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Molecular Characterization of Methicillin-Resistant Staphylococcus aureus Isolates in Three Different Arab Countries.
No full textMicrobiolog
تدخل المحكمة للمساعدة في توفير أدلة الإثبات واتخاذ الإجراءات الوقتية والتحفظية في أثناء سير إجراءات التحكيم: دراسة تحليلية مقارنة بين القانونين الفلسطيني والأردني
No full textLaw and Judiciar
Chitosan fiber-supported zero-valent iron nanoparticles as a novel sorbent for sequestration of inorganic arsenic
No full textNesrin,Horzum:Izmir Katip Celebi Universitesi
Muath,Nairat:Michigan State University
Mustafa,Demir:Izmir Institute of TechnologyThis study proposes a new sorbent for the removal of inorganic arsenic from aqueous solutions.
Monodispersed nano zero-valent iron (nZVI) particles were nucleated at the surface of electrospun
chitosan fibers (average fiber diameter of 195 ¡ 50 nm) by liquid phase reduction of FeCl3 using NaBH4.
The material was characterized using SEM, TGA, XPS, XRD, and FTIR. The diameter of iron nanoparticles
was found to vary between 75–100 nm. A set of batch experiments were carried out to elucidate the
efficiency of the composite sorbent toward fixation of arsenite and arsenate ions. The ion concentrations
in the supernatant solutions were determined using inductively coupled plasma-mass spectrometry (ICPMS).
The results revealed that the chitosan fiber supported nZVI particles is an excellent sorbent material
for inorganic arsenic uptake at concentrations ranging from 0.01 to 5.00 mg L21 over a wide range of pH
values. Based on XPS analysis, As(III) was found to undergo oxidation to As(V) upon sorption, while As(V)
retained its oxidation state. By virtue of the successful combination of the electrospun fibers’ mechanical
integrity and the large reactivity of dispersed nZVI particles, the applicability of the resulting sorbent
material in arsenic sorption holds broad promis
