7종의 뇨 성분에서의 염소 소독부산물 생성 특성을 조사한 결과, kynurenine, indole 및 uracil에서 단위 DOC당 염소 소독 부산물 생성능이 비교적 높게 나타났다. Kynurenine, indole 및 uracil에 대해 Br$^-$ 첨가 유무에 따른 THMs/DOC를 조사한 결과, Kynurenine은 Br$^-$를 첨가하지 않은 경우, THMs/DOC가 86.9 $mu$g/mg으로 나타났으며, Br$^-$를 첨가하였을 경우는 THMs/DOC는 100.8 $mu$g/mg으로 Br$^-$를 첨가하지 않은 경우보다 높게 나타나고 있다. Indole의 경우도 Br$^-$를 첨가하지 않은 경우 보다 Br$^-$을 첨가한 경우에 THMs/DOC가 6.58 $mu$g/mg에서 31.4 $mu$g/mg 정도로 높아지는 것으로 조사되었다. 또한, HAAs/DOC를 조사한 결과에서도 kynurenine에서 가장 높은 생성능을 보이고 있으며, 다음으로 uracil과 indole 순으로 조사되었다. 특히, THMs의 경우와는 반대로 kynurenine과 indole에서 Br$^-$이 첨가된 경우 HAAs/DOC가 현저히 감소되는 것으로 나타나고 있다. Br$^-$를 첨가하지 않은 경우에 kynurenine과 indole에서는 생성된 HAAs의 대부분을 TCAA가 차지하고 있는 것으로 나타났으나, uracil의 경우는 DCAA의 생성능이 높은 것으로 나타났다. Br$^-$ 첨가 유무에 따른 HANs/DOC를 조사한 결과에서는 kynurenine에서의 생성능이 가장 높았고, 대부분이 DCAN으로 나타났으며, Uracil의 경우에는 염소처리에 의해 HAN은 생성되지 않았다. 또한, CH/DOC 조사결과에서는 kynurenine과 indole에서는 낮은 생성능을 보인 반면, uracil의 경우 CH/DOC가 Br$^-$를 첨가하지 않은 시료에서는 1,270 $mu$g/mg, Br$^-$를 첨가한 시료에서는 1,027 $mu$g/mg으로 나타나 매우 높은 반응성을 나타내고 있다. Kynurenine, indole 및 uracil에 대해 Br$^-$ 첨가 유무에 따른 THMs과 HAAs 생성능 변화를 살펴본 결과, kynurenine과 indole의 경우는 Br$^-$가 첨가되었을 경우 THMs/DOC가 높아지는 것으로 나타나고 있다. Kynurenine은 Br$^-$가 첨가되었을 경우 THMs/DOC가 큰 폭으로 증가한 것이라기보다는 HAAs/DOC가 감소되어 Br$^-$ 첨가에 따라 THMs/DOC가 큰 것으로 나타났으며, indole의 경우는 kynurenine과는 반대로 THMs/DOC가 증가하여 나타난 결과이다.
This study was conducted to analyze and determine the formation potential of chlorination DBPs from seven urinary compounds with or without Br$^-$. Three of seven components were kynurenine, indole and uracil that were relatively shown high the formation potential of chlorination DBPs concentrations. The reported results of THMs/DOC with or without Br$^-$ in kynurenine showed that THMs/DOC was detected 86.9 $mu$g/mg when Br$^-$ was not added, and THMs/DOC was detected 100.8 $mu$g/mg when Br$^-$ was presented. In indole, THMs/DOC was increased from 6.58 $mu$g/mg to 31.4 $mu$g/mg when Br$^-$ was added. Moreover, among them, the highest, second-highest and third-highest HAAs/DOC were shown in kynurenine, uracil and indole respectively. Specially, HAAs/DOC was significantly deceased in kynurenine and indole when Br$^-$ was presented. This was a totally different phenomenon for THMs/DOC. TCAA was dominated in HAAs for kynurenine and indole, and DCAA was also dominated in HAAs for uracil. The highest formation of HANs/DOC was shown in kynurenine whether or not Br$^-$ presented, and DCAN was predominant in HANs. HANs was not formed by chlorination in uracil. In addition, the formation of CH/DOC was relatively low in kynurenine and indole. The formation of CH/DOC was specially high(1,270 $mu$g/mg) in uracil when Br$^-$ was not added. The formation of CH/DOC was 1,027 $mu$g/mg in uracil when Br$^-$ was added. The formations of THMs and HAAs were also investigated in kynurenine, indole and uracil when Br$^-$ was presented or not. The formation of THMs/DOC was higher in kynurenine and indole when Br$^-$ was presented. The formation of HAAs/DOC was reduced in kynurenine when Br$^-$ was added. The result could be attributed to higher formation of THMs/DOC in kynurenine when Br$^-$ was added. The formation of HAAs/DOC was also reduced in indole when Br$^-$ was added. To the contrary, this result was not attributed to higher formation of THMs/DOC in indole when Br$^-$ was added.
