Green Photocatalytic Route To Synthesize Cross-Linked Polyacrylamide Flocculant for Flocculation of High Turbid Wastewater DOI

Shi Liu,

Kaicheng Zhou, Weiping Liu

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(14), P. 6100 - 6109

Published: April 1, 2024

As one of the most important flocculants, polyacrylamide (PAM)-based materials show enhanced capability to purify highly turbid wastewater by prolonging length molecular chains and modifying functional groups, which, however, generally involves complex synthetic procedures expensive guests. In this study, exfoliated g-C3N4 colloids (CNCs) were used as sunlight-driven photocatalysts trigger radical polymerization acrylamide (AM) without adding any initiator. More importantly, CNCs also acted a cross-linker prolong PAM chain, thus promoting flocculation water. The content in CNCs/PAM hybrid (CNPAM), dosage, pH value optimized. We further studied effects stirring speed time well sedimentation on behavior. Under optimal conditions, CNPAM flocculant could effectively flocculate kaolin suspension with transmittance >93%. fractal dimension analysis indicated floc size increased enhancement CNC flocculant. It was testified that had good universality for high water different concentrations presence various inorganic salts. This study demonstrates photocatalysis is green, time-saving, economical route prepare crossing-linked skeleton are promising efficient flocculants purification wastewater.

Language: Английский

Comb-Like Cationic Chitosan-Based Flocculant with Enhanced H-Bond Hydration for Effectively Treating Saline Colored Effluents with High Salinity DOI Creative Commons
Xuekun Yang,

Wenzheng Ban,

Rongya Zhang

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(6), P. 2534 - 2543

Published: Feb. 6, 2024

Quaternized chitosan flocculants exhibit excellent removal efficiencies for anionic contaminants, while the treatment efficacy is greatly impeded colored effluents with high salinity due to their lower hydration ability in saline solutions. In this work, we developed a new kind of comb-like cationic chitosan-based hydrogen-bond (H-bond) enhanced ability, CS-g-p(DMC-co-HEMA) (CPDH), by grafting copolymerization 2-hydroxyethyl methacrylate (HEMA) and methacrylatoethyl trimethylammonium chloride (DMC) onto skeletons. The hydroxyl groups from HEMA could improve CPDHs environment, abundant quaternary ammonium DMC endow satisfactory antibacterial against both Staphylococcus aureus Escherichia coli. Three different H-bond components were synthesized tuning molar ratio applied treat types pollutants solution using kaolin dyes as model pollutants. Experiments showed that CPDH1 exhibited tolerance achieved more than 96% efficiency methyl blue deionized water conditions. contrast, CPDH0 without component media was undermined, showing 12.5% decrease when compared water. Furthermore, demonstrated universal flocculation performance effectively remove including particles sources wide pH ranges, demonstrating good diverse environments providing approach develop qualified biopolymer-based treating dyeing wastewaters.

Language: Английский

Citations

5
Adsorption of Bisphenol A from Water Using Chitosan-Based Gels DOI Creative Commons
Ludmila Aricov, Anca Ruxandra Leontieş

Gels, Journal Year: 2025, Volume and Issue: 11(3), P. 180 - 180

Published: March 5, 2025

The comonomer bisphenol A (BPA) finds applications in the plastics industry, where it is used production of polycarbonates, plastics, PVC, thermal paper, epoxy and vinyl ester resins, polyurethane. water, with which many these materials come into contact, one main sources human exposure to BPA. When ingested or touched, BPA can damage organs, disrupt endocrine immune systems, generate inflammatory responses, be involved genotoxic processes. Therefore, need develop effective techniques for removing from aqueous environments imperative. This paper provides a comprehensive review regarding removal focusing on performance adsorption mechanisms various adsorbents based chitosan composites. chemical physical factors, kinetics models governing process are also examined. outlines that, despite considerable progress absorption using gels, further research necessary assess efficacy treating real wastewater large-scale manufacture.

Language: Английский

Citations

0
Magnetic separation and recovery of powder particles from water using Fe3O4@CTS-BDAT DOI
Cheng Peng, Chuang Liu,

Sicong Du

et al.

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132528 - 132528

Published: March 1, 2025

Language: Английский

Citations

0
Green Photocatalytic Route To Synthesize Cross-Linked Polyacrylamide Flocculant for Flocculation of High Turbid Wastewater DOI

Shi Liu,

Kaicheng Zhou, Weiping Liu

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(14), P. 6100 - 6109

Published: April 1, 2024

As one of the most important flocculants, polyacrylamide (PAM)-based materials show enhanced capability to purify highly turbid wastewater by prolonging length molecular chains and modifying functional groups, which, however, generally involves complex synthetic procedures expensive guests. In this study, exfoliated g-C3N4 colloids (CNCs) were used as sunlight-driven photocatalysts trigger radical polymerization acrylamide (AM) without adding any initiator. More importantly, CNCs also acted a cross-linker prolong PAM chain, thus promoting flocculation water. The content in CNCs/PAM hybrid (CNPAM), dosage, pH value optimized. We further studied effects stirring speed time well sedimentation on behavior. Under optimal conditions, CNPAM flocculant could effectively flocculate kaolin suspension with transmittance >93%. fractal dimension analysis indicated floc size increased enhancement CNC flocculant. It was testified that had good universality for high water different concentrations presence various inorganic salts. This study demonstrates photocatalysis is green, time-saving, economical route prepare crossing-linked skeleton are promising efficient flocculants purification wastewater.

Language: Английский

Citations

0