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Gama L, Sérgi Gomes MC, Scheufele FB, Paschoal SM, Pereira NC. Membrane process and adsorption on pine nut shell for removal of dye from synthetic wastewater. ENVIRONMENTAL TECHNOLOGY 2023:1-17. [PMID: 38158749 DOI: 10.1080/09593330.2023.2295827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 12/06/2023] [Indexed: 01/03/2024]
Abstract
Purification methods such as membrane technology and adsorption have been studied for the purification of textile effluents. This article aimed to evaluate the membrane separation process and adsorption on pine nut shell, separately and sequentially, for reactive dye blue 5G removal from a synthetic effluent. The membrane separation process was carried out in a front filtration module using polymeric membranes. The maximum dye retention was 35.9% using a regenerated cellulose membrane, with agitation and a pressure of 0.5 bar. The permeate flux was fully restored after cleaning the membrane. In the adsorption using pine nut shell, the best results were at pH 2, 50°C, and 50 ppm, with 85% dye removal. The Freundlich isotherm showed the best fit to the data, as did the pseudo-second-order kinetic model. The thermodynamic parameters indicated that the adsorption is of the physical type, with the process being endothermic and spontaneous. In the combined process, the permeate from the membrane separation process was subjected to adsorption on pine nut shell, achieving a removal rate of 98.7 for the initial concentration of 50 ppm. Therefore, this work shows the potential of pine nut shell as an adsorbent, not only to purify textile effluents but also to add value to a waste product, indicating that the combination of membrane technology and adsorption on pine nut shell could be an alternative for the treatment of textile effluents containing the reactive dye 5G blue.
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Affiliation(s)
- Lucas Gama
- Postgraduate Program in Chemical Engineering, Federal University of Technology of Paraná - UTFPR, Apucarana, Brazil
| | - Maria Carolina Sérgi Gomes
- Postgraduate Program in Chemical Engineering, Federal University of Technology of Paraná - UTFPR, Apucarana, Brazil
| | - Fabiano Bisinella Scheufele
- Postgraduate Program in Chemical and Biotechnological Processes, Federal University of Technology of Paraná - UTFPR, Toledo, Brazil
- Leibniz Institute of Agricultural Engineering and Bio-economy e.V. (ATB), Potsdam, Germany
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2
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Bakeeva RF, Garmonov SY, Vakhitova OE, Sopin VF. Determination of Amine-Containing Drugs in Micellar Matrices by Spectrophotometry Using Box–Behnken Plans. JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1134/s106193482206003x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Lobo-Recio MÁ, Rodrigues C, Custódio Jeremias T, Lapolli FR, Padilla I, López-Delgado A. Highly efficient removal of aluminum, iron, and manganese ions using Linde type-A zeolite obtained from hazardous waste. CHEMOSPHERE 2021; 267:128919. [PMID: 33220989 DOI: 10.1016/j.chemosphere.2020.128919] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 11/02/2020] [Accepted: 11/06/2020] [Indexed: 06/11/2023]
Abstract
Coal acid mine drainage (AMD) contaminates natural water to form mine-impacted water (MIW), which is characterized by high levels of acidity, sulfate, and metallic ions. This study investigates the use of a Linde Type-A (LTA) zeolite obtained from a hazardous industrial waste for Al3+, Fe2+, and Mn2+ removal from synthetic aqueous solutions. The aim of this study is to stablish a basis for the subsequent treatment of MIW in order to obtain reuse water. In a central composite rotatable design (CCRD) study, 8.25 g L-1 zeolite and 147 rpm were the optimal conditions for treating the multicomponent solution, yielding 99.9, 99.9 and 99.3% removal for Al3+, Fe2+, and Mn2+, respectively. Isothermal studies showed that the affinity of the ions by the zeolite were ranked as Al3+>Mn2+>Fe2+. The best fitting isothermal models for monocomponent solutions were Tóth, Freundlich, and Sips for Al3+, Fe2+, and Mn2+, respectively. In the multicomponent solution, Sips and Freundlich were the better fitting models for Al3+ and Mn2+, respectively, indicating a weakness of the sorbate-sorbent interactions. Kinetic studies revealed that the quantitative removal of Al3+ was achieved in 5 min. The multicomponent solution was transformed into water that was suitable for non-potable use after an optimal time of 60 min. The results demonstrate that LTA zeolite synthetized from hazardous waste has a high potential for remediating contaminated water by metallic ions at low dosages and short times. Using LTA zeolite for remediating contaminated water could make a positive contribution to the circular economy and environmental sustainability.
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Affiliation(s)
- María Ángeles Lobo-Recio
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), Campus Reitor João David Ferreira Lima, 88.040-900, Florianópolis, SC, Brazil; Department of Energy and Sustainability, Federal University of Santa Catarina (UFSC), Campus Araranguá, Rod. Gov. Jorge Lacerda, 3201, Jardim Das Avenidas, 88.906-072, Araranguá, SC, Brazil.
| | - Caroline Rodrigues
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), Campus Reitor João David Ferreira Lima, 88.040-900, Florianópolis, SC, Brazil.
| | - Thamires Custódio Jeremias
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), Campus Reitor João David Ferreira Lima, 88.040-900, Florianópolis, SC, Brazil.
| | - Flávio Rubens Lapolli
- Department of Environmental Engineering, Federal University of Santa Catarina (UFSC), Campus Reitor João David Ferreira Lima, 88.040-900, Florianópolis, SC, Brazil.
| | - Isabel Padilla
- National Center for Metallurgical Research (CENIM-CSIC), Avda. Gregorio del Amo 8, 28040, Madrid, Spain.
| | - Aurora López-Delgado
- National Center for Metallurgical Research (CENIM-CSIC), Avda. Gregorio del Amo 8, 28040, Madrid, Spain.
