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Ngeno E, Ongulu R, Shikuku V, Ssentongo D, Otieno B, Ssebugere P, Orata F. Response surface methodology directed modeling of the biosorption of progesterone onto acid activated Moringa oleifera seed biomass: Parameters and mechanisms. CHEMOSPHERE 2024; 360:142457. [PMID: 38810799 DOI: 10.1016/j.chemosphere.2024.142457] [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: 09/18/2023] [Revised: 04/11/2024] [Accepted: 05/25/2024] [Indexed: 05/31/2024]
Abstract
In this study, chemically activated fat-free powdered Moringa oleifera seed biomass (MOSB) was synthesized, characterized, and utilized as a cost-effective biosorbent for the abstraction of progesterone (PGT) hormone from synthetic wastewater. Natural PGT is a human steroid hormone from the progestogen family. Synthetic PGT is approved for the regulation of the menstrual cycle, aiding contraception, and is administered as a hormone replacement therapy in menopausal and post-menopausal women. PGT is an endocrine disrupting chemical (EDC) with negative health impacts on biota. The X-ray diffractogram (XRD), Scanning electron microscopy-Energy-dispersive X-ray spectroscopy (SEM-EDS), and Brunauer-Emmet-Teller (BET) analyses displayed a porous, amorphous biosorbent with an elemental composition of 72.5% carbon and 22.5% oxygen and a specific surface area of 210.0 m2 g-1. The process variables including temperature (298-338 K), pH (2-10), contact time (10-180 min), adsorbate concentration (20-500 μg L-1), and adsorbent dosage (0.1-2.0 g) were optimized using response surface methodology (RSM) to obtain the greatest efficacy of MOSB during biosorption of PGT. The optimum parameters for PGT biosorption onto MOSB were: 86.8 min, 500 μg L-1 adsorbate concentration, 298 K, and 0.1 g adsorbent dosage. PGT removal from aqueous solutions was pH-independent. The Langmuir isotherm best fitted the equilibrium data with maximal monolayer biosorption capacity of 135.8 μg g-1. The biosorption rate followed the pseudo-first-order (PFO) kinetic law. The thermodynamic functions (ΔG < 0, ΔH = -9.258 kJ mol-1 and ΔS = +44.16 J mol-1) confirmed that the biosorption of PGT onto MOSB is a spontaneous and exothermic process with increased randomness at the adsorbent surface. The biosorption mechanism was physisorption and was devoid of electrostatic interactions. The findings from this study indicate that MOSB is an inexpensive, low-carbon, and environmentally friendly biosorbent that can effectively scavenge PGT from aqueous solutions.
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Affiliation(s)
- Emily Ngeno
- Department of Pure and Applied Chemistry, Masinde Muliro University of Science and Technology, P.O Box 190-50100, Kakamega, Kenya; Department of Physical Sciences, Kaimosi Friends University, P.O Box 385-50309, Kaimosi, Kenya; Department of Chemistry, Makerere University, P. O Box 7062, Kampala, Uganda
| | - Roselyn Ongulu
- Department of Pure and Applied Chemistry, Masinde Muliro University of Science and Technology, P.O Box 190-50100, Kakamega, Kenya
| | - Victor Shikuku
- Department of Physical Sciences, Kaimosi Friends University, P.O Box 385-50309, Kaimosi, Kenya
| | - Deo Ssentongo
- Department of Chemistry, Makerere University, P. O Box 7062, Kampala, Uganda
| | - Benton Otieno
- Department of Chemical and Metallurgical Engineering, Vaal University of Technology, Vanderbijlpark, South Africa
| | - Patrick Ssebugere
- Department of Chemistry, Makerere University, P. O Box 7062, Kampala, Uganda; Department of Cell Toxicology, Helmholtz Centre for Environmental Research-UFZ, 04318, Leipzig, Germany; Department of Analytical Environmental Chemistry, Helmholtz Centre for Environmental Research-UFZ, 04318, Leipzig, Germany.
| | - Francis Orata
- Department of Pure and Applied Chemistry, Masinde Muliro University of Science and Technology, P.O Box 190-50100, Kakamega, Kenya.
