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Nonionic organoclay: A ‘Swiss Army knife’ for the adsorption of organic micro-pollutants? J Colloid Interface Sci 2015; 437:71-79. [DOI: 10.1016/j.jcis.2014.09.043] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 08/05/2014] [Accepted: 09/16/2014] [Indexed: 11/21/2022]
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Liu X, Wang F, Bai S. Kinetics and equilibrium adsorption study of p-nitrophenol onto activated carbon derived from walnut peel. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2015; 72:2229-2235. [PMID: 26676011 DOI: 10.2166/wst.2015.453] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
An original activated carbon prepared from walnut peel, which was activated by zinc chloride, was modified with ammonium hydroxide or sodium hydroxide in order to contrast the adsorption property of the three different activated carbons. The experiment used a static adsorption test for p-nitrophenol. The effects of parameters such as initial concentration, contact time and pH value on amount adsorbed and removal are discussed in depth. The thermodynamic data of adsorption were analyzed by Freundlich and Langmuir models. The kinetic data of adsorption were measured by the pseudo-first-order kinetics and the pseudo-second-order kinetics models. The results indicated that the alkalized carbon samples derived from walnut peel had a better performance than the original activated carbon treated with zinc chloride. It was found that adsorption equilibrium time was 6 h. The maximum removal rate of activated carbon treated with zinc chloride for p-nitrophenol was 87.3% at pH 3,whereas the maximum removal rate of the two modified activated carbon materials was found to be 90.8% (alkalized with ammonium hydroxide) and 92.0% (alkalized with sodium hydroxide) at the same pH. The adsorption data of the zinc chloride activated carbon were fitted to the Langmuir isotherm model. The two alkalized activated carbon samples were fitted well to the Freundlich model. The pseudo-second-order dynamics equation provided better explanation of the adsorption dynamics data of the three activated carbons than the pseudo-first-order dynamics equation.
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Affiliation(s)
- Xiaohong Liu
- College of Chemistry & Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China E-mail:
| | - Fang Wang
- College of Chemistry & Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China E-mail:
| | - Song Bai
- College of Chemistry & Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China E-mail:
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Okoli CP, Adewuyi GO, Zhang Q, Diagboya PN, Guo Q. Mechanism of dialkyl phthalates removal from aqueous solution using γ-cyclodextrin and starch based polyurethane polymer adsorbents. Carbohydr Polym 2014; 114:440-449. [DOI: 10.1016/j.carbpol.2014.08.016] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 07/25/2014] [Accepted: 08/11/2014] [Indexed: 11/25/2022]
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Trujillo-Reyes J, Peralta-Videa JR, Gardea-Torresdey JL. Supported and unsupported nanomaterials for water and soil remediation: are they a useful solution for worldwide pollution? JOURNAL OF HAZARDOUS MATERIALS 2014; 280:487-503. [PMID: 25203809 DOI: 10.1016/j.jhazmat.2014.08.029] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 07/25/2014] [Accepted: 08/07/2014] [Indexed: 06/03/2023]
Abstract
Remediation technologies for wastes generated by industrial processes include coagulation, reverse osmosis, electrochemistry, photoelectrochemistry, advanced oxidation processes, and biological methods, among others. Adsorption onto activated carbon, sewage sludge, zeolites, chitosan, silica, and agricultural wastes has shown potential for pollutants' removal from aqueous media. Recently, nanoscale systems [nanoparticles (NPs) supported on different inorganic adsorbents] have shown additional benefits for the removal/degradation of several contaminants. According to the literature, NPs enhance the adsorption capacity of adsorbent materials and facilitate degradation of pollutants through redox reactions. In this review we analyzed relevant literature from 2011 to 2013, dealing with water and soil remediation by nanomaterials (NMs), either unsupported or supported upon inorganic adsorbents. Despite the outstanding reported results for some NMs, the analysis of the literature makes clear the necessity of more studies. There is lack of information about NMs regeneration and reusability, their large-scale application, and their efficiency in actual industrial wastewaters and contaminated soils. Additionally, little is known about NMs' life cycle, release of metal ions, disposal of pollutant loaded NMs, and their impacts on different ecosystems.
