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최근주(Keun Joo Choi),김상구(Sang Goo Kim),손희종(Hee Jong Son),류동춘(Dong Choon Ryu),류재익(Jae Ick Ryoo),손인식(In Sik Son) 한국물환경학회 2002 한국물환경학회지 Vol.18 No.1
Japan Environmental Agency announced 14 kinds of endocrine disruptors was detected on 130 watersheds of Japan in 1998 and the Ministry of Environment of Korea announced 13 kinds of endocrine disruptors involving Bisphenol-A was detected in domestic watersheds in 2000. According to the report, bisphenol-A, nonyiphenol and 4-n-heptylphenol were detected in all domestic watersheds. This study was carried out for finding removal method of 13 species of endocrine disruptors on water treatment processes. The concentrations of prepared endocrine disruptors standard water were about 10 ㎎/L and we analyzed the concentration of endocrine disruptors by W Absorbance. All 13 pieces of endocrine disruptors could be absorbed into the powder activated carbon(PAC) and the phthalates(DBP, DEP, DEHP) could be coagulated but other endocrine disruptors could not be coagulated by coagulant. Ozonation showed that it could not remove endocrine disruptors by measuring W Absorbance, but other researchers reported ozonation could transfered endocrine disruptors to isomer.
김상구(Sang Goo Kim),류동춘(Dong Choon Ryou),최근주(Keun Joo Choi),송미정(Mi Jeong Song),나영신(Young Shin Na),류재익(Jae Ick Ryoo),신판세(Pan Se Shin) 한국수처리학회 2000 한국수처리학회지 Vol.8 No.2
Generally the turbidity of surface water increased tens or hundreds times rapidly by degree of rainfall and intensity. High turbid water have problems with lower alkalinity and many fine particles smaller than 1.0㎛. High turbid water needs higher coagulant dose for removing the particles especially fine particles which have comparatively larger specific area. But lower alkalinity can not react sufficiently with added coagulant to form aluminium hydroxide for removing the fine particles. Therefore lime is supplied for increasing raw water alkalinity, it is necessity increasing coagulant for good coagulation after lime added. For increasing particle to particle collision chance, high velocity gradient and longer flocculation time is needed. Though higher velocity gradient can increasing collision chance, can not make large floc so lower velocity gradient needed for making large floc to the last flocculation stage. Proper arrangement of baffles or compartmentalizations in the flocculation basin can reduce short-circuiting and extend flocculation time. The around-the-end and over-and-under baffled channel are more effective to prolong detention time than diffuser wall.