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Kotnala S, Bhushan B, Nayak A. Fabrication of nano-biocomposite for the removal of Eriochrome Black T and malachite green from aqueous solution: isotherm and kinetic studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:27846-27862. [PMID: 36394810 DOI: 10.1007/s11356-022-24054-w] [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: 07/11/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
The increasing generation of toxic dye wastewater from various enterprises continues to be a serious public health issue and happens to be of environmental concern, posing a significant challenge to existing conventional water treatment facilities. Malachite green (MG) and Eriochrome Black T (EBT) are extremely hazardous and carcinogenic substances; hence it is crucial to remove them from water bodies. A well-known cleaner, more economical, and environmentally friendly treatment method is adsorption. The kind of adsorbent material employed determines how well the treatment procedure works. A physiologically compatible nanocomposite adsorbent (HAP@CT@MNP) was fabricated from laboratory synthesized hydroxyapatite (HAP) and magnetite (MNP) for its application in the wastewater remediation process. The ability of the fabricated nanocomposite to remove the harmful dyes EBT and MG from a simulated wastewater was evaluated. The impact of operational parameters including pH, adsorbate concentration, adsorbent dose, contact time, and temperature was examined to gauge the maximum adsorption capacity of the developed nanocomposite. The optimum pH for the eradication of EBT and MG were found to be 3 and 7.4, respectively. The maximum capacity evaluated was 222 mg/g and 500 mg/g at room temperature and at contact time of 50 and 40 min respectively. The binding of either EBT or MG followed the monolayer Langmuir model and kinetic studies revealed the suitability of pseudo-second-order model. Studies using spectroscopy and isotherm modeling showed that the main mechanism controlling the adsorption of EBT and MG onto HAP@CT@MNP is physisorption. The efficacy of the adsorbent to be reused with 8% loss in its efficiency reveals the economic viability of HAP@CT@MNP. The current work showed that a biocompatible nanocomposite could be successfully fabricated and used as an enhanced adsorbent for the quick and effective removal of the toxic dyes EBT and MG from wastewater.
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Affiliation(s)
- Shreya Kotnala
- Department of Chemistry, Graphic Era University, 248002, Dehradun, India
- Department of Chemistry, School of Basic & Applied Sciences, SGRR University, Dehradun, India
| | - Brij Bhushan
- Department of Chemistry, Graphic Era University, 248002, Dehradun, India.
| | - Arunima Nayak
- Department of Chemistry, Graphic Era University, 248002, Dehradun, India
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rGO-WO3 Heterostructure: Synthesis, Characterization and Utilization as an Efficient Adsorbent for the Removal of Fluoroquinolone Antibiotic Levofloxacin in an Aqueous Phase. Molecules 2022; 27:molecules27206956. [PMID: 36296547 PMCID: PMC9610797 DOI: 10.3390/molecules27206956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 10/07/2022] [Accepted: 10/14/2022] [Indexed: 11/16/2022] Open
Abstract
Herein, the heterostructure rGO-WO3 was hydrothermally synthesized and characterized by HRTEM (high-resolution transmission electron microscopy), FESEM (field emission scanning electron microscopy), XRD (X-ray diffraction), FT-IR (Fourier transform infrared spectroscopy), XPS (X-ray photoelectron microscopy), nitrogen physisorption isotherm, Raman, TGA (thermogravimetric analysis) and zeta potential techniques. The HRTEM and FESEM images of the synthesized nanostructure revealed the successful loading of WO3 nanorods on the surface of rGO nanosheets. The prepared heterostructure was utilized as an efficient adsorbent for the removal of a third-generation fluoroquinolone antibiotic, i.e., levofloxacin (LVX), from water. The adsorption equilibrium data were appropriately described by a Langmuir isotherm model. The prepared rGO-WO3 heterostructure exhibited a Langmuir adsorption capacity of 73.05 mg/g. The kinetics of LVX adsorption followed a pseudo-second-order kinetic model. The adsorption of LVX onto the rGO-WO3 heterostructure was spontaneous and exothermic in nature. Electrostatic interactions were found to have played a significant role in the adsorption of LVX onto the rGO-WO3 heterostructure. Thus, the prepared rGO-WO3 heterostructure is a highly promising material for the removal of emerging contaminants from aqueous solution.
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Mohammad REA, Elbashir AA, Karim J, Yahaya N, Rahim NY, Miskam M. Development of deep eutectic solvents based ferrofluid for liquid phase microextraction of ofloxacin and sparfloxacin in water samples. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Shi T, Xie Z, Mo X, Feng Y, Peng T, Song D. Highly Efficient Adsorption of Heavy Metals and Cationic Dyes by Smart Functionalized Sodium Alginate Hydrogels. Gels 2022; 8:gels8060343. [PMID: 35735687 PMCID: PMC9222840 DOI: 10.3390/gels8060343] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 05/21/2022] [Accepted: 05/25/2022] [Indexed: 02/01/2023] Open
Abstract
In this paper, functionalized sodium alginate hydrogel (FSAH) was prepared to efficiently adsorb heavy metals and dyes. Hydrazide-functionalized sodium alginate (SA) prepared hydrazone groups to selectively capture heavy metals (Pb2+, Cd2+, and Cu2+), and another functional group (dopamine grafting), serves as sites for adsorption methylene blue (MB), malachite green (MG), crystal violet (CV). Thermodynamic parameters of adsorption indicated that the adsorption process is endothermic and spontaneous. The heavy metals adsorption by FSAH was physical adsorption mainly due to ΔHθ < 40 kJ/mol, and the adsorption of cationic dyes fitted with the Langmuir models, which indicated that the monolayer adsorption is dominated by hydrogen bonds, electrostatic interactions, and π-π interactions. Moreover, the adsorption efficiency maintained above 70% after five adsorption-desorption cycles. To sum up, FSAH has great application prospect.
