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Baigorria E, Cano L, Sapag K, Alvarez V. Removal efficiency of As(III) from aqueous solutions using natural and Fe(III) modified bentonites. ENVIRONMENTAL TECHNOLOGY 2022; 43:3728-3741. [PMID: 34034622 DOI: 10.1080/09593330.2021.1934559] [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: 10/29/2020] [Accepted: 05/13/2021] [Indexed: 06/12/2023]
Abstract
Contamination of water with arsenic is a major global health problem. The use of adsorbent materials for the removal of As from aqueous systems is a plausible solution to this problem. In this work, the use of commercial bentonites (purified and modified with iron (III)) for the removal of As from water was studied. The samples were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier Transformed Infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and nitrogen adsorption/desorption isotherms to determine their physicochemical properties. The arsenic removal capacities of adsorbent materials were studied from 1 mg/L solutions of As (III) using the colorimetric technique of molybdenum blue. High adsorption capacity (0.33 mg/g) of As (III) was obtained in aqueous systems after 1 h of treatment with unmodified bentonite. The incorporation of iron improved the removal performance in short times. The obtained results could be the starting point for the development of a low-cost filtration system that contributes to solve the problem of arsenic in water.
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Affiliation(s)
- Estefanía Baigorria
- Grupo de Materiales Compuestos Termoplásticos (CoMP) - Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET - Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
| | - Leonardo Cano
- Grupo de Materiales Compuestos Termoplásticos (CoMP) - Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET - Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
| | - Karim Sapag
- Laboratorio de Sólidos Porosos (LabSoP), Instituto de Física Aplicada (INFAP), CONICET - Universidad Nacional de San Luis, San Luis, Argentina
| | - Vera Alvarez
- Grupo de Materiales Compuestos Termoplásticos (CoMP) - Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET - Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
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Mechanism of As(V) adsorption from aqueous solution by chitosan-modified diatomite adsorbent. J DISPER SCI TECHNOL 2022. [DOI: 10.1080/01932691.2021.1876592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Ibrahim SM, Saad N, Ahmed MM, Abd El-Aal M. Novel synthesis of antibacterial pyrone derivatives using kinetics and mechanism of oxidation of azithromycin by alkaline permanganate. Bioorg Chem 2021; 119:105553. [PMID: 34920338 DOI: 10.1016/j.bioorg.2021.105553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 12/05/2021] [Accepted: 12/08/2021] [Indexed: 01/25/2023]
Abstract
Dimethylamino-2H-5-dihydropyrane-6-methyl-4-one (DADHP) is a novel antibacterial pyrones derivatives and potential pharmaceutical that was quantitatively synthesized by oxidizing azithromycin (AZ) antibiotic with potassium permanganate in an alkaline medium (pH > 12). The oxidation reaction was kinetically studied using spectrophotometric technique at ionic strength equal to 0.02 mol dm-3. The redox reaction was discovered to have two separate stages that could be measured. The first stage was relatively fast and corresponding to the formation of coordination intermediate complexes involving blue hypomanganate (V) and/or green manganate (VI) transient species. Variable parameters like as the concentration of permanganate ion and AZ substrate, as well as pH and ionic strength, have been studied to see how they affect oxidation rates. The experimental results showed a first-order dependency in [MnO4-] and fractional first-order kinetics in each of [AZ] and alkali concentration under pseudo-first-order reaction conditions of [AZ] ≫ 10 [MnO4-]. The oxidation process was base-catalyzed, and the oxidation rates increased as the alkali concentration increased. The product was confirmed by Fourier Transform Infrared spectroscopy (FTIR), elemental analysis, condensation tests with 2,4-dinitrophenyl haydrazine and hydroxyl amine, and GC-Mass. The oxidation product obtained can be employed as interesting class of organic compounds with diverse chemical and pharmacological applications.
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Affiliation(s)
- Samia M Ibrahim
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga, New Valley 72511, Egypt.
| | - Nora Saad
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga, New Valley 72511, Egypt
| | - Mahmoud M Ahmed
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga, New Valley 72511, Egypt
| | - Mohamed Abd El-Aal
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516 Egypt
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Çetinkaya Z, Kalem V. Production of red mud based nanofibers and their potential in arsenate removal from waste water. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1985512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Zeynep Çetinkaya
- Department of Metallurgical and Materials Engineering, Konya Technical University, Konya, Turkey
| | - Volkan Kalem
- Department of Metallurgical and Materials Engineering, Konya Technical University, Konya, Turkey
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Exploring the Potential in LID Technologies for Remediating Heavy Metals in Carwash Wastewater. SUSTAINABILITY 2021. [DOI: 10.3390/su13168727] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Carwash wastewater (CWW) can be a significant source of environmental pollution due to the diversity and high concentrations of contaminants it contains. This toxic wastewater can contain several different heavy metals that if left untreated, can enter surface and sub-surface waters. Innovative, nature-based solutions such as low-impact development (LID) technologies may provide an eco-friendly CWW treatment process that is both effective and affordable. This research reviews the available literature to provide definitive values of flowrate and contaminant concentrations found in CWW around the globe. Dividing LID technologies into two groups, vegetated and unvegetated systems, the authors explored the literature for the general performance of these technologies to sustainably treat heavy metals in CWW. Depending on the car wash’s size and intended purpose, whether cleaning vehicles in agriculture-based rural communities, mining, or in high-density urban environments, volumetric flowrates requiring treatment found in six different countries ranged from 35–400 L/car. CWW also contains a wide range of contaminants at various levels, including COD, turbidity, TDS and TSS, surfactants, oils and greases, and heavy metals such as lead, cadmium, zinc, copper, chromium, and iron. Heavy metal removal by both vegetated and unvegetated LIDs shows mixed results in the literature, but given the different processes involved in both types, the authors propose a system that combines these types in order to provide all the necessary removal processes, including mechanical filtration, adsorption, sedimentation, chemical and biological treatment processes.
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Tian Z, Lu C, Zhou Y, Zhang Y, Wei W. Phosphoric acid-induced activation of sepiolite for enhanced As(III) adsorption: role of in situ deposition of nano-hydroxyapatite. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1948424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Zhuangzhuang Tian
- School of Electronics and Information Engineering, Sias University, Xinzheng, China
| | - Chenchen Lu
- School of Environment, Nanjing Normal University, Nanjing, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
| | - Yue Zhou
- School of Environment, Nanjing Normal University, Nanjing, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
| | - Yong Zhang
- Department of Geological Sciences, University of Alabama, Tuscaloosa, AL, USA
| | - Wei Wei
- School of Environment, Nanjing Normal University, Nanjing, China
- Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, Shenzhen, China
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Mosai AK, Tutu H. Recovery of platinum (IV) from aqueous solutions using 3-aminopropyl(diethoxy)methylsilane functionalized bentonite. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1847659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Alseno K. Mosai
- School of Chemistry, Molecular Sciences Institute, University of the Witwatersrand, Johannesburg, South Africa
| | - Hlanganani Tutu
- School of Chemistry, Molecular Sciences Institute, University of the Witwatersrand, Johannesburg, South Africa
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Sobhanardakani S, Zandipak R. Cerium dioxide nanoparticles decorated on CuFe2O4 nanofibers as an effective adsorbent for removal of estrogenic contaminants (bisphenol A and 17-α ethinylestradiol) from water. SEP SCI TECHNOL 2018. [DOI: 10.1080/01496395.2018.1457053] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- S. Sobhanardakani
- Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran
| | - R. Zandipak
- Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran
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