1
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Gel properties transition from mono-succinylation to cross-linking of agar by attemperation with succinic anhydride. Food Chem 2022; 381:132164. [DOI: 10.1016/j.foodchem.2022.132164] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 01/04/2022] [Accepted: 01/13/2022] [Indexed: 11/24/2022]
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2
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Characteristics and Risk of Forest Soil Heavy Metal Pollution in Western Guangdong Province, China. FORESTS 2022. [DOI: 10.3390/f13060884] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
West Guangdong is an important ecological barrier in Guangdong province, so understanding the spatial patterns and sources of heavy metal pollution of forest soil in this region is of great significance for ecological protection. In this study, the concentrations of heavy metals (Cd, Pb, Cu, Zn, and Ni) in forest soil were determined. Geostatistics, single-factor pollution index (PI), potential ecological risk index (RI), principal component analysis (PCA), and Pearson’s correlation analysis were used to evaluate and analyze the characteristics of heavy metal pollution of forest soil. The results showed that the average concentration did not exceed the critical value. Cd, Pb, and Cu were enriched in southwest Xinxing County, while Zn and Ni were enriched in most areas of the Yunan and Yuncheng districts. Two groups of heavy metals from different sources were identified by PCA and a correlation analysis. Cd, Pb, and Cu in their respective enrichment areas were mainly from marble and cement production, whereas Zn and Ni were primarily from transportation and chemical fertilizer. Most of the study area was safe or slightly polluted while the heavy metal-enriched areas were moderately to severely polluted. The potential ecological risk was at a lower level in the study area but moderate in southwest Xinxing County. In summary, human factors impact the spatial patterns and ecological risks of heavy metals in forest soil. This study provides a scientific basis for forest soil pollution control and ecological protection.
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3
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Ye S, Zhang Y, Chen J, Chen F, Weng H, Xiao Q, Xiao A. Synthesis and properties of maleic anhydride-modified agar with reversibly controlled gel strength. Int J Biol Macromol 2022; 201:364-377. [PMID: 34998880 DOI: 10.1016/j.ijbiomac.2021.12.096] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 11/26/2022]
Abstract
Agar is modified by chemical methods to improve its functional properties and meet the increasing demand of the market. Some of the functional properties of agar are improved after chemical modification, while other properties are reduced, especially gel strength. This study aimed to comprehensively improve the functional properties of agar through acylation and crosslinking by reacting with maleic anhydride. 13C NMR indicated the maleylation reaction was preferred at the C2 hydroxyl group of D-galactose, and the crosslinking reactions occurred at the C2 and C6 hydroxyl groups of D-galactose in different agar chains. Interestingly, the maleylated agar monoester had higher gel transparency (1.5%, w/v) of up to 76% than the native agar (58%). However, it showed a significant decrease in gel strength from 783 g/cm2 to 403 g/cm2, while crosslinking endowed agar with higher gel strength (845 g/cm2) and gel transparency (78.4%). The high transparency of the modified agar plate made colony observation and colony counting easy. Maleylation of agar further enhanced the freeze-thaw stability of agar gel (24.8%, 7th freeze-thaw cycles). Overall, the maleylated agar possessed superior functional properties, and it could be used as food, bacteriological, and biotechnological agar.
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Affiliation(s)
- Siying Ye
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, PR China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, PR China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, PR China
| | - Yonghui Zhang
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, PR China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, PR China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, PR China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Jun Chen
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, PR China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, PR China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, PR China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Fuquan Chen
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, PR China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, PR China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, PR China
| | - Huifen Weng
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, PR China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, PR China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, PR China
| | - Qiong Xiao
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, PR China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, PR China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, PR China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China.
| | - Anfeng Xiao
- College of Food and Biological Engineering, Jimei University, Xiamen 361021, PR China; National R&D Center for Red Alga Processing Technology, Xiamen 361021, PR China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen 361021, PR China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China.
