Adsorption of naphthenic acids from oil sand process‐affected water with water‐insoluble poly(<i>β</i>‐cyclodextrin‐citric acid)

Liang, Hao; Zou, Changjun

doi:10.1002/cjce.23452

Cited by 15 publications

(3 citation statements)

References 37 publications

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“…Among them, the pseudo-first-order and pseudo-second-order kinetic models are the most widely used . The mathematical expression of the model is as follows ln ( Q e , 1 − Q t ) = ln nobreak0em0.25em⁡ Q normale , 1 − k 1 × t t Q t = 1 Q e , 2 t + 1 k 2 Q normale , 2 2 Equations and are pseudo-first-order and pseudo-second-order kinetic models, respectively. Q e,1 (mg/g) and Q e,2 (mg/g) represent the pseudo-first-order and pseudo-second-order kinetic fitted equilibrium adsorption capacities, respectively, k 1 (min –1 ) and k 2 (mg/g·min) denote the pseudo-first-order kinetic and pseudo-second-order kinetic adsorption rate constants, respectively, and Q t (mg/g) is the adsorption capacity at any time.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Nonionic Acidizing Retarder AAO for Reservoir Stimulation

Chen,

Quan,

Huang

et al. 2023

ACS Omega

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In the process of matrix acidizing, reducing the reaction rate between hydrochloric acid and carbonate rock to increase oil and gas production has become one of the biggest challenges in reservoir stimulation. An adsorption film formed on rocks can effectively postpone the contact between the hydrogen ion and rock, which is of great significance in decreasing the rate of an acid−rock reaction. In this study, nonionic acidizing retarder AAO was synthesized by acrylamide, allyl poly(ethylene glycol), and octadecyl methacrylate. The structure of AAO was characterized by Fourier transform infrared (FT-IR) spectrometry and 1 H nuclear magnetic resonance ( 1 H NMR). The reaction of AAO retard acid and 20% hydrochloric acid with CaCO 3 was studied at 50 °C, and the amount of CO 2 generated at different times was recorded. The etching time of 0.8% AAO retard acid to CaCO 3 could be up to 120 min, whereas 20% hydrochloric acid (without AAO) ended at 45 min, which showed that AAO had the potential to defer the acid−rock reaction. The adsorption behavior of AAO on CaCO 3 matched the pseudo-second-order kinetic model well. Meanwhile, the addition of urea greatly reduced the adsorption amount of AAO on CaCO 3 , which showed that the hydrogen bond was the driving force for the adsorption process. Additionally, the results of X-ray photoelectron spectroscopy (XPS) showed that the N element from acrylamide appeared on the surface of CaCO 3 after adsorption. Scanning electron microscopy (SEM) demonstrated that a smooth and dense thin film existed on the surface of CaCO 3 treated with AAO retard acid. The change in the vibration peak of C�O from 1720 to 1650 cm −1 indicated that the ester groups in AAO had been hydrolyzed, which was beneficial to film desorption and the reduction of reservoir damage. Therefore, this paper could help with research on carbonate acidizing for reservoir stimulation.

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Section: Resultsmentioning

confidence: 99%

Investigation of the Nonionic Acidizing Retarder AAO for Reservoir Stimulation

Chen,

Quan,

Huang

et al. 2023

ACS Omega

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“…It is now widely used in food packaging, bioengineering, and wastewater treatment [10][11][12]. Liang et al [13] prepared water-insoluble supramolecular polymeric adsorbents using PVA as the main chain in combination with CA and β-CD for the treatment of naphthenic-acid-containing oil sand process wastewater. Yu et al [14] prepared ionimprinted composite hydrogel materials with PVA as the main non-toxic component and CA as the cross-linker to enhance the stability of ion-imprinted pores.…”

Section: Introductionmentioning

confidence: 99%

Polyvinyl Alcohol–Citric Acid: A New Material for Green and Efficient Removal of Cationic Dye Wastewater

He,

Zheng,

Liu

et al. 2023

Polymers

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The citric acid (CA) cross-linked polyvinyl alcohol (PVA) adsorbent, PVA–CA, was efficiently synthesized and its application to the removal of dyes in water, particularly the cationic dye, methylene blue (MB), was thoroughly investigated. The morphologies and physiochemical characteristics of PVA–CA were fully characterized by SEM, FT-IR, XRD, TGA, BET, and XPS. The effects of contact time, adsorbent dosage, MB concentration, solution pH, and temperature on the adsorption performance were compared using controllable methods. The maximum adsorption capacity of PVA–CA was 709.86 mg g−1 and the removal rate remained high through several adsorption–desorption cycles, demonstrating that such a composite absorbent has a good adsorption performance and recoverability. Further analysis by the density functional theory (DFT) showed that van der Waals interactions, electrostatic interactions and hydrogen bonding interactions between PVA–CA and MB played significant roles in the adsorption mechanism.

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“…Cyclodextrin nanosponges crosslinked with citric acid in the presence of poly(vinyl alcohol) was investigated in a previous study so as to elaborate an efficient adsorbent of cyclodextrin nanosponges that were applied to the adsorption of phenol and methylene blue [ 78 ] and aniline extraction [ 79 ] and the removal of naphthenic acids [ 80 ]. Nevertheless, this type of nanosponge has never been declared for PQ adsorption.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Paraquat by Poly(Vinyl Alcohol)-Cyclodextrin Nanosponges

2021

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The contamination of hydrosoluble pesticides in water could generate a serious problem for biotic and abiotic components. The removal of a hazardous agrochemical (paraquat) from water was achieved by adsorption processes using poly(vinyl alcohol)-cyclodextrin nanosponges, which were prepared with various formulations via the crosslinking between citric acid and β-cyclodextrin in the presence of poly(vinyl alcohol). The physicochemical properties of nanosponges were also characterized by different techniques, such as gravimetry, thermogravimetry, microscopy (SEM and Stereo), spectroscopy (UV-visible, NMR, ATR-FTIR, and Raman), acid-base titration, BET surface area analysis, X-ray diffraction, and ion exchange capacity. The C10D-P2 nanosponges displayed 60.2% yield, 3.14 mmol/g COOH groups, 0.335 mmol/g β-CD content, 96.4% swelling, 94.5% paraquat removal, 0.1766 m2 g−1 specific surface area, and 5.2 × 10−4 cm3 g−1 pore volume. The presence of particular peaks referring to specific functional groups on spectroscopic spectra confirmed the successful polycondensation on the reticulated nanosponges. The pseudo second-order model (with R2 = 0.9998) and Langmuir isotherm (with R2 = 0.9979) was suitable for kinetics and isotherm using 180 min of contact time and a pH of 6.5. The maximum adsorption capacity was calculated at 112.2 mg/g. Finally, the recyclability of these nanosponges was 90.3% of paraquat removal after five regeneration times.

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Adsorption of naphthenic acids from oil sand process‐affected water with water‐insoluble poly(β‐cyclodextrin‐citric acid)

Cited by 15 publications

References 37 publications

Investigation of the Nonionic Acidizing Retarder AAO for Reservoir Stimulation

Investigation of the Nonionic Acidizing Retarder AAO for Reservoir Stimulation

Polyvinyl Alcohol–Citric Acid: A New Material for Green and Efficient Removal of Cationic Dye Wastewater

Adsorption of Paraquat by Poly(Vinyl Alcohol)-Cyclodextrin Nanosponges

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