51
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Wool Carpet Dye Adsorption on Nanoporous Carbon Materials Derived from Agro-Product. C — JOURNAL OF CARBON RESEARCH 2017. [DOI: 10.3390/c3020012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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52
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He X, Elkouz M, Inyang M, Dickenson E, Wert EC. Ozone regeneration of granular activated carbon for trihalomethane control. JOURNAL OF HAZARDOUS MATERIALS 2017; 326:101-109. [PMID: 28011354 DOI: 10.1016/j.jhazmat.2016.12.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 12/07/2016] [Accepted: 12/08/2016] [Indexed: 06/06/2023]
Abstract
Spatial and temporal variations of trihalomethanes (THMs) in distribution systems have challenged water treatment facilities to comply with disinfection byproduct rules. In this study, granular activated carbon (GAC) and modified GAC (i.e., Ag-GAC and TiO2-GAC) were used to treat chlorinated tap water containing CHCl3 (15-21μg/L), CHBrCl2 (13-16μg/L), CHBr2Cl (13-14μg/L), and CHBr3 (3μg/L). Following breakthrough of dissolved organic carbon (DOC), GAC were regenerated using conventional and novel methods. GAC regeneration efficiency was assessed by measuring adsorptive (DOC, UV absorbance at 254nm, and THMs) and physical (surface area and pore volume) properties. Thermal regeneration resulted in a brief period of additional DOC adsorption (bed volume, BV, ∼6000), while ozone regeneration was ineffective regardless of the GAC type. THM adsorption was restored by either method (e.g., BV for ≥80% breakthrough, CHBr3 ∼44,000>CHBr2Cl ∼35,000>CHBrCl2 ∼31,000>CHCl3 ∼7000). Cellular and attached adenosine triphosphate measurements illustrated the antimicrobial effects of Ag-GAC, which may have allowed for the extended THM adsorption compared to the other GAC types. The results illustrate that ozone regeneration may be a viable in-situ alternative for the adsorption of THMs during localized treatment in drinking water distribution systems.
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Affiliation(s)
- Xuexiang He
- Southern Nevada Water Authority (SNWA), P.O. Box 99954, Las Vegas, NV 89193-9954, United States.
| | - Mark Elkouz
- University of Nevada, Las Vegas, Department of Civil and Environmental Engineering and Construction, Las Vegas, NV 89154, United States
| | - Mandu Inyang
- Southern Nevada Water Authority (SNWA), P.O. Box 99954, Las Vegas, NV 89193-9954, United States
| | - Eric Dickenson
- Southern Nevada Water Authority (SNWA), P.O. Box 99954, Las Vegas, NV 89193-9954, United States
| | - Eric C Wert
- Southern Nevada Water Authority (SNWA), P.O. Box 99954, Las Vegas, NV 89193-9954, United States.
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53
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Wei GX, Liu HQ, Zhang R, Zhu YW, Xu X, Zang DD. Application of microwave energy in the destruction of dioxins in the froth product after flotation of hospital solid waste incinerator fly ash. JOURNAL OF HAZARDOUS MATERIALS 2017; 325:230-238. [PMID: 27940112 DOI: 10.1016/j.jhazmat.2016.11.078] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 11/23/2016] [Accepted: 11/30/2016] [Indexed: 06/06/2023]
Abstract
Most of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) and powder-activated carbon (PAC) in hospital solid waste incinerator fly ash are enriched in the froths produced through flotation. Because PAC is an excellent microwave absorber, microwave treatment was performed on the froths in this study to decompose PCDD/Fs. The results showed that the destruction efficiency of PCDD/Fs increased with increasing microwave incident power and processing time, particularly for highly chlorinated PCDD/Fs. With a microwave incident power of 2100W at 7min, the total mass destruction efficiency of the PCDD/Fs in the froths reached 99.6wt.% and the total toxic equivalent (TEQ) of PCDD/F was substantially reduced from 29.0 to 0.08 ng-I-TEQ/g. PCDD/Fs in the froths were mostly decomposed and evaporated very little into exhaust gas under microwave treatment, especially at 2100W. The treated froths displayed good porous structures, enabling the potential recovery of PAC for reuse. Microwave treatment of the froths could promote the rapid decomposition of PCDD/Fs and the recovery of a typical waste resource; also it could present a viable alternative to combustion treatment for the froths.
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Affiliation(s)
- Guo-Xia Wei
- School of Science, Tianjin Chengjian University, 300384 Tianjin, China
| | - Han-Qiao Liu
- School of Energy and Safety Engineering, Tianjin Chengjian University, 300384 Tianjin, China; Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, 300384 Tianjin, China.
| | - Rui Zhang
- School of Energy and Safety Engineering, Tianjin Chengjian University, 300384 Tianjin, China
| | - Yu-Wen Zhu
- School of Energy and Safety Engineering, Tianjin Chengjian University, 300384 Tianjin, China
| | - Xian Xu
- School of Energy and Safety Engineering, Tianjin Chengjian University, 300384 Tianjin, China
| | - Dan-Dan Zang
- School of Energy and Safety Engineering, Tianjin Chengjian University, 300384 Tianjin, China
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54
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Duan X, Srinivasakannan C, Wang X, Wang F, Liu X. Synthesis of activated carbon fibers from cotton by microwave induced H3PO4 activation. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2016.10.036] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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55
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Donat R, Erden KE. Adsorption of U(VI) ions from aqueous solutions by activated carbon prepared from Antep pistachio (Pistacia vera L.) shells. RADIOCHIM ACTA 2016. [DOI: 10.1515/ract-2016-2637] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Antep pistachio (Pistacia vera L.) shells an abundant and low cost natural resource in Turkey was used to prepare activated carbon by physiochemical activation and carbon dioxide (CO2) atmosphere as the activating agents at 700°C for 2 h. The adsorption equilibrium of U(VI) from aqueous solutions on such carbon has been studied using a batch system. The parameters that affect the U(VI) adsorption, such as particle size of adsorbent, contact time, of pH of the solution, and temperature, have been investigated and conditions have also been optimized. The equilibrium data for U(VI) ions’ adsorption onto activated carbon well fitted to the Langmuir equation, with a maximum monolayer adsorption capacity of 8.68 mg/g, The Freundlich and Dubinin–Radushkevich (D–R) isotherms have been applied and the data correlated well with Freundlich model and that the adsorption is physical in nature (Ea
=15.46 kJ/mol). Thermodynamic parameters [ΔHs
=11.33 kJ/mol, ΔS=0.084 kJ/molK, ΔG (293.15 K)=−13.29 kJ/mol] showed the endothermic heat of adsorption and the feasibility of the process.
