Recent progress in chromium removal from wastewater using covalent organic frameworks – A review

Samajdar, Soumita; Golda A, Shiny; Lakhera, Sandeep Kumar; Ghosh, Srabanti

doi:10.1016/j.chemosphere.2023.141028

Cited by 8 publications

(1 citation statement)

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“…The extent to which the reaction proceeds can be enhanced by increasing the concentration of reactants or decreasing the concentration of products. According to Equation (1) [ 26 ], increasing the concentration of Cr(VI) and the total number of photogenerated electrons on the catalyst surface or decreasing the concentration of Cr(III) can achieve a positive shift in the reduction reaction. However, it is disappointing that there are limited studies on this aspect.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Mass Transfer Process for Photocatalytic Reduction in Cr(VI) by Electric Field Assistance

Feng,

Lin,

Gan

et al. 2024

IJMS

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The removal of Cr(VI), a highly-toxic heavy metal, from industrial wastewater is a critical issue in water treatment research. Photocatalysis, a promising technology to solve the Cr(VI) pollution problem, requires urgent and continuous improvement to enhance its performance. To address this need, an electric field-assisted photocatalytic system (PCS) was proposed to meet the growing demand for industrial wastewater treatment. Firstly, we selected PAF-54, a nitrogen-rich porous organic polymer, as the PCS’s catalytic material. PAF-54 exhibits a large adsorption capacity (189 mg/g) for Cr(VI) oxyanions through hydrogen bonding and electrostatic interaction. It was then coated on carbon paper (CP) and used as the photocatalytic electrode. The synergy between capacitive deionization (CDI) and photocatalysis significantly promotes the photoreduction of Cr(VI). The photocatalytic performance was enhanced due to the electric field’s influence on the mass transfer process, which could strengthen the enrichment of Cr(VI) oxyanions and the repulsion of Cr(III) cations on the surface of PAF-54/CP electrode. In addition, the PCS system demonstrates excellent recyclability and stability, making it a promising candidate for chromium wastewater treatment.

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Section: Introductionmentioning

confidence: 99%