Effect of pH on nickel biosorption by aerobic granular sludge.

Abstract:

:The Ni2+ biosorption by aerobic granular sludge was studied at various initial pH values of 2-7. Results showed that the initial pH would play an important role in the Ni2+ removal by aerobic granules and affected the zeta potential of aerobic granules. A thermodynamic equilibrium isotherm previously developed can fit the experimental data very well at all studied pH values. The close relationship between the zeta potential and Ni2+ biosorption capacity of aerobic granules showed the electrostatic attraction between the aerobic granules and Ni2+ ions. It was also found that some light metals, such as K+, Mg2+ and Ca2+ would be released into the bulk solution during the Ni2+ uptake onto the aerobic granules, which in turn indicated that ion-exchange was one of the Ni2+ biosorption mechanisms.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Xu H,Liu Y,Tay JH

doi

10.1016/j.biortech.2005.03.011

subject

Has Abstract

pub_date

2006-02-01 00:00:00

pages

359-63

issue

3

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(05)00177-X

journal_volume

97

pub_type

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