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Kayıt Tarihi: 2021-13-Ocak
Aktif Durum: Pasif
Gönderilenler: 30
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| Gönderen: 2021-20-Ocak Saat 06:38 | Kayıtlı IP
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Removal of chlorhexidine gluconate in presence of a
cationic surfactant using acid functionalized activated
carbon: Validation of multicomponent models
activated carbon
supplierCommercial antiseptic solutions containing
a mixture of antibacterial agents such as, chlorhexidine
gluconate, in presence of a cationic surfactant like
cetrimide, are commonly used as floor, toilet and kitchen
cleaning agents. Although a specific composition may be
beneficial for disinfecting human beings, these are toxic
to aquatic organisms, the plant biota and useful
microorganisms present in soil and in municipal sewer
pipes. In this study, functional modification of granular
activated carbon (GAC) is carried out with hydrochloric
and hydrofluoric acids in order to enhance the adsorption
capacity of GAC for simultaneous removal of both
chlorhexidine gluconate and cetrimide. Hydrofluoric acid
functionalized activated carbon shows highest removal of
both cetrimide and chlorhexidine gluconate (maximum
adsorption capacitypure component chlorhexidine gluconate
=349.0 g/g; maximum adsorption capacitypure component
cetrimide =23.0 g/g). Average removal of cetrimide by
GAC, FAC-HCl and FAC-HF are 36.64 %, 47.09 % and 75.74 %
respectively. Surface charge of modified activated
carbons is significantly altered as compared to
unmodified GAC which provided an enhanced net available
driving potential for the positive cetrimonium ions to
reach the surface much faster as compared to the bulky
chlorhexidine gluconate molecules. Cetrimide then
undergoes pure physical adsorption through pore
diffusion. However, chlorhexidine gluconate forms surface
complexes with the functional groups as confirmed by the
relative quantities of oxygenated surface functional
groups and Fourier Transform Infrared (FT-IR) analysis.
-carbon-pellets/">wanyang activated carbon pellets
Intraparticle diffusion and Boyd plots show that film
diffusion and not intraparticle diffusion is the rate
controlling step.
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Konu: Using acid functionalized activated carbo
