Adsorption and photocatalytic degradation of tetracycline from water by kappa‐carrageenan and iron oxide nanoparticle‐filled poly (<scp>acrylonitrile‐co‐N</scp>‐vinyl pyrrolidone) composite gel

Bhangi, Bidyut Kumar; Ray, Samit Kumar

doi:10.1002/pen.26202

Cited by 7 publications

(22 citation statements)

References 52 publications

(81 reference statements)

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“…However, with increase in C o , it becomes sharp and τ BT also decreases at higher C o . In fact, at higher C o , the concentration gradient increases from the aqueous dye solution to the adsorbent polymer bed because of the concentration dependent diffusion in the fixed bed as also reported elsewhere 20,34 . The effect of different inlet dye flow rates ( Q t ) on the column adsorption of the two dyes are shown in Figure 9B.…”

Section: Resultssupporting

confidence: 71%

“…Similarly, the polymer remains neutral in a solution pH = pH PZC and cationic in a solution pH < pH PZC. 20 The present composite adsorbent consists of partially neutralized polyacrylic/acrylates and PVA. The pK a value of pure PAA is 6.80, 33 that is, it will completely ionize to COO − in and above a solution pH of 6.80.…”

Section: Resultsmentioning

confidence: 99%

“…For the column adsorption, the normalized concentration C t / C o ( C t is concentration of the dye solution after t minute of adsorption) was plotted against adsorption time t . The effluent volume ( V eff ), the total amount of dye sent to the column for adsorption time t (M t , mg), the amount of the dye adsorbed in the column (q t , mg) for a volumetric flow rate of Q t (mL/min), the residual concentration of the dye not adsorbed and left in the column ( C t , mg/L), the equilibrium or maximum adsorption capacity (q e , mg/g) of the polymer adsorbent bed of mass w (g), and the removal% (R%) of the dye in the column was obtained from Equations (4)–(10), respectively 20

{normalV}_{efflu} = {normalQ}_{normalt} t

{normalC}_{ad} = {normalC}_{normalo} - {normalC}_{normalt}

{normalM}_{normalt} = \frac{{normalV}_{efflu} {normalC}_{normalo}}{1000},

{normalq}_{normalt} = \frac{{normalQ}_{normalt} A}{1000} = \frac{Q_{t}}{1000} \int_{0}^{normalt} {normalC}_{ad} dt

{normalC}_{normalt} = (\frac{M_{t} - q_{t}}{{normalV}_{efflu}}) x 100

{normalq}_{normale} = \frac{q_{t}}{normalw}

R ...

…”

Section: Methodsmentioning

confidence: 99%

“…In fact, at higher C o , the concentration gradient increases from the aqueous dye solution to the adsorbent polymer bed because of the concentration dependent diffusion in the fixed bed as also reported elsewhere. 20,34 The effect of different inlet dye flow rates (Q t ) on the column adsorption of the two dyes are shown in Figure 9B. In this case, the feed concentration (C o ) and bed height (h) were kept constant at 20 mm and 100 mg/L, respectively.…”

Section: Column Adsorptionmentioning

confidence: 99%

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Synthesis of copolymer nanocomposite by in situ intercalative polymerization for batch and fixed bed adsorption

Dutta

Ray

2023

Polymer Engineering & Sci

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Partially neutralized acrylic acid (AA)/sodium acrylate (NaAA) and N, N′‐methylenebisacrylamide (MBA) were subjected to intercalative copolymerization in aqueous solution of polyvinyl alcohol (PVA) in the presence of sodium montmorillonite (NaMMT) nano clay to prepare filled semi‐interpenetrating network (FSIPN) type composite polymer networks. Filled Full IPN (FFIPN) composites were prepared in a similar way by additional crosslinking of PVA with maleic acid (MA) crosslinker. The polymers were characterized with FTIR, NMR, XRD, TGA, SEM, EDAX, TEM, XPS, DLS, PZC, and pH reversibility test. The synthesis variables were optimized with respect to batch adsorption of 100 mg/L each of methyl violet (MV) and congo red (CR) dye as response using the central composite design (CCD) of response surface methodology (RSM). The FFIPN prepared from polyacrylic acid (PAA)/sodium polyacrylate containing PVA/Clay/MBA/MA of optimized composition of 4/1.5/0.75/4 (wt.% of AA/NaAA), respectively, showed an optimized adsorption (mg/g adsorbent) of 459.16/417.31 of MV/CR as single dye and 438.01/417.31 of MV/CR in 1:1 binary mixtures of 100 mg/L feed concentration. The FFIPN showed an adsorption (mg/g) of 41.54/37.61 and removal% of 88.5/80.12 at a feed flow rate, bed height, and feed inlet concentration of 20 mL/min, 20 mm, and 50 mg/L, respectively.

