Enhanced removal of Cd(II) from water using sulfur-functionalized rice husk: Characterization, adsorptive performance and mechanism exploration

Enhanced removal of Cd(II) from water using sulfur-functionalized rice husk: Characterization,... By grafting sulfur-bearing groups onto rice husk with magnesium xanthate, a novel biosorbent (RH-M) was synthesized for removal of cadmium from water. New sulfur containing binding sites were achieved efficiently according to Fourier Transform Infrared Spectroscopy and elemental analysis, and the alternation of surface morphology of RH-M was presented by Scanning Electron Microscopy. The adsorption performance of xanthate-modified biosorbent including adsorbent dosage effect, pH-dependence, kinetic curves and equilibrium isotherms were systematically investigated. The Cd(II) adsorption of RH-M was found to follow Langmuir isotherm model with maximum adsorption capacity of 137.16 mg g−1, significantly higher than that of many other reported adsorbents. The high-density sulfur-bearing groups on the functionalized rice husk surface are believed to improve the cadmium uptake due to a combination of ion exchange and chelation. Moreover, RH-M exhibited fast Cd(II) uptake ability in an exceptionally high correlation with pseudo-second-order kinetic model. Besides, Desorption experiments demonstrated that 0.5 M HNO3 solution could effectively desorb Cd(II) from the biosorbent with recovery rate up to 75% after four consecutive cycles. All these results recommend RH-M as a promising biosorbent for cadmium removal in aqueous solution. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Pure and Applied Algebra Elsevier

Enhanced removal of Cd(II) from water using sulfur-functionalized rice husk: Characterization, adsorptive performance and mechanism exploration

Loading next page...
 
/lp/elsevier/enhanced-removal-of-cd-ii-from-water-using-sulfur-functionalized-rice-EgCdAzioO0
Publisher
North-Holland
Copyright
Copyright © 2018 Elsevier Ltd
ISSN
0022-4049
D.O.I.
10.1016/j.jclepro.2018.02.208
Publisher site
See Article on Publisher Site

Abstract

By grafting sulfur-bearing groups onto rice husk with magnesium xanthate, a novel biosorbent (RH-M) was synthesized for removal of cadmium from water. New sulfur containing binding sites were achieved efficiently according to Fourier Transform Infrared Spectroscopy and elemental analysis, and the alternation of surface morphology of RH-M was presented by Scanning Electron Microscopy. The adsorption performance of xanthate-modified biosorbent including adsorbent dosage effect, pH-dependence, kinetic curves and equilibrium isotherms were systematically investigated. The Cd(II) adsorption of RH-M was found to follow Langmuir isotherm model with maximum adsorption capacity of 137.16 mg g−1, significantly higher than that of many other reported adsorbents. The high-density sulfur-bearing groups on the functionalized rice husk surface are believed to improve the cadmium uptake due to a combination of ion exchange and chelation. Moreover, RH-M exhibited fast Cd(II) uptake ability in an exceptionally high correlation with pseudo-second-order kinetic model. Besides, Desorption experiments demonstrated that 0.5 M HNO3 solution could effectively desorb Cd(II) from the biosorbent with recovery rate up to 75% after four consecutive cycles. All these results recommend RH-M as a promising biosorbent for cadmium removal in aqueous solution.

Journal

Journal of Pure and Applied AlgebraElsevier

Published: Sep 1, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial