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Mandlimath TR, Kumar SP. Effect of Synthetic Routes on the Catalytic Activity of FePO4 for p-Nitrophenol Reduction. KINETICS AND CATALYSIS 2021. [DOI: 10.1134/s0023158421040078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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2
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Seyedi Z, Amooey AA, Amouei A, Tashakkorian H. Pentachlorophenol removal from aqueous solutions using Montmorillonite modified by Silane & Imidazole: kinetic and isotherm study. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2019; 17:989-999. [PMID: 32030169 PMCID: PMC6985331 DOI: 10.1007/s40201-019-00414-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Removal of pentachlorophenol (PCP) from wastewater containing chlorophenols, due to its toxicity, mutagenic and carcinogenic properties, has been attracted much interests of researchers. METHODS In this research, K10 montmorillonite was modified by silane and imidazole (Im) for increasing the removal percentage of PCP from aqueous solutions. It was characterized by FTIR, XRF, FESEM, EDS, and BET techniques. The influence of different parameters such as initial concentration, contact time, adsorbent dosage, pH, temperature and agitating speed was investigated. RESULTS The maximum removal percentage (95%) were obtained for PCP at pH = 4. The isotherm experimental data for pentachlorophenol was best fitted using the Langmuir model and the kinetic studies were better described by the pseudo-second-order kinetic model. The thermodynamic study indicated that the adsorption of PCP by the adsorbent was feasible, spontaneous and exothermic. CONCLUSION In this study, the modified montmorillonite by silane and imidazole is appropriate and low cost adsorbent for increasing of the removal percentage of PCP from aqueous solutions.
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Affiliation(s)
- Zahra Seyedi
- Department of Chemical Engineering, University of Mazandaran, Babolsar, Iran
| | - Ali Akbar Amooey
- Department of Chemical Engineering, University of Mazandaran, Babolsar, Iran
| | - Abdoliman Amouei
- Environmental Health Research Center (EHRC), Department of Environmental Health, Babol University of Medical Sciences, Babol, Iran
| | - Hamed Tashakkorian
- Cellular and Molecular Biology Research Center, Babol University of Medical Sciences, Babol, Iran
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Catalytic Efficiency of Cu-Supported Pyrophyllite in Heterogeneous Catalytic Oxidation of Phenol. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2019. [DOI: 10.1007/s13369-019-03757-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Neusatz Guilhen S, Rovani S, Pitol Filho L, Alves Fungaro D. Kinetic study of uranium removal from aqueous solutions by macaúba biochar. CHEM ENG COMMUN 2018. [DOI: 10.1080/00986445.2018.1533467] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Sabine Neusatz Guilhen
- Instituto de Pesquisas Energéticas e Nucleares (IPEN - CNEN/SP), Cidade Universitária – CEP, São Paulo, SP, Brazil
| | - Suzimara Rovani
- Instituto de Pesquisas Energéticas e Nucleares (IPEN - CNEN/SP), Cidade Universitária – CEP, São Paulo, SP, Brazil
| | | | - Denise Alves Fungaro
- Instituto de Pesquisas Energéticas e Nucleares (IPEN - CNEN/SP), Cidade Universitária – CEP, São Paulo, SP, Brazil
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Panda L, Rath SS, Rao DS, Nayak BB, Das B, Misra PK. Thorough understanding of the kinetics and mechanism of heavy metal adsorption onto a pyrophyllite mine waste based geopolymer. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.05.016] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Preparation of Amino Functionalized Hydrophobic Zeolite and Its Adsorption Properties for Chromate and Naphthalene. MINERALS 2018. [DOI: 10.3390/min8040145] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Synthesis and Characterization of Zeolite HS Using Natural Pyrophyllite as New Clay Source. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2017. [DOI: 10.1007/s13369-017-2768-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Wei F, Wu B, Zhang J, Zhang W. Modification of abandoned fine blue-coke: optimization study on removal of p-nitrophenol using response surface methodology. RSC Adv 2016. [DOI: 10.1039/c5ra24847g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Abandoned fine blue-coke was modified with a physicochemical method including nitric acid (HNO3) treatment and nitrogen gas (N2) calcination, and used as an adsorbent for p-nitrophenol (PNP) removal.
