Synthesis of amino-modified ordered mesoporous silica as a new nano sorbent for the removal of chlorophenols from aqueous media

Anbia, Mansoor; Lashgari, Maryam

doi:10.1016/j.cej.2009.02.023

Cited by 124 publications

(69 citation statements)

References 45 publications

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“…To prepare the amino-modified magMCM-48 sample, the procedure was carried out as follows [22,29]: magMCM-48 (2.0 g) was suspended in (70 mL) toluene and the mixture was stirred for an hour and then to this mixture (1.0 g) APTES was added and the mixture was refluxed overnight. The solid product was separated by magnetic field.…”

Section: Synthesis Of Amino-modified Magmcm-48mentioning

confidence: 99%

“…Silanol groups and amino groups are effective for the adsorption of organic compounds due to their high adsorption energy or potential charge association. In addition, the presence of free electron pairs on amine group within mesopores of MCM-48 materials should lead to sorptive properties for weak acidic organic compounds in water [22]. Researchers have used ligands containing multi-amine groups in a chain [23,24] or ligands involving dendrimer-amines [25] to increase removal efficiency of these compounds into the mesoporous structure.…”

Section: Introductionmentioning

confidence: 99%

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Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

Anbia

Khoshbooei

2014

J Nanostruct Chem

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A novel adsorbent with magnetic Fe 3 O 4 nanoparticles and melamine-based dendrimer amine functionalized mesoporous silica (MDA-magMCM-48) has been developed which would not destroy the pore structure and could supply a convenient way for separation of the adsorbent from water. The obtained adsorbent was characterized by XRD, SEM, TEM, FTIR, TGA and N 2 adsorptiondesorption isotherm. The objective of this study was to evaluate the effectiveness of mesoporous MDA-magMCM-48 material for the sorption of 4-chlorophenol (4-CP) and 4-bromophenol (4-BP). The effects of various operating parameters such as initial concentration, pH of the solution and contact time were thoroughly studied. From the sorption studies it is observed that the uptake of 4-CP (239.55 mg/g) was higher than that of 4-BP (222.9 mg/g). The Freundlich and Langmuir adsorption isotherms are used to model the equilibrium adsorption data.

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Section: Synthesis Of Amino-modified Magmcm-48mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

Anbia

Khoshbooei

2014

J Nanostruct Chem

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“…Adsorpsiyon işlemi sırasında adsorbanın termal olarak kararlı olması ve adsorpsiyondan kaynaklı herhangi bir kimyasal değişim gerçekleşmediği için, MCM-41-A adsorpsiyon öncesi ve sonrası benzer davranış göstermektedir. 2935 cm -1 ve 1483-1318 cm -1 'deki bantlar yüzeye bağlanan APS yapısındaki C-H grubundan [32], 693 cm -1 'deki bant Si-CH2R'nin CH2 titreşiminden [33], 1560 cm -1 'deki bant N-H deformasyonundan [34], 1031 cm -1 'deki bant ise asimetrik Si-O-Si gerilmesinden kaynaklanmaktadır. …”

Section: Co2 Adsorpsiyonu Sonrası Numunelerin Ftir Analiziunclassified

Amin Grupları ile Fonksiyonelleştirilmiş MCM-41 Mezogözenekli Silika Üzerine CO2 Adsorpsiyonu

Yılmaz

2017

SDÜ Fen Bil Enst Der

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Özet: Bu çalışmada, saf silika kaynağından üretilen mezogözenekli silika MCM-41'in yüzeyi aşılama yöntemiyle amin grupları ile fonksiyonelleştirilmiştir. Fonksiyonelleştirilen ürünün karakterizasyonu X-ışınları difraktometresi (XRD), termogravimetri/diferansiyel termal analiz (TG/DTA), Fourier dönüşümlü infrared spektroskopisi (FTIR) ve Brunauer-Emmett-Teller (BET) cihazında gerçekleştirilmiştir. Fonksiyonelleştirilen ve fonksiyonelleştirilmemiş MCM-41 adsorbanlarının CO2 adsorpsiyon kapasiteleri 25, 75 ve 100°C'de TG/DTA cihazı ile belirlenmiştir. Sonuç olarak, fonksiyonelleştirilen MCM-41'in daha yüksek CO2 adsorpsiyon kapasitesine sahip olduğu görülmüştür. CO2 Adsorption on Functionalized MCM-41 Mesoporous Silica with Amine GroupsKeywords MCM-41, CO2, Adsorption, Grafting, Amine group Abstract: In this study, the surface of mesoporous silica MCM-41 which synthesized from pure silica was functionalized with amine group by grafting. The functionalized sample was characterized by X-ray powder diffractometer (XRD), thermogravimetry/differential thermal analysis (TG/DTA) and Fourier transform infrared spectroscopy (FTIR) and Brunauer-Emmett-Teller (BET). The CO2 adsorption capacity of the functionalized and non-functionalized MCM-41 adsorbents was determined at 25, 75 and 100°C by TG/DTA equipment. As a result, it was seen that the functionalized MCM-41 has higher adsorption capacity.

