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Research paper−156−Synthesiology - English edition Vol.4 No.3 pp.156-161 (Jan. 2012) in Fig. 1. It is assumed that the wells that were found to have underground water pollution would be excluded from the Outline Survey, and therefore, in turn the number of wells for continuous monitoring in Fig. 2 is increasing.The wells that were found to be polluted in the Outline Survey becomes the subject of the Continuous Monitoring SurveyNote 2). Since the wells will be removed from the monitoring list if the pollution improves, the overall trend of pollution can be seen from the Continuous Monitoring Survey results. After the FY 2004, the number of wells with standard exceedance of “nitrate-nitrogen and nitrite-nitrogen” has been high and continues to increase (Fig. 2).1 Background of research: Current situation of the underground water pollution[1]The quality of underground water is published in the “Result of the Underground Water Quality Measurement” by the Ministry of the Environment. According to the Outline Survey for FY 2009Note 1), the percentage of wells that exceeded the environmental standard was about 6 %. By items, the environmental standard exceedance (3.8 %) of “nitrate-nitrogen and nitrite-nitrogen” was the highest. This was followed by arsenic (1.0 %), fluoride (0.5 %), lead (0.3 %), and boron (0.2 %). The top three items have not changed in ranking since the environmental standard items were added in 1999 (Fig. 1). Since 2003, there is a decrease tendency of “nitrate-nitrogen and nitrite-nitrogen” as seen - Specific material for selective nitrate adsorption-Underground water has been used as a suitable drinking water source for a long time. In recent years, however, not a small number of wells have become out of use as a drinking water source owing to pollution with nitrate or nitrite. A mobile water purification system has been developed with advantages in portability and cost to utilize the polluted wells in emergencies. The system has been achieved by the combination of nitrate ion selective adsorbent developed in our group and contactless supporting and shaping technology developed by a company which enables formation of a material into easy-to-handle shapes without decreasing the performance of the functional material. This paper mainly describes the development of the nitrate ion selective adsorbent material, which is the important elemental technology in the mobile water purification system.A novel technology for production of drinking water in emergencies Keywords : Nitrate ion, ion specific adsorbent, distributed without any contact, drinking water, water purification[Translation from Synthesiology, Vol.4, No.3, p.151-156 (2011)]Akinari SonodaHealth Research Institute, AIST 2217-14 Hayashi-cho, Takamatsu 761-0395, Japan E-mail : Original manuscript received March 31, 2011, Revisions received August 15, 2011, Accepted August 23, 2011 Fig. 1 Transition of the exceedance of environmental standard in the Groundwater Outline Survey (major items)Fig. 2 Transition of the number of wells exceeding the environmental standard in Groundwater Continuous Monitoring Survey (major items)FY of surveyNitrate, nitriteArsenicLeadTetrachloroethyleneArsenicTrichloroethyleneNitrate-nitrogen, nitrite-nitrogenFluorideExceedance(%)0123456720092007200520032001199919971995199319911989FY of surveyNitrate, nitriteTetrachloroethyleneTetrachloroethyleneArsenicTrichloroethyleneNitrate-nitrogen, nitrite-nitrogenFluoride0100200300400500600700800900Number of wells exceeding the environmental standard20092007200520032001199919971995199319911989

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