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4
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Acylation modification of konjac glucomannan and its adsorption of Fe (Ⅲ) ion. Carbohydr Res 2020; 497:108133. [PMID: 32891933 DOI: 10.1016/j.carres.2020.108133] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 08/11/2020] [Accepted: 08/11/2020] [Indexed: 11/21/2022]
Abstract
A biodegradable adsorbent, modified konjac glucomannan (MKGM), was prepared by konjac glucomannan (KGM) acylated with phthalic anhydride catalyzed using concentrated sulfuric acid. The modified conditions such as reaction temperature, mass ratio of phthalic anhydride to KGM, catalyst dosage and reaction time were investigated, respectively. MKGM exhibited preferable adsorption performance for the removal of Fe (Ⅲ) ion. The adsorption behavior was discussed using the Langmuir and Freundlich isotherm models. The results showed that the Freundlich linear model was suitable for describing the adsorption process of Fe (Ⅲ). The maximum adsorption capacity of MKGM for Fe (Ⅲ) ion was 31.87 mg g-1 at 298 K. The kinetics studies suggested that adsorption process followed the pseudo-second-order model and the adsorption process was mainly controlled by both surface reactivity and intra-particle diffusion. Together with the evaluation of the thermodynamic parameters such as Gibbs free energy, enthalpy and entropy changes, the results indicated that the adsorption process of Fe (Ⅲ) was endothermic, feasible, and spontaneous in nature. Hence, as a bioadsorbent, the MKGM has a promising potential for the removal of Fe (Ⅲ) ion from aqueous solutions.
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Moghazy RM, Labena A, Husien S, Mansor ES, Abdelhamid AE. Neoteric approach for efficient eco-friendly dye removal and recovery using algal-polymer biosorbent sheets: Characterization, factorial design, equilibrium and kinetics. Int J Biol Macromol 2020; 157:494-509. [PMID: 32339579 DOI: 10.1016/j.ijbiomac.2020.04.165] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/19/2020] [Accepted: 04/20/2020] [Indexed: 01/01/2023]
Abstract
A new approach of algal-polymer -sheets was performed by the embedding of two algal seaweeds (Ulva fasciata and Sargassum dentifolium) into cellulose acetate (CA) polymer forming two types of cellulose acetate; Ulva (CA-U) and Sargassum (CA-S) sheets. Afterward, the two sheets were characterized then subjected to 3-Rs evaluation (Removal, Recovery, and Reuse) of methylene blue dye (MB). Characterization data exhibited good properties for biosorption process. Algal biosorbents achieved more than twice biosorption capacity (Qmax) after the embedding into the polymer sheet. Additionally, according to factorial design data, the contact time and the dose of biosorbents had positive effects on the biosorption in the two sheets. Freundlich, Langmuir, and pseudo-second order models displayed good represented data in the two sheets. Furthermore, the two sheets (CA-U, followed by CA-S sheet) were successfully given more than 98% adsorption of 273 mg/l MB concentration. Moreover, the recovery and reuse data proved that the two sheets can be performed in good behavior for more than three cycles.
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Affiliation(s)
- Reda M Moghazy
- Water Pollution Research Department, National Research Centre, 33 El-Buhouth St., Dokki, Cairo 12622, Egypt.
| | - A Labena
- Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo 11727, Egypt
| | - Sh Husien
- Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo 11727, Egypt
| | - Eman S Mansor
- Water Pollution Research Department, National Research Centre, 33 El-Buhouth St., Dokki, Cairo 12622, Egypt
| | - Ahmed E Abdelhamid
- Polymers & Pigments Department, National Research Centre, 33 El-Buhouth St., Dokki, Cairo 12622, Egypt
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6
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Dorneles MS, Noreña CPZ. Microwave‐assisted extraction of bioactive compounds from
Araucaria angustifolia
bracts followed by encapsulation. J FOOD PROCESS PRES 2020. [DOI: 10.1111/jfpp.14484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Mariane Santos Dorneles
- Institute of Food Science and Technology Federal University of Rio Grande do Sul Porto Alegre Brazil
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Hanafy H, Sellaoui L, Thue PS, Lima EC, Dotto GL, Alharbi T, Belmabrouk H, Bonilla-Petriciolet A, Lamine AB. Statistical physics modeling and interpretation of the adsorption of dye remazol black B on natural and carbonized biomasses. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112099] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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8
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Haidukowski M, Casamassima E, Cimmarusti MT, Branà MT, Longobardi F, Acquafredda P, Logrieco A, Altomare C. Aflatoxin B 1-Adsorbing Capability of Pleurotus eryngii Mycelium: Efficiency and Modeling of the Process. Front Microbiol 2019; 10:1386. [PMID: 31293538 PMCID: PMC6604724 DOI: 10.3389/fmicb.2019.01386] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 06/03/2019] [Indexed: 11/17/2022] Open
Abstract
Aflatoxin B1 (AfB1) is a carcinogenic mycotoxin that contaminates food and feed worldwide. We determined the AfB1-adsorption capability of non-viable Pleurotus eryngii mycelium, an edible fungus, as a potential means for removal of AfB1 from contaminated solutions. Lyophilized mycelium was produced and made enzymatically inert by sterilization at high temperatures. The material thus obtained was characterized by scanning electron microscopy with regard to the morpho-structural properties of the mycotoxin-adsorbing surfaces. The active surfaces appeared rough and sponge-like. The AfB1-mycelium system reached equilibrium at 37°C, 30 min, and pH 5–7, conditions that are compatible with the gastro-intestinal system of animals. The system remained stable for 48 h at room temperature, at pH 3, pH 7, and pH 7.4. A thermodynamic study of the process showed that this is a spontaneous and physical adsorption process, with a maximum of 85 ± 13% of removal efficiency of AfB1 by P. eryngii mycelium. These results suggest that biosorbent materials obtained from the mycelium of the mushroom P. eryngii could be used as a low-cost and effective feed additive for AfB1 detoxification.
