Characterization of adsorptive capacity and mechanisms on adsorption of copper, lead and zinc by modified orange peel

Feng, Nan; Guo, Xueyi

doi:10.1016/s1003-6326(11)61309-5

Cited by 165 publications

(91 citation statements)

References 31 publications

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“…The peel includes the epidermis covering the exocarp consisting of irregular parenchymatous cells which completely enclose numerous glands or oil sacs (LIN et al, 2010). It is a rich source of essential oils, cellulose, pectin (galacturonic acid), hemicellulose and lignin, commonly used in diverse industries (VELÁZQUEZ-NUÑEZ et al, 2013;FENG & GOU, 2012;REZZADORI et al, 2012). Due to the interest of the potential use of orange by-products in industrial sources, the application of preservation technologies for this organic material is needed to avoid degradative reactions, such as oxidation or microbial spoilage.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic properties of water adsorption from orange peels

et al. 2015

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Orange peels are a promising agroindustry-waste that can be implemented in the extraction and production of pectin, as dietary fiber in food formulations, and as a biopolymer for metal adsorption in water treatment. The present work, therefore, aims to study the adsorption isotherms and the thermodynamic properties of the water adsorbed from orange peels (C. sinensis cv. Brazilians) at six different temperatures (20, 30, 40, 50, 60 and 70 °C) in the water activity range of 0.020 to 0.853. The GAB model was applied in modeling the experimental adsorption isotherms of orange peels, obtaining statistical values of R 2 = 0.996. Differential and integral thermodynamic properties of water sorption for orange peels were determined by the analytical derivation of the water activity with respect to the temperature from GAB model. Results of the differential thermodynamic properties showed an energetic interaction zone of water molecules with the material. Furthermore, integral thermodynamic properties showed an equilibrium zone controlled by the orange peel enthalpy and entropy. Finally, the orange peel power adsorption information can be used as a point of reference for the controlled process in the different application areas. RESUMO -As cascas de laranja são resíduos importantes da agroindústria que podem ser empregados na extração e produção de pectina, produção de fibra, em formulações de alimentos e como um biopolímero em processos de adsorção de metais no tratamento de águas. Assim, o objetivo deste trabalho foi estudar as isotermas de adsorção de casca de laranja (Citrus sinensis cv. Brasileira) a seis diferentes temperaturas (20, 30, 40, 50, 60 e 70 ° C) na faixa de atividade de agua de 0.020 até 0.853. Para isto, o modelo teórico de GAB foi usado para modelar as isotermas experimentais de adsorção da casca de laranja, mostrando valores estadísticos de R 2 = 0.996. Propriedades termodinâmicas diferenciais e integrais de sorção da água na casca de laranja foram determinadas através da derivada analítica da atividade de água com respeito à temperatura proveniente do modelo de GAB. Os resultados das propriedades termodinâmicas diferenciais mostraram uma área de interação energética das moléculas de água com o material. Além disso, as propriedades termodinâmicas integrais mostraram uma área de equilíbrio controlado pela entalpia e entropia para a casca de laranja. Finalmente, a informação sobre o poder de adsorção de casca de laranja pode ser usada como ponto de referência no controle de processos para as diferentes áreas de aplicação.Palavras-chave: agroresíduos; derivação analítica; modelo de GAB; modelagem; conteúdo de água.

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Section: Introductionmentioning

confidence: 99%

Thermodynamic properties of water adsorption from orange peels

et al. 2015

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“…The broad and intense absorption peaks between 3700 and 3000 cm À1 correspond to the O-H stretching vibrations of cellulose, hemicellulose, lignin, pectin and absorbed water (Feng & Guo, 2012). The stretching bands of the carbonyl group (C=O) of esterified carboxyl group (COOCH 3 ) and free carboxyl group (COOH) in pectin at 1736 and 1630 cm À1 , respectively, were also observed (Feng & Guo, 2012;Chyli nska et al, 2016). An O-CH 3 stretching band at 2926 cm À1 is related to methyl esters of galacturonic acid, which is a sugar acid and the main component of pectin (Gnanasambandam & Proctor, 2000).…”

