https://scholars.lib.ntu.edu.tw/handle/123456789/78091
標題: | Kinetics of Copper Complexation with Dissolved Organic Matter Using Stopped-Flow Fluorescence Technique | 作者: | 林正芳 Houng, Lee-Ming 駱尚廉 Lin, Cheng-Fang Lo, Shang-Lien |
關鍵字: | Cu(II) complexation; dissolved organic matter; kinetics; stopped-flow technique | 公開日期: | 1994 | 卷: | 43 | 期: | 1-2 | 起(迄)頁: | 1-12 | 來源出版物: | Toxicological and Environmental Chemistry | 摘要: | This study provided direct observations on reaction kinetics of Cu and dissolved organic matter (DOM). Stopped-flow method and fluorescence technique were used to measure Cu(II)-DOM complexation over time. Suwannee River reference fulvic acid and water soluble soil organic matter were used as model DOM. Experimental conditions of pH 6, 5 × 10–5M Cu(II), and 5 mg C/L of DOM were used and the results were to simulate the relevant natural conditions. Both organic ligands reacted fairly rapidly with Cu(II). Reaction half-life of DOM was in the millisecond range. Two types of metal binding sites of organic ligands were identified. Fulvic acid yield forward rate constants: 1 × 106M-1s-1and 5.15 × 103M-1s-1, based on second-order reaction rate model. Water soluble soil organic matter gave forward rate constants: 1.34 × 105M-1s-1and 2.2 × 103M-1s1. From comparison of kinetic natures, the fast-reacting ligands were comparable to nitrilotriacetic acid (NTA) and slow-reacting ligands were more like salcylic acid. © 1994, Taylor & Francis Group, LLC. All rights reserved. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/124333 https://www.scopus.com/inward/record.uri?eid=2-s2.0-0028042117&doi=10.1080%2f02772249409358012&partnerID=40&md5=22c133e6d4ca45a9f372b9c80511676a |
ISSN: | 2772248 | SDG/關鍵字: | Copper complexation; Dissolved organic matter; Stopped flow fluorescence technique; Complexation; Copper; Fluorescence; Heavy metals; Measurements; Monitoring; Reaction kinetics; Removal; Water treatment |
顯示於: | 環境工程學研究所 |
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