摘要
探讨了太阳光助 Fenton体系对苯酚的氧化降解。结果表明 ,太阳光能有效地增强 Fenton试剂对苯酚的氧化降解 ,在晴天较强太阳光照下 ,Fenton试剂可在较短时间内使较高浓度的苯酚完全矿化。反应体系的初始 p H值及Fe2 +用量均对苯酚的氧化降解有明显影响 ,反应的适宜 p H值在 3～ 4的酸性范围内 ;适量 Fe2 +参与的太阳光 - Fenton反应有助于苯酚的降解 ,但过高的 Fe2 + 用量反而不利于苯酚的降解。实验结果还表明 ,采用分批多次投加的方式可明显捉高氧化剂 H2 O2 的利用效率 ,降低 H2 O2 的消耗量 ;苯酚废水降解的主要中间产物为苯醌和有机酸 ;一定程度的太阳光 -Fenton预氧化处理可使废水的 BOD5/ CODcr比值由 0 .10捉高到 0 .3 2 。
The degradation of phenol in water by solar photo fenton processes was studied.Complete mineralization of 500mg/L phenol in sunny day was achieved by solar photo fenton oxidation as adding 2200mg/L H 2O 2.The results show that initial pH has significant effect on solar photo fenton processes,the degradation effects are optimal at pH 3～4.Effective degradation was observed a adding the right amount of Fe 2+ ,high content of Fe 2+ was unfavorable to phenol degradation by solar photot fenton processes.The high reaction efficiency was obtained by adding hydrogen peroxide slowly in several steps compared with that accieved in a ingle step.The main intermediate products of phenol in the photo fenton degradation processes were benzoquinone and organic acids.The biological degradativities of phenolic wastewater could be improved distinctly by solar photo fenton preoxidation.
出处
《重庆环境科学》
北大核心
2003年第4期23-25,32,共4页
Chongqing Environmental Science
基金
武汉市青年科技晨光计划资助项目 (2 0 0 1 50 0 50 64)
