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Kaliyaperumal V, Rajasekaran S, Kanniah R, Gopal D, Ayyakannu Sundaram G, Kumar ASK. Synthesis and Evaluation of Gelatin-Chitosan Biofilms Incorporating Zinc Oxide Nanoparticles and 5-Fluorouracil for Cancer Treatment. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3186. [PMID: 38998269 PMCID: PMC11242392 DOI: 10.3390/ma17133186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 06/22/2024] [Accepted: 06/24/2024] [Indexed: 07/14/2024]
Abstract
In this study, a novel multifunctional biofilm was fabricated using a straightforward casting process. The biofilm comprised gelatin, chitosan, 5-fluorouracil (5-FU)-conjugated zinc oxide nanoparticles, and polyvinyl alcohol plasticized with glycerol. The 5-FU-conjugated nanoparticles were synthesized via a single-step co-precipitation process, offering a unique approach. Characterization confirmed successful drug conjugation, revealing bar-shaped nanoparticles with sizes ranging from 90 to 100 nm. Drug release kinetics followed the Korsmeyer-Peppas model, indicating controlled release behavior. Maximum swelling ratio studies of the gelatin-chitosan film showed pH-dependent characteristics, highlighting its versatility. Comprehensive analysis using SEM, FT-IR, Raman, and EDX spectra confirmed the presence of gelatin, chitosan, and 5-FU/ZnO nanoparticles within the biofilms. These biofilms exhibited non-cytotoxicity to human fibroblasts and significant anticancer activity against skin cancer cells, demonstrating their potential for biomedical applications. This versatility positions the 5-FU/ZnO-loaded sheets as promising candidates for localized topical patches in skin and oral cancer treatment, underscoring their practicality and adaptability for therapeutic applications.
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Affiliation(s)
- Viswanathan Kaliyaperumal
- Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai 602105, India; (S.R.); (R.K.)
| | - Srilekha Rajasekaran
- Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai 602105, India; (S.R.); (R.K.)
| | - Rajkumar Kanniah
- Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai 602105, India; (S.R.); (R.K.)
| | - Dhinakaraj Gopal
- Translational Research Platform for Veterinary Biologicals, Centre for Animal Health Studies (CAHS), Tamil Nadu Veterinary and Animal Sciences University (TANUVAS), Chennai 600051, India;
- Department of Biotechnology, Madras Veterinary College, Tamil Nadu Veterinary and Animal Sciences University (TANUVAS), Chennai 600051, India
| | - Ganeshraja Ayyakannu Sundaram
- Department of Research Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Poonamallee High Road, Chennai 600077, India;
| | - Alagarsamy Santhana Krishna Kumar
- Department of Chemistry, National Sun Yat-sen University, No. 70, Lien-Hai Road, Gushan District, Kaohsiung 80424, Taiwan
- Faculty of Geology, Geophysics and Environmental Protection, AGH University of Krakow, Al. Mickiewicza 30, 30-059 Krakow, Poland
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Fakhry H, Ghoniem AA, Al-Otibi FO, Helmy YA, El Hersh MS, Elattar KM, Saber WIA, Elsayed A. A Comparative Study of Cr(VI) Sorption by Aureobasidium pullulans AKW Biomass and Its Extracellular Melanin: Complementary Modeling with Equilibrium Isotherms, Kinetic Studies, and Decision Tree Modeling. Polymers (Basel) 2023; 15:3754. [PMID: 37765609 PMCID: PMC10537747 DOI: 10.3390/polym15183754] [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: 08/06/2023] [Revised: 08/27/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023] Open
Abstract
Melanin as a natural polymer is found in all living organisms, and plays an important role in protecting the body from harmful UV rays from the sun. The efficiency of fungal biomass (Aureobasidium pullulans) and its extracellular melanin as Cr(VI) biosorbents was comparatively considered. The efficiency of Cr(VI) biosorption by the two sorbents used was augmented up to 240 min. The maximum sorption capacities were 485.747 (fungus biomass) and 595.974 (melanin) mg/g. The practical data were merely fitted to both Langmuir and Freundlich isotherms. The kinetics of the biosorption process obeyed the pseudo-first-order. Melanin was superior in Cr(VI) sorption than fungal biomass. Furthermore, four independent variables (contact time, initial concentration of Cr(VI), biosorbent dosage, and pH,) were modeled by the two decision trees (DTs). Conversely, to equilibrium isotherms and kinetic studies, DT of fungal biomass had lower errors compared to DT of melanin. Lately, the DTs improved the efficacy of the Cr(VI) removal process, thus introducing complementary and alternative solutions to equilibrium isotherms and kinetic studies. The Cr(VI) biosorption onto the biosorbents was confirmed and elucidated through FTIR, SEM, and EDX investigations. Conclusively, this is the first report study attaining the biosorption of Cr(VI) by biomass of A. pullulans and its extracellular melanin among equilibrium isotherms, kinetic study, and algorithmic decision tree modeling.
