Norihiro Kobayashi, S. Takagi, Teruaki Kinoshita, Fumi Nakano, K. Furukawa, T. Kasuya, Shuhei Matsuhaba, Ikuo Teranaka, Tuyoshi Yamamoto, J. Yonekubo, Seiya Tanaka, Hiroyuki Niwa, Yuji Aita, Reika Takahara, Kaori Saito, Y. Ikarashi
1) Division of Environmental Chemistry, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan 2) Osaka Institute of Public Health, 1-3-69 Nakamichi, Higashinari-ku, Osaka 537-0025, Japan 3) Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku-ku, Tokyo 169-0073, Japan 4) Kanagawa Prefectural Institute of Public Health, 1-3-1 Shimomachiya, Chigasaki, Kanagawa 253-0087, Japan 5) Mie Prefecture Environmental Conservation Agency, 3258 Ueno, Kawage-cho, Tsu-shi, Mie 510-0304, Japan 6) Chiba Pharmaceutical Association, 1-12-11 Chuoko, Chuo-ku, Chiba-shi, Chiba 260-0024, Japan 7) Gifu Research Center for Public Health, 4-6 Akebono-cho, Gifu-shi, Gifu 500-8148, Japan 8) Saitama Prefectural Water Quality Management Center, 1632 Kobari, Gyoda City, Saitama 361-0024, Japan 9) Yonago City Waterworks Bureau, 1047-1 Fukuichi, Yonago, Tottori 683-0011, Japan 10) Nihon Waters K.K., 1-3-12 Kitashinagawa, Shinagawa-ku, Tokyo 140-0001, Japan 11) Agilent Technologies Japan, Ltd., 9-1 Takakura-cho, Hachioji-shi, Tokyo 192-8510, Japan 12) Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan 13) K.K. AB Sciex, Gotenyama Trust Tower 21/F, 4-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo 140-0001, Japan 14) GL Sciences Inc., 237-2 Sayamagahara, Iruma, Saitama 358-0032, Japan 15) Thermo Fisher Scientific K.K., 3-9 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa 221-0022, Japan
1)国立健康科学研究所环境化学研究室，日本神奈川川市川崎区钟町3-25-26，日本神奈川县2100 -9501;2)大阪公共卫生研究所，大阪东成区中道1-3-69，日本大阪537-0025;3)东京都公共卫生研究所，东京新宿区百国町3-24-1，日本东京169-0073;4)神奈川县公共卫生研究所，神奈川市下町町1-3-1，日本神奈川县253-0087;日本5)Mie县环境保护厅，3258上野，川崎町，津市，Mie 5100304;日本6)千叶县医药协会，1-12-11，中部，千叶市，千叶市，260-0024;日本7)岐阜市公共卫生研究中心，4-6，岐阜市，岐阜500-8148;日本8)埼玉县水质管理中心，日本361-0024;日本9)Yonago市自来水局，1047-1,Yonago, Fukuichi, Tottori, 683-0011;10)日本水公司，日本东京品川区北川1-3-12，日本东京140-0001;11)安捷科技日本有限公司，日本东京八良市高仓町9-1，日本东京192-8510;12)岛津公司，日本京都中古区东原町1号，日本京都604-8511;13)K.K. AB Sciex，日本御山信托大厦21楼，日本品川区北品川4-7-35，日本东京140-0001;14)GL科学公司，日本埼玉县入间市香原237-2，日本358-0032;15)赛默飞世尔科学公司，日本森谷町3-9;日本神奈川县横滨市神奈川区221-0022
{"title":"Development and Validation of a Simultaneous Analytical Method for Six Anions in Drinking Water by Liquid Chromatography/Mass Spectrometry (LC/MS)","authors":"Norihiro Kobayashi, S. Takagi, Teruaki Kinoshita, Fumi Nakano, K. Furukawa, T. Kasuya, Shuhei Matsuhaba, Ikuo Teranaka, Tuyoshi Yamamoto, J. Yonekubo, Seiya Tanaka, Hiroyuki Niwa, Yuji Aita, Reika Takahara, Kaori Saito, Y. Ikarashi","doi":"10.2965/jswe.45.51","DOIUrl":"https://doi.org/10.2965/jswe.45.51","url":null,"abstract":"1) Division of Environmental