File(s) under permanent embargo
Biosorption of zinc from aqueous solutions using biosolids
journal contributionposted on 2004-03-01, 00:00 authored by L Norton, Bas BaskaranBas Baskaran, T McKenzie
The potential to remove zinc from aqueous solutions through biosorption using biosolids was investigated. Batch experimental results showed that the biosorptive capacity of dry, unground biosolids was 0.564 mM/(g dry biosolids). Pretreatment of the biosolids, including drying and grinding, affected the sorptive potential of the biomass. Kinetic experiments showed that dilute zinc solutions reached equilibrium within 5 h, whereas equilibrium was not reached until 24 h for more concentrated solutions. The biosorptive capacities were dependent on zinc solution pH, with pH 4 being optimal. Infrared spectra analysis suggested that carboxyl functional groups are responsible for zinc uptake.