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Affiliation(s)
- Ramazan Donat
- Pamukkale University, Faculty of Science and Arts, Department of Chemistry, 20070, Denizli, Turkey , Tel.: +90 258 2963602, Fax: +90 258 2963535
| | - Kadriye Esen Erden
- Denizli Vocational School of Technical Sciences, Pamukkale University, 20160 Kınıklı–Denizli, Turkey
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56
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Minute-made activated porous carbon from agro-waste for Li-ion battery anode using a low power microwave oven. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.07.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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57
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Durán-Jiménez G, Hernández-Montoya V, Montes-Morán M, Rangel-Méndez J, Tovar-Gómez R. Study of the adsorption-desorption of Cu2+, Cd2+ and Zn2+ in single and binary aqueous solutions using oxygenated carbons prepared by Microwave Technology. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.05.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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58
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Zhang L, Cui L, Wang Z, Dong Y. Modification of Activated Carbon Using Microwave Radiation and Its Effects on the Adsorption of SO 2. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2016. [DOI: 10.1252/jcej.14we081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Liqiang Zhang
- National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University
| | - Lin Cui
- National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University
| | - Zhiqiang Wang
- National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University
| | - Yong Dong
- National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University
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59
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Pan RR, Fan FL, Li Y, Jin XJ. Microwave regeneration of phenol-loaded activated carbons obtained from Arundo donax and waste fiberboard. RSC Adv 2016. [DOI: 10.1039/c6ra01642a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A study was performed for the microwave regeneration of Arundo donax activated carbon (ADAC) and waste fiberboard activated carbon (WFAC) loaded with phenol.
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Affiliation(s)
- R. R. Pan
- Beijing Key Laboratory of Lignocellulosic Chemistry
- MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy
- Beijing Forestry University
- Beijing
- China
| | - F. L. Fan
- Beijing Key Laboratory of Lignocellulosic Chemistry
- MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy
- Beijing Forestry University
- Beijing
- China
| | - Y. Li
- Beijing Key Laboratory of Lignocellulosic Chemistry
- MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy
- Beijing Forestry University
- Beijing
- China
| | - X. J. Jin
- Beijing Key Laboratory of Lignocellulosic Chemistry
- MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy
- Beijing Forestry University
- Beijing
- China
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60
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Zheng T, Wang Q, Shi Z, Zhang Z, Ma Y. Microwave regeneration of spent activated carbon for the treatment of ester-containing wastewater. RSC Adv 2016. [DOI: 10.1039/c6ra05211h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, an integrated granular activated carbon (GAC) adsorption/microwave (MW) irradiation process was used for the treatment of ester-containing wastewater from a lithium-ion battery (LIB) factory.
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Affiliation(s)
- Tianlong Zheng
- Department of Environmental Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
- Research Center for Eco-Environmental Sciences
| | - Qunhui Wang
- Department of Environmental Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants
| | - Zhining Shi
- School of Earth and Environmental Sciences
- The University of Adelaide
- South Australia 5005
- Australia
| | - Zhihui Zhang
- Department of Environmental Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Yuhui Ma
- Department of Environmental Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
- Institute of Tianjin Seawater Desalination and Multi-purpose Utilization
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61
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Hu E, Hu Y, Cheng H. Performance of a novel microwave-based treatment technology for atrazine removal and destruction: Sorbent reusability and chemical stability, and effect of water matrices. JOURNAL OF HAZARDOUS MATERIALS 2015; 299:444-452. [PMID: 26241770 DOI: 10.1016/j.jhazmat.2015.07.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 06/22/2015] [Accepted: 07/12/2015] [Indexed: 06/04/2023]
Abstract
Transition metal-exchanged dealuminated Y zeolites were used to adsorb atrazine from aqueous solutions, followed by regeneration of the sorbents and destruction of the sorbed atrazine with microwave irradiation. Exchange of copper and iron into the zeolite's micropores significantly enhanced its sorption capacity and selectivity toward atrazine, and increased the microwave-induced degradation rate of the sorbed atrazine by 3-4-folds. Both the copper- and iron-exchanged zeolites could be regenerated and reused multiple times, while the catalytic activity of the latter was more robust due to the much greater chemical stability of Fe(3+) species in the micropores. The presence of humic acid, and common cations and anions had little impact on the sorption of atrazine on the transition metal-exchanged zeolites. In the treatment of atrazine spiked in natural surface water and groundwater samples, sorptive removal of atrazine was found to be impacted by the level of dissolved organic carbon, probably through competition for the micropore spaces and pore blocking, while the water matrices exhibited no strong effect on the microwave-induced degradation of sorbed atrazine. Overall, iron-exchanged dealuminated Y zeolites show great potential for removal and destruction of atrazine from contaminated surface water and groundwater in practical implementation of the novel treatment technology.
