Viologen-functionalized magnetic material for the removal of Iodine and benzanthracene in an aqueous solution

Babujohn, Nisar Ahamed; Eluri, Amoluck

doi:10.1007/s11356-023-27096-w

Cited by 3 publications

(2 citation statements)

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“…It is worth noting that the adsorption capacity of PHCPs for iodine remains almost unaffected regardless of the pH value, indicating that electrostatic interactions do not play a dominant role in the adsorption process . However, when the pH value reaches 8, the color of the KI solution turns rapidly from yellow to colorless in the absence of the adsorbent, which is mainly due to the inherent degradation of the iodide under alkaline conditions …”

Section: Resultsmentioning

confidence: 99%

“…55 However, when the pH value reaches 8, the color of the KI solution turns rapidly from yellow to colorless in the absence of the adsorbent, which is mainly due to the inherent degradation of the iodide under alkaline conditions. 56 The competitive adsorption effect of anions on iodine in aquatic environments is also a key factor that should be considered in practical applications. The interference experiments were carried out by combining iodine solution with five anions at a 1:1 mass ratio concentration; then, adsorbents were added to the mixed aqueous solution of iodine, and the iodine was continuously adsorbed for 36 h. As shown in Figures 11b and S15, in the presence of competing ions, removal efficiency is almost unaffected except for PHCP-4.…”

Section: ■ Introductionmentioning

confidence: 99%

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Porphyrin-Based Hyper-Cross-Linked Polymers as Adsorbents for Reversible Capture of Iodine

Ma,

Shi,

Wang

et al. 2024

ACS Sustainable Chem. Eng.

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Designing a novel adsorbent with high selectivity and absorptive capacity to remove I 2 remains a challenging task. In this work, a series of porphyrin-based hyper-cross-linked porous organic polymers (PHCPs) with a dual hydroxy-rich structure were synthesized by the Friedel−Crafts reaction. PHCPs exhibit excellent thermal stability. The incorporation of abundant π-electrons and heteroatoms (N/O) in the PHCPs framework leads to substantial charge transfer interactions with iodine, resulting in a high adsorption capacity (469 mg g −1 ) and rapid adsorption. Moreover, the adsorption dynamics of PHCPs for iodine in both aqueous and cyclohexane solutions follow a pseudo-second-order kinetic model, and the adsorption isotherm model complies with the Freundlich model. Importantly, PHCPs selectively capture I 3 − in the presence of anionic competition and effectively capture iodine at different pH values. Additionally, the volatile iodine capture performance of PHCPs reached 623 wt %. This study highlights the extensive application prospects of PHCPs in the removal of iodine from both the gas and liquid phases.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%