Section: Fibre Compositionmentioning

confidence: 99%

“…The in vitro AFB 1 adsorption capacity values of the pretreated fibre were in the range of 53.10-74.34% and were significantly lower than that of the fibre from the untreated residues, which was 80.58%. Reduction in the carboxyl group therefore led to the decreased adsorption capacity of AFB 1 (Zhang et al, 2011;Feng & Guo, 2012). 2a).…”

Section: Glucose Dialysis Retardation Indexmentioning

confidence: 99%

Influences of pretreatment and drying methods on composition, micro/molecular structures and some health‐related functional characteristics of dietary fibre powder from orange pulp residues

Sungsinchai

Niamnuy

Jaree

et al. 2017

Int J of Food Sci Tech

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Summary Influences of pretreatment methods (washing, blanching, soaking in ethanol), drying methods (hot air‐drying, infrared‐drying, microwave‐drying) and drying temperature on selected characteristics of dietary fibre powder from orange pulp residues were investigated. Pretreatments improved the hydration properties, oil‐holding capacity and glucose dialysis retardation index, but led to losses of fibres, decreased α‐amylase inhibitory activity and aflatoxin B1 adsorption capacity. Hydration properties, oil‐holding capacity and glucose uptake depended on the structure and porosity of the fibre, while the ability to inhibit α‐amylase and AFB1 adsorption depended more on the content and molecular fingerprinting of the fibre. Drying condition did not significantly affect functional properties of the fibre, except for the ability to uptake glucose, inhibit α‐amylase and adsorb AFB1 (P ≤ 0.05). Hot air‐drying at 60 °C resulted in fibre with the highest ability to decrease the rate of glucose and AFB1 adsorption.

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“…On the other hand, the analysis of multimetallic adsorption with these biomasses is important in developing reliable water treatment technologies. However, few studies have focused on the simultaneous adsorption of metallic ions using orange peelbased adsorbents (Feng and Guo, 2012;Liang et al, 2011;Lugo-Lugo et al, 2012). For example, the adsorption of lead and zinc ions in binary solutions was studied in a fixed-bed column of sulfured orange peel .…”

Section: Introductionmentioning

confidence: 99%

Kinetics, Thermodynamics, and Competitive Adsorption of Heavy Metals from Water Using Orange Biomass

Sandoval-Flores

Alvarado-Reyna

Elvir-Padilla

et al. 2018

Water Environment Research

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Adsorption of heavy metals on modified orange biomass has been studied. This biomass was treated with NaOH and CaCl 2 to improve its adsorption properties. Kinetic and thermodynamic studies of the adsorption of Cd 2þ , Ni 2þ , Cu 2þ , and Zn 2þ were performed at different operating conditions, including competitive adsorption studies with binary metallic mixtures. Results show that this adsorption process was endothermic where an ion exchange mechanism played a relevant role. Adsorbent effectiveness decreased in binary solutions, indicating a strong antagonistic adsorption behavior caused by counter-ions. This antagonistic adsorption was highly dependent on the counter-ion type and its concentration. Multicomponent adsorption of Cu 2þ ions was not significantly affected by the presence of other metallic counter-ions, whereas the adsorption of Ni 2þ could be totally suppressed by the other ions. The modeling of binary adsorption isotherms was successful using the modified Langmuir equation, which outperformed the Ideal Absorbed Solution Theory-Sips and modified Redlich-Peterson models. Water Environ. Res., 90, 2114Res., 90, (2018.

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Characterization of adsorptive capacity and mechanisms on adsorption of copper, lead and zinc by modified orange peel

Cited by 165 publications

References 31 publications

Thermodynamic properties of water adsorption from orange peels

Thermodynamic properties of water adsorption from orange peels

Influences of pretreatment and drying methods on composition, micro/molecular structures and some health‐related functional characteristics of dietary fibre powder from orange pulp residues

Kinetics, Thermodynamics, and Competitive Adsorption of Heavy Metals from Water Using Orange Biomass

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