催化氧化法处理哥俩好生产废水研究

催化氧化法处理哥俩好生产废水研究
摘  要
胶水生产过程中产生大量的废水，不仅占用了大量的空间还严重危害了环境，必须经过处理达到排放标准才可排除，催化氧化法是一种处理高浓度难降解的有机废水的一项重要技术，本实验是利用混凝-光催化氧化法来处理哥俩好生产废水。
该实验以混凝-光催化氧化为原理基础。通过混凝、Fenton试剂和紫外光照射降低合成胶废水COD,催化剂是硫酸亚铁和过氧化氢。最后达到排放标准排除。
经过混凝-光催化氧化等一些性质的检测和合成胶废水COD浓度的测定后，进行实验。同时对不同参数初始铁离子浓度，双氧水浓度，反应时间和pH值对合成胶废水COD去除率的影响进行评测，确定了最佳的反应条件。并利用催化剂不同条件时合成胶废水COD去除率进行检测，证明混凝-光催化氧化法处理高浓度COD合成胶废水效果的环境变量参数pH=1.5，COD=200000mg/L，混凝剂为硫酸亚铁或聚合硫酸铁，pH=3.0～5.0，氧化时间为2h，采用化学混凝-光催化氧化法处理合成胶废水可获得97.1%COD的去除率。化学混凝-光催化氧化处理合成胶废水的另一个优点是可提高合成胶废水的可生化性。光催化氧化法产生处理效果主要是靠反应过程中生成的非常活跃的氧化自由基-羟基自由基•OH。羟基自由基•OH能够逐渐氧化分解难降解的人工合成的化合物或天然的有机混合物甚至最终把他们都氧化成CO2和H2O。这都要归功于它在水溶液中的高氧化电极电位。
关键词:混凝-光催化氧化法, fenton,合成胶废水,高浓度COD

Study on several chelating agents enhanced phytoremediation for lead-contaminated soil
 
Abstract
Cement production process produce large amounts of water not only takes up a lot of space but also severely threaten the environment, must be treated to meet emission standards. The catalytic oxidation is a high concentration of organic waste biodegradation technology, so I design experiments is the use of Coagulation–photocatalytic oxidation method to handle ge lia hao produce wastewater.
 The experiment with Coagulation–photocatalytic oxidation based on photo catalytic oxidation principles. By fenton reagent and UV irradiation reduced synthetic rubber wastewater COD, The catalyst is ferrous sulfate and hydrogen peroxide. Finally meet emission standards for exclusion. 
After a number of Coagulation–photocatalytic oxidation properties of detection and determination of synthetic rubber wastewater COD concentration after the experiment. At the same time on different parameters of initial iron ion concentration, hydrogen peroxide concentration, reaction time and pH value on the synthetic rubber wastewater COD removal rate for evaluation to determine the optimal reaction conditions. And the use of catalysts in different conditions to detect synthetic rubber wastewater COD removal rate, that Coagulation - photocatalytic oxidation treatment of highly concentrated wastewater of COD synthetic rubber environment variable parameters pH = 1.5, COD = 200000mg / L , which the ferric sulfate or poly–ferric sulfate was coagulating agent, pH=3.0～5.0, oxidation reaction time = 180min, Coagulation–photocatalytic oxidation process with synthetic rubber wastewater COD removal efficiency obtained 97.1%. Photo catalytic oxidation of synthetic rubber wastewater Another advantage is that synthetic rubber can improve the biodegradability of wastewater. Photocatalytic oxidation treatment effect produced during the reaction is mainly generated by a very active free radicals–hydroxyl radical •OH. Hydroxyl radical •OH can gradually oxidative decomposition of biodegradable synthetic or natural organic compounds or mixtures of them are ultimately oxidized to CO2 and H2O. This must be due to its high oxidation in aqueous solution the electrode potential.
Key words: Coagulation–photocatalytic oxidation, Fenton, synthetic rubber wastewater, high concentrations of COD

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