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首页> 外文会议>Global Symposium on Recycling, Waste Treatment and Clean Technology; 20040926-29; Madrid(ES) >DEGRADATION OF PHENOL INDUSTRIAL WASTE WATERS USING NEW PHOTOCATALYSTS AND OZONE
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DEGRADATION OF PHENOL INDUSTRIAL WASTE WATERS USING NEW PHOTOCATALYSTS AND OZONE

机译：使用新型光催化剂和臭氧降解酚工业废水

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Phenol is a major environment contaminated from various industries such as coke, pesticides, insecticides, fungicides and dyes due to high toxicity on the skin, eyes and mucous membrane in humans. Industrial wastewater containing phenol are conventional treated by FeSO_4 and H_2O_2 to oxidize phenol to CO_2 and H_2O. FeSC>4 is converted to Fe_2(SO_4)_3 and H_2O_2 is decomposed and then the reactants could not be recycled. In addition the ferric sulfate is dumped and water is not reused. A new process was developed based on treatment with V_2O_5-SiO_2 photocatalyst and ozone in presence of UV light. The process is advantageous as the photocatalysts could be recycled and water could be reused. The process was successfully applied for treatment of wastewater produced from coke plant. The percent degradation of the phenol is increased from 47.31 to 72 % using V_2O_5-SiO_2 xerogel loading from 0.333 to 1.333 wt. % in presence of UV light. The rate constant was increased from 0.0025 to 0.0036 min~(-1) using different V_2O_5-SiO_2 xerogel loading and the reaction kinetics were found to be first order. On the other hand, the optimum conditions of photocatalytic degradation of phenol using ozone were obtained as the following: 1.6 wt. % ozone concentration and 0.85 m~3/h airflow. The phenol removal efficiency using these conditions was 99%. The reaction was found to obey first order reaction.
机译：苯酚是一种主要环境，由于对人体皮肤，眼睛和粘膜有高毒性，因此受到可乐，农药，杀虫剂，杀真菌剂和染料等各种行业的污染。常规用FeSO_4和H_2O_2处理含苯酚的工业废水，以将苯酚氧化为CO_2和H_2O。 FeSC> 4转化为Fe_2（SO_4）_3，H_2O_2分解，反应物无法循环使用。另外，硫酸铁被倾倒并且水不被再利用。基于在紫外线下存在的V_2O_5-SiO_2光催化剂和臭氧的处理，开发了一种新工艺。该方法是有利的，因为光催化剂可以被回收并且水可以被再利用。该工艺已成功用于处理焦化厂产生的废水。使用V_2O_5-SiO_2干凝胶载量从0.333重量％增加到1.333重量％，苯酚的降解百分比从47.31增加到72％。 ％存在紫外线。在不同的V_2O_5-SiO_2干凝胶负载下，速率常数从0.0025增加到0.0036 min〜（-1），反应动力学是一级的。另一方面，获得如下的使用臭氧的光催化降解苯酚的最佳条件：1.6重量％。 ％的臭氧浓度和0.85 m〜3 / h的气流。在这些条件下的苯酚去除效率为99％。发现该反应服从一级反应。

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