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Affiliation(s)
- Fengyu Wei
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei 230009
- China
| | - Bo Wu
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei 230009
- China
| | - Jincheng Zhang
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei 230009
- China
| | - Wanting Zhang
- School of Chemistry and Chemical Engineering
- Hefei University of Technology
- Hefei 230009
- China
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Chawla A, Prasad M, Goswami R, Ranshore S, Kulshreshtha A, Kumar Sinha AS. Kinetic model for sorption of divalent heavy metal ions on low cost minerals. KOREAN J CHEM ENG 2015. [DOI: 10.1007/s11814-015-0177-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Zhang J, Zhou Y, Jiang M, Li J, Sheng J. Removal of methylene blue from aqueous solution by adsorption on pyrophyllite. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.05.056] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Tonle IK, Ngameni E, Tchieno FMM, Walcarius A. Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-014-2728-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Su L, Tao Q, He H, Zhu J, Yuan P, Zhu R. Silylation of montmorillonite surfaces: Dependence on solvent nature. J Colloid Interface Sci 2013; 391:16-20. [DOI: 10.1016/j.jcis.2012.08.077] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Revised: 08/06/2012] [Accepted: 08/08/2012] [Indexed: 11/26/2022]
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13
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Bandeira LC, Calefi PS, Ciuffi KJ, de Faria EH, Nassar EJ, Vicente MA, Trujillano R. Preparation of composites of laponite with alginate and alginic acid polysaccharides. POLYM INT 2012. [DOI: 10.1002/pi.4196] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Mitra S, Chandra S, Kundu T, Banerjee R, Pramanik P, Goswami A. Rapid microwave synthesis of fluorescent hydrophobic carbon dots. RSC Adv 2012. [DOI: 10.1039/c2ra21048g] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Sahiner N, Ozay O, Aktas N. Aromatic organic contaminant removal from an aqueous environment by p(4-VP)-based materials. CHEMOSPHERE 2011; 85:832-838. [PMID: 21764103 DOI: 10.1016/j.chemosphere.2011.06.087] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2011] [Revised: 06/20/2011] [Accepted: 06/21/2011] [Indexed: 05/31/2023]
Abstract
p(4-vinylpyridine) (p(4-VP)) hydrogels were prepared in bulk (macro, 5 × 6 mm) and in nanosizes (370 nm) dimensions. The prepared hydrogels were used to remove organic aromatic contaminates such as 4-nitrophenol (4-NP), 2-nitrophenol (2-NP), phenol (Ph) and nitrobenzene (NB) from an aqueous environment. Important parameters affecting the absorption phenomena, such as the initial concentration of the organic species and the absorbent, absorption rate, absorption capacity, pH and the temperature of the medium, were evaluated for both hydrogel sizes. The absorption capacity of bulk and microgels were found to be 4-NP>2-NP>Ph>NB. Furthermore, p(4-VP) microgels were embedded in poly(acrylamide) (p(AAm)) bulk hydrogel as a microgel-hydrogel interpenetrating polymer network and proved to be very practical in overcoming the difficulty of using the microgels in real applications. Moreover, it was demonstrated that separately prepared magnetic ferrite particles inserted inside p(4-VP) microgels during synthesis allowed for trouble-free removal of p(4-VP)-magnetic composite microgels from the aqueous environment by an externally applied magnetic field upon completion of their task.
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Affiliation(s)
- Nurettin Sahiner
- Faculty of Science & Arts, Chemistry Department, Canakkale Onsekiz Mart University, Terzioglu Campus, 17100 Canakkale, Turkey.
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16
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Mahkam M. Synthesis and Characterization of Polymer/Silica Composite for Colon-Specific Drug Delivery. INT J POLYM MATER PO 2011. [DOI: 10.1080/00914037.2010.531814] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Loo YM, Lim PE, Seng CE. Treatment of p-nitrophenol in an adsorbent-supplemented sequencing batch reactor. ENVIRONMENTAL TECHNOLOGY 2010; 31:479-487. [PMID: 20480823 DOI: 10.1080/09593330903514482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The objective of this research was to evaluate the treatment ofp-nitrophenol (PNP) as a sole organic carbon source using a sequencing batch reactor (SBR) with the addition of adsorbent. Two types of adsorbents, namely powdered activated carbon (PAC) and pyrolysed rice husk (PRH) were used in this study. Two identical SBRs, each with a working volume of 10 L, were operated with fill, react, settle, draw and idle periods in the ratio of 2:8:1:0.75:0.25 for a cycle time of 12 h. The results showed that, without the addition of adsorbent, increasing the influent PNP concentration to 200 mg/L resulted in the deterioration of chemical oxygen demand (COD) removal efficiency and PNP removal efficiency in the SBRs. Improvement in the performance of the SBR was observed with the addition of PAC. When the dosage of 1.0 g PAC/cycle was applied, COD removal of 95% and almost complete removal of PNP were achieved at the influent PNP concentration of 300 mg/L. The kinetic study showed that the rates of COD and PNP removal can be described by the first-order kinetics. The enhancement of performance in the PAC-supplemented SBR was postulated to be due to the initial adsorption of PNP by the freshly added and the bioregenerated PAC, thus reducing the inhibition on the microorganisms. The PRH was found to be ineffective because of its relatively low adsorption capacity for PNP, compared with that of PAC.
