Effective green treatment of sewage sludge from Fenton reactions: Utilizing MoS2 for sustainable resource recovery

• 成果类型: Article
• 署名作者: Liang, Zhiyan; Yan, Qingyun; Ou, Huase; Li, Dawei; Zhang, Yayun; Zhang, Jinlong; Zeng, Lixi; Xing, Mingyang
• 署名单位: East China University of Science & Technology; East China University of Science & Technology; Jinan University; Nanjing University of Information Science & Technology; East China University of Science & Technology
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-13069
• DOI: 10.1073/pnas.2317394121
• 发表日期: 2024-02-27
• 关键词: waste-water; ferric sludge; degradation; activation; catalyst; reuse; h2o2; dye; ion

摘要

Effectively managing sewage sludge from Fenton reactions in an eco-friendly way is vital for Fenton technology's viability in pollution treatment. This study focuses on sewage sludge across various treatment stages, including generation, concentration, dehydration, and landfill, and employs chemical composite MoS2 to facilitate green resource utilization of all types of sludge. MoS2, with exposed Mo4+ and low-coordination sulfur, enhances iron cycling and creates an acidic microenvironment on the sludge surface. The MoS2-modified iron sludge exhibits outstanding (>95%) phenol and pollutant degradation in hydrogen peroxide and peroxymonosulfate-based Fenton systems, unlike unmodified sludge. This modified sludge maintains excellent Fenton activity in various water conditions and with multiple anions, allowing extended phenol degradation for over 14 d. Notably, the generated chemical oxygen demand (COD) in sludge modification process can be efficiently eliminated through the Fenton reaction, ensuring effluent COD compliance and enabling eco-friendly sewage sludge resource utilization.