http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
서창동(Chang Dong Seo),손희종(Hee Jong Son),최진택(Jin Taek Choi),류동춘(Dong Choon Ryu),유평종(Pyung Jong Yoo) 大韓環境工學會 2015 대한환경공학회지 Vol.37 No.7
낙동강 수계에서의 유기인계 난연제류(OPFRs) 검출현황을 조사한 결과, 본류 및 지류 20지점 중 6지점에서 TCEP, TCPP 및 TBEP 3종이 검출되었으며, 본류에서는 고령에서만 TCPP가 ND~114.9 ng/L 및 TBEP가 ND~49.1 ng/L의 농도로 검출되었으며, 지류의 경우는 금호강 상류, 신천, 금호강 하류, 진천천 및 양산천에서 TCEP가 ND~1,865.3 ng/L, TCPP가 ND~519.2 ng/L 및 TBEP가 ND~210.4 ng/L의 농도로 검출되었다. 낙동강 주변에 위치한 11개 하수처리장 방류수들에서는 TBP, TCEP, TCPP 및 TBEP 4종이 각각 ND~458.5 ng/L, ND~2,932.7 ng/L, ND~1,320.7 ng/L 및 ND~655.2 ng/L의 농도로 검출되었다. 낙동강 수계 및 낙동강 주변에 위치한 11개 하수처리장 방류수들에서의 계절별 OPFRs 분포비율을 분석한 결과, 동일 지점에서도 채수시기에 따라 검출농도 뿐만 아니라 구성종 비율의 변화폭도 매우 크게 나타났다. This study was investigated occurrence and distribution patterns of organophosphorus flame retardants (OPFRs) in Nakdong River basin (mainstream, tributaries and sewage treatment plant (STP) effluents). 3 (TCEP, TCPP and TBEP) out of 9 OPFRs were detected in 6 out of 20 sampling sites (mainstream and tributaries), The TCPP and TBEP concentration levels in mainstream samples were ND~114.9 ng/L ng/L and ND~49.1 ng/L, respectively. And the TCEP, TCPP and TBEP concentration levels in tributary samples were ND~1,865.3 ng/L, ND~519.2 ng/L and ND~210.4 ng/L, respectively. 4 (TBP, TCEP, TCPP and TBEP) out of 9 OPFRs were detected in effluents of 11 STPs around the Nakdong River basin. The TBP, TCEP, TCPP and TBEP concentration levels in 11 STP effluents were ND~458.5 ng/L, ND~2,932.7 ng/L, ND~1,320.7 ng/L and ND~655.2 ng/L, respectively. According to the sampling season, change ranges of distribution patterns and detected concentrations of OPFRs were highly variable in the same sampling sites.
염훈식(Hoon-Sik Yoom),손희종(Hee-Jong Son),류동춘(Dong-Choon Ryu),유평종(Pyung-Jong Yoo) 大韓環境工學會 2017 대한환경공학회지 Vol.39 No.3
생물활성탄 공정과 안트라사이트를 여재로 사용한 biofilter에서 공탑 체류시간(EBCT)과 수온의 변화에 따른 8종의 고지혈증 치료제류(blood lipid regulator agents, BLLAs)의 생물분해 특성을 평가하였다. 수온 8℃, 16℃ 및 24℃에서 공탑 체류시간을 5분~15분까지 변화시켰다. 생물활성탄 공정에서 고지혈증 치료제류 8종의 생물분해 제거율은 공탑 체류시간과 수온의 변화에 많은 영향을 받았으며, 공탑 체류시간과 수온이 증가할수록 생분해 제거율이 증가하였다. 고지혈증 치료제류의 종류에 따른 생물활성탄 공정에서 생분해 제거율은 statin계의 경우 simvastatin이 가장 높았으며 다음으로 mevastatin, fluvastatin 및 atorvastatin 순이었다. 또한, Fibrate계 고지혈증 치료제들의 생물분해능은 fenofibrate가 가장 높았으며 다음으로 gemfibrozil, bezafibrate, clofibric acid순이었다. BAC 공정에서 생물분해 제거능이 가장 낮은 clofibric acid와 atorvastatin의 생물분해 속도 상수(Kbio)는 수온이 8℃에서 24℃로 상승하였을 경우, 각각 0.0075 min<SUP>-1</SUP>과 0.0122 min<SUP>-1</SUP>에서 0.0540 min<SUP>-1</SUP>과 0.0866 min<SUP>-1</SUP>으로 증가하여 각각 7.2배 및 7.1배 정도 증가하였다. In this study, We investigated the effects of water temperature and empty bed contact time (EBCT) on the biodegradability of 8 blood lipid lower agents (BLLAs) in biological activated carbon (BAC) process. Experiments were conducted at three water temperatures (8℃, 16℃ and 24℃) and three EBCTs (5 min, 10 min and 15 min). Increasing water temperature and EBCT increased the biodegradation efficiency of BLLAs in BAC process. Simvastatin and fenofibrate were the highest biodegradation efficiency, but atorvastatin and clofibric