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Affiliation(s)
- Erdan Hu
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Yuanan Hu
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Hefa Cheng
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
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62
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The use of microwave radiation for obtaining carbonaceous adsorbents from biomass and their use in elimination of inorganic pollutants. ADSORPTION 2015. [DOI: 10.1007/s10450-015-9713-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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63
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Li X, Yang F, Li P, Yang X, He J, Wang H, Lv P. Optimization of preparation process of activated carbon from chestnut burs assisted by microwave and pore structural characterization analysis. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2015; 65:1297-1305. [PMID: 26284756 DOI: 10.1080/10962247.2015.1083493] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
UNLABELLED In this study, activated carbon was prepared from Chinese chestnut burs assisted by microwave irradiation with potassium hydroxide (KOH) as activator, and the process conditions were optimized employing Box-Behnken design (BBD) and response surface methodology (RSM). The optimized variables were irradiation time, impregnation time, and mass ratio of alkali-to-carbon, and the iodine adsorption value was used to evaluate the adsorption property of activated carbon. The optimal preparation conditions were determined as follows: irradiation time 17 min, impregnation time 240 min, and mass ratio of alkali-to-char 1.5:1. Meanwhile, the relatively high iodine adsorption value (1141.4 mg/g) was also obtained. Furthermore, the pore structural characterization of activated carbon was analyzed. The analyzed results showed a larger Brunauer-Emmett-Teller (BET) specific surface area (1254.5 m(2)/g) and a higher microporosity ratio (87.2%), a bigger total pore volume (0.6565 m(3)/g), but a smaller average pore size (2.093 nm), which demonstrated the obtained activated carbon possessed strong adsorption capacity and well-developed microporous structure. This research could not only establish the foundation of utilizing chestnut burs to prepare activated carbon, but also provide the basis for exploitation of Chinese chestnut by-products. IMPLICATIONS Because Chinese chestnut burs are the by-products and usually discarded upon harvesting subsequently, the utilization of chestnut burs as a potential source of activated carbon is of great profit to the chestnut processing industries.
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Affiliation(s)
- Xiuhong Li
- a College of Forestry , Northwest A & F University , Yangling , People's Republic of China
| | - Fangxia Yang
- a College of Forestry , Northwest A & F University , Yangling , People's Republic of China
| | - Peiqin Li
- a College of Forestry , Northwest A & F University , Yangling , People's Republic of China
| | - Xiuping Yang
- a College of Forestry , Northwest A & F University , Yangling , People's Republic of China
| | - Jialin He
- a College of Forestry , Northwest A & F University , Yangling , People's Republic of China
| | - Hongzhe Wang
- a College of Forestry , Northwest A & F University , Yangling , People's Republic of China
| | - Pinghui Lv
- a College of Forestry , Northwest A & F University , Yangling , People's Republic of China
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64
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Schwenke AM, Hoeppener S, Schubert US. Synthesis and Modification of Carbon Nanomaterials utilizing Microwave Heating. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:4113-4141. [PMID: 26087742 DOI: 10.1002/adma.201500472] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 04/08/2015] [Indexed: 06/04/2023]
Abstract
Microwave-assisted synthesis and processing represents a growing field in materials research and successfully entered the field of carbon nanomaterials during the last decade. Due to the strong interaction of carbon materials with microwave radiation, fast heating rates and localized heating can be achieved. These features enable the acceleration of reaction processes, as well as the formation of nanostructures with special morphologies. A comprehensive overview is provided here on the possibilities and achievements in the field of carbon-nanomaterial research when using microwave-based heating approaches. This includes the synthesis and processing of carbon nanotubes and fibers, graphene materials, carbon nanoparticles, and capsules, as well as porous carbon materials. Additionally, the principles of microwave-heating, in particular of carbon materials, are introduced and important issues, i.e., safety and reproducibility, are discussed.
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Affiliation(s)
- Almut M Schwenke
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, D-07743, Jena, Germany
- Center for Energy and Environmental Chemistry (CEEC) Jena, Friedrich Schiller University Jena, Philosophenweg 7a, D-07743, Jena, Germany
| | - Stephanie Hoeppener
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, D-07743, Jena, Germany
- Center for Energy and Environmental Chemistry (CEEC) Jena, Friedrich Schiller University Jena, Philosophenweg 7a, D-07743, Jena, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstrasse 10, D-07743, Jena, Germany
- Center for Energy and Environmental Chemistry (CEEC) Jena, Friedrich Schiller University Jena, Philosophenweg 7a, D-07743, Jena, Germany
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65
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Derbalah A, El-Safty SA, Shenashen MA, Abdel Ghany NA. Mesoporous Alumina Nanoparticles as Host Tunnel-like Pores for Removal and Recovery of Insecticides from Environmental Samples. Chempluschem 2015; 80:1119-1126. [DOI: 10.1002/cplu.201500098] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Indexed: 11/07/2022]
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66
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67
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Hoseinzadeh Hesas R, Arami-Niya A, Wan Daud WMA, Sahu J. Microwave-assisted production of activated carbons from oil palm shell in the presence of CO2 or N2 for CO2 adsorption. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.09.029] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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68
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Gamba M, Flores FM, Madejová J, Torres Sánchez RM. Comparison of Imazalil Removal onto Montmorillonite and Nanomontmorillonite and Adsorption Surface Sites Involved: An Approach for Agricultural Wastewater Treatment. Ind Eng Chem Res 2015. [DOI: 10.1021/ie5035804] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Martina Gamba
- CETMIC−CCT
La Plata, CICBA. Camino Centenario
y 506, 1897 M. B.
Gonnet, La Plata, Argentina
| | - Federico M. Flores
- CETMIC−CCT
La Plata, CICBA. Camino Centenario
y 506, 1897 M. B.
Gonnet, La Plata, Argentina
| | - Jana Madejová
- Institute
of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská
cesta 9, 845 36 Bratislava, Slovakia
| | - Rosa M. Torres Sánchez
- CETMIC−CCT
La Plata, CICBA. Camino Centenario
y 506, 1897 M. B.
Gonnet, La Plata, Argentina
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69
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Mao H, Zhou D, Hashisho Z, Wang S, Chen H, Wang H(H. Constant power and constant temperature microwave regeneration of toluene and acetone loaded on microporous activated carbon from agricultural residue. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.03.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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70
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Chandraboss VL, Kamalakkannan J, Prabha S, Senthilvelan S. An efficient removal of methyl violet from aqueous solution by an AC-Bi/ZnO nanocomposite material. RSC Adv 2015. [DOI: 10.1039/c4ra14463e] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The hetero-junctions that are formed between the AC-Bi and ZnO, Bi provide an internal electric field that facilitates separation of the electron–hole pairs and induces faster carrier migration. Thus they often enhanced photocatalytic activity.
