...The phenomenon in which fine particles dispersed in a liquid come together to form larger aggregates is called flocculation, and the agglomerates produced by flocculation are called aggregates or flocs. Flocculants are chemicals added to slurries (particle suspensions) to promote flocculation. Commonly used flocculants are broadly divided into inorganic flocculants and organic polymer flocculants. Inorganic flocculants are electrolytes that generate multivalent cations such as aluminum and calcium in the liquid, and cause flocculation by neutralizing the charge on the particle surface, which is the cause of repulsion between particles (i.e. dispersion). ... *Some of the terminology that mentions "floc" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…液中に分散する微粒子が会合して,より大きな集合体となる現象を凝集flocculation(coagulation)と呼び,凝集によって生成する集塊を凝集体またはフロックflocと呼ぶ。凝集剤は凝集を助長するためにスラリー(粒子懸濁液)に添加する薬剤である。 一般に用いられている凝集剤は無機凝集剤と有機高分子凝集剤に大別される。無機凝集剤は,液中にアルミニウムやカルシウムなどの多価陽イオンを発生する電解質であって,粒子相互の反発(すなわち分散)の原因である粒子表面の荷電を中和させる作用により,凝集をひき起こす。… ※「floc」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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