Song Ya-Li, Li Ji-Tai
College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Wusi East Road No. 180, Baoding 071002, PR China.
Ultrason Sonochem. 2009 Apr;16(4):440-4. doi: 10.1016/j.ultsonch.2008.12.011. Epub 2009 Jan 4.
Degradation of C.I. Direct Black 168 from aqueous solution using Fenton-like reactions combining ultrasound was investigated. In the presence of H(2)O(2), the effect of the heterogeneous catalysts, such as fly ash, kaolinite or diatomaceous earth on the degradation of Direct Black 168 was observed under ultrasound. The fly ash was the most efficient catalyst. It is apparent that ultrasound can prompt the reaction to take place and give in higher degradation. In the combination of ultrasound and fly ash/H(2)O(2), the effect of different system variables namely concentration of the dye, dosage of fly ash, concentration of H(2)O(2), pH of solution and the addition of NaCl were studied. 99.0% removal ratio was achieved at initial concentration 100mg/L, pH 3.0, and dosage of fly ash 2.0 g/L, as well as 2.94 mM H(2)O(2). NaCl exhibited only a minor effect on the dye removal.
研究了采用类芬顿反应结合超声从水溶液中降解直接耐晒黑168的情况。在过氧化氢存在下，观察了粉煤灰、高岭土或硅藻土等非均相催化剂在超声作用下对直接耐晒黑168降解的影响。粉煤灰是最有效的催化剂。显然，超声能促使反应发生并实现更高程度的降解。在超声与粉煤灰/过氧化氢的组合体系中，研究了不同系统变量，即染料浓度、粉煤灰用量、过氧化氢浓度、溶液pH值以及氯化钠添加量的影响。在初始浓度100mg/L、pH值3.0、粉煤灰用量2.0g/L以及2.94mM过氧化氢的条件下，去除率达到了99.0%。氯化钠对染料去除的影响较小。
