Reuse of a waste adsorbent poly(AAc/AM/SH)‐Cu superabsorbent hydrogel, for the potential phosphate ion removal from waste water: Matrix effects, adsorption kinetics, and thermodynamic studies

Singh, Tripti; Singhal, Reena

doi:10.1002/app.39018

Cited by 40 publications

(23 citation statements)

References 40 publications

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“…6 The nondestructive adsorption method is considered to be one of the most effective measures with its low energy consumption for the treatment of contaminants. 7 from aquatic solutions, such as the hypercrosslinked resins, aminated polystyrene resins, macroporous resins, microporous resins, and magnetic resins. [24][25][26][27][28][29] Butler et al 30 chose a series of neutral and anion-exchange polymers to remove nalidixic acid.…”

Section: Introductionmentioning

confidence: 99%

Macroporous polystyrene resins as adsorbents for the removal of tetracycline antibiotics from an aquatic environment

Chao

Zhu

Yan

et al. 2014

J of Applied Polymer Sci

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Six macroporous polystyrene resins (strong‐acid resins D001, D061, D072, and NKC‐9, strong‐base resin D201, and alkalescent resin D370) were selected as adsorbents for removing tetracycline (TC) and doxycycline hydrochloride (DC) from aqueous solutions. The solution pH and ionic strength had significant effects on the sorption of TC and DC. The basic resins D201 and D370 exhibited strong sorption capabilities (70.08–105.60 mg/g) at pH 4–9, but strong‐acid resins showed good sorption abilities only under acidic conditions of pH 2–3 (83.30–95.78 mg/g). The inhibitory effect of the ionic strength was much weaker for D370 than for D201. The adsorption ratio of TC and DC on D201 and D370 were all above 90% when the amount of adsorbent exceeded 50 mg. By performing kinetic experiments, we determined that the pseudo‐second‐order model fit the data best for DC sorption on the six resins and TC sorption on D201 and D370, but the pseudo‐first‐order model fit the data of TC sorption on the four strong‐acid resins better at pH 7.0. Intraparticle diffusion was not the only rate‐controlling step, and an initial external mass transfer or chemical reaction might have existed in the sorption process. The Langmuir equation was the best isotherm equation to describe the sorption with a monolayer sorption maximum larger than 98.04 mg/g under all temperatures. Thermodynamic studies showed that the sorption of TC and DC on the resins was thermodynamically feasible and spontaneous. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40561.

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Section: Introductionmentioning

confidence: 99%

Macroporous polystyrene resins as adsorbents for the removal of tetracycline antibiotics from an aquatic environment

Chao

Zhu

Yan

et al. 2014

J of Applied Polymer Sci

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“…To evaluate the rate of water absorbency of mCS‐PEG gel beads, swelling experimental data were implemented to fit with pseudo‐first‐order and pseudo‐second‐order kinetic models. The kinetic model's expressions as follows:

normalln (|, S_{normale} - S_{t}) = normalln S_{normale} - K_{1} t

\frac{t}{S_{t}} = \frac{1}{K_{2} . S_{normale}^{2}} + \frac{t}{S_{normale}}

where

S_{normale}

and

S_{t}

are the swelling magnitude of magnetic gel beads at swelling equilibrium and at contact time

t

(min) with water, respectively.

K_{1}

(min −1 ) and

K_{2}

(g/g.…”

Section: Resultsmentioning

confidence: 99%

“…To evaluate the rate of water absorbency of mCS-PEG gel beads, swelling experimental data were implemented to fit with pseudo-first-order and pseudo-second-order kinetic models. The kinetic model's expressions as follows 38 :…”

Section: Swelling Kinetic Analysismentioning

confidence: 99%

Magnetic iron oxide nanoparticles (MIONs) cross‐linked natural polymer‐based hybrid gel beads: Controlled nano anti‐TB drug delivery application

