{"created":"2023-07-27T06:25:20.474102+00:00","id":8598,"links":{},"metadata":{"_buckets":{"deposit":"dafc1b39-60dc-42ef-a8a5-ffb98f4e60cc"},"_deposit":{"created_by":3,"id":"8598","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"8598"},"status":"published"},"_oai":{"id":"oai:kanazawa-u.repo.nii.ac.jp:00008598","sets":["934:935:936"]},"author_link":["10806","12156","12154","12155"],"item_4_biblio_info_8":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1988-01-01","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"10","bibliographicPageEnd":"638","bibliographicPageStart":"631","bibliographicVolumeNumber":"11","bibliographic_titles":[{"bibliographic_title":"水質汚濁研究 = Japan journal of water pollution research"}]}]},"item_4_description_21":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"金属と錯化合物を作る有機酸が混入した重金属廃液が大学等の研究機関から排出されることがしばしばある。水酸化アルミニウムによる共沈プロルセスは重金属廃液の処理に有効であるが, 廃液に有機酸が混入すると処理効率が低下する。本研究では, このような重金属廃液処理効率の向上をはかるために, 廃液のpHを10から7にシフトした直後にアルミニウムを添加する共沈処理システムを提案した。実験では亜鉛溶液にシュウ酸, マロン酸, コハク酸, グルタル酸などのジカルボン酸を含む液をモデル廃液とした。亜鉛イオンはpH7では水溶性であるが, pH10付近では不溶性の水酸化物をつくる。この水酸化物はpHが7に変化したときに溶解するまえに水酸化アルミニウムフロックに取り込まれ, 不溶性のまま安定に存在した。この現象を利用して効率のよい処理が可能であった。本処理システムは, 比較的錯化能の強いシュウ酸が共存した廃液に対しても有効であった。 Heavy metal wastewater which is released from research, educational and medical facilities of universities often contains organic acids. The aluminum coagulation-sedimentation process is one of the usual methods to remove heavy metals from inorganic wastewater, however it is interfered by the coexistent organic acids. In order to improve the heavy metal removal efficiency, this paper proposes a method using the precipitation with aluminum hydroxide after a pH-shift from 10 to 7. In this study, zinc wastewater was examined as an example. Zinc ions are soluble at pH 7, but zinc forms an unsoluble hydroxide at pH 10. When the pH shifts from 10 to 7, the zinc hydroxide will be removed by the aluminum hydroxide before it reaches a dissolution equilibrium. When the treatments were applied to wastewater containing oxalic acid, malonic acid, succinic acid or glutaric acid, the oxalic acid interfered the zinc removal to a great extend in the case of conventional method. However, using the pH-shift method, wastewater containing oxalic acid could be effectively treated.","subitem_description_type":"Abstract"}]},"item_4_publisher_17":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"水環境学会 = Japan Society on Water Environment"}]},"item_4_relation_12":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.2965/jswe1978.11.631","subitem_relation_type_select":"DOI"}}]},"item_4_relation_28":{"attribute_name":"関連URI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://www.jstage.jst.go.jp/browse/jswe1978/-char/ja/","subitem_relation_type_select":"URI"}},{"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://www.jswe.or.jp/","subitem_relation_type_select":"URI"}}]},"item_4_rights_23":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"Copyright © Japan Society on Water Environment 水環境学会"}]},"item_4_source_id_11":{"attribute_name":"NCID","attribute_value_mlt":[{"subitem_source_identifier":"AN00124791","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0387-2025","subitem_source_identifier_type":"ISSN"}]},"item_4_version_type_25":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"平井, 英二"}],"nameIdentifiers":[{},{},{}]},{"creatorNames":[{"creatorName":"丁子, 哲治"}],"nameIdentifiers":[{},{},{}]},{"creatorNames":[{"creatorName":"東田, 明弘"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"林, 良茂"}],"nameIdentifiers":[{},{},{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-10-03"}],"displaytype":"detail","filename":"TE-PR-HIRAI-E-631.pdf","filesize":[{"value":"1.5 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"TE-PR-HIRAI-E-631.pdf","url":"https://kanazawa-u.repo.nii.ac.jp/record/8598/files/TE-PR-HIRAI-E-631.pdf"},"version_id":"60e1f950-7b78-4aba-b650-1d7119cd4ac6"}]},"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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"pHシフトによる有機酸・微量亜鉛混合系廃液のアルミニウム凝集処理","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"pHシフトによる有機酸・微量亜鉛混合系廃液のアルミニウム凝集処理"},{"subitem_title":"Treatment of heavy metal wastewater with organic acids by flocculation of aluminum hydroxide after a pH-shift","subitem_title_language":"en"}]},"item_type_id":"4","owner":"3","path":["936"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-10-03"},"publish_date":"2017-10-03","publish_status":"0","recid":"8598","relation_version_is_last":true,"title":["pHシフトによる有機酸・微量亜鉛混合系廃液のアルミニウム凝集処理"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2023-07-28T02:06:55.219158+00:00"}