Adsorption of hexa-valent chromium using treated wood charcoal--elucidation of rate-limiting process.

Clicks: 260
ID: 2918
2010
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Star

Ranked #30 of 98 articles by views in environmental technology

Most read Least read

Bar heights use a square-root scale.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
In the present study, locally available wood charcoal was used as an adsorbent to remove Cr (VI) from water. It was found to be giving poor removal efficiency whereby only 19% of Cr (VI) was removed. Considering the fact that wood charcoal possesses a honeycomb structure, an acid treatment was tried with HCl, H2SO4 and HNO3. Treatment with concentrated hydrochloric acid has improved the removal efficiency of wood charcoal to 94%. Kinetic studies were carried out with various systemic parameters, namely initial Cr (VI) concentration (0.5, 1, 2 mg/L), adsorbent size (0.11, 0.18, 0.25, 0.36, 0.51 mm) and agitation speed (130 to 180 rpm) to understand and determine the equilibrium time, order of reaction, rate constants, diffusion coefficients, and to determine the maximum adsorption capacity and also the rate limiting process. It was found that the uptake of Cr (VI) onto wood charcoal reached equilibrium within the first 6 h of contact time. Isothermal studies explained by using the Freundlich model revealed that the maximum adsorptive capacity (Q(max)) of the treated wood charcoal is 677 microg/g, which is well within the standard/feasible value for a wood-based charcoal. The process limiting the rate of adsorption (rate limiting step) was analyzed using the kinetic data as well as using various systemic parameters such as initial Cr (VI) concentration, adsorbent size, and agitation speed was finally confirmed by the multiple interruption test. It was concluded that the adsorption process was controlled by film diffusion.
Reference Key
chaithanyaa2010adsorptionenvironmental Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Chaithanyaa, T K;Yedla, Sudhakar;
Journal environmental technology
Year 2010
DOI
10.1080/09593331003777144
URL
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.