Pub Date : 2002-01-01DOI: 10.1246/NIKKASHI.2002.111
Y. Sano, Shigeo Kobayashi, T. Turu, M. Matsumoto, T. Nagaishi, S. Yoshinaga
The wet oxidation treatment of catechol and ethylenediamine was carried out. The combination of electrolysis with photocatalysis method was adopted, for these compounds can complexate easily as ligand with heavy metals and it is very difficult to treat complex compounds formed. TOC measurement showed that the waste water contained catechol only was oxidized by the combination method more efficiently than by electrolysis, photocatalysis or the combination method of electrolysis with photolysis. The same result was obtained for the waste water of cathecol contained copper or cadmium, and that of ethylenediamine contained copper. It was suggested for the acceleration effect that the combination of electrolysis with photocatalysis method could produce new active oxidizer and increase the oxidation rate to promote the decomposition of the organic compounds.
{"title":"Oxidation Treatment of Chelate Waste Water by Combined Electrolysis and Photocatalysis.","authors":"Y. Sano, Shigeo Kobayashi, T. Turu, M. Matsumoto, T. Nagaishi, S. Yoshinaga","doi":"10.1246/NIKKASHI.2002.111","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.111","url":null,"abstract":"The wet oxidation treatment of catechol and ethylenediamine was carried out. The combination of electrolysis with photocatalysis method was adopted, for these compounds can complexate easily as ligand with heavy metals and it is very difficult to treat complex compounds formed. TOC measurement showed that the waste water contained catechol only was oxidized by the combination method more efficiently than by electrolysis, photocatalysis or the combination method of electrolysis with photolysis. The same result was obtained for the waste water of cathecol contained copper or cadmium, and that of ethylenediamine contained copper. It was suggested for the acceleration effect that the combination of electrolysis with photocatalysis method could produce new active oxidizer and increase the oxidation rate to promote the decomposition of the organic compounds.","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"169 1","pages":"111-114"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74875617","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":"Biodegradation Mechanism of the Superfine Fibers-Cement Composite.","authors":"K. Shibano, S. Yoshizawa, Y. Ogawa","doi":"10.1246/NIKKASHI.2002.57","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.57","url":null,"abstract":"天然繊維であるセルロースとコラーゲンをミクロン以下の単位まで解繊した超微細化繊維をセメントと混合することにより超微細化繊維-セメント複合体を作製し，その生分解性を調べた．この超微細化繊維-セメント複合体を土壌中に埋設すると，数か月間程度で複合体は砂状に崩壊した．土壌中に埋設した供試体は，土壌に接している部分より細菌やかびにより生崩壊が進行した．DTA-TG法により埋設前後の供試体中のカルシウム成分の分布を分析した結果，カルシウム成分は，供試体の中心部分から外側へと移動していることがわかった．この生崩壊は，次の過程によって進行していることが示唆された ; (1)細菌の代謝に伴って発生する二酸化炭素が，遊離しているカルシウムイオンと反応し，炭酸カルシウムとなる．(2)土壌に面している部分の遊離カルシウムの濃度が低下し，次第に内部にあったカルシウムが外側へと移動する．超微細化繊維は，微生物により分解され最終的には，水と二酸化炭素となると推察した．","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"48 1","pages":"57-61"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84763481","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}
Pub Date : 2002-01-01DOI: 10.1246/NIKKASHI.2002.85
H. Kitami, Tetsuo Watanabe, T. Kitahara, J. Takano
{"title":"Determination of Phthalic Esters in Atmospheric Environment and Environmental Water by GC/MS with Disk-format Solid Phase Extraction Method.","authors":"H. Kitami, Tetsuo Watanabe, T. Kitahara, J. Takano","doi":"10.1246/NIKKASHI.2002.85","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.85","url":null,"abstract":"","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"16 1","pages":"85-91"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90770295","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}
Pub Date : 2002-01-01DOI: 10.1246/NIKKASHI.2002.265
S. Kudo, M. Sakata
In this study, we investigated the change in the removal rate of boric acid relative to the saturation rate (=dissolved amount/saturated amount) for gypsum in solution and its pH dependence, as well as the composition of the compounds found in the precipitate after the reaction. The results showed that almost 100% of boric acid in solution is removed by the addition of gypsum at a saturation rate of >0.75 in the pH range of 10.5–13, which is probably due to the increase of the amount of ettringite formed in the precipitate. This makes it possible to thoroughly process boric acid-containing wastewater using the same amount of coagulants as in the conventional method.