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Zannen S, Halimi MT, Hassen MB, Abualsauod EH, Othman AM. Development of a Multifunctional Wet Laid Nonwoven from Marine Waste Posidonia oceanica Technical Fiber and CMC Binder. Polymers (Basel) 2022; 14:polym14050865. [PMID: 35267688 PMCID: PMC8912526 DOI: 10.3390/polym14050865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 02/16/2022] [Accepted: 02/17/2022] [Indexed: 12/04/2022] Open
Abstract
A Posidonia oceanica waste marine plant was used to produce a wet-laid nonwoven web for multifunction applications. To study the effect of some parameters related to the web characteristics (sheet weight, binder ratio, and pulp ratio) on the mechanical and physical properties of the web, we used a Box-Behnken design plan with three levels. The diagram of the superposed contours graphic method was used to find the optimum parameters of the process for the application of the Posidonia nonwoven fiber on an insulation field. With the measurement of the thermal conductivity properties using the box method, the results demonstrated that the nonwoven fiber from Posidonia oceanica marine waste had good insulation properties in comparison with other classical natural fibers (hemp, flax) used in the field of insulation with the big advantage of being a natural product.
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Affiliation(s)
- Saoussen Zannen
- Laboratory of Textile Engineering, BP 68 Ksar Hellal, University of Monastir, ISET Ksar Hellal, Hadj Ali Soua, Ksar Hellal 5070, Tunisia;
| | - Mohamed Taher Halimi
- Department of Administrative Sciences, Applied College, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia;
| | - Mohamed Ben Hassen
- Laboratory of Textile Engineering, BP 68 Ksar Hellal, University of Monastir, ISET Ksar Hellal, Hadj Ali Soua, Ksar Hellal 5070, Tunisia;
- Department of Industrial Engineering, College of Engineering, Taibah University, Madina 41411, Saudi Arabia
- Correspondence: (M.B.H.); (E.H.A.)
| | - Emad Hashim Abualsauod
- Department of Industrial Engineering, College of Engineering, Taibah University, Madina 41411, Saudi Arabia
- Correspondence: (M.B.H.); (E.H.A.)
| | - Asem Majed Othman
- Department of Industrial and Systems Engineering, College of Engineering, University of Jeddah, Jeddah 21959, Saudi Arabia;
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5
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Recyclable cascading of arsenic phytoremediation and lead removal coupled with high bioethanol production using desirable rice straws. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.107950] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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6
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Elmorsi RR, El-Wakeel ST, Shehab El-Dein WA, Lotfy HR, Rashwan WE, Nagah M, Shaaban SA, Sayed Ahmed SA, El-Sherif IY, Abou-El-Sherbini KS. Adsorption of Methylene Blue and Pb 2+ by using acid-activated Posidonia oceanica waste. Sci Rep 2019; 9:3356. [PMID: 30833622 PMCID: PMC6399213 DOI: 10.1038/s41598-019-39945-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 02/04/2019] [Indexed: 12/01/2022] Open
Abstract
Dead leaves of seagrass Posidonia oceanica were activated by using one mol L-1 acetic acid and used as an eco-adsorbent for the removal of methylene blue (MB) and Pb2+ from aqueous solutions. The seagrass was characterized by chemical and physical measurements that confirmed the acid-activation of seagrass. The favourable conditions for MB and Pb2+ adsorption onto the activated seagrass (SGa) were determined to be a pH range of 2-12 and ≥6, an adsorbent dosage of 3.0 and 0.5 g L-1, respectively, and a shaking time of 30 min, which are suitable for a wide range of wastewaters. The equilibrium data were analysed using the Langmuir, Freundlich and Dubinin-Raduskavich-Kaganer (DRK) adsorption isotherm models. The Freundlich and DRK models best describe the adsorption processes of MB and Pb2+, on SGa with capacities of 2681.9 and 631.13 mg g-1, respectively. The adsorption isotherm fitting and thermodynamic studies suggest that the adsorption mechanism of MB may combine electrostatic and physical multilayer adsorption processes, in which MB may be present as monomers as well as dimers and trimers which were confirmed from UV spectroscopy whereas Pb2+ is chemically adsorbed onto SGa. The pseudo-2nd-order kinetic model was utilized to investigate the kinetics of adsorption processes. The removal process was successfully applied for MB-spiked brackish waste water from Manzala Lake, Egypt, with removal efficiencies of 91.5-99.9%.
