粉煤灰制备PASFC及其在处理中段废水中的应用  

Preparation of PASFC from fly ash and its application in the treatment of washing and bleaching effluent

作　　者：顾玲[1] 马宇锋[1] 

机构地区：[1]陕西科技大学化学与化工学院,西安710021

出　　处：《中华纸业》2009年第6期63-66,共4页China Pulp & Paper Industry

摘　　要：以粉煤灰为主要原料,通过焙烧、酸浸、碱溶、聚合等步骤制备了一种无机高分子絮凝剂—聚合硅酸铝铁(PSAFC)。分别研究了m(NaF)∶m(粉煤灰)、溶出温度、盐酸浓度及溶出时间对粉煤灰中Al3+、Fe3+溶出率的影响。将制得的PSAFC用于造纸中段废水的处理,并与PAC、PFC的处理效果进行了比较。结果表明:当溶出温度为105℃,盐酸浓度为20%,溶出时间为2h,m(NaF)∶m(粉煤灰)为0.20∶1时,粉煤灰中Al3+的溶出率达39.4%,Fe3+的溶出率达52.1%;PSAFC对造纸中段废水中色度的去除率达95.2%,CODCr去除率达81.3%,其综合效果明显优于PAC和PFC。An inorganic macromolecule flocculant （PSAFC） was synthesized through calcinations, acid leaching, alkali dissolution and polymerization with fly ash as the major raw material. The effect of such factors as amount of m（NaF） ：m（fly ash）, digestion temperature, hydrochloric acid concentration and digestion time on Al^3＋ and Fe^3＋ dissolution from fly ash was investigated respectively. The PASFC thus prepared was used in the treatment of bleaching and washing effluent and its effect was compared with PAC and PFC. The result shows that the dissolution rate of Al^3＋ and Fe^3＋ are 39.4% and 52.1% respectively under the conditions of temperature 105℃, hydrochloric acid concentration 20%, dissolving time 2h, m（NaF） ：m（fly ash） 0.20 ： 1; the removal rate of PASFC for chroma is 95.2%, CODCr is 81.3% and it＇s comprehensive effect is better than that of PFC and PAC.

关 键 词：无机高分子絮凝剂 聚合硅酸铝铁 絮凝性能 造纸中段废水 

分 类 号：X793[环境科学与工程—环境工程] TS714[轻工技术与工程—制浆造纸工程]