Phosphorus removal and recovery from water with macroporous bead adsorbent constituted of alginate-Zr4+ and PNIPAM-interpenetrated networks

Luo, Huayong; Zeng, Xueyang; Liao, Peng; Rong, Hongwei; Zhang, Tian C.; Zhang, Z. Jason; Meng, Xiangchao

doi:10.1016/j.ijbiomac.2018.12.269

Cited by 78 publications

(42 citation statements)

References 41 publications

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“…Interestingly, the Cu(II) adsorption capacity of these three kinds of hydrogels stayed relatively stable (around 140 mg/g). This result indicated that the molar ratio of the monomers did not affect the adsorption capacity significantly, while increasing the amount of AMPS could enhance the swelling performance of the hydrogel, which was probably due to the hydrophilic role of -SO 3 H. As a lower swelling ratio value of the hydrogel contributed to a better mechanical property and could benefit the reusability of the adsorbents (Luo et al 2019), the P(AMPSco-VDT) hydrogel with an AMPS to VDT molar ratio of 3:2 was used in further experiments.…”

Section: Characterization Of Hydrogelsmentioning

confidence: 87%

A novel hydrogel for highly efficient adsorption of Cu(II): synthesis, characterization, and mechanisms

Wan

Chen

et al. 2020

Environ Sci Pollut Res

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Among the Cu(II) removal methods, adsorption is a favorable technique and has attracted large attention because of its effectiveness and low cost. In quest of seeking for a favorable adsorbent with a high Cu(II) adsorption capacity and excellent reusability, researchers have paid much attention to hydrogels with three-dimensional networks. In this study, a novel hydrogel (P(AMPS-co-VDT) hydrogel) based on free-radical polymerization was synthesized with ionic monomer sodium 2-acrylamido-2-methylpropane sulfate (AMPS-Na +) and 2-vinyl-4, 6-diamino-1, 3, 5-triazine (VDT) and applied for Cu(II) adsorption in aqueous solutions. The hydrogel was characterized for swelling performance, surface morphology, functional groups, thermal gravimetric behavior, and elements. The maximum Cu(II) adsorption capacity (175.75 mg/g) was relatively high compared with other hydrogels. The P(AMPS-co-VDT) hydrogel also was found to have a relatively good Cu(II) desorption and reuse behavior. The adsorption mechanism could be chelation and ion exchange. This work provides a new hydrogel for effective Cu(II) removal in the future.

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Section: Characterization Of Hydrogelsmentioning

confidence: 87%

A novel hydrogel for highly efficient adsorption of Cu(II): synthesis, characterization, and mechanisms

Wan

Chen

et al. 2020

Environ Sci Pollut Res

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“…The thermogravimetric analysis (TGA) and differential thermogravimetry (DTG) were carried out by thermogravimetric analyzer (TA-60Ws, Japan) in nitrogen atmosphere under a heating rate of 10°C/ min varying from room temperature to 800°C. The point of zero charge (pH pzc ) for the hydrogels was determined by the pH shift method [9,11,29]. The initial pH (pH i ) and final pH (pH f ) were determined by a pH electrode (PB-10, Sartorius, Germany).…”

Section: Materials Characterizationmentioning

confidence: 99%

“…KH 2 PO 4 was used to prepare the phosphate solution with the concentration based on phosphorus only. The phosphate concentration was determined by the ammonium molybdate spectrophotometric method [11]. The tubes were placed in a temperature-controlled shaker (THZ-82A, Kexing, China) to vibrate at 140 rpm for 24 h. The adsorption capacity of the hydrogel was evaluated using Eq.…”

Section: Batch Studiesmentioning

confidence: 99%

“…Thus, it is necessary to find a simple and effective method to remove and recycle phosphorus from wastewater [3,4]. At present, various technologies for removing phosphorus from aqueous solutions have been developed, such as membrane filtration [5], ion exchange [6], chemical precipitation [7], biological removal [8], and adsorption [9][10][11]. Among these methods, adsorption is considered as an attractive alternative due to its simple operation, low cost, steady phosphorus removal, and potential for phosphorus recovery [12].…”

Section: Introductionmentioning

confidence: 99%

“…Among these methods, adsorption is considered as an attractive alternative due to its simple operation, low cost, steady phosphorus removal, and potential for phosphorus recovery [12]. To date, a variety of adsorbents such as clay mineral [13], industrial byproduct [14], synthetic metal oxide/hydroxide nanomaterials [8,15] and bio-polymer beads [3,[9][10][11] have been explored and applied for the adsorptive removal and recovery of phosphorus from polluted water. However, the aforementioned adsorption methods usually need strong alkaline solutions (NaOH) to desorb phosphate ions from the phosphate-loaded adsorbents for the regeneration.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temperature-induced adsorption and desorption of phosphate on poly(acrylic acid-co-N-[3-(dimethylamino)propyl]acrylamide) hydrogels in aqueous solutions

BaiYou¹,

Luo²,

Rong³

et al. 2019

Desalination and Water Treatment

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We explore the feasibility of using thermosensitive hydrogels based on copolymers of acrylic acid (AAC) and N-[3-(dimethylamino)propyl] acrylamide (DMAPAA) [P(AAC-co-DMAPAA)] for adsorption and desorption of phosphate in aqueous solutions by a temperature swing. The hydrogels were protonated when they swelled in acidic solution at room temperature, exhibiting good adsorption capacity of phosphate. The phosphate ions were desorbed at high temperature due to the ionic repulsion of carboxyl groups caused by the dissociation of hydrogen bonding. The hydrogels were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The effects of solution pH and temperature on phosphate removal were investigated. Kinetic data revealed that the adsorption of phosphate fitted the pseudo-first-order model. Isotherm data showed that the Freundlich model was more suitable than the Langmuir model. Effective desorption of phosphate was observed by raising the solution temperature to 55°C, and repeated adsorption and desorption behaviors were achieved within three consecutive cycles by a temperature swing between 25°C and 55°C. These findings suggest the possible phosphate removal and recovery from aqueous solutions by changing the environmental temperature.

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Strength modification of sodium alginate–polyvinyl alcohol gel beads and efficient aqueous phase phosphorus removal

Ma,

Huo,

Xiao

et al. 2023

Polym. Bull.

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Phosphorus removal and recovery from water with macroporous bead adsorbent constituted of alginate-Zr4+ and PNIPAM-interpenetrated networks

Cited by 78 publications

References 41 publications

A novel hydrogel for highly efficient adsorption of Cu(II): synthesis, characterization, and mechanisms

A novel hydrogel for highly efficient adsorption of Cu(II): synthesis, characterization, and mechanisms

Temperature-induced adsorption and desorption of phosphate on poly(acrylic acid-co-N-[3-(dimethylamino)propyl]acrylamide) hydrogels in aqueous solutions

Strength modification of sodium alginate–polyvinyl alcohol gel beads and efficient aqueous phase phosphorus removal

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