic pollutants, the potential of organoclays to adsorb inorganic ionic contaminants is relatively underexplored. The present study attempts to characterise bentonite (QB) based organoclays synthesised from a commercially available, low-cost alkyl ammonium surfactant Arquad® 2HT-75 (Aq) and test their ability to adsorb hexavalent chromium (Cr (VI)) in aqueous solution. XRD, FTIR and TGA characterisation techniques prove successful modification of the bentonite structure and reveal that higher surfactant loadings gives rise to more ordered surfactant conformation in the organoclays. The zeta potential values indicate that higher surfactant loadings also create positive charges on the organoclay surfaces. Detailed isothermal and kinetic studies show that the organoclays effectively remove hexavalent chromium (Cr (VI)) from aqueous solution by both physical and chemical adsorption processes. Higher surfactant loadings provide better adsorption efficiency. The adsorption performance is reasonably efficient under the levels of pH, temperature, electrolyte concentration and natural organic matter concentration that generally prevail in contaminated soil and water. This study shows that organoclay sorbents offer good potential for remediating Cr (VI) under real environmental conditions.
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Affiliation(s)
- Binoy Sarkar
- Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, Mawson Lakes, SA 5095, Australia
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Stathi P, Deligiannakis Y. Humic acid-inspired hybrid materials as heavy metal absorbents. J Colloid Interface Sci 2010; 351:239-47. [DOI: 10.1016/j.jcis.2010.06.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2010] [Revised: 06/07/2010] [Accepted: 06/11/2010] [Indexed: 10/19/2022]
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Vieira MGA, Neto AFA, Gimenes ML, da Silva MGC. Sorption kinetics and equilibrium for the removal of nickel ions from aqueous phase on calcined Bofe bentonite clay. JOURNAL OF HAZARDOUS MATERIALS 2010; 177:362-371. [PMID: 20042281 DOI: 10.1016/j.jhazmat.2009.12.040] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Revised: 12/07/2009] [Accepted: 12/07/2009] [Indexed: 05/28/2023]
Abstract
In this paper the kinetics and dynamics of nickel adsorption on calcined Bofe bentonite clay were studied. The clay was characterized through EDX, surface area (BET) and XRD analysis. The influence of parameters (pH, amount of adsorbent, adsorbate concentration and temperature) was investigated. Kinetic models were evaluated in order to identify potential adsorption process mechanisms. The Langmuir and Freundlich models were utilized for the analysis of adsorption equilibrium. Thermodynamic parameters were assessed as a function of the process temperature. The kinetics data were better represented by the second-order model. The process was found to be strongly influenced by the factors studied. The Bofe clay removed nickel with maximum adsorption capacity of 1.91 mg metal/g of clay (20 degrees C; pH 5.3) and that the thermodynamic data indicated that the adsorption reaction is spontaneous and of an exothermal nature. The Langmuir model provided the best fit for sorption isotherms.
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Vieira MGA, Almeida Neto AF, Gimenes ML, da Silva MGC. Removal of nickel on Bofe bentonite calcined clay in porous bed. JOURNAL OF HAZARDOUS MATERIALS 2010; 176:109-118. [PMID: 20022694 DOI: 10.1016/j.jhazmat.2009.10.128] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Revised: 10/29/2009] [Accepted: 10/30/2009] [Indexed: 05/28/2023]
Abstract
Bentonite clays have been showing good adsorbing characteristics and are used as an alternative material in the removal of heavy metals. The purpose of this study is to evaluate the removal of nickel on Bofe bentonite calcined clay in porous bed. Firstly, a study was conducted to define the operation outflow, based on the minimum mass transfer zone (MTZ) obtained, useful (q(U)) and total adsorbed (q(T)) removal amounts and total nickel removal percentage (Rem (%)). Assays of nickel adsorption on clay were conducted according to a 2(2) factorial design with three central points to evaluate the effect of the particle diameter and initial adsorbate concentration on variables q(U), q(T) and Rem (%). Tests to obtain the adsorbent physical and chemical characteristics were performed on samples of Bofe clay in natura, calcined, and calcined submitted to nickel adsorption. This clay was characterized according to the following techniques: Energy Dispersive Spectroscopy (EDS), Thermogravimetry (TG), Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD), Fourier Transformed Infrared Spectroscopy (FTIR), Physisorption of N(2) (BET), Helium Picnometry and Scanning Electron Microscope (SEM) with metal mapping.
