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首页> 外文期刊>Asian journal of water, environment and pollution >Preparation of Fly Ash Based Zeolite for Fluoride Removal
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Preparation of Fly Ash Based Zeolite for Fluoride Removal

机译：粉煤灰基除氟沸石的制备

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Fluoride contamination of drinking water is a worldwide phenomenon and scientists are working relentlessly to find ways to remove fluoride from drinking water. Out of the different methods employed for removal of fluoride from drinking water, adsorption process is the most suitable because in this process the adsorbent is regenerated. In the present study fly ash is used as the raw material, which is treated with alkali (NaOH) to form NaPl zeolite. This zeolite is then subjected to characterization by standard procedures. It is found that the synthesized zeolite has more crystalline character than the raw fly ash and has also residual positive charge on its surface. The synthesized zeolite is employed for removal of fluoride under varying pH, contact time, initial concentration of fluoride, temperature and adsorbent dose etc. The adsorption data is then put into Freundlich and Langmuir Isotherm. It is found that the equilibrium data for removal of fluoride by adsorption onto synthesized zeolite fits better into the Langmuir isotherm than the Freundlich isotherm.
机译：饮用水中的氟化物污染已成为一种世界性现象，科学家正在不懈地努力寻找从饮用水中去除氟化物的方法。在从饮用水中除去氟化物的不同方法中，吸附工艺是最合适的，因为在此工艺中，吸附剂会再生。在本研究中，粉煤灰用作原料，用碱（NaOH）处理后形成NaPl沸石。然后通过标准程序对该沸石进行表征。发现合成的沸石具有比生粉煤灰更高的结晶特性，并且在其表面上还具有残留的正电荷。合成的沸石用于在不同的pH值，接触时间，氟化物的初始浓度，温度和吸附剂剂量等条件下去除氟化物。然后将吸附数据输入Freundlich和Langmuir等温线。发现通过吸附到合成沸石上除去氟的平衡数据比弗氏等温线更适合朗格缪尔等温线。

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