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Roh H, Kim DH, Cho Y, Jo YM, Del Alamo JA, Kulik HJ, Dincă M, Gumyusenge A. Robust Chemiresistive Behavior in Conductive Polymer/MOF Composites. Adv Mater 2024:e2312382. [PMID: 38632844 DOI: 10.1002/adma.202312382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 02/20/2024] [Indexed: 04/19/2024]
Abstract
Metal-organic frameworks (MOFs) are promising materials for gas sensing but are often limited to single-use detection. A hybridization strategy is demonstrated synergistically deploying conductive MOFs (cMOFs) and conductive polymers (cPs) as two complementary mixed ionic-electronic conductors in high-performing stand-alone chemiresistors. This work presents significant improvement in i) sensor recovery kinetics, ii) cycling stability, and iii) dynamic range at room temperature. The effect of hybridization across well-studied cMOFs is demonstrated based on 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) and 2,3,6,7,10,11-hexaiminotriphenylene (HITP) ligands with varied metal nodes (Co, Cu, Ni). A comprehensive mechanistic study is conducted to relate energy band alignments at the heterojunctions between the MOFs and the polymer with sensing thermodynamics and binding kinetics. The findings reveal that hole enrichment of the cMOF component upon hybridization leads to selective enhancement in desorption kinetics, enabling significantly improved sensor recovery at room temperature, and thus long-term response retention. This mechanism is further supported by density functional theory calculations on sorbate-analyte interactions. It is also found that alloying cPs and cMOFs enables facile thin film co-processing and device integration, potentially unlocking the use of these hybrid conductors in diverse electronic applications.
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Affiliation(s)
- Heejung Roh
- Massachusetts Institute of Technology, Department of Materials Science & Engineering, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
- Massachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
| | - Dong-Ha Kim
- Massachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
| | - Yeongsu Cho
- Massachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
- Massachusetts Institute of Technology, Department of Chemical Engineering, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
| | - Young-Moo Jo
- Massachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
| | - Jesús A Del Alamo
- Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
- MIT-IBM Watson AI Lab, 75 Binney St, Cambridge, MA, 02139, USA
| | - Heather J Kulik
- Massachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
- Massachusetts Institute of Technology, Department of Chemical Engineering, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
| | - Mircea Dincă
- Massachusetts Institute of Technology, Department of Chemistry, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
| | - Aristide Gumyusenge
- Massachusetts Institute of Technology, Department of Materials Science & Engineering, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
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Jo YM, Jo YK, Lee JH, Jang HW, Hwang IS, Yoo DJ. MOF-Based Chemiresistive Gas Sensors: Toward New Functionalities. Adv Mater 2023; 35:e2206842. [PMID: 35947765 DOI: 10.1002/adma.202206842] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Indexed: 06/15/2023]
Abstract
The sensing performances of gas sensors must be improved and diversified to enhance quality of life by ensuring health, safety, and convenience. Metal-organic frameworks (MOFs), which exhibit an extremely high surface area, abundant porosity, and unique surface chemistry, provide a promising framework for facilitating gas-sensor innovations. Enhanced understanding of conduction mechanisms of MOFs has facilitated their use as gas-sensing materials, and various types of MOFs have been developed by examining the compositional and morphological dependences and implementing catalyst incorporation and light activation. Owing to their inherent separation and absorption properties and catalytic activity, MOFs are applied as molecular sieves, absorptive filtering layers, and heterogeneous catalysts. In addition, oxide- or carbon-based sensing materials with complex structures or catalytic composites can be derived by the appropriate post-treatment of MOFs. This review discusses the effective techniques to design optimal MOFs, in terms of computational screening and synthesis methods. Moreover, the mechanisms through which the distinctive functionalities of MOFs as sensing materials, heterostructures, and derivatives can be incorporated in gas-sensor applications are presented.