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Affiliation(s)
- Tianzhu Shi
- Department of Brewing Engineering, Moutai Institute, Renhuai 564500, China; (X.M.); (Y.F.); (T.P.); (D.S.)
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China;
- Correspondence: ; Tel.: +86-185-8642-0308
| | - Zhengfeng Xie
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China;
| | - Xinliang Mo
- Department of Brewing Engineering, Moutai Institute, Renhuai 564500, China; (X.M.); (Y.F.); (T.P.); (D.S.)
| | - Yulong Feng
- Department of Brewing Engineering, Moutai Institute, Renhuai 564500, China; (X.M.); (Y.F.); (T.P.); (D.S.)
| | - Tao Peng
- Department of Brewing Engineering, Moutai Institute, Renhuai 564500, China; (X.M.); (Y.F.); (T.P.); (D.S.)
| | - Dandan Song
- Department of Brewing Engineering, Moutai Institute, Renhuai 564500, China; (X.M.); (Y.F.); (T.P.); (D.S.)
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Zhu T, Qi P, Wang J, Di S, Wang Z, Xu H, Zhao H, Wang Q, Wang X, Zhang C. Zeolitic imidazolate framework-8 as a dispersive solid phase extraction sorbent for simultaneous determination of 145 pesticide residues in polyphenol-rich plants. J Sep Sci 2022; 45:1326-1335. [PMID: 35172035 DOI: 10.1002/jssc.202100814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 01/21/2022] [Accepted: 01/24/2022] [Indexed: 11/09/2022]
Abstract
Many plants showed higher polyphenol content, which caused the matrix effect and made the analysis of trace pesticide residues highly challenging. A common approach to improving matrix effects is to purify pesticides through the use of sorbents, but this requires a combination of multiple sorbents and extensive use. Zeolitic imidazolate framework-8 is widely used for pesticide analysis due to its high porosity, large specific surface area and versatility. Here, We established and validated a modified quick, easy, cheap, effective, rugged, and safe method based on a zeolitic imidazolate framework-8 that was used to test the removal ability for polyphenols. And 145 pesticide residues in peppermint, perilla, fennel, and mulberry leaves were analyzed by the modified method coupled with LC-MS/MS. The mean recoveries of all pesticide residues were in the range of 74.3%-103.7%, with mean relative standard deviations≤ 9.1% at spiked concentrations of 1, 10, 50, and 100 μg kg-1 for mulberry leaves. The limits of quantitation of the method ranged from 1 to 50 μg kg-1 . This study offers a reliable approach for the accurate quantitative analysis of various trace substances in the polyphenol-rich plants. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Telin Zhu
- College of Food Science and Engineering, Hainan University, Haikou, 570228, China
| | - Peipei Qi
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, P. R. China.,Key Laboratory of Detection for Pesticide Residues and Control of Zhejiang, Hangzhou, 310021, P. R. China.,Agricultural Ministry Key Laboratory for Pesticide Residue Detection, Hangzhou, 310021, P. R. China
| | - Jiao Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, P. R. China.,Key Laboratory of Detection for Pesticide Residues and Control of Zhejiang, Hangzhou, 310021, P. R. China.,Agricultural Ministry Key Laboratory for Pesticide Residue Detection, Hangzhou, 310021, P. R. China
| | - Shanshan Di
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, P. R. China.,Key Laboratory of Detection for Pesticide Residues and Control of Zhejiang, Hangzhou, 310021, P. R. China.,Agricultural Ministry Key Laboratory for Pesticide Residue Detection, Hangzhou, 310021, P. R. China
| | - Zhiwei Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, P. R. China.,Key Laboratory of Detection for Pesticide Residues and Control of Zhejiang, Hangzhou, 310021, P. R. China.,Agricultural Ministry Key Laboratory for Pesticide Residue Detection, Hangzhou, 310021, P. R. China
| | - Hao Xu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, P. R. China.,Key Laboratory of Detection for Pesticide Residues and Control of Zhejiang, Hangzhou, 310021, P. R. China.,Agricultural Ministry Key Laboratory for Pesticide Residue Detection, Hangzhou, 310021, P. R. China
| | - Huiyu Zhao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, P. R. China.,Key Laboratory of Detection for Pesticide Residues and Control of Zhejiang, Hangzhou, 310021, P. R. China.,Agricultural Ministry Key Laboratory for Pesticide Residue Detection, Hangzhou, 310021, P. R. China
| | - Qiang Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, P. R. China.,Key Laboratory of Detection for Pesticide Residues and Control of Zhejiang, Hangzhou, 310021, P. R. China.,Agricultural Ministry Key Laboratory for Pesticide Residue Detection, Hangzhou, 310021, P. R. China
| | - Xinquan Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, P. R. China.,Key Laboratory of Detection for Pesticide Residues and Control of Zhejiang, Hangzhou, 310021, P. R. China.,Agricultural Ministry Key Laboratory for Pesticide Residue Detection, Hangzhou, 310021, P. R. China
| | - Chenghui Zhang
- College of Food Science and Engineering, Hainan University, Haikou, 570228, China
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Shi T, Xie Z, Zhu Z, Shi W, Liu Y, Liu M, Mo X. Effective removal of metal ions and cationic dyes from aqueous solution using different hydrazine-dopamine modified sodium alginate. Int J Biol Macromol 2022; 195:317-328. [PMID: 34914908 DOI: 10.1016/j.ijbiomac.2021.12.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/03/2021] [Accepted: 12/05/2021] [Indexed: 12/13/2022]
