School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China.
Environ Geochem Health. 2018 Oct;40(5):1867-1876. doi: 10.1007/s10653-017-9946-1. Epub 2017 Mar 22.
To develop an effective method to remove the toxic and carcinogenic polycyclic aromatic hydrocarbons (CPAHs) from textile dyeing sludge, five CPAHs were selected to investigate the degradation efficiencies using ultrasound combined with Fenton process (US/Fenton). The results showed that the synergistic effect of the US/Fenton process on the degradation of CPAHs in textile dyeing sludge was significant with the synergy degree of 30.4. During the US/Fenton process, low ultrasonic density showed significant advantage in degrading the CPAHs in textile dyeing sludge. Key reaction parameters on CPAHs degradation were optimized by the central composite design as followed: HO concentration of 152 mmol/L, ultrasonic density of 408 W/L, pH value of 3.7, the molar ratio of HO to Fe of 1.3 and reaction time of 43 min. Under the optimal conditions of the US/Fenton process, the degradation efficiencies of five CPAHs were obtained as 81.23% (benzo[a]pyrene) to 84.98% (benz[a]anthracene), and the benzo[a]pyrene equivalent (BaP) concentrations of five CPAHs declined by 81.22-85.19%, which indicated the high potency of US/Fenton process for removing toxic CPAHs from textile dyeing sludge.
为了开发一种有效去除纺织染料污泥中有毒致癌多环芳烃（CPAHs）的方法，选择了 5 种 CPAHs 来研究超声联合 Fenton 工艺（US/Fenton）对其的降解效率。结果表明，US/Fenton 工艺对纺织染料污泥中 CPAHs 的降解具有显著的协同效应，协同度为 30.4。在 US/Fenton 工艺中，低超声密度在降解纺织染料污泥中的 CPAHs 方面表现出显著优势。通过中心复合设计对 CPAHs 降解的关键反应参数进行了优化，得到的最佳条件为：HO 浓度 152 mmol/L、超声密度 408 W/L、pH 值 3.7、HO 与 Fe 的摩尔比 1.3、反应时间 43 min。在 US/Fenton 工艺的最佳条件下，5 种 CPAHs 的降解效率达到 81.23%（苯并[a]芘）至 84.98%（苯并[a]蒽），5 种 CPAHs 的苯并[a]芘当量（BaP）浓度降低了 81.22%-85.19%，这表明 US/Fenton 工艺在去除纺织染料污泥中的有毒 CPAHs 方面具有很高的功效。
