摘要
基于城市污水污泥中含有机物的特点,研究了以其为原料制备吸附剂的工艺条件,探讨了活化温度、活化时间等因素对制备吸附剂性能及产率的影响规律,结合扫描电镜表征分析,考察了吸附剂作为水处理吸附剂的去除效果。结果表明,以氯化锌为活化剂制备吸附剂的最佳工艺条件为:活化温度550℃、活化剂浓度3mol/L、固液比1∶2、活化时间1h,吸附碘值在410mg/g以上,比表面积为227.3m2/g,得率为38.32%。将该产品用于处理重金属废水,投加量为0.5g,吸附平衡时间为60min时,对Cu2+的吸附量达到18mg/g,其效果优于商用粉末活性炭。
Based on the characteristic of organic substance contained in the urban sewage sludge, the technological conditions of preparation for carbonaceous adsorbent from sewage sludge are studied. The factors influencing the performance and the production of the absorbent, such as activation temperature, activation time and so on, are discussed. The removal effect of sludge activated carbon is preliminarily discussed with scanning electron microscope analysis . The result indicates that optimal conditions for preparing sewage sludge-based activated carbon is the concentration of ZnCl2 3M , activation temperature of 550℃, 1 h of activating time and 2：1 of the impregnation ratio of ZnCl2/sawdust. Under the conditions, the iodine value of the sludge activated carbon is over 410mg/g, the BTE surface area is 227. 3m^2/g and the yield rate of product is 38. 32%. This sludge activated carbon is used to treat wastewater with heavy metal when the adsorption equilibrium time is 60min , the adsorptive capacity of Cu^2＋ is 18mg/g. The effect of adsorption is better than power aetived carbon.
出处
《西华大学学报（自然科学版）》
CAS
2010年第2期174-177,共4页
Journal of Xihua University:Natural Science Edition
基金
四川省科技厅应用基础项目(2006J13-001-2)
四川省教育厅重点项目(2005A116)
关键词
污水污泥
吸附剂
活化剂
重金属废水
sewage sludge
adsorbent
activation
wastewater with heavy metal
