Amidoxime-functionalized polyacrylamide-modified chitosan containing imidazoline groups for effective removal of Cu2+ and Ni2+

He, Yang; Gou, Shaohua; Zhou, Lihua; Lan, Tian-Syung; Liu, Tao; Liü, Lang; Duan, Ming

doi:10.1016/j.carbpol.2020.117160

Cited by 70 publications

(20 citation statements)

References 63 publications

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“…As shown in Figure 3, the conspicuous peak was observed at 933.2 (Cu2p 3/2 ) in the wide scan XPS spectra (Figure 3a), 26 evidencing that Cu(II) was successfully adsorbed to PS-MA. 24 I. From Figure 3c, the C1s XPS spectrum of PS-MA indicated three different carbon atoms: nonoxygenated ring C (284.8 eV), in the form of C O (286.2 eV), and O C═O (289.3 eV).…”

Section: Xps Analysismentioning

confidence: 98%

“…The intensive destruction of PS-MA macromolecules takes place in the second stage in the temperature range of 173-652 C, the heat loss of this process was 50.32%, and the maximum value of DTG appeared at 427 C. And the last stage that occurred above 652 C corresponded to the formation of the carbon residue. 24 It was worth noting that in the second stage, the rapid weight loss stage at 346-487 C may be attributed to the depolymerization and intramolecular transfer in the degradation mechanism of the polystyrene chain (30.65% weight loss). 25 Comparing the TG curve of WPS (Figure S4), it can be seen that before reacting with MA, the weight loss of WPS during its pyrolysis process reached 94.9%, almost completely decomposed, with little residual carbon, and the fastest temperature of heat loss rate was 407 C, and the heat loss rate of PS-MA had a maximum temperature of 427 C, which may be due to the increase in the degree of cross-linking.…”

Section: Ftir and Tg Analysesmentioning

confidence: 99%

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Converting waste polystyrene foam into new value‐added materials: A large‐capacity scavenger to remove cationic dyes and heavy metals

Hao

Xie

et al. 2021

J of Applied Polymer Sci

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Waste white foam, toxic dyes, and metal ions are difficult to degrade in the ecological environment, posing a serious threat to human health and natural beauty, it is of great significance to design a functional material to jointly solve these problems. This study provided a facile approach to convert waste polystyrene foam into a new acid anhydride modified polystyrene adsorbent (PS-MA) for the dyes and heavy metals removal from aqueous solution. The as-obtained absorbent was characterized by Fourier transform infrared spectroscopy, thermogravimetry, scanning electron microscopy, energy dispersive spectroscopy, Brunauer Emmett Teller method, and X-ray photoelectron spectroscopy. Influencing factors are including, pH, dye concentration, contact time and temperature on the adsorption of methylene blue (MB), safranine T (ST), and Cu(II) were systematically studied. Boehm titration showed that the content of surface carboxyl groups reached 4.53 mmol/g. The maximum adsorption capacity had reached 1405.37 mg/g for MB, 2269.33 mg/g for ST, 65.03 mg/g for Cu(II). Moreover, the kinetic data were in good agreement with the pseudo-second-order model and closed to adsorption equilibrium at 20 min. After five times of recycling experiments and the application of mixed dye wastewater with salinity, PS-MA showed excellent stability and removal ability. Abundant efforts revealed a broad application prospect of PS-MA materials in water remediation.

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Section: Xps Analysismentioning

confidence: 98%

Section: Ftir and Tg Analysesmentioning

confidence: 99%

Converting waste polystyrene foam into new value‐added materials: A large‐capacity scavenger to remove cationic dyes and heavy metals

Hao

Xie

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

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“…The following references appear in the Supplemental information: Abbasi et al., 2019 ; Abuhatab et al., 2020 ; Ansari et al., 2020 ; Bora et al., 2019 ; Chiou et al., 2020 ; Coldur et al., 2020 ; Darmayanti et al., 2019 ; Fang et al., 2020 ; Feng et al., 2020 ; Ge et al., 2020 ; Ghosh et al., 2019 ; He et al., 2021 ; Hosseinjani-Pirdehi et al., 2020 ; Jiang et al., 2020 ; Jigyasa et al., 2020 ; Joseph et al., 2020 ; Kadian and Manik, 2020 ; Ke et al., 2020 ; Krishnan and Suneesh, 2019 ; Landge et al., 2020 ; Li et al., 2020a ; Li et al., 2020b ; Ma et al., 2020a ; Ma et al., 2020b ; Mal et al., 2020 ; Mathivanan et al., 2020 ; Miao, 2019 ; Nan et al., 2020 ; Podasca et al., 2019 ; Qian et al., 2019 ; Qu et al., 2020 ; Rajalakshmi and Palanisami, 2020 ; Ran et al., 2020 ; Roja et al., 2020 ; Sharma et al., 2019 ; Tian et al., 2019 ; Xiao et al., 2020 ; Xiong et al., 2019 ; Xu et al., 2019 ; Zhu et al., 2020 .…”

