压力酸浸制备双价聚硅硫酸铝铁及其除藻性能  

Preparation of Dual-valent Polysilicate Aluminum Ferric Sulfate by Pressure Acid Leaching and Its Removal of Cyanobacteria

作　　者：梁毓嘉 恩达 吕莹 韩博蕾 谢慧芳[1] 曲虹霞[2] 陈守文[1] LIANG Yu-jia;ASGODOM Engda Michael;LYU Ying;HAN Bo-lei;XIE Hui-fang;QU Hong-xia;CHEN Shou-wen(Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse,School of Environmental and Biological Engineering,Nanjing 210094,China;School of Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学环境与生物工程学院江苏省化工污染控制与资源化重点实验室,南京210094 [2]南京理工大学化工学院,南京210094

出　　处：《装备环境工程》2020年第7期38-44,共7页Equipment Environmental Engineering

摘　　要：目的利用钾长石提钾后的固体渣,开发双价多功能絮凝剂,研究其除藻性能,实现钾长石的综合利用,为除藻等水处理提供新型药剂。方法利用压力酸浸(PAL)工艺提取固体渣中的铝、铁,通过引入Fe(II)源,制备得到含Fe(II)的双价聚硅硫酸铝铁(PSAFS),以铜绿微囊藻(Microcystis aeruginosa)为模式藻,研究PSAFS的混凝除藻效果及其与H2O2的耦合效应。结果当硫酸浓度为2.8 mol/kg,固液比为1:3时,在105℃下反应2 h,PAL可提取近100%的铝和85.6%的铁。含Fe(II)的双价聚硅硫酸铝铁新型絮凝剂对于Microcystis aeruginosa具有优异的去除效果,引入Fe(II)可以拓宽絮凝剂应用的p H范围。同时,在H2O2存在时,产品明显增加了藻细胞的失活。结论以钾长石提钾后的固体渣为原料,采用PAL工艺,可绿色经济地制备含Fe(II)的双价PSAFS,是一种具有应用前景的多功能絮凝剂。The paper aims to develop a multifunctional dual-valent flocculant from the solid residues of K-feldspar, study its characteristics in removal of microcystis aeruginosa, to achieve comprehensive utilization of K-feldspar and provide a new flocculant for water treatment. The pressure acid leaching(PAL) process was used to extract aluminum and iron from solid residues and the dual-valent PSAFS was prepared by introducing Fe(II). Microcystis aeruginosa, the model of cyanobacteria, was used to determine the algal removal characteristics and coupling effects with H2 O2. Nearly 100% aluminum and 85.6% iron were extracted at H2 SO4 concentration 2.8 mol/kg, solid-liquid ratio 1:3, temperature 105 ℃ and PAL time 2 h. The dual-valent PSAFS showed excellent ability to remove microcystis aeruginosa and the introduction of Fe(II) can broaden the pH range of flocculant application. This new coagulant could deactivate more microcystis cell when H2 O2 was present. The dual-valent PSAFS can be prepared from solid residues of K-feldspar after potassium extractions by PAL process in a green and economical way. It is a promising multifunctional flocculant.

关 键 词：钾长石固体渣 铜绿微囊藻 压力酸浸 耦合絮凝 

分 类 号：TU991.2[建筑科学—市政工程]