Fluidized zero valent iron bed reactor for nitrate removal
學年 93
學期 2
出版(發表)日期 2005-05-01
作品名稱 Fluidized zero valent iron bed reactor for nitrate removal
作品名稱(其他語言)
著者 Chen, Yi-ming; 李奇旺; Li, Chi-wang; Chen, Shiao-shing
單位 淡江大學水資源及環境工程學系
出版者 Elsevier
著錄名稱、卷期、頁數 Chemosphere 59(6), pp.753-759
摘要 A fluidized zero valent iron (ZVI) reactor is examined for nitrate reduction. Using the system, the pH of solution can be maintained at optimal conditions for rapid nitrate reduction. For hydraulic retention times of 15 min, the nitrate reduction efficiency increases with increasing ZVI dosage. At ZVI loadings of 33 g l−1, results indicate that the nitrate removal efficiency increases from less than 13% for systems without pH control to more than 92% for systems operated at pH of 4.0. By maintaining pH at 4.0, we are able to decrease the hydraulic retention time to 3 min and still achieve more than 87% nitrate reduction. The recovery of total nitrogen added as nitrate, ammonium, and nitrite was less than 50% for the system operated at pH 4.0, and was close to 100% for a system without pH control. The possibility of nitrate and ammonium adsorption onto iron corrosion products was ruled out by studying the behavior of their adsorption onto freshly hydrous ferric oxide at variable pH. Results indicate the probable formation of nitrogen gas species during reaction in pH 4.0.
關鍵字 Nitrate reduction;Zero valent iron;Fluidized bed reactor
語言 en
ISSN 0045-6535
期刊性質 國內
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產學合作
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審稿制度
國別 TWN
公開徵稿
出版型式 ,電子版
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