Modification and application of mesoporous carbon adsorbent for removal of endocrine disruptor bisphenol A in aqueous solutions

Liu, Fang; Dai, Yexin; Zhang, Shuang; Li, Jiaman; Zhao, Chaocheng; Wang, Yongqiang; Liu, Chunshuang; Sun, Juan

doi:10.1007/s10853-017-1705-2

Cited by 27 publications

(15 citation statements)

References 40 publications

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“…BPA is a neutral molecule and forms divalent anions at around pH 9.56 (Bhatnagar and Anastopoulos 2017). The pKa of BPA is 9.6 -10.2 , and thus BPA can be ionized in pH from 9-10 which increases the formation of bisphenolate anions (Liu et al 2018). Li et al (2015) investigated the effects of pH towards adsorption of BPA using HTAB-bentonite and found that there was a slight increase of BPA between pH 4-7, while tat pH>7, a significant decrease of BPA removal was observed.…”

Section: Effects Of Initial Ph Solution Towards Bpa Removalmentioning

confidence: 99%

Bisphenol A Adsorption from Aqueous Solution using Graphene Oxide-Alginate Beads

Fuzil

Othman

Jamal

et al. 2021

Preprint

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In this study, the potential of graphene oxide-alginate beads (GO-AB) as an adsorbent for bisphenol A (BPA) removal from aqueous solution was investigated. GO was first prepared via modified Hummers’ techniques and aerogel alginate bead with embedded GO was prepared using an extrusion dripping method, where calcium chloride was utilized as a curing agent. The physicochemical characteristics of GO-AB were investigated using XRD, FTIR, BET, TGA. The results revealed that crystal structure and the surface groups of GO and alginate were retained upon formation of GO-AB. A batch adsorption testing was carried out as a function of pH (3, 7, and 9), contact time (up to 420 mins) and initial concentration of BPA (50 - 200 mg·L-1). The adsorption rate was typically faster at the beginning of the adsorption process and started to level off after 180 mins. AB and GO-AB had better adsorption performances at neutral condition (pH 7) as compared to alkaline and acidic environments owing to repulsive electrostatic interaction between BPA and the adsorbent surface’s charge. The sorption kinetic data was observed fitted to the pseudo-second-order kinetics model (R2>0.98) and obeyed the Freundlich isotherm model adsorption behaviour as compared to Langmuir. However, the RL value of Langmuir model is between 0 to 1, which implies favourable adsorption process. The maximum BPA adsorption capacity for AB and GO-AB was found to be 250.00 and 384.62 mg·g-1, respectively indicating that GO-AB is a promising adsorbent for BPA removal from aqueous solution.

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Section: Effects Of Initial Ph Solution Towards Bpa Removalmentioning

confidence: 99%

Bisphenol A Adsorption from Aqueous Solution using Graphene Oxide-Alginate Beads

Fuzil

Othman

Jamal

et al. 2021

Preprint

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“…3b). The presence of mesopores on MWEPN structure is essential because these mesoporous acting as a transport channel for adsorbate adsorption that can improve adsorption capacity of the material especially for large size molecules (Yang et al, 2017;Liu et al, 2018). Table 2 summarises the textural parameters of MWEPN adsorbent.…”

Section: Characterisation Of the Activated Carbonmentioning

confidence: 99%

Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions

Cunha

Lima

Cimirro

et al. 2018

Environ Sci Pollut Res

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Eragrostis plana Nees leaves, abundant lignocellulosic biomass, was used as carbon source for preparation of activated carbon, by using microwave-assisted pyrolysis and chemical activation. The novel activated carbon (MWEPN) was characterised by FTIR, CHN elemental analysis, Boehm's titration method, TGA, SEM, N adsorption/desorption curves and pH of the point of zero charge (pH). Afterwards, the adsorbent was successfully employed for adsorption of the two emerging contaminants (caffeine and 2-nitrophenol). The results indicated that MWEPN had a predominantly mesoporous structure with a high surface area of 1250 m g. FTIR analysis indicated the presence of carbonyl, hydroxyl and carboxylic groups on the surface of MWEPN. The Boehm analysis showed the existence of the high amount of acid moieties on the surface of activated carbon. Adsorption kinetic indicated that the system followed the Avrami fractional order at the optimal pH of 7. The equilibrium time was attained at 30 min. The Liu isotherm model better described the isothermal data. Based on the Liu isotherm, the maximum sorption capacities (Q) of caffeine and 2-nitrophenol adsorbed onto activated carbon at 25 °C were 235.5 and 255.8 mg g, respectively.

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“…Desorption of BPA from solid nanoparticles during water sample pretreatment is regarded as the panacea for quantitative analysis in all serious environmental studies. It has been reported that either ethanol solution (75%) or ammonium hydroxide solution (0.5 M) is capable of desorbing BPA off carbon adsorbents [36]. Indeed, the BPA recovery rate increased with increasing solvent polarity, indicating a stronger interaction with BPA when the number of available polar sites in the solvent molecule became greater [39].…”

Section: Introductionmentioning

confidence: 97%

“…The largest adsorption of BPA by poly-2-vinylpyridine-functionalized magnetic nanoparticles was attained at pH 5.0, probably due to hydrogen-bonding interactions [35]. A pH value of 3-8 is conducive to the adsorption of BPA on mesoporous carbon, as the principal adsorption mechanism is H-bonding [36]. Due to the high K ow value of BPA, the synergy of hydrogen bond-forming alkaline imidazole groups and hydrophobic hexadecyl groups benefits BPA removal from aqueous solutions using silica (SiO 2 ) in the pH range of 4.0-9.0 [37].…”

Section: Introductionmentioning

confidence: 99%

Ion-Trap Mass Spectrometric Analysis of Bisphenol A Interactions With Titanium Dioxide Nanoparticles and Milk Proteins

2020

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Quantitative analysis of endocrine-disrupting molecules such as bisphenol A (BPA) in freshwater to determine their widespread occurrence in environmental resources has been challenged by various adsorption and desorption processes. In this work, ion trap mass spectrometry (ITMS) analysis of BPA was aimed at studying its molecular interactions with titanium dioxide (TiO2) nanoparticles and milk whey proteins. Addition of sodium formate prevented TiO2 nanoparticles from sedimentation while enhancing the electrospray ionization (ESI) efficiency to produce an abundance of [BPA + Na]+ ions at m/z 251.0. More importantly, the ESI-ITMS instrument could operate properly during a direct infusion of nanoparticles up to 500 μg/mL without clogging the intake capillary. Milk protein adsorption of BPA could decrease the [BPA + Na]+ peak intensity significantly unless the proteins were partially removed by curdling to produce whey, which allowed BPA desorption during ESI for quantitative analysis by ITMS.

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Modification and application of mesoporous carbon adsorbent for removal of endocrine disruptor bisphenol A in aqueous solutions

Cited by 27 publications

References 40 publications

Bisphenol A Adsorption from Aqueous Solution using Graphene Oxide-Alginate Beads

Bisphenol A Adsorption from Aqueous Solution using Graphene Oxide-Alginate Beads

Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions

Ion-Trap Mass Spectrometric Analysis of Bisphenol A Interactions With Titanium Dioxide Nanoparticles and Milk Proteins

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