Adsorption of Cr(VI) and As(V) ions by modified magnetic chitosan chelating resin

El-Reash, Y.G. Abou; Otto, M. Alexander; Kenawy, Ibrahim M.; Ouf, A. M. A.

doi:10.1016/j.ijbiomac.2011.06.001

Cited by 165 publications

(53 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This complexation was manifested by gelation where the viscosity of some metal-CSsolutions increased dramatically as the pH of the solution changes. In general, reports showed that CS binding capacity was dependent on charge density, temperature and pH (Abou El-Reash et al, 2011). Being a transition element, Pt in Cis molecule can form an irreversible coordinate complex with CS amino groups (Cafaggi et al, 2007).…”

Section: Effect Of Drug Loading Methodsmentioning

confidence: 99%

Defining cisplatin incorporation properties in thermosensitive injectable biodegradable hydrogel for sustained delivery and enhanced cytotoxicity

Abdel-Bar

Abdel-Reheem

Osman

et al. 2014

International Journal of Pharmaceutics

View full text Add to dashboard Cite

Section: Effect Of Drug Loading Methodsmentioning

confidence: 99%

Defining cisplatin incorporation properties in thermosensitive injectable biodegradable hydrogel for sustained delivery and enhanced cytotoxicity

Abdel-Bar

Abdel-Reheem

Osman

et al. 2014

International Journal of Pharmaceutics

View full text Add to dashboard Cite

“…k F is the Freundlich constant and n is the heterogeneity factor. 28,[32][33][34][35][36][37][38][39] Moreover, the value of n in the Freundlich isotherm was in the range of 1-10, representing a good adsorption. The value of theoretical parameters and constants could be calculated from the intercept and slope of the linear equation, respectively.…”

Section: Effect Of the Initial Concentration Of Cr(vi) And Adsorptionmentioning

confidence: 99%

Synthesis of titanium cross-linked chitosan composite for efficient adsorption and detoxification of hexavalent chromium from water

et al. 2015

View full text Add to dashboard Cite

For the simultaneous adsorption and detoxification of hexavalent chromium from water, a new titaniumchitosan (Ti-CTS) composite was synthesized through a metal-binding reaction between titanium ions and the chitosan biopolymer followed by cross-linking with glutaraldehyde. The resultant composite was characterized by FT-IR, XRD, elemental mapping, SEM and XPS. The adsorption properties toward Cr(VI) were systematically investigated as a function of pH, dosage, initial concentration, contact time, temperature and co-existing ions. Experimental data were well described by the Langmuir isotherm and the pseudo-second order model with the maximum adsorption capacity of 171 mg g À1 . More attractively, the Cr(VI) could be effectively adsorbed and reduced to the less toxic Cr(III) by the Ti-CTS composite.The experimental results, FT-IR and XPS indicated that the possible removal mechanism of Cr(VI) onto the Ti-CTS composite was summarized into three steps: (i) Cr(VI) adsorption by electrostatic attraction (Ti 4+ and HCrO 4 À ) and ligand exchange (Cl À and HCrO 4 À ); (ii) Cr(VI) partly reduced to Cr(III); (iii) the re-adsorption of Cr(III) onto the Ti-CTS composite. Fig. 2 The wide scan XPS spectra of the Ti-CTS composite without (A) and with (B) Cr(VI) adsorbed; high resolution Cr 2p spectra of the Ti-CTS-Cr composite before (C) and after (D) desorption with NaOH. J. Mater. Chem. AThis journal is

show abstract

“…The maximum adsorption capacity of As(V) with PAEA nanofibers is also compared with other adsorbents, reported in the literatures [3,5,6,20] (Table 2). It can be seen that the maximum adsorption capacity of As(V) with PAEA nanofibers is higher than that with many other adsorbents, especially in small dosage and relative short equilibrium time.…”

Section: −1mentioning

confidence: 97%

“…Because of its harm to human health, it is necessary to develop new adsorbents with high adsorption ability for arsenic. Up to now, various adsorbents have been reported as materials for the adsorption of arsenic, such as modified natural zeolite [3], polymer fiber [4], nanoparticles [5], and modified magnetic chitosan chelating resin [6]. The adsorption efficiency of these adsorbents depends on the functional group(s) on their surfaces, which are effective in forming complexation or electrostatic interaction with arsenic.…”

mentioning

confidence: 99%

Efficient adsorption of As(V) on poly(acrylo-amidino ethylene amine) nanofiber membranes

2013

Chin. Sci. Bull.

View full text Add to dashboard Cite

Poly(acrylo-amidino ethylene amine) (PAEA) nanofiber membranes have been synthesized by combining the electrospinning technique and subsequent chemical modification. The membranes were used to remove As(V) from aqueous solution. The adsorption kinetics, equilibrium isotherms, and pH effect were investigated in batch experiments. The Langmuir isotherm and pseudo second-order kinetic models agree well with the experimental data. The PAEA nanofibers are effective for As(V) adsorption at pH 3. Experimental results showed that the maximum adsorption capacity of the PAEA nanofibers with As(V) is 76.92 mg g −1 , which is much higher than that of the PAEA microfibers (27.62 mg g −1 ). The adsorption rate of PAEA nanofibers is faster than that of PAEA microfibers due to its higher specific surface area. The PAEA nanofibers can be used as an effective adsorbent for the removal of As(V) in aqueous solution due to high adsorption capacity and short adsorption time to achieve equilibrium. adsorption, arsenic, electrospinning, polyacrylonitrile, nanofibers Citation:Vu D, Li X, Wang C. Efficient adsorption of As(V) on poly(acrylo-amidino ethylene amine) nanofiber membranes.

show abstract

Adsorption of Cr(VI) and As(V) ions by modified magnetic chitosan chelating resin

Cited by 165 publications

References 34 publications

Defining cisplatin incorporation properties in thermosensitive injectable biodegradable hydrogel for sustained delivery and enhanced cytotoxicity

Defining cisplatin incorporation properties in thermosensitive injectable biodegradable hydrogel for sustained delivery and enhanced cytotoxicity

Synthesis of titanium cross-linked chitosan composite for efficient adsorption and detoxification of hexavalent chromium from water

Efficient adsorption of As(V) on poly(acrylo-amidino ethylene amine) nanofiber membranes

Contact Info

Product

Resources

About