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Oliveira MR, Cecilia JA, Ballesteros-Plata D, Barroso-Martín I, Núñez P, Infantes-Molina A, Rodríguez-Castellón E. Microwave-Assisted Synthesis of Zeolite A from Metakaolinite for CO 2 Adsorption. Int J Mol Sci 2023; 24:14040. [PMID: 37762341 PMCID: PMC10530832 DOI: 10.3390/ijms241814040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 09/10/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
The global demand for energy and industrial growth has generated an exponential use of fossil fuels in recent years. It is well known that carbon dioxide (CO2) is mainly produced, but not only from fuels, which has a negative impact on the environment, such as the increasing emission of greenhouse gases. Thus, thinking about reducing this problem, this study analyzes microwave irradiation as an alternative to conventional heating to optimize zeolite A synthesis conditions for CO2 capture. Synthesis reaction parameters such as different temperatures (60-150 °C) and different time durations (1-6 h) were evaluated. The CO2 adsorption capacity was evaluated by CO2 adsorption-desorption isotherms at 25 °C and atmospheric pressure. The results showed that the synthesis of zeolite A by microwave irradiation was successfully obtained from natural kaolinite (via metakaolinization), reducing both temperature and time. Adsorption isotherms show that the most promising adsorbent for CO2 capture is a zeolite synthesized at 100 °C for 4 h, which reached an adsorption capacity of 2.2 mmol/g.
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Affiliation(s)
- Marilia R. Oliveira
- Center for Studies in Colloidal Systems (NUESC), Laboratory of Materials Synthesis and Chromatography, Institute of Technology and Research (ITP), Tiradentes University (UNIT), Aracaju 49032-490, SE, Brazil;
| | - Juan A. Cecilia
- Department of Inorganic Chemistry, Crystallography and Mineralogy, Malaga University, 29071 Málaga, Spain; (D.B.-P.); (A.I.-M.)
| | - Daniel Ballesteros-Plata
- Department of Inorganic Chemistry, Crystallography and Mineralogy, Malaga University, 29071 Málaga, Spain; (D.B.-P.); (A.I.-M.)
| | - Isabel Barroso-Martín
- Department of Inorganic Chemistry, Crystallography and Mineralogy, Malaga University, 29071 Málaga, Spain; (D.B.-P.); (A.I.-M.)
| | - Pedro Núñez
- Department of Chemistry, Institute of Materials and Nanotechnology, University of La Laguna, 38200 Tenerife, Spain;
| | - Antonia Infantes-Molina
- Department of Inorganic Chemistry, Crystallography and Mineralogy, Malaga University, 29071 Málaga, Spain; (D.B.-P.); (A.I.-M.)
| | - Enrique Rodríguez-Castellón
- Department of Inorganic Chemistry, Crystallography and Mineralogy, Malaga University, 29071 Málaga, Spain; (D.B.-P.); (A.I.-M.)
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Zhang R, Yan C, Yang X, Hu K, Hao F, Yang S, Deng Q, Duan Z, Liu Y, Wen X. Determination of lead in Gentiana rigescens and evaluation of the effect of lead exposure on the liver protection of the natural medicine. Anal Chim Acta 2023; 1251:340992. [PMID: 36925284 DOI: 10.1016/j.aca.2023.340992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 02/06/2023] [Accepted: 02/16/2023] [Indexed: 02/19/2023]
Abstract
In this work, ultrasound-assisted rapidly synergistic cloud point extraction (UARS-CPE) and inductively coupled plasma optical emission spectrometry (ICP-OES) were combined to determine trace Pb in Gentiana rigescens Franch. ex Hemsl. (G. rigescens) samples. Under the optimal conditions, the enhancement factor (EF), limit of detection (LOD), limit of quantitation (LOQ) and precision were 33, 0.11 μg L-1, 0.37 μg L-1 and 1.3%, respectively. This method was applied to the analysis of G. rigescens samples, and the outcomes were in good agreement with the results determined by inductively coupled plasma mass spectrometry (ICP-MS). A mice model of immune liver injury induced by concanavalin A (ConA) was established, and the liver protection of G. rigescens and gentiopicroside (GPS) on it and the effects of various dosages of Pb exposure on its liver protection were studied. Pb at a dosage of 5 mg kg-1 had little effect on the liver protection of G. rigescens and GPS, while 25, 125 mg kg-1 dosages of Pb could significantly attenuate the liver protection of both. In addition, it aggravated the necrosis of hepatocytes and inflammatory cell infiltration, and these effects were dose-dependent.
