水厂铁泥制备磁性钙霞石吸附剂去除水中氨氮的研究  

Recycling of groundwater treatment sludge for preparing magnetic cancrinite adsorbent for ammonia removal

作　　者：郭彤 朱君娜 郭树君 邵德武 陈瑜[3] GUO Tong;ZHU Jun-na;GUO Shu-jun;SHAO De-wu;CHEN Yu(School of Environment,Northeast Normal University,Changchun 130117,China;Wastewater Treatment Plant of Jilin Petrochemical Company,Jilin 132011,China;Jilin Institute of Forestry Survey and Design,Changchun 130022,China)

机构地区：[1]东北师范大学环境学院,吉林长春130117 [2]吉林石化公司污水处理厂,吉林吉林132011 [3]吉林省林业勘察设计研究院,吉林长春130022

出　　处：《东北师大学报（自然科学版）》2020年第4期138-142,共5页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(52070038);吉林省社会发展计划项目(20190303001SF).

摘　　要：为了资源化利用地下水厂铁泥,研究了以抗坏血酸为还原剂水热转化铁泥为磁性吸附剂的方法.结果表明,采用碱性水热的方法,控温240℃反应5h后,其饱和磁化强度达到4.4emu/g,对水中氨氮的最大饱和吸附量达到17.4mg/g.在处理过程中添加抗坏血酸,可以增强吸附剂的饱和磁化强度(8.6emu/g),并显著提升氨氮的吸附量(26.4mg/g).水热过程中,铁泥中主要成分硅铝化合物溶解再结晶生成钙霞石,而另一主要成分水铁矿则相变生成磁赤铁矿,由此使制备的吸附剂具有良好的磁响应.In order to recycle and treat the iron mud of underground water plant,the iron mud of underground water plant was prepared into a magnetic adsorbent containing calcium nepheline by alkaline hydrothermal method with reaction for 5 hours at 240°C.The obtained adsorbent showed desirable magnetization of 4.4 emu/g and maximum adsorption capacity of 17.4 mg/g for ammonia.By adding ascorbic acid in the hydrothermal process,the product exhibited strong magnetization(8.6 emu/g)and high maximum adsorption capacity of ammonia(26.4 mg/g).During the hydrothermal process,calcium nepheline is formed by the dissolution and recrystallization of aluminosilicate the main components of iron mud,and magneto hematite is formed by the phase transformation of hydropyrite,another main components of iron mud,so that the adsorbent has a good magnetic response.This method has potential application prospects in environmental governance.

关 键 词：地下水厂铁泥 磁性吸附剂 氨氮 钙霞石 磁赤铁矿 

分 类 号：X703[环境科学与工程—环境工程]