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Affiliation(s)
- Young-Moo Jo
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
| | - Yong Kun Jo
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jong-Heun Lee
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Ho Won Jang
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - In-Sung Hwang
- Sentech Gmi Co. Ltd, Seoul, 07548, Republic of Korea
| | - Do Joon Yoo
- SentechKorea Co. Ltd, Paju, 10863, Republic of Korea
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Park SJ, Moon YK, Park SW, Lee SM, Kim TH, Kim SY, Lee JH, Jo YM. Highly Sensitive and Selective Real-Time Breath Isoprene Detection using the Gas Reforming Reaction of MOF-Derived Nanoreactors. ACS Appl Mater Interfaces 2023; 15:7102-7111. [PMID: 36700612 DOI: 10.1021/acsami.2c20416] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Real-time breath isoprene sensing provides noninvasive methods for monitoring human metabolism and early diagnosis of cardiovascular diseases. Nonetheless, the stable alkene structure and high humidity of the breath hinder sensitive and selective isoprene detection. In this work, we derived well-defined Co3O4@polyoxometalate yolk-shell structures using a metal-organic framework template. The inner space, including highly catalytic Co3O4 yolks surrounded by a semipermeable polyoxometalate shell, enables stable isoprene to be reformed to reactive intermediate species by increasing the gas residence time and the reaction with the inner catalyst. This sensor exhibited selective isoprene detection with an extremely high chemiresistive response (180.6) and low detection limit (0.58 ppb). The high sensing performance can be attributed to electronic sensitization and catalytic promotion effects. In addition, the reforming reaction of isoprene is further confirmed by the proton transfer reaction-quadrupole mass spectrometry analysis. The practical feasibility of this sensor in smart healthcare applications is exhibited by monitoring muscle activity during the workout.
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Affiliation(s)
- Seon Ju Park
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Young Kook Moon
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Sei-Woong Park
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Soo Min Lee
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Tae-Hyun Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Soo Young Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Jong-Heun Lee
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Young-Moo Jo
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea
- Current address: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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Jo YK, Jeong SY, Moon YK, Jo YM, Yoon JW, Lee JH. Exclusive and ultrasensitive detection of formaldehyde at room temperature using a flexible and monolithic chemiresistive sensor. Nat Commun 2021; 12:4955. [PMID: 34400624 PMCID: PMC8368006 DOI: 10.1038/s41467-021-25290-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 07/29/2021] [Indexed: 02/06/2023] Open
Abstract
Formaldehyde, a probable carcinogen, is a ubiquitous indoor pollutant, but its highly selective detection has been a long-standing challenge. Herein, a chemiresistive sensor that can detect ppb-level formaldehyde in an exclusive manner at room temperature is designed. The TiO2 sensor exhibits under UV illumination highly selective detection of formaldehyde and ethanol with negligible cross-responses to other indoor pollutants. The coating of a mixed matrix membrane (MMM) composed of zeolitic imidazole framework (ZIF-7) nanoparticles and polymers on TiO2 sensing films removed ethanol interference completely by molecular sieving, enabling an ultrahigh selectivity (response ratio > 50) and response (resistance ratio > 1,100) to 5 ppm formaldehyde at room temperature. Furthermore, a monolithic and flexible sensor is fabricated successfully using a TiO2 film sandwiched between a flexible polyethylene terephthalate substrate and MMM overlayer. Our work provides a strategy to achieve exclusive selectivity and high response to formaldehyde, demonstrating the promising potential of flexible gas sensors for indoor air monitoring. Formaldehyde, a probable carcinogen, is a ubiquitous indoor pollutant, but its ultraselective detection has been a long-standing challenge. Here, the authors develop a chemiresistive sensor that can detect ppb-level formaldehyde in an exclusive manner at room temperature.
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Affiliation(s)
- Yong Kun Jo
- Department of Materials Science and Engineering, Korea University, Seoul, Republic of Korea
| | - Seong-Yong Jeong
- Department of Materials Science and Engineering, Korea University, Seoul, Republic of Korea
| | - Young Kook Moon
- Department of Materials Science and Engineering, Korea University, Seoul, Republic of Korea
| | - Young-Moo Jo
- Department of Materials Science and Engineering, Korea University, Seoul, Republic of Korea
| | - Ji-Wook Yoon
- Department of Information Materials Engineering, Jeonbuk National University, Jeonju, Republic of Korea
| | - Jong-Heun Lee
- Department of Materials Science and Engineering, Korea University, Seoul, Republic of Korea.
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Jo YM, Lim K, Yoon JW, Jo YK, Moon YK, Jang HW, Lee JH. Visible-Light-Activated Type II Heterojunction in Cu 3(hexahydroxytriphenylene) 2/Fe 2O 3 Hybrids for Reversible NO 2 Sensing: Critical Role of π-π* Transition. ACS Cent Sci 2021; 7:1176-1182. [PMID: 34345668 PMCID: PMC8323242 DOI: 10.1021/acscentsci.1c00289] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Indexed: 05/05/2023]
Abstract
Metal-organic frameworks (MOFs) with high surface area, tunable porosity, and diverse structures are promising platforms for chemiresistors; however, they often exhibit low sensitivity, poor selectivity, and irreversibility in gas sensing, hindering their practical applications. Herein, we report that hybrids of Cu3(HHTP)2 (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) nanoflakes and Fe2O3 nanoparticles exhibit highly sensitive, selective, and reversible detection of NO2 at 20 °C. The key parameters to determine their response, selectivity, and recovery are discussed in terms of the size of the Cu3(HHTP)2 nanoflakes, the interaction between the MOFs and NO2, and an increase in the concentration and lifetime of holes facilitated by visible-light photoactivation and charge-separating energy band alignment of the hybrids. These photoactivated MOF-oxide hybrids suggest a new strategy for designing high-performance MOF-based gas sensors.