Abstract
In this paper, DSA-AAD-DA and DSA-TPDH-DA were prepared to effectively remove metal ions and cationic dyes from aqueous solution. The hydrazone structure was prepared by hydrazide-modified SA which captured metal ions selectively, and the remaining functional groups were used as active adsorption sites for cationic dyes. The thermodynamic parameter for the sorption demonstrated the process is endothermic and spontaneous. In single process, the adsorption of metal ions by DSA-AAD-DA and DSA-TPDH-DA correlated well with the Freundlich model through the hydrazone structure coordination and ion exchange which was mainly chemical adsorption, and cationic dyes adsorption correlated well with the Langmuir model which was shown monolayer adsorption was dominant by hydrogen bonding, electrostatic interaction, and π-π interaction. In binary system, the mixed adsorption shown significant antagonism effect in high concentration, but cationic dyes and metal ions in low concentration were efficiently and simultaneously removed, the adsorption ability of DSA-TPDH-DA was much better than DSA-AAD-DA. Moreover, adsorption efficiency can still maintain more than 80% after five times adsorption-desorption recycle. Therefore, DSA-AAD-DA and DSA-TPDH-DA possessed great potential for wastewater treatment.
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Affiliation(s)
- Tianzhu Shi
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China; Department of Brewing Engineering, Moutai Institute, Renhuai, Guizhou 564500, China
| | - Zhengfeng Xie
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, China.
| | - Zhu Zhu
- Inspection Department, Guizhou Provincial Institute for Quality Inspection and Testing of Liquor Products, Renhuai, Guizhou 564500, China
| | - Wei Shi
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China
| | - Yucheng Liu
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, China
| | - Minyao Liu
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China
| | - Xinliang Mo
- Department of Brewing Engineering, Moutai Institute, Renhuai, Guizhou 564500, China
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Low-Cost and Eco-Friendly Hydroxyapatite Nanoparticles Derived from Eggshell Waste for Cephalexin Removal. SEPARATIONS 2022. [DOI: 10.3390/separations9010010] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
This work describes the hydroxyapatite nanoparticle (HAP) preparation from eggshell waste and their application as an adsorbent for Cephalexin (Ceph) antibiotic removal from aqueous solutions. Chemical precipitation with phosphoric acid was used to evaluate the feasibility of calcium oxide for HAP preparation. The structural properties of HAP were characterized by X-ray diffraction, which revealed the formation of the hydroxyapatite crystalline phase formation. In addition, transmitting electron spectroscopy showed an irregular shape with a variation in size. The impact of various experimental conditions on the removal efficiency such as the solution’s pH, contact time, HAP mass, solution temperature, and Ceph concentration were studied. Experimental data showed that HAP could remove most Ceph species from aqueous solutions within 1 h at pH = 7 with 70.70% adsorption efficiency utilizing 50 mg of the HAP. The removal process of Ceph species by HAP was kinetically investigated using various kinetic models, and the results showed the suitability of the pseudo-second-order kinetic model for the adsorption process description. Moreover, the removal process was thermodynamically investigated; the results showed that the removal was spontaneous endothermic and related to the randomness increase. The data confirmed that HAP had high efficiency in removing Ceph antibiotics from an aqueous solution.
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Jaswal A, Kaur M, Singh S, Kansal SK, Umar A, Garoufalis CS, Baskoutas S. Adsorptive removal of antibiotic ofloxacin in aqueous phase using rGO-MoS 2 heterostructure. JOURNAL OF HAZARDOUS MATERIALS 2021; 417:125982. [PMID: 33992005 DOI: 10.1016/j.jhazmat.2021.125982] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 04/22/2021] [Accepted: 04/24/2021] [Indexed: 06/12/2023]
Abstract
This paper reports the synthesis, characterization and detailed adsorption studies of rGO-MoS2 heterostructure. The heterostructure was explored for the adsorption of ofloxacin from the aqueous phase. Detailed studies were conducted to study the effect of crucial parameters such as pH of drug solution, adsorbent dose, temperature and initial drug concentration on the adsorption capacity. Even with a low surface area of 17.17 m2/g, the adsorbent exhibited maximum removal efficiency of 95% at a dose of 0.35 g/L and an initial drug concentration of 10 mg/L in 240 min. Thermodynamic study revealed the values for ∆H0 and ∆G0 to be - 101.15 and - 7.47 kJ/mol respectively, indicating that the process is spontaneous and exothermic in nature. The heterostructure adsorbent exhibited remarkable reusability and stability up to five cycles. The heterostructure combines excellent adsorption capabilities arising from the two-dimensional structures of rGO and MoS2 with the stronger and more specific interaction with the drug molecules which results in better performance towards the removal of the drug. The excellent performance of the heterostructure indicates that combining 2D materials can be a good strategy for producing highly efficient materials towards the adsorptive removal of pollutants.