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Affiliation(s)
- Y M Loo
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
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Colon-specific drug delivery behavior of pH-responsive PMAA/perlite composite. Int J Mol Sci 2010; 11:1546-56. [PMID: 20480034 PMCID: PMC2871130 DOI: 10.3390/ijms11041546] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2009] [Accepted: 04/12/2010] [Indexed: 11/16/2022] Open
Abstract
The preparation, characterization, and in vitro release of 5-aminosalicylic acid (5-ASA) from methacrylic acid (MAA)/perlite composites (APC) prepared via a sol–gel route are reported. The free-radical graft polymerization of methacrylic acid (MAA) onto perlite particles was studied experimentally. The grafting procedure consisted of surface activation with 3-(trimethoxysilyl) propyl methacrylate (TSPA), followed by free-radical graft polymerization of methacrylic acid (MAA) in ethyl acetate with 2,2′-azobisisobutyronitrile (AIBN) initiator. The composition of the composites hybrid materials was determined by FTIR spectroscopy. Equilibrium swelling studies were carried out in enzyme-free simulated gastric and intestinal fluids (SGF and SIF, respectively). The dried composites were immersed in a saturated solution of 5-ASA in water overnight and dried over a period of three days at room temperature and the in vitro release profiles were established separately in both (SGF, pH 1) and (SIF, pH 7.4). The 5-ASA concentration of the solution was measured using a UV-Vis spectrophotometer (205 nm) at different time intervals. The in vitro drug release test revealed that the release rate of 5-ASA in buffer solutions increased with the silica content in the composites; on the contrary, the increase of the content of 3-(trimethoxysilyl)propyl methacrylate (TSPA), a coupling agent, decreased the drug release rate.
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Gwon JG, Lee SY, Doh GH, Kim JH. Characterization of chemically modified wood fibers using FTIR spectroscopy for biocomposites. J Appl Polym Sci 2010. [DOI: 10.1002/app.31746] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Goh CP, Seng CE, Sujari ANA, Lim PE. Performance of sequencing batch biofilm and sequencing batch reactors in simultaneous p-nitrophenol and nitrogen removal. ENVIRONMENTAL TECHNOLOGY 2009; 30:725-736. [PMID: 19705610 DOI: 10.1080/09593330902911689] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The objective of this study is to evaluate the performance of sequencing batch biofilm reactors (SBBRs) and sequencing batch reactor (SBR) in the simultaneous removal of p-nitrophenol (PNP) and ammoniacal nitrogen. SBBRs involved the use of polyurethane sponge cubes and polyethylene rings, respectively, as carrier materials. The results demonstrate that complete removal of PNP was achievable for the SBR and SBBRs up to the PNP concentration of 350 mg/l (loading rate of 0.368 kg/m3 d). At this loading rate, the average ammoniacal nitrogen removal efficiency for the SBR and SBBR (with polyethylene rings) was reduced to 86% and 96%, respectively. However, the SBBR (with polyurethane sponge cubes) still managed to achieve an almost 100% ammoniacal nitrogen removal. Based on the results, the performance of the SBBRs was better than that of SBR in PNP and ammoniacal nitrogen removal. The results of the gas chromatography mass spectroscopy, high-performance liquid chromatography and ultraviolet-visible analyses indicate that complete mineralization of PNP was achieved in all of the reactors.
