Adsorption of zinc from aqueous solution using marine green algae-Ulva fasciata sp. [An article from: Chemical Engineering Journal]

This digital document is a journal article from Chemical Engineering Journal, published by Elsevier in 2007. 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:
The removal of zinc from aqueous solution by adsorption on Ulva fasciata sp. was studied as a function of contact time, pH of the solution, metal ion concentration, adsorbent concentration and adsorbent size. Batch experiments results showed that the adsorptive capacity of U. fasciata sp. was 13.5mg/g of adsorbent. The Langmuir and Freundlich models were used to describe the adsorption equilibrium of zinc on U. fasciata sp. and the adsorption followed the Langmuir isotherm. The Langmuir and Freundlich constants for adsorption of zinc on U. fasciata sp. were determined. The pseudo first and second order rate expressions were used to correlate the experimental data. The kinetic constants were determined for both the models and the second order rate expression was found to be more suitable.