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Affiliation(s)
- Young-Moo Jo
- Department
of Materials Science and Engineering, Korea
University, Seoul 02841, Republic of Korea
| | - Kyeorei Lim
- Department
of Materials Science and Engineering, Korea
University, Seoul 02841, Republic of Korea
| | - Ji Won Yoon
- Department
of Materials Science and Engineering, Korea
University, Seoul 02841, Republic of Korea
| | - Yong Kun Jo
- Department
of Materials Science and Engineering, Korea
University, Seoul 02841, Republic of Korea
| | - Young Kook Moon
- Department
of Materials Science and Engineering, Korea
University, Seoul 02841, Republic of Korea
| | - Ho Won Jang
- Department
of Materials Science and Engineering, Research
Institute of Advanced Materials Seoul National University, Seoul 08826, Republic of Korea
| | - Jong-Heun Lee
- Department
of Materials Science and Engineering, Korea
University, Seoul 02841, Republic of Korea
- E-mail: . Fax: +82-2-928-3584. Phone: +82-2-3290-3282
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Lim K, Jo YM, Yoon JW, Kim JS, Lee DJ, Moon YK, Yoon JW, Kim JH, Choi HJ, Lee JH. A Transparent Nanopatterned Chemiresistor: Visible-Light Plasmonic Sensor for Trace-Level NO 2 Detection at Room Temperature. Small 2021; 17:e2100438. [PMID: 33817966 DOI: 10.1002/smll.202100438] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/17/2021] [Indexed: 06/12/2023]
Abstract
The highly selective detection of trace gases using transparent sensors at room temperature remains challenging. Herein, transparent nanopatterned chemiresistors composed of aligned 1D Au-SnO2 nanofibers, which can detect toxic NO2 gas at room temperature under visible light illumination is reported. Ten straight Au-SnO2 nanofibers are patterned on a glass substrate with transparent electrodes assisted by direct-write, near-field electrospinning, whose extremely low coverage of sensing materials (≈0.3%) lead to the high transparency (≈93%) of the sensor. The sensor exhibits a highly selective, sensitive, and reproducible response to sub-ppm levels of NO2 , and its detection limit is as low as 6 ppb. The unique room-temperature NO2 sensing under visible light emanates from the localized surface plasmonic resonance effect of Au nanoparticles, thereby enabling the design of new transparent oxide-based gas sensors without external heaters or light sources. The patterning of nanofibers with extremely low coverage provides a general strategy to design diverse compositions of gas sensors, which can facilitate the development of a wide range of new applications in transparent electronics and smart windows wirelessly connected to the Internet of Things.
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Affiliation(s)
- Kyeorei Lim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Young-Moo Jo
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Ji-Wook Yoon
- Department of Information Materials Engineering, Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju, 54896, Korea
| | - Jun-Sik Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Dong-Jae Lee
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Young Kook Moon
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Ji Won Yoon
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jae-Hyeok Kim
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Hun Ji Choi
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Jong-Heun Lee
- Department of Materials Science and Engineering, Korea University, Seoul, 02841, Republic of Korea
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Jo YM, Kim TH, Lee CS, Lim K, Na CW, Abdel-Hady F, Wazzan AA, Lee JH. Metal-Organic Framework-Derived Hollow Hierarchical Co 3O 4 Nanocages with Tunable Size and Morphology: Ultrasensitive and Highly Selective Detection of Methylbenzenes. ACS Appl Mater Interfaces 2018; 10:8860-8868. [PMID: 29465974 DOI: 10.1021/acsami.8b00733] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Nearly monodisperse hollow hierarchical Co3O4 nanocages of four different sizes (∼0.3, 1.0, 2.0, and 4.0 μm) consisting of nanosheets were prepared by controlled precipitation of zeolitic imidazolate framework-67 (ZIF-67) rhombic dodecahedra, followed by solvothermal synthesis of Co3O4 nanocages using ZIF-67 self-sacrificial templates, and subsequent heat treatment for the development of high-performance methylbenzene sensors. The sensor based on hollow hierarchical Co3O4 nanocages with the size of ∼1.0 μm exhibited not only ultrahigh responses (resistance ratios) to 5 ppm p-xylene (78.6) and toluene (43.8) but also a remarkably high selectivity to methylbenzene over the interference of ubiquitous ethanol at 225 °C. The unprecedented and high response and selectivity to methylbenzenes are attributed to the highly gas-accessible hollow hierarchical morphology with thin shells, abundant mesopores, and high surface area per unit volume as well as the high catalytic activity of Co3O4. Moreover, the size, shell thickness, mesopores, and hollow/hierarchical morphology of the nanocages, the key parameters determining the gas response and selectivity, could be well-controlled by tuning the precipitation of ZIF-67 rhombic dodecahedra and solvothermal reaction. This method can pave a new pathway for the design of high-performance methylbenzene sensors for monitoring the quality of indoor air.
