油页岩灰渣合成P型沸石及对Co^(2+)吸附性研究

Synthesis of P-Type Zeolite from Oil Shale Ash and Its Adsorption to Co^(2+)

以油页岩灰渣为研究对象,采用碱熔-水热合成法合成P型沸石,研究了灰碱比、碱熔温度、水热温度、NaCl添加量等条件对合成P型沸石的影响,并利用制备的P型沸石进行了对Co^(2+)的吸附性能试验,结果表明,NaCl的添加有利于沸石合成,而灰碱比、碱熔温度、水热温度的提高不利于沸石合成。油页岩灰渣与P型沸石对废水中Co^(2+)的去除率都随着吸附剂投加量的增加而呈上升趋势。P型沸石对Co^(2+)的吸附性能优于油页岩灰渣。并且随着Co^(2+)溶液初始浓度的增加,P型沸石对Co^(2+)的去除率逐步递减。

The thesis takes oil shale ash as the research object,adopts alkali fusion-hydrothermal synthesis method to synthesize P-type zeolite,and studies the influence of ash-alkali ratio,alkali fusion temperature,hydrothermal temperature,NaCl addition amount,and other conditions on the synthesis of P-type zeolite.And using the prepared P-type zeolite to carry out the Co^(2+)adsorption experiment.The results show that the addition of NaCl is beneficial to the synthesis of zeolite,while the increase in the ash-alkali ratio,alkali fusion temperature,and hydrothermal temperature is not conducive to the synthesis of zeolite.The removal rate of Co^(2+)in wastewater by oil shale ash and P-type zeolite shows an upward trend with the increase of adsorbent dosage.The adsorption performance of P-type zeolite for Co^(2+)is better than that of oil shale ash.And with the increase of the initial concentration of Co^(2+)solution,the removal rate of Co^(2+)by P-type zeolite gradually decreases.