{"title":"Coagulation-sedimentation Method Using Aluminum Sulfate and Calcium Hydroxide for Removal of Boric Acid from Wastewater. Improvement of Removal Rate of Boric Acid by Addition of Gypsum into Wastewater.","authors":"S. Kudo, M. Sakata","doi":"10.1246/NIKKASHI.2002.265","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2002.265","url":null,"abstract":"In this study, we investigated the change in the removal rate of boric acid relative to the saturation rate (=dissolved amount/saturated amount) for gypsum in solution and its pH dependence, as well as the composition of the compounds found in the precipitate after the reaction. The results showed that almost 100% of boric acid in solution is removed by the addition of gypsum at a saturation rate of >0.75 in the pH range of 10.5–13, which is probably due to the increase of the amount of ettringite formed in the precipitate. This makes it possible to thoroughly process boric acid-containing wastewater using the same amount of coagulants as in the conventional method.","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"5 1","pages":"265-268"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86172271","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}
Pub Date : 2001-12-01DOI: 10.1246/NIKKASHI.2001.631
Toshiki Tsubota, Osamu Hirabayashi, S. Ida, S. Nagaoka, M. Nagata, Y. Matsumoto, K. Kusakabe, S. Morooka
{"title":"Hydrogen abstraction reaction of hydrogenated diamond surface in liquid phase by radical initiators used in polymer synthesis","authors":"Toshiki Tsubota, Osamu Hirabayashi, S. Ida, S. Nagaoka, M. Nagata, Y. Matsumoto, K. Kusakabe, S. Morooka","doi":"10.1246/NIKKASHI.2001.631","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2001.631","url":null,"abstract":"","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"60 1","pages":"631-636"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87158431","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}
Pub Date : 2001-11-10DOI: 10.1246/NIKKASHI.2001.649
Ahat Sali, 美文 赤間, 誠之 田中
Aqueous two-phase system formed by mixing (NH4)2SO4 and tetrabutylammonium bromide (TBAB) has been applied to the gentle separation of trisodium salt of copper (II) chlorophyllin (CuCL–Na). An aqueous two-phase system was obtained as follows: to a 3.0 mL of 1.0 mol/L TBAB aqueous solution, 1.0 mL of CuCL–Na aqueous solution containing less than 0.30 mg of CuCL–Na, 1.0 mL of pH 8 buffer solution and 1.1 g of (NH4)2SO4 were added and the mixture was shaken for 1 min, then left at room temperature for 3 h. A 0.5 mL portion of the top phase was diluted to 10 mL with water and its absorbance was then measured at 405 nm against a reagent blank similarly prepared. The CuCL–Na can be quantitatively extracted into the TBAB-rich upper phase at the wide pH range. It was considered that the extractable species was an ion pair complex of the type CuCL–TBA.
将(NH4)2SO4与四丁基溴化铵(TBAB)混合形成的双水相体系应用于铜(II)叶绿素(CuCL-Na)三钠盐的温和分离。水两相系统获得如下:3.0毫升1.0 mol / L TBAB水溶液,1.0毫升CuCL-Na包含小于0.30毫克的CuCL-Na水溶液,1.0毫升的pH值8缓冲溶液和1.1克(NH4) 2 so4添加和混合物动摇了1分钟,然后在室温下放置3 h。0.5毫升的高级阶段是稀释10毫升水和吸光度是然后以405海里对试剂空白同样的准备。CuCL-Na可以在较宽的pH范围内被定量地萃取到富含tabb的上相中。认为可提取物质为CuCL-TBA型离子对络合物。
{"title":"銅(II)クロロフィリン三ナトリウム塩の水性二相抽出","authors":"Ahat Sali, 美文 赤間, 誠之 田中","doi":"10.1246/NIKKASHI.2001.649","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2001.649","url":null,"abstract":"Aqueous two-phase system formed by mixing (NH4)2SO4 and tetrabutylammonium bromide (TBAB) has been applied to the gentle separation of trisodium salt of copper (II) chlorophyllin (CuCL–Na). An aqueous two-phase system was obtained as follows: to a 3.0 mL of 1.0 mol/L TBAB aqueous solution, 1.0 mL of CuCL–Na aqueous solution containing less than 0.30 mg of CuCL–Na, 1.0 mL of pH 8 buffer solution and 1.1 g of (NH4)2SO4 were added and the mixture was shaken for 1 min, then left at room temperature for 3 h. A 0.5 mL portion of the top phase was diluted to 10 mL with water and its absorbance was then measured at 405 nm against a reagent blank similarly prepared. The CuCL–Na can be quantitatively extracted into the TBAB-rich upper phase at the wide pH range. It was considered that the extractable species was an ion pair complex of the type CuCL–TBA.","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"9 1","pages":"649-652"},"PeriodicalIF":0.0,"publicationDate":"2001-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82747458","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":"Selective Formation of Phosphonium Ylide or Iminophosphorane by Electroreduction of Alkylaminophosphonium Salt.","authors":"K. Makita, K. Kuroyanagi, F. Ando, J. Koketsu","doi":"10.1246/NIKKASHI.2001.573","DOIUrl":"https://doi.org/10.1246/NIKKASHI.2001.573","url":null,"abstract":"簡便でかつアジドやリンのジハロ誘導体を用いることなく安全にイミノホスホランを合成する目的で，アルキルアミノホスホニウム塩の電解還元を行った．等モルの電気量を通電することにより一電子還元が起こり，α位の水素ラジカルが引き抜かれ，リンイリドおよびイミノホスホランが生成することを見いだした．この系にアルデヒドを共存させて得られる反応生成物を単離，同定した．アルキル置換基が電子供給基であるMe基ではイミノホスホランが定量的に得られた．一方，電子求引基を有するアルキル置換基の場合は，定量的にイリドのみを与えた．ベンジル基を有するホスホニウムイオンではWittig反応とAza-Wittig反応の両経路が進行し，相当する混合物を与えた．","PeriodicalId":19311,"journal":{"name":"Nippon Kagaku Kaishi","volume":"51 1","pages":"573-579"},"PeriodicalIF":0.0,"publicationDate":"2001-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78046620","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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