Bi Xiaoyi, Wang Peng, Jiao Chunyan, Cao Hailei
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
J Hazard Mater. 2009 Sep 15;168(2-3):895-900. doi: 10.1016/j.jhazmat.2009.02.108. Epub 2009 Mar 3.
Experiments were conducted to investigate the removal of remazol golden yellow dye in order to assess the effectiveness and feasibility of microwave enhanced chlorine dioxide (ClO(2)) catalytic oxidation process. The catalyst used in this process was CuO(n)-La(2)O(3)/gamma-Al(2)O(3). The operating parameters such as the ClO(2) dosage, catalyst dosage, and pH were evaluated. The results showed that microwave enhanced catalytic oxidation process could effectively degrade remazol golden yellow dye with low oxidant dosage in a short reaction time and extensive pH range compared to the conventional wet catalytic oxidation. Under the optimal condition (ClO(2) concentration 80 mg/L, microwave power 400 W, contacting time 1.5 min, catalyst dosage 70 g/L, and pH 7), color removal efficiency approached 94.03%, corresponding to 67.92% of total organic carbon removal efficiency. It was found that the fluorescence intensity in microwave enhanced ClO(2) catalytic oxidation system was about 500a.u. which was verified that there was much hydroxyl radical produced. Compared with different processes, microwave enhanced ClO(2) catalytic oxidation system could significantly enhance the degradation efficiency. It provides an effective technology for dye wastewater treatment.
进行了实验以研究活性艳黄染料的去除，从而评估微波强化二氧化氯（ClO₂）催化氧化工艺的有效性和可行性。该工艺中使用的催化剂为CuO(n)-La₂O₃/γ-Al₂O₃。评估了二氧化氯用量、催化剂用量和pH等操作参数。结果表明，与传统湿式催化氧化相比，微波强化催化氧化工艺能在短反应时间内、在较宽的pH范围内以低氧化剂用量有效降解活性艳黄染料。在最佳条件下（二氧化氯浓度80mg/L、微波功率400W、接触时间1.5min、催化剂用量70g/L和pH7），脱色效率接近94.03%，对应总有机碳去除效率为67.92%。发现微波强化二氧化氯催化氧化体系中的荧光强度约为500a.u.，这证实产生了大量羟基自由基。与不同工艺相比，微波强化二氧化氯催化氧化体系能显著提高降解效率。它为染料废水处理提供了一种有效的技术。
