Potential of amino-functionalized cellulose as an alternative sorbent intended to remove anionic dyes from aqueous solutions

Silva, Lucinaldo S.; Ferreira, Francisco J.L.; Silva, Mateus S.; Citó, Antônia M.G.L.; Meneguin, Andréía Bagliotti; Sábio, Rafael Miguel; Barud, Hernane S.; Bezerra, Roosevelt D.S.; Osajima, Josy Anteveli; Filho, Edson Cavalcanti da Silva

doi:10.1016/j.ijbiomac.2018.05.034

Cited by 41 publications

(15 citation statements)

References 94 publications

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“…The band observed at 554 cm −1 is assigned to Al-O-Si vibration. For CIP, the bands at 3520 and 3436 cm −1 are assigned to hydroxyl and N-H groups [43], respectively. The bands located at 1714, 1621, and 1270 cm −1 belong to C=O, C=C, and C-N band [43][44][45], respectively.…”

Section: Adsorbent Characterizationmentioning

confidence: 99%

“…For CIP, the bands at 3520 and 3436 cm −1 are assigned to hydroxyl and N-H groups [43], respectively. The bands located at 1714, 1621, and 1270 cm −1 belong to C=O, C=C, and C-N band [43][44][45], respectively. After CIP adsorption, the band assigned to N-H vibration (3436 cm −1 ) for CIP emerges and the intensity becomes stronger with prolonging the adsorption time.…”

Section: Adsorbent Characterizationmentioning

confidence: 99%

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Halloysite Nanotubes as an Effective and Recyclable Adsorbent for Removal of Low-Concentration Antibiotics Ciprofloxacin

Cheng

Liu

et al. 2018

Minerals

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In this work, halloysite nanotubes (HNTs) without modification were used as an efficient adsorbent to explore its natural adsorption capability, which showed excellent adsorption ability for low-concentration ciprofloxacin (CIP). The physicochemical properties of HNTs before and after adsorption were investigated by several characterization techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), N 2 adsorption-desorption analysis, X-ray diffractometer (XRD), and zeta potential analysis. The influences of temperature, initial CIP concentration, adsorbent dosage, and pH value on CIP adsorption performance were also studied. The kinetics analysis revealed that CIP adsorption on HNTs was a kind of monolayer adsorption process and followed a pseudo-second-order rate equation. The zeta potential result indicated that electrostatic interaction between HNTs and CIP molecules was possibly responsible for the adsorption performance. Moreover, HNTs showed no apparent loss in CIP adsorption capability after five cycles, exhibiting potential applications in wastewater treatment. excellent adsorption characteristics is widely used as an adsorbent. However, its high cost restricts its commercial application. In contrast to active carbon, clays are considered to be promising adsorbent candidates because of their lost cost, wide availability, and high adsorption efficiency [14].Halloysite [Al 2 Si 2 O 5 (OH) 4 ·2H 2 O], a type of natural aluminosilicate clay mineral that is widely widespread in China [15], has a similar structure to kaolin, except that a monolayer of water molecules intercalates between the adjacent clay layers [16]. The sizes and polydispersity of halloysite depends on the specific geological deposit [17]. Halloysite nanotubes (HNTs) with negative charges on outer surface are a kind of outstanding hollow tubular material with an internal diameter of 20-30 nm and an external diameter from 30 to 70 nm [18,19], which exhibits excellent physical and chemical properties due to their large specific surface areas, abundant hydroxyl groups, porous structure, and great biocompatibility. HNTs are not toxic to humans [20,21], which represents a prerequisite for pharmaceutical and biomedical applications [22,23]. Most importantly, HNTs have been widely investigated as adsorbents for the removal of dyes and heavy metals in wastewater [24][25][26].Herein, we used HNTs without any modification as adsorbent to investigate its natural adsorption performance toward CIP. The effects of various experiment conditions on adsorption capacity were thoroughly investigated, and pH value played an important role in regulating the adsorption efficiency. Furthermore, the adsorption kinetics and adsorption characteristics were discussed. The pseudo-second-order kinetic model fitted the data well and the equilibrium adsorption data were well described by the Langmuir isotherm model. It was found that the structure and surface property of HNTs were the k...