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“…Among these sorbent materials, activated carbons are the most widely used and exhibit good adsorption capacities for many organic pollutants due to their porous structures and large surface areas (Aksu and Yener 2001;Anbia and Ghaffari 2009;Nath and Bhakhar 2010;Zhou et al 2014). However, the application of activated carbons can be limited by a range of factors, including high cost, poor adsorption selectivity, poor mechanical strength, and expensive and difficult regeneration (Ferro-Garcia et al 1996;Anbia and Ghaffari 2009;Anbia and Lashgari 2009;Ahmad et al 2011;Shah et al 2011). In contrast, zeolites have a number of potential advantages as sorbents, such as good mechanical strength, good thermal stability, and high sorption selectivity (Wang and Peng 2010;Misaelides 2011).…”

Section: Responsible Editor: Philippe Garrigues Submitted To: Environmentioning

confidence: 99%

“…They are also widely used as intermediates in the production of dyes, plastics, pharmaceuticals, pesticides, and insecticides (Radhika and Palanivelu 2006;Anbia and Lashgari 2009;Lua and Jia 2009;Liu et al 2010;Yang et al 2015). In addition, conversion of phenols to chlorophenols could occur during chlorination of drinking water treatment, resulting in a medicinal taste and smell (Anbia and Lashgari 2009;Singh et al 2012;Chen et al 2013). …”

Section: Introductionmentioning

confidence: 99%

Sorption of chlorophenols on microporous minerals: mechanism and influence of metal cations, solution pH, and humic acid

Yang

Cheng

2016

Environ Sci Pollut Res

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Sorption of 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP), and 2,4,6-trichlorophenol (2,4,6-TCP) on a range of dealuminated zeolites were investigated to understand the mechanism of their sorption on microporous minerals, while the influence of common metal cations, solution pH, and humic acid was also studied. Sorption of chlorophenols was found to increase with the hydrophobicity of the sorbates and that of the microporous minerals, indicating the important role of hydrophobic interactions, while sorption was also stronger in the micropores of narrower sizes because of greater enhancement of the dispersion interactions. The presence of metal cations could enhance chlorophenol sorption due to the additional electrostatic attraction between metal cations exchanged into the mineral micropores and the chlorophenolates, and this effect was apparent on the mineral sorbent with a high density of surface cations (2.62 sites/nm 2 ) in its micropores. Under circum-neutral or acidic conditions, neutral chlorophenol molecules adsorbed into the hydrophobic micropores through displacing the Bloosely bound^water molecules, while their sorption was negligible under moderately alkaline conditions due to electrostatic repulsion between the negatively charged zeolite framework and anionic chlorophenolates. The influence of humic acid on sorption of chlorophenols on dealuminated Y zeolites suggests that its molecules did not block the micropores but created a secondary sorption sites by forming a Bcoating layer^on the external surface of the zeolites. These mechanistic insights could help better understand the interactions of ionizable chlorophenols and metal cations in mineral micropores and guide the selection and design of reusable microporous mineral sorbents for sorptive removal of chlorophenols from aqueous stream.

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Synthesis of amino-modified ordered mesoporous silica as a new nano sorbent for the removal of chlorophenols from aqueous media

Cited by 124 publications

References 45 publications

Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

Amin Grupları ile Fonksiyonelleştirilmiş MCM-41 Mezogözenekli Silika Üzerine CO2 Adsorpsiyonu

Sorption of chlorophenols on microporous minerals: mechanism and influence of metal cations, solution pH, and humic acid

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