Behavior and Mechanism of Tannic Acid Adsorption on the Calcite Surface: Isothermal, Kinetic, and Thermodynamic Studies

Tangarfa, Mariam; Hassani, Naoual Semlali Aouragh; Alaoui, Abdallah

doi:10.1021/acsomega.9b02259

Cited by 34 publications

(17 citation statements)

References 55 publications

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“…[ 32 ] In addition, TA@HAP NWs have phenolic‐OH groups and –OH groups of hydroxyapatite in the range of 3600–3000 cm −1 . [ 31b,32,33 ] All these peaks show that TA has been successfully wrapped on HAP NWs. Next, TA@HAP NWs, PVA and AlCl 3 powder were added to the pre‐prepared binary solvent of EG and water, and stirred at 95 °C for 4 h. AlCl 3 can be completely ionized in water, but not in EG, which helps Al 3+ move freely in the molecular level ion water channel separated by EG molecules.…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Ionic Skin with Sensing, UV‐Filtering, Water‐Retaining, and Anti‐Freezing Capabilities

Wen

Tang

et al. 2021

Adv Funct Materials

263

171

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Conductive polymer hydrogels are receiving considerable attention in applications such as soft robots and human-machine interfaces. Herein, a transparent and highly ionically conductive hydrogel that integrates sensing, UV-filtering, water-retaining, and anti-freezing performances is achieved by the organic combination of tannic acid-coated hydroxyapatite nanowires (TA@HAP NWs), polyvinyl alcohol (PVA) chains, ethylene glycol (EG), and metal ions. The highly ionic conductivity of the hydrogel enables tensile strain, pressure, and temperature sensing capabilities. In particular, in terms of the hydrogel strain sensors based on ionic conduction, it has high sensitivity (GF = 2.84) within a wide strain range (350%), high linearity (R 2 = 0.99003), fast response (≈50 ms) and excellent cycle stability. In addition, the incorporated TA@HAP NWs act as a nano-reinforced filler to improve the mechanical properties and confer a UV-shielding ability upon the hydrogel due to its size effect and the characteristics of absorbing ultraviolet light waves, which can reflect and absorb short ultraviolet rays and transmit visible light. Meanwhile, owing to the water-locking effect between EG and water molecules, the hydrogel exhibits freezing resistance at low temperatures and moisture retention at high temperatures. This biocompatible and multifunctional conductive hydrogel provides new ideas for the design of novel ionic skin devices.

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Section: Resultsmentioning

confidence: 99%

Multifunctional Ionic Skin with Sensing, UV‐Filtering, Water‐Retaining, and Anti‐Freezing Capabilities

Wen

Tang

et al. 2021

Adv Funct Materials

263

171

View full text Add to dashboard Cite

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“…Tannin has a strong aqueous solubility below pH. Over the pH, the solubility of tannin decreases with increasing pH, which may diminish the binding of the suspended and organic particles and therefore decrease the removal of BOD, COD, turbidity, and SS removal from PORE [22,23]. pH influences the prominence of the most chemical reactions in the aquatic environment [17].…”

Section: Treatment Of Pore Using Tannin As a Coagulantmentioning

confidence: 99%

Treatment of Palm Oil Refinery Effluent Using Tannin as a Polymeric Coagulant: Isotherm, Kinetics, and Thermodynamics Analyses

et al. 2020

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The refining of the crude palm oil (CPO) generates the palm oil refinery effluent (PORE). The presence of high contents of biochemical oxygen demand (BOD), chemical oxygen demand (COD), turbidity, and suspended solids (SS) in PORE encourages the determination of an effective treatment process to minimize the environmental pollution and preserve aquatic life. In the present study, a biodegradable natural polymer, namely tannin, was utilized as a coagulant to treat PORE. The coagulation experiment was conducted using a jar test apparatus. The tannin coagulation efficiency was evaluated based on the BOD, COD, turbidity, and SS removal from PORE by varying the tannin dose (50–300 mg/L), pH (pH 4–10), treatment time (15–90 min), and sedimentation time (15–90 min). It was found that the maximum removal of BOD, COD, turbidity, and SS was 97.62%, 88.89%, 93.01%, and 90.21%, respectively, at pH 6, a tannin dose of 200 mg/L, 60 min of coagulation time, and 60 min of sedimentation time. Analyses of isotherm models revealed that the Freundlich isotherm model was well fitted with the coagulation study. Kinetics studies show that the pseudo-second-order kinetics model was the well-fitted kinetics model for the BOD, COD, turbidity, and SS removal from PORE using tannin as a polymeric coagulant. The determination of thermodynamics parameters analyses revealed that BOD, COD, turbidity, and SS removal from PORE was spontaneous, exothermic, and chemical in nature. The finding of the present study shows that tannin as a natural polymeric coagulant would be utilized in PORE treatment to avoid toxic sludge generation.

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“…To better demonstrate the excellent adsorption properties of HP-MIL-101, a more comprehensive comparison of the rate constant and adsorption capacity for the removal of TA with other materials reported in the literature is given in Table 3. 32,[37][38][39][40][41][42][43][44] It can be clearly seen that HP-MIL-101-30 displays a much higher adsorption rate than most reported materials at the same or even lower adsorbent dosage/TA concentration.…”

Section: Ta Adsorption Performancementioning

confidence: 85%

Rapid construction of hierarchically porous metal–organic frameworks by a spray‐drying strategy for enhanced tannic acid adsorption

et al. 2021

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Metal-organic frameworks (MOFs) have attracted much attention owing to their tailored pore environment and surface functionality. However, most of the currently reported MOFs are confined to small pore sizes (<5 nm), limiting their practical applications. Here, a facile and versatile strategy for rapid construction of hierarchically porous MOFs (HP-MOFs) by spray-drying is reported, in which presynthesized nanosized MOFs (N-MOFs) can be assembled to form MOF microspheres with meso/macropores resulting from the interspace among closely arranged N-MOFs. This strategy enables the construction of multicomponent HP-MOFs with various functions. As a proof of concept, we show that the adsorption for tannic acid (TA) can be significantly enhanced using HP-MIL-101(Cr). Particularly, HP-MIL-101-30 (30 represents the primary nanoparticle size) exhibits a record-high adsorption capacity (1175 mg g À1 ), and the adsorption rate of HP-MIL-101-30 is increased by 50% compared to that of N-MIL-101-30. These findings have important implications for the rapid construction of HP-MOFs, which is beneficial for the adsorption of large molecules.

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Behavior and Mechanism of Tannic Acid Adsorption on the Calcite Surface: Isothermal, Kinetic, and Thermodynamic Studies

Cited by 34 publications

References 55 publications

Multifunctional Ionic Skin with Sensing, UV‐Filtering, Water‐Retaining, and Anti‐Freezing Capabilities

Multifunctional Ionic Skin with Sensing, UV‐Filtering, Water‐Retaining, and Anti‐Freezing Capabilities

Treatment of Palm Oil Refinery Effluent Using Tannin as a Polymeric Coagulant: Isotherm, Kinetics, and Thermodynamics Analyses

Rapid construction of hierarchically porous metal–organic frameworks by a spray‐drying strategy for enhanced tannic acid adsorption

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