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Affiliation(s)
- V. L. Chandraboss
- Department of Chemistry
- Annamalai University
- Annamalainagar 608 002
- India
| | - J. Kamalakkannan
- Department of Chemistry
- Annamalai University
- Annamalainagar 608 002
- India
| | - S. Prabha
- Department of Chemistry
- Annamalai University
- Annamalainagar 608 002
- India
| | - S. Senthilvelan
- Department of Chemistry
- Annamalai University
- Annamalainagar 608 002
- India
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71
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Mao H, Zhou D, Hashisho Z, Wang S, Chen H, Wang H(H, Lashaki MJ. Microporous activated carbon from pinewood and wheat straw by microwave-assisted KOH treatment for the adsorption of toluene and acetone vapors. RSC Adv 2015. [DOI: 10.1039/c5ra01320h] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pore size distribution of raw char, pinewood char activated with KOH/char mass ratios 0.5, 1.5 and 3.0 was explored.
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Affiliation(s)
- Haiyan Mao
- College of Materials Science and Engineering
- Nanjing Forestry University
- Nanjing
- China
- Department of Civil and Environmental Engineering
| | - Dingguo Zhou
- College of Materials Science and Engineering
- Nanjing Forestry University
- Nanjing
- China
| | - Zaher Hashisho
- Department of Civil and Environmental Engineering
- University of Alberta
- Edmonton
- Canada
| | | | - Heng Chen
- Department of Civil and Environmental Engineering
- University of Alberta
- Edmonton
- Canada
| | - Haiyan (Helena) Wang
- Department of Civil and Environmental Engineering
- University of Alberta
- Edmonton
- Canada
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72
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Hsu SH, Huang CS, Chung TW, Gao S. Adsorption of chlorinated volatile organic compounds using activated carbon made from Jatropha curcas seeds. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2014.05.028] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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73
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Zanella O, Tessaro IC, Féris LA. Desorption- and Decomposition-Based Techniques for the Regeneration of Activated Carbon. Chem Eng Technol 2014. [DOI: 10.1002/ceat.201300808] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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74
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Xin-hui D, Srinivasakannan C, Jin-sheng L. Process optimization of thermal regeneration of spent coal based activated carbon using steam and application to methylene blue dye adsorption. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2013.10.019] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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75
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Wang H, Ma H, Zheng W, An D, Na C. Multifunctional and recollectable carbon nanotube ponytails for water purification. ACS APPLIED MATERIALS & INTERFACES 2014; 6:9426-9434. [PMID: 24806877 DOI: 10.1021/am501810f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Carbon nanotubes (CNTs) are promising nanomaterials that have the potential to revolutionize water treatment practices in the future. The direct use of unbounded CNTs, however, poses health risks to humans and ecosystems because they are difficult to separate from treated water. Here, we report the design and synthesis of carbon nanotube ponytails (CNPs) by integrating CNTs into micrometer-sized colloidal particles, which greatly improves the effectiveness of post-treatment separation using gravitational sedimentation, magnetic attraction, and membrane filtration. We further demonstrate that CNPs can effectively perform major treatment tasks including adsorption, disinfection, and catalysis. Using model pollutants such as methylene blue, Escherichia coli, and p-nitrophenol, we show that all the surfaces of individual CNTs in CNPs are accessible during water treatment. Our results suggest that the rational design of hierarchical structures represents a feasible approach to develop nanomaterials for engineering applications such as water and wastewater treatment.
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Affiliation(s)
- Haitao Wang
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame , Notre Dame, Indiana 46556, United States
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76
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Chemical and biological treatment of waste water with a novel silver/ordered mesoporous alumina nanocomposite. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2014. [DOI: 10.1007/s13738-014-0470-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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77
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Li W, Wang X, Peng J. Effects of microwave heating on porous structure of regenerated powdered activated carbon used in xylose. ENVIRONMENTAL TECHNOLOGY 2014; 35:532-540. [PMID: 24645431 DOI: 10.1080/09593330.2013.796007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The regeneration of spent powdered activated carbons used in xylose decolourization by microwave heating was investigated. Effects of microwave power and microwave heating time on the adsorption capacity of regenerated activated carbons were evaluated. The optimum conditions obtained are as follows: microwave power 800W; microwave heating time 30min. Regenerated activated carbon in this work has high adsorption capacities for the amount of methylene blue of 16 cm3/0.1 g and the iodine number of 1000.06mg/g. The specific surface areas of fresh commercial activated carbon, spent carbon and regenerated activated carbon were calculated according to the Brunauer, Emmett and Teller method, and the pore-size distributions of these carbons were characterized by non-local density functional theory (NLDFT). The results show that the specific surface area and the total pore volume of regenerated activated carbon are 1064 m2/g and 1.181 mL/g, respectively, indicating the feasibility of regeneration of spent powdered activated carbon used in xylose decolourization by microwave heating. The results of surface fractal dimensions also confirm the results of isotherms and NLDFT.
