パルプ製造排水の凝集処理に関する研究　３　　リグニンの凝集機構

DOI Web Site

書誌事項

タイトル別名
  • Studies on Coagulation Treatment of Spent Water from Pulping Process (Part 3)
  • パルプ セイゾウ ハイスイ ノ ギョウシュウ ショリ ニカンスルケンキュウ 3
  • リグニンの凝集機構

この論文をさがす

抄録

Coagulation mechanism of lignin with Al2 (SO4) 3 as a coagulant was investigated. Aluminium ion combines to acidic groups of lignin, such as sulfonic acid and carboxylic acid groups, and then aluminium polynuclear complexes and insoluble aluminium hydroxide are formed by pH adjustment in a state including lignin combined with aluminium ions. Floc thus formed becomes larger by binding each together, and readily precipitates.<BR>ζ-Potential of floc measured by microelectrophoresis is generally considered to be the indicator for setting the best coagulation pH. However, in the case of lignin as pollutant, it is not easy to find the best coagulation pH by ζ-potential measurement, because its value changes remarkably with both coagulation pH and relative concentration of lignin. Lignin floc formed by coagulation with excessive amount of Al2 (SO4) 3 shows the minimum value of ζ-potential at the best coagulation pH. On the other hand, ζ-potential of lignin floc formed with a small amount of Al2 (SO4) 3 by the usual way increases simply with the increase of pH.

収録刊行物

  • 紙パ技協誌

    紙パ技協誌 31 (3), 166-172, 1977

    紙パルプ技術協会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