Use of Rhizopus oligosporus produced from food processing wastewater as a biosorbent for Cu(II) ions removal from the aqueous solutions.

Abstract:

:Dried biomass of Rhizopus oligosporus produced from food processing wastewater was used as an adsorbent for copper ions in water. The adsorption process was carried out in a batch process and the effects of contact time (1-48 h), initial pH (2.0-6.0), initial metal ion concentration (20-100 mg L(-1)) and temperature (20-38 degrees C) on the adsorption were investigated. Experimental results showed that the maximum adsorption capacity was achieved at pH 5.0 and adsorbed Cu(II) ion concentration was increased with increasing initial metal concentration and contact time. The isothermal data could be described well by the Langmuir equations and monolayer capacity had a mean value of 79.37 mg g(-1). A pseudo-second order reaction model provided the best description of the data with a correlation coefficient 0.99 for different initial metal concentrations. Thermodynamic parameters indicated that biosorption of Cu(II) on R. oligosporus dried biomass was exothermic and spontaneous. To observe the copper pellets on the biosorbent surface after biosorption SEM was used and copper was characterized by EDX. The results of FTIR analyses indicated that amide I and hydroxyl groups of adsorbent played important role in binding Cu(II).

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Ozsoy HD,Kumbur H,Saha B,van Leeuwen JH

doi

10.1016/j.biortech.2007.09.017

subject

Has Abstract

pub_date

2008-07-01 00:00:00

pages

4943-8

issue

11

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(07)00759-6

journal_volume

99

pub_type

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