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Affiliation(s)
- Randa R Elmorsi
- Marine Chemistry Lab., National Institute of Oceanography and Fisheries, Suez branch, Adabiyah-Suez road, Attaqa district, Suez, Egypt
| | - Shaimaa T El-Wakeel
- Department of Water Research, National Research Centre, 33 El Bohouth st. (former Eltahrir st.), P.O. 12622, Dokki, Giza, Egypt
| | - Waleed A Shehab El-Dein
- Department of Mathematics & Engineering Physics, Faculty of Engineering, Mansoura University, El-Mansoura, Egypt
| | - Hesham R Lotfy
- Basic Sciences Department, Faculty of Engineering, Delta University for Science and Technology, Coastal High Way, Gamasa, Al-Dakahlia, Egypt.
| | - Wafaa E Rashwan
- Department of Physical Chemistry, National Research Centre, 33 El Bohouth st. (former Eltahrir st.), P.O. 12622, Dokki, Giza, Egypt
| | - Mohammed Nagah
- Department of Microbial Chemistry, National Research Centre, 33 El Bohouth st. (former Eltahrir st.), P.O. 12622, Dokki, Giza, Egypt
| | - Seham A Shaaban
- Department of Catalysis, Petroleum Refining Division, Egyptian Petroleum Research Institute, Cairo, Egypt
| | - Sohair A Sayed Ahmed
- Department of Physical Chemistry, National Research Centre, 33 El Bohouth st. (former Eltahrir st.), P.O. 12622, Dokki, Giza, Egypt
| | - Iman Y El-Sherif
- Department of Water Research, National Research Centre, 33 El Bohouth st. (former Eltahrir st.), P.O. 12622, Dokki, Giza, Egypt
| | - Khaled S Abou-El-Sherbini
- Department of Inorganic Chemistry, National Research Centre, 33 El Bohouth st. (former Eltahrir st.), P.O. 12622, Dokki, Giza, Egypt.
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7
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Ashrafi M, Borzuie H, Bagherian G, Chamjangali MA, Nikoofard H. Artificial neural network and multiple linear regression for modeling sorption of Pb2+ ions from aqueous solutions onto modified walnut shell. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1577437] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Motahare Ashrafi
- College of Chemistry, Shahrood University of Technology, Shahrood, Iran
| | - Hadis Borzuie
- College of Chemistry, Shahrood University of Technology, Shahrood, Iran
| | | | | | - Hossein Nikoofard
- College of Chemistry, Shahrood University of Technology, Shahrood, Iran
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8
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Zhang X, Wang X, Chen Z. A Novel Nanocomposite as an Efficient Adsorbent for the Rapid Adsorption of Ni(II) from Aqueous Solution. MATERIALS 2017; 10:ma10101124. [PMID: 28937606 PMCID: PMC5666930 DOI: 10.3390/ma10101124] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 09/18/2017] [Accepted: 09/21/2017] [Indexed: 12/07/2022]
Abstract
A sulfhydryl-lignocellulose/montmorillonite (SLT) nanocomposite was prepared using a chemical intercalation reaction. The SLT nanocomposite was characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Transmission Electron Microscopy (TEM), the results demonstrated that an intercalated-exfoliated nanostructure was formed in the SLT nanocomposite. Batch experiments were conducted to optimize parameters such as SLT nanocomposite dosage, the initial concentration of Ni(II), solution pH, temperature, and time. The results indicated that the attractive adsorption capacity reached 1134.08 mg/g with 0.05 g of SLT at an initial concentration of Ni(II) of 700 mg/L, solution pH of 5.5, adsorption temperature of 50 °C, and adsorption time of 40 min, meanwhile, the Ni(II) adsorption capacity significantly decreased with the increase in ionic strength. The pseudo-second order kinetic model could describe the whole adsorption process well, and the isotherm adsorption equilibrium conformed to the Freundlich model. The adsorption mechanism of SLT was also discussed by means of FTIR and Energy-Dispersive X-Ray (EDX). Dramatically, the introduction of sulfhydryl achieves the increased activated functional groups content of SLT nanocomposite, leading to remarkably higher adsorption amount on Ni(II). The desorption capacity of SLT was dependent on parameters such as HNO3 concentration, desorption temperature, and ultrasonic desorption time. The satisfactory desorption capacity and desorption efficiency of 458.21 mg/g and 40.40% were obtained at an HNO3 concentration, desorption temperature, and ultrasonic desorption time of 0.4 mol/L, 40 °C, and 30 min, respectively. The regeneration studies showed that the adsorption capacity of SLT was consistent for four cycles without any appreciable loss and confirmed that the SLT was reusable. Owing to such outstanding features, the novel SLT nanocomposite proved the great potential in adsorption for Ni(II) removal from aqueous solution, and exhibited an extremely significant amount of Ni(II), compared to pristine lignocellulose/montmorillonite and the conventional spent adsorbents.
