Selective removal of cationic micro-pollutants using disulfide-linked network structures

Atas, Mehmet Sahin; Dursun, Sami; Akyıldız, Hasan; Citir, Murat; Yavuz, Cafer T.; Yavuz, Mustafa

doi:10.1039/c7ra04775d

Cited by 22 publications

(12 citation statements)

References 67 publications

(68 reference statements)

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“…Except for CR, the other four dyes display a lower Q e for DPPOF-HPP compared 27,46 For DPPF-HPP, electrostatic interaction is predominant compared with the size effect; repulsion between COOH and electron-rich pores disfavors RB adsorption. 47 Therefore, the adsorption affinity follows the order of CV > RB > CR for DPPF-HPP.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Diphenylphosphine-Substituted Ferrocene/Silsesquioxane-Based Hybrid Porous Polymers as Highly Efficient Adsorbents for Water Treatment

Yang

Liu

2019

ACS Appl. Mater. Interfaces

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The study describes the synthesis of two porous hybrid polymers (abbreviated as DPPF-HPP and DPPOF-HPP) from the Friedel–Crafts reaction of octavinylsilsesquioxane with 1,1′-bis(diphenylphosphine)ferrocene (DPPF) and 1,1′-bis(diphenylphosphine oxide)ferrocene (DPPOF), respectively. DPPF-HPP and DPPOF-HPP possess surface areas of about 890 and 780 m2 g–1, respectively, as well as similar pore structures of the coexisting micropores and mesopores. They are excellent materials for high adsorption of different dyes with adsorption capacities of 2280 mg g–1 for Congo Red and 1440 mg g–1 for Crystal Violet. DPPF-HPP also shows a strong affinity to adsorb Hg2+ ions (300 mg g–1). These materials show no sign of degradation under repeated cycles and thus offer potential for wastewater treatment.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Diphenylphosphine-Substituted Ferrocene/Silsesquioxane-Based Hybrid Porous Polymers as Highly Efficient Adsorbents for Water Treatment

Yang

Liu

2019

ACS Appl. Mater. Interfaces

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“…The Langmuir (eqn (6)), [50][51][52] Freundlich (eqn (7)) 53,54 and Temkin isotherms (eqn (8)) 55,56 were applied to evaluate the equilibrium of the data.…”

Section: Adsorption Isothermmentioning

confidence: 99%

A new adsorbent of Pb(ii) ions from aqueous solution synthesized by mechanochemical preparation of sulfonated expanded graphite

et al. 2017

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“…In this study, the adsorption results were analyzed to figure out whether the adsorption processes followed the Langmuir, Freundlich, or Dubinin–Radushkevich (D–R) isotherm models. The basic hypothesis of the Langmuir model is that adsorption takes place at specific homogeneous sites within the adsorbent. , The Freundlich model is based on the assumption that the adsorption takes place on a heterogeneous surface . The D–R model is applied to explore whether the nature of the adsorption mechanism is physical or chemical .…”

Section: Resultsmentioning

confidence: 99%

“…The basic hypothesis of the Langmuir model is that adsorption takes place at specific homogeneous sites within the adsorbent. 47,48 The Freundlich model is based on the assumption that the adsorption takes place on a heterogeneous surface. 46 The D−R model is applied to explore whether the nature of the adsorption mechanism is physical or chemical.…”

Section: Resultsmentioning

confidence: 99%

Fibrous Materials Based on Polymeric Salicyl Active Esters as Efficient Adsorbents for Selective Removal of Anionic Dye

Zhang

Song

et al. 2020

ACS Appl. Mater. Interfaces

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To increase the performance efficiency and decrease the costs for organic dye wastewater purification, two fibrous adsorbents based on polymeric salicyl active esters were developed by means of a simple two-step approach. For the first time, salicyl-based active ester polymers were electrospun into fibrous membranes and subsequently postmodified with the desired functional groups under simple and mild reaction conditions. The morphology of the produced fibrous adsorbents was characterized by scanning electron microscopy (SEM), the surface properties were analyzed by nitrogen adsorption/desorption isotherms and contact angle measurements, and the completeness of the postmodification process was determined by Fourier transform infrared (FTIR) and elemental analyses. The adsorbents were further tested for their adsorption and selectivity performance of different organic dyes as well as for their recyclability. To explore the adsorption mechanism, four kinetic models and three isotherm models were used to analyze the adsorption data. The results indicated that the fibrous adsorbents showed an extremely high adsorption capacity for the anionic dye methyl blue. The fibrous adsorbents were also able to selectively adsorb anionic dyes from a mixture of anionic and cationic dyes, and they could be recycled at least 10 times. The simple and cost-efficient development process of these fibrous adsorbents and their excellent performance make them promising materials for further research and application in the area of water treatment.

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Selective removal of cationic micro-pollutants using disulfide-linked network structures

Abstract: Micropollutants are found in all water sources, even after thorough treatments that include membrane filtration. We have developed swellable di-sulfide covalent organic polymers (COPs) with great affinity towards cationic textile micropollutants.

Cited by 22 publications

References 67 publications

Diphenylphosphine-Substituted Ferrocene/Silsesquioxane-Based Hybrid Porous Polymers as Highly Efficient Adsorbents for Water Treatment

Diphenylphosphine-Substituted Ferrocene/Silsesquioxane-Based Hybrid Porous Polymers as Highly Efficient Adsorbents for Water Treatment

A new adsorbent of Pb(ii) ions from aqueous solution synthesized by mechanochemical preparation of sulfonated expanded graphite

Fibrous Materials Based on Polymeric Salicyl Active Esters as Efficient Adsorbents for Selective Removal of Anionic Dye

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