Section: Supporting Citationsmentioning

confidence: 99%

N-alkylation briefly constructs tunable multifunctional sensor materials: Multianalyte detection and reversible adsorption

et al. 2021

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Summary A series of N -alkyl-substituted polybenzimidazoles ( SPBIs ), synthesized by simple condensation and N -alkylation, act as functional materials with tunable microstructures and sensing performance. For their controllable morphologies, the formation of nano-/microspheres is observed at the n (RBr)/ n (PBI) feed ratio of 5:1. Products with different degrees of alkylation can recognize metal ions and nitroaromatic compounds (NACs). For example, SPBI-c , obtained at the feed ratio of 1:1, can selectively detect Cu 2+ , Fe 3+ , and NACs. By contrast, SPBI-a , obtained at the feed ratio of 0.1:1, can exclusively detect Cu 2+ with high sensitivity. Their sensing mechanisms have been studied by FT-IR spectroscopy, SEM, XPS, and DFT calculations. Interestingly, the SPBIs can adsorb Cu 2+ in solution and show good recyclability. These results demonstrate that polymeric materials with both sensing and adsorption applications can be realized by regulating the alkylation extent of the main chain, thus providing a new approach for the facile synthesis of multifunctional materials.

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“…To study the pH effect, 0.1 g of adsorbents were used to treat 50 mL solutions of Cu(II) (C o : 100 mg/L) for 1 h at room temperature. At pH: 1, the Cu(II) adsorption was very low as -NH 2 groups present on CH and CH-TNP surface tend to be in the protonated –NH 3 + form, resulting in a loss in its chelating ability with Cu(II) ions [ 41 ]. In addition, at lower pH, there was a competition between H 3 O + ions and Cu(II) ions to occupy active adsorption site.…”

Section: Resultsmentioning

confidence: 99%

Chitosan/Phosphate Rock-Derived Natural Polymeric Composite to Sequester Divalent Copper Ions from Water

et al. 2021

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Herein, a chitosan (CH) and fluroapatite (TNP) based CH-TNP composite was synthesized by utilizing seafood waste and phosphate rock and was tested for divalent copper (Cu(II)) adsorptive removal from water. The XRD and FT-IR data affirmed the formation of a CH-TNP composite, while BET analysis showed that the surface area of the CH-TNP composite (35.5 m2/g) was twice that of CH (16.7 m2/g). Mechanistically, electrostatic, van der Waals, and co-ordinate interactions were primarily responsible for the binding of Cu(II) with the CH-TNP composite. The maximum Cu(II) uptake of both CH and CH-TNP composite was recorded in the pH range 3–4. Monolayer Cu(II) coverage over both CH and CH-TNP surfaces was confirmed by the fitting of adsorption data to a Langmuir isotherm model. The chemical nature of the adsorption process was confirmed by the fitting of a pseudo-second-order kinetic model to adsorption data. About 82% of Cu(II) from saturated CH-TNP was recovered by 0.5 M NaOH. A significant drop in Cu(II) uptake was observed after four consecutive regeneration cycles. The co-existing ions (in binary and ternary systems) significantly reduced the Cu(II) removal efficacy of CH-TNP.

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Amidoxime-functionalized polyacrylamide-modified chitosan containing imidazoline groups for effective removal of Cu2+ and Ni2+

Cited by 70 publications

References 63 publications

Converting waste polystyrene foam into new value‐added materials: A large‐capacity scavenger to remove cationic dyes and heavy metals

Converting waste polystyrene foam into new value‐added materials: A large‐capacity scavenger to remove cationic dyes and heavy metals

N-alkylation briefly constructs tunable multifunctional sensor materials: Multianalyte detection and reversible adsorption

Chitosan/Phosphate Rock-Derived Natural Polymeric Composite to Sequester Divalent Copper Ions from Water

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