Batch adsorptive removal of benzoic acid from aqueous solution onto modified natural vermiculite: Kinetic, isotherm and thermodynamic studies

Pouya, Ehsan Sadeghi; Abolghasemi, Hossein; Esmaieli, Mohamad; Fatoorehchi, Hooman; Hashemi, S. J.; Salehpour, Alireza

doi:10.1016/j.jiec.2015.06.024

Cited by 44 publications

(12 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We estimated the maximum adsorption capacity of benzoic acid on G-MWNT by fitting the adsorption data with Langmuir Isotherm equation given below 18 : where q e is the adsorption capacity at equilibrium, q max is maximum adsorption capacity, C e is the equilibrium concentration of the adsorbate, and b is the Langmuir adsorption constant. We find that the q max value for G-MWNT is ~65 mg/g and is similar to the adsorption capacity of other reported adsorbents such as modified bentonite and vermiculite 36 . The estimated b value was around 0.006 L/mg.…”

Section: Adsorption Of Benzoic Acid On Swntssupporting

confidence: 87%

High Adsorption of Benzoic Acid on Single Walled Carbon Nanotube Bundles

Silva

Arsano

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Removal of harmful chemicals from water is paramount to environmental cleanliness and safety. As such, need for materials that will serve this purpose is in the forefront of environmental research that pertains to water purification. Here we show that bundles of single walled carbon nanotubes (SWNTs), synthesized by direct thermal decomposition of ferrocene (Fe(C5H5)2), can remove emerging contaminants like benzoic acid from water with high efficiencies. Experimental adsorption isotherm studies indicate that the sorption capacity of benzoic acid on these carbon nanotubes (CNTs) can be as high as 375 mg/g, which is significantly higher (in some cases an order of magnitude) than those reported previously for other adsorbents of benzoic acid such as activated carbon cloth, modified bentonite and commercially available graphitized multiwall carbon nanotubes (MWNTs). Our Molecular Dynamics (MD) simulation studies of experimental scenarios provided major insights related to this process of adsorption. The MD simulations indicate that, high binding energy sites present in SWNT bundles are majorly responsible for their enhanced adsorptive behavior compared to isolated MWNTs. These findings indicate that SWNT materials can be developed as scalable materials for efficient removal of environmental contaminants as well as for other sorption-based applications.

show abstract

Section: Adsorption Of Benzoic Acid On Swntssupporting

confidence: 87%

High Adsorption of Benzoic Acid on Single Walled Carbon Nanotube Bundles

Silva

Arsano

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Эффективность концентрирования БК увеличивается при модифицировании вермикулита ПАВ (цетилтриметиламмоний бромид) и наночастицами диоксида кремния [29] за счет равномерного распределения в матрице органофильных слоев, что приводит к увеличению предельной сорбции БК с 42 (без наполнителя) до 47 мг/г и бо́льшим уровнем концентраций сорбата (табл. 1) по сравнению с другими модифицированными глинами [22,[30][31][32].…”

Section: концентрирование бензойной и салициловой кислот из водных срunclassified

Benzoic and Salicylic acids concentration and determination in food and water mediums

Sukhanov¹,

Savvina²,

Кушнир³

et al. 2018

АиК

View full text Add to dashboard Cite

Приведен обзор литературы по современным методам пробоподготовки и определения бензойной (БК) и салициловой кислот (СК) в различных водных средах и продуктах питания. Обсуждается применение органо-неорганических полимерных композиционных материалов на основе глин (бентонит, монтмориллонит, вермикулиты), коммерческих гранулированных активных углей, биоуглей, полимерных сорбентов природного и синтетического происхождения для концентрирования БК и СК из водных сред, в том числе из сточных вод и почвенных растворов. Описаны схемы получения и модифицирования сорбентов поверхностно-активными веществами, наночастицами и катионами металлов. Приведены значения предельной сорбции, уровни концентраций сорбируемых соединений, время достижения сорбционного равновесия, а также способы определения в концентратах сорбатов. Изложены способы выделения, изолирования, концентрирования или экстракции БК и СК из продуктов питания (алкогольные и безалкогольные напитки, молоко и молочные продукты, сиропы, крупы, овощи, фрукты и т.д.). Для определения БК и СК в различных объектах рекомендуются хроматографические (высокоэффективная жидкостная, ионная, газовая, тонкослойная хроматография), электрохимические, спектрометрические методы анализа и капиллярный электрофорез. Приведены условия детектирования аналитов, применяемые подвижные и неподвижные фазы, условия элюирования, составы фоновых растворов, характеристики электрохимического определения, а также пределы обнаружения в различных матрицах, содержащих БК и СК. Ключевые слова: бензойная кислота, салициловая кислота, концентрирование, определение, пищевые продукты, водные среды.

show abstract

“…Heavy metals cannot be destroyed [20], and common techniques to remove them from water include precipitation, electrochemical, membrane separation, adsorption, ion exchange and biological processes. However, adsorption is regarded as a promising technique due to its simplicity, low cost, efficiency and adsorbent reusability [21,22]. Recently, perovskite [23], and phyllosilicates, including sepiolite [24], montmorillonite [25], zeolite [26], and other clay minerals [27] have also been used to remove the toxic metals from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Single and Simultaneous As(III) Adsorption in Pearl River Delta Water by Hexylamine Functionalized Vermiculite

Ahmed

et al. 2021

Water

View full text Add to dashboard Cite

Enhanced As(III) removal (>99.7) was achieved by a novel organoclay (HEX-VER) adsorbent in Pearl River Delta water. Single and simultaneous As(III) removal in the presence of Cd(II) and/or Pb(II) by batch adsorption tests was analyzed. Spectroscopic, spectrometric, microscopic, and potentiometric techniques were used for characterization of the adsorbents. The parameters affecting As(III) adsorption, including pH, kinetic, isotherm, thermodynamic, and co-existing ions (Cl−, F−, NO3−, CO32−, SO42−, Ca2+ and Mg2+) were also investigated. The results showed that HEX-VER owned different morphology and larger average pore diameter after functionalization, resulting in an improvement of As (III) adsorption capacity. Further analysis confirmed that adsorption was of the monomolecular layer, well-described by the Langmuir isotherm model. The dominant mechanisms for As(III) removal were ion-exchange and complexation. Moreover, HEX-VER was regenerated for five consecutive cycles, and the removal ratio was ≈ 92%, showing its great regeneration potential. These findings suggest that the proposed inexpensive adsorbent has potential for practical applications of As(III) removal from river water.

show abstract

Batch adsorptive removal of benzoic acid from aqueous solution onto modified natural vermiculite: Kinetic, isotherm and thermodynamic studies

Cited by 44 publications

References 83 publications

High Adsorption of Benzoic Acid on Single Walled Carbon Nanotube Bundles

High Adsorption of Benzoic Acid on Single Walled Carbon Nanotube Bundles

Benzoic and Salicylic acids concentration and determination in food and water mediums

Enhanced Single and Simultaneous As(III) Adsorption in Pearl River Delta Water by Hexylamine Functionalized Vermiculite

Contact Info

Product

Resources

About