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Affiliation(s)
- Rui Zhang
- College of Pharmacy, Dali University, Dali, Yunnan, 671000, China
| | - Caixia Yan
- College of Pharmacy, Dali University, Dali, Yunnan, 671000, China
| | - Xiaofang Yang
- College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Kan Hu
- College of Pharmacy, Dali University, Dali, Yunnan, 671000, China
| | - Fangfang Hao
- College of Pharmacy, Dali University, Dali, Yunnan, 671000, China
| | - Shengchun Yang
- College of Pharmacy, Dali University, Dali, Yunnan, 671000, China
| | - Qingwen Deng
- College of Pharmacy, Dali University, Dali, Yunnan, 671000, China
| | - Zhenjuan Duan
- College of Pharmacy, Dali University, Dali, Yunnan, 671000, China
| | - Yong Liu
- College of Pharmacy, Dali University, Dali, Yunnan, 671000, China.
| | - Xiaodong Wen
- College of Pharmacy, Dali University, Dali, Yunnan, 671000, China.
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Effective and Low-Cost Adsorption Procedure for Removing Chemical Oxygen Demand from Wastewater Using Chemically Activated Carbon Derived from Rice Husk. SEPARATIONS 2023. [DOI: 10.3390/separations10010043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Wastewater treatment by adsorption onto activated carbon is effective because it has a variety of benefits. In this work, activated carbon prepared from rice husk by chemical activation using zinc chloride was utilized to reduce chemical oxygen demand from wastewater. The as-prepared activated carbon was characterized by scanning electron microscope, Fourier transform infrared spectroscopy and nitrogen adsorption/desorption analysis. The optimum conditions for maximum removal were achieved by studying the impact of various factors such as solution pH, sorbent dose, shaking time and temperature in batch mode. The results displayed that the optimum sorption conditions were achieved at pH of 3.0, sorbent dose of 0.1 g L−1, shaking time of 100 min and at room temperature (25 °C). Based on the effect of temperature, the adsorption process is exothermic in nature. The results also implied that the isothermal data might be exceedingly elucidated by the Langmuir model. The maximum removal of chemical oxygen demand by the activated carbon was 45.9 mg g−1. The kinetic studies showed that the adsorption process follows a pseudo-first order model. The findings suggested that activated carbon from rice husk may be used as inexpensive substitutes for commercial activated carbon in the treatment of wastewater for the removal of chemical oxygen demand.
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Gebretatios AG, Kadiri Kanakka Pillantakath AR, Witoon T, Lim JW, Banat F, Cheng CK. Rice husk waste into various template-engineered mesoporous silica materials for different applications: A comprehensive review on recent developments. CHEMOSPHERE 2023; 310:136843. [PMID: 36243081 DOI: 10.1016/j.chemosphere.2022.136843] [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: 08/23/2022] [Revised: 09/30/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
Following the discovery of Stöber silica, the realm of morphology-controlled mesoporous silica nanomaterials like MCM-41, SBA-15, and KCC-1 has been expanded. Due to their high BET surface area, tunable pores, easiness of functionalization, and excellent thermal and chemical stability, these materials take part a vital role in the advancement of techniques and technologies for tackling the world's largest challenges in the area of water and the environment, energy storage, and biotechnology. Synthesizing these materials with excellent physicochemical properties from cost-efficient biomass wastes is a foremost model of sustainability. Particularly, SiO2 with a purity >98% can be obtained from rice husk (RH), one of the most abundant biomass wastes, and can be template engineered into various forms of mesoporous silica materials in an economic and eco-friendly way. Hence, this review initially gives insight into why to valorize RH into value-added silica materials. Then the thermal, chemical, hydrothermal, and biological methods of high-quality silica extraction from RH and the principles of synthesis of mesoporous and fibrous mesoporous silica materials like SBA-15, MCM-41, MSNs, and KCC-1 are comprehensively discussed. The potential applications of rice husk-derived mesoporous silica materials in catalysis, drug delivery, energy, adsorption, and environmental remediation are explored. Finally, the conclusion and the future outlook are briefly highlighted.
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Affiliation(s)
- Amanuel Gidey Gebretatios
- Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Abdul Rasheed Kadiri Kanakka Pillantakath
- Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates; Center for Catalysis and Separation (CeCaS), Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Thongthai Witoon
- Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, 50 Ngamwongwan Rd., Ladyao, Jatujak Bangkok, 10900, Thailand
| | - Jun-Wei Lim
- Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
| | - Fawzi Banat
- Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Chin Kui Cheng
- Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates; Center for Catalysis and Separation (CeCaS), Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates.
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Fabrication and characterization of MgCo2O4 for Solid Phase Extraction of Pb(II) from Environmental Samples and Its detection with high-resolution continuum source flame atomic absorption spectrometry (HR-CS-FAAS). Microchem J 2022. [DOI: 10.1016/j.microc.2022.107329] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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