Synthesis of microcrystalline indium (III)-MOF and adsorptive and selective removal of dyes

Maru, Ketan; Kalla, Sarita; Ghosh, Arup K.; Jangir, Ritambhara

doi:10.1007/s11164-023-05161-w

Cited by 7 publications

(11 citation statements)

References 89 publications

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Section: Resultsmentioning

confidence: 89%

“…It has been found that the individual In-MOF solid absorbs MB with remarkable effectiveness in an MB + /RHB + and MB + / MO − system, making it an attractive choice for selectively removing MB in an M 4 membrane filtration (MF) process. 60 The M 4 membrane was explicitly chosen for selective filtering in the mixed dye MB + /RHB + and MB + /MO − system. The system consisted of a mixture of 50 mL of MB and 50 mL of RHB or MO in a total volume of 0.1 L. The filtration process was carried out utilizing a vacuum-assisted filtration assembly.…”

Section: Selective Filtration Processmentioning

confidence: 99%

“…In our recently published work, it has been shown that the In-MOF exhibits high efficiency in removing MB, and in a mixed dye system, it demonstrates selective adsorption of MB over RHB in batch dye adsorption processes. 60 The removal mechanism for cationic dye mixtures is indeed complex. While electrostatic interactions typically account for behavior in mixtures containing cationic and anionic dyes, explaining cases like MB + /RHB + where both dyes are cationic proves particularly challenging.…”

Section: Proposed Dye Filtration Mechanismmentioning

confidence: 99%

“…Notably, the M 4 membrane demonstrated superior dye removal capacity compared to the powdered In-MOF, which only achieved 99% removal of dye molecules at a concentration of 20 ppm. 60 Furthermore, regeneration studies showed that M 4 maintained its structural integrity and dye removal efficiency for up to five cycles, after which the removal efficiency decreased to 70%. These findings highlight the potential of the In-MOF@PVDF membranes, particularly the M 4 membrane, for efficient and selective dye removal in wastewater treatment applications.…”

Section: Introductionmentioning

confidence: 96%

“…The water stability of the M 4 membrane was assessed using ICP-OES, revealing its high stability. Notably, the M 4 membrane demonstrated superior dye removal capacity compared to the powdered In-MOF, which only achieved 99% removal of dye molecules at a concentration of 20 ppm . Furthermore, regeneration studies showed that M 4 maintained its structural integrity and dye removal efficiency for up to five cycles, after which the removal efficiency decreased to 70%.…”

Section: Introductionmentioning

confidence: 97%

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Efficient Dye Extraction from Wastewater Using Indium-MOF-Immobilized Polyvinylidene Fluoride Membranes with Selective Filtration for Enhanced Remediation

Maru,

Kalla,

Jangir

2024

Langmuir

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Industrial activities have led to releasing harmful substances into the environment, necessitating the elimination of these toxic compounds from wastewater. Organic dyes, commonly found in industrial effluents, pose a threat to ecosystems and human health. Conventional treatment methods often suffer from limitations such as high cost and poor efficiency. Metal−organic frameworks (MOFs) have emerged as promising materials for selective separation, including membrane filtration (MF). Mixedmatrix membranes (MMMs) combining MOFs with polymers offer improved filtration properties. In this study, MMMs were fabricated by incorporating synthesized In-MOF with a polyvinylidene fluoride (PVDF) polymer (In-MOF@PVDF MMMs) using the nonsolvent-induced phase separation process. The MMMs were evaluated for the MF of various organic dyes, achieving notable removal efficiencies. The membrane containing 20% In-MOF (M 4 ) demonstrated exceptional performance, removing 99% of the methylene blue (MB) dye. Additionally, membrane M 4 effectively filtered Azure A (AZA), Azure B (AZB), and toluidine blue O (TOLO) with a removal efficiency of 99%. However, for Rhodamine B (RHB) and methyl orange (MO), the removal efficiencies were slightly lower at 74 and 39%, respectively. Further, these membranes are utilized in selective dye filtration in the MB + /RHB + and MB + /MO − systems, where the selectivity was found for MB. The isothermal and DFT studies revealed the membrane's behavior with dye mixtures, while water stability and regeneration studies confirmed its durability. Thus, these findings highlight the potential of In-MOF@PVDF MMMs for effective and selective dye removal in wastewater treatment applications.

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Section: Resultsmentioning

confidence: 89%

Section: Selective Filtration Processmentioning

confidence: 99%

Section: Proposed Dye Filtration Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 97%

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