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首页> 外文期刊>Separation and Purification Technology >Granular activated carbon(GAC)adsorption-photocatalysis hybrid system in the removal of herbicide from water
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Granular activated carbon(GAC)adsorption-photocatalysis hybrid system in the removal of herbicide from water

机译：颗粒活性炭（GAC）吸附-光催化混合系统去除水中除草剂

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摘要

The performance of the granular activated carbon(GAC)fixed bed adsorption,the continuous photocatalysis systems and a combination of the two were studied to evaluate their capabilities in removing the herbicide of metsulfuron-methyl(MM)from waste water.Columns packed with GAC at different bed depths were operated at different filtration rates over a period of several weeks.Removal of MM via adsorption using GAC fixed beds of 5,10 and 15 cm depths(operated at meter per hour)achieved a removal of 35,55 and 65% of MM respectively.In the continuous photocatalysis system,heterogeneous photocatalysis with TiO2 was used to degrade MM.The system achieved removal rates between 40 and 60%.GAC photocatalysis hybrid system is a coupling of GAC fixed bed adsorption and the continuous photocatalysis system where the effluent from the former was fed to the later.TiO2 and small amount of powder activated carbon(PAC)were used as the catalyst in the photocatalysis system.The system had a high removal rate of over 90%.The retention time of the photocatalysis system was less than 10 min.This system allows a greater degree of flexibility in the manner the system can be operated.
机译：研究了颗粒状活性炭（GAC）固定床的吸附性能，连续光催化系统以及两者的组合，以评价其在去除甲磺隆甲基（MM）除草剂中的能力。在几周的时间内以不同的过滤速率运行不同的床深度。使用5,10和15 cm深度的GAC固定床（以米每小时运行）通过吸附去除MM，可去除35,55和65％在连续光催化系统中，TiO2均相光催化降解MM，系统去除率在40％至60％之间。前者的废水进料到后者，光催化系统中使用TiO2和少量粉末活性炭（PAC）作为催化剂，该系统具有较高的去除率te超过90％。光催化系统的保留时间少于10分钟。该系统在操作方式上具有更大的灵活性。

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