无机材料学报 ›› 2024, Vol. 39 ›› Issue (10): 1135-1142.DOI: 10.15541/jim20230580 CSTR: 32189.14.10.15541/jim20230580

• 研究论文 • 上一篇    下一篇

基于活性污泥焚灰的类Fenton催化剂的制备及其对亚甲基蓝的降解性能

蔡梦宇(), 李杨虹淼, 杨彩云, 周雨婷, 吴昊()   

  1. 燕山大学 环境与化学工程学院, 河北省水体重金属深度修复与资源利用重点实验室, 秦皇岛 066004
  • 收稿日期:2023-12-18 修回日期:2024-05-06 出版日期:2024-10-20 网络出版日期:2024-05-16
  • 通讯作者: 吴 昊, 讲师. E-mail: hwu@ysu.edu.cn
  • 作者简介:蔡梦宇(1998-), 男, 硕士研究生. E-mail: c18503338109@163.com
  • 基金资助:
    河北省自然科学基金(B2024203014);河北省引进留学人员资助项目(C20230326);河北省中央引导地方科技发展资金(236Z3604G);秦皇岛市科学技术研究与发展计划(202101A268);燕山大学基础研究与创新培育项目(2021LGQN018)

Activated Sludge Incineration Ash Derived Fenton-like Catalyst: Preparation and Degradation Performance on Methylene Blue

CAI Mengyu(), LI-YANG Hongmiao, YANG Caiyun, ZHOU Yuting, WU Hao()   

  1. Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
  • Received:2023-12-18 Revised:2024-05-06 Published:2024-10-20 Online:2024-05-16
  • Contact: WU Hao, lecturer. E-mail: hwu@ysu.edu.cn
  • About author:CAI Mengyu (1998-), male, Master candidate. E-mail: c18503338109@163.com
  • Supported by:
    Hebei Natural Science Foundation(B2024203014);Hebei Province Foundation of Returned Talent(C20230326);Central Guidance on Local Science and Technology Development Fund of Hebei Province(236Z3604G);Science and Technology Research and Development Plan of Qinhuangdao(202101A268);Cultivation Project for Basic Research and Innovation of Yanshan University(2021LGQN018)

摘要:

载铁沸石因其来源广泛、制备简便及环境毒性低等特点, 被广泛用于催化类Fenton反应产生·OH, 以高效处理有机污染物。然而, 传统载铁沸石的制备成本高且Fe2+再生困难, 限制了其在催化类Fenton反应中的工业化应用。基于此, 本研究以污水处理厂活性污泥焚烧处理后的灰分为原料, 选择性回收其中的硅、铝和铁等元素。制备的Fe2+-方钠石(FSD)可用于类Fenton反应活化过氧乙酸(PAA), 以高效降解水溶液中的亚甲基蓝(MB)。 结果表明:FSD可在较宽的pH范围内催化PAA生成·OH、1O2和R-O·等多种活性氧物种, 进而通过羟基化或亚砜化途径催化降解MB。以0.5 mol/L Fe2+制备的FSD用量为0.3 g/L, PAA浓度为0.3 mmol/L时, FSD/PAA体系可在20 min内完全降解40 mg/L MB。此外, FSD中的还原性硫组分可促进Fe2+再生, 维持其催化活性。且FSD/PAA体系可在不同水质和生活污水中高效降解多种污染物, 具有性能优良和适用性广的优点。

关键词: 活性污泥, 方钠石, 类Fenton降解, 过氧乙酸, 亚甲基蓝

Abstract:

Fe@zeolite materials are widely applied in the production of ·OH by catalyzing Fenton-like reactions for degradation of recalcitrant organic pollutants due to their comprehensive sources, simple preparation and low environmental impact. However, the high cost of Fe@zeolite synthesis and the lack of Fe2+ regeneration strategy are serious issues that limit the application of Fe@zeolite as a Fenton-like catalyst in industrial-scale systems. In this study, the ash generated from activated sludge incineration treatment was utilized as raw material to selective recover Si, Al and Fe, preparing Fe2+-sodalite (FSD) material. Consequently, it was used as a Fenton-like catalyst to activate peroxyacetic acid (PAA) for the degradation of methylene blue (MB) in wastewater. Results indicated thatFSD was capable of effectively catalyzing PAA to generate various active oxygen species such as ·OH, 1O2 and R-O· in a wide pH range, thereby degrading MB through hydroxylation and sulfonation pathways. MB can be completely removed during 20 min under optimized conditions of 0.3 mmol/L PAA and 0.3 g/L FSD prepared with 0.5 mol/L Fe2+. In addition, the reductive S species in FSD can maintain its catalytical activity by enhancing Fe2+ regeneration, and the FSD/PAA system has been proven to be effective in the degradation of various organic pollutants under practical and complex environmental conditions.

Key words: activated sludge, sodalite, Fenton-like degradation, peroxyacetic acid, methylene blue

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