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Affiliation(s)
- Miriam Haidukowski
- Department of Biology, Agriculture and Food Science, Institute of Sciences of Food Production, National Research Council (CNR), Bari, Italy
| | - Eliana Casamassima
- Department of Biology, Agriculture and Food Science, Institute of Sciences of Food Production, National Research Council (CNR), Bari, Italy
| | - Maria Teresa Cimmarusti
- Department of Biology, Agriculture and Food Science, Institute of Sciences of Food Production, National Research Council (CNR), Bari, Italy
| | - Maria Teresa Branà
- Department of Biology, Agriculture and Food Science, Institute of Sciences of Food Production, National Research Council (CNR), Bari, Italy
| | | | - Pasquale Acquafredda
- Department of Earth and Geo-Environmental Sciences, University of Bari, Bari, Italy
| | - Antonio Logrieco
- Department of Biology, Agriculture and Food Science, Institute of Sciences of Food Production, National Research Council (CNR), Bari, Italy
| | - Claudio Altomare
- Department of Biology, Agriculture and Food Science, Institute of Sciences of Food Production, National Research Council (CNR), Bari, Italy
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9
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do Carmo SN, Merib J, Carasek E. Bract as a novel extraction phase in thin-film SPME combined with 96-well plate system for the high-throughput determination of estrogens in human urine by liquid chromatography coupled to fluorescence detection. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1118-1119:17-24. [PMID: 31005770 DOI: 10.1016/j.jchromb.2019.04.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 03/19/2019] [Accepted: 04/15/2019] [Indexed: 12/17/2022]
Abstract
In this study, an environmentally friendly and high-throughput method was developed for the determination of estrone (E1), 17β-estradiol (E2), 17α-ethinylestradiol (EE2) and estriol (E3) in human urine by liquid chromatography-fluorescence detector (HPLC-FLD). A biosorbent (bract) was proposed as extraction phase for Thin-Film SPME combined with 96-well system. The characterization of the biosorbent was performed by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The optimizations were carried out through univariate and multivariate approaches with optimal conditions comprised of urine samples diluted 40-fold, liquid desorption performed in methanol and addition of 20% (w/v) of NaCl in the sample. Considering an extraction/desorption cycle using the 96-well plate system, the sample preparation time was 1.7 min per sample, which contributes to the high-throughput of the method proposed. The analytical parameters of merit were determined and satisfactory results were achieved, including limits of detection ranging from 0.3 μg L-1 for estradiol to 3 μg L-1 for estrone, while limits of quantification varied from 1 μg L-1 for estradiol to 10 μg L-1 for estrone. The correlation coefficients ranged from 0.9947 for estrone to 0.9999 for estriol. The accuracy and intra-assay and intermediate precisions (RSD) were evaluated through extractions in diluted urine samples (40-fold) spiked with each analyte (1, 200 and 400 μg L-1 for E3; 0.1, 200 and 400 μg L-1 for E2; 0.5, 200 and 400 μg L-1 for EE2 and 10, 200 and 400 μg L-1 for E1). The relative recoveries (n = 3) ranged from 71 to 105%, intra-assay precision (n = 3) varied from 1 to 17% and intermediate precision (n = 9) ranged from 2 to 19%. The method developed can be successfully used for the quantification of estrogens in human urine samples.
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Affiliation(s)
| | - Josias Merib
- Departamento de Farmacociências, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre 90050170, RS, Brazil
| | - Eduardo Carasek
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis 88040900, SC, Brazil.