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Affiliation(s)
- Hala Fakhry
- National Institute of Oceanography and Fisheries (NIOF), Cairo 11865, Egypt
- Department of Aquatic Environmental Science, Faculty of Fish Resources, Suez University, Suez 43518, Egypt
| | - Abeer A. Ghoniem
- Microbial Activity Unit, Department of Microbiology, Soils, Water and Environment Research Institute, Agricultural Research Center, Giza 12619, Egypt; (A.A.G.); (M.S.E.H.)
| | - Fatimah O. Al-Otibi
- Botany and Microbiology Department, Faculty of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Yosra A. Helmy
- Department of Veterinary Science, Martin-Gatton College of Agriculture, Food, and Environment, University of Kentucky, Lexington, KY 40546, USA;
| | - Mohammed S. El Hersh
- Microbial Activity Unit, Department of Microbiology, Soils, Water and Environment Research Institute, Agricultural Research Center, Giza 12619, Egypt; (A.A.G.); (M.S.E.H.)
| | - Khaled M. Elattar
- Unit of Genetic Engineering and Biotechnology, Faculty of Science, Mansoura University, Mansoura 35516, Egypt;
| | - WesamEldin I. A. Saber
- Microbial Activity Unit, Department of Microbiology, Soils, Water and Environment Research Institute, Agricultural Research Center, Giza 12619, Egypt; (A.A.G.); (M.S.E.H.)
| | - Ashraf Elsayed
- Botany Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt;
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Akin Sahbaz D. Enhanced Adsorption Performance Cross-Linked Chitosan/ Citrus reticulata Peel Waste Composites as Low-Cost and Green Bio-Adsorbents: Kinetic, Equilibrium Isotherm, and Thermodynamic Studies. Polymers (Basel) 2023; 15:3246. [PMID: 37571140 PMCID: PMC10422377 DOI: 10.3390/polym15153246] [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: 07/11/2023] [Revised: 07/25/2023] [Accepted: 07/28/2023] [Indexed: 08/13/2023] Open
Abstract
This study revealed the synthesis of cross-linked chitosan/Citrus reticulata peel waste (C/CRPW) composites that could be used as low-cost and green bio-adsorbents for the removal of Congo red (CR) dye from aqueous solutions. C/CRPW composites containing different amounts of Citrus reticulata peel waste (CRPW) and chitosan were prepared and cross-linked with glutaraldehyde. The composites were characterized by FESEM, EDS, FTIR, XRD, BET, and zeta potential measurements. The C/CRPW composites as a new type of bio-adsorbents displayed superior adsorption capability toward anionic CR molecules, and the adsorption capacities increased with the incorporation of CRPW. Effects of different ambient conditions, such as contact time, pH, adsorbent dosage, initial adsorbate concentration, and temperature, were fully studied. The conditions which obtained 43.57 mg/g of the highest adsorption capacity were conducted at pH 4 with an initial concentration of 100 mg/L, adsorbent dosage of 2.0 g/L, and contact time of 24 h at 328 K. The adsorption data was found to follow the pseudo-second-order kinetic model and the Freundlich isotherm model. According to the findings of this investigation, it was observed that the C/CRWP composites could be used as adsorbents due to their advantages, including the simple preparation process, being environmentally friendly, renewable, efficient, and low-cost.
