Abstract：
:A high performance biosorbent, polyethylenimine (PEI)-modified biomass, was prepared by attaching PEI onto the surface of inactive Escherichia coli biomass. Wastewater containing platinum was collected from an industrial laboratory for inductively coupled plasma (ICP) and used for the recovery study. The maximum platinum uptake of PEI-modified biomass was enhanced up to 108.8 mg/g compared to 21.4 mg/g of the raw biomass. Kinetic experiments revealed that sorption equilibrium could reach within 60 min for the PEI-modified biomass. The results of FTIR and XPS analysis of Pt-unloaded and Pt-loaded PEI-modified biomass indicated that electrostatic interaction was the main binding mechanism between the platinum ions and the binding sites on the surface of the biomass. Metallic form of platinum in ash was recovered by incineration with a recovery efficiency of over 98.7%. Furthermore, XPS, TEM and XRD results confirmed that the platinum recovered were both forms of Pt(0) and Pt(2+).
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Won SW,Mao J,Kwak IS,Sathishkumar M,Yun YSdoi
10.1016/j.biortech.2009.09.056subject
Has Abstractpub_date
2010-02-01 00:00:00pages
1135-40issue
4eissn
0960-8524issn
1873-2976pii
S0960-8524(09)01262-0journal_volume
101pub_type
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