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10
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Shankaranarayanan B, Nakkeeran E. Purification of anthocyanins from red cabbage using semi interpenetrating network hydrogel beads in a packed bed column. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2018.1520728] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Balaji Shankaranarayanan
- Research Laboratory, Department of Biotechnology, Sri Venkateswara College of Engineering (Autonomous), Sriperumbudur Tk, Tamil Nadu, India
| | - Ekambaram Nakkeeran
- Research Laboratory, Department of Biotechnology, Sri Venkateswara College of Engineering (Autonomous), Sriperumbudur Tk, Tamil Nadu, India
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11
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Spectrophotometric determination of nitrate in hypersaline waters after optimization based on the Box-Behnken design. Microchem J 2019. [DOI: 10.1016/j.microc.2018.12.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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Protzek GR, Magalhães WLE, Bittencourt PRS, Claro Neto S, Villanova RL, Azevedo EC. The influence of fiber size on the behavior of the araucaria pine nut shell/PU composite. POLIMEROS 2019. [DOI: 10.1590/0104-1428.01218] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Abdel-Ghani NT, El-Chaghaby GA, Rawash ESA, Lima EC. Magnetic activated carbon nanocomposite from Nigella sativa L. waste (MNSA) for the removal of Coomassie brilliant blue dye from aqueous solution: Statistical design of experiments for optimization of the adsorption conditions. J Adv Res 2018; 17:55-63. [PMID: 31193316 PMCID: PMC6526164 DOI: 10.1016/j.jare.2018.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 12/16/2018] [Accepted: 12/17/2018] [Indexed: 10/31/2022] Open
Abstract
The present work was carried out to evaluate the removal of Coomassie brilliant blue dye by adsorption onto a magnetized activated carbon nanocomposite (MNSA) prepared from Nigella sativa L. (NS) waste. Different techniques, including infrared spectroscopy, scanning electron microscopy, and nitrogen adsorption/desorption, were used to characterize MNSA to investigate its adsorption properties. Adsorption experiments were carried out by simultaneously optimizing four variables that usually present a strong effect in adsorption studies. A full 24 factorial design with 3 central points was used. The four independent variables were the initial pH of the dye solution (pH), the initial dye concentration (Co), the adsorbent mass (m), and the contact time (t). The sorption capacity (q) of the adsorbent and the percentage of dye removal (% Rem) from an aqueous solution were used as the responses of the factorial design. The results indicated that pH, Co, and m were essential factors for the overall optimization of both responses (q and % Rem) and that several interactions of two, three and four factors occurred. Based on the design of the experiments (DOE), the optimized conditions for adsorption were pH = 2.00, Co = 40.0 mg L-1, m = 30.0 mg, and t = 3.0 h. Under these conditions, both responses, q and % Rem, were maximized, with a desirability of 85.54%. The findings of this study could be useful for industrial wastewater treatment systems.
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Affiliation(s)
- Nour T Abdel-Ghani
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | | | | | - Eder C Lima
- Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, 9500, 91501-970, P.O. Box 15003, Porto Alegre, RS, Brazil
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14
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Statistical analysis of Cu(II) and Co(II) sorption by apple pulp carbon using factorial design approach. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.08.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Lu F, Huang C, You L, Yin Y, Zhang Q. Cross-linked amino konjac glucomannan as an eco-friendly adsorbent for adsorption of Cr(VI) from aqueous solution. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.09.107] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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do Carmo SN, Merib J, Dias AN, Stolberg J, Budziak D, Carasek E. A low-cost biosorbent-based coating for the highly sensitive determination of organochlorine pesticides by solid-phase microextraction and gas chromatography-electron capture detection. J Chromatogr A 2017; 1525:23-31. [PMID: 29030033 DOI: 10.1016/j.chroma.2017.10.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/05/2017] [Accepted: 10/06/2017] [Indexed: 10/18/2022]
Abstract
In this study, an environmentally friendly and low-cost biosorbent coating was evaluated, for the first time, as the extraction phase for solid-phase microextraction (SPME) supported on a nitinol alloy. The characterization of the new fiber was performed by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The applicability of the biosorbent-based fiber in the determination of δ-hexachlorocyclohexane, aldrin, heptachlor epoxide, α-endosulfan, endrin and 4,4'-DDD in water samples was verified, with separation/detection by gas chromatography coupled to electron capture detection (GC-ECD). The influencing parameters (temperature, extraction time and ionic strength) were optimized simultaneously using a central composite design. The optimum conditions were: extraction time of 80min at 80°C and sodium chloride concentration of 15% (w/v). Satisfactory analytical performance was achieved with limits of detection (LOD) between 0.19 and 0.71ngL-1 and limits of quantification (LOQ) between 0.65 and 2.38ngL-1. The relative recoveries for the analytes were determined using river and lake water samples spiked at different concentrations and ranged from 60% for α-endosulfan to 113% for δ-hexachlorocyclohexane, with relative standard deviations (RSD) lower than 21%. The fiber-to-fiber reproducibility (n=3) was also evaluated and the RSD was lower than 14%. The extraction efficiency obtained for the proposed biosorbent coating was compared to a commercially available DVB/Car/PDMS coating. The proposed fiber provided very promising results, including LODs at the level of parts per trillion and highly satisfactory thermal and mechanical stability.
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Affiliation(s)
| | - Josias Merib
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis 88040900, SC, Brazil
| | | | - Joni Stolberg
- Universidade Federal de Santa Catarina, Departamento de Agronomia, Curitibanos, Santa Catarina, 89520-000, Brazil
| | - Dilma Budziak
- Universidade Federal de Santa Catarina, Departamento de Agronomia, Curitibanos, Santa Catarina, 89520-000, Brazil
| | - Eduardo Carasek
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis 88040900, SC, Brazil.
