Received date: 2000-03-12
Online published: 2010-10-01
A new product called “chitosan bios orbent” is used to remove chromium (Ⅲ) from solution. The effects of pH, bios orbent particle size and initial chromium(Ⅲ) concentration are studied. It sho ws that pH 4.5～5.5 is the optimal range of absorption. Biosorbent particle size with 200～300 μm has better results. The adsorption isotherms could be describ ed by Langmuir model. The maximum adsorption capacity could reach 75.12 mg/g bio sorbent. A packed column (D16 mm×100 mm) is used to test its possible a ppli cation in tannery wastewater treatment. Under the optimal condition, the column could work well. The chromium(Ⅲ) concentration in the discharge water could be reduced from 2 000 mg/L to 1.5 mg/L, the maximum adsorption capacity could reach 23.76 mg/g chitosan biosorbent and the column could be used for more than 5 tim es.
Key words： chitosan; tannery wastewater; wastewater treatment; biosorption
CHEN Peng, TAN Tianwei . Biosorption of chromium(Ⅲ) from solution by chitosan biosorbent[J]. Industrial Water Treatment, 2000 , 20(6) : 16 -19 . DOI: 10.11894/1005-829x.2000.20(6).16
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