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Inhibition of Cationic Polymer-Induced Colloid Flocculation by Polyacrylic Acid
http://hdl.handle.net/2241/00154162
http://hdl.handle.net/2241/00154162aef448a5-e977-4702-9465-5d177d0a387b
名前 / ファイル | ライセンス | アクション |
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Water_10-9 (1.0 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2019-01-28 | |||||
タイトル | ||||||
タイトル | Inhibition of Cationic Polymer-Induced Colloid Flocculation by Polyacrylic Acid | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
山下, 祐司
× 山下, 祐司× 足立, 泰久× Lim, Voon× Doan, Yen |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Although the dosage of cationic flocculants used for water treatment is well known to increase in the presence of natural organic matter (NOM), the underlying reasons for this increase are not properly understood. Herein, we studied the flocculation behavior of polystyrene latex (PSL) particles in the presence and absence of polyacrylic acid (PAA5K) as an NOM analogue using an end-over-end rotation apparatus for standardized flow mixing. In the absence of PAA5K, the initial rate of cationic flocculant (PAM5M)-induced flocculation was enhanced, as reflected by the size of flocculant in solution. Additionally, flocculation experiments were performed in the presence of 0.5 mg/L PAA5K for five concentrations of PAM5M and two ionic strengths, and the increase of the initial rate of PAM5M-induced flocculation was suppressed by PAA5K immediately after mixing, with the most pronounced suppression obtained at a PAM5M concentration similar to PAA5K. Based on the above insights and the results of viscosity measurements, the inhibitory effect of PAA on flocculation was ascribed to (1) the reduction of PAM charge and the concomitant shrinkage via electrostatic association with PAA and (2) the termination of polycation adsorption on PSL caused by polyion complex formation when the charge ratio of PAM:PAA is close to unity. | |||||
書誌情報 |
Water 巻 10, 号 9, p. 1215, 発行日 2018-09 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2073-4441 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.3390/w10091215 | |||||
権利 | ||||||
権利情報 | © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | MDPI |