Chemistry, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan 2) Osaka Institute of Public Health, 1-3-69 Nakamichi, Higashinari-ku, Osaka 537-0025, Japan 3) Tokyo Metropolitan Institute of Public Health, 3-24-1 Hyakunincho, Shinjuku-ku, Tokyo 169-0073, Japan 4) Kanagawa Prefectural Institute of Public Health, 1-3-1 Shimomachiya, Chigasaki, Kanagawa 253-0087, Japan 5) Mie Prefecture Environmental Conservation Agency, 3258 Ueno, Kawage-cho, Tsu-shi, Mie 510-0304, Japan 6) Chiba Pharmaceutical Association, 1-12-11 Chuoko, Chuo-ku, Chiba-shi, Chiba 260-0024, Japan 7) Gifu Research Center for Public Health, 4-6 Akebono-cho, Gifu-shi, Gifu 500-8148, Japan 8) Saitama Prefectural Water Quality Management Center, 1632 Kobari, Gyoda City, Saitama 361-0024, Japan 9) Yonago City Waterworks Bureau, 1047-1 Fukuichi, Yonago, Tottori 683-0011, Japan 10) Nihon Waters K.K., 1-3-12 Kitashinagawa, Shinagawa-ku, Tokyo 140-0001, Japan 11) Agilent Technologies Japan, Ltd., 9-1 Takakura-cho, Hachioji-shi, Tokyo 192-8510, Japan 12) Shimadzu Corporation, 1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511, Japan 13) K.K. AB Sciex, Gotenyama Trust Tower 21/F, 4-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo 140-0001, Japan 14) GL Sciences Inc., 237-2 Sayamagahara, Iruma, Saitama 358-0032, Japan 15) Thermo Fisher Scientific K.K., 3-9 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa 221-0022, Japan","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87008088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Long Term Trends of Dissolved Oxygen in Bottom Layer on the Vertical Distribution of Water Quality in Tokyo Bay","authors":"Satoko Yokoyama, Akira Iimura","doi":"10.2965/jswe.45.239","DOIUrl":"https://doi.org/10.2965/jswe.45.239","url":null,"abstract":"","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79098832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
From field surveys of roof runoff conducted in general residential houses in the Lake Biwa basin, the pollution loads of buildings in an urban area were evaluated. The samples were collected from the total roof drainage during a rainfall event, and the water pollutants investigated were total organic carbon （ TOC ） , total nitrogen （ TN ） , and total phosphorus （ TP ） . As a result, it was estimated that 67.7% of the total precipitation flowed out as roof wastewater, and it was clarified that the proportion of dissolved components was high in all cases. The calculated loads of TOC, TN, and TP from buildings were 60.4, 18.1, and 0.64 g ha -1 day -1 , respectively. By applying these loads and roadway loads in the Lake Biwa basin, the basic unit pollution loads of TOC, TN, and TP in the urban area of the Lake Biwa basin were estimated to be 140, 24.2, and 1.1 g ha -1 day -1 , respectively.
