Nitrate removal from aqueous solution with modified clinoptilolite zeolite
Subject Areas :
َAzadeh jodaei
1
(
department of chemistry azad university sofian branch
)
azam afaghi
2
(
islamic azad university of sofian
)
darooush yousefpour
3
(
Employee of the Standards Department
)
Keywords: Natural Clinnoptiolite zeolite, Copper oxide, Iron oxide, Removal of sodium nitrate,
Abstract :
Nitrate ions are considered as a serious threat to surface and underground water sources due to their high solubility in water. Therefore, it is necessary to remove them from water sources. There are many ways to remove nitrate from water. Among the simple ones, removal with adsorbents such as zeolites can be mentioned. In this research, particles of copper oxide/iron oxide were loaded on the Miyaneh clinoptilolite zeolite. The physical and chemical properties of prepared nanosorbents were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflection spectroscopy (DRS), and specific surface area measurement by BET method. After choosing the appropriate adsorbent, The effects of operating parameters such as pollutant concentration, adsorbent dose, and solution pH on the removal efficiency were investigated. The highest nitrate adsorption efficiency was obtained on clinoptilolite zeolite loaded with 5% copper oxide at pH around 4-9, at low nitrate concentrations, and adsorbent dose of 15 mg/l.
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