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17
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Sisman Y, Sisman A. The Factors Optimization on Georeferencing Analogue Maps. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2016. [DOI: 10.1007/s13369-016-2353-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Peralta RM, Koehnlein EA, Oliveira RF, Correa VG, Corrêa RC, Bertonha L, Bracht A, Ferreira IC. Biological activities and chemical constituents of Araucaria angustifolia : An effort to recover a species threatened by extinction. Trends Food Sci Technol 2016. [DOI: 10.1016/j.tifs.2016.05.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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19
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Sant'Anna V, Sfoglia NM, Mercali GD, Corrêa APF, Brandelli A. Effect of cooking on polyphenols and antioxidant activity ofAraucaria angustifoliaseed coat and evaluation of phytochemical and microbiological stability over storage. Int J Food Sci Technol 2016. [DOI: 10.1111/ijfs.13170] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Voltaire Sant'Anna
- Food Residues Processing Laboratory; Life and Environmental Area; State University of Rio Grande do Sul; Encantado Campus; Encantado Rio Grande do Sul Brazil
| | - Natalia M. Sfoglia
- Food Residues Processing Laboratory; Life and Environmental Area; State University of Rio Grande do Sul; Encantado Campus; Encantado Rio Grande do Sul Brazil
| | - Giovana D. Mercali
- Food Chemistry Laboratory; Institute of Food Science and Technology; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - Ana Paula F. Corrêa
- Laboratório de Bioquímica e Microbiologia Aplicada; Instituto de Ciência e Tecnologia de Alimentos; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
| | - Adriano Brandelli
- Laboratório de Bioquímica e Microbiologia Aplicada; Instituto de Ciência e Tecnologia de Alimentos; Universidade Federal do Rio Grande do Sul; Porto Alegre Brazil
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20
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You L, Song L, Lu F, Zhang Q. Fabrication of a copolymer flocculant and application for Cr(VI) removal. POLYM ENG SCI 2016. [DOI: 10.1002/pen.24354] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Lijun You
- Institute of Biomedical and Pharmaceutical Technology & College of Chemistry and Chemical Engineering, Fuzhou University; Fuzhou 350001 China
| | - Lidao Song
- Institute of Biomedical and Pharmaceutical Technology & College of Chemistry and Chemical Engineering, Fuzhou University; Fuzhou 350001 China
| | - Feifei Lu
- Institute of Biomedical and Pharmaceutical Technology & College of Chemistry and Chemical Engineering, Fuzhou University; Fuzhou 350001 China
| | - Qiqing Zhang
- Institute of Biomedical and Pharmaceutical Technology & College of Chemistry and Chemical Engineering, Fuzhou University; Fuzhou 350001 China
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21
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Sharifi F, Hadizadeh F, Sadeghi F, Hamed Mosavian MT, Zarei C. Process Optimization, Physical Properties, and Environmental Stability of an α-Tocopherol Nanocapsule Preparation Using Complex Coacervation Method and Full Factorial Design. CHEM ENG COMMUN 2014. [DOI: 10.1080/00986445.2014.973941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ozdemir U, Ozbay B, Ozbay I, Veli S. Application of Taguchi L32 orthogonal array design to optimize copper biosorption by using Spaghnum moss. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 107:229-235. [PMID: 25011119 DOI: 10.1016/j.ecoenv.2014.06.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 06/08/2014] [Accepted: 06/15/2014] [Indexed: 06/03/2023]
Abstract
In this work, Taguchi L32 experimental design was applied to optimize biosorption of Cu(2+) ions by an easily available biosorbent, Spaghnum moss. With this aim, batch biosorption tests were performed to achieve targeted experimental design with five factors (concentration, pH, biosorbent dosage, temperature and agitation time) at two different levels. Optimal experimental conditions were determined by calculated signal-to-noise ratios. "Higher is better" approach was followed to calculate signal-to-noise ratios as it was aimed to obtain high metal removal efficiencies. The impact ratios of factors were determined by the model. Within the study, Cu(2+) biosorption efficiencies were also predicted by using Taguchi method. Results of the model showed that experimental and predicted values were close to each other demonstrating the success of Taguchi approach. Furthermore, thermodynamic, isotherm and kinetic studies were performed to explain the biosorption mechanism. Calculated thermodynamic parameters were in good accordance with the results of Taguchi model.
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Affiliation(s)
- Utkan Ozdemir
- University of Kocaeli, Department of Environmental Engineering, 41380 Kocaeli, Turkey.
| | - Bilge Ozbay
- University of Kocaeli, Department of Environmental Engineering, 41380 Kocaeli, Turkey
| | - Ismail Ozbay
- University of Kocaeli, Department of Environmental Engineering, 41380 Kocaeli, Turkey
| | - Sevil Veli
- University of Kocaeli, Department of Environmental Engineering, 41380 Kocaeli, Turkey
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Sivarajasekar N, Baskar R. Adsorption of basic red 9 on activated waste Gossypium hirsutum seeds: Process modeling, analysis and optimization using statistical design. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.10.058] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Evaluation of 4-bromophenol biodegradation in mixed pollutants system by Arthrobacter chlorophenolicus A6 in an upflow packed bed reactor. Biodegradation 2014; 25:705-18. [DOI: 10.1007/s10532-014-9693-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 05/22/2014] [Indexed: 10/25/2022]
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25
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26
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Kushwaha S, Sudhakar P. Sorption Mechanism of Cd(II) and Zn(II) onto Modified Palm Shell. ADSORPT SCI TECHNOL 2013. [DOI: 10.1260/0263-6174.31.6.503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Shilpi Kushwaha
- Department of Chemistry, M. S. University of Baroda, Vadodara-390002, India
| | - Padmaja Sudhakar
- Department of Chemistry, M. S. University of Baroda, Vadodara-390002, India
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Xu H, Chen Y, Huang H, Liu Y, Yang Z. Removal of lead (II) and cadmium (II) from aqueous solutions using spentAgaricus bisporus. CAN J CHEM ENG 2012. [DOI: 10.1002/cjce.21671] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Bingol D, Kulcu M. Optimization of the solid phase extraction method for determination of Cu(ii) in natural waters by using response surface methodology. Analyst 2011; 136:4036-44. [DOI: 10.1039/c1an15358g] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Calvete T, Lima EC, Cardoso NF, Vaghetti JCP, Dias SLP, Pavan FA. Application of carbon adsorbents prepared from Brazilian-pine fruit shell for the removal of reactive orange 16 from aqueous solution: Kinetic, equilibrium, and thermodynamic studies. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2010; 91:1695-1706. [PMID: 20398999 DOI: 10.1016/j.jenvman.2010.03.013] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2009] [Revised: 03/03/2010] [Accepted: 03/23/2010] [Indexed: 05/29/2023]
Abstract
Activated (AC-PW) and non-activated (C-PW) carbonaceous materials were prepared from the Brazilian-pine fruit shell (Araucaria angustifolia) and tested as adsorbents for the removal of reactive orange 16 dye (RO-16) from aqueous effluents. The effects of shaking time, adsorbent dosage and pH on the adsorption capacity were studied. RO-16 uptake was favorable at pH values ranging from 2.0 to 3.0 and from 2.0 to 7.0 for C-PW and AC-PW, respectively. The contact time required to obtain the equilibrium using C-PW and AC-PW as adsorbents was 5 and 4h at 298 K, respectively. The fractionary-order kinetic model provided the best fit to experimental data compared with other models. Equilibrium data were better fit to the Sips isotherm model using C-PW and AC-PW as adsorbents. The enthalpy and entropy of adsorption of RO-16 were obtained from adsorption experiments ranging from 298 to 323 K.