通过对琵琶湖流域普通住宅屋顶径流的实地调查，评价了城区建筑物的污染负荷。样品采集于某次降雨过程中屋面总排水中，水污染物主要为总有机碳(TOC)、总氮(TN)和总磷(TP)。结果表明，总降水中有67.7%以顶板废水的形式流出，并且在所有情况下，溶解成分的比例都很高。建筑物TOC、TN和TP的计算负荷分别为60.4、18.1和0.64 g ha -1 day -1。在琵琶湖流域应用这些荷载和道路荷载，估算出琵琶湖流域城区TOC、TN和TP的基本单位污染荷载分别为140、24.2和1.1 g ha -1 day -1。
{"title":"Estimation of Basic Unit Pollution Load of an Urban Area in the Lake Biwa Basin","authors":"K. Wada, H. Tsuno, N. Takei","doi":"10.2965/jswe.45.21","DOIUrl":"https://doi.org/10.2965/jswe.45.21","url":null,"abstract":"From field surveys of roof runoff conducted in general residential houses in the Lake Biwa basin, the pollution loads of buildings in an urban area were evaluated. The samples were collected from the total roof drainage during a rainfall event, and the water pollutants investigated were total organic carbon （ TOC ） , total nitrogen （ TN ） , and total phosphorus （ TP ） . As a result, it was estimated that 67.7% of the total precipitation flowed out as roof wastewater, and it was clarified that the proportion of dissolved components was high in all cases. The calculated loads of TOC, TN, and TP from buildings were 60.4, 18.1, and 0.64 g ha -1 day -1 , respectively. By applying these loads and roadway loads in the Lake Biwa basin, the basic unit pollution loads of TOC, TN, and TP in the urban area of the Lake Biwa basin were estimated to be 140, 24.2, and 1.1 g ha -1 day -1 , respectively.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88649531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the Seto Inland Sea, oligotrophication due to the long-term reduction measures of nitrogen and phosphorus, which is evidenced by the discoloration of nori laver and a decrease in fishery production, is pointed out. In this study, we developed a fertilizer that can elute nutrients required for the growth of marine organisms. The main ingredient of this fertilizer is chicken manure, to which steel slag and hardener were added, followed by pressing to form a solid fertilizer. To establish the proper N/P/Fe elution ratio for the growth of microalgae, elution tests using 500 L flasks were carried out with fertilizer pieces of different ingredient mixed ratios. A long-term elution test was also performed using the actual size fertilizer (25 cm diameter and 23 cm height) in 100 L containers under flow-through seawater systems. Elution of nutrients continued for longer than 5 months. It is concluded that the fertilizer developed in this study is useful for enhancing the growth of marine organisms.
{"title":"Development of Marine Fertilizer Made from Ripened Chicken Manure Compost","authors":"Tomotaka Ueno, Tamiji Yamamoto, K. Fukuoka","doi":"10.2965/jswe.45.67","DOIUrl":"https://doi.org/10.2965/jswe.45.67","url":null,"abstract":"In the Seto Inland Sea, oligotrophication due to the long-term reduction measures of nitrogen and phosphorus, which is evidenced by the discoloration of nori laver and a decrease in fishery production, is pointed out. In this study, we developed a fertilizer that can elute nutrients required for the growth of marine organisms. The main ingredient of this fertilizer is chicken manure, to which steel slag and hardener were added, followed by pressing to form a solid fertilizer. To establish the proper N/P/Fe elution ratio for the growth of microalgae, elution tests using 500 L flasks were carried out with fertilizer pieces of different ingredient mixed ratios. A long-term elution test was also performed using the actual size fertilizer (25 cm diameter and 23 cm height) in 100 L containers under flow-through seawater systems. Elution of nutrients continued for longer than 5 months. It is concluded that the fertilizer developed in this study is useful for enhancing the growth of marine organisms.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85426786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The antibiotic-resistant ratios of Escherichia coli taken from rivers in Kanagawa prefecture were investigated to clarify their changes since the early 2000s. A considerable number of isolates taken from urbanized rivers carried resistance to cefotaxime, indicating human-related sources such as combined sewer overflows and companion animals. On the other hand, some of the isolates from rivers in the suburbs carried simultaneous resistances to tetracycline and to sulfamethoxazole, which were associated with livestock farming. A comparison of resistant ratios in 2019 with those in the early 2000s shows a significant decrease in the resistance associated with livestock farming and an increase in the resistance to levofloxacin and to gentamicin, although this increase was not statistically significant.
