无机盐工业 ›› 2022, Vol. 54 ›› Issue (6): 31-37.doi: 10.19964/j.issn.1006-4990.2021-0406
于子扬1,3(),于贺伟2,赵改菊1,3(
),王鲁元1,3,孙荣峰1,3
收稿日期:
2021-07-07
出版日期:
2022-06-10
发布日期:
2022-06-22
作者简介:
于子扬(1998— ),男,硕士研究生,研究方向为芬顿铁泥资源化;E-mail:基金资助:
YU Ziyang1,3(),YU Hewei2,ZHAO Gaiju1,3(
),WANG Luyuan1,3,SUN Rongfeng1,3
Received:
2021-07-07
Published:
2022-06-10
Online:
2022-06-22
摘要:
芬顿铁泥是芬顿氧化技术处理工业有机废水产生的一种工业危险废弃物。芬顿铁泥中含有大量的铁资源,具有很高的资源回收潜力,现已成为国内外的研究热点。从化学法、热能法两个方面综述了目前国内外对芬顿铁泥的各类资源化利用方法,并对各类典型方法的研究进展、优缺点以及核心技术进行了介绍。展望了芬顿铁泥资源化利用未来的发展目标,并基于中国火电厂运行实际情况提出芬顿铁泥资源化利用新途径,即将芬顿铁泥作为原材料制备火电厂铁基选择性催化还原(SCR)脱硝催化剂,以期充分回收利用芬顿铁泥中的铁资源,减小铁泥堆积所造成的环境危害。
中图分类号:
于子扬,于贺伟,赵改菊,王鲁元,孙荣峰. 芬顿铁泥资源化利用研究进展[J]. 无机盐工业, 2022, 54(6): 31-37.
YU Ziyang,YU Hewei,ZHAO Gaiju,WANG Luyuan,SUN Rongfeng. Research progress on resource utilization of Fenton sludge[J]. Inorganic Chemicals Industry, 2022, 54(6): 31-37.
表1
还原法制取亚铁盐的应用研究
还原剂(方法) | 优点 | 缺点 | 产物/目的 |
---|---|---|---|
铁屑还原[ | 简化了结晶工艺,采用水-乙醇相使七水合硫酸亚铁快速结晶析出,缩短了生产时间,制得的产品可用于生产铁系染料 | 反应过程中需加入大量乙醇,工艺成本较高;对温度、pH、试剂浓度要求严格,不易操作且步骤繁琐 | 七水合硫酸亚铁 |
电化学还原[ | 提高了COD去除率,Fe3+转化率可以达到98%以上,加入填料组成三维电极,使填料表面感应带电发生电化学还原发应 | 电能损耗大,运行费用较高,反应过程中需严格控制Fe3+浓度和多次测量COD浓度,操作难度较大 | 纯度较高的亚铁盐 |
微生物还原[ | 将厌氧消化过程与芬顿铁泥的处置相结合,装置内所需温度较低,降低了系统能耗 | 需对厌氧微生物进行驯化培养,菌数不易控制,设备复杂,研发成本高 | 实现芬顿铁泥大幅减量化、无害化处理 |
H2S烟气[ | 省去了在常规烟气脱硫技术中对其中铁催化剂的单独氧化再生,降低了整体运行成本 | 需要使用大量化学试剂,易造成二次污染;实验步骤复杂,且反应所需条件过多 | 实现废水和废气的综合治理 |
碱性磷酸盐混合 物[ | 既避免了大量芬顿铁泥危险废弃物的产生,又能直接在线制得以FePO4为主的磷铁化合物,具有较高的经济效益和环境效益 | 制备的FePO4产品杂质较多,若要作为锂电池磷酸铁锂的原材料,还需对产物进一步提纯 | FePO4粗产品 |
紫外光[ | 减少了原料和废弃物的处理成本,且无外排固体废弃物,不产生二次污染;工艺方法简单,便于大规模推广 | 循环利用芬顿铁泥会导致铁泥内的有机质不断积累,反应槽内的负载型半导体催化剂消耗较大 | 建立芬顿铁泥自循环体系 |
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