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Section: Adsorbent Characterizationmentioning

confidence: 99%

Section: Adsorbent Characterizationmentioning

confidence: 99%

Halloysite Nanotubes as an Effective and Recyclable Adsorbent for Removal of Low-Concentration Antibiotics Ciprofloxacin

Cheng

Liu

et al. 2018

Minerals

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“…The third mass loss, in the range of 600 to 700°C, corresponds to the final degradation of lignin and final structure of the adsorbent(TONGPOOTHORN et al, 2011). This behavior with three mass loss intervals was also observed in adsorbents from rice husks(Suzuki et al, 2007), wood sawdust(SEO et al, 2010), wheat straw(Nani et al, 2010), cashew leaves (PEREIRA, 2017) and peanut hulls(SILVA et al, 2018).…”

mentioning

confidence: 74%

Production and Characterization of Activated Biochar of Cássia Fistula L. Leaves

Tomassoni

Schneider

Giroletti

et al. 2020

R. gest. sust. ambient.

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A new activated biochar was produced by carbonizing Cássia fistula L. leaves and its characterization was performed. Scanning Electron Microscopic (SEM) images of the activated biochar showed morphology with numerous irregular cavities and pores. BET surface area and total pore volume of produced adsorbent were 192 m².g-1 and 0.108 cm3.g-1, respectively. Mean porous diameter of the produced biochar was 2.263 nm, characterizing a mesoporous material. Crystallinity and functional groups of the adsorbent were determined by X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) spectroscopy analyses, respectively. The pH of zero charge point (pHzcp) observed was equal to 10, demonstrating that the activated biochar has a negative surface, which facilitates the adsorption of positively charged compounds in water and wastewater treatment. Tree leaves of Cássia fistula L. represent a promising raw material for activated biochar production, given their availability and characteristics of the adsorbent produced. The use of tree leaves for activated biochar production can reduce the operational costs of adsorption process, besides providing the use of a residue for a more noble purpose.

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“…Observou-se que a maior capacidade de adsorção ocorreu em pH 4,0, sendo este pH considerado para estudos posteriores, pois pode ter provocado uma maior protonação da superfície do adsorvente proporcionando um aumento na adsorção de espécies aniônicas do AMe por interações eletrostáticas. No entanto, o aumento do pH proporcionou diminuição na adsorção do corante AMe devido à diminuição destas interações e aumento das ligações de hidrogênio e interações de van der Waals [46]. Estas evidências foram suportadas pela análise do ponto de carga zero (pH pzc ) dos microcristais de h-MoO 3 ; como pode ser visualizado na Fig.…”

Section: Estudo De Adsorçãounclassified

“…10, pode-se observar que o equilíbrio entre o adsorvente e adsorvato foi atingido em torno de 960 min, pois a quantidade adsorvida de AMe permaneceu praticamente constante a partir deste tempo, que foi considerado para estudos posteriores. Com intuito de investigar a cinética e mecanismo de adsorção que determinaram o processo de adsorção, os dados obtidos experimentalmente através deste estudo foram submetidos a cálculos matemáticos utilizando diferentes modelos cinéticos [46]. Com base na Tabela V, que mostra os parâmetros obtidos com o ajuste aos diferentes modelos cinéticos para o sistema em estudo, observou-se que o maior valor do coeficiente de correlação (R 2 =0,9997) foi obtido utilizando o modelo de pseudossegunda ordem quando comparado com os outros modelos.…”

Section: Estudo De Adsorçãounclassified

Remoção do alaranjado de metila em meio aquoso por microcristais de h-MoO3 obtidos pelo método micro-ondas hidrotérmico

Sá

Nobre²,

Matos

et al. 2020

Cerâmica

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Resumo Nos últimos anos aumentou o interesse em lidar com o crescente problema ambiental proveniente da poluição de águas residuais oriundas das fábricas industriais. Visando minimizar esse impacto ambiental, a técnica de adsorção em meio aquoso tem sido uma alternativa bastante explorada na atualidade. Portanto, este trabalho teve como objetivo investigar a capacidade adsortiva de microcristais de trióxido de molibdênio (h-MoO3) usando o corante alaranjando de metila (AMe) como molécula em meio aquoso. Os microcristais foram obtidos por micro-ondas hidrotermal e estruturalmente caracterizados por diversas técnicas. O estudo cinético na adsorção do AMe resultou no melhor ajuste quando adotado o modelo de pseudossegunda ordem (R2=0,9997). O estudo da variação de temperatura indicou que a adsorção foi um processo favorável e espontâneo. Os valores obtidos tiveram boa concordância com o modelo de isoterma de Temkin, com capacidade máxima de adsorção de 656,9 mg.g-1 a 318 K.

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Potential of amino-functionalized cellulose as an alternative sorbent intended to remove anionic dyes from aqueous solutions

Cited by 41 publications

References 94 publications

Halloysite Nanotubes as an Effective and Recyclable Adsorbent for Removal of Low-Concentration Antibiotics Ciprofloxacin

Halloysite Nanotubes as an Effective and Recyclable Adsorbent for Removal of Low-Concentration Antibiotics Ciprofloxacin

Production and Characterization of Activated Biochar of Cássia Fistula L. Leaves

Remoção do alaranjado de metila em meio aquoso por microcristais de h-MoO3 obtidos pelo método micro-ondas hidrotérmico

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