{"title":"A Case Study for the Change in Antibiotic-Resistant Ratios of Escherichia coli Taken from Rivers in the Suburbs","authors":"T. Urase, Yuito Kawano, Mio Sato","doi":"10.2965/jswe.45.83","DOIUrl":"https://doi.org/10.2965/jswe.45.83","url":null,"abstract":"The antibiotic-resistant ratios of Escherichia coli taken from rivers in Kanagawa prefecture were investigated to clarify their changes since the early 2000s. A considerable number of isolates taken from urbanized rivers carried resistance to cefotaxime, indicating human-related sources such as combined sewer overflows and companion animals. On the other hand, some of the isolates from rivers in the suburbs carried simultaneous resistances to tetracycline and to sulfamethoxazole, which were associated with livestock farming. A comparison of resistant ratios in 2019 with those in the early 2000s shows a significant decrease in the resistance associated with livestock farming and an increase in the resistance to levofloxacin and to gentamicin, although this increase was not statistically significant.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"154 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86295094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tamiji Yamamoto, Shunsuke Nakahara, T. Kuwabara, K. Nakamoto, Tadashi Saito, K. Hino
{"title":"Appropriate Construction Volume of Granulated Coal Ash for Suppression of Hydrogen Sulfide Generation from Dredged Pit in Lake Nakaumi","authors":"Tamiji Yamamoto, Shunsuke Nakahara, T. Kuwabara, K. Nakamoto, Tadashi Saito, K. Hino","doi":"10.2965/jswe.45.207","DOIUrl":"https://doi.org/10.2965/jswe.45.207","url":null,"abstract":"","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77110066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mifuyu Harada, Tasuma Suzuki, Y. Wada, Shigetoshi Ichimura
{"title":"Behavior of Biopolymers in Integrated Membrane System for Reclamation of Municipal Wastewater Effluent","authors":"Mifuyu Harada, Tasuma Suzuki, Y. Wada, Shigetoshi Ichimura","doi":"10.2965/jswe.45.159","DOIUrl":"https://doi.org/10.2965/jswe.45.159","url":null,"abstract":"","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89971380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Fujiwara, Kentaro Suzuki, Naoko Kimura, Motoharu Suzuki, M. Nakajima, K. Tadokoro, K. Abo
{"title":"Impact of Variation in Nutrient Concentration on Ecosystem, Biomass, and Production in a Semi-enclosed Embayment: Osaka Bay","authors":"T. Fujiwara, Kentaro Suzuki, Naoko Kimura, Motoharu Suzuki, M. Nakajima, K. Tadokoro, K. Abo","doi":"10.2965/jswe.45.145","DOIUrl":"https://doi.org/10.2965/jswe.45.145","url":null,"abstract":"","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82477506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Nitta, Riku Izumida, Runda Du, Yisong Hu, Y. Li
To apply the one-stage partial nitritation-anammox (PNA) process to municipal mainstream wastewater, an experiment on continuous nitrogen removal using hydroxyapatite crystallization and partial nitritation-anammox (HAP-PNA) granule was conducted at 25 °C using real sewage pretreated with anaerobic membrane bioreactors (AnMBR). In the sewage adaptation period, the ammonium concentration of the sewage was firstly adjusted to 150 mg-N L and then gradually decreased to 100 and then to 50 mg-N L. Finally, the real sewage treatment with the ammonium concentration of 33 mg-N L for long-term operation at HRT of 2 h. Results of the continuous feeding tests for the real sewage treatment, showed that a nitrogen removal efficiency of 87% was obtained at HRT of 2 h, and the rates of ammonium oxidation and nitrogen removal by anammox bacteria were 0.20 and 0.34 kg-N (m d), respectively. From the results of microbial analysis, the top two dominant species were the anammox bacteria and AOB, with relative abundances of 30.2% (Candidatus Kuenenia stuttgartiensis) and 13.6% (Nitrosomonas sp.), respectively. Therefore, it was shown that AOB and anammox bacteria involved in the PNA process could be maintained during the real sewage treatment. This is the first demonstration of the successful operation and stable high performance of the PNA process with HAP-PNA granule for treating mainstream sewage.
