中文摘要：

以石墨为阳极，活性炭纤维为阴极，通过连续向阴极极板通入空气电解氧气产生过氧化氢，再与外加的亚铁离子（Fe2＋）形成循环电-Fenton试剂，并将电-Fenton反应过程中产生的羟基自由基用于解聚纤维素。结果表明：活性炭纤维是较理想的阴极材料，电-Fenton解聚纤维素的较优反应条件为，电流强度20mA，电压1000mV，曝气速率为2．5L／min，硫酸钠溶液pH值为3，反应30min后，过氧化氢的积累量可以达到0．25mmol，25℃反应24h后，纤维素结晶度降低33．6％，纤维素解聚率达到53％。

英文摘要：

The cellulose dep0lymerization was carried out by the circulating electro-Fenton reaction which was composed of graphite anode, active carbon fiber（ACF） cathode and Na2SO4 and FeSO4 mixed solution associated with air blow. It was found that the amount of hydroxyl free radical （ · OH） produced by circulating electro-Fenton reaction had significantly affected the depolymerization. The experirnenta[ results showed that when the circulating electro-Fenton reaction conditions were kept at the current intensity of 20 mA , the voltage of 1000 mV, the air sparging ra＇te of 2. 5 L/rain and the pH value of Na·SO4 solution about 3 and reacted for 30 rain, the accumulation of hydrogen peroxide could reach 0.25 retool. After continuously reacted for 24 h at 25℃, the depolymerization ratio and the crystallinity decrease of the cellulose were 53 % and 33.6 %, respectively.