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Affiliation(s)
- Chin-Ping Goh
- School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
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Gupta N, Prasad M, Singhal N, Kumar V. Modeling the Adsorption Kinetics of Divalent Metal Ions onto Pyrophyllite Using the Integral Method. Ind Eng Chem Res 2009. [DOI: 10.1021/ie800975m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Neelmani Gupta
- Department of Chemical Engineering, Thapar University, Patiala, India, and Environmental Chemistry Division, Advanced Materials and Processes Research Institute (C.S.I.R.), Hoshangabad Road, Bhopal, India
| | - Murari Prasad
- Department of Chemical Engineering, Thapar University, Patiala, India, and Environmental Chemistry Division, Advanced Materials and Processes Research Institute (C.S.I.R.), Hoshangabad Road, Bhopal, India
| | - Nidhi Singhal
- Department of Chemical Engineering, Thapar University, Patiala, India, and Environmental Chemistry Division, Advanced Materials and Processes Research Institute (C.S.I.R.), Hoshangabad Road, Bhopal, India
| | - Vineet Kumar
- Department of Chemical Engineering, Thapar University, Patiala, India, and Environmental Chemistry Division, Advanced Materials and Processes Research Institute (C.S.I.R.), Hoshangabad Road, Bhopal, India
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Demirbaş O, Alkan M, Doğan M, Turhan Y, Namli H, Turan P. Electrokinetic and adsorption properties of sepiolite modified by 3-aminopropyltriethoxysilane. JOURNAL OF HAZARDOUS MATERIALS 2007; 149:650-6. [PMID: 17532563 DOI: 10.1016/j.jhazmat.2007.04.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2006] [Revised: 04/05/2007] [Accepted: 04/06/2007] [Indexed: 05/15/2023]
Abstract
Surface modification of clay minerals has become increasingly important for improving the practical applications of clays such as fillers and adsorbents. An investigation was carried out on the surface modification of sepiolite with aminopropylsilyl groups in 3-aminopropyltriethoxysilane (3-APT). The zeta potential of the modified sepiolite suspensions was measured as a function of initial electrolyte concentration and equilibrium pH using a Zeta Meter 3.0 for modified sepiolite. The utility of the 3-APT-modified sepiolite was investigated as an adsorbent for removal of various heavy metal ions such as Fe, Mn, Co, Zn, Cu, Cd and Ni from aqueous solutions. The effects of various factors on the adsorption, such as pH, ionic strength and temperature of the solution were studied. The results showed that the amount adsorbed increases with solution pH in the pH range of 1.5 and 7.0; indicated that the modified sepiolite adsorbed Fe and Mn ions more than other metal ions such as Co, Zn, Cu, Cd and Ni. It was found that the temperature had an important effect on metal ion adsorption by the modified sepiolite. The adsorption isotherm has been determined and data have been analyzed according to the Langmuir and Freundlich models.
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Affiliation(s)
- Ozkan Demirbaş
- Balikesir University, Faculty of Science and Literature, Department of Chemistry, 10145 Balikesir, Turkey
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Erdemoğlu M. Zeta Potential of Pyrophyllite in Aqueous Solutions of Alkaline and Alkaline Earth Metal Cations and Low‐Molecular‐Weight Organic Anions. J DISPER SCI TECHNOL 2007. [DOI: 10.1080/01932690701341793] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Gücek A, Sener S, Bilgen S, Mazmanci MA. Adsorption and kinetic studies of cationic and anionic dyes on pyrophyllite from aqueous solutions. J Colloid Interface Sci 2005; 286:53-60. [PMID: 15848402 DOI: 10.1016/j.jcis.2005.01.012] [Citation(s) in RCA: 152] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2004] [Accepted: 01/11/2005] [Indexed: 11/25/2022]
Abstract
The adsorption of cationic Methylene Blue (MB) and anionic Procion Crimson H-EXL (PC) dyes from aqueous medium on pyrophyllite was studied. Changes in the electrokinetics of pyrophyllite as a function of pH were investigated in the absence and presence of multivalent cations. The results show that pyrophyllite in water exhibits a negative surface charge within the range pH 2-12. Pyrophyllite is found to be a novel adsorbent for versatile removal of cationic and anionic dyes. The negative hydrophilic surface sites of pyrophyllite are responsible for the adsorption of cationic MB molecules. The adsorption of anionic PC dye is possible after a charge reversal by the addition of trivalent cation of Al. Nearly 2 min of contact time are found to be sufficient for the adsorption of both dyes to reach equilibrium. The experimental data follow a Langmuir isotherm with adsorption capacities of 70.42 and 71.43 mg dye per gram of pyrophyllite for MB and PC, respectively. For the adsorption of both MB and PC dyes, the pseudo-second-order chemical reaction kinetics provides the best correlation of the experimental data.
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Affiliation(s)
- Aslihan Gücek
- Department of Environmental Engineering, University of Mersin, 33343 Mersin, Turkey
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