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Affiliation(s)
- Anurag Jaswal
- Dr. S.S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh 160014, India
| | - Manjot Kaur
- Department of Chemistry and Centre of Advanced Studies, Panjab University, Chandigarh 160014, India
| | - Surinder Singh
- Dr. S.S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh 160014, India
| | - Sushil Kumar Kansal
- Dr. S.S. Bhatnagar University Institute of Chemical Engineering and Technology, Panjab University, Chandigarh 160014, India.
| | - Ahmad Umar
- Department of Chemistry, Faculty of Science and Arts, Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran 11001, Kingdom of Saudi Arabia.
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Yadav S, Asthana A, Singh AK, Chakraborty R, Vidya SS, Susan MABH, Carabineiro SAC. Adsorption of cationic dyes, drugs and metal from aqueous solutions using a polymer composite of magnetic/β-cyclodextrin/activated charcoal/Na alginate: Isotherm, kinetics and regeneration studies. JOURNAL OF HAZARDOUS MATERIALS 2021; 409:124840. [PMID: 33482479 DOI: 10.1016/j.jhazmat.2020.124840] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 12/08/2020] [Accepted: 12/10/2020] [Indexed: 06/12/2023]
Abstract
In this work, we successfully synthesized novel polymer gel beads based on functionalized iron oxide (Fe3O4), activated charcoal (AC) particles with β-cyclodextrin (CD) and sodium alginate (SA) polymer (Fe3O4/CD/AC/SA), by a simple, reproducible and inexpensive method. These beads proved to be versatile and strong adsorbents with magnetic properties and high adsorption capacity. The composites were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, vibrating sample magnetometry, adsorption at -196 °C, high resolution transmission electron microscopy, thermogravimetric analysis and point of zero charge measurements. Two dyes, two drugs and one metal were used to test the adsorption capability of the prepared polymer nanocomposite. The adsorbent showed good removal efficiencies for the studied pollutants, especially the cationic dyes and the metal, when compared to other low-cost adsorbents. The saturated adsorption capacity of Fe3O4/CD/AC/SA reached 5.882 mg g-1 for methyl violet (MV), 2.283 mg g-1 for brilliant green (BG), 2.551 mg g-1 for norfloxacin (NOX), 3.125 mg g-1 for ciprofloxacin (CPX), 10.10 mg g-1 for copper metal ion (Cu(II)). The adsorption isotherm studies showed that data fitted well with Langmuir and Temkin isotherms models. The kinetic data showed good correlation coefficient with low error function for the pseudo-second order kinetic model. The data analysis was carried out using error and regression coefficient functions for the estimation of best-fitting isotherm and kinetic models, namely: chi-square test (χ2) and sum of the squares of errors (SSE). The activation energy was found to be 47.68 kJ mol-1 for BG, 29.09 kJ mol-1 for MV, 28.93 kJ mol-1 for NOX, 4.53 kJ mol-1 for CPX and 17.08 kJ mol-1 for Cu(II), which represent chemisorption and physisorption behavior of sorbent molecules. The polymer composites can be regenerated and easily separated from aqueous solution without any weight loss. After regeneration, the Fe3O4/CD/AC/SA beads still have good adsorption capacities up to four cycles of desorption and adsorption. The results indicate that the polymer gel beads are promising adsorbents for the removal of different categories of toxicants (like dyes, drugs and metal) in single adsorbate aqueous systems. Thus, the novel Fe3O4/CD/AC/SA beads can be effectively employed for a large-scale applications as environmentally compatible materials for the adsorption of different categories of pollutants.
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Affiliation(s)
- Sushma Yadav
- Department of Chemistry, Govt. V.Y.T. PG Autonomous College Durg, 491001 Chhattisgarh, India
| | - Anupama Asthana
- Department of Chemistry, Govt. V.Y.T. PG Autonomous College Durg, 491001 Chhattisgarh, India
| | - Ajaya Kumar Singh
- Department of Chemistry, Govt. V.Y.T. PG Autonomous College Durg, 491001 Chhattisgarh, India.
