Volume 13, Issue 1 (3-2017)
J Health Syst Res 2017, 13(1): 119-125 |
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Naghsh M, Shams K. Removal of Nitrate Anion from Water by Surfactant Modified Carbonate Cancrinite Zeolite. J Health Syst Res 2017; 13 (1) :119-125
URL: http://hsr.mui.ac.ir/article-1-908-en.html
URL: http://hsr.mui.ac.ir/article-1-908-en.html
1- PhD Candidate, Department of Chemical Engineering, School of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran
2- Professor, Department of Chemical Engineering, School of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran
2- Professor, Department of Chemical Engineering, School of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran
Abstract: (1084 Views)
Background: High nitrate concentration in drinking water has negative effects on human health. The aim of this research was the synthesis and characterization of high purity carbonate cancrinite zeolite and its surface modification in order to remove nitrate anions from water.Methods: High purity carbonate cancrinite zeolite was synthesized hydrothermally using kaolin. Synthesis time was reduced using bath ultrasound aging. After characterization, cationic surfactant modified zeolite was prepared. Optimally modified zeolite was used for removing nitrate from water.Findings: High purity carbonate cancrinite zeolite was synthesized at 200 °C using kaolin in a mixture of 6 molar NaOH and 0.05 molar Na2CO3. The synthesis time was reduced to less than half by using bath ultrasound aging for 90 minutes. The high external cation exchange capacity (ECEC) of the synthesized zeolite justifies its surface modification for anion removal from water. Based on the Langmuir isotherm model, maximum monolayer nitrate adsorption capacity was predicted to be 35.33, 28.41, and 17.06 mg/g at 20, 30, and 40 °C, respectively.Conclusion: High purity carbonate cancrinite zeolite with high ECEC can be synthesized using kaolin, and using bath ultrasound aging considerably reduces the synthesis time. Surfactant modified synthesized zeolite, compared to natural and other synthesized zeolite, can be effectively used for nitrate removal from water.
Type of Study: Research |
Subject:
education health and promotion
Received: 2020/07/16 | Accepted: 2021/01/10 | Published: 2021/01/10
Received: 2020/07/16 | Accepted: 2021/01/10 | Published: 2021/01/10
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