Functionalized mesoporous silica material and anionic dye adsorption: MCM-41 incorporated with amine groups for competitive adsorption of Acid Fuchsine and Acid Orange II

Wu, Yunhai; Zhang, Meili; Zhao, Huaiyang; Yang, Shengxin; Arkin, Aynigar

doi:10.1039/c4ra11737a

Cited by 63 publications

(36 citation statements)

References 72 publications

(70 reference statements)

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“…The adsorption kinetics is clearly modeled better by the pseudo-second-order kinetic model, which has higher correlation coefficient values (R 2 > 0.998) and theoretical equilibrium adsorption capacities closer to the experimental values in MO solutions with different initial concentrations. Similar kinetic behavior was also observed in adsorption of dye onto other adsorbents such as layered double hydroxide (LDH) [39], mesoporous silica [46], activated clays [47], and carbon [41]. It is also found that k 2 decreases with increasing initial MO concentration.…”

Section: Adsorption Kineticssupporting

confidence: 57%

Polyethylenimine nanofibrous adsorbent for highly effective removal of anionic dyes from aqueous solution

Zhang

et al. 2016

Sci. China Mater.

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(Li J)) most common byproducts of the paint manufacture, dyeing, cosmetics, textile, paper, leather, and other industries, and it can poison the environment and endanger the safety of drinking water and foodstuffs [5,6]. Therefore, removal of organic dye from water is a major project for the development of a sustainable society [7].Adsorption is recognized as one of the most promising methods because of its high effectiveness, low cost, and popularity [8,9]. Polymeric adsorbents are widely used as materials for the removal of organic or inorganic contaminants from water or air because of their advantages such as high flexibility in the design of structures and properties; chemical stability in harsh environments, including strong acidic, alkaline, salty, and oxidizing solutions; feasible regeneration; and thermal durability [9][10][11]. Polyethylenimine (PEI) has a high amine density and accessible primary amine sites on the chain ends, which act as desirable building blocks for the construction of adsorbents. For instance, many excellent CO 2 adsorbents have been prepared by integrating PEI into porous materials, including silica [12], mesoporous carbon [13], titanate [14], polymeric supports [15], and other metal oxide nanocomposites [16]. In addition, because of the high positive charge density on the protonated PEI backbone or side chains, PEI-based adsorbents exhibit good adsorption capacity for acidic gas or anionic materials such as polyanions and negatively charged organic or inorganic matter, including various anionic dyes [16][17][18][19].Electrospinning is an effective approach to prepare ultrafine fibers; it uses an electrostatic force from an external high-voltage electrical field between a spinneret and a grounded collector to draw very fine (typically micro-to nanoscale) fibers from a liquid droplet [20]. The ultrafine fibers produced by electrospinning have very high specific ABSTRACT We prepared a nanofibrous adsorbent for anionic dye removal from aqueous solution by electrospinning a modified polyethylenimine (m-PEI) and polyvinylidene fluoride (PVDF) blend. The electrospun nanofibrous adsorbent was confirmed to be a nanoscale, porous material with a positively charged surface; these characteristics are quite beneficial for anionic contaminant adsorption. Experimental adsorption of an anionic dye, methyl orange (MO), demonstrates that this adsorbent can rapidly remove MO from aqueous solution; its maximum adsorption capacity was 633.3 mg g −1 , which is much higher than that of previously reported adsorbents. After immersion in a basic solution, the adsorbent was well regenerated and showed good recyclability. The adsorption performance of the nanofibrous adsorbent is greatly influenced by the temperature, initial MO concentration, and pH of the solution. We further found that MO adsorption onto the adsorbent can be described well by the pseudo-second-order kinetic model and Langmuir isotherm model. Weber-Morris plots suggested that the adsorption of MO onto the nanofibrous mat was affected...

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Section: Adsorption Kineticssupporting

confidence: 57%

Polyethylenimine nanofibrous adsorbent for highly effective removal of anionic dyes from aqueous solution

Zhang

et al. 2016

Sci. China Mater.

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“…The increase in ΔG 0 values with the increase in temperature demonstrates a negative effect of temperature on adsorption. Moreover, negative ΔS 0 values indicate a reduction in the randomness at the solid-liquid interface during the adsorption [30,43]. Furthermore, the results of adsorption thermodynamics agree well with the equilibrium isotherms obtained in this study, and the optimal reaction temperature was 25˚C.…”

Section: Adsorption Thermodynamicssupporting

confidence: 86%

Efficient removal of acid dye from aqueous solutions via adsorption using low-cost blast-furnace slag

Zhao

Qiu

Wang

et al. 2016

Desalination and Water Treatment

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2016): Efficient removal of acid dye from aqueous solutions via adsorption using low-cost blast-furnace slag, Desalination and Water Treatment, A B S T R A C TAcid Red 138 (AR138) and Acid Green 27 (AG27) were efficiently removed from aqueous solutions via adsorption using modified blast-furnace slag (MBFS). The surface of MBFS was investigated using scanning electron microscopy and Brunauer-Emmett-Teller method. The effects of operating parameters such as adsorbent dosage, pH, and temperature on the dye removal were studied. The pseudo-first-order, pseudo-second-order, and intraparticle diffusion models were used to describe the kinetics data. The equilibrium isotherms were analyzed using the Langmuir and Freundlich adsorption models. The experimental data fitted well to the pseudo-second-order kinetics model for AR138 and AG27. The Freundlich isotherm described the equilibrium data of acid dyes on MBFS better than the Langmuir isotherm. Furthermore, the thermodynamic parameters (ΔG 0 < 0, ΔH 0 < 0, and ΔS 0 < 0) showed that the adsorption reactions of AR138 and AG27 onto MBFS were feasible, spontaneous, and exothermic under the investigated conditions. Thus, MBFS is an effective biosorbent for the removal of acid dyes.

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“…Total number of scans for 31 P, 29 Si and 13 C were 512, 512 and 1810, respectively. The Spectrum two FT-IR spectrophotometer (Perkin-Elmer) was used to record FT-IR spectra in the range of 450 to 4000 cm -1 using KBr pellet.…”

Section: Characterizationmentioning

confidence: 99%

“…[26][27][28] Among these, adsorption of these pollutants by solid porous adsorbents seems more feasible, versatile, efficient, economical and very importantly free from secondory pollutants. [29][30] In this article, we report the sonochemical synthesis of cyclophosphazene bridged mesoporous organosilicas. These high surface area cyclophosphazene bridged mesoporous organosilicas (CPMOs) were then used for removal of organic dyes and Cr(VI) ions in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Sonochemical synthesis of cyclophosphazene bridged mesoporous organosilicas and their application in methyl orange, congo red and Cr(vi) removal

2015

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Functionalized mesoporous silica material and anionic dye adsorption: MCM-41 incorporated with amine groups for competitive adsorption of Acid Fuchsine and Acid Orange II

Abstract: Adsorption of two representative anionic dyes (Acid Fuchsine (AF) and Acid Orange II (AO)) using MCM-41 functionalized with amine groups in a mesoporous silica framework (NH2–MCM-41) as the adsorbent was investigated.

Cited by 63 publications

References 72 publications

Polyethylenimine nanofibrous adsorbent for highly effective removal of anionic dyes from aqueous solution

Polyethylenimine nanofibrous adsorbent for highly effective removal of anionic dyes from aqueous solution

Efficient removal of acid dye from aqueous solutions via adsorption using low-cost blast-furnace slag

Sonochemical synthesis of cyclophosphazene bridged mesoporous organosilicas and their application in methyl orange, congo red and Cr(vi) removal

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