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78
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Han X, Wishart E, Zheng Y. A comparison of three methods to regenerate activated carbon saturated by diesel fuels. CAN J CHEM ENG 2014. [DOI: 10.1002/cjce.21910] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xue Han
- Department of Chemical Engineering; University of New Brunswick; PO Box 4400 Fredericton NB, Canada, E3B 5A3
| | - Erin Wishart
- Department of Chemical Engineering; University of New Brunswick; PO Box 4400 Fredericton NB, Canada, E3B 5A3
| | - Ying Zheng
- Department of Chemical Engineering; University of New Brunswick; PO Box 4400 Fredericton NB, Canada, E3B 5A3
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79
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Preparation of granular activated carbon from oil palm shell by microwave-induced chemical activation: Optimisation using surface response methodology. Chem Eng Res Des 2013. [DOI: 10.1016/j.cherd.2013.06.004] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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80
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Şahin Ö, Saka C, Kutluay S. Cold plasma and microwave radiation applications on almond shell surface and its effects on the adsorption of Eriochrome Black T. J IND ENG CHEM 2013. [DOI: 10.1016/j.jiec.2013.01.032] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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81
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Wei H, Deng S, Huang Q, Nie Y, Wang B, Huang J, Yu G. Regenerable granular carbon nanotubes/alumina hybrid adsorbents for diclofenac sodium and carbamazepine removal from aqueous solution. WATER RESEARCH 2013; 47:4139-47. [PMID: 23579087 DOI: 10.1016/j.watres.2012.11.062] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 11/18/2012] [Accepted: 11/26/2012] [Indexed: 05/17/2023]
Abstract
A novel granular carbon nanotubes (CNTs)/alumina (Al2O3) hybrid adsorbent with good sorption and regeneration properties was successfully prepared by mixing CNTs with surfactant Brij 35 and pseudo boehmite, followed by calcining to remove surfactant and form porous granules. Alumina binder increased the mechanical strength, hydrophilicity and porosity of the granular adsorbent, while the dispersed CNTs in the granular adsorbent were responsible for the sorption of diclofenac sodium (DS) and carbamazepine (CBZ). Scanning electron microscopy (SEM) showed that the CNTs and Al2O3 were mixed well and the porous structure was formed in the granular adsorbent. The high surface area and appropriate pore size of granular CNTs/Al2O3 adsorbent were favorable for sorption. The sorption of DS decreased with increasing solution pH, while pH had little effect on CBZ sorption. The maximum sorption capacities of CBZ and DS on the CNTs/Al2O3 adsorbent were 157.4 and 106.5 μmol/g according to the Langmuir fitting. Moreover, the spent CNTs/Al2O3 adsorbent can be thermally regenerated at 400 °C in air due to the thermal stability of CNTs. The removal of CBZ and DS changed a little in the initial reuse cycles and then kept relatively constant until tenth cycles. The adsorbed CBZ and DS were decomposed in the regeneration process. This regenerable adsorbent may find potential application in water or wastewater treatment for the removal of some micropollutants such as pharmaceuticals.
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Affiliation(s)
- Haoran Wei
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University - Veolia Environment Joint Research Center for Advanced Technology, School of Environment, POPs Research Center, Tsinghua University, Beijing 100084, PR China
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82
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Foo KY, Lee LK, Hameed BH. Preparation of activated carbon from sugarcane bagasse by microwave assisted activation for the remediation of semi-aerobic landfill leachate. BIORESOURCE TECHNOLOGY 2013; 134:166-172. [PMID: 23500574 DOI: 10.1016/j.biortech.2013.01.139] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Revised: 01/23/2013] [Accepted: 01/24/2013] [Indexed: 06/01/2023]
Abstract
This study evaluates the sugarcane bagasse derived activated carbon (SBAC) prepared by microwave heating for the adsorptive removal of ammonical nitrogen and orthophosphate from the semi-aerobic landfill leachate. The physical and chemical properties of SBAC were examined by pore structural analysis, scanning electron microscopy, Fourier transform infrared spectroscopy and elemental analysis. The effects of adsorbent dosage, contact time and solution pH on the adsorption performance were investigated in a batch mode study at 30°C. Equilibrium data were favorably described by the Langmuir isotherm model, with a maximum monolayer adsorption capacity for ammonical nitrogen and orthophosphate of 138.46 and 12.81 mg/g, respectively, while the adsorption kinetic was best fitted to the pseudo-second-order kinetic model. The results illustrated the potential of sugarcane bagasse derived activated carbon for the adsorptive treatment of semi-aerobic landfill leachate.
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Affiliation(s)
- K Y Foo
- Environment and Occupational Health Programme, School of Health Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
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83
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Foo KY, Lee LK, Hameed BH. Preparation of tamarind fruit seed activated carbon by microwave heating for the adsorptive treatment of landfill leachate: A laboratory column evaluation. BIORESOURCE TECHNOLOGY 2013; 133:599-605. [PMID: 23501142 DOI: 10.1016/j.biortech.2013.01.097] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 01/15/2013] [Accepted: 01/20/2013] [Indexed: 06/01/2023]
Abstract
The preparation of tamarind fruit seed granular activated carbon (TSAC) by microwave induced chemical activation for the adsorptive treatment of semi-aerobic landfill leachate has been attempted. The chemical and physical properties of TSAC were examined. A series of column tests were performed to determine the breakthrough characteristics, by varying the operational parameters, hydraulic loading rate (5-20 mL/min) and adsorbent bed height (15-21 cm). Ammonical nitrogen and chemical oxygen demand (COD), which provide a prerequisite insight into the prediction of leachate quality was quantified. Results illustrated an encouraging performance for the adsorptive removal of ammonical nitrogen and COD, with the highest bed capacity of 84.69 and 55.09 mg/g respectively, at the hydraulic loading rate of 5 mL/min and adsorbent bed height of 21 cm. The dynamic adsorption behavior was satisfactory described by the Thomas and Yoon-Nelson models. The findings demonstrated the applicability of TSAC for the adsorptive treatment of landfill leachate.
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Affiliation(s)
- K Y Foo
- Environment and Occupational Health Programme, School of Health Sciences, Health Campus, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia.
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84
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Foo KY, Hameed BH. Utilization of oil palm biodiesel solid residue as renewable sources for preparation of granular activated carbon by microwave induced KOH activation. BIORESOURCE TECHNOLOGY 2013; 130:696-702. [PMID: 23334029 DOI: 10.1016/j.biortech.2012.11.146] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 11/09/2012] [Accepted: 11/30/2012] [Indexed: 06/01/2023]
Abstract
In this work, preparation of granular activated carbon from oil palm biodiesel solid residue, oil palm shell (PSAC) by microwave assisted KOH activation has been attempted. The physical and chemical properties of PSAC were characterized using scanning electron microscopy, volumetric adsorption analyzer and elemental analysis. The adsorption behavior was examined by performing batch adsorption experiments using methylene blue as dye model compound. Equilibrium data were simulated using the Langmuir, Freundlich and Temkin isotherm models. Kinetic modeling was fitted to the pseudo-first-order, pseudo-second-order and Elovich kinetic models, while the adsorption mechanism was determined using the intraparticle diffusion and Boyd equations. The result was satisfactory fitted to the Langmuir isotherm model with a monolayer adsorption capacity of 343.94mg/g at 30°C. The findings support the potential of oil palm shell for preparation of high surface area activated carbon by microwave assisted KOH activation.