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Affiliation(s)
- J Trujillo-Reyes
- Chemistry Department, The University of Texas at El Paso, 500 West Univ. Ave., El Paso, TX 79968, USA
| | - J R Peralta-Videa
- Chemistry Department, The University of Texas at El Paso, 500 West Univ. Ave., El Paso, TX 79968, USA; Environmental Science and Engineering PhD Program, The University of Texas at El Paso, 500 West Univ. Ave., El Paso, TX 79968, USA; University of California Center for Environmental Implications of Nanotechnology (UC CEIN), The University of Texas at El Paso, 500 West Univ. Ave., El Paso, TX 79968, USA
| | - J L Gardea-Torresdey
- Chemistry Department, The University of Texas at El Paso, 500 West Univ. Ave., El Paso, TX 79968, USA; Environmental Science and Engineering PhD Program, The University of Texas at El Paso, 500 West Univ. Ave., El Paso, TX 79968, USA; University of California Center for Environmental Implications of Nanotechnology (UC CEIN), The University of Texas at El Paso, 500 West Univ. Ave., El Paso, TX 79968, USA.
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55
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Liu X, Lee DJ. Thermodynamic parameters for adsorption equilibrium of heavy metals and dyes from wastewaters. BIORESOURCE TECHNOLOGY 2014; 160:24-31. [PMID: 24461254 DOI: 10.1016/j.biortech.2013.12.053] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 12/09/2013] [Accepted: 12/12/2013] [Indexed: 05/27/2023]
Abstract
This meta-analysis evaluates adsorption studies that report thermodynamic parameters for heavy metals and dyes from wastewaters. The adsorbents were derived from agricultural waste, industrial wastes, inorganic particulates, or some natural products. The adsorption mechanisms, derivation of thermodynamic relationships, and possible flaws made in such evaluation are discussed. This analysis shows that conclusions from the examined standard enthalpy and entropy changes are highly contestable. The reason for this flaw may be the poor physical structure of adsorbents tested, such that pore transport controlled the solute flux, leaving a surface reaction process near equilibrium.
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Affiliation(s)
- Xiang Liu
- Department of Environmental Engineering, Fudan University, Shanghai, China; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Duu-Jong Lee
- Department of Environmental Engineering, Fudan University, Shanghai, China; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan; Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan.
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56
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Surface molecularly imprinted polymers with synthetic dummy template for simultaneously selective recognition of nine phthalate esters. J Chromatogr A 2014; 1330:6-13. [DOI: 10.1016/j.chroma.2014.01.008] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 01/03/2014] [Accepted: 01/07/2014] [Indexed: 12/15/2022]
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57
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Application of quantum descriptors for predicting adsorption performance of starch and cyclodextrin adsorbents. Carbohydr Polym 2014; 101:40-9. [DOI: 10.1016/j.carbpol.2013.08.065] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 08/19/2013] [Accepted: 08/23/2013] [Indexed: 11/21/2022]
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58
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Lambert S, Sinclair C, Boxall A. Occurrence, degradation, and effect of polymer-based materials in the environment. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2014; 227:1-53. [PMID: 24158578 DOI: 10.1007/978-3-319-01327-5_1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
There is now a plethora of polymer-based materials (PBMs) on the market, because of the increasing demand for cheaper consumable goods, and light-weight industrial materials. Each PBM constitutes a mixture of their representative polymer/sand their various chemical additives. The major polymer types are polyethylene, polypropylene,and polyvinyl chloride, with natural rubber and biodegradable polymers becoming increasingly more important. The most important additives are those that are biologically active, because to be effective such chemicals often have properties that make them resistant to photo-degradation and biodegradation. During their lifecycle,PBMs can be released into the environment form a variety of sources. The principal introduction routes being general littering, dumping of unwanted waste materials,migration from landfills and emission during refuse collection. Once in the environment,PBMs are primarily broken down by photo-degradation processes, but due to the complex chemical makeup of PBMs, receiving environments are potentially exposed to a mixture of macro-, meso-, and micro-size polymer fragments, leached additives, and subsequent degradation products. In environments where sunlight is absent (i.e., soils and the deep sea) degradation for most PBMs is minimal .The majority of literature to date that has addressed the environmental contamination or disposition of PBMs has focused on the marine environment. This is because the oceans are identified as the major sink for macro PBMs, where they are known to present a hazard to wildlife via entanglement and ingestion. The published literature has established the occurrence of microplastics in marine environment and beach sediments, but is inadequate as regards contamination of soils and freshwater sediments. The uptake of microplastics for a limited range of aquatic organisms has also been established, but there is a lack of information regarding soil organisms, and the long-term effects of microplastic uptake are also less well understood.There is currently a need to establish appropriate degradation test strategies consistent with realistic environmental conditions, because the complexity of environmental systems is lost when only one process (e.g., hydrolysis) is assessed in isolation. Enhanced methodologies are also needed to evaluate the impact of PBMs to soil and freshwater environments.
