Adsorptive capacity of ethylenediamine treated oxidised rice straw for sulfur dioxide

作者：Yang Chen; Tan Ting; Zhu Xiaofan^*

来源：Carbohydrate Polymers, 2012, 87(2): 1843-1848.

DOI：10.1016/j.carbpol.2011.10.013

• Rice straw
• Potassium permanganate
• Ethylenediamine
• Sulfur dioxide
• Adsorption
• Characterization

The introduction of sulfur dioxide (SO(2)) into the atmosphere is of major concern causing acid rain. Thus, the modified rice straw was prepared via sequential reactions of the active groups on rice straw with potassium permanganate (KMnO(4)) followed by the alkaline molecule, ethylenediamine, to adsorb SO2. The experimental parameters were optimized as the concentration of potassium permanganate of 5%, the concentration of ethylenediamine of 10%, the moisture content of 200%, as well as the reaction temperature of room temperature. Experiments show that the modified rice (Straw-KMnO(4)-NH(2)) has better adsorption capacity for SO(2) and its saturated sulfur capacity could reach similar to 340 mg/g, which was much better than that of the raw straw and other reported modified samples. The performance of the Straw-KMnO(4)-NH(2) was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron micrographs (SEM), and elemental analysis.

• 出版日期2012-1-15
• 单位四川大学