Multicomponent adsorption of benzene and selected borderline heavy metals by poly (butadiene-co-acrylic acid) hydrogel

Omondi, Brian A.; Nguele, Ronald; Okabe, Hirotaka; Hidaka, Yoshiki; Hara, Kazuhiro

doi:10.1016/j.jece.2016.07.013

Cited by 11 publications

(5 citation statements)

References 33 publications

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“…Building on these foundations, this work now attempts multiple ions capture (selected heavy metal ions, Ni(II), Cu(II), Zn(II) and Cr(VI) onto a single absorbent framework. Hydrogels was the choice absorbent owing to its remarkable flexibility in design and ability to incorporate multiple functional groups while retaining the low-cost nature; and ability to be regenerated for reuse [21][22][23]. Successful applications in dilute concentration environments coupled with hydrogels ability to imbibe water and swell is also a unique property of hydrogel absorbents that facilitates higher absorption capacities [24,25].…”

Section: Introductionmentioning

confidence: 99%

“…In the pursuit to achieve simultaneous extraction of both the heavy metal-anion and cation within a single absorbent, hydrogel's polymeric network offers great versatility by enabling multiple functional groups to be attached to the main polymer backbone [23]. Cr(VI) has an unusual property occurring as metal anion (Cr 2 O 7 ) 2-) instead of cation.…”

Section: Introductionmentioning

confidence: 99%

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Ionized acrylamide-based copolymer / terpolymer hydrogels for recovery of positive and negative heavy metal ions

Fujimoto,

Omondi,

Kawano

et al. 2024

PLoS ONE

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In this study, we explored the effective capture of both cations and anions onto a single adsorbent. Acrylamide (AAm) served as the polymer backbone, onto which co-monomers sodium p-styrenesulfonate (SS) and N,N-dimethylaminopropyl acrylamide (DMAPAA) were grafted, creating ionized polymer hydrogel adsorbents. These adsorbents were engineered for the synergistic separation and recovery of heavy metal cations and anions from concentrated solutions, focusing specifically on industrially significant ions such as Ni2+-, Cu2+, Zn2+ and (Cr2O7)2-. The adsorption and desorption behaviors of the AAm terpolymer hydrogels were investigated across various pH solutions, considering the competition and concentrations of these specific metal ions. Moreover, the study delved into the effects of the internal pH environment within the hydrogel adsorbents, determining its impact on the type of metal adsorbed and the adsorption capacity. Our findings indicated that the adsorption of cations was enhanced with a higher proportion of SS relative to DMAPAA in the hydrogel. In contrast, significant anion capture occurred when the concentration of DMAPAA exceeded that of SS. However, equal ratios of SS and DMAPAA led to a noticeable reduction in the adsorption of both types of substrates, attributed to the counteractive nature of these co-monomers. To enhance the adsorption efficiency, it may be necessary to consider methods for micro-scale separation of the two types of monomers. Additionally, the adsorption capacity was observed to be directly proportional to the swelling capacity of the hydrogels. For complete desorption and separation of the cations and anions from the adsorbent, the application of concentrated NaOH solutions followed by HNO3 was found to be essential. Given the varying concentrations of cation and anion pollutants, often present in heavy metal factory effluents, it is crucial to fine-tune the ratios of DMAPAA and SS during the synthesis process. This adjustment ensures optimized efficiency in the decontamination and recovery of these significant heavy metal ions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ionized acrylamide-based copolymer / terpolymer hydrogels for recovery of positive and negative heavy metal ions

Fujimoto,

Omondi,

Kawano

et al. 2024

PLoS ONE

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“…Stimuli-sensitive polymers have gained great interest recently in the design of intelligent materials for multi purposes such as controlled drug delivery systems, adsorbent for dye removal, heavy metal adsorption, solute separation, artificial organs and enzyme immobilization [5][6][7][8][9][10]. Typical examples of these polymers involve poly(acrylic acid), poly(Nisopropylacrylamide), poly(2-acrylamido-2methyl-1-propanesulfonic acid)(PAMPS), poly(2-(dimethylamino) ethylmethacrylate) [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Adsoption of Cationic Dye on Anionic Hydrogel and Its Second Use for Drug Delivery with Antibacterial Properties

