免烧自养反硝化复合滤料的制备及表征  

Preparation and characterization of burning-free autotrophic denitrification composite filter media

作　　者：覃佳佳 李金城[1,2] 时慧慧 邓钦 井含佳 钟溢健 QIN Jiajia;LI Jincheng;SHI Huihui;DENG Qin;JING Hanjia;ZHONG Yijian(Guilin University of Technology,Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin 541006,China;Yixing Industrial Research Institute,Guilin University of Technology,Wuxi 214201,China)

机构地区：[1]桂林理工大学广西环境污染控制理论与技术重点实验室,广西桂林541006 [2]桂林理工大学宜兴产业研究院,江苏无锡214201

出　　处：《应用化工》2024年第12期2902-2907,共6页Applied Chemical Industry

基　　金：桂林市科学研究与技术开发计划项目(20220114-3,20220124-7);新疆重大科技专项项目(2016A03008-1)。

摘　　要：采用硫磺、硫铁矿和菱铁矿等原料制备免烧自养反硝化复合滤料,得到了具有制备工艺简易、能耗低、表面粗糙和内部微孔丰富等优点的新型滤料。采用正交实验确定每种原料的最佳使用量,其中硫磺∶硫铁矿∶菱铁矿三种硫源配比选用7∶2∶1配比时复合滤料脱氮性能最佳,水硬性胶凝材料(CE)、凝固剂(CG)和发泡剂(FA)掺量分别为10%,15%,1.5%时复合滤料理化性能最佳。批次实验中对硝酸盐氮去除率分别为77.14%。SEM、XRD、FTIR三个表征图显示生成了新的物相,其使复合滤料结构稳定且强度大。A novel composite filter material for autotrophic denitrification was prepared using sulfur,pyrite,and siderite as raw materials.This material offers advantages such as a simple preparation process,low energy consumption,a rough surface,and abundant internal micropores.An orthogonal experiment was conducted to determine the optimal usage of each raw material.The denitrification performance of the composite filter material was optimal when the ratio of sulfur to pyrite to siderite was 7∶2∶1.The physical and chemical properties of the composite filter material were optimal when the water-hardened cementing material(CE),solidifier(CG),and foaming agent(FA)were added at 10%,15%,and 1.5%,respectively.Batch experiments demonstrated a nitrate nitrogen removal efficiency of 77.14%.Characterization using SEM,XRD,and FTIR revealed the formation of a new phase,which enhanced the structural stability and strength of the composite filter material.

关 键 词：自养反硝化 复合滤料 硫磺 硫铁矿 菱铁矿 

分 类 号：TQ177[化学工程—硅酸盐工业]