作　　者： ; ; ; ;

机构地区： 兰州理工大学石油化工学院

出　　处： 《环境科学与技术》 2018年第12期255-261,共7页

摘　　要： 文章以铝污泥和粉煤灰为主要原料,水玻璃为添加剂制备新型颗粒状铝污泥基质(GASM)。选取原料配比、添加剂比例和煅烧温度3种因素为影响因子对GASM制备的主要影响因素进行优化;制备后利用SEM和XRD对GASM进行表征并测试GASM对氮、磷污染物的去除性能。结果表明:影响因子对GASM填料性能的影响显著性顺序为煅烧温度、原料配比和添加剂比例,具体的最优制备条件为:煅烧温度约1 010℃,铝污泥与粉煤灰比例73∶27,添加剂比例11%;根据表征结果发现GASM具有发达的空隙结构,铝元素主要以结构稳定的非晶态形式存在;经过多次重复试验,得到基于GASM材料的装置对农村污水中NH3-N的最高去除率为79.56%,对污水中TN和TP的去除率总体变化趋势相似,最高去除率分别为67.76%和79.91%,结果表明GASM材料对氮、磷的去除效果较好。 A new granular aluminum sludge matrix was developed with aluminum sludge and fly ash as the main raw material and water glass as additive.The main influencing factors of the preparation of GASM were optimized by the proportion of raw materials, the proportion of additives and the sintering temperature.The GASM was characterized by SEM and XRD after preparation, and test the removal performance of GASM on nitrogen and phosphorus pollutants. The experiment results showed that the effect of particle matrix performance was sintering temperature > raw material ratio > additive ratio. The Optimum preparation parameter is water treatment sludge: fly ash was 73∶27, additive ratio was 11%,sintering temperature was 1 010 ℃. According to the characterization results, GASM has a developed gap structure and aluminum is mainly in the amorphous form of stable structure. After repeated experiments, the best removal rate of NH3-N in rural sewage by GASM was 79.56%, and the removal rate of TN and TP in sewage was similar in general, with the removal rate of 67.76% and 79.91% respectively, the results showed that nitrogen and phosphorus were better removed by GASM.

关 键 词： 铝污泥基质 脱氮除磷 粉煤灰基质 响应面优化

领　　域： []