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Affiliation(s)
- K Y Foo
- School of Chemical Engineering, Engineering Campus, Universit Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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85
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Hu E, Cheng H. Impact of surface chemistry on microwave-induced degradation of atrazine in mineral micropores. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:533-541. [PMID: 23215162 DOI: 10.1021/es303486j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Surface chemistry determines the interactions of sorbate and solvent molecules with the pore wall surfaces of microporous minerals, and affects the transmission and absorption of microwave radiation for a given solvent-sorbate-sorbent system. The sorption and microwave-induced degradation of atrazine in the micropores of nine Y zeolites with different densities (0.16-2.62 site/nm(2)) and types (Mg(2+), Ca(2+), H(+), Na(+), and NH(4)(+)) of surface cations were studied. The influence of the content of cosorbed water in the mineral micropores on atrazine degradation rate was also examined. The results indicate the presence of surface cations at around 0.23 site/nm(2) on the pore wall surface was optimal for atrazine degradation, probably due to formation of insufficient number of "hot spots" with too few cations but excessive competition for microwave energy with too many hydrated cations. Atrazine degraded faster in the presence of cations with lower hydration free energies, which could be attributed to less microwave energy consumption to desorb the bounded water molecules. Reducing the content of coadsorbed water in the micropores also increased atrazine degration rate because of less competition for microwave energy from water. Such mechanistic understanding can guide the design and selection of microporous minerals in the practical application of microwave-induced degradation.
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Affiliation(s)
- Erdan Hu
- State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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86
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Yacob AR. Microwave Induced Carbon from Waste Palm Kernel Shell Activated by Phosphoric Acid. ACTA ACUST UNITED AC 2013. [DOI: 10.7763/ijet.2013.v5.545] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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87
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Ahmed SA, Soliman EM. Novel route for silylation of silica gel and aliphatic amines immobilization based on microwave-assisted solvent free synthesis and their applications for Cu(II) and Fe(III) removal from natural water samples. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2013; 48:817-828. [PMID: 23445425 DOI: 10.1080/10934529.2013.744660] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This article describes a new route for silica gel silylation and immobilization of aliphatic amines based on microwave-assisted solvent free synthesis to produce new solid phase extractors. The mode of synthesis was optimized under microwave conditions and achieved in a short time without using solvents. The produced phases named: silica gel- monoamine (SG-MA), silica gel- ethylenediamine (SG-EDA) and silica gel- diethylenetriamine (SG-DETA). The selectivity of these phases towards the uptake of Cu(II) and Fe(III) was checked using batch equilibration technique. Microwave radiation power and time of radiation were optimized to obtain the highest metal uptake values. The novel synthesized silica amine phases were characterized using Fourier transform infrared spectra and scanning electron microscope. The effects of different parameters including, hydrogen ion concentration, initial metal ion concentration, mass of the phase and shaking time on binding capacities of both Cu(II) and Fe(III) were explored. Results of sorption isotherms of the phases were better fitted with the Langmuir model (r² ≥ 0.950). In addition, the kinetics data were best fitted with the pseudo-second-order type (r² = 0.999). Application of SG-MA for removal of Cu(II)- and Fe(III)-spiked natural water samples was achieved satisfactorily using batch experiments. The results were found to refer to superior recovery percentages (90.0-97.01 ± 0.010-0.521%) with no significant matrix interferences.
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Affiliation(s)
- Salwa A Ahmed
- Chemistry Department, Faculty of Science, El-Minia University, Egypt. salwa
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88
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Foo KY, Hameed BH. Microwave-assisted regeneration of activated carbon. BIORESOURCE TECHNOLOGY 2012; 119:234-240. [PMID: 22728787 DOI: 10.1016/j.biortech.2012.05.061] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Revised: 05/11/2012] [Accepted: 05/11/2012] [Indexed: 06/01/2023]
Abstract
Microwave heating was used in the regeneration of methylene blue-loaded activated carbons produced from fibers (PFAC), empty fruit bunches (EFBAC) and shell (PSAC) of oil palm. The dye-loaded carbons were treated in a modified conventional microwave oven operated at 2450 MHz and irradiation time of 2, 3 and 5 min. The virgin properties of the origin and regenerated activated carbons were characterized by pore structural analysis and nitrogen adsorption isotherm. The surface chemistry was examined by zeta potential measurement and determination of surface acidity/basicity, while the adsorptive property was quantified using methylene blue (MB). Microwave irradiation preserved the pore structure, original active sites and adsorption capacity of the regenerated activated carbons. The carbon yield and the monolayer adsorption capacities for MB were maintained at 68.35-82.84% and 154.65-195.22 mg/g, even after five adsorption-regeneration cycles. The findings revealed the potential of microwave heating for regeneration of spent activated carbons.
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Affiliation(s)
- K Y Foo
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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89
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Calışkan E, Bermúdez JM, Parra JB, Menéndez JA, Mahramanlıoğlu M, Ania CO. Low temperature regeneration of activated carbons using microwaves: revising conventional wisdom. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2012; 102:134-140. [PMID: 22446139 DOI: 10.1016/j.jenvman.2012.02.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 01/26/2012] [Accepted: 02/03/2012] [Indexed: 05/31/2023]
Abstract
The purpose of this work was to explore the application of microwaves for the low temperature regeneration of activated carbons saturated with a pharmaceutical compound (promethazine). Contrary to expectations, microwave-assisted regeneration did not lead to better results than those obtained under conventional electric heating. At low temperatures the regeneration was incomplete either under microwave and conventional heating, being this attributed to the insufficient input energy. At mild temperatures, a fall in the adsorption capacity upon cycling was obtained in both devices, although this was much more pronounced for the microwave. These results contrast with previous studies on the benefits of microwaves for the regeneration of carbon materials. The fall in the adsorption capacity after regeneration was due to the thermal cracking of the adsorbed molecules inside the carbon porous network, although this effect applies to both devices. When microwaves are used, along with the thermal heating of the carbon bed, a fraction of the microwave energy seemed to be directly used in the decomposition of promethazine through the excitation of the molecular bonds by microwaves (microwave-lysis). These results point out that the nature of the adsorbate and its ability to interact with microwave are key factors that control the application of microwaves for regeneration of exhausted activated carbons.
