Rapid and efficient removal of fluoride ions from aqueous solution using a polypyrrole coated hydrous tin oxide nanocomposite

Parashar, Kamya; Ballav, Niladri; Debnath, Sushanta; Pillay, Kriveshini; Maity, Arjun

doi:10.1016/j.jcis.2016.05.013

Cited by 59 publications

(24 citation statements)

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“…The effects of solution pH and adsorbent dosage are necessary studies for sorption experiments. The study of these factors helps establish the optimum pH and adsorbent dosage; that is, the pH and adsorbent dosage at which the highest removal percentage or capacity is attained [ 12 ]. As a result, pH values of 7.5 and 2 were chosen as optimum pH to remove Co 2+ metal ions and TCE pollutants, respectively, while the optimum adsorbent dosage for removing TCE and Co 2+ were 0.0005 g and 0.1 g, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Nanobiocomposite Polymer as a Filter Nanosponge for Wastewater Treatment

et al. 2021

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A multifunctional nanobiocomposite polymer was developed in this study through a cross-linking polymerization of cyclodextrin with phosphorylated multi-walled carbon nanotubes followed by sol-gel to incorporate TiO2 and Ag nanoparticles. This work’s novelty was to prove that the developed nanobiocomposite polymer is a potential filter nanosponge capable of removing organic, inorganic, and microorganisms’ pollutants from wastewater samples. The synthesized multifunctional nanobiocomposite polymer was characterized using a range of spectroscopy and electron microscopy techniques. Fourier-transform infrared (FTIR) confirmed the presence of oxygen-containing groups on the developed nanobiocomposite polymer and carbamate linkage (NH(CO)) distinctive peak at around 1645 cm−1, which is evidence that the polymerization reaction was successful. The scanning electron microscopy (SEM) image shows that the developed nanobiocomposite polymer has a rough surface. The Dubinin–Radushkevich and the pseudo-second-order kinetic models best described the adsorption mechanism of Co2+ and TCE’s onto pMWCNT/CD/TiO2-Ag. The efficacy of the developed nanobiocomposite polymer to act as disinfectant material in an environmental media (e.g., sewage wastewater sample) compared to the enriched media (e.g., nutrient Muller Hinton broth) was investigated. From the results obtained, in an environmental media, pMWCNT/CD/TiO2-Ag nanobiocomposite polymer can alter the bacteria’s metabolic process by inhibiting the growth and killing the bacteria, whereas, in enriched media, the bacteria’s growth was retarded.

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Section: Resultsmentioning

confidence: 99%

“…The initial increase in capacity with contact time can be explained by the fast rate of adsorbate (Co 2+ and TCE) diffusion on to adsorbent as the contact time increased. Once the sorption sites on the adsorbent are saturated with the adsorbate species, equilibrium is reached [ 4 , 12 ].…”

Section: Resultsmentioning

confidence: 99%

Nanobiocomposite Polymer as a Filter Nanosponge for Wastewater Treatment

et al. 2021

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“…The increase in the dose of the PPy/Co 3 O 4 /AgCl composite significantly influenced the adsorption efficiency because of the increase in the number of active sites available for the adsorbent. Similarly, the effect of the adsorbent dose on chromium removal was investigated by Parashar et al .…”

Section: Resultsmentioning

confidence: 99%

Preparation of doped polypyrrole composites as effective chromium ion absorbents

Zhou

Sun

2017

Polymer Composites

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A novel Co 3 O 4 -and AgCl-doped three-dimensional architectures polypyrrole (PPy/Co 3 O 4 /AgCl) composite was demonstrated as an excellent adsorbent to remove chromium effectively by an in situ oxidation polymerization using FeCl 3 as the oxidant. The achieved adsorption capacity was 69.9 mg g 21 . The as-synthesized PPy/ Co 3 O 4 /AgCl composite is suitable for chromium adsorption in a wide pH range. A chemical rather than a physical adsorption occurred for these adsorbents as revealed by a pseudo-second-order kinetic study. The results of the adsorption isotherms showed that the adsorption process was similar to the Langmuir isotherm adsorption. Furthermore, the PPy/Co 3 O 4 /AgCl composite exhibited a high stability for chromium adsorption during recycling tests process. POLYM. COMPOS., 00:000-000,

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“…As pure polymers and inorganic hosts, polymer composites with larger surface area and shorter diffusion route lengths have good adsorption capabilities. 43,44,72 2.4.1 Polypyrrole/common metallic oxide composites. PPy/ metallic oxide nanocomposites in various forms, sizes, and shapes have recently been employed for the adsorption of uoride ions from wastewater or an aqueous solution.…”

Section: Polypyrrole/inorganic Nanocompositesmentioning

confidence: 99%