Removal of Cu(II) ions from aqueous streams using poly(acrylic acid-co-acrylamide) hydrogels

Orozco-Guareño, Eulogio; Santiago-Gutiérrez, Fernanda; Morán-Quiroz, José Luis; Hernandez-Olmos, Saira Lizette; Soto, Victor; Cruz, W. de la; Manríquez, Ricardo; Gómez-Salazar, Sergio

doi:10.1016/j.jcis.2010.05.048

Cited by 113 publications

(62 citation statements)

References 37 publications

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“…The C%/N% ratios measured in poly(HAc-co-Am) hydrogels were significantly different from the theoretical values. 8 For example, the C%/N% theoretical value for a hydrogel with 75:25 HAc:Am was 8.54 versus the experimental value of 10.44. 8 Fourier transform infrared (FTIR) spectroscopy is one of the most widely employed techniques for analyzing polymeric materials.…”

Section: Introductionmentioning

confidence: 95%

“…8 For example, the C%/N% theoretical value for a hydrogel with 75:25 HAc:Am was 8.54 versus the experimental value of 10.44. 8 Fourier transform infrared (FTIR) spectroscopy is one of the most widely employed techniques for analyzing polymeric materials. 19 It is a suitable tool to characterize crosslinked materials, such as hydrogels, taking into account that it is not necessary to dissolve the material, and in this case, impossible to achieve in a non-destructive way.…”

Section: Introductionmentioning

confidence: 95%

“…8,10 In both cases, carbon and nitrogen percentages are those employed in the calculation. Nitrogen is an element from acrylamide while carbon is from all the monomers (acrylamide and acrylic acid or acrylate) and also from the cross-linking agent.…”

Section: Introductionmentioning

confidence: 99%

“…For hydrogels based on acrylic acid or acrylate and acrylamide, FTIR has been used to: confirm the presence of monomers and crosslinker in the copolymer chemical structure; 5,12,14,15 to verify the partial neutralization of acrylic acid monomer; 10 to corroborate intercalation onto silicate layers; 11 and to investigate intermolecular interaction between metal ions and hydrogel functional groups. 3,8 The degree of hydrolysis of polyacrylamide hydrogels was also roughly calculated by FTIR spectroscopy. 18 Since ionic content is one of the most important parameters that affect swelling, knowledge of the real acrylamide/acrylate ratio in these hydrogels is a subject of interest.…”

Section: Introductionmentioning

confidence: 99%

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Application of ftir in the determination of acrylate content in poly(sodium acrylate-co-acrylamide) superabsorbent hydrogels

Magalhães¹,

Neto²,

Bezerra³

et al. 2012

Quím. Nova

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Recebido em 25/11/11; aceito em 30/1/12; publicado na web em 15/6/12 Hydrogels have been prepared by free-radical solution copolymerization of acrylamide and sodium acrylate (NaAc), with molar ratio ranging from 25/75 to 80/20, respectively, using methylene bisacrylamide as the crosslinking agent. A FTIR spectroscopy procedure to determine the acrylate/acrylamide ratio in these hydrogels was proposed based on absorbance at 1410 cm -1 (nCOO -) and 2940 cm -1 (nCH and nCH 2 ). A straight line with a good linear correlation coefficient (0.998) was obtained by plotting the acrylate content (Ac%) versus relative absorbance (A rel = A 1410 /A 2940 ). Results were confirmed by the amount of sodium cation released in acid medium determined by atomic absorption spectrometry.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of ftir in the determination of acrylate content in poly(sodium acrylate-co-acrylamide) superabsorbent hydrogels

Magalhães¹,

Neto²,

Bezerra³

et al. 2012

Quím. Nova

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“…The presence of excessive amounts of Cu 2+ in drinking water may lead to accumulation in the liver and cause gastrointestinal problems [1]. Therefore, it is significantly important to remove Cu 2+ from water.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotube–chitosan composite electrodes for electrochemical removal of Cu(II) ions

Zhan

Pan

Nie

et al. 2011

Journal of Alloys and Compounds

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Bidirectional Temperature‐Responsive Thermochromic Hydrogels With Adjustable Light Transmission Interval for Smart Windows

Wang,

Cheng

et al. 2024

Adv Funct Materials

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Thermochromic smart windows have been widely developed for solar regulation to save building energy. However, most current smart windows still exhibit a single responsiveness to a specific temperature, which is not conducive to daytime energy saving or nighttime privacy protection. Herein, a low‐temperature response is achieved by pre‐initiation of the monomer acrylamide (AAm) and acrylic acid (AA) in the synthesis of P(AAm‐co‐AA). Then, N‐isopropyl acrylamide and AAm are introduced into P(AAm‐co‐AA) to form a pre‐polymerized precursor solution. The liquid precursor solution can be encapsulated within two quartz glasses and synthesized in situ to prepare smart windows, which exhibit a high visible light transmittance of 84.4%, excellent solar modulation of 69.5%, and bidirectional temperature responsiveness (cold and hot). In addition, the upper critical solution temperature and the lower critical solution temperature of the hydrogel and the light transmission interval between the two temperatures can be flexibly adjusted to adapt to different climates and individual user needs. The designed smart window maintains a high light transmission within the human body's comfort temperature range. The bidirectional temperature response window achieves the dual functions of energy saving and privacy protection, making it an ideal smart window candidate with good prospects for practical applications.

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Removal of Cu(II) ions from aqueous streams using poly(acrylic acid-co-acrylamide) hydrogels

Cited by 113 publications

References 37 publications

Application of ftir in the determination of acrylate content in poly(sodium acrylate-co-acrylamide) superabsorbent hydrogels

Application of ftir in the determination of acrylate content in poly(sodium acrylate-co-acrylamide) superabsorbent hydrogels

Carbon nanotube–chitosan composite electrodes for electrochemical removal of Cu(II) ions

Bidirectional Temperature‐Responsive Thermochromic Hydrogels With Adjustable Light Transmission Interval for Smart Windows

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