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Gollakota AR, Munagapati VS, Liao SW, Shu CM, Shadangi KP, Sarangi PK, Wen JC. Ionic liquid [bmim] [TFSI] templated Na-X zeolite for the adsorption of (Cd 2+, Zn 2+), and dyes (AR, R6). ENVIRONMENTAL RESEARCH 2023; 216:114525. [PMID: 36243055 DOI: 10.1016/j.envres.2022.114525] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/29/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
1-butyl-3-methylimidazolium bis(triflouromethylsufonyl)imide functionalization to Na-X zeolite (IFZ) is the primary goal of this study in order to evaluate its ability to remove heavy metals (Cd2+), (Zn2+), dyes Rhodamine 6G (R6), and Alizarin Red S (AR) from aqueous streams. IFZ was thoroughly examined using analytical techniques XRD, BET, FE-SEM, and FTIR, to better understand its physical and chemical properties. The surface area and the volume of pores (IFZ; 19.93 m2/g, 0.0544 cm3/g) were reduced in comparison to the parent zeolite (Na-X; 63.92 m2/g, 0.0884 cm3/g). According to SEM, the crystal structure of the zeolite (Na-X) has not been significantly altered by XRD analysis. The mechanism, kinetics, isotherms, and thermodynamic properties of adsorption were all studied using batch adsorption experiments under various operating conditions. IFZ adsorbs dyes (AR; 76.33 mg/g, R6; 65.85 mg/g) better than metal ions (Cd2+; 30.68 mg/g, Zn2+; 41.53 mg/g) in acidic conditions. The Langmuir isotherm and pseudo-second order models were found to be the most accurate models for equilibrium data. Adsorption is endothermic and spontaneous, as revealed by the thermodynamics of the process. The IFZ can be used in three (Cd2+), two (Zn2+), four (AR), and five (R6) cycles of desorption and regeneration. For these reasons, IL-modified zeolite can be used to remove multiple types of pollutants from water in one simple step.
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Affiliation(s)
- Anjani Rk Gollakota
- Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Douliou City, Yunlin, 64002, Taiwan
| | - Venkata Subbaiah Munagapati
- Research Centre for Soil & Water Resources and Natural Disaster Prevention (SWAN), National Yunlin University of Science & Technology, Douliou, 64002, Taiwan, ROC
| | - Sheng-Wei Liao
- Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Douliou City, Yunlin, 64002, Taiwan
| | - Chi-Min Shu
- Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Douliou City, Yunlin, 64002, Taiwan.
| | - Krushna Prasad Shadangi
- College of Agriculture, Central Agricultural University, Imphal, Manipur, 795004, India; Department of Chemical Engineering, VSS University of Technology, Burla Sambalpur 768 018, Odisha, India
| | - Prakash K Sarangi
- College of Agriculture, Central Agricultural University, Imphal, Manipur, 795004, India.
| | - Jet-Chau Wen
- Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, Douliou City, Yunlin, 64002, Taiwan; Research Centre for Soil & Water Resources and Natural Disaster Prevention (SWAN), National Yunlin University of Science & Technology, Douliou, 64002, Taiwan, ROC
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Nagarkar RA, Nagabhushana KS, Chaudhari P, Mal NK, Dapurkar SE. Efficient Process for the Production of Alkyl Esters. ACS OMEGA 2022; 7:28129-28137. [PMID: 35990439 PMCID: PMC9386816 DOI: 10.1021/acsomega.2c02247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
This article reports a scalable process development for the production of alkyl esters through the esterification route by utilizing fly ash as a catalyst. The catalyst consisting of mixed oxides such as alumina, iron oxide, calcium oxide, magnesium oxide, and silica was employed for the esterification reaction without modification. The catalyst was evaluated for the conversion of feedstock containing variable amounts of free fatty acids, mono/dibasic acid, and alcohol/polyols into the corresponding alkyl esters. Three types of fly ash catalysts, viz., FS-1, FP-1, and FC-1, were chosen from three different industrial sources. Synthesis of dimethyl adipate was studied as a model reaction. FS-1 fly ash gave the highest yield of dimethyl adipate, whereas FC-1 gave a low yield of dimethyl adipate. The recyclability of FS-1 was evaluated for three cycles, and no loss of yield was observed. Furthermore, the catalyst FS-I was found to be capable of producing good yields for various esterification reactions with different substrates.