| | - Rupa Chakraborty
- Department of Chemistry, Govt. V.Y.T. PG Autonomous College Durg, 491001 Chhattisgarh, India
| | - S Sree Vidya
- Department of Chemistry, Kalyan PG College, Durg, India
| | | | - Sónia A C Carabineiro
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
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Silva AR, Cavaleiro AJ, Soares OSGP, Braga CS, Salvador AF, Pereira MFR, Alves MM, Pereira L. Detoxification of Ciprofloxacin in an Anaerobic Bioprocess Supplemented with Magnetic Carbon Nanotubes: Contribution of Adsorption and Biodegradation Mechanisms. Int J Mol Sci 2021; 22:ijms22062932. [PMID: 33805783 PMCID: PMC7999377 DOI: 10.3390/ijms22062932] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/01/2021] [Accepted: 03/10/2021] [Indexed: 12/26/2022] Open
Abstract
In anaerobic bioreactors, the electrons produced during the oxidation of organic matter can potentially be used for the biological reduction of pharmaceuticals in wastewaters. Common electron transfer limitations benefit from the acceleration of reactions through utilization of redox mediators (RM). This work explores the potential of carbon nanomaterials (CNM) as RM on the anaerobic removal of ciprofloxacin (CIP). Pristine and tailored carbon nanotubes (CNT) were first tested for chemical reduction of CIP, and pristine CNT was found as the best material, so it was further utilized in biological anaerobic assays with anaerobic granular sludge (GS). In addition, magnetic CNT were prepared and also tested in biological assays, as they are easier to be recovered and reused. In biological tests with CNM, approximately 99% CIP removal was achieved, and the reaction rates increased ≈1.5-fold relatively to the control without CNM. In these experiments, CIP adsorption onto GS and CNM was above 90%. Despite, after applying three successive cycles of CIP addition, the catalytic properties of magnetic CNT were maintained while adsorption decreased to 29 ± 3.2%, as the result of CNM overload by CIP. The results suggest the combined occurrence of different mechanisms for CIP removal: adsorption on GS and/or CNM, and biological reduction or oxidation, which can be accelerated by the presence of CNM. After biological treatment with CNM, toxicity towards Vibrio fischeri was evaluated, resulting in ≈ 46% detoxification of CIP solution, showing the advantages of combining biological treatment with CNM for CIP removal.
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Affiliation(s)
- Ana R. Silva
- CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; (A.R.S.); (A.J.C.); (C.S.N.B.); (A.F.S.); (M.M.A.)
| | - Ana J. Cavaleiro
- CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; (A.R.S.); (A.J.C.); (C.S.N.B.); (A.F.S.); (M.M.A.)
| | - O. Salomé G. P. Soares
- Laboratory of Separation and Reaction Engineering, Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal; (O.S.G.P.S.); (M.F.R.P.)
| | - Cátia S.N. Braga
- CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; (A.R.S.); (A.J.C.); (C.S.N.B.); (A.F.S.); (M.M.A.)
| | - Andreia F. Salvador
- CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; (A.R.S.); (A.J.C.); (C.S.N.B.); (A.F.S.); (M.M.A.)
| | - M. Fernando R. Pereira
- Laboratory of Separation and Reaction Engineering, Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal; (O.S.G.P.S.); (M.F.R.P.)
| | - M. Madalena Alves
- CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; (A.R.S.); (A.J.C.); (C.S.N.B.); (A.F.S.); (M.M.A.)
| | - Luciana Pereira
- CEB, Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; (A.R.S.); (A.J.C.); (C.S.N.B.); (A.F.S.); (M.M.A.)
- Correspondence:
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Yadav S, Asthana A, Singh AK, Chakraborty R, Sree Vidya S, Singh A, Carabineiro SAC. Methionine-Functionalized Graphene Oxide/Sodium Alginate Bio-Polymer Nanocomposite Hydrogel Beads: Synthesis, Isotherm and Kinetic Studies for an Adsorptive Removal of Fluoroquinolone Antibiotics. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:568. [PMID: 33668774 PMCID: PMC7996286 DOI: 10.3390/nano11030568] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/19/2021] [Accepted: 02/20/2021] [Indexed: 12/17/2022]
Abstract
In spite of the growing demand for new antibiotics, in the recent years, the occurrence of fluoroquinolone antibiotics (as a curative agent for urinary tract disorders and respiratory problems) in wastewater have drawn immense attention. Traces of antibiotic left-overs are present in the water system, causing noxious impact on human health and ecological environments, being a global concern. Our present work aims at tackling the major challenge of toxicity caused by antibiotics. This study deals with the efficient adsorption of two commonly used fluoroquinolone (FQ) antibiotics, i.e., Ofloxacin (OFX) and Moxifloxacin (MOX) on spherical hydrogel beads generated from methionine‒functionalized graphene oxide/ sodium alginate polymer (abbreviated Met-GO/SA) from aqueous solutions. The composition, morphology and crystal phase of prepared adsorbents were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), high-resolution transmission electron microscopy (HR-TEM) and thermogravimetric analysis/differential thermogravimetry (TGA/DTG). Batch adsorption tests are followed to optimize the conditions required for adsorption process. Both functionalized and non-functionalized adsorbents were compared to understand the influence of several experimental parameters, such as, the solution pH, contact time, adsorbent dosage, temperature and initial concentration of OFX and MOX on adsorption. The obtained results indicated that the functionalized adsorbent (Met-GO/SA) showed a better adsorption efficiency when compared to non-functionalized (GO/SA) adsorbent. Further, the Langmuir isotherm was validated as the best fitting model to describe adsorption equilibrium and pseudo second-order-kinetic model fitted well for both types of adsorbate. The maximum adsorption capacities of Met-GO/SA were 4.11 mg/g for MOX and 3.43 mg/g for OFX. Thermodynamic parameters, i.e., ∆G°, ∆H° and ∆S° were also calculated. It was shown that the overall adsorption process was thermodynamically favorable, spontaneous and exothermic in nature. The adsorbents were successfully regenerated up to four cycles with 0.005 M NaCl solutions. Overall, our work showed that the novel Met-GO/SA nanocomposite could better contribute to the removal of MOX and OFX from the liquid media. The gel beads prepared have adequate features, such as simple handling, eco-friendliness and easy recovery. Hence, polymer gel beads are promising candidates as adsorbents for large-scale water remediation.
