The Scientific World Journal / 2014 / Article / Tab 3 / Research Article
Rapid Preparation of Biosorbents with High Ion Exchange Capacity from Rice Straw and Bagasse for Removal of Heavy Metals Table 3 Reaction conditions for preparations of modified rice straw, phosphorus content, degree of substitution, and ion exchange capacity of the modified rice straw.
Sample names Heating methods Conditions % P Degree of substitution Ion exchange capacity (meq/g) Bagasse* — — — —
0.11* Bagasse oil 2 hr Oil bath 150°C 120 min 2.90 0.16 0.86 Bagasse 300 W Microwave 300 W 5 min 4.04 0.24 1.51 Bagasse 450 W Microwave 450 W 3 min 4.70 0.28 2.17 Bagasse 600 W Microwave 600 W 2 min 3.82 0.22 1.36 Bagasse 800 W Microwave 800 W 1.5 min 2.63 0.15 0.85 Bagasse DMF oil 2 hr Oil bath 150°C 120 min 0.95 0.05 0.25 Bagasse-DMF 300 W Microwave 300 W 5 min 3.37 0.19 1.26 Bagasse-DMF 450 W Microwave 450 W 3 min 4.83 0.29 1.83 Bagasse-DMF 600 W Microwave 600 W 2 min 4.64 0.28 1.60 Bagasse-DMF 800 W Microwave 800 W 1.5 min 4.58 0.27 1.59 Bagasse-NaOH oil 2 hr Oil bath 150°C 120 min 2.61 0.32 1.23 Bagasse-NaOH 300 W Microwave 300 W 5 min 5.81 0.36 2.38 Bagasse-NaOH 450 W Microwave 450 W 3 min 7.19 0.46 3.50 Bagasse-NaOH 600 W* Microwave 600 W 2 min 7.76
0.51*
3.62* Bagasse-NaOH 800 W Microwave 800 W 1.5 min 6.89 0.44 3.08
Samples for sorption test.