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Affiliation(s)
- Tatiana Calvete
- Institute of Chemistry, Federal University of Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, Caixa Postal 15003, CEP 91501-970, Porto Alegre, RS, Brazil
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Royer B, Lima EC, Cardoso NF, Calvete T, Bruns RE. STATISTICAL DESIGN OF EXPERIMENTS FOR OPTIMIZATION OF BATCH ADSORPTION CONDITIONS FOR REMOVAL OF REACTIVE RED 194 TEXTILE DYE FROM AQUEOUS EFFLUENTS. CHEM ENG COMMUN 2010. [DOI: 10.1080/00986440903359004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Royer B, Cardoso NF, Lima EC, Ruiz VS, Macedo TR, Airoldi C. Organofunctionalized kenyaite for dye removal from aqueous solution. J Colloid Interface Sci 2009; 336:398-405. [DOI: 10.1016/j.jcis.2009.04.025] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2009] [Revised: 03/24/2009] [Accepted: 04/01/2009] [Indexed: 10/20/2022]
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32
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Vaghetti JCP, Lima EC, Royer B, da Cunha BM, Cardoso NF, Brasil JL, Dias SLP. Pecan nutshell as biosorbent to remove Cu(II), Mn(II) and Pb(II) from aqueous solutions. JOURNAL OF HAZARDOUS MATERIALS 2009; 162:270-280. [PMID: 18565650 DOI: 10.1016/j.jhazmat.2008.05.039] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2008] [Revised: 05/06/2008] [Accepted: 05/08/2008] [Indexed: 05/26/2023]
Abstract
In the present study we reported for the first time the feasibility of pecan nutshell (PNS, Carya illinoensis) as an alternative biosorbent to remove Cu(II), Mn(II) and Pb(II) metallic ions from aqueous solutions. The ability of PNS to remove the metallic ions was investigated by using batch biosorption procedure. The effects such as, pH, biosorbent dosage on the adsorption capacities of PNS were studied. Four kinetic models were tested, being the adsorption kinetics better fitted to fractionary-order kinetic model. Besides that, the kinetic data were also fitted to intra-particle diffusion model, presenting three linear regions, indicating that the kinetics of adsorption should follow multiple sorption rates. The equilibrium data were fitted to Langmuir, Freundlich, Sips and Redlich-Peterson isotherm models. Taking into account a statistical error function, the data were best fitted to Sips isotherm model. The maximum biosorption capacities of PNS were 1.35, 1.78 and 0.946mmolg(-1) for Cu(II), Mn(II) and Pb(II), respectively.