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Affiliation(s)
- Young-Moo Jo
- Department of Materials Science and Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Tae-Hyung Kim
- Department of Materials Science and Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Chul-Soon Lee
- Department of Materials Science and Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Kyeorei Lim
- Department of Materials Science and Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Chan Woong Na
- Dongnam Regional Division , Korea Institute of Industrial Technology , Busan 46938 , Republic of Korea
| | - Faissal Abdel-Hady
- Department of Chemical and Materials Engineering , King Abdulaziz University , Jeddah 21589 , Saudi Arabia
| | - Abdulaziz A Wazzan
- Department of Chemical and Materials Engineering , King Abdulaziz University , Jeddah 21589 , Saudi Arabia
| | - Jong-Heun Lee
- Department of Materials Science and Engineering , Korea University , Seoul 02841 , Republic of Korea
- Department of Chemical and Materials Engineering , King Abdulaziz University , Jeddah 21589 , Saudi Arabia
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Chung HJ, Kim KW, Han DW, Lee HC, Yang BC, Chung HK, Shim MR, Choi MS, Jo EB, Jo YM, Oh MY, Jo SJ, Hong SK, Park JK, Chang WK. Protein Profile in Corpus Luteum during Pregnancy in Korean Native Cows. Asian-Australas J Anim Sci 2014; 25:1540-5. [PMID: 25049514 PMCID: PMC4093032 DOI: 10.5713/ajas.2012.12294] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Revised: 08/28/2012] [Accepted: 08/12/2012] [Indexed: 01/17/2023]
Abstract
Steroidogenesis requires coordination of the anabolic and catabolic pathways of lipid metabolism, but the profile of proteins associated with progesterone synthesis in cyclic and pregnant corpus luteum (CL) is not well-known in cattle. In Experiment 1, plasma progesterone level was monitored in cyclic cows (n = 5) and pregnant cows (n = 6; until d-90). A significant decline in the plasma progesterone level occurred at d-19 of cyclic cows. Progesterone level in abbatoir-derived luteal tissues was also determined at d 1 to 5, 6 to 13 and 14 to 20 of cyclic cows, and d-60 and -90 of pregnant cows (n = 5 each). Progesterone level in d-60 CL was not different from those in d 6 to 13 CL and d-90 CL, although the difference between d 6 to 13 and d-90 was significant. In Experiment 2, protein expression pattern in CL at d-90 (n = 4) was compared with that in CL of cyclic cows at d 6 to 13 (n = 5). Significant changes in the level of protein expression were detected in 32 protein spots by two-dimensional polyacrylamide gel electrophoresis (2-DE), and 23 of them were identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). Six proteins were found only in pregnant CL, while the other 17 proteins were found only in cyclic CL. Among the above 6 proteins, vimentin which is involved in the regulation of post-implantation development was included. Thus, the protein expression pattern in CL was disorientated from cyclic luteal phase to mid pregnancy, and alterations in specific CL protein expression may contribute to the maintenance of pregnancy in Korean native cows.
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Affiliation(s)
- H J Chung
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - K W Kim
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - D W Han
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - H C Lee
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - B C Yang
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - H K Chung
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - M R Shim
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - M S Choi
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - E B Jo
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - Y M Jo
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - M Y Oh
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - S J Jo
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - S K Hong
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - J K Park
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
| | - W K Chang
- National Institute of Animal Science, Rural Development Administration, Suwon, 441-706, Korea
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Park JH, Jo YM, Oh JM. Classification of lake sediments using a hydrocyclone. Water Sci Technol 2003; 47:277-281. [PMID: 12578206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The present work is a preliminary experiment for hydrocyclones as a primary process in lake sediment thickening. A few cyclones based on the Rietema standard geometry were prepared, and sample particles were sediments from a local lake and waste coal fly ash for a reference test. As a result of the chemical analysis, more organic contaminants were found in smaller particles. The experimental tests showed that physical characteristics of particles, configuration of the cyclone and operation conditions could affect the separation efficiency.
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Affiliation(s)
- J H Park
- School of Environment and Applied Chemistry, Centre for Environmental Studies, Kyunghee University, Kyunggi-do 449-701, Korea
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