期刊
ADVANCES IN ENVIRONMENTAL RESEARCH
卷 8, 期 3-4, 页码 629-635出版社
ELSEVIER SCI LTD
DOI: 10.1016/S1093-0191(03)00035-2
关键词
biosorption; heavy metal removal; wastewater; zinc; biosolids
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. (C) 2003 Elsevier Science Ltd. All rights reserved.
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