Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Characteristics of Chlorination Byproducts Formation of Amino Acid Compounds

아미노산 성분에서의 염소 소독부산물 생성 특성

  • Son, Hee-Jong (Water Quality Institute, Busan Water Authority) ;
  • Choi, Young-Ik (Department of Environmental Engineering, Silla University) ;
  • Bae, Sang-Dae (Department of Environmental Engineering, Silla University) ;
  • Jung, Chul-Woo (Ulsan Regional Innovation Agency, Ulsan Industry Promotion Techno Park)
  • 손희종 (부산광역시 상수도사업본부 수질연구소) ;
  • 최영익 (신라대학교 환경공학과) ;
  • 배상대 (신라대학교 환경공학과) ;
  • 정철우 (울산산업진흥TP 전략산업기획단)
  • Published : 2009.05.30
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Abstract

This study was conducted to analyze and determine formation potentials for chlorination disinfection by-products (DBPs) from twenty amino acid compounds with or without $Br^-$. Two of twenty amino acid compound were tryptophan and tyrosine that were relatively shown high for formation of trihalomethanes (THMs)/dissolved organic carbon (DOC) whether or not $Br^-$ presented. Other 18 compounds were shown low for formation of THMs/DOC whether or not $Br^-$ presented. Five amino acid compounds that were tryptophan, tyrosine, asparagine, aspartic acid and histidine were shown high for formation of haloacetic acids (HAAs)/DOC whether or not $Br^-$ presented. Although formation of dichloroacetic acid (DCAA) was dominated in asparagine, aspartic acid and histidine, trichloroacetic acid (TCAA) was dominated in tryptophan and tryptophan. The formation of haloacetnitriles (HANs)/DOC whether or not $Br^-$ presented was high in Aspartic acid, histidine, asparagine, tyrosine and tryptophan. Specially, aspartic acid was detected 660.2 ${\mu}$g/mg (HAN/DOC). Although the formation of chloralhydrate (CH)/DOC was shown high in asparagine, aspartic acid, histidine, methionine, tryptophan and tyrosine, the formation of Chloropicrin (CP)/DOC was low (1 ${\mu}$g/mg) in twenty amino acid compounds. The formations of THM, HAA and HAN were also investigated in functional groups of amino acids. The highest formation of THM was shown in amino acids compounds (tryptophan and tyrosine) with an aromatic functional group. Highest, second-highest, third-highest and fourth-highest functional groups for formation of HAA were aromatic, neutral, acidic and basic respectively. In order of increasing functional groups for formation of HAN were acidic, basic, neutral and aromatic.

20종의 아미노산 성분들에서의 염소 소독부산물 생성 특성을 조사한 결과, 단위 DOC당 THM 생성능은 Br 첨가 유무에 관계없이 tryptophan과 tyrosine에서 높게 나타났고 나머지 18종에서는 매우 낮은 생성능을 나타내었다. 단위 DOC당 HAA 생성능 조사결과, tryptophan, tyrosine, asparagine, aspartic acid 및 histidine에서 Br 첨가 유무에 관계없이 높은 생성능을 보였으며, asparagine, aspartic acid 및 histidine은 DCAA 생성능 조사결과, aspartic acid, histidine, asparagine, tyrosine 및 tryptophan에서 Br 첨가 유무에 관계없이 높은 생성능을 나타내었으며, aspartic acid는 660.2 ${\mu}$g/mg으로 나타나 다른 아미노산 성분들에 비해 월등히 높은 HAN 생성능을 나타내었으며, 반응성이 높은 6종의 아미노산 성분에서 생성되는 HAN 구성종의 대부분은 DCAN으로 나타났다. 단위 DOC당 chloral hydrate 와 chloropicrin의 생성능을 조사결과에서 chloral hydrate는 asparagine, aspartic acid, histidine, methionine, tryptophan 및 tyrosine에서 생성능이 높은 것으로 나타났고, chloropicrin의 경우는 20종의 아미노산에서 전체적으로 1${\mu}$g/mg 이하의 아주 낮은 생성능을 보였다. 아미노산의 작용기별 소독부산물 생성 특성은 THM의 경우 방향족(aromatic) 화합물인 tryptophan과 tyrosine에 반응성이 높았고, HAA는 aromatic, neutral, acidic, basic 순으로 반응성을 보였으며, HAN은 acidic, basic, neutral, aromatic 순으로 반응성을 나타내어 방향족 화합물보다 지방족 화합물이며 친수성인 물질에서 반응성이 더 높은 것으로 나타났다.

Keywords

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