한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제22권5호
  • /
  • Pages.958-967
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  • 2006
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  • 2289-0971(pISSN)
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  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
권호 표지

응집 pH와 응집제 종류에 따른 Al(III)가수분해종 특성변화에 대한 연구

A Study of Al(III) Hydrolysis Species Characterization under Various Coagulation Condition

  • 송유경 (부경대학교 토목공학과) ;
  • 정철우 (울산산업진흥TP 전략산업기획단) ;
  • 손인식 (부경대학교 토목공학과)
  • Song, Yu-Kyung (Division of Construction Engineering, Pukyong National University) ;
  • Jung, Chul-Woo (Ulsan Regional Innovation Agency, Ulsan Industry Promotion Techno Park) ;
  • Sohn, In-Shik (Division of Construction Engineering, Pukyong National University)
  • 투고 : 2006.06.21
  • 심사 : 2006.09.01
  • 발행 : 2006.09.30
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초록

The overall objective of this research was to find out the role of rapid mixing conditions in the species of hydrolyzed Al(III) formed by Al(III) coagulants and to evaluate the distribution of hydrolyzed Al(III) species by coagulant dose and coagulation pH. When an Al(III) salt was added to water, monomers, polymers and solid precipitates may form. Different Al(III) coagulants (alum and PSOM) show to have different Al(III) species distribution over a rapid mixing condition. During the rapid mixing period, for alum, formation of dissolved AI(III) (monomer and polymer) increases, but for PSOM, precipitates of $Al(OH)_{3(S)}$ increases rapidly. During the rapid mixing period, for high coagulant dose, Al-ferron reaction increases rapidly. The kinetic constants, Ka and Kb, derived from AI-ferron reaction. The kinetic constants followed very well the defined tendencies for coagulation condition. For pure water, when the rapid mixing time increased, the kinetic constants, Ka and Kb showed lower values. Also, for raw water, when the rapid mixing time increased, the kinetic constants, Ka and Kb showed lower values. At A/D(Adsorption and Destabilization) and sweep condition, both $Al(OH)_{3(S)}$ and dissolved Al(III) (monomer and polymer) exist, concurrent reactions by both mechanism appear to cause simultaneous precipitation.

키워드

참고문헌

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