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Vijayan JG, Niranjana Prabhu T, Jineesh AG, Pal K, Chakroborty S. Synthesis of bagasse nanocellulose-filled composite polyurethane xerogel for the efficient adsorption of Rhodamine-B dye from aqueous solution: investigation of adsorption parameters. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2023; 46:23. [PMID: 36995479 DOI: 10.1140/epje/s10189-023-00278-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 03/06/2023] [Indexed: 05/09/2023]
Abstract
In this study, polyurethane (PU)-based xerogels were synthesized by using the biobased polyol derived from chaulmoogra seed oil. These polyol was used for the preparation of PU xerogels using methylene diphenyl diisocyanate hard segment and polyethylene glycol (PEG6000) as soft segment with 1,4-diazabicyclo[2, 2, 2]octane as catalyst. Tetrahydrofuran, acetonitrile and dimethyl sulfoxide were used as the solvents. Nanocellulose (5 wt %) prepared from bagasse were added as filler, and the obtained composite xerogels were evaluated for chemical stability. The prepared samples were also characterized by using SEM and FTIR. Waste sugarcane bagasse nanocellulose proved as a cheap reinforcer in the xerogel synthesis and for the adsorption of Rhodamine-B dye from the aqueous solution. The factors that affect the adsorption process have been studied including the quantity of the adsorbent (0.02-0.06 g), pH (6-12), temperature (30-50) and time (30-90). Central composite design for four variables and three levels with response surface methodology has been used to get second-order polynomial equation for the percentage dye removal. RSM was confirmed by the measurement of analysis of variance. Increase in the pH and quantity of the adsorbent was found to increase the sorption capacities of the xerogel (NC-PUXe) towards rhodamine B, maximum adsorption.
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Affiliation(s)
- Jyothy G Vijayan
- Department of Chemistry, M.S. Ramaiah University of Applied Sciences, IV Phase, Peenya Industrial Area, Bengaluru, 560058, India
| | - T Niranjana Prabhu
- Department of Chemistry, M.S. Ramaiah University of Applied Sciences, IV Phase, Peenya Industrial Area, Bengaluru, 560058, India.
| | - A G Jineesh
- Department of Chemistry, M.S. Ramaiah University of Applied Sciences, IV Phase, Peenya Industrial Area, Bengaluru, 560058, India
| | - Kaushik Pal
- Department of Physics, University Centre for Research and Development (UCRD), Chandigarh University, Mohali, Gharuan, Punjab, 140413, India.
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Preparation of Breadfruit Leaf Biochar for the Application of Congo Red Dye Removal from Aqueous Solution and Optimization of Factors by RSM-BBD. ADSORPT SCI TECHNOL 2023. [DOI: 10.1155/2023/7369027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
In this work, biochar produced from breadfruit leaves was utilized to remove the toxic Congo red dye. XRD, FTIR, and FESEM-EDX were implemented to characterize the biochar. Response surface methodology (RSM) and the Box-Behnken design (BBD) techniques were used to evaluate Congo red’s optimum adsorption efficiency. The adsorption of Congo red was studied by varying dye concentrations (5–50 mg/L), times (30–240 min), pH (6–9), and dosages (0.5–2 g/100 mL). X-ray diffractometer results show that the structure of biochar is amorphous. The biochar exhibited unbounded OH, aliphatic CH group, and C=O stretch, as shown by the band peaks at 3340 cm−1, 2924 cm−1, and 1625 cm−1 intensities. RSM-BBD design results showed maximum removal efficiency of 99.96% for Congo red at pH 6.37, dye concentration 45 mg/L, time 105 min, and dosage 1.92 g, respectively. The adsorption of Congo red by biochar was successfully modeled using the Langmuir model and pseudo-second-order model. The biochar produced from breadfruit leaves exhibited a high adsorption capacity of 17.81 mg/g for Congo red adsorption. It suggests that the adsorption is both homogenous monolayer and physicochemical.
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Dulla JB, B S, Alugunulla VN, Tc V. Ultrasonic treated dried turmeric leaves powder as biosorbent for enhanced removal of lead from aqueous solutions. INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY 2022:1-19. [DOI: 10.1080/03067319.2022.2089566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 06/08/2022] [Indexed: 09/27/2023]
Affiliation(s)
- John Babu Dulla
- Department of Biotechnology, Vignan’s Foundation for Science, Technology and Research, Guntur, India
| | - Sumalatha B
- Department of Chemical Engineering, Vignan’s Foundation for Science, Technology and Research, Guntur, India
| | | | - Venkateswarulu Tc
- Department of Biotechnology, Vignan’s Foundation for Science, Technology and Research, Guntur, India
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