Toxic Cr removal from aqueous media using catechol-amine copolymer coating onto as-prepared cellulose

Hu, Tao; Liu, Qiang; Liu, Qinze; Wu, Yang; Qiao, Chuanling; Yao, Jinshui

doi:10.1016/j.carbpol.2019.01.046

Cited by 24 publications

(5 citation statements)

References 46 publications

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“…Figure a,b shows the FTIR spectra of PF–PYZ before and after the adsorption. The band at 668 cm –1 is assigned to the Cr–O bond after chelating Cr(VI). − Because of the interplay between hydroxyl groups in phenols and Cr(VI), a second shoulder band emerged at 1031 cm –1 …”

Section: Results and Discussionmentioning

confidence: 99%

Phenol-Formaldehyde/Pyrazole Composite: Synthesis, Characterization, and Evaluation of its Chromate Removal Efficiency

Abdou,

Abbas,

Ismail

et al. 2024

ACS Omega

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In this study, we report the successful synthesis of a phenol-formaldehyde-pyrazole (PF–PYZ) compound through the surface functionalization of phenol-formaldehyde (PF) with pyrazole (PYZ). The resulting mixture was subjected to comprehensive characterization using a range of analytical techniques, including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The newly synthesized PF–PYZ material effectively removes Cr(VI) ions. Notably, a substantial elimination efficiency of 96% was achieved after just 60 min of contact time. The strategic incorporation of pyrazole (PYZ) as the principal functionalizing agent contributed to this exceptional performance. Notably, the functionalized PYZ sites were strategically positioned on the surface of PF, rendering them readily accessible to metal ions. Through rigorous testing, the optimal sorption capacity of PF–PYZ for Cr(VI) ions was quantified at 0.872 mmol Cr(VI)/g, highlighting the material’s superior adsorption capabilities. The practical utility of PF–PYZ was further established through a reusability test, which demonstrated that the chromate capacity remained remarkably stable at 0.724 mequiv Cr(VI)/g over 20 consecutive cycles. This resilience underscores the robustness of the resin, indicating its potential for repeated regeneration and reuse without a significant capacity loss. Our work presents a novel approach to functionalizing phenol-formaldehyde with pyrazole, creating PF–PYZ, a highly efficient material for removing Cr(VI) ions. The compound’s facile synthesis, exceptional removal performance, and excellent reusability collectively underscore its promising potential for various water treatments, especially oil field and environmental remediation applications.

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Section: Results and Discussionmentioning

confidence: 99%

Phenol-Formaldehyde/Pyrazole Composite: Synthesis, Characterization, and Evaluation of its Chromate Removal Efficiency

Abdou,

Abbas,

Ismail

et al. 2024

ACS Omega

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“…PEG was attached successfully to the surface of PTHA microspheres and they combined well with each other. As can be seen in Figure 3 b, the peak at 540 cm −1 was attributed to the vibration of Cr=O, and the peaks at 919 and 809 cm −1 were attributed to the phenolic hydroxyl group that interacts with Cr [ 21 ].…”

Section: Resultsmentioning

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 composite adsorbent (PCA@AC) was successfully devised via cellulose (AC) as a substrate and poly(catechol tetraethylenepentamine-p-phenylenediamine) as a coating layer under a multitude of technical conditions. 187 This composite maintains a remarkable performance for removing Cr(VI) from aqueous solutions, surpassing pure AC. The PCA@AC maximum adsorption capacity for Cr(VI) is obtained as 507.61 mg g À1 at 30 1C using the Langmuir model, surpassing pure AC.…”

Section: Cellulose-incorporating Metalsmentioning

confidence: 98%

Perspectives regarding metal/mineral-incorporating materials for water purification: with special focus on Cr(vi) removal

et al. 2020

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Toxic Cr removal from aqueous media using catechol-amine copolymer coating onto as-prepared cellulose

Cited by 24 publications

References 46 publications

Phenol-Formaldehyde/Pyrazole Composite: Synthesis, Characterization, and Evaluation of its Chromate Removal Efficiency

Phenol-Formaldehyde/Pyrazole Composite: Synthesis, Characterization, and Evaluation of its Chromate Removal Efficiency

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

Perspectives regarding metal/mineral-incorporating materials for water purification: with special focus on Cr(vi) removal

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