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Affiliation(s)
- Scott Lambert
- The University of York, Heslington Road, York, YO10 5DD, UK,
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59
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Reddy DHK, Lee SM. Application of magnetic chitosan composites for the removal of toxic metal and dyes from aqueous solutions. Adv Colloid Interface Sci 2013; 201-202:68-93. [PMID: 24182685 DOI: 10.1016/j.cis.2013.10.002] [Citation(s) in RCA: 316] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 10/03/2013] [Accepted: 10/03/2013] [Indexed: 02/04/2023]
Abstract
Magnetic chitosan composites (MCCs) are a novel material that exhibits good sorption behavior toward various toxic pollutants in aqueous solution. These magnetic composites have a fast adsorption rate and high adsorption efficiency, efficient to remove various pollutants and they are easy to recover and reuse. These features highlight the suitability of MCCs for the treatment of water polluted with metal and organic materials. This review outlines the preparation of MCCs as well as methods to characterize these materials using FTIR, XRD, TGA and other microscopy-based techniques. Additionally, an overview of recent developments and applications of MCCs for metal and organic pollutant removal is discussed in detail. Based on current research and existing materials, some new and futuristic approaches in this fascinating area are also discussed. The main objective of this review is to provide up-to-date information about the most important features of MCCs and to show their advantages as adsorbents in the treatment of polluted aqueous solutions.
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Srinivasan R. Natural Polysaccharides as Treatment Agents for Wastewater. GREEN MATERIALS FOR SUSTAINABLE WATER REMEDIATION AND TREATMENT 2013. [DOI: 10.1039/9781849735001-00051] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
This chapter gives an account of recent developments in biopolymers with an emphasis on natural polysaccharides as treatment agents in wastewater remediation. Almost all sources of water around the world are polluted to some degree, owing to a heavy influx of industrial effluents, domestic and agricultural wastes. These discharges vary from simple nutrients to highly toxic hazardous chemicals. Numerous approaches have been studied for the development of cheaper and more effective water remediation agents containing natural polymers. Among these, natural polysaccharides deserve particular attention. These materials have proved to be better treatment alternatives compared to their synthetic counterparts because of their particular structure, physicochemical characteristics, chemical stability, high reactivity and excellent selectivity towards aromatic compounds, metals and other contaminants that cause water pollution.
