Adsorption of Cr (VI) Oxyanions onto Modified Wood Pulp |
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Authors: | E. S. Abdel-Halim A. Abou-Okeil |
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Affiliation: | National Research Centre, Textile Research Division , Dokki, Cairo, Egypt |
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Abstract: | A new adsorbent was prepared from wood pulp (WP) after reaction with epichlorohydrin and dimethylamine in the presence of pyridine and N,N-dimethylformamide (DMF). The adsorption of Cr (VI) from aqueous solutions by the so-prepared wood pulp adsorbent (WP-A) was investigated. Various factors affecting adsorption, such as pH, adsorbent concentration (1–5 g/L), agitation time (5–60 min), and Cr (VI) concentration (50–700), were taken into consideration. The adsorption of Cr (VI) onto (WP-A) was found to be pH-dependent and maximum adsorption was obtained at pH 3. The adsorption data obeyed Langmuir and Freundlich adsorption isotherms. The Langmuir adsorption capacity (Qmax) was found to be 588.24 mg/g. Freundlich constants, KF and n, were found to be 55.03 and 2.835, respectively. |
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Keywords: | Cr (VI) oxyanion Wood pulp Adsorption isotherm |
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