Kesavan¹,

Ayyanaar²,

Vijayakumar

et al. 2017

J Biomedical Materials Res

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The nanosized rifampicin (RIF) has been prepared to increase the solubility in aqueous solution, which leads to remarkable enhancement of its bioavailability and their convenient delivery system studied by newly produced nontoxic, biodegradable magnetic iron oxide nanoparticles (MIONs) cross-linked polyethylene glycol hybrid chitosan (mCS-PEG) gel beads. The functionalization of both nano RIF and mCS-PEG gel beads were studied using various spectroscopic and microscopic techniques. The size of prepared nano RIF was found to be 70.20 ± 3.50 nm. The mechanical stability and swelling ratio of the magnetic gel beads increased by the addition of PEG with a maximum swelling ratio of 38.67 ± 0.29 g/g. Interestingly, this magnetic gel bead has dual responsive assets in the nano drug delivery application (pH and the magnetic field). As we expected, magnetic gel beads show higher nano drug releasing efficacy at acidic medium (pH = 5.0) with maximum efficiency of 71.00 ± 0.87%. This efficacy may also be tuned by altering the external magnetic field and the weight percentage (wt%) of PEG. These results suggest that such a dual responsive magnetic gel beads can be used as a potential system in the nano drug delivery applications. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1039-1050, 2018.

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“…In general, the spherical shaped polymer system with

M_{normalt} / M_{normale}

≤ 60%, the diffusion mechanism is mainly depends on the value of

n

. The value of

n

≤ 0.43, 0.43 <

n

< 0.85,

n

= 0.85, and

n

> 0.85 corresponds to Fickian transport, non‐Fickian transport, case II transport, and Super case II transport mechanism, correspondingly . The linear analysis of

normallog (|, M_{normalt} / M_{normale})

versus

normallog (|, t)

offered the value of

n

and

k

as slope and intercept, separately (Fig.…”

Section: Resultsmentioning

confidence: 99%

One pot synthesis of new poly(vinyl alcohol) blended natural polymer based magnetic hydrogel beads: Controlled natural anticancer alkaloid delivery system

Kesavan¹,

Ayyanaar²,

Lenin³

et al. 2017

J Biomedical Materials Res

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Facile one-pot synthesis has been demonstrated for new biocompatible and dual responsive magnetic iron oxide nanoparticles cross-linked poly(vinyl alcohol) (PVA) blended natural polymer chitosan (CS) based hydrogel beads (mCS-PVA) as a controlled natural anticancer alkaloid Luotonin A (LuA) delivery system. The prepared magnetic hydrogel beads were characterized using powder X-ray diffraction measurement, Fourier transform-infrared spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and vibrating sample magnetometer. The magnetic hydrogel beads are exhibited significant water retention and follow the second order kinetic model in swelling study. The swelling ratio of the magnetic gel beads increased by the addition of PVA and showed a maximum swelling ratio of 40.83 ± 1.01 g/g and follows non-Fickian water transport mechanism. Stimuli responsive mCS and mCS-PVA hydrogel beads functionalized with LuA is demonstrated for controlled release at physiological pH and under magnetic field. The magnetic hydrogel beads show highest LuA releasing efficacy at acidic medium (pH = 5.0) with maximum efficiency of 73.33 ± 1.44%. This efficacy may also be tuned by altering the external magnetic field as well as the weight percentage (wt %) of polyethylene glycol. It is clearly that the newly produced magnetic hydrogel beads can be served as an effective intestinal LuA delivery system. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 543-551, 2018.

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Reuse of a waste adsorbent poly(AAc/AM/SH)‐Cu superabsorbent hydrogel, for the potential phosphate ion removal from waste water: Matrix effects, adsorption kinetics, and thermodynamic studies

Cited by 40 publications

References 40 publications

Macroporous polystyrene resins as adsorbents for the removal of tetracycline antibiotics from an aquatic environment

Macroporous polystyrene resins as adsorbents for the removal of tetracycline antibiotics from an aquatic environment

Magnetic iron oxide nanoparticles (MIONs) cross‐linked natural polymer‐based hybrid gel beads: Controlled nano anti‐TB drug delivery application

One pot synthesis of new poly(vinyl alcohol) blended natural polymer based magnetic hydrogel beads: Controlled natural anticancer alkaloid delivery system

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