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Affiliation(s)
- Sushma Yadav
- Department of Chemistry, Govt. V.Y.T. PG Autonomous College, Durg 491001, India; (S.Y.); (A.A.); (R.C.)
| | - Anupama Asthana
- Department of Chemistry, Govt. V.Y.T. PG Autonomous College, Durg 491001, India; (S.Y.); (A.A.); (R.C.)
| | - Ajaya Kumar Singh
- Department of Chemistry, Govt. V.Y.T. PG Autonomous College, Durg 491001, India; (S.Y.); (A.A.); (R.C.)
| | - Rupa Chakraborty
- Department of Chemistry, Govt. V.Y.T. PG Autonomous College, Durg 491001, India; (S.Y.); (A.A.); (R.C.)
| | - S. Sree Vidya
- Department of Chemistry, Kalyan PG College, Durg 490006, India;
| | - Ambrish Singh
- School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China;
| | - Sónia A. C. Carabineiro
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal;
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Iron Oxide/Phosphatic Materials Composites with Potential Applications in Environmental Protection. MATERIALS 2020; 13:ma13215034. [PMID: 33171673 PMCID: PMC7664691 DOI: 10.3390/ma13215034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 11/02/2020] [Accepted: 11/06/2020] [Indexed: 11/24/2022]
Abstract
Currently, hydroxyapatite is probably the most researched material, due to its multiple applications in medical, environmental, or cultural heritage, when the classical structure is modified and calcium is displaced partially or totally with different metals. By changing the classical structure of the hydroxyapatite, new morphologies can be obtained, thus allowing final applications different from those of the initial hydroxyapatite material. However, their properties should be tuned for the desired application. In this context, the present paper describes the synthesis and characterization (through energy-dispersive X-ray fluorescence, X-ray diffraction, FTIR, thermal analysis, and transmission electron microscopy) of iron oxide/manganese-containing phosphatic phase composite materials, developed in order to obtain the enhancement of final environmental applications (photodegradation of dyes, adsorption of organic compounds). The composite material was tested for photocatalytic properties, after embedding in hydrosoluble film-forming materials. Photocatalytic coatings show different activity during the photodecomposition of Methylene Blue, used as a model of a contaminant. The photocatalytic activities of the materials were discussed in relationship with both the phosphatic materials and the magnetic components. Finally, other environmental applications were studied for the developed materials (adsorption of non-steroidal anti-inflammatory drugs—paracetamol and ibuprofen), revealing an enhancement of the adsorption capacity of the phosphatic material upon addition of the magnetic phase.
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14
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Dan H, Li N, Xu X, Gao Y, Huang Y, Akram M, Yin W, Gao B, Yue Q. Mechanism of sonication time on structure and adsorption properties of 3D peanut shell/graphene oxide aerogel. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 739:139983. [PMID: 32544692 DOI: 10.1016/j.scitotenv.2020.139983] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 06/02/2020] [Accepted: 06/03/2020] [Indexed: 06/11/2023]
Abstract
A 3D pretreated peanut shell-supported graphene oxide (PPS/GO) aerogel has been facilely prepared through a brief sonication + freeze-shaping technique, avoiding the traditional application of hydrothermal method which suffered from high temperature and long reaction time as well as significant loss of oxygen-containing functional groups. It was then employed to efficient norfloxacin (NOR) removal from aqueous medium. The mechanism of sonication time on the structure and adsorption properties of as-obtained PPS/GO aerogels was emphatically discussed via combining instrumental analyses, batch adsorption experiments and density functional theory (DFT) calculations. Results showed that the 3D PPS/GO aerogel with a decrease in oxygen functional groups and an increase in sp2-derived sp3 hybridization regions was observed as sonication time provided in excess, causing the worse removal efficiency towards NOR. The resulting PPS/GO(5:1) aerogel obtained at sonication of 2 min and GO loading content of 200 mg/(PPS)g exhibited the optimal NOR adsorption capacity (pH 6.2, 228.83 mg g-1). DFT calculations further identified that the sp3-hybridized areas in PPS/GO aerogel had much lower adsorption energy (ΔE, -6.69 kcal/mol) towards NOR as compared with that of sp2-hybridized zones (-12.45 kcal/mol). In addition, multiple interactions were involved in the adsorption of NOR by 3D PPS/GO aerogel, including electrostatic attraction, H-bonding, π-π conjugation and hydrophobic effect.