acid were the lowest. The kinetic analysis suggested a pseudo-first-order reaction model for biodegradation of 8 BLLAs at various water temperatures and EBCTs. The pseudo-first-order biodegradation rate constants (kbio) of clofibric acid and atorvastatin were 0.0075 min<SUP>-1</SUP> and 0.0122 min<SUP>-1</SUP> at 8℃, and were 0.0540 min<SUP>-1</SUP> and 0.0866 min<SUP>-1</SUP> at 24℃, respectively. By increasing the water temperature from 8℃ to 24℃, the biodegradation rate constants (kbio) were increased 7.1~7.2 times.
김상구 ( Sang Goo Kim ),손희종 ( Hee Jong Son ),정종문 ( Jong Moon Jung ),류동춘 ( Dong Choon Ryu ),유평종 ( Pyung Jong Yoo ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.9
This study carried out continuous column test for estimating the regeneration efficiency with regeneration times and temperatures. More times regenerated granular activated carbon (GAC) has more ash in the GAC and has less apparent density. Two times regenerated GAC (2nd re-GAC) could removed the Trihalomethanes (THMs) in the water for the first two week after starting continuous column test, on the other hand five times regenerated GAC (5th re-GAC) did not have adsorption capacity. The THMs concentration in the effluent was almost equal or higher than that of influent at the first time of continuous column test. 2nd re-GAC showed much more DOC adsorption capacity than 5th re-GAC and the GAC which was regenerated with 700 ℃ had highest DOC removal efficiency among the GACs with 600, 700, 800, 900 ℃ regeneration temperatures. It is anticipated the cost of GAC regeneration could be saved more 100 million won by reducing the furnace temperature of 3rd~4th and 5th~6th about 150 ℃ compared to the current regeneration condition.
김상구 ( Sang-goo Kim ),박현석 ( Hyun-seog Park ),손희종 ( Hee-jong Son ),이정규 ( Jeong-gyu Lee ),류동춘 ( Dong-choon Ryu ),유평종 ( Pyung-jong Yoo ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.7
The H water treatment plant has been operating since 1982 and has had no renovation. It is assumed that the filters have been operated for more than 30 years and therefore are deteriorated. Many of the filters show an unequal state of air scouring during backwashing. For this study one filter, which was presumed most deteriorated among eighteen filters, was selected as a model filter for renovation. Some of the effects seen after renovation of the underdrain system were a lower average filtrated turbidity by approximately 0.02 NTU and an equal backwash state throughout the filter bed. Sand wash efficiencies by backwash before renovation of the underdrain system were 28%, 8%, and 5% at the surface, 50 cm depth, and 100 cm depth, respectively, and after renovation of the underdrain system were 94%, 26%, and 15% , respectively. The standard deviation of the effective sand size was 0.025-0.033 mm before renovation of the underdrain system and 0.002-0.011 mm after renovation of the underdrain system, meanings there was equal backwash pressure throughout the filter. Filtration time after renovation was approximately 2 times longer than before renovation.