粉煤灰合成沸石除磷机理研究  

MECHANISM OF PHOSPHATE REMOVAL BY ZEOLITIZED FLY ASH

作　　者：赵统刚[1] 吴德意[1] 孔海南[1] 陈建刚[1] 张葆华[1] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《水处理技术》2006年第7期23-26,共4页Technology of Water Treatment

基　　金：国家"十五"高技术发展计划(863)项目(2002AA601013);上海市重大科技攻关项目(04DZ12030-2)

摘　　要：利用粉煤灰合成沸石,考察了其对模拟废水中磷酸盐的去除效果,并着重研究了其除磷机理。结果表明,粉煤灰合成沸石有优良的除磷效果,其磷酸吸收系数几乎是原料粉煤灰的4倍,比原料粉煤灰有更高的吸附磷的潜力。粉煤灰合成沸石对磷酸盐的去除机理包括化学沉淀作用和吸附作用,且吸附作用随着平衡溶液的pH值的增大而减弱。粉煤灰合成沸石中沸石成分的骨架结构没有磷吸附作用,粉煤灰只能通过化学沉淀作用去除磷酸盐,粉煤灰合成沸石对磷的吸附作用主要来源于粉煤灰合成沸石过程中产生的无定型非晶体的中间体物质。The mechanism of phosphate removal from simulative wastewater by synthesized zeolite from fly ash is put forward in this paper. The results indicated that synthesized zeolite could effectively eliminate phosphate. The phosphate adsorption coefficient of zeolitized fly ash was nearly four fold that of fly ash, so it had higher phosphate adsorption potential than fly ash. The mechanism of phosphate removal by zeolitized fly ash was not only precipitation but also adsorption; the adsorption action was weaken with the rise of pH values of solution. Zeolite itself had no phosphate adsorption effect, but could remove phosphate by precipitation of fly ash. The effect of phosphate adsorption stems from the intermediary matter of amorphous non-crystals produced during the synthesizing process.

关 键 词：合成沸石 粉煤灰 机理 氨氮 磷酸盐 

分 类 号：TQ424.2[化学工程]