Paper Title:
Comparative Study between Natural and Artificial Zeolites as Supports for Biosorption Systems
  Abstract

This study aims the definition of a new material that may act as a robust and yet cost effective biosorbent for treatment of wastewater with low concentration of heavy metals. A comparative study was made between two biosorption systems composed of an Arthrobacter viscosus biofilm supported on Cuban natural zeolites and on prepared NaY and NaX, in terms of their ability to retain ionic chromium. The bacterium is able to reduce Cr(VI) to Cr(III) and, only then, this smaller and positive ion may be entrapped in the zeolite cages by ion exchange. The first support was tested in a continuous flow semi-packed bed column. The highest removal ratio, 42%, was achieved for initial chromium concentration of 10 mg/L, but the best up-take, 5.5 mg/gzeolite, was obtained for initial concentration of 70 mg/L. Biosorbents prepared with the same biofilm supported in NaY and NaX zeolites were also considered in batch studies, with a typical kinetics of biosorption processes, reaching 20% of initial chromium removal within an initial range of Cr(VI) concentration between 50 and 250 mg/L. These last structures were characterized by spectroscopic methods (FTIR and ICP-AES), surface analysis (DRX) and thermal analysis (TGA). All these techniques indicated that the biosorption process does not modify the morphology and structure of the FAU-zeolites.

  Info
Periodical
Materials Science Forum (Volumes 514-516)
Edited by
Paula Maria Vilarinho
Pages
1294-1298
DOI
10.4028/www.scientific.net/MSF.514-516.1294
Citation
M. T. Tavares, C. Quintelas, H. Figueiredo, I. Neves, "Comparative Study between Natural and Artificial Zeolites as Supports for Biosorption Systems", Materials Science Forum, Vols. 514-516, pp. 1294-1298, 2006
Online since
May 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: B. Silva, Hugo Figueiredo, Cristina Quintelas, I.C. Neves, T. Tavares
Abstract:The removal of metallic ions from binary aqueous solutions of Fe(III)/Cr(III) and Fe(III)/Cr(VI) by an Arthrobacter viscosus biofilm...
463
Authors: V.O. Vasylechko, Ch.B. Korpalo, G.V. Gryshchouk
Chapter 1: Technology of the Active Media of Electronic Engineering
Abstract:The sorption properties of acid-modified Transcarpathian clinoptilolite towards Sc (III) under dynamic conditions have been studied. It was...
8
Authors: Vitalii Petranovskii, Maria Khrepoun, Andrey Efimov, Alexey Pestryakov
Chapter 2: Material Engineering and Technologies
Abstract:The removal and recuperation of copper from the residual liquors of galvanic industry by ion exchange have been studied using the natural...
169
Authors: Hui Mu, Yu Xiao Zhao, Min Tian Gao, Xiao Dong Zhang, Jie Zhang, Yan Li
Chapter 10: Pollution Control Project (Air, Water, Solid)
Abstract:Fe-containing compound clinoptilolite media (Fe-M), prepared with natural clinoptilolite, was applied to be the filter media of BAF, and then...
579