In order to prevent secondary pollution of tap water, corrosion characteristics are investigated, and corrosion index are calculated using LI and LR to manage corrosiveness. As targeted water treatment plants from 2014 (July, once) to 2015 (July and October, 2 times), 70 plants are selected by making a division for each area and water system. (treated water samples, n=240, raw water samples, n=72). In result of pH analysis, treated water was lower than raw water to 7.12, and 7.29, respectively. LI were investigated in the order of Seomjin river, Nakdong river, Han river, Geum river, to -2.08, -1.24, -1.11, -1.10 (at raw water), and -2.18, -1.59, -1.51, -1.35 (at treated water), respectively. In case of water quality goal value (LI = -1) in Japan as control of corrosiveness, management object was investigated about 83.3%.

In many countries in order to manage corrosion of water treatment process, it is currently using Langelier index (LI). However, management of the Larson's ratio (LR) to compare corrosion management and LI which can be generated by the water treatment process is required. In this study, in order to ensure data LR, factors associated with the actual corrosion resistance of water treatment plant was measured. Using the measured data, the model equation can be estimated alkalinity, and using the statutory water quality data, LR and alkalinity is estimated. At comparison of the measured value and estimated value of alkalinity, it appeared in R2 = 0.629, using the statutory water quality data and estimated alkalinity model, LR and alkalinity (Whole water treatment plants : 472) is estimated. Concentration of estimated alkalinity is 0.5 mg/L to 107.5 mg/L (average : 23.2 mg/L), and LR is 0.1 to 10 (average : 1.3). At tendency to corrosion of investigated LR, “No metal tendency” (>0.5) is 39 water treatment plants, 8.26 %, and “corrosion metal tendency” is 433 water treatment plants, 91.74%.

Although disinfection in drinking water treatment plants provides a safer water supply by inactivating pathogenic microorganisms, harmful disinfection by-products may be formed. In this study, the disinfectant, chlorine, was produced on-site from the electrolysis of salt (NaCl), and the by-products of the disinfection process, bromate and chlorate, were analyzed. The provisional guideline levels for bromate and chlorate in drinking water are 10 μg/L and 700 μg/L, in Korea, respectively. Bromide salt was detected at concentrations ranging from 6.0 ~ 622 mg/kg. Bromate and chlorate were detected at concentrations ranging from non-detect (ND) ~ 45.3mg/L and 40.5 ~ 1,202 mg/L, respectively. When comparing the bromide concentration in the salt to the bromate concentration in the chlorine produced by salt electrolysis, the correlation of bromide to bromate concentration was 0.870 (active chlorine concentration from on-site production: 0.6–0.8%, n=40). The correlation of bromate concentration in the chlorine produced to that in the treated water was 0.866.

Pelargonium zonate spot virus (PZSV)는 group IV (+) ssRNA viruses, Bromoviridae에 속하는 식물 병원체로, 일반적으로 토마토, 국화, 아티초크 및 제라늄에 감염된다. 본 연구는 검역 현장에서 PZSV를 신속하고 특이적으로 진단 할 수 있는 PCR module을 개발하는 것을 목적으로 하였다. PZSV를 검출하기 위한 RT-PCR 프라이머 선발 결과, 각각 513 및 320 bp를 증폭하는2개 조합을 선발하으며, 더욱 높은 검출감도로 검출할 수 있을 뿐아니라 RT-PCR을 검증할 수 있는 nested PCR 프라이머 조합을 개발하였다. 또한, 제한효소 Xho I 부위를 삽입한 유전자변형-양성대조구 플라스미드를 설계하여, PCR module에서 대조구로부터 오염을 검증할 수 있도록 개발하였다. 본 연구에서 개발한 PCR module은 토마토, 국화, 아티초크 및 제라늄 등에서 PZSV를 간편, 신속 및 특이적으로 검출하여, 지속적으로 식물검역에 활용할 수 있을 것으로 기대된다.