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Affiliation(s)
- Deniz Akin Sahbaz
- Department of Chemical Engineering, Faculty of Engineering, Pamukkale University, Denizli 20070, Turkey
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4
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Negarestani M, Tavassoli S, Reisi S, Beigi N, Mollahosseini A, Hosseinzadeh M, Kheradmand A. Preparation of sisal fiber/polyaniline/bio-surfactant rhamnolipid-layered double hydroxide nanocomposite for water decolorization: kinetic, equilibrium, and thermodynamic studies. Sci Rep 2023; 13:11341. [PMID: 37443396 DOI: 10.1038/s41598-023-38511-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 07/09/2023] [Indexed: 07/15/2023] Open
Abstract
Sisal fiber is a potent economical biomaterial for designing composites because of its low density, high specific strength, no toxic effects, and renewability. The present study utilized sisal fiber as a starting material and subjected it to modification to produce a sisal fiber/polyaniline/bio-surfactant rhamnolipid-layered double hydroxide nanocomposite material denoted as SF@PANI@LDH@RL. The composite was evaluated for its efficacy in removing reactive orange 16 (RO16) and methylene blue (MB) from aqueous solutions. The synthesized adsorbent was characterized by FTIR, XRD, and SEM-EDS techniques; these analyses indicated the successful modification of the sisal fiber. The primary factors, including contact time, adsorbent dosage, dye concentration, temperature, and pH, were optimized for achieving the most excellent adsorption efficiency. On the one hand, methylene blue removal is enhanced in the basic solution (pH = 10). On the other hand, reactive orange 16 adsorption was favored in the acidic solution (pH = 3). The highest adsorption capacities for methylene blue and reactive orange 16 were 24.813 and 23.981 mg/g at 318 K, respectively. The Temkin isotherm model, which proves the adsorption procedure of methylene blue and reactive orange 16 could be regarded as a chemisorption procedure, supplies the most suitable explanation for the adsorption of methylene blue (R2 = 0.983) and reactive orange 16 (R2 = 0.996). Furthermore, Elovich is the best-fitting kinetic model for both dyes (R2 = 0.986 for MB and R2 = 0.987 for RO16). The recommended SF@PANI@LDH@RL adsorbent was reused six consecutive times and showed stable adsorption performance. The results demonstrate that SF@PANI@LDH@RL is a perfect adsorbent for eliminating cationic and anionic organic dyes from aqueous media.
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Affiliation(s)
- Mehrdad Negarestani
- Department of Civil and Environmental Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran.
| | - Soheil Tavassoli
- Research Laboratory of Spectroscopy & Micro and Nano Extraction, Department of Chemistry, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran
| | - Saba Reisi
- Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran, Tehran, Iran
| | - Negar Beigi
- Department of Civil and Environmental Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran
| | - Afsaneh Mollahosseini
- Research Laboratory of Spectroscopy & Micro and Nano Extraction, Department of Chemistry, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran.
| | - Majid Hosseinzadeh
- Department of Civil and Environmental Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran
| | - Asiyeh Kheradmand
- Department of Civil and Environmental Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran
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5
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Liu M, Tong S, Tong Z, Guan Y, Sun Y. A strong, biodegradable and transparent cellulose‐based bioplastic stemmed from waste paper. J Appl Polym Sci 2023. [DOI: 10.1002/app.53671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Mengmeng Liu
- Key laboratory of Bio‐based Material Science and Technology of Ministry of Education, School of Materials Science and Engineering Northeast Forestry University Harbin China
| | - Shoudi Tong
- School of Automation Harbin University of Science and Technology Harbin China
| | - Zhihan Tong
- Key laboratory of Bio‐based Material Science and Technology of Ministry of Education, School of Materials Science and Engineering Northeast Forestry University Harbin China
| | - Yuewen Guan
- Key laboratory of Bio‐based Material Science and Technology of Ministry of Education, School of Materials Science and Engineering Northeast Forestry University Harbin China
| | - Yinan Sun
- Key laboratory of Bio‐based Material Science and Technology of Ministry of Education, School of Materials Science and Engineering Northeast Forestry University Harbin China
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Luo X, Zhou X, Peng C, Shao P, Wei F, Li S, Liu T, Yang L, Ding L, Luo X. Bioreduction performance of Cr(VI) by microbial extracellular polymeric substances (EPS) and the overlooked role of tryptophan. JOURNAL OF HAZARDOUS MATERIALS 2022; 433:128822. [PMID: 35390619 DOI: 10.1016/j.jhazmat.2022.128822] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 03/28/2022] [Accepted: 03/29/2022] [Indexed: 06/14/2023]
Abstract
