Adsorption performance of VOCs in ordered mesoporous silicas with different pore structures and surface chemistry

Dou, Baojuan; Hu, Qin; Li, Jinjun; Qiao, Shi Zhang; Hao, Zhengping

doi:10.1016/j.jhazmat.2010.12.051

Cited by 201 publications

(100 citation statements)

References 42 publications

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“…TGA results demonstrated that both new materials have a good degree of surface functionalization. Dou et al (2011) and Li et al (2007) have reported similar findings for SBA-15 materials.…”

supporting

confidence: 62%

“…In general, the organic functionality can be introduced by chemical attachment onto the silanol groups in the mesoporous silica or by co-condensation during the templateedirected synthesis of the mesoporous material, as well as post synthetic modification of SBA-15. Pure and functionalized SBA-15 have been used for adsorption of both organics and inorganics Corriu et al, 2004;Dou et al, 2011;Katiyar et al, 2006). However, no study till date has investigated the ability of SBA-15 and its functionalized derivatives for the sorption of PCP.…”

Section: Introductionmentioning

confidence: 99%

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Microscale scavenging of pentachlorophenol in water using amine and tripolyphosphate-grafted SBA-15 silica: Batch and modeling studies

Diagboya

Olu-Owolabi

Adebowale

2014

Journal of Environmental Management

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a b s t r a c tMesoporous silica SBA-15 meets most criteria for selection of water treatment adsorbents such as high specific surface area, large pore-size, chemical inertness, repertory of surface functional groups, good thermal stability, selectivity, regenerability, and low cost of manufacture. However, its use for water treatment is still largely unexplored. SBA-15 and its functionalized derivatives of aminopropyltriethoxysilane (SA) and tripolyphosphate (ST) were synthesized, characterized, and used to investigate pentachlorophenol (PCP) removal from aqueous solutions. Functionalization improved SBA-15 capacity for PCP removal from solution in accordance with the trend SBA-15 < ST < SA. Sorption rate experiments data fit the Lagergren pseudo-second order kinetics model. Intra-particle diffusion indicated that the sorption is controlled by two mechanisms: intra-particle and equilibrium diffusion. Adsorptive pore-filling and electrostatic interactions were implicated in the removal of PCP from solution. Electrostatic interaction led to !75% increase in sorption upon functionalization. The equilibrium sorption data of the PCP on these mesoporous materials fits the Freundlich isotherm. Desorption hysteresis was low for the pristine SBA-15, but the functionalized SBA-15 materials showed higher hysteresis. The results imply that functionalized SBA-15 sorbents are promising materials for microscale scavenging of PCP in solution.

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“…TGA results demonstrated that both new materials have a good degree of surface functionalization. Dou et al (2011) and Li et al (2007) have reported similar findings for SBA-15 materials.…”

supporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Microscale scavenging of pentachlorophenol in water using amine and tripolyphosphate-grafted SBA-15 silica: Batch and modeling studies

Diagboya

Olu-Owolabi

Adebowale

2014

Journal of Environmental Management

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“…In recent years, MPSs have been used to adsorb heavy metal ions (Aguado et al 2009;Li et al 2011;Addy et al 2012;Shahbazi et al 2013;Shahbazi et al 2014), organic dyes (Pugazhenthi 2009;Qin et al 2009;Huang et al 2011a;Huang et al 2011b;Boukoussa et al 2013;Badiei et al 2014), polycyclic aromatic hydrocarbons (Choudhary and Mantri 2000;Dou et al 2011;Vidal et al 2011;Balati et al 2014) and other organic pollutants and the results indicate that the MPSs have excellent adsorption ability (Kim et al…”

mentioning

confidence: 99%

Review of the use of mesoporous silicas for removing dye from textile wastewater

Salahshoor

Shahbazi

2014

European Journal of Environmental Sciences

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The textile industry is a major user of dyes and hence an important source of water pollution, which poses a threat to aquatic as well as human life. Adsorption is a widely used technique for separating and removing dye from wastewater. Recently the use of mesoporous silica (MPSs) as an adsorbent in wastewater treatment has received considerable attention. MPSs are emerging as potential adsorbents because of their surface area, tunable and uniform pore structure, high pore volume, ordered pore structure, thermal and mechanical stability, and extraordinarily wide possibilities for functionalization to increase their adsorption capacity. In this paper the ability of MPSs to absorb dyes from aqueous solutions is reviewed. This article provides information on adsorption studies carried out under different operational conditions such as contact time, solution pH, temperature, agitation speed, etc. This review also summarizes and attempts to compare the equilibrium isotherm and kinetic models, and the thermodynamic studies that report the adsorption of dyes onto MPSs. The literature reviewed, indicate that SBA-MPSs have a higher adsorption capacity than MCM-MPSs and functionalized MPSs a better adsorption capacity than MPSs. It is evident from the literature that the potential of MPS based nano-sorbents being used for removing dyes from aqueous solution is very high. However, still more research work is needed on developing cost effective and more efficient MPS based nano-sorbents for use commercially.

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“…The dead space was obtained by running blanks without the column. A longer breakthrough time for the adsorbent in the VOC adsorption process typically indicates a higher dynamic capacity [57,58]. As shown in Fig.…”

Section: Dynamic Benzene Adsorption Behaviors Of the Compositementioning

confidence: 96%

A hierarchically porous diatomite/silicalite-1 composite for benzene adsorption/desorption fabricated via a facile pre-modification in situ synthesis route

Yuan

Liu

et al. 2016

Chemical Engineering Journal

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Adsorption performance of VOCs in ordered mesoporous silicas with different pore structures and surface chemistry

Cited by 201 publications

References 42 publications

Microscale scavenging of pentachlorophenol in water using amine and tripolyphosphate-grafted SBA-15 silica: Batch and modeling studies

Microscale scavenging of pentachlorophenol in water using amine and tripolyphosphate-grafted SBA-15 silica: Batch and modeling studies

Review of the use of mesoporous silicas for removing dye from textile wastewater

A hierarchically porous diatomite/silicalite-1 composite for benzene adsorption/desorption fabricated via a facile pre-modification in situ synthesis route

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