摘要： 采用基于Fe⁰的非均相UV/Fenton技术对水中盐酸副品红（BR9）的去除效果和主要影响因素进行了研究。结果表明：当pH=3.0，Fe⁰ 25 mg/L，H₂O₂ 34 mg/L时，1 min后BR9的去除率达93.4%，反应符合伪一级降解动力学；初始BR9浓度升高，反应速率降低，BR9绝对去除量增加。pH升高，BR9去除率降低，pH>3时，BR9去除率< 70%；水中少量天然有机物（TOC 5~10 mg/L）和常见无机阴离子（Cl^-、SO₄^2-和NO₃^-）均抑制了体系对BR9的降解；自由基抑制实验证实降解过程符合羟基自由基（·OH）氧化机理。

关键词: Fe⁰, UV/Fenton, 非均相, 盐酸副品红, 动力学

Abstract: Research on the removing effects of Fe⁰ based heterogeneous UV/Fenton process on hydrochloride para-fuchsine in water and the main influencing factors have been conducted. The results show that when pH=3.0, H₂O₂ 34 mg/L,Fe⁰ 25 mg/L,the removing rate of BR9 reaches 93.4% after 1 min reaction. The reaction complies with pseudo first order degradation kinetics. With the increase of initial BR9 concentration,the reaction speed de-creases and BR9 absolute removing capacity increases. With the increase of pH,the removing rate of BR9 de-crease. When its pH is>3,the average BR9 removing rate is<70%. A small amount of natural organic substances in water(TOC 5-10 mg/L)and common inorganic anions(Cl^-、SO₄^2- and NO₃^-)could inhibit the degradation effect of the system on BR9. The free radical inhibition test verifies that the degradation process complies with alkyl free radical(·OH)oxidation mechanism.

Key words: Fe⁰, UV/Fenton, heterogeneous, hydrochloride parafuchsine, kinetics

中图分类号: 

• X703.1