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Affiliation(s)
- Julio C P Vaghetti
- Universidade Federal do Rio Grande do Sul , Av. Bento Gonçalves 9500, Caixa Postal 15003, CEP 91501-970, Porto Alegre, RS, Brazil
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Vaghetti JCP, Lima EC, Royer B, Cardoso NF, Martins B, Calvete T. Pecan Nutshell as Biosorbent to Remove Toxic Metals from Aqueous Solution. SEP SCI TECHNOL 2009. [DOI: 10.1080/01496390802634331] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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34
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Vaghetti JC, Lima EC, Royer B, Brasil JL, da Cunha BM, Simon NM, Cardoso NF, Noreña CPZ. Application of Brazilian-pine fruit coat as a biosorbent to removal of Cr(VI) from aqueous solution—Kinetics and equilibrium study. Biochem Eng J 2008. [DOI: 10.1016/j.bej.2008.05.021] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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35
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Pavan FA, Mazzocato AC, Jacques RA, Dias SL. Ponkan peel: A potential biosorbent for removal of Pb(II) ions from aqueous solution. Biochem Eng J 2008. [DOI: 10.1016/j.bej.2008.01.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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36
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Ucun H, Bayhan YK, Kaya Y. Kinetic and thermodynamic studies of the biosorption of Cr(VI) by Pinus sylvestris Linn. JOURNAL OF HAZARDOUS MATERIALS 2008; 153:52-9. [PMID: 17875365 DOI: 10.1016/j.jhazmat.2007.08.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2007] [Revised: 08/09/2007] [Accepted: 08/09/2007] [Indexed: 05/17/2023]
Abstract
Biosorption equilibrium, kinetics and thermodynamics of chromium(VI) ions onto cone biomass were studied in a batch system with respect to temperature and initial metal ion concentration. The biosorption efficiency of chromium ions to the cone biomass decreased as the initial concentration of metal ions was increased. But cone biomass of Pinus sylvestris Linn. exhibited the highest Cr(VI) uptake capacity at 45 degrees C. The biosorption efficiency increased from 67% to 84% with an increase in temperature from 25 to 45 degrees C at an initial Cr(VI) concentration of 300 mg/L. The Langmuir isotherm model was applied to experimental equilibrium data of Cr(VI) biosorption depending on temperature. According to Langmuir isotherm, the monolayer saturation capacity (Q(max)) is 238.10 mg/g. The pseudo-first-order and pseudo-second-order kinetic models were applied to test the experimental data for initial Cr(VI). The pseudo-second-order kinetic model provided the best correlation of the used experimental data compared to the pseudo-first-order kinetic model. The activation energy of biosorption (E(a)) was determined as 41.74 kJ/mol using the Arrhenius equation. Using the thermodynamic equilibrium coefficients obtained at different temperatures, the thermodynamic constants of biosorption (DeltaG(0), DeltaH(0) and DeltaS(0)) were also evaluated.
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Affiliation(s)
- Handan Ucun
- Department of Environmental Engineering, Engineering Faculty, Atatürk University, Erzurum, Turkey.
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37
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Pavan FA, Lima EC, Dias SLP, Mazzocato AC. Methylene blue biosorption from aqueous solutions by yellow passion fruit waste. JOURNAL OF HAZARDOUS MATERIALS 2008; 150:703-12. [PMID: 17597293 DOI: 10.1016/j.jhazmat.2007.05.023] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2006] [Revised: 05/06/2007] [Accepted: 05/08/2007] [Indexed: 05/16/2023]
Abstract
The yellow passion fruit (Passiflora edulis Sims. f. flavicarpa Degener) (YPFW) a powdered solid waste, was tested as biosorbent for the removal of a cationic dye, methylene blue (MB), from aqueous solutions. Adsorption of MB onto this low-cost natural adsorbent was studied by batch adsorption at 25 degrees C. The effects of shaking time, biosorbent dosage and pH on adsorption capacity were studied. In alkaline pH region the adsorption of MB was favorable. The contact time required to obtain the maximum adsorption was 48 h at 25 degrees C. Four kinetic models were tested, being the adsorption kinetics better fitted to pseudo-first order and ion exchange kinetic models. The ion exchange and pseudo-first order constant rates were 0.05594 and 0.05455 h(-1), respectively. The equilibrium data were fitted to Langmuir, Freundlich, Sips and Redlich-Peterson isotherm models. Taking into account the analysis of the normal distribution of the residuals (difference of q(measured)-q(model)), the data were best fitted to Sips isotherm model. The maximum amount of MB adsorbed on YPFW biosorbent was 44.70 mg g(-1).
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Affiliation(s)
- Flavio A Pavan
- Instituto de Química, Universidade Federal do Rio Grande do Sul, UFRGS, Av. Bento Gonçalves 9500, Caixa Postal 15003, CEP 91501-970, Porto Alegre, RS, Brazil.
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38
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Jacques RA, Lima EC, Dias SL, Mazzocato AC, Pavan FA. Yellow passion-fruit shell as biosorbent to remove Cr(III) and Pb(II) from aqueous solution. Sep Purif Technol 2007. [DOI: 10.1016/j.seppur.2007.01.018] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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39
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Ferreira SLC, Bruns RE, Ferreira HS, Matos GD, David JM, Brandão GC, da Silva EGP, Portugal LA, dos Reis PS, Souza AS, dos Santos WNL. Box-Behnken design: An alternative for the optimization of analytical methods. Anal Chim Acta 2007; 597:179-86. [PMID: 17683728 DOI: 10.1016/j.aca.2007.07.011] [Citation(s) in RCA: 1192] [Impact Index Per Article: 70.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2007] [Revised: 07/01/2007] [Accepted: 07/03/2007] [Indexed: 11/21/2022]
Abstract
The present paper describes fundamentals, advantages and limitations of the Box-Behnken design (BBD) for the optimization of analytical methods. It establishes also a comparison between this design and composite central, three-level full factorial and Doehlert designs. A detailed study on factors and responses involved during the optimization of analytical systems is also presented. Functions developed for calculation of multiple responses are discussed, including the desirability function, which was proposed by Derringer and Suich in 1980. Concept and evaluation of robustness of analytical methods are also discussed. Finally, descriptions of applications of this technique for optimization of analytical methods are presented.
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Affiliation(s)
- S L C Ferreira
- Universidade Federal da Bahia, Instituto de Química, Campus Universitário de Ondina, Salvador, Bahia 40170-290, Brazil.
