关键词: 凹凸棒土;稻壳;复合材料;吸附;有机物

Abstract: Palygorskite /carbon composite materials were prepared from palygorskite and rice husk by different treatments.The structures of samples were characterized by Brunner -Emmet-Teller (BET), X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) analysis.The influences of the adsorption time and adsorbent dosage on the phenol adsorption properties were investigated.Palygorskite /carbon composites prepared by acid modification have good performance on phenol adsorption .Under the condition of the acid concentration is 0.8 mol· L-1 and the acid modification time is 4 h, the adsorbent prepared performs well and the adsorption capacity is 8.02 mg· g-1 .The method of high temperature was used in regeneration of the palygorskite /carbon composite materials after phenol adsorption , and the result shows that the percentages of regeneration reach 85.3％.The biomass carbon prepared by rice husk has realized its resource utilization .

Key words: palygorskite;rice husk;composite;adsorption;organic compound