Adsorption of phenol and o-chlorophenol by mesoporous MCM-41

Mangrulkar, Priti A.; Kamble, Sanjay P.; Meshram, Jyotsna S.; Rayalu, Sadhana

doi:10.1016/j.jhazmat.2008.03.013

Cited by 120 publications

(61 citation statements)

References 39 publications

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“…So, micron-sized inorganic materials combining with surfactants are considered as effective adsorbents to extract organic contaminants from aqueous solutions [14][15][16][17][18][19][20][21].…”

Section: Role Of C N Tab In Tio 2 /C N Tab Nanoskeleton On Adsorptionmentioning

confidence: 99%

“…In recent years, organic/inorganic hybrid porous materials such as organic molecules-grafted mesoporous materials have attracted attention as effective adsorbents for removal of organic contaminants from water [5][6][7][8][9][10][11][12][13]. In addition, several reports describe that mesoporous silica materials (MCM-41) containing surfactant template also act as effective adsorbents for the removal of organic contaminants from aqueous solutions [14][15][16][17][18][19][20][21]. In the organic/inorganic hybrid adsorbents, inorganic parts act as adsorption substrate and provide large surface area.…”

Section: Introductionmentioning

confidence: 99%

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Titania/C TAB Nanoskeleton as adsorbent and photocatalyst for removal of alkylphenols dissolved in water

Sakai

Loves

Okada

et al. 2013

Journal of Hazardous Materials

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We report here on the removal of alkylphenols (phenol, 4-n-propylphenol, 4-nheptylphenol and 4-nonylphenol) dissolved in water using the composite particles of nanocrystalline titania and alkyltrimethylammonium bromide (C n H 2n+1 N(CH 3 ) 3 Br, C n TAB; n = 12, 14, 16 and 18) (named as TiO 2 /C n TAB Nanoskeleton) as adsorbents and photocatalysts. In particular, the adsorption of alkylphenols onto TiO 2 /C n TAB Nanoskeleton in water was investigated in terms of hydrophobic interaction between alkylphenols and C n TAB, surface area, pore structure and crystal size of TiO 2 /C n TAB Nanoskeleton.We revealed that C n TAB incorporated in the TiO 2 /C n TAB Nanoskeleton promotes the adsorption of alkylphenols onto TiO 2 /C n TAB Nanoskeleton due to the hydrophobic interaction between alkylphenols and C n TAB.On the other hand, the surface area, pore structure and crystal size of TiO 2 /C n TAB Nanoskeleton did not affect the adsorption of alkylphenols onto TiO 2 /C n TAB Nanoskeleton. We also found that the alkylphenols dissolved in water were completely removed by the combination of adsorption and photocatalytic degradation by the TiO 2 /C n TAB Nanoskeleton under UV irradiation. These results prove that the TiO 2 /C n TAB Nanoskeleton acts as in tandem an adsorbent and a photocatalyst for removal of alkylphenols dissolved in water.

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Section: Role Of C N Tab In Tio 2 /C N Tab Nanoskeleton On Adsorptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Titania/C TAB Nanoskeleton as adsorbent and photocatalyst for removal of alkylphenols dissolved in water

Sakai

Loves

Okada

et al. 2013

Journal of Hazardous Materials

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“…The K d values of Fe 3 O 4 @HMS-2 and HMS toward DDT were measured using Compared with HMS, higher adsorption capability and stronger uptake affinity of Fe 3 O 4 @HMS-2 toward DDT can be attributed to its numerous accessible pores and the slight surfactant templates retained in its pore channels, which enhance the uptake affinity toward organic molecules [14]. excellent magnetic responsivity, which is an advantage to their practical applications.…”

Section: Ddt Adsorptionmentioning

confidence: 99%

“…Due to their large surface area, tunable porosity, uniform pore size distribution, controlled morphology and high thermal stability, mesoporous silicas have been demonstrated to be good effective adsorbents of volatile organic compounds (VOCs), biomolecules and pesticides [12][13][14][15]. For many applications, small particle sizes are advantageous, but are not convenient to be separated from the liquid phase after use.…”

