Cesium and strontium loads into a combined sewer system from rainwater runoff.
In this study, combined sewage samples were taken with time in several rain events and sanitary sewage samples were taken with time in dry weather to calculate Cs and Sr loads to sewers from rainwater runoff. Cs and Sr in rainwater were present as particulate forms at first flush and the particulate Cs and Sr were mainly bound with inorganic suspended solids such as clay minerals in combined sewage samples. In addition, multiple linear regression analysis showed Cs and Sr loads from rainwater runoff could be estimated by the total amount of rainfall and antecedent dry weather days. The variation of the Sr load from rainwater to sewers was more sensitive to total amount of rainfall and antecedent dry weather days than that of the Cs load.
Dept. of Science and Engineering, Iwate University, Ueda 4-3-5, Morioka, Iwate, 020-8551, Japan. Electronic address: naoki@iwate-u.ac.jp.
Nao
N
Kamei-Ishikawa
Dept. of Science and Engineering, Iwate University, Ueda 4-3-5, Morioka, Iwate, 020-8551, Japan.
Daiki
D
Yoshida
Department of Frontier Materials and Function Engineering, Graduate School of Engineering, Iwate University, Ueda 4-3-5, Morioka, Iwate, 020-8551, Japan.
Ayumi
A
Ito
Dept. of Science and Engineering, Iwate University, Ueda 4-3-5, Morioka, Iwate, 020-8551, Japan.
Teruyuki
T
Umita
D002586:Cesium / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods; D062406:Fukushima Nuclear Accident; D007564:Japan; D011834:Radiation Monitoring / Q000379:methods; D011891:Rain; D012044:Regression Analysis; D012722:Sewage / Q000032:analysis*; D013324:Strontium / Q000032:analysis*; D014875:Water Pollutants, Radioactive / Q000032:analysis*; D014887:Weather
D012722:Sewage; D014875:Water Pollutants, Radioactive; D002586:Cesium; D013324:Strontium
Cesium; Combined sewage system; Load; Rainwater runoff; Strontium