H_2O_2湿式氧化处理含酸性红B染料模拟废水的研究

Treatment of Acid Red B-containing water by wet peroxide oxidation

用H2 O2 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 2 2 0℃、8min、0 1MPa时 ,含1 5 0 0mg·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 6 0 5 0 %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 2 2 0℃、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 5 0 %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 6 5 93 % .

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 H_2O_2 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 8?min, at 0.1?MPa when the initial concentration of Acid Red B-containing water was 1500?mg·L^(-1). The COD and colour removal efficiency cannot be improved by increasing the temperature and raising the peroxide dosage, when Cu^(2+) was introduced into the CWPO process, 82.50% COD removal and 99.71% colour reduction were obtained at 220℃ and 0.1?MPa for 8?min. Through calculation, the activation energy of CWPO decrease by 65.93% compared with WPO.