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Affiliation(s)
- Rajani Srinivasan
- Department of Chemistry Geosciences and Physics, College of Science and Technology, Tarleton State University, Stephenville, TX 76401 USA
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61
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Rodrigues NFM, Santana SAA, Bezerra CWB, Silva HAS, Melo JCP, Vieira AP, Airoldi C, Silva Filho EC. New Chemical Organic Anhydride Immobilization Process Used on Banana Pseudostems: A Biopolymer for Cation Removal. Ind Eng Chem Res 2013. [DOI: 10.1021/ie303409b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nubia F. M. Rodrigues
- Chemistry Department/CCET, Federal University of Maranhão, Av. dos Portugueses
S/N, Campus do Bacanga, 65080-540 São Luís, MA, Brazil
| | - Sirlane A. A. Santana
- Chemistry Department/CCET, Federal University of Maranhão, Av. dos Portugueses
S/N, Campus do Bacanga, 65080-540 São Luís, MA, Brazil
| | - Cícero W. B. Bezerra
- Chemistry Department/CCET, Federal University of Maranhão, Av. dos Portugueses
S/N, Campus do Bacanga, 65080-540 São Luís, MA, Brazil
| | - Hildo A. S. Silva
- Chemistry Department/CCET, Federal University of Maranhão, Av. dos Portugueses
S/N, Campus do Bacanga, 65080-540 São Luís, MA, Brazil
| | - Júlio C. P. Melo
- Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-971
Campinas, SP, Brazil
| | - Adriana P. Vieira
- Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-971
Campinas, SP, Brazil
| | - Claudio Airoldi
- Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-971
Campinas, SP, Brazil
| | - Edson C. Silva Filho
- Interdisciplinay
Laboratory from
Advanced Materials, CCN, Federal University of Piauí, 64049-550 Teresina, PI, Brazil
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Sun H, Jiang F, Chen L, Zheng J, Wu Y, Liu M. Determination of Three Phthalate Esters in Environmental Samples by Coal Cinder Extraction and Cyclodextrin Modified Micellar Electrokinetic Chromatography. J Chromatogr Sci 2013; 52:547-52. [DOI: 10.1093/chromsci/bmt078] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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63
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Chalasani R, Vasudevan S. Cyclodextrin-functionalized Fe3O4@TiO2: reusable, magnetic nanoparticles for photocatalytic degradation of endocrine-disrupting chemicals in water supplies. ACS NANO 2013; 7:4093-4104. [PMID: 23600646 DOI: 10.1021/nn400287k] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Water-dispersible, photocatalytic Fe3O4@TiO2 core-shell magnetic nanoparticles have been prepared by anchoring cyclodextrin cavities to the TiO2 shell, and their ability to capture and photocatalytically destroy endocrine-disrupting chemicals, bisphenol A and dibutyl phthalate, present in water, has been demonstrated. The functionalized nanoparticles can be magnetically separated from the dispersion after photocatalysis and hence reused. Each component of the cyclodextrin-functionalized Fe3O4@TiO2 core-shell nanoparticle has a crucial role in its functioning. The tethered cyclodextrins are responsible for the aqueous dispersibility of the nanoparticles and their hydrophobic cavities for the capture of the organic pollutants that may be present in water samples. The amorphous TiO2 shell is the photocatalyst for the degradation and mineralization of the organics, bisphenol A and dibutyl phthalate, under UV illumination, and the magnetism associated with the 9 nm crystalline Fe3O4 core allows for the magnetic separation from the dispersion once photocatalytic degradation is complete. An attractive feature of these "capture and destroy" nanomaterials is that they may be completely removed from the dispersion and reused with little or no loss of catalytic activity.
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Affiliation(s)
- Rajesh Chalasani
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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64
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Gao B, Wang P, Zhou H, Zhang Z, Wu F, Jin J, Kang M, Sun K. Sorption of phthalic acid esters in two kinds of landfill leachates by the carbonaceous sorbents. BIORESOURCE TECHNOLOGY 2013; 136:295-301. [PMID: 23567694 DOI: 10.1016/j.biortech.2013.03.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 03/02/2013] [Accepted: 03/06/2013] [Indexed: 06/02/2023]
Abstract
Sorption of phthalic acid esters (PAEs: diethyl phthalate, DEP: dibutyl phthalate, DBP as model compounds) in landfill leachates by activated carbon (AC), carbon nanotubes (CNTs), and biochars, were examined. The young leachate (YL) and old leachate (OL) were synthesized to imitate acetogenic and methanogenic phases, respectively, and glucose (GLU) and fulvic acid (FA) were selected to represent dissolved organic matter (DOM). GLU in leachates generally facilitated the sorption of PAEs while FA restrained sorption of PAEs, suggesting the type of DOM associated with leachates possibly regulated the removal efficiency of PAEs from leachates. The pores and organic carbon of carbonaceous sorbents should be major factors in influencing the sorption of PAEs in leachates. The data showed PAEs in acetogenic leachates was removed more easily than those in methanogenic leachates and CNTs have the less advantage to remove PAEs from methanogenic leachates compared to AC.
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Affiliation(s)
- Bo Gao
- State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
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Osman B, Özer ET, Demirbel E, Güçer Ş, Beşirli N. Synthesis and characterization of L-tryptophan containing microbeads for removal of dimethyl phthalate from aqueous phase. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2013.02.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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