Isotope Chemistry for the Studies on COS・DMS Generating Mechanism and Their Behavior in Environment
同位素化学研究 COS・DMS 生成机制及其在环境中的行为
基本信息
- 批准号:12680531
- 负责人:
- 金额:$ 2.3万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2000
- 资助国家:日本
- 起止时间:2000 至 2002
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Carbonyl sulfide(COS) is produced by microbes such as Thiobacilius thioparus under the presence of thiocyanates in soil. On the other hand dimethly sulfide(DMS) is produced in the sea by algae and the sulfur in the compound comes from the sea water sulfate. In both cases microbes use inorganic sulfur to generate COS and DMS. Why they don't use organic sulfur? To elucidate this problem the experimental generation of COS and DMS were examined by adding organic sulfur compounds in the medium. In the case of cultivating Thiobacillus thioparus by adding aryl isothianate as organic sulfur, microbes did not breed. For DMS it took long times to find algae which breed effectively in the laboratory. Cricosphaera roscoffensis NIES 8 and Alexandrium catenella NIES 677 were recognized to generate DMS in the sea water medium experimentally.The predominant means to identify the origin of sulfur in the compounds is isotopic (^<32>S/^<34>S) measurement. For the isotopic measurement the collection method of COS and DMS were investigated. COS was introduced in ethane, added by Zn(CH_3COO)_2 to form ZnS which is converted to Ag_2S. DMS was adsorbed on silica gel with titanium oxide photo catalyst which is then irradiated by ultraviolet ray(350〜380nm). The formed SO_2 is introduced to hydrogen peroxide solution to be oxidized to SO_4^<-2> which is finally converted to Ag_2S. The sulfur isotopic measurement is carried out for SO_2 formed from Ag_2S described above. For COS isotopic fractionation by microbe metabolism was observed. δ^<34>S value (6.1‰) of thiocyanate sulfur as a standing material went to be lower as 3.8‰. This result is expected to be useful for the discussion of behavior of environmental sulfur.
羰基硫(COS)是由土壤中的微生物如排硫硫杆菌在硫氰酸盐存在下产生的。另一方面,二甲基硫化物(DMS)是由海洋中的藻类产生的,化合物中的硫来自海水硫酸盐。在这两种情况下,微生物使用无机硫来产生COS和DMS。为什么不用有机硫?为了阐明这个问题,通过在培养基中加入有机硫化合物来检查COS和DMS的实验生成。在通过添加芳基异硫醚作为有机硫来培养排硫硫杆菌的情况下,微生物没有繁殖。DMS花了很长时间才找到在实验室中有效繁殖的藻类。实验证实Cricosphaera roscoffensis NIES 8和Alexandrum catenella NIES 677在海水介质中能产生DMS,同位素(^ S/^ S)测定是鉴定硫来源的主要方法<32><34>。对于同位素测量,研究了COS和DMS的收集方法。COS被引入到乙烷中,加入Zn(CH_3COO)_2生成ZnS,ZnS转化为Ag_2S。以二氧化钛为光催化剂,硅胶为载体,吸附DMS,紫外光(350 ~ 380 nm)照射,得到DMS的光催化活性。将生成的SO_2通入双氧水中氧化为SO_4 ~(2-)<-2>,最后转化为Ag_2S。对上述Ag_2S生成的SO_2进行了硫同位素测定。微生物代谢对COS同位素分馏有一定影响。作为<34>固定物质的硫氰化物硫的δ^ S值(6.1‰)较低,为3.8‰。这一结果对探讨硫在环境中的行为具有一定的参考价值。
项目成果
期刊论文数量(16)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Y.Arikawa: "Fundamental Education in Analytical Chemistry"Anal.Sci.. 17. 571-573 (2001)
Y.Arikawa:“分析化学基础教育”Anal.Sci.. 17. 571-573 (2001)
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- 影响因子:0
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Y.Arikawa: "Development of Analytical Methods for XV and XVI Group Elements Application to Geochemistry and Environmental Chemistry"J.Jpn.Women's Univ.Fac.Sci.. 10. 25-41 (2002)
Y.Arikawa:“开发适用于地球化学和环境化学的 XV 和 XVI 族元素分析方法”J.Jpn.Womens Univ.Fac.Sci.. 10. 25-41 (2002)
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Y.Imaizumi et al.: "Capillary Electrophoresis of Thiols Derivatized with 5,5'-Dithiobis(2-nitrobenzoic acid)"Anal.Sci.. 17. 1325-1327 (2001)
Y.Imaizumi 等:“用 5,5-二硫代双(2-硝基苯甲酸)衍生的硫醇的毛细管电泳”Anal.Sci.. 17. 1325-1327 (2001)
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蟻川芳子 他: "二次イオン質量分析による鉛同位体(^<206>Pb,^<207>Pb,^<208>pb)組成の測定法の開発"日本女子大学紀要理学部. 9. (2001)
有川芳子等:“利用二次离子质谱法测定铅同位素(^<206>Pb、^<207>Pb、^<208>pb)组成的测定方法的开发”日本女子大学理学院通报。 9. (2001))
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ARIKAWA Yoshiko其他文献
ARIKAWA Yoshiko的其他文献
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{{ truncateString('ARIKAWA Yoshiko', 18)}}的其他基金
ISOTOPIC STUDIES ON COS AND DMS GENERATION AND THEIR BEHAVIOR IN THE ENVIRONMENTAL CYCLE OF SULFUR
COS和DMS生成及其在硫环境循环中的行为的同位素研究
- 批准号:
09680511 - 财政年份:1997
- 资助金额:
$ 2.3万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Behavior Analysis of Sulfur in Environment by Means of Isotopic Measurement
通过同位素测量分析环境中硫的行为
- 批准号:
07680565 - 财政年份:1995
- 