Extracellular polymeric substances (EPS) have exhibited promising advantages in mitigating heavy metal contamination, e.g., single-valent silver (Ag(I)), trivalent gold (Au(III)), and hexavalent chromium (Cr(VI)). However, knowledge of the specific substrate in EPSs that supports Cr(VI) reduction has remained elusive. Here, we isolated a novel Cr(VI)-reducing strain with self-mediating properties in an aquatic environment with various pH values to investigate the mechanisms. After analysis by a batch assay coupled with X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR), and scanning electron microscopy-energy dispersive spectrometry (SEM-EDS) spectroscopic techniques, it was found that Cr(VI) was reduced by the strain and soluble-EPS (S-EPS), and then, organo-trivalent chromium (organo-Cr(III)) was successfully formed. In addition, compared with other components of the strain, the strain and S-EPS completely removed Cr(VI), and the S-EPS exhibited a positive effect on Cr(VI) reduction with a strong monotonic correlation (R2 = 0.999, p = 9.03 × 10-5), indicating that the reduction is an EPS-dependent process. Specifically, the Cr(VI) reduction efficiency was enhanced to 48.85% and 99.4% after EPS and EPS plus tryptophan were added; their respective efficiencies were 3.94 and 8.02 times higher than that of the control assay in which the reductant was depleted. High-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) analysis showed that the tryptophan concentration concomitantly decreased by 61.54%. These findings highlighted the importance of S-EPS and tryptophan and improved our understanding of EPS for Cr(VI) reduction, which might provide a novel strategy for decontaminating targeted heavy metals in future applications.
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Affiliation(s)
- Xianxin Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Xiaoyu Zhou
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Chengyi Peng
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Penghui Shao
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China.
| | - Feng Wei
- Jiangxi Hongcheng Environment Co., Ltd, Nanchang 330038, PR China
| | - Shujing Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Ting Liu
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Liming Yang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Lin Ding
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Xubiao Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, PR China.
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7
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Recent advances in removal techniques of Cr(VI) toxic ion from aqueous solution: A comprehensive review. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115062] [Citation(s) in RCA: 175] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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8
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Liu X, Liao Y, Gao H. Enhancement adsorption of hexavalent chromium from aqueous solution on polypyrrole using ethylamine group. J DISPER SCI TECHNOL 2017. [DOI: 10.1080/01932691.2017.1404917] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Xiaoqin Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, Institute of Applied Chemistry, China West Normal University, Nanchong, China
- Institute of Applied Chemistry, China West Normal University, Nanchong, China
| | - Yunwen Liao
- College of Environmental Science and Engineering, China West Normal University, Nanchong, China
| | - Hejun Gao
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, Institute of Applied Chemistry, China West Normal University, Nanchong, China
- Institute of Applied Chemistry, China West Normal University, Nanchong, China
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Wang SN, Li P, Gu JJ, Liang H, Wu JH. Carboxylate-functionalized sugarcane bagasse as an effective and renewable adsorbent to remove methylene blue. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 2017:300-309. [PMID: 29698244 DOI: 10.2166/wst.2018.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This study prepared a carboxylate-functionalized sugarcane bagasse (CF-SCB) from sugarcane bagasse (SCB) via a simple and low-toxicity chemical modification to enhance its capacity for adsorbing methylene blue (MB) from aqueous solutions. The success of chemical modification was confirmed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), the pore area and porosity, and zeta potential measurement analysis. The adsorption capacity of CF-SCB was investigated at different pHs, ionic strengths, temperatures, contact times and initial dye concentrations. Equilibrium data were best described by the Langmuir isotherm model, and the maximum monolayer adsorption capacity of CF-SCB (296.74 mg g-1) was greatly improved compared with SCB (77.16 mg g-1) at 30 °C. The thermodynamic study indicated that MB adsorption onto CF-SCB was a spontaneous, endothermic and entropy increased process. Adsorption kinetics followed a pseudo-second-order mode, and the adsorption mechanism was based on electrostatic interactions. The reusability study showed that CF-SCB had reasonably good reuse potential. All the results suggested that CF-SCB has high potential to be used as an effective and renewable adsorbent for MB removal from wastewater.