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Affiliation(s)
- E Calışkan
- Marmara University, Department of Basic Pharmaceutical Sciences, 34668 Haydarpasa, Istanbul, Turkey
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90
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Foo KY, Hameed BH. Preparation of activated carbon by microwave heating of langsat (Lansium domesticum) empty fruit bunch waste. BIORESOURCE TECHNOLOGY 2012; 116:522-525. [PMID: 22595094 DOI: 10.1016/j.biortech.2012.03.123] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 03/09/2012] [Accepted: 03/30/2012] [Indexed: 05/31/2023]
Abstract
The feasibility of langsat empty fruit bunch waste for preparation of activated carbon (EFBLAC) by microwave-induced activation was explored. Activation with NaOH at the IR ratio of 1.25, microwave power of 600 W for 6 min produced EFBLAC with a carbon yield of 81.31% and adsorption uptake for MB of 302.48 mg/g. Pore structural analysis, scanning electron microscopy and Fourier transform infrared spectroscopy demonstrated the physical and chemical characteristics of EFBLAC. Equilibrium data were best described by the Langmuir isotherm, with a monolayer adsorption capacity of 402.06 mg/g, and the adsorption kinetics was well fitted to the pseudo-second-order equation. The findings revealed the potential to prepare high quality activated carbon from langsat empty fruit bunch waste by microwave irradiation.
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Affiliation(s)
- K Y Foo
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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91
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Ma SC, Gao L, Ma JX, Jin X, Yao JJ, Zhao Y. Advances on simultaneous desulfurization and denitrification using activated carbon irradiated by microwaves. ENVIRONMENTAL TECHNOLOGY 2012; 33:1225-30. [PMID: 22856293 DOI: 10.1080/09593330.2011.618934] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
This paper describes the research background and chemistry of desulfurization and denitrification technology using microwave irradiation. Microwave-induced catalysis combined with activated carbon adsorption and reduction can reduce nitric oxide to nitrogen and sulfur dioxide to sulfur from flue gas effectively. This paper also highlights the main drawbacks of this technology and discusses future development trends. It is reported that the removal of sulfur dioxide and nitric oxide using microwave irradiation has broad prospects for development in the field of air pollution control.
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Affiliation(s)
- Shuang-Chen Ma
- School of Environment, North China Electric Power University, Baoding, China.
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92
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Foo KY, Hameed BH. Potential of jackfruit peel as precursor for activated carbon prepared by microwave induced NaOH activation. BIORESOURCE TECHNOLOGY 2012; 112:143-150. [PMID: 22414577 DOI: 10.1016/j.biortech.2012.01.178] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Revised: 01/27/2012] [Accepted: 01/31/2012] [Indexed: 05/31/2023]
Abstract
The feasibility of preparing activated carbon (JPAC) from jackfruit peel, an industrial residue abundantly available from food manufacturing plants via microwave-assisted NaOH activation was explored. The influences of chemical impregnation ratio, microwave power and radiation time on the properties of activated carbon were investigated. JPAC was examined by pore structural analysis, scanning electron microscopy, Fourier transform infrared spectroscopy, nitrogen adsorption isotherm, elemental analysis, surface acidity/basicity and zeta potential measurements. The adsorptive behavior of JPAC was quantified using methylene blue as model dye compound. The best conditions resulted in JPAC with a monolayer adsorption capacity of 400.06 mg/g and carbon yield of 80.82%. The adsorption data was best fitted to the pseudo-second-order equation, while the adsorption mechanism was well described by the intraparticle diffusion model. The findings revealed the versatility of jackfruit peels as good precursor for preparation of high quality activated carbon.
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Affiliation(s)
- K Y Foo
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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93
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Foo KY, Hameed BH. Mesoporous activated carbon from wood sawdust by K2CO3 activation using microwave heating. BIORESOURCE TECHNOLOGY 2012; 111:425-432. [PMID: 22386466 DOI: 10.1016/j.biortech.2012.01.141] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Revised: 01/21/2012] [Accepted: 01/24/2012] [Indexed: 05/31/2023]
Abstract
Wood sawdust was converted into a high-quality activated carbon (WSAC) via microwave-induced K(2)CO(3) activation. The operational variables including chemical impregnation ratio, microwave power and irradiation time on the carbon yield and adsorption capability were identified. The surface physical characteristics of WSAC were examined by pore structural analysis, scanning electron microscopy and nitrogen adsorption isotherms. The adsorptive behavior of WSAC was quantified using methylene blue as model dye compound. The best conditions resulted in activated carbon with a monolayer adsorption capacity of 423.17 mg/g and carbon yield of 80.75%. The BET surface area, Langmuir surface area and total pore volume were corresponded to 1496.05 m(2)/g, 2245.53 m(2)/g and 0.864 cm(3)/g, respectively. The findings support the potential to prepare high surface area and mesoporous activated carbon from wood sawdust by microwave assisted chemical activation.
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Affiliation(s)
- K Y Foo
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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94
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Hu E, Cheng H, Hu Y. Microwave-induced degradation of atrazine sorbed in mineral micropores. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:5067-5076. [PMID: 22489838 DOI: 10.1021/es204519d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The herbicide atrazine is a common pollutant in reservoirs and other sources of drinking water worldwide. The adsorption of atrazine from water onto zeolites CBV-720 and 4A, mesoporous silica MCM-41, quartz sand, and diatomite, and its microwave-induced degradation when sorbed on these minerals, were studied. Dealuminated HY zeolite CBV-720 exhibited the highest atrazine sorption capacity among the mineral sorbents because of its high micropore volume, suitable pore sizes, and surface hydrophobicity. Atrazine sorbed on the minerals degraded under microwave irradiation due to interfacial selective heating by the microwave, while atrazine in aqueous solution and associated with PTFE powder was not affected. Atrazine degraded rapidly in the micropores of CBV-720 under microwave irradiation and its degradation intermediates also decomposed with further irradiation, suggesting atrazine could be fully mineralized. Two new degradation intermediates of atrazine, 3,5-diamino-1,2,4-triazole and guanidine, were first identified in this study. The evolution of degradation intermediates and changes in infrared spectra of CBV-720 after microwave irradiation consistently indicate the creation of microscale hot spots in the micropores and the degradation of atrazine following a pyrolysis mechanism. These results indicate that microporous mineral sorption coupled with microwave-induced degradation could serve as an efficient treatment technology for removing atrazine from drinking water.