Ilgın¹

2018

HJBC

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B u çalışmada, serbest radikal kopolimerizasyonu ile 2,3-epoksipropilmetakrilat ve 2-akrilamido-2-metil-1propansülfonik asit içeren yeni bir uyarana duyarlı p (EPMA-co-AMPS) hidrojeller hazırlandı. Elde edilen hidrojellerin şişme özelliklerinin yanında yüzey morfolojisi, kimyasal ve mekanik özellikleri SEM, FTIR ve TPA kullanılarak tamamen karakterize edilmiştir. İlk olarak, çevresel uygulamalarda sulu çözeltiden katyonik boyaların uzaklaştırılması için hidrojeller kullanılmıştır. Hidrojellerin adsorpsiyon izotermleri ve kinetikleri, sırasıyla Langmuir denklemi ve yalancı-ikinci mertebeden denklem ile iyi bir uyum içindedir. Ayrıca, p (EPMA-co-AMPS) hidrojellerin adsorpsiyon kapasitesi, halihazırda bildirilmiş olan diğer adsorbanlarla karşılaştırıldığında rekabet etmektedir. İkinci olarak, biyomedikal uygulamalarda kontrollü ilaç salımı çalışmaları için hidrojelin bir ilaç taşıyıcısı olarak kullanımı araştırılmıştır. Son olarak, ilaç-yüklü hidrojeller Gram-pozitif bakterilere (Bacillus cereus) ve Gram-negatif bakterilere (Salmonella typhimurium) karşı antibakteriyel aktiviteler için test edilmiş ve antibakteriyel aktivite göstermiştir. Bu çalışmadan elde edilen sonuçlar, hazırlanan hidrojelin çeşitli uygulamalar için umut verici materyaller olabileceğini göstermektedir. Anahtar KelimelerHidrojeller, boya, ilaç taşıyıcı sistemler, adsorpsiyon, antibakteriyel aktivite.

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“…This owes to the simplicity, versatility, and effectiveness that can be derived from the various adsorbents, such as zeolites [1][2][3][4], activated carbons, biomaterials [5], carbon nanotubes [6], and recently, hydrogels [7][8][9]. Adsorbents also afford the much-desired ability to recover the metals and other adsorbates for potential reuse [10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Poly(1,4,7-Trioxacycloundecane-8,11-dione) Macrocyclic Functionalized Hydrogel for High Selectivity Adsorption and Complexation of Bismuth Ion

et al. 2018

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Macrocyclic functional hydrogels incorporating new poly cyclic active sites (1,4,7-trioxacycloundecane-8,11-dione) within their entire network, have been synthesized. Using the high-dilution coupling of the bi-functional monomers maleic acid and bis(chloroethyl)ether in a sol-gel chemistry synthesis, 11-membered chelate rings infused with three oxygen donor atoms were created and characterized, and their structures confirmed using Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopic analyses. The macrocyclic gel, designed for selective host-guest adsorption and complexation of metal substrates, was initially tested against an aqueous set of 14 metal competitive solutions, where it demonstrated exclusive selectivity for Bi 3+ aq , with the other metals exhibiting zero adsorption. Further analysis using binary and single ion Bi 3+ -containing solutions showed a near-complete removal of Bi 3+ using this polycyclic hydrogel, with 98% extraction efficiency and q = 9.80 mg/g. These results clearly confirm that the 1,4,7-trioxacycloundecane-8,11-dione cyclic sites are most suitable for high selectivity and capture of Bi. The metal substrates were entrapped within the 1,4,7-trioxacycloundecane-8,11-dione cyclic sites. Evidently, by exploiting the host-guest complexation chemistry of macrocycles, we were able to design hydrogel adsorbents whose networks were comprised entirely of macrocyclic active groups for possible purification works of copper involving bismuth impurities, and/or for efficient selective uptake and recovery of bismuth trace ions existing in highly competitive environments such as sea water.

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Multicomponent adsorption of benzene and selected borderline heavy metals by poly (butadiene-co-acrylic acid) hydrogel

Cited by 11 publications

References 33 publications

Ionized acrylamide-based copolymer / terpolymer hydrogels for recovery of positive and negative heavy metal ions

Ionized acrylamide-based copolymer / terpolymer hydrogels for recovery of positive and negative heavy metal ions

Adsoption of Cationic Dye on Anionic Hydrogel and Its Second Use for Drug Delivery with Antibacterial Properties

Synthesis and Characterization of Poly(1,4,7-Trioxacycloundecane-8,11-dione) Macrocyclic Functionalized Hydrogel for High Selectivity Adsorption and Complexation of Bismuth Ion

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