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Stathi P, Dimos K, Karakassides MA, Deligiannakis Y. Mechanism of heavy metal uptake by a hybrid MCM-41 material: surface complexation and EPR spectroscopic study. J Colloid Interface Sci 2009; 343:374-80. [PMID: 20035949 DOI: 10.1016/j.jcis.2009.11.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Revised: 11/09/2009] [Accepted: 11/10/2009] [Indexed: 10/20/2022]
Abstract
A novel hybrid MCM-41-based material was synthesized by incorporation of AEDTC [N-(2-aminoethyl)dithiocarbamate] in the MCM-41 pores. The derived MCM-41 x AEDTC material possesses high AEDTC loading 35% [w:w], and a well-defined array of regular mesopores with a specific surface area of 632 m(2)/g. Heavy metal, Cd, Pb, Cu, and Zn, uptake was studied in detail at physiological pH values 6-8, by a combination of analytical and electron paramagnetic resonance (EPR) spectroscopic techniques. The analytical data show a significant improvement, i.e., 200-500%, for Pb, Cu, and Zn uptake by the MCM-41 x AEDTC hybrid vs the unmodified MCM-41. In contrast, Cd shows an exceptional behavior: (a) Cd uptake by MCM-41 x AEDTC is very low. (b) Competitive metal uptake experiments reveal that Cd ions cause a characteristic inhibition of Cu or Pb uptake by the MCM-41 x AEDTC while Cd binding itself always remained low. The present findings are analyzed by a combination of surface complexation modeling and EPR spectroscopy. Accordingly, in the MCM-41 x AEDTC the sulfur atoms of AEDTC provide strong binding sites for metal binding, with a stoichiometry [S(AEDTC)]:[Metal] = 1:1. Cd inhibits accessibility of Cu or Pb ions in the AEDTC sites.
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Affiliation(s)
- Panagiota Stathi
- Department of Environmental and Natural Resources Management, University of Ioannina, Seferi 2, 30100 Agrinio, Greece.
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Kosma C, Balomenou G, Salahas G, Deligiannakis Y. Electrolyte ion effects on Cd2+ binding at Al2O3 surface: specific synergism versus bulk effects. J Colloid Interface Sci 2008; 331:263-74. [PMID: 19101683 DOI: 10.1016/j.jcis.2008.11.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2008] [Revised: 11/05/2008] [Accepted: 11/06/2008] [Indexed: 10/21/2022]
Abstract
Cd(2+) binding on gamma-Al(2)O(3) was studied in the presence of the common electrolyte ions Mg(2+), SO(4)(2-), and NO(3)(-) at high and low concentrations. Direct measurements were performed for Cd(2+) as well as for electrolyte ion adsorption as a function of pH. The experimental data reveal that Cd(2+) binding on gamma-Al(2)O(3) is modulated by the electrolyte ions in a complex manner. At high electrolyte concentration, Cd(2+) uptake by gamma-Al(2)O(3) is inhibited. Theoretical analysis by a surface complexation model shows that this effect can be attributed partially to bulk, ionic strength, and effect of the electrolyte, but the most significant inhibition is due to direct competition between Mg(2+) and Cd(2+) ions for the [triple bond]SO(-) surface sites of gamma-Al(2)O(3). At low concentration of electrolyte ions, Cd(2+) uptake by gamma-Al(2)O(3) can be enhanced due to synergistic co-adsorption of Cd(2+) and electrolyte anions, particularly SO(4)(2-) and to a lesser extent NO(3)(-). The theoretical analysis shows that this co-adsorption is due to formation of ternary surface species ([triple bond]SOH(2)SO(4)Cd) and ([triple bond]SOH(2)NO(3)Cd) which enhance Cd-uptake at pH values well below the point of zero charge of the gamma-Al(2)O(3).
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Affiliation(s)
- Chariklia Kosma
- Department of Environmental and Natural Resources Management, University of Ioannina, Seferi 2, 30100 Agrinio, Greece
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Choi M, Jang J. Heavy metal ion adsorption onto polypyrrole-impregnated porous carbon. J Colloid Interface Sci 2008; 325:287-9. [DOI: 10.1016/j.jcis.2008.05.047] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2008] [Revised: 05/22/2008] [Accepted: 05/23/2008] [Indexed: 11/26/2022]
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Balomenou G, Stathi P, Enotiadis A, Gournis D, Deligiannakis Y. Physicochemical study of amino-functionalized organosilicon cubes intercalated in montmorillonite clay: H-binding and metal uptake. J Colloid Interface Sci 2008; 325:74-83. [DOI: 10.1016/j.jcis.2008.04.072] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2008] [Revised: 04/15/2008] [Accepted: 04/29/2008] [Indexed: 10/21/2022]
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