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Removal of phenol and chlorophenols from water with reusable dye-affinity hollow fibers [An article from: Journal of Hazardous Materials]


by S. Senel, A. Kara, G. Alsancak, A. Denizli

List Price: $10.95
Available: Available for download now
Studio: Elsevier
Binding: Digital
Publication Date: November 16, 2006
Publisher: Elsevier


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Product Description
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Reactive Green HE 4BD carrying polyamide hollow fibers were investigated as dye-affinity adsorbents for removal of chlorophenols (i.e., phenol, o-chlorophenol, p-chlorophenol and 2,4,6-trichlorophenol). Adsorption rates of chlorophenols were very high. Equilibrium was achieved in about 30min. The applicability of two kinetic models including pseudo-first order and pseudo-second order model was estimated on the basis of comparative analysis of the corresponding rate parameters, equilibrium capacity and correlation coefficients. Results suggest that chemisorption process could be the rate-limiting step in the adsorption process. The maximum adsorption values of chlorophenols onto the Reactive Green HE 4BD carrying hollow fibers were 145.9@mmol/g for phenol, 179.2@mmol/g for 2,4,6-trichlorophenol, 194.5@mmol/g for p-chlorophenol and 202.8@mmol/g for o-chlorophenol. The affinity order was as follows: o-chlorophenol>p-chlorophenol>2,4,6-trichlorophenol>phenol. The adsorption capacity of chlorophenols decreased with increasing pH. Desorption of chlorophenols was achieved using methanol solution (30%, v/v). The Reactive Green HE 4BD-carrying hollow fibers are suitable for repeated use for more than 10 cycles without noticeable loss of adsorption capacity.
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