【摘要】 以城市污泥为原料,经氯化锌活化-管式炉热解、活性炭/铁氧化物共沉淀及粘接挤压成型制得一种新型磁性污泥活性炭,并通过正交实验和BET、SEM、IR及磁强测定等方法对活性炭制备工艺、各步产物的微观形貌与性能进行了系统研究.结果表明:在氯化锌活化剂浓度为3 mol/L、热解温度650℃、热解时间2 h、液固比2∶1的制备条件下,所得污泥活性炭碘值达334.6 mg/g,活性炭、磁化活性炭、成型磁化活性炭比表面积均≥300 m2/g,由于该材料使用后可经磁铁方便分离,预期具有很好的实际应用前景.更多还原

【Abstract】 A kind of shaped magnetic sludge activated carbon was prepared via ZnCl 2 activation-tubular furnace pyrolysis,activated carbon / iron oxide co-precipitation and module-shaped technics. The optimization of preparation process,as well as the micromorphology and properities of the activated carbon materials,was investigated by orthogonal experiments,BET,SEM,IR and magnetization measurements. The experimental results showed that the iodine number and specific surface area of sludge activated carbon were over 330 mg / g and 300 m2/ g at ZnCl 2 concentration 3 mol / L,reaction time 2 h,temp. 650 ℃,and liquid-solid ratio 2∶ 1. Because the magnetic sludge activated carbon could be easily removed from the medium by a simple magnetic procedure,it was expected to have a fine application prospect.更多还原