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Affiliation(s)
- Xiaotao Zhang
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Ximing Wang
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Zhangjing Chen
- Department of Sustainable Biomaterials, Virginia Tech University, Blacksburg, VA 24061, USA.
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9
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Simultaneous Removal of Hg(II) and Phenol Using Functionalized Activated Carbon Derived from Areca Nut Waste. METALS 2017. [DOI: 10.3390/met7070248] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Xin PP, Huang YB, Hse CY, Cheng HN, Huang C, Pan H. Modification of Cellulose with Succinic Anhydride in TBAA/DMSO Mixed Solvent under Catalyst-Free Conditions. MATERIALS 2017; 10:ma10050526. [PMID: 28772885 PMCID: PMC5459046 DOI: 10.3390/ma10050526] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 05/05/2017] [Accepted: 05/09/2017] [Indexed: 11/16/2022]
Abstract
Homogeneous modification of cellulose with succinic anhydride was performed using tetrabutylammonium acetate (TBAA)/dimethyl sulfoxide (DMSO) mixed solvent. The molar ratio of succinic anhydride (SA) to free hydroxyl groups in the anhydroglucose units (AGU), TBAA dosage, reaction temperature, and reaction time were investigated. The highest degree of substitution (DS) value of 1.191 was obtained in a 10 wt% TBAA/DMSO mixed solvent at 60 °C for 60 min, and the molar ratio of SA/AGU was 6/1. The molar ratio of SA/AGU and the TBAA dosage showed a significant influence on the reaction. The succinoylated cellulose was characterized by ATR-FTIR, TGA, XRD, solid state CP/MAS 13C NMR spectroscopy (CP/MAS 13C NMR), and SEM. Moreover, the modified cellulose was applied for the adsorption of Cu2+ and Cd2+, and both the DS values of modified cellulose and pH of the heavy metal ion solutions affected the adsorption capacity of succinylated cellulose. The highest capacity for Cu2+ and Cd2+ adsorption was 42.05 mg/g and 49.0 mg/g, respectively.
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Affiliation(s)
- Ping-Ping Xin
- College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, China.
| | - Yao-Bing Huang
- College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, China.
| | - Chung-Yun Hse
- Southern Research Station, USDA Forest Service, Pineville, LA, 71360, USA.
| | - Huai N Cheng
- USDA Agricultural Research Service, Southern Regional Research Center, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, USA.
| | - Chaobo Huang
- College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, China.
| | - Hui Pan
- College of Chemical Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, China.
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11
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Ferchichi M, Dhaouadi H. Sorption of paracetamol onto biomaterials. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 74:287-294. [PMID: 27387007 DOI: 10.2166/wst.2016.218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Pharmaceutical residues released into the environment are posing more and more public health problems. It is worthwhile to study the retention of pharmaceuticals residues by adsorption on solid supports. Batch sorption experiments are intended to identify the adsorption isotherms of the pharmaceutically active ingredient on the biomaterials. The results obtained in this study have shown that the retention possibilities of these compounds by bio-adsorbents (clay and sand) are not significant. The negligible sorption for these media is explained by the low hydrophobicity of paracetamol (Log K(ow) = 0.46). The retention of paracetamol on the dehydrated sewage sludge and on Posidonia oceanica showed a relatively significant adsorption with a maximal quantity of 0.956 mg g(-1) and 1.638 mg g(-1) for the dehydrate sludge and P. oceanica, respectively. On the other hand, the study of paracetamol retention on the powdered activated carbon showed a high adsorption capacity of about 515.27 mg g(-1). Isotherm data show a good fit with Langmuir's model. An infrared analysis is carried out. It shows identical bands before and after adsorption, with some modifications.
