香蕉皮的干燥及对罗丹明B的吸附

Drying of Banana Peel and Its Adsorption to Rhodamine-B

以香蕉皮为原料,考察3种干燥法(自然干燥、烘箱干燥和微波干燥)对制备香蕉皮粉的影响,并测定其对罗丹明B的吸附性能.结果表明,采用微波干燥法,在功率800 W的条件下仅需4 min即成功制备出高脱水率(90%)、易研磨且外观和结构保持较好的香蕉皮粉;香蕉皮粉对罗丹明B具有良好的吸附性能,其吸附量(>110 mg/g)高于多数其他生物吸附剂的吸附量;香蕉皮粉结构中羧基和羟基等官能团促进了罗丹明B的吸附.

Using banana peel as raw material, the effects of three different drying methods on preparation of banana peel powder were investigated, and its adsorption performance to Rhodamine-B was examined. It was found that drying in microwave oven with the power of 800 W was the optimum method, and the dried banana peel powder possessing fast rate of water loss （90%）, easy grinding and good maintaining of its original appearance and structure was obtained after 4 min, the adsorbed amount of Rhodamine-B on banana peel powder （〉110 mg/g） was larger than that of other biosorbents, the carboxyl and hydroxyl groups in the structure of banana peel powder contributed to the adsorption of Rhodamine-B.