Hybrid nanoadsorbents for the magnetically assisted removal of metoprolol from water

Soares, Sofia F.; Simões, Tânia R.; António, Maria; Trindade, Tito; Daniel‐da‐Silva, Ana L.

doi:10.1016/j.cej.2016.05.079

Cited by 55 publications

(27 citation statements)

References 52 publications

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“…The band at 1558 cm −1 is ascribed to N-H bending modes coupled to C-N stretching, which confirms the covalent bonding between the carrageenan and the siliceous network through a urethane linkage [61,62]. The band at 1645 cm −1 can be either ascribed to adsorbed water (H 2 O bending mode) or due to the stretching vibration of hydrogen-bonded C=O in urea, [63] thus indicating the coexistence of urea and urethane groups in the hybrid shells [50,51,55,60]. (Figure 1e).…”

Section: Characterization Of the Magnetic Nanocarriersmentioning

confidence: 71%

“…In the past few years, our research group has developed a new strategy for the preparation of core/shell spheroidal nanoparticles, comprising magnetite cores (Fe 3 O 4 ) coated with amorphous silica shells [50], or with siliceous shells enriched in polymers from renewable sources including starch [51], alginate [52], chitosan [53,54] and carrageenan [51,55]. We aimed at creating magnetic bionanocomposites whose ability to interact with target molecular species depends on the chemical functionalities of the shells.…”

Section: Characterization Of the Magnetic Nanocarriersmentioning

confidence: 99%

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Magnetic Driven Nanocarriers for pH-Responsive Doxorubicin Release in Cancer Therapy

et al. 2020

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Doxorubicin is one of the most widely used anti-cancer drugs, but side effects and selectivity problems create a demand for alternative drug delivery systems. Herein we describe a hybrid magnetic nanomaterial as a pH-dependent doxorubicin release carrier. This nanocarrier comprises magnetic iron oxide cores with a diameter of 10 nm, enveloped in a hybrid material made of siliceous shells and ĸ-carrageenan. The hybrid shells possess high drug loading capacity and a favorable drug release profile, while the iron oxide cores allows easy manipulation via an external magnetic field. The pH responsiveness was assessed in phosphate buffers at pH levels equivalent to those of blood (pH 7.4) and tumor microenvironment (pH 4.2 and 5). The nanoparticles have a loading capacity of up to 12.3 wt.% and a release profile of 80% in 5 h at acidic pH versus 25% at blood pH. In vitro drug delivery tests on human breast cancer and non-cancer cellular cultures have shown that, compared to the free drug, the loaded nanocarriers have comparable antiproliferative effect but a less intense cytotoxic effect, especially in the non-cancer cell line. The results show a clear potential for these new hybrid nanomaterials as alternative drug carriers for doxorubicin.

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Section: Characterization Of the Magnetic Nanocarriersmentioning

confidence: 71%

Section: Characterization Of the Magnetic Nanocarriersmentioning

confidence: 99%

Magnetic Driven Nanocarriers for pH-Responsive Doxorubicin Release in Cancer Therapy

et al. 2020

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“…The high adsorption capacity of 447 mg g −1 was obtained at pH 7 and in 15 min. The FTIR results revealed that the adsorption of metoprolol on the surface of nanoadsorbent occurred via electrostatic interaction between the sulphonate group of nanoadsorbent and protonated amine group of metoprolol . Similarly, Fakhri and his co‐workers reported MgO nanoparticles for removal of Cephalosporins (antibiotic) from aqueous solution.…”

Section: Removal Of Organic Contaminants Using Nanomaterialsmentioning

confidence: 92%

Recent Progress in Nanomaterials for Adsorptive Removal of Organic Contaminants from Wastewater

2020

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Water being most vital component of life is getting contaminated due to inhuman disposal of toxicants in water bodies. Organic compounds such as dyes, pharmaceuticals/drugs, pesticides etc. are used for various purposes and become life threatening when dumped in water bodies without pre‐treatment. Removal of these toxicants from environment is complicated but highly essential for sustainable development. Various methods have been used for this purpose among which adsorption is the most simple, fast, effective and inexpensive method for the removal of such contaminants. Nanomaterial proved to be one of the best adsorbent due to its unique structural properties which provides large surface area and high adsorption capacity. The factors affecting adsorption along with adsorption mechanism is discussed in detail. Detection of the pollutants is also quite tedious work as pollutants are present in trace quantity. UV‐Visible spectrophotometry is widely used detection technique which is easy to operate, produce accurate results and cheap. The review emphasizes the use of nanomaterial as adsorbents for the removal of various organic pollutants from wastewater using UV‐Visible spectrophotometry.

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“…Also carbon‐based Fe 3 O 4 adsorbents were investigated for removal of cationic dyes from aqueous solution, such as methylene blue (MB), neutral red, fuchsine and cresyl blue , . Surface coatings made of biopolymers have also been used to functionalize Fe 3 O 4 NPs in order to remove organic compounds dissolved in water , . In these adsorbents, free side chain groups of biopolymers are available for chemical interactions with molecular contaminants.…”

Section: Magnetic Nanosorbentsmentioning

confidence: 99%

“…In these adsorbents, free side chain groups of biopolymers are available for chemical interactions with molecular contaminants. Several studies have demonstrated that magnetic‐polymer nanocomposites are promising for the uptake of organic dyes and heavy metal ions . For example, poly(c‐glutamic acid) coated iron oxide NPs (PGA‐MNPs) have been explored as adsorbents for methylene blue .…”

Section: Magnetic Nanosorbentsmentioning

confidence: 99%

Functionalized Inorganic Nanoparticles for Magnetic Separation and SERS Detection of Water Pollutants

et al. 2018

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Inorganic nanoparticles (NPs) have emerged in the last decades as key materials for a number of technologies. In particular, noble metal (Ag, Au) and iron oxide NPs have revealed important applications due to their plasmonic and magnetic properties, respectively. Among these applications, this review provides, on one hand, an overview on the use of colloidal metal NPs in surface enhanced Raman scattering (SERS) chemical analysis and, on the other hand, the application of iron oxides as a new class of nanosorbents for water pollutants. These distinct types of NPs are the main building blocks to produce [a] Raman spectroscopy is a powerful analytical tool for chemical characterization, providing information about molecular structure, surface processes, and interface reactions. [31,32] Raman spectroscopy is based on the inelastic scattering of photons by chemical species and materials (Raman scattering). Among the incident photons that hit the sample only a small portion is inelastically scattered, i.e. comes out at a different frequency from the incident light. The spectral information is based on the detection of these scattered photons that are recorded as energy shifts (Raman shifts) from the wavenumber of the elastic scattered photons (Rayleigh scattering). Each band in the Raman spectrum can be assigned to a vibrational mode (or Paula

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Hybrid nanoadsorbents for the magnetically assisted removal of metoprolol from water

Cited by 55 publications

References 52 publications

Magnetic Driven Nanocarriers for pH-Responsive Doxorubicin Release in Cancer Therapy

Magnetic Driven Nanocarriers for pH-Responsive Doxorubicin Release in Cancer Therapy

Recent Progress in Nanomaterials for Adsorptive Removal of Organic Contaminants from Wastewater

Functionalized Inorganic Nanoparticles for Magnetic Separation and SERS Detection of Water Pollutants

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