The saga of development of plastic surgery at K. G.’sMedical University

Bhatnagar, S. K.; Kumar, Singh Arun

doi:10.1055/s-0039-1699160

Cited by 4 publications

(5 citation statements)

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“…328 The amount of cationic dyes, such as methyl violet and methylene blue, adsorbed increased with the pH due to the electrostatic attraction between the negatively charged surface of the CNT adsorbents and the positively charged cationic dyes. 329,330 The oxidation of the CNTs with KMnO 4 and H 2 O 2 exhibited little enhancement in the specific area, while HNO 3 oxidation provided a larger specific area. 325 A few studies are available detailing SWNTs with antimicrobial activity towards Gram-positive and Gram-negative bacteria due to either a physical interaction or oxidative stress that compromises the cell membrane integrity.…”

Section: (F) Carbon Nanomaterialsmentioning

confidence: 99%

A review on nanomaterials for environmental remediation

Khin

Nair

Babu

et al. 2012

Energy Environ. Sci.

1,295

537

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This article gives an overview of the application of nanomaterials in environmental remediation. In the area of environmental remediation, nanomaterials offer the potential for the efficient removal of pollutants and biological contaminants. Nanomaterials in various shapes/morphologies, such as nanoparticles, tubes, wires, fibres etc., function as adsorbents and catalysts and their composites with polymers are used for the detection and removal of gases (SO 2 , CO, NO x , etc.), contaminated chemicals (arsenic, iron, manganese, nitrate, heavy metals, etc.), organic pollutants (aliphatic and aromatic hydrocarbons) and biological substances, such as viruses, bacteria, parasites and antibiotics. Nanomaterials show a better performance in environmental remediation than other conventional techniques because of their high surface area (surface-to-volume ratio) and their associated high reactivity. Recent advances in the fabrication of novel nanoscale materials and processes for the treatment of drinking water and industrial waste water contaminated by toxic metal ions, radionuclides, organic and inorganic solutes, bacteria and viruses and the treatment of air are highlighted. In addition, recent advances in the application of polymer nanocomposite materials for the treatment of contaminants and the monitoring of pollutants are also discussed. Furthermore, the research trends and future prospects are briefly discussed.

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Section: (F) Carbon Nanomaterialsmentioning

confidence: 99%

A review on nanomaterials for environmental remediation

Khin

Nair

Babu

et al. 2012

Energy Environ. Sci.

1,295

537

View full text Add to dashboard Cite

show abstract

“…Among all of the treatments proposed, the sorption of dye molecules onto a substrate (sorbent) can be a very effective, low-cost method of color removal. [1][2][3] Activated carbon is the most commonly used method of dye removal by sorption, although the performance is dependent on the type of carbon used, the characteristics of the wastewater, and the type of dye. However, the cost and regeneration difficulties of the sorbent have compelled researchers to focus on alternative low-cost sorbents.…”

Section: Introductionmentioning

confidence: 99%

“…Several methods have been developed to remove color from dyehouse effluents, varying in effectiveness, economic cost, and environmental impact (of the treatment process itself). Among all of the treatments proposed, the sorption of dye molecules onto a substrate (sorbent) can be a very effective, low-cost method of color removal. − …”

Section: Introductionmentioning

confidence: 99%

Chitosan Derivatives as Biosorbents for Basic Dyes

et al. 2007

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The scope of this study was to prepare and evaluate chitosan derivatives as biosorbents for basic dyes. This was achieved by grafting poly (acrylic acid) and poly (acrylamide) through persulfate induced free radical initiated polymerization processes and covalent cross-linking of the prepared materials. Remacryl Red TGL was used as the cationic dye. Equilibrium sorption experiments were carried out at different pH and initial dye concentration values. The experimental equilibrium data for each adsorbent-dye system were successfully fitted to the Langmuir, Freundlich and pH-dependent Langmuir-Freundlich sorption isotherms. Thermodynamic parameters of the adsorption process such as DeltaG degrees, DeltaH degrees, and DeltaS degrees were calculated. The negative values of free energy reflected the spontaneous nature of adsorption. The typical dependence of dye uptake on temperature and the kinetics of adsorption indicated the process to be chemisorption. The grafting modifications greatly enhanced the adsorption performance of the biosorbents, especially in the case of powdered cross-linked chitosan grafted with acrylic acid, which exhibited a maximum adsorption capacity equal to 1.068 mmol/g. Kinetic studies also revealed a significant improvement of sorption rates by the modifications. Diffusion coefficients of the dye molecule were determined to be of the order 10(-13) - 10(-12) m2/s. Furthermore, desorption experiments affirmed the regenerative capability of the loaded material.

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“…Thin layer chromatography (TLC) and solid phase extraction (SPE) are the most common and cheapest purification techniques. SPE is conducted on a variety of adsorbents, like activated carbon, silica gel, zeolites and ion exchange resins [6]. Depending on the matrix, the samples can be cleaned to get nearly pure compounds.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of metal organic framework (MOF-5) embedded cryogel composite and its application for the extraction and determination of cholesterol from milk samples

et al. 2021

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Metal-organic frameworks (MOFs)/coordination polymers (CPs) are a new class of hybrid inorganic/organic porous material. Recently MOFs have attracted much attention due to their large surface area, tunable pore structure, and high thermal stability. MOF-5 is composed of zinc salt and 1,4 benzene dicarboxylic linker. In the current study, MOF-5/cryogel composite was applied to extract cholesterol selectively from milk samples. This extraction process was used to clean-up milk samples with MOF-5/cryogel composite followed by determination of cholesterol in milk using UV-Vis spectrophotometric technique. The parameters such as concentration of cholesterol, volume of cholesterol solution, adsorbent amount, adsorption and desorption time were studied to obtain good extraction of cholesterol. The amount of cholesterol adsorbed and desorbed was 84 and 80%, respectively, from milk samples using MOF-5 composite cryogel. The developed method was validated in terms of linearity, accuracy, precision, limit of detection, and quantification. The response was linear in the range of 5-200 µg/mL with a coefficient of determination (r2) of 0.990. Detection limit (0.15 µg/mL) and quantification (0.45 µg/mL) were obtained.

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The saga of development of plastic surgery at K. G.’sMedical University

Cited by 4 publications

References 0 publications

A review on nanomaterials for environmental remediation

A review on nanomaterials for environmental remediation

Chitosan Derivatives as Biosorbents for Basic Dyes

Synthesis of metal organic framework (MOF-5) embedded cryogel composite and its application for the extraction and determination of cholesterol from milk samples

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