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40
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Kumar A, Prasad B, Mishra I. Process Parametric Study for Ethene Carboxylic Acid Removal onto Powder Activated Carbon using Box-Behnken Design. Chem Eng Technol 2007. [DOI: 10.1002/ceat.200700084] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Arenas LT, Lima EC, dos Santos AA, Vaghetti JC, Costa TM, Benvenutti EV. Use of statistical design of experiments to evaluate the sorption capacity of 1,4-diazoniabicycle[2.2.2]octane/silica chloride for Cr(VI) adsorption. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.10.050] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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42
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Lima EC, Royer B, Vaghetti JCP, Brasil JL, Simon NM, Dos Santos AA, Pavan FA, Dias SLP, Benvenutti EV, Silva EAD. Adsorption of Cu(II) on Araucaria angustifolia wastes: determination of the optimal conditions by statistic design of experiments. JOURNAL OF HAZARDOUS MATERIALS 2007; 140:211-20. [PMID: 16876938 DOI: 10.1016/j.jhazmat.2006.06.073] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2006] [Revised: 06/14/2006] [Accepted: 06/20/2006] [Indexed: 05/11/2023]
Abstract
Wastes of Araucaria angustifolia (named pinhão) natural (PW) and also loaded with Congo red (CRP) were tested as low-cost adsorbents for Cu(II) removal from aqueous solutions. In order to reduce the total number of experiments to achieve the best conditions of the batch adsorption procedure, three sets of statistical designs of experiments were carried-out for each adsorbent. Initially, a full 2(4) factorial design for each adsorbent with two central points (18 experiments) were performed, to optimize the following factors: mass of adsorbent (m), pH, time of contact (t) and initial metallic ion concentration (Co). These results indicated that almost all the main factors and its interactions were significant. It was verified for both adsorbents, that a mass of 30.0mg leaded to higher Cu(II) uptake and that the best pH for Cu(II) adsorption was 5.6. In order to continue the batch adsorption optimization of the systems, a central composite surface analysis design with two factors (Co, t) containing 13 experiments, divided in to four cube points, four axial points and five centre points was carried-out for each adsorbent. By performing these two sets of statistical design of experiments, the best conditions for Cu(II) uptake using pinhão wastes (PW) and pinhão wastes loaded with Congo red (CRP) using batch adsorption system, where: m=30.0mg of adsorbent; pH 5.6; t=2.5h. After optimizing the batch adsorption system by statistical design of experiments, isotherms for Cu(II) uptake using PW and CRP were performed. These isotherms fitted to the linear Langmuir and Freundlich models.
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Affiliation(s)
- Eder C Lima
- Instituto de Química, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Caixa Postal 15003, CEP 91501-970, Porto Alegre,RS, Brazil.
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43
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Jacques RA, Bernardi R, Caovila M, Lima EC, Pavan FA, Vaghetti JCP, Airoldi C. Removal of Cu(II), Fe(III), and Cr(III) from Aqueous Solution by Aniline Grafted Silica Gel. SEP SCI TECHNOL 2007. [DOI: 10.1080/01496390601069952] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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44
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Passos CG, Ribaski FS, Simon NM, dos Santos AA, Vaghetti JCP, Benvenutti EV, Lima EC. Use of statistical design of experiments to evaluate the sorption capacity of 7-amine-4-azaheptylsilica and 10-amine- 4-azadecylsilica for Cu(II), Pb(II), and Fe(III) adsorption. J Colloid Interface Sci 2006; 302:396-407. [PMID: 16920134 DOI: 10.1016/j.jcis.2006.06.052] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2006] [Revised: 06/27/2006] [Accepted: 06/27/2006] [Indexed: 10/24/2022]
Abstract
7-Amine-4-azaheptylsilica (AAH Si) and 10-amine-4-azadecylsilica (AAD Si) were prepared and used for removal of Cu(II), Pb(II), and Fe(III) from aqueous solutions. Full 2(3) factorial designs with two pseudo-central points were carried out in order to achieve the best conditions of the batch adsorption procedure for metallic ion uptake by the adsorbents. To continue the optimizations, central composite surface design was also employed. These two independent statistical designs of experiments lead to the following conditions: m=30.0 mg of adsorbent; pH 6.0 for Cu(II) and Pb(II), pH 4.0 for Fe(III); t of contact 180 min to guarantee equilibration at higher adsorbate concentration. After optimization of the conditions, isotherms of the metallic ions adsorbed on the AAH Si and AAD Si adsorbents were obtained, which were fitted to nonlinear Langmuir and Freundlich isotherm models.
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Affiliation(s)
- Camila G Passos
- Instituto de Química - Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Caixa Postal 15003, CEP 91501-970, Porto Alegre-RS, Brazil
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Arenas LT, Simon NM, Gushikem Y, Costa TMH, Lima EC, Benvenutti EV. A water soluble 3-n-propyl-1-azonia-4-azabicyclo[2.2.2]octanechloride silsesquioxane grafted onto Al/SiO2 surface: chromium adsorption study. ECLÉTICA QUÍMICA 2006. [DOI: 10.1590/s0100-46702006000200008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The water soluble material, 3-n-propyl-1-azonia-4-azabicyclo[2.2.2]octanechloride silsesquioxane (dabcosil silsesquioxane) was obtained. The dabcosil silsesquioxane was grafted onto a silica surface, previously modified with aluminum oxide. The resulting solid, dabcosil-Al/SiO2, presents 0.15 mmol of dabco groups per gram of material. The product of the grafting reaction was analyzed by infrared spectroscopy and N2 adsorption-desorption isotherms. The dabcosil-Al/SiO2 material was used as sorbent for chromium (VI) adsorption in aqueous solution.
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Affiliation(s)
| | | | | | | | - E. C. Lima
- Universidade Federal do Rio Grande do Sul
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