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Affiliation(s)
- Hongbing Dan
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Nan Li
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Xing Xu
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Yue Gao
- School of Environment, State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China.
| | - Ying Huang
- Shenzhen Chang Long Technology Co., Ltd., Shenzhen 518060, China
| | - Muhammad Akram
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Weiyan Yin
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Baoyu Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Qinyan Yue
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
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Chollom MN, Rathilal S, Swalaha FM, Bakare BF. Adsorptive removal of veterinary antibiotics from water using an integrated photocatalyst (IPCA). ACTA ACUST UNITED AC 2020. [DOI: 10.1080/00207233.2020.1723952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Martha N. Chollom
- Department of Chemical Engineering, Durban University of Technology, Durban, South Africa
| | - Sudesh Rathilal
- Department of Chemical Engineering, Durban University of Technology, Durban, South Africa
| | - Feroz M. Swalaha
- Department of Chemical Engineering, Durban University of Technology, Durban, South Africa
| | - Babatunde F Bakare
- Department of Chemical Engineering, Mangosuthu University of Technology, Durban, South Africa
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Otalvaro JO, Avena M, Brigante M. Adsorption of norfloxacin on a hexagonal mesoporous silica: isotherms, kinetics and adsorbent reuse. ADSORPTION 2019. [DOI: 10.1007/s10450-019-00100-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Benedini L, Placente D, Ruso J, Messina P. Adsorption/desorption study of antibiotic and anti-inflammatory drugs onto bioactive hydroxyapatite nano-rods. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:180-190. [PMID: 30889690 DOI: 10.1016/j.msec.2019.01.098] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 01/05/2019] [Accepted: 01/22/2019] [Indexed: 01/19/2023]
Abstract
The use of high doses of antibacterial and anti-inflammatory drugs for patients with bone diseases, associated to implants or bone filling, can develop adverse effects; and consequently, it promotes to think new strategies to avoid this problem. In this work, it has been described the adsorption/release (or desorption) behavior of two drugs, ciprofloxacin (CIP) and ibuprofen (IBU), onto hydroxyapatite (nano-HA) at 37 °C. Through Ultraviolet-Visible (UV-Vis) spectroscopy, the concentrations of both drugs in adsorption, kinetic and desorption processes were obtained. The Fourier Transformed-Infrared (FT-IR) spectroscopy, Zeta-potential (ζ-potential), High-Resolution Transmission Electron Microscopy (H-TEM) and x-Ray Diffraction (xRD) were also used to characterize bared nanoparticles and those with adsorbed drugs. Five adsorption models (Langmuir, Freundlich, Sips, Temkin and Dubinin-Radushkevich) were used for describing the behavior of both active compounds. The adsorption processes (CIP/nano-HA and IBU/nano-HA) were better predicted by the Sips model than by the others. The kinetic adsorption data were processed, for both active agents, by application of Avrami's model. Desorption/release process (of both drugs) was evaluated though Korsmeyer-Peppas (K-P) model. Owing to the predictability of these systems, we propose the use of these active ceramics as potential bone filler for improving the treatment against bacterial bone infections and to avoid its associated inflammatory process.
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Affiliation(s)
- Luciano Benedini
- Department of Chemistry, Universidad Nacional del Sur, B8000CPB Bahía Blanca, INQUISUR-CONICET, Argentina.
| | - Damián Placente
- Department of Chemistry, Universidad Nacional del Sur, B8000CPB Bahía Blanca, INQUISUR-CONICET, Argentina
| | - Juan Ruso
- Soft Matter and Molecular Biophysics Group, Department of Applied Physics, University of Santiago de Compostela, 15782, Spain
| | - Paula Messina
- Department of Chemistry, Universidad Nacional del Sur, B8000CPB Bahía Blanca, INQUISUR-CONICET, Argentina
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18
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Zhang J, Khan MA, Xia M, Abdo AM, Lei W, Liao C, Wang F. Facile hydrothermal synthesis of magnetic adsorbent CoFe 2O 4/MMT to eliminate antibiotics in aqueous phase: tetracycline and ciprofloxacin. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:215-226. [PMID: 30387065 DOI: 10.1007/s11356-018-3452-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 10/11/2018] [Indexed: 06/08/2023]
Abstract
A highly resourceful, eco-friendly, and recyclable magnetic adsorbent based on montmorillonite (CoFe2O4/MMT) was fabricated via a facile hydrothermal method to harvest tetracycline (TC) and ciprofloxacin (CIP) from pollutant water. The prepared adsorbent was characterized by XRD, FT-IR, SEM, and VSM methods to comprehend its structure, morphology, and magnetism. Effects of experimental parameters including solution pH, adsorption time, initial concentration, and ion strength were studied in details. The experimental adsorption data of TC and CIP fitted into pseudo-second-order kinetic model and Langmuir isotherm, respectively. The maximum adsorptions of TC and CIP could reach up to 240.91 and 224.00 mg/g. The thermodynamic study indicates that the adsorption process is spontaneous. In addition, the antibiotics can be further degraded under visible light environment and the magnetic sorbent can also be thermally regenerated. Graphical abstract ᅟ.
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Affiliation(s)
- Juan Zhang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Muhammad Asim Khan
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Mingzhu Xia
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China.
| | - Abdelnasir Mahmoud Abdo
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Wu Lei
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Chuan Liao
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China
| | - Fengyun Wang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China.
