Facile synthesis of hollow globular Cr(VI)-adsorbents inspired from assembly to polymerization

Gao, Song; Liu, Qinze; Liu, Qiang; Yuan, Chengbing; Gao, Tingting; Yao, Jinshui

doi:10.1016/j.jclepro.2019.119485

Cited by 13 publications

(4 citation statements)

References 47 publications

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“…A large number of studies have shown that nitrogencontaining adsorbents can adsorb Cr(VI) (Zhao et al 2021b;Zhu et al 2020). For example, Gao et al (2020) prepared hollow spherical adsorbents using tannic acid (TA) and 1,6-hexanediamine (HA) and polyvinyl alcohol (PVA). The adsorption of Cr(VI) on the protonated amino groups was proved by X-ray photoelectron spectrometry (XPS).…”

Section: Introductionmentioning

confidence: 99%

Cellulose-g-tetraethylenepentamine dual-function imprinted polymers selectively and effectively adsorb and remove 4-nitrophenol and Cr(VI)

Lang

et al. 2022

Cellulose

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A cellulosic material has been synthesized that could efficiently and selectively adsorb organic and inorganic contaminants from aqueous solutions without interference from competing adsorption sites. Cellulose-graft-tetraethylenepentamine molecular imprinted polymer (C-TEPA-MIP) was synthesized by using 4-nitrophenol (4-NP) as the template. The C-TEPA-MIP adsorbent could adsorb 4-NP and Cr(VI) simultaneously and selectively, without being affected by the competitive adsorption sites of each of these pollutants. The adsorption of 4-NP was predominantly due to the imprinted sites of 4-NP in C-TEPA-MIP that were located inside of the adsorbent, whereas that of Cr(VI) was primarily due to the amine groups of TEPA found on the surface of the adsorbent. Compared with the non-imprint polymer synthesized without the template, C-TEPA-MIP showed higher selectivity for both 4-NP and Cr(VI) in unitary and binary systems. In addition, C-TEPA-MIP exhibited good stability and recyclability for 4-NP, which makes it a promising candidate material for applications concerning wastewater treatment. Graphical abstract

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Section: Introductionmentioning

confidence: 99%

Cellulose-g-tetraethylenepentamine dual-function imprinted polymers selectively and effectively adsorb and remove 4-nitrophenol and Cr(VI)

Lang

et al. 2022

Cellulose

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“…Tannic acid (TA) is a natural polyphenolic compound widely found in various plants [ 15 ]. The catechol groups present in TA react with primary amine groups to form a new type of macromolecular structure polymer, and it is rich in phenolic hydroxyl (ph-OH) and –NH 2 groups, which provides a new idea for the design of new adsorbents [ 16 , 17 ]. Liu et al prepared a polytannin-1,6-hexamethylenediamine adsorbent with an adsorption capacity of 200 mg/g to remove Cr(VI) [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…In this work, a tannin-amine microsphere was fabricated via an environmentally friendly and straightforward preparation method with the help of polyethylene glycol (PEG) [ 17 ]. PEG, a potential Cr(VI)-adsorbent, can be mixed in a tannin-amine system to form rough porous microspheres and increase the rate and amount of adsorption [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Polyethylene Glycol@Tannin-Amine Microsphere towards Cr(VI) Removal

et al. 2021

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Herein, a synthetic strategy for a rough microsphere Cr(VI)-adsorbent via the reaction of tannic acid (TA) and 1,6-hexanediamine (HA) and using polyethylene glycol (PEG) as surface modifier was presented. This adsorbent was characterized by a Fourier Transform Infrared spectrometer (FTIR), thermogravimetic analysis (TGA), X-ray photoelectron spectroscopy (XPS), etc. Certain factors, including contact time, PEG@poly(tannin-1,6-hexanediamine) (PEG@PTHA) dosage, initial concentration, and experimental temperature affecting the Cr(VI) adsorption performance of adsorbent were explored. PEG@PTHA can adsorb Cr and the Cr(VI) was reduced up to Cr(III) due to the existence of phenolic hydroxyl groups. Its adsorption capacity can reach up to 300 mg/g within 10 min and approximately 100% removal percentage below the initial concentration of 100 mg/L. Its behavior matched well with the Langmuir isotherm model and pseudo-second-order kinetic model. A PEG@PTHA adsorbent with maximum adsorption capacity (450 mg/g) has great prospects in Cr(VI)-sewage treatment.

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“…A large number of studies have shown that nitrogen-containing adsorbents can adsorb Cr(VI) (Zhao et al 2021b;Zhu et al 2020). For example, Gao et al (Gao et al 2020) prepared hollow spherical adsorbents using tannic acid (TA) and 1,6-hexanediamine (HA) and polyvinyl alcohol (PVA). The adsorption of Cr(VI) on the protonated amino groups was proved by XPS.…”

Section: Introductionmentioning

confidence: 99%

Cellulose-g-tetraethylenepentamine Dual-function Imprinted Polymers Selectively and Effectively Adsorb and Remove 4-Nitrophenol and Cr(VI)

Lang

et al. 2021

Preprint

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A cellulosic material could efficiently and selectively adsorb organic and inorganic contaminants from aqueous solutions without interference from competing adsorption sites. In this study, cellulose-graft-tetraethylenepentamin molecular imprinted polymer (C-TEPA-MIP) was synthesized by using 4-nitrophenol (4-NP) as the template. The C-TEPA-MIP adsorbent could adsorb 4-NP and Cr(VI) simultaneously and selectively, without being affected by the competitive adsorption sites of each of these pollutants. The adsorption of 4-NP was predominantly due to the imprinted sites of 4-NP in C-TEPA-MIP that were located inside of the adsorbent, whereas that of Cr(VI) was primarily due to the amine groups of TEPA found on the surface of the adsorbent. Compared with the non-imprint polymer synthesized without the template, C-TEPA-MIP showed higher selectivity for both 4-NP and Cr(VI) in unitary and binary systems. In addition, C-TEPA-MIP exhibited good stability and recyclability for 4-NP, which makes it a promising candidate material for applications concerning wastewater treatment.

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Facile synthesis of hollow globular Cr(VI)-adsorbents inspired from assembly to polymerization

Cited by 13 publications

References 47 publications

Cellulose-g-tetraethylenepentamine dual-function imprinted polymers selectively and effectively adsorb and remove 4-nitrophenol and Cr(VI)

Cellulose-g-tetraethylenepentamine dual-function imprinted polymers selectively and effectively adsorb and remove 4-nitrophenol and Cr(VI)

Facile Synthesis of Polyethylene Glycol@Tannin-Amine Microsphere towards Cr(VI) Removal

Cellulose-g-tetraethylenepentamine Dual-function Imprinted Polymers Selectively and Effectively Adsorb and Remove 4-Nitrophenol and Cr(VI)

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