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Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

{normalV}_{efflu} = {normalQ}_{normalt} t

{normalC}_{ad} = {normalC}_{normalo} - {normalC}_{normalt}

{normalM}_{normalt} = \frac{{normalV}_{efflu} {normalC}_{normalo}}{1000},

{normalq}_{normalt} = \frac{{normalQ}_{normalt} A}{1000} = \frac{Q_{t}}{1000} \int_{0}^{normalt} {normalC}_{ad} dt

{normalC}_{normalt} = (\frac{M_{t} - q_{t}}{{normalV}_{efflu}}) x 100

{normalq}_{normale} = \frac{q_{t}}{normalw}

R ...

…”

Section: Methodsmentioning

confidence: 99%

Section: Column Adsorptionmentioning

confidence: 99%

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Synthesis of copolymer nanocomposite by in situ intercalative polymerization for batch and fixed bed adsorption

Dutta

Ray

2023

Polymer Engineering & Sci

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“…The solution pH, dose of the polymer, and initial concentration of tetracycline strongly influenced the efficiency of tetracycline removal. High regeneration and recyclability were among the benefits of nanocomposite adsorbent [ 77 ].…”

Section: Effective Methods Of Tetracycline Removal From the Aquatic E...mentioning

confidence: 99%

The Impact of Tetracycline Pollution on the Aquatic Environment and Removal Strategies

et al. 2023

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Antibacterial drugs are among the most commonly used medications in the world. Tetracycline is a widely used antibiotic for human and animal therapy due to its broad-spectrum activity, high effectiveness, and reasonable cost. The indications for treatment with tetracycline include pneumonia, bone and joint infections, infectious disorders of the skin, sexually transmitted and gastrointestinal infections. However, tetracycline has become a serious threat to the environment because of its overuse by humans and veterinarians and weak ability to degrade. Tetracycline is capable of accumulating along the food chain, causing toxicity to the microbial community, encouraging the development and spread of antibiotic resistance, creating threats to drinking and irrigation water, and disrupting microbial flora in the human intestine. It is essential to address the negative impact of tetracycline on the environment, as it causes ecological imbalance. Ineffective wastewater systems are among the main reasons for the increased antibiotic concentrations in aquatic sources. It is possible to degrade tetracycline by breaking it down into small molecules with less harmful or nonhazardous effects. A range of methods for physical, chemical, and biological degradation exists. The review will discuss the negative effects of tetracycline consumption on the aquatic environment and describe available removal methods.

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Poly(vinylidene fluoride‐hexafluoropropylene)/mesoporous graphitic carbon nitride composite membranes for photocatalytic methylene blue degradation and sensing applications

Sharma,

Kumar,

Yadav

2023

Polymer Engineering & Sci

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In this work, poly(vinylidene fluoride‐hexafluoropropylene) (PVDF‐HFP)/mesoporous graphitic carbon nitride (mpg‐C3N4) composite fiber web have been prepared and characterized for photocatalytic methylene blue (MB) degradation and sensing applications. The electrospinning technique, operating at a flow rate of 1 mL/h and a voltage of 15 kV, was utilized to prepare the composite membranes of PVDF‐HFP with the uniform distribution of the mpg‐C3N4. The composite web demonstrated outstanding photocatalytic activity for the degradation of MB, reaching a quick 68% drop in MB concentration in just 45 min. The composite web furthermore worked as a sensor for MB detection. After MB exposure, the film resistance was increased, suggesting its potential as a chemiresistive sensor. The maximum resistivity of PVDF‐HFP/mpg‐C3N4 composites was found to be 90 Ω·m at 2% concentration of MB. The MB molecules' adsorption on the surface of the composite web and the existence of photocatalytic byproducts on the surface may be responsible for this shift in resistance. This dual functionality highlights the adaptability and potential of the PVDF‐HFP/mpg‐C3N4 composite web as a versatile material for environmental sensing and cleanup. This research presents a comprehensive approach to the synthesis, characterization, and evaluation of such flexible membranes for potential applications as self‐cleaning devices and chemiresistive sensor.Highlights PVDF‐HFP/mpg‐C3N4 composite membranes act as an efficient material for MB degradation (68%) with visible light exposure. mpg‐C3N4 plays the role of active material in degradation. PVDF‐HFP/mpg‐C3N4 composite membrane also act as sensors for MB detection. Composite membrane becomes chemiresistive due to notable resistivity changes with MB concentration.

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Adsorption and photocatalytic degradation of tetracycline from water by kappa‐carrageenan and iron oxide nanoparticle‐filled poly (acrylonitrile‐co‐N‐vinyl pyrrolidone) composite gel

Cited by 7 publications

References 52 publications

Synthesis of copolymer nanocomposite by in situ intercalative polymerization for batch and fixed bed adsorption

Synthesis of copolymer nanocomposite by in situ intercalative polymerization for batch and fixed bed adsorption

The Impact of Tetracycline Pollution on the Aquatic Environment and Removal Strategies

Poly(vinylidene fluoride‐hexafluoropropylene)/mesoporous graphitic carbon nitride composite membranes for photocatalytic methylene blue degradation and sensing applications

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