{"created":"2023-06-19T07:01:53.340754+00:00","id":3778,"links":{},"metadata":{"_buckets":{"deposit":"1bc72f59-1d31-443a-a4fd-df55aaa3d16f"},"_deposit":{"created_by":3,"id":"3778","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"3778"},"status":"published"},"_oai":{"id":"oai:rakuno.repo.nii.ac.jp:00003778","sets":["37:38:39"]},"author_link":["9885"],"item_3_biblio_info_9":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"45","bibliographicPageStart":"1","bibliographic_titles":[{}]}]},"item_3_date_granted_67":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2012"}]},"item_3_degree_grantor_65":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"酪農学園大学"}]}]},"item_3_degree_name_64":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"酪農学"}]},"item_3_description_43":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"subitem_description":"Thesis","subitem_description_type":"Other"}]},"item_3_description_6":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The present study focuses on the assessment of heavy metals (Zn, Cu, Fe, Pb, Cd, Ni and Mn) present in the sediment of Seta-Toyohira River. The sediments were analyzed for total metal content and various chemically bound fractions such as exchangeable, carbonate bound, Fe-Mn oxides, organic matters and residuals for each particle size. Total Zn content of sediments was found higher than the average values reported from Japanese rivers. The extent of sediment contamination was assessed using the enrichment factor (EF) using the metal content in the Ishikari Bay sediment as a background. The EF values for Cu and Zn were frequently over 2, while those for Ni were found to be 1. These results show that enrichment of Cu and Zn is from effluents released due to industrial activities and urbanization around the Seta-Toyohira River. The sequential extraction showed that the ratio of Zn was high (10-30%) in the first two weakly bound fractions of exchangeable and carbonate bound than the other metals, which are high in residual and Fe-Mn oxides bound fractions. Furthermore, the strong positive correlations between the ignition loss and organic bound fractions for Zn was observed, suggesting that these is a potential of Zn leaching from the sediments during biological degradation of organic matters. As a result, it is essential to control the discharge and expansion of Zn for the management of water environment of the Seta-Toyohira River from a view point of dissolution and flowability of Zn in the sediment.","subitem_description_type":"Abstract"}]},"item_3_version_type_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"西山, 嵩人"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-09-19"}],"displaytype":"detail","filename":"Nishiyama_syuuron.pdf","filesize":[{"value":"1.1 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Nishiyama_syuuron.pdf","url":"https://rakuno.repo.nii.ac.jp/record/3778/files/Nishiyama_syuuron.pdf"},"version_id":"b2af21c6-fc9b-4764-9d79-d0d8cb1b311e"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"thesis","resourceuri":"http://purl.org/coar/resource_type/c_46ec"}]},"item_title":"粒径分布と存在形態分析による世田豊平川底質中重金属の流動性と溶出特性の評価","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"粒径分布と存在形態分析による世田豊平川底質中重金属の流動性と溶出特性の評価"}]},"item_type_id":"3","owner":"3","path":["39"],"pubdate":{"attribute_name":"公開日","attribute_value":"2013-07-17"},"publish_date":"2013-07-17","publish_status":"0","recid":"3778","relation_version_is_last":true,"title":["粒径分布と存在形態分析による世田豊平川底質中重金属の流動性と溶出特性の評価"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2023-06-19T08:33:03.597704+00:00"}