【摘要】 研究了Fe²⁺/Ce³⁺/H₂O₂类Fenton反应体系去除邻苯二酚的性能.结果表明,在c（邻苯二酚）=10 mmol/L,pH=7及n(Fe²⁺)∶n(Ce³⁺)∶n（H₂O₂）=1∶2∶30的条件下,邻苯二酚的去除率可以达到85%以上,明显高于经典Fenton的去除率,且铈的加入改善了经典Fenton反应最适pH值在酸性范围内的缺点.通过对反应后生成沉淀物的FTIR和XPS表征,推测将Ce³⁺引入经典Fenton体系后,其提高了HO₂·/O₂^-·的生成速率,进而促进了类Fenton反应中Fe³⁺向Fe²⁺的转化,进一步催化了羟基自由基的产生,从而有效提高了邻苯二酚的降解转化.此外,部分铁和铈在反应过程中形成的沉淀化合物也有助于邻苯二酚及其降解中间产物的吸附去除.更多还原

【Abstract】 The removal performance of catechol by Fe²⁺/Ce³⁺/H₂O₂ Fenton-like reaction system was studied.The results showed that the optimum reaction conditions for the treatment of 10 mmol/L catechol were as follows:pH=7,n(Fe²⁺)∶n(Ce³⁺)∶n（H₂O₂） was 1∶2∶30,the removal rate of catechol could reach more than 85 %,which was obviously higher than that of classical fenton.The addition of cerium overcome the disadvantage of narrow application range of pH value in a classical Fenton reaction.The composition of the precipitates was characterized by FTIR and XPS.The influence of the addition of cerium on the classical Fenton reaction and the possible removal mechanism were investigated.In addition,the precipitated compounds formed from the reaction of some iron and cerium ions also contribute to the adsorption and removal of catechol and its degradation intermediates.更多还原