Section: Introductionmentioning

confidence: 99%

Using shell-tunable mesoporous Fe3O4@HMS and magnetic separation to remove DDT from aqueous media

Tian

Shen

et al. 2009

Journal of Hazardous Materials

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a b s t r a c t 1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane (DDT) is of concern in water treatment because of its persistence and health effects. A new concept is proposed to synthesize hexagonal mesoporous silica (HMS) with magnetic functionalization for DDT removal from aqueous media. Fe 3 O 4 nanocrystals were synthesized by a low-temperature solvothermal process, and then encapsulated in mesoporous silica through a packing approach, forming core-shell structured Fe 3 O 4 @HMS microspheres. The synthesized materials were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and nitrogen adsorption-desorption techniques. The results indicate that the silica shell conserves mesoporous structure after the removal of surfactant templates. Different from previous studies, the thickness, pore volume and surface area of silica shell can be controlled by adjusting the reaction condition. These Fe 3 O 4 @HMS materials show high adsorption capacity and fast adsorption rate for DDT. Because of the useful magnetic property and unique mesoporous structure, the synthesized materials provide a fast, convenient and highly efficient means to remove DDT from aqueous media.Crown

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“…Among all, solidphase extraction process using uranium-specific chelating sorbent has gained popularity due to its high separation efficiency even in ppb level, with adequate reproducibility of retention and simplicity (Huikuri and Salonen 2000;Chellam and Clifford 2002;Matsumiya et al 2003;Starvin and Rao 2004;Banerjee et al 2004;Gu et al 2005;Aydin and Soylak 2007;Atia et al 2007;Ciftci 2010). Various polymeric sorbents have been designed, developed and tested for recovery of uranium from diluted aqueous medium and nuclear effluents (Akkas and Guven 2000;Li et al 2007;Mangrulkar et al 2008;Sprynskyy et al 2010;Sepehrian et al 2012) and also from sea water (Rivas et al 2001;Kavash et al 2004). Scientific approaches ensuring efficiency and selectivity of sorbents based on the formation of functional groups impregnated on polymeric material are required for optimal filling of the metal coordination sphere (Lin et al 2010;Hosseini and Hosseini-Bandegharaei 2011;Hang Wang et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Extraction of uranium from nuclear industrial effluent using polyacrylhydroxamic acid sorbent

Satpati

Pal

Goswami

et al. 2013

Int. J. Environ. Sci. Technol.

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Solid-phase extraction process using chelating sorbent is a novel technique due to its high separation efficiency and simplicity. A designed three-dimensional crosslinked hydrophilic chelating polymeric sorbent, polyacrylhydroxamic acid, was developed for enhanced uptake of uranium from waste solution (pH 6-9) by complexation between the sorbent's active functional group and uranium. The sorbent was synthesized by polymerization of acrylamide with cross-linking agent, followed by conversion and functionalization with hydroxylamine hydrochloride. In this paper, removal and recovery of uranium from effluent of uranium material processing plant in the presence of competitive ions such as sodium, calcium and magnesium were studied using the sorbent. Uranium uptake property of the developed sorbent was also investigated with respect to sorbent's physical characteristics such as bead size distribution and bead swelling, in batch experiments. Distribution coefficient of uranium in the sorbent was substantially high (1,250 mL of effluent/g of sorbent), and immobilization factor was 0.028. The results showed that more than 90 % recovery of uranium is viable from nuclear effluent without preconditioning. Breakthrough profiles of column operation were successfully described for effective removal of uranium in continuous mode. The novel sorbent has been used for polishing the nuclear wastewater and hence to mitigate the environmental issues.

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Adsorption of phenol and o-chlorophenol by mesoporous MCM-41

Cited by 120 publications

References 39 publications

Titania/C TAB Nanoskeleton as adsorbent and photocatalyst for removal of alkylphenols dissolved in water

Titania/C TAB Nanoskeleton as adsorbent and photocatalyst for removal of alkylphenols dissolved in water

Using shell-tunable mesoporous Fe3O4@HMS and magnetic separation to remove DDT from aqueous media

Extraction of uranium from nuclear industrial effluent using polyacrylhydroxamic acid sorbent

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