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Affiliation(s)
- Maroua Ferchichi
- Université de Monastir, Faculté des Sciences, UR13ES63 Chimie Appliquée & Environnement, Monastir 5000, Tunisia E-mail:
| | - Hatem Dhaouadi
- Université de Monastir, Faculté des Sciences, UR13ES63 Chimie Appliquée & Environnement, Monastir 5000, Tunisia E-mail:
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12
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Ben Douissa N, Dridi-Dhaouadi S, Mhenni MF. Spectrophotometric investigation of the interactions between cationic (C.I. Basic Blue 9) and anionic (C.I. Acid Blue 25) dyes in adsorption onto extracted cellulose from Posidonia oceanic in single and binary system. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 73:2211-2221. [PMID: 27148723 DOI: 10.2166/wst.2016.068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Extracted cellulose from Posidonia oceanica was used as an adsorbent for removal of a cationic (Basic blue 9, BB) and anionic textile dye (Acid blue 25, AB) from aqueous solution in single dye system. Characterization of the extracted cellulose and extracted cellulose-dye systems were performed using several techniques such as Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, zeta potential and Boehm acid-base titration method. Adsorption tests showed that the extracted cellulose presented higher adsorption of BB than AB in single dye system, revealing that electrostatic interactions are responsible, in the first instance, for the dye-adsorbent interaction. In single dye systems, the extracted cellulose presented the maximum adsorption capacities of BB and AB at 0.955 mmol.g(-1) and 0.370 mmol.g(-1), respectively. Adsorption experiments of AB dye on extracted cellulose saturated by BB dye exhibited the release of the latter dye from the sorbent which lead to dye-dye interaction in aqueous solution due to electrostatic attraction between both species. Interaction of BB and AB dyes were investigated using spectrophotometric analysis and results demonstrated the formation of a molecular complex detected at wavelengths 510 and 705 nm when anionic (AB) and cationic (BB) dye were taken in equimolar proportions. The adsorption isotherm of AB, taking into account the dye-dye interaction was investigated and showed that BB dye was released proportionately by AB equilibrium concentration. It was also observed that AB adsorption is widely enhanced when the formation of the molecular complex is disadvantaged.
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Affiliation(s)
- Najoua Ben Douissa
- Research Unit of Applied Chemistry & Environment, Department of Chemistry, Faculty of Sciences, University of Monastir, 5019 Tunisia E-mail:
| | - Sonia Dridi-Dhaouadi
- Research Unit of Applied Chemistry & Environment, Department of Chemistry, Faculty of Sciences, University of Monastir, 5019 Tunisia E-mail:
| | - Mohamed Farouk Mhenni
- Research Unit of Applied Chemistry & Environment, Department of Chemistry, Faculty of Sciences, University of Monastir, 5019 Tunisia E-mail:
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13
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Pourjavadi A, Tehrani ZM, Salimi H, Banazadeh A, Abedini N. Hydrogel nanocomposite based on chitosan-g-acrylic acid and modified nanosilica with high adsorption capacity for heavy metal ion removal. IRANIAN POLYMER JOURNAL 2015. [DOI: 10.1007/s13726-015-0360-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Removal of cadmium(II) from aqueous solutions by chemically modified maize straw. Carbohydr Polym 2014; 115:177-85. [PMID: 25439883 DOI: 10.1016/j.carbpol.2014.08.041] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 08/05/2014] [Accepted: 08/09/2014] [Indexed: 11/23/2022]
Abstract
A new regenerable adsorbent was successfully prepared by modifying maize straw (MS) with succinic anhydride in xylene. The succinylated-maize straw (S-MS) was characterized by FTIR, solid-state MAS (13)C NMR spectroscopy, SEM-EDX and point of zero charge analysis. NaS-MS was successfully obtained after deprotonating the carboxylic acid groups of S-MS by Na2CO3 solution. Batch experiments were carried out with NaS-MS for the removal of Cd(II). The effects of pH, adsorbent dosage, contact time, initial concentration and temperature were investigated. The experimental data were best described by a pseudo-second-order kinetics and Langmuir adsorption models. Thermodynamic parameters (ΔG, ΔH, and ΔS) were also calculated from data obtained from experiments performed to study the effect of temperatures. NaS-MS could be regenerated at least five times in saturated NaCl solution without any loss. Furthermore, ∼97% of adsorbed Cd(II) ions could be recovered as the metal oxide. Finally, the adsorption mechanism of NaS-MS was discussed.
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15
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Khalfaoui M, Nakhli A, Aguir C, Omri A, M'henni MF, Ben Lamine A. Statistical thermodynamics of adsorption of dye DR75 onto natural materials and its modifications: double-layer model with two adsorption energies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:3134-44. [PMID: 24203257 DOI: 10.1007/s11356-013-2263-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 10/21/2013] [Indexed: 05/18/2023]
Abstract
In this article, adsorption modelling was presented to describe the sorption of textile dye, Direct Red 75 (DR75), from coloured wastewater onto the natural and modified adsorbent, Posidonia oceanica. The formulation of the double-layer model with two energy levels was based on statistical physics and theoretical considerations. Thanks to the grand canonical ensemble in statistical physics some physico-chemical parameters related to the adsorption process were introduced in the analytical model expression. Fitting results show that the dye molecules are adsorbed in parallel position to the adsorbent surface. The magnitudes of the calculated adsorption energies show that the DR75 dye is physisorbed onto Posidonia. Both Van der Waals and hydrogen interactions are implicated in the adsorption process. Despite its simplicity, the model fits a wide range of experimental data, thereby supporting the underlying data that the grafted groups facilitate the parallel anchorage of the anionic dye molecule. Thermodynamic parameters, such as adsorption energy, entropy, Gibbs free adsorption energy and internal energy were calculated according to the double-layer model. Results suggested that the DR75 adsorption onto Posidonia was a spontaneous and exothermic process.
