2025年"核理安邦“联合博士生学术论坛

Polymeric Ferric Sulfate Enhanced Ionizing Radiation for Coking Wastewater Treatment

Not scheduled

12m

Location: 清华大学核能与新能源技术研究院

口头报告 环、化、材、技、能源战略 环、化、材、技、能源战略

Speaker

丰 程 (清华大学)

摘要

将传统水处理与电离辐射（IR）相结合，能够降低污染物去除所需的辐射剂量，使基于IR的高级氧化工艺（AOPs）更加高效且成本效益更高。本研究表明，将聚铁硫酸盐（PFS）与IR结合，能够协同提升水处理效率，同时降低能耗。IR/PFS系统在处理焦化废水时，实现了浊度（94.3%）、UV254（69.4%）和COD（43.6%）的同时去除，优于单独使用IR或PFS。该系统还在pH值3-10和复杂水基质中实现了对双酚A（BPA）大于99%的降解。

通过特性分析和Ferron定时络合光谱分析，揭示了PFS的结构稳定性和铁物种的转化趋势。PFS具有双重功能：（i）通过水解生成聚铁物种，用于混凝；（ii）作为Fenton系统的稳定Fe(III)源，在水合电子介导的Fe(III)/Fe(II)循环和辐射分解H₂O₂的作用下，产生的•OH产量比单独辐射提高了1.5倍。这些发现确立了IR/PFS作为一种能效高的范式，将物理化学过程相结合，为可持续的水修复提供了新途径。

Abstract

Integrating traditional water treatment with ionizing radiation (IR) can decrease the radiation dose needed for pollutant removal, making IR-based advanced oxidation processes (AOPs) more efficient and cost-effective. This study demonstrated that integrating polymeric ferric sulfate (PFS) with IR synergistically enhanced water treatment efficiency while reducing energy demand. The IR/PFS system achieved concurrent removal of turbidity (94.3%), UV254 (69.4%), and COD (43.6%) in treating coking wastewater, outperforming standalone IR or PFS. It also showed >99% bisphenol A (BPA) degradation across pH 3–10 and in complex water matrices. Characterization and Ferron-timed complex spectrophotometry analyses revealed the PFS’s structural stability and iron species transformation trends. PFS enables dual functionality: (i) hydrolysis generates polymeric iron species for coagulation, and (ii) it serves as a stable source of Fe(III) for the Fenton system, which is driven by a hydrated electron-mediated reduction in the Fe(III)/Fe(II) cycle and radiolytic H2O2 production, amplifying •OH yield by 1.5 times compared to radiation alone. These findings establish IR/PFS as an energy-efficient paradigm bridging physicochemical processes for sustainable water remediation.