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Eddy NO, Garg R, Garg R, Ukpe RA, Abugu H. Adsorption and photodegradation of organic contaminants by silver nanoparticles: isotherms, kinetics, and computational analysis. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 196:65. [PMID: 38112987 DOI: 10.1007/s10661-023-12194-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 11/30/2023] [Indexed: 12/21/2023]
Abstract
In view of the widespread and distribution of several classes and types of organic contaminants, increased efforts are needed to reduce their spread and subsequent environmental contamination. Although several remediation approaches are available, adsorption and photodegradation technologies are presented in this review as one of the best options because of their environmental friendliness, cost-effectiveness, accessibility, less selectivity, and wider scope of applications among others. The bandgap, particle size, surface area, electrical properties, thermal stability, reusability, chemical stability, and other properties of silver nanoparticles (AgNPS) are highlighted to account for their suitability in adsorption and photocatalytic applications, concerning organic contaminants. Literatures have been reviewed on the application of various AgNPS as adsorbent and photocatalyst in the remediation of several classes of organic contaminants. Theories of adsorption have also been outlined while photocatalysis is seen to have adsorption as the initial mechanism. Challenges facing the application of silver nanoparticles have also been highlighted and possible solutions have been presented. However, current information is dominated by applications on dyes and the view of the authors supports the need to strengthen the usefulness of AgNPS in adsorption and photodegradation of more classes of organic contaminants, especially emerging contaminants. We also encourage the simultaneous applications of adsorption and photodegradation to completely convert toxic wastes to harmless forms.
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Affiliation(s)
- Nnabuk Okon Eddy
- Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Enugu State, Nigeria.
| | - Rajni Garg
- Department of Applied Science and Humanities, Galgotias College of Engineering & Technology, Greater Noida, Uttar Pradesh, 201310, India
| | - Rishav Garg
- Department of Civil Engineering, Galgotias College of Engineering & Technology, Greater Noida, Uttar Pradesh, 201310, India
| | | | - Hillary Abugu
- Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Enugu State, Nigeria
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Waghmare C, Ghodmare S, Ansari K, Dehghani MH, Amir Khan M, Hasan MA, Islam S, Khan NA, Zahmatkesh S. Experimental investigation of H 3PO 4 activated papaya peels for methylene blue dye removal from aqueous solution: Evaluation on optimization, kinetics, isotherm, thermodynamics, and reusability studies. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118815. [PMID: 37633104 DOI: 10.1016/j.jenvman.2023.118815] [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: 03/23/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 08/28/2023]
Abstract
This investigation is centered on the effectiveness of methylene blue (MB), a cationic dye, adsorbed from an aqueous media by H3PO4 activated papaya skin/peels (PSPAC), with initial pH (2-10), contact time (30-180 min), MB dye concentration (varying from 10 to 50 mg/L), and MB dose (0.1-0.5 gm). The findings show that the best optimal conditions for MB dye removal occur at a 6 pH, 0.3 gm dose of PSPAC adsorbent for 10 mg/L MB dye concentration, with 90 min of contact time. To optimize and validate the extraction efficiency of MB dye, a response surface methodology (RSM) study was conducted using a central composite design (CCD) with a regression model showing R2 = 0.9940. FT-IR spectroscopy shows, CO, and O-H stretching functional groups while FE-SEM is assessed to supervise morphological features of the PSPAC adsorbent. The peak adsorption capacity with 46.95 mg/g for the Langmuir isotherm model conveniently satisfies the adsorption process with R2 = 0.9984 while with R2 = 0.999, a kinetic model, pseudo-second-order, confirms MB dye adsorption by PSPAC adsorbent. Moreover, thermodynamic parameters including ΔGᵒ, ΔH°, and ΔS° were computed and found to be spontaneous and exothermic. Furthermore, regeneration studies employed with NaOH (0.1 M) and HCl (0.1 M) solution media show an acceptable MB removal efficiency consecutive up to three cycles. The study highlights that H3PO4 papaya skin/peel (PSPAC) is an effectual, sustainable, reasonably available biosorbent to remove industrial cationic dyes disposal.
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Affiliation(s)
- Charuta Waghmare
- Department of Civil Engineering, Yeshwantrao Chavan College of Engineering, 441110, Nagpur, India; Department of Civil Engineering, School of Engineering and Technology, G. H. Raisoni Amravati University, 444701, Amravati, India.
| | - Sujesh Ghodmare
- Department of Civil Engineering, School of Engineering and Technology, G. H. Raisoni Amravati University, 444701, Amravati, India.
| | - Khalid Ansari
- Department of Civil Engineering, Yeshwantrao Chavan College of Engineering, 441110, Nagpur, India.
| | - Mohammad Hadi Dehghani
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran; Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran.
| | - Mohammad Amir Khan
- Department of Civil Engineering, Galgotias College of Engineering and Technology, Greater Noida-201310, India.
| | - Mohd Abul Hasan
- Civil Engineering Department, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia.
| | - Saiful Islam
- Civil Engineering Department, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia.
| | - Nadeem A Khan
- Interdisciplinary Research Center for Membranes and Water Security (IRC-MWS), King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
| | - Sasan Zahmatkesh
- Tecnologico de Monterrey, Escuela de Ingenieríay Ciencias, Puebla, Mexico.
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Sharma R, Garg R, Bali M, Eddy NO. Potential applications of green-synthesized iron oxide NPs for environmental remediation. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1397. [PMID: 37910248 DOI: 10.1007/s10661-023-12035-6] [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: 04/13/2023] [Accepted: 10/23/2023] [Indexed: 11/03/2023]
Abstract
Water pollution is a significant issue worldwide due to an increase in anthropogenic activities. Heavy metals and dyes are among the most problematic contaminants that threaten the environment and negatively impact human health. Iron oxide nanoparticles (IONPs) synthesized using green methods have shown potential in these areas due to their significant adsorption capacity and photocatalytic potential. The size and morphology of biogenic IONPs can be tailored depending upon the concentration of the reducing medium and metal salt precursor. Green-synthesized IONPs have been found to be effective, economical, and environmentally friendly with their large surface area, making them suitable for removing toxic matter from contaminated water. Furthermore, they exhibit antibacterial potential against harmful microorganisms. The study emphasizes the importance of using such environmentally friendly tools to remove heavy metal ions and organic compounds from contaminated water. The underlying mechanism for the adsorption of heavy metal ions, photocatalytic degradation of organic compounds, and antimicrobial action has been explored in detail. The future prospective for the beneficial utilization of biogenic IONPs has also been signified to provide a detailed overview.
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Affiliation(s)
- Rajat Sharma
- Department of Chemistry, USS, Rayat-Bahra University, Mohali, Punjab, 140104, India
| | - Rajni Garg
- Department of Applied Sciences, Galgotias College of Engineering & Technology, Greater Noida, Uttar Pradesh, 201310, India.
| | - Manoj Bali
- Department of Chemistry, USS, Rayat-Bahra University, Mohali, Punjab, 140104, India
| | - Nnabuk O Eddy
- Department of Pure and Industrial Chemistry, University of Nigeria, Nsukka, Enugu State, Nigeria
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