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Affiliation(s)
- M Khalfaoui
- Quantum Physics Laboratory, Faculty of Sciences of Monastir, University of Monastir, Monastir, 5000, Tunisia,
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16
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Solubility of succinic anhydride in different pure solvents and binary solvent mixtures with the temperature range from 278.15 to 333.15K. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2012.12.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Payne KC, Jackson CD, Aizpurua CE, Rojas OJ, Hubbe MA. Oil spills abatement: factors affecting oil uptake by cellulosic fibers. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:7725-7730. [PMID: 22724888 DOI: 10.1021/es3015524] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Wood-derived cellulosic fibers prepared in different ways were successfully employed to absorb simulated crude oil, demonstrating their possible use as absorbents in the case of oil spills. When dry fibers were used, the highest sorption capacity (six parts of oil per unit mass of fiber) was shown by bleached softwood kraft fibers, compared to hardwood bleached kraft and softwood chemithermomechanical pulp(CTMP) fibers. Increased refining of CTMP fibers decreased their oil uptake capacity. When the fibers were soaked in water before exposure to the oil, the ability of the unmodified kraft fibers to sorb oil was markedly reduced, whereas the wet CTMP fibers were generally more effective than the wet kraft fibers. Predeposition of lignin onto the surfaces of the bleached kraft fibers improved their ability to take up oil when wet. Superior ability to sorb oil in the wet state was achieved by pretreating the kraft fibers with a hydrophobic sizing agent, alkenylsuccinic anhydride (ASA). Contact angle tests on a model cellulose surface showed that some of the sorption results onto wetted fibers could be attributed to the more hydrophobic nature of the fibers after treatment with either lignin or ASA.
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Affiliation(s)
- Katharine C Payne
- Department of Forest Biomaterials, North Carolina State University, Raleigh, NC, USA
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Kim YH, Kil HS, Kang KC, Choi SN, Rhee SW. Analysis of adsorption behavior of lead ion on to surface modified AlPO 4materials. ANALYTICAL SCIENCE AND TECHNOLOGY 2011. [DOI: 10.5806/ast.2011.24.4.275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Dridi-Dhaouadi S, Ben Douissa-Lazreg N, M'Henni MF. Removal of lead and yellow 44 acid dye in single and binary component systems by raw Posidonia oceanica and the cellulose extracted from the raw biomass. ENVIRONMENTAL TECHNOLOGY 2011; 32:325-340. [PMID: 21780701 DOI: 10.1080/09593330.2010.499545] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This study examined the sorption behaviour of Pb(II) and C.I. Acid Yellow 44 on Posidonia oceanica, an abundant Mediterranean biomass. A comparison with sorption onto cellulose extracted from the raw material was carried out to identify those site characteristics that play a predominant role in the adsorption of both dye and metal ions. Kinetic and equilibrium studies were performed for single and binary component systems, and the experimental data were analyzed by a non-linear method. The pseudo second-order kinetic model was successfully applied for both dye and metal retention onto sorbents in single and binary systems. Both sorbents were found to be more effective for lead than for Yellow 44 removal. However, lead sorption was more effective on raw P. oceanica suggesting that the metal ions are sorbed into the whole available biomass sites (cellulose and lignin). An opposite behaviour was reported for Yellow 44 sorption, which was found to be more effective on the extracted cellulose than raw P. oceanica. This finding proves that the only available sites for dye sorption are the cellulosic ones. The binary component experimental studies indicated competition between dye and lead for the available sites of raw P. oceanica. However, this competition was found to be less prevalent for sorption by cellulose extracted from raw P. oceanica suggesting that, in binary component systems, the cellulosic sites are equally available for both pollutants, the only limiting parameter being the size of the molecular sorbate. Langmuir and Freundlich isotherms were used to fit the experimental data using the non-linear method for parameter determination.
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