Sorption Capacity of Mesoporous Metal Oxides for the Removal of MCPA from Polluted Waters

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• 作者：Veria Addorisio ; Serena Esposito ; Filomena Sannino
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2010
• 出版时间：April 28, 2010
• 年：2010
• 卷：58
• 期：8
• 页码：5011-5016
• 全文大小：776K
• 年卷期：v.58,no.8(April 28, 2010)
• ISSN：1520-5118

文摘

A study was performed to assess the sorption capacity of the phenoxy acid herbicide, MCPA, on two mesoporous oxides, Al₂O₃ and Fe₂O_3, by using a batch equilibrium method. Effects of pH, contact time, initial concentration and sorbent dosage on the sorption of the herbicide were investigated. The collected data evidenced the greater sorption efficiency of Al₂O₃ with respect to Fe₂O₃. These results can be explained by considering the specific mesoporous structure of Al₂O₃ together with the greater value of surface area. MCPA is assumed to be bound to Al₂O₃ and Fe₂O₃ by a combination of ionic and ion−dipole bonding. Both oxides present as sorbents for a fast and highly efficient removal of MCPA from contaminated waters. For the first time the possible use of mesoporous metal oxides to remove MCPA from contaminated wastewaters identifies these sorbents as suitable filters for the decontamination of point sources.