alexa Efficiency of succinylated-olive stone biosorbent on the removal of cadmium ions from aqueous solutions.
Chemical Engineering

Chemical Engineering

Journal of Advanced Chemical Engineering

Author(s): Aziz A, Elandaloussi el H, Belhalfaoui B, Ouali MS, De Mnorval LC

Abstract Share this page

Abstract Chemical functionalization of olive stone wastes with succinate linkers can potentially improve the performance of wastewater treatment technologies via enhanced adsorption and high affinity of the covalently attached succinate groups for heavy metals. In this study, a novel reusable adsorbent material based on agricultural waste has been synthesized by esterifying the lignocellulosic matrix of olive stones with succinic anhydride in toluene under basic conditions. Characterization of the as-prepared material by FTIR and solid-state MAS (13)C NMR spectroscopies and TGA confirmed that the heterogeneous esterification has proceeded very efficiently to yield the succinylated-olive stone (S-OS). Subsequent alkaline treatment of S-OS with saturated NaHCO(3) aqueous solution led to the resulting sodic material (NaS-OS), which was subjected to batch experiments in order to evaluate its cadmium-removing efficiency from aqueous solutions at realistic concentrations of cadmium found in industrial effluents. The results obtained from the sorption characteristics have revealed that NaS-OS material is highly effective in removing cadmium from aqueous solutions, with a maximum uptake capacity of 200 mg g(-1) (1.78 mmol g(-1)). The Langmuir isotherm model was found to fit adequately the equilibrium isotherm data. Cadmium adsorption occurs rapidly and the adsorption mechanism is a chemical sorption via ionic exchange between the adsorbate and adsorbent. Thermodynamic parameters were also evaluated from the effect of temperature studies. Regenerability of NaS-OS material was ascertained by quantitative desorption of cadmium with 1M aqueous NaCl and the reusability of the matrix after five repeated cycles led to nearly no attenuation in its performance (less than 2\% in the sorption capacity), indicating that repeated use of NaS-OS is quite feasible. Compared to other low-cost adsorbents utilized for the removal of Cd(II) from water/wastewater, NaS-OS shows higher sorption capacity. These results have important implications for the design of low-cost adsorbents based on agricultural wastes. This article was published in Colloids Surf B Biointerfaces and referenced in Journal of Advanced Chemical Engineering

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

  • 6th World Congress on Biopolymers
    September 7-9, 2017 Paris, France
  • 2nd Euro Global Summit and Expo on Biomass
    September 21-22, 2017 Madrid, Spain
  • 7th International Congress on Biofuels and Bioenergy
    October 2-4, 2017 Toronto, Canada
  • 3rd International Conference on Chemical Engineering
    October 2-4, 2017 Chicago, USA
  • 7th International Conference and Exhibition on Biopolymers and Bioplastics
    October 19-21, 2017 San Francisco, USA
  • 6th International Congress on Biofuels, Bioenergy and Bioeconomy
    December 04-06, 2017 Sao Paulo, Brazil
Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version