{"title":"Nitrogen Removal from Real Sewage Pretreated with Anaerobic Membrane Bioreactors Using One-Stage Partial Nitritation-Anammox Process with Hydroxyapatite Crystallization and Partial Nitritation-Anammox Granule","authors":"S. Nitta, Riku Izumida, Runda Du, Yisong Hu, Y. Li","doi":"10.2965/jswe.45.1","DOIUrl":"https://doi.org/10.2965/jswe.45.1","url":null,"abstract":"To apply the one-stage partial nitritation-anammox (PNA) process to municipal mainstream wastewater, an experiment on continuous nitrogen removal using hydroxyapatite crystallization and partial nitritation-anammox (HAP-PNA) granule was conducted at 25 °C using real sewage pretreated with anaerobic membrane bioreactors (AnMBR). In the sewage adaptation period, the ammonium concentration of the sewage was firstly adjusted to 150 mg-N L and then gradually decreased to 100 and then to 50 mg-N L. Finally, the real sewage treatment with the ammonium concentration of 33 mg-N L for long-term operation at HRT of 2 h. Results of the continuous feeding tests for the real sewage treatment, showed that a nitrogen removal efficiency of 87% was obtained at HRT of 2 h, and the rates of ammonium oxidation and nitrogen removal by anammox bacteria were 0.20 and 0.34 kg-N (m d), respectively. From the results of microbial analysis, the top two dominant species were the anammox bacteria and AOB, with relative abundances of 30.2% (Candidatus Kuenenia stuttgartiensis) and 13.6% (Nitrosomonas sp.), respectively. Therefore, it was shown that AOB and anammox bacteria involved in the PNA process could be maintained during the real sewage treatment. This is the first demonstration of the successful operation and stable high performance of the PNA process with HAP-PNA granule for treating mainstream sewage.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80046171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Mishima, Kenji Ozawa, S. Nakayama, Hiromi Kikuchi, Ayumi Namba, T. Kataoka, Y. Nihei
Research on plastic debris in the ocean and rivers is being vigorously conducted, but there is little research on the dynamics of plastic from the basin, which is one of the sources of plastic waste, to rivers and coasts. In this study, we conducted a field survey of basins （ roads ）, rivers, and coasts in the Hikichi River basin, Kanagawa Prefecture, with the aim of clarifying the dynamics of plastic pieces in the basin, river, and coast. From the results of the sample particle recovery test, the target size of the plastic piece in this study was set to be > 1 mm. The results indicated that the numerical and mass concentration of plastic pieces in the road dust between districts considered were significantly higher in the commercial and residential areas, respectively, mainly because of the difference in plastic piece size distribution. A comparison of plastic materials on roads, rivers, and coasts showed that polyethylene （ PE ）, polypropylene （ PP ）, and polystyrene （ PS ）, which have low specific gravity, were predominant in the river and materials washed up on the coast, but not significant in the road dust.
{"title":"Comparative Analysis of Plastic Pieces in Basin, River and Coast: Case Study in the Hikiji River Basin, Kanagawa Prefecture","authors":"S. Mishima, Kenji Ozawa, S. Nakayama, Hiromi Kikuchi, Ayumi Namba, T. Kataoka, Y. Nihei","doi":"10.2965/jswe.45.11","DOIUrl":"https://doi.org/10.2965/jswe.45.11","url":null,"abstract":"Research on plastic debris in the ocean and rivers is being vigorously conducted, but there is little research on the dynamics of plastic from the basin, which is one of the sources of plastic waste, to rivers and coasts. In this study, we conducted a field survey of basins （ roads ）, rivers, and coasts in the Hikichi River basin, Kanagawa Prefecture, with the aim of clarifying the dynamics of plastic pieces in the basin, river, and coast. From the results of the sample particle recovery test, the target size of the plastic piece in this study was set to be > 1 mm. The results indicated that the numerical and mass concentration of plastic pieces in the road dust between districts considered were significantly higher in the commercial and residential areas, respectively, mainly because of the difference in plastic piece size distribution. A comparison of plastic materials on roads, rivers, and coasts showed that polyethylene （ PE ）, polypropylene （ PP ）, and polystyrene （ PS ）, which have low specific gravity, were predominant in the river and materials washed up on the coast, but not significant in the road dust.","PeriodicalId":16300,"journal":{"name":"Journal of Japan Society on Water Environment","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80075068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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