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Affiliation(s)
- Erdan Hu
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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95
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Foo KY, Hameed BH. Microwave-assisted preparation and adsorption performance of activated carbon from biodiesel industry solid reside: influence of operational parameters. BIORESOURCE TECHNOLOGY 2012; 103:398-404. [PMID: 22050840 DOI: 10.1016/j.biortech.2011.09.116] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2011] [Revised: 09/25/2011] [Accepted: 09/26/2011] [Indexed: 05/18/2023]
Abstract
Preparation of activated carbon has been attempted using KOH as activating agent by microwave heating from biodiesel industry solid residue, oil palm empty fruit bunch (EFBAC). The significance of chemical impregnation ratio (IR), microwave power and activation time on the properties of activated carbon were investigated. The optimum condition has been identified at the IR of 1.0, microwave power of 600 W and activation time of 7 min. EFBAC was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and nitrogen adsorption isotherm. The surface chemistry was examined by zeta potential measurement, determination of surface acidity/basicity, while the adsorptive property was quantified using methylene blue as dye model compound. The optimum conditions resulted in activated carbon with a monolayer adsorption capacity of 395.30 mg/g and carbon yield of 73.78%, while the BET surface area and total pore volume were corresponding to 1372 m2/g and 0.76 cm3/g, respectively.
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Affiliation(s)
- K Y Foo
- School of Chemical Engineering, Engineering Campus, Universit Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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96
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Foo KY, Hameed BH. Preparation, characterization and evaluation of adsorptive properties of orange peel based activated carbon via microwave induced K2CO3 activation. BIORESOURCE TECHNOLOGY 2012; 104:679-686. [PMID: 22101073 DOI: 10.1016/j.biortech.2011.10.005] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 09/30/2011] [Accepted: 10/01/2011] [Indexed: 05/31/2023]
Abstract
This work explores the feasibility of orange peel, a citrus processing biomass as an alternative precursor for preparation of activated carbon (OPAC) via microwave assisted K(2)CO(3) activation. The operational parameters, chemical impregnation ratio, microwave power and irradiation time on the carbon yield and adsorption capability were investigated. The virgin characteristics of OPAC were examined by pore structural analysis, scanning electron microscopy, Fourier transform infrared spectroscopy, nitrogen adsorption isotherm, elemental analysis, surface acidity/basicity and zeta potential measurement. The optimum conditions resulted in OPAC with a monolayer adsorption capacity of 382.75 mg/g for methylene blue and carbon yield of 80.99%. The BET surface area, Langmuir surface area and total pore volume were identified to be 1104.45 m(2)/g, 1661.04 m(2)/g and 0.615 m(3)/g, respectively. Equilibrium data were simulated using the Langmuir, Freundlich, Dubinin-Radushkevich, Redlich-Peterson, and Toth isotherms, and kinetic data were fitted to the pseudo-first-order, pseudo-second-order and Elovich kinetic models.
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Affiliation(s)
- K Y Foo
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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97
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Foo KY, Hameed BH. Utilization of rice husks as a feedstock for preparation of activated carbon by microwave induced KOH and K2CO3 activation. BIORESOURCE TECHNOLOGY 2011; 102:9814-9817. [PMID: 21871796 DOI: 10.1016/j.biortech.2011.07.102] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2011] [Revised: 07/24/2011] [Accepted: 07/25/2011] [Indexed: 05/31/2023]
Abstract
Rice husk (RH), an abundant by-product of rice milling, was used for the preparation of activated carbon (RHAC) via KOH and K(2)CO(3) chemical activation. The activation process was performed at the microwave input power of 600 W for 7 min. RHACs were characterized by low temperature nitrogen adsorption/desorption, scanning electron microscopy and Fourier transform infrared spectroscopy. The adsorption behavior was examined using methylene blue as adsorbate. The K(2)CO(3)-activated sample showed higher yield and better pore structures and adsorption capacity development than the KOH-activated sample, with a BET surface area, total pore volume and monolayer adsorption capacity of 1165 m(2)/g, 0.78 cm(3)/g and 441.52 mg/g, respectively. The results revealed the feasibility of microwave heating for preparation of high surface area activated carbons from rice husks via K(2)CO(3) activation.
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Affiliation(s)
- K Y Foo
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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98
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Foo KY, Hameed BH. Preparation and characterization of activated carbon from sunflower seed oil residue via microwave assisted K2CO3 activation. BIORESOURCE TECHNOLOGY 2011; 102:9794-9. [PMID: 21875789 DOI: 10.1016/j.biortech.2011.08.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Revised: 07/24/2011] [Accepted: 08/02/2011] [Indexed: 05/15/2023]
Abstract
Sunflower seed oil residue, a by-product of sunflower seed oil refining, was utilized as a feedstock for preparation of activated carbon (SSHAC) via microwave induced K(2)CO(3) chemical activation. SSHAC was characterized by Fourier transform infrared spectroscopy, nitrogen adsorption-desorption and elemental analysis. Surface acidity/basicity was examined with acid-base titration, while the adsorptive properties of SSHAC were quantified using methylene blue (MB) and acid blue 15 (AB). The monolayer adsorption capacities of MB and AB were 473.44 and 430.37 mg/g, while the Brunauer-Emmett-Teller surface area, Langmuir surface area and total pore volume were 1411.55 m(2)/g, 2137.72 m(2)/g and 0.836 cm(3)/g, respectively. The findings revealed the potential to prepare high surface area activated carbon from sunflower seed oil residue by microwave irradiation.
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Affiliation(s)
- K Y Foo
- School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
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Soto ML, Moure A, Domínguez H, Parajó JC. Recovery, concentration and purification of phenolic compounds by adsorption: A review. J FOOD ENG 2011. [DOI: 10.1016/j.jfoodeng.2011.02.010] [Citation(s) in RCA: 331] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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100
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Influences of co-existing components in flue gas on simultaneous desulfurization and denitrification using microwave irradiation over activated carbon. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/s1872-5813(11)60030-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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