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Affiliation(s)
- Su-Nv Wang
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, State Key Laboratory of Pulp and Paper Engineering, Ministry of Education; School of Environment and Energy, South China University of Technology, Guangzhou 510006, China E-mail:
| | - Ping Li
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, State Key Laboratory of Pulp and Paper Engineering, Ministry of Education; School of Environment and Energy, South China University of Technology, Guangzhou 510006, China E-mail:
| | - Jing-Jing Gu
- Water Purification Institute of Logistics Department of Guangzhou Military Region, Guangzhou 510500, China
| | - Hao Liang
- Water Purification Institute of Logistics Department of Guangzhou Military Region, Guangzhou 510500, China
| | - Jin-Hua Wu
- The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, State Key Laboratory of Pulp and Paper Engineering, Ministry of Education; School of Environment and Energy, South China University of Technology, Guangzhou 510006, China E-mail:
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10
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Kalidhasan S, Santhana Krishna Kumar A, Rajesh V, Rajesh N. The journey traversed in the remediation of hexavalent chromium and the road ahead toward greener alternatives—A perspective. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.03.004] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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11
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Adsorptive features of poli(acrylic acid-co-hydroxyapatite) composite for $$ {{\text{UO}}_{ 2}}^{{ 2 { + }}} $$ UO 2 2 +. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-4288-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Qiu B, Guo J, Zhang X, Sun D, Gu H, Wang Q, Wang H, Wang X, Zhang X, Weeks BL, Guo Z, Wei S. Polyethylenimine facilitated ethyl cellulose for hexavalent chromium removal with a wide pH range. ACS APPLIED MATERIALS & INTERFACES 2014; 6:19816-24. [PMID: 25252106 DOI: 10.1021/am505170j] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Ethyl cellulose (EC) composites modified with 20.0 wt % polyethylenimine (PEI) (PEI/ECs) demonstrated effective hexavalent chromium, [Cr(VI)], removal from solutions with a wide pH range. For example, 4.0 mg/L Cr(VI) solution with a pH below 3.0 was completely purified by 3.0 g/L PEI/ECs within 5 min, much faster than the as-received EC (2 h) and activated carbon (several hours). These PEI/ECs adsorbents has overcome the low pH limitation of Cr(VI) removal; for example, 4.0 mg/L Cr(VI) solution with a pH of 11.0 was completely purified within 15 min. These adsorbents followed chemical adsorption as revealed from the pseudo-second-order kinetic study. These PEI/ECs following the isotherm Langmuir model have a maximum adsorption capacity of 36.8 mg/g, much higher than pure EC (12 mg/g), tetrabutylammonium-modified celluloses (16.67 mg/g), and magnetic carbon (16 mg/g). The reduction of Cr(VI) to Cr(III) by the oxidation of amine groups and hydroxyl groups of PEI/ECs was verified as the main mechanism for the Cr(VI) removal.
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Affiliation(s)
- Bin Qiu
- Integrated Composites Laboratory (ICL) Dan F Smith Department of Chemical Engineering Lamar University , Beaumont, Texas 77710, United States
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13
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Abatement of Cr (VI) from wastewater using a new adsorbent, cantaloupe peel: Taguchi L16 orthogonal array optimization. KOREAN J CHEM ENG 2014. [DOI: 10.1007/s11814-014-0172-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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14
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Lin Q, Wang Q, Duan Y, Wei X, Wu G, Luo Y, Xie Q. Removal of Cu(II), Cr(III), and Cr(VI) from Aqueous Solution using a Novel Agricultural Waste Adsorbent. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2013.808216] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Preparation and adsorption performance of 5-azacytosine-functionalized hydrothermal carbon for selective solid-phase extraction of uranium. J Colloid Interface Sci 2012; 386:291-9. [DOI: 10.1016/j.jcis.2012.07.070] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 07/20/2012] [Accepted: 07/23/2012] [Indexed: 11/18/2022]
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