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19
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Omolo CA, Kalhapure RS, Agrawal N, Rambharose S, Mocktar C, Govender T. Formulation and Molecular Dynamics Simulations of a Fusidic Acid Nanosuspension for Simultaneously Enhancing Solubility and Antibacterial Activity. Mol Pharm 2018; 15:3512-3526. [PMID: 29953816 DOI: 10.1021/acs.molpharmaceut.8b00505] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The aim of the present study was to formulate a nanosuspension (FA-NS) of fusidic acid (FA) to enhance its aqueous solubility and antibacterial activity. The nanosuspension was characterized using various in vitro, in silico, and in vivo techniques. The size, polydispersity index, and zeta potential of the optimized FA-NS were 265 ± 2.25 nm, 0.158 ± 0.026, and -16.9 ± 0.794 mV, respectively. The molecular dynamics simulation of FA and Poloxamer-188 showed an interaction and binding energy of -74.42 kJ/mol and -49.764 ± 1.298 kJ/mol, respectively, with van der Waals interactions playing a major role in the spontaneous binding. There was an 8-fold increase in the solubility of FA in a nanosuspension compared to the bare drug. The MTT assays showed a cell viability of 75-100% confirming the nontoxic nature of FA-NS. In vitro antibacterial activity revealed a 16- and 18-fold enhanced activity against Staphylococcus aureus (SA) and methicillin-resistant SA (MRSA), respectively, when compared to bare FA. Flowcytometry showed that MRSA cells treated with FA-NS had almost twice the percentage of dead bacteria in the population, despite having an 8-fold lower MIC in comparison to the bare drug. The in vivo skin-infected mice showed a 76-fold reduction in the MRSA load for the FA-NS treated group compared to that of the bare FA. These results show that the nanosuspension of antibiotics can enhance their solubility and antibacterial activity simultaneously.
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Affiliation(s)
- Calvin A Omolo
- Discipline of Pharmaceutical Sciences , College of Health Sciences, University of KwaZulu-Natal , Private Bag , X54001 Durban , South Africa
| | - Rahul S Kalhapure
- Discipline of Pharmaceutical Sciences , College of Health Sciences, University of KwaZulu-Natal , Private Bag , X54001 Durban , South Africa.,School of Pharmacy , The University of Texas at El Paso , 500 W. University Avenue , El Paso , Texas 79968 , United States
| | - Nikhil Agrawal
- Discipline of Pharmaceutical Sciences , College of Health Sciences, University of KwaZulu-Natal , Private Bag , X54001 Durban , South Africa
| | - Sanjeev Rambharose
- Discipline of Pharmaceutical Sciences , College of Health Sciences, University of KwaZulu-Natal , Private Bag , X54001 Durban , South Africa.,Division of Emergency Medicine, Department of Surgery , University of Cape Town , Cape Town 7700 , South Africa
| | - Chunderika Mocktar
- Discipline of Pharmaceutical Sciences , College of Health Sciences, University of KwaZulu-Natal , Private Bag , X54001 Durban , South Africa
| | - Thirumala Govender
- Discipline of Pharmaceutical Sciences , College of Health Sciences, University of KwaZulu-Natal , Private Bag , X54001 Durban , South Africa
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20
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Zhao C, Ren S, Zuo Q, Wang S, Zhou Y, Liu W, Liang S. Effect of nanohydroxyapatite on cadmium leaching and environmental risks under simulated acid rain. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 627:553-560. [PMID: 29426178 DOI: 10.1016/j.scitotenv.2018.01.267] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 01/25/2018] [Accepted: 01/26/2018] [Indexed: 06/08/2023]
Abstract
Cadmium (Cd) contamination in soil is a global environmental pollution issue. Nanohydroxyapatite (NHAP) has been used in soil remediation to immobilize cadmium in contaminated soils. However, the effect of acid rain on the export of cadmium from topsoil and its behavior in deep soil and leachate is unclear. In this study, column experiments and development of parsimonious model were performed to estimate Cd leaching behavior from topsoil and environmental risk of groundwater after 0.5% NHAP remediation. Four leaching events were performed and total Cd, different fractions of Cd determined by sequential extraction procedure and pH were determined for each leaching. The results show that with the export of Cd in topsoil, the total Cd concentration in soil at different depths had the following vertical distributions: 0-5 cm > 5-10 cm > 10-15 cm > 15-20 cm. NHAP treatment increased the soil pH and decreased Cd leaching loss by 56.45% compared to the control, and the results fit the parabolic diffusion model. With sequential extraction it was observed that NHAP application increased the residual fraction of cadmium in soil. After leaching, there was a positive correlation between soil pH and Cd concentration with regards to the exchangeable, reducible, oxidizable and residual Cd fractions. The parabolic diffusion model showed that Cd-contaminated soil with NHAP remediation is harmless to humans after sufficient remediation duration, whereas the resultant concentrations from the CK treatment could be toxic. The results indicate that nanohydroxyapatite could significantly reduce the bioavailability of cadmium and the environmental risk. However, the release of Ca and P from the dissolution of NHAP should be carefully studied as this will impact the mobilization of Cd or colloid Cd, and high leaching of P may result in P-induced eutrophication risk.
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Affiliation(s)
- Chenchen Zhao
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Shuxia Ren
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Qingqing Zuo
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Shutao Wang
- Agriculture University of Hebei, Baoding 071002, China
| | - Yapeng Zhou
- Agriculture University of Hebei, Baoding 071002, China
| | - Wei Liu
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China.
| | - Shuxuan Liang
- College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
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