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Affiliation(s)
- Rahul A. Nagarkar
- Tata
Chemicals Limited, Innovation Centre, Pune 412108, India
- Manipal
Academy of Higher Education, Manipal 576104, India
| | | | | | | | - Sudhir E. Dapurkar
- Tata
Chemicals Limited, Innovation Centre, Pune 412108, India
- Manipal
Academy of Higher Education, Manipal 576104, India
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Li X, Yi L, Zhu Q, Zhao L, Xu Y, Liu M, Liu T, Wu Q. Synthesis of coal fly ash supported MnO 2 for the enhanced degradation of Acid Red 73 in the presence of peroxymonosulfate. ENVIRONMENTAL TECHNOLOGY 2021; 42:81-92. [PMID: 31116650 DOI: 10.1080/09593330.2019.1620868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/11/2019] [Indexed: 06/09/2023]
Abstract
In this study, coal fly ash supported MnO2 (CFA@MnO2) was synthesized as heterocatalyst for the activation of peroxymonosulfate to degrade Acid Red 73 (AR73). The synthesized catalyst was characterized by X-Ray Fluorescence Spectrometer (XRF), X-ray powder diffraction (XRD), Scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET). The composite of CFA@MnO2 possesses a large surface area of 74.59 m2/g. In the catalytic experiment, CFA@MnO2 exhibits excellent catalytic performance with 99.13% AR73 removed within 40 min with a high kinetic rate constant of 0.124 min-1, 5.49 times higher than that of pure MnO2. The operating parameters of CFA@MnO2-based fenton catalytic system were discussed, including MnO2 loading, solution pH, PMS dosage and temperature. The catalyst maintained a relatively high removal rate (>85%) over 5 cycles and degradation intermediates are detected on the catalyst surface after cycled via XPS analysis. The degradation mechanism was investigated by quenching experiments and Electron Paramagnetic Resonance technology. The surface-bound ·OH and SO4 ·- are considered as the main active radicals in the degradation process. The composite of CFA@MnO2 provides a low-cost and efficient alternative for the catalytic oxidation of organic pollutants.
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Affiliation(s)
- Xiaoman Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha, People's Republic of China
| | - Longsheng Yi
- School of Minerals Processing and Bioengineering, Central South University, Changsha, People's Republic of China
| | - Qinglin Zhu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, People's Republic of China
| | - Lihua Zhao
- School of Minerals Processing and Bioengineering, Central South University, Changsha, People's Republic of China
| | - Yuanhong Xu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, People's Republic of China
| | - Miao Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, People's Republic of China
| | - Tao Liu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, People's Republic of China
| | - Qian Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, People's Republic of China
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Kumari M, Saroha AK. Performance of various catalysts on treatment of refractory pollutants in industrial wastewater by catalytic wet air oxidation: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 228:169-188. [PMID: 30218904 DOI: 10.1016/j.jenvman.2018.09.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/29/2018] [Accepted: 09/01/2018] [Indexed: 06/19/2023]
Abstract
The tremendous increase of industrialization and urbanization worldwide causes the depletion of natural resources such as water and air which urges the necessity to follow the environmental sustainability across the globe. This requires eco-friendly and economical technologies for depollution of wastewater and gases or zero emission approach. Therefore, in this context the treatment and reuse of wastewater is an environmental friendly approach due to shortage of fresh water. Catalytic wet air oxidation (CWAO) is a promising technology for the treatment of toxic and non-biodegradable organic pollutants in the wastewater generated from various industries. Various heterogeneous catalysts have been extensively used for treatment of various model pollutants such as phenols, carboxylic acids, nitrogenous compounds and different types of industrial effluents. The present review focuses on the literature published on the performances of various noble and non-noble metal catalysts for the treatment of various pollutants by CWAO. Reports on biodegradability enhancement of industrial wastewater containing toxic contaminants by CWAO are reviewed. Detailed discussion is made on catalyst deactivation and their mitigation study and also on the various factors which affects the CWAO reaction.
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Affiliation(s)
- Manjari Kumari
- Department of Chemical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | - Anil K Saroha
- Department of Chemical Engineering, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
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Li S, Xu Y, Wang X, Guo Y, Mu Q. Catalytic degradation of 4-chlorophenol with La/TiO2 in a dielectric barrier discharge system. RSC Adv 2016. [DOI: 10.1039/c6ra02807a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This is the image of the possible degradation pathway of 4-chlorophenol and structures of the intermediates.
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Affiliation(s)
- Shanping Li
- School of Environmental Science and Engineering
- Shandong University
- Jinan
- China
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse
| | - Yanjia Xu
- School of Environmental Science and Engineering
- Shandong University
- Jinan
- China
| | - Xiaoping Wang
- School of Environmental Science and Engineering
- Shandong University
- Jinan
- China
| | - Yongbo Guo
- School of Environmental Science and Engineering
- Shandong University
- Jinan
- China
| | - Qinglin Mu
- School of Environmental Science and Engineering
- Shandong University
- Jinan
- China
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