Compressible polydopamine modified pomelo peel powder/poly(ethyleneimine)/κ-carrageenan aerogel with pH-tunable charge for selective removal of anionic and cationic dyes

Yu, Jincheng; Tian, Siyao; Yao, Anrong; Hu, Haoyi; Lan, Jianwu; Yang, Lin; Du, Xiaosheng; Lin, Shaojian

doi:10.1016/j.carbpol.2023.121377

Cited by 22 publications

(2 citation statements)

References 76 publications

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“…These observations suggested that electrostatic interactions are the primary mechanism for dye removal by the WP@PDA/HTCC-1 membrane. As depicted in Figure C, under acidic conditions, catechol groups and amino groups are easily protonated, especially the protonated amino groups carrying a positive charge, allowing them to adsorb negatively charged MO through electrostatic interactions. , Under alkaline conditions, both groups undergo deprotonation, resulting in catechol groups carrying a negative charge while amino groups with an uncharged state, ,, enabling the membrane to adsorb positively charged MEB. As depicted in Figure D, the zeta potential of the WP@PDA/HTCC-1 membrane shifted from positive to negative as the pH increased, with the isoelectric point at 6.69.…”

Section: Resultsmentioning

confidence: 99%

“…In the past decade, polydopamine (PDA), known as mussel-inspired “biological glue”, has garnered significant interest for its straightforward surface modification of various materials for wastewater treatment since it could significantly improve the wettability, stability, separation, and adsorption performances of the materials. ,− For instance, Peng et al fabricated a novel multifunctional graphene oxide (GO)/SiO 2 /PDA composite membrane via a vacuum filtration method for oil–water separation and cationic dye elimination. It successfully demonstrated that the introduction of PDA not only conferred the membrane with exceptional hydrophilicity but also offered active sites for the adsorption of cationic dyes.…”

Section: Introductionmentioning

confidence: 99%

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Construction of Waste Paper-Chitosan-Based Membranes with pH-Tunable Surface Charge for Efficient Separation of Oil-in-Water Emulsion and Dye

Tian,

Liu,

et al. 2024

ACS Sustainable Chem. Eng.

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Developing a cost-effective, versatile, biodegradable, and biobased membrane is crucial for the sustainable treatment of complex wastewater. In this work, a multifunctional membrane was fabricated from polydopamine-modified waste paper (WP@PDA) and hydrothermal carbonized chitosan (HTCC), through simple vacuum filtration. This membrane demonstrated high efficiency in separating oil-in-water emulsions and allowed for the in situ dye removal under controllable pH conditions. The results showed that the as-prepared WP@PDA/HTCC membrane exhibited superhydrophilic, oil-resistant, and pH-tunable surface charge features. With the weight ratio of WP@PDA and HTCC of 6:2, it displayed optimal mechanical properties and structural stability in aqueous environments. As expected, the WP@PDA/HTCC membrane achieved outstanding performance in separating different oil-in-water emulsions at 0.05 bar followed by the satisfactory flux of approximately 2400 L m −2 h −1 bar −1 and separation efficiency of around 99.5%. Furthermore, the abundant functional groups on the WP@PDA and HTCC surface also endowed this membrane with a high removal capability for both cationic and anionic dyes. It can efficiently eliminate methyl orange (MO) and methylene blue (MEB) from dye-contaminated wastewater mainly through electrostatic interactions. Even after filtering 1550 L m −2 of MO and 1650 L m −2 of MEB simulated wastewater using WP@PDA/ HTCC membrane, its removal efficiencies toward both dyes remained above 90.0%. Interestingly, the WP@PDA/HTCC-1 membrane presented bidirectional controlled dye separation behaviors for the dye mixture under the suitable solution pH due to its pH-tunable surface charge feature. Most importantly, the as-prepared membrane showed excellent reusability and high resistance against harsh chemical corrosions without losing its properties. Therefore, the as-prepared WP@PDA/HTCC-1 membrane could be a promising material for complex wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Construction of Waste Paper-Chitosan-Based Membranes with pH-Tunable Surface Charge for Efficient Separation of Oil-in-Water Emulsion and Dye

Tian,

Liu,

et al. 2024

ACS Sustainable Chem. Eng.

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Regulating the Surface State of Carbon Dots as Ultrahigh‐Capacity Adsorbents for Water Treatment

Chen,

Li,

Zou

et al. 2024

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Adsorption is one of the most widely researched and highly effective methods for mitigating the environmental threat posed by recalcitrant dyes in aqueous solutions. This paper presents a solvent‐free synthesis method for the rapid and large‐scale production of nitrogen (N) and phosphorus (P) co‐doped carbon dots (N, P‐CDs) which possess specific surface states and outstanding dye adsorption properties. Compared to the undoped CDs, the N, P‐CDs not only exhibit a higher yield of solid‐state luminescence but also endow them with the efficient adsorption and removal of Congo red (CR) from water. Due to the synergistic effects of π–π stacking, hydrogen bonding and electrostatic attraction, the N, P‐CDs exhibit an ultra‐high adsorption capacity (3118.87 mg g−1) and a removal efficiency (97.4%, at 500 mg L−1) for CR, and also display excellent selective adsorption in both single‐dye and dual‐dye systems. This method offers a rational strategy for synthesizing novel CDs‐based adsorbents for CR, which provides a demonstration for future dye adsorption studies and practical wastewater treatment applications of CDs.

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Composite biopolymer foams fabricated from natural aldehyde functionalized chitosan-whey protein amyloid fibrils: Application for removal of phthalate esters from water

Wang,

Lin,

Qiu

et al. 2025

Carbohydrate Polymers

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Compressible polydopamine modified pomelo peel powder/poly(ethyleneimine)/κ-carrageenan aerogel with pH-tunable charge for selective removal of anionic and cationic dyes

Cited by 22 publications

References 76 publications

Construction of Waste Paper-Chitosan-Based Membranes with pH-Tunable Surface Charge for Efficient Separation of Oil-in-Water Emulsion and Dye

Construction of Waste Paper-Chitosan-Based Membranes with pH-Tunable Surface Charge for Efficient Separation of Oil-in-Water Emulsion and Dye

Regulating the Surface State of Carbon Dots as Ultrahigh‐Capacity Adsorbents for Water Treatment

Composite biopolymer foams fabricated from natural aldehyde functionalized chitosan-whey protein amyloid fibrils: Application for removal of phthalate esters from water

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