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研究论文

摘要：用H₂O₂作氧化剂, 在连续式的压力反应器内探索了WPO(过氧化氢湿式氧化法)、CWPO(催化过氧化氢湿式氧化法)氧化降解含酸性红B染料模拟废水的过程, 分别考察温度、压力、氧化剂量及催化剂对反应过程与对象污染物降解的影响规律.结果表明, 与常规湿式氧化法相比, WPO能在较低的温度和压力下降解结构稳定的有机物, 在220℃、8min、0.1MPa时, 含1500mg·L^-1酸性红B染料模拟废水的COD和色度的去除率分别达到60.50%和96.80%.同时发现, 通过升温和增加过氧化氢的投加量不能够使废水COD和色度的去除率进一步提高, 故引入Cu²⁺作催化剂来实现CWPO过程, 在220℃、8min、0.1MPa条件下, CWPO对同一废水的COD和色度的去除率分别达到82.50%和99.71%.通过计算得出CWPO与WPO相比基于COD的表观活化能降低了65.93%.

Abstract：Oxidation of Acid Red B in water by wet peroxide oxidation (WPO) and catalytic wet peroxide oxidation (CWPO) was explored in a continuous pressure reactor, using H₂O₂ as the oxidant. The effect of temperature, pressure, oxidant dose and catalyst on the oxidation process and the degradation efficiency was studied. The results indicated that Acid Red B can be degraded in WPO which have the stable structure at lower temperature and pressure compared with the traditional wet air oxidation, and 60.50% of COD removal and 96.80% of colour reduction were achieved at 220℃ for 8μmin, at 0.1μMPa when the initial concentration of Acid Red B-containing water was 1500μmg·L^-1. The COD and colour removal efficiency cannot be improved by increasing the temperature and raising the peroxide dosage, when Cu²⁺ was introduced into the CWPO process, 82.50% COD removal and 99.71% colour reduction were obtained at 220℃ and 0.1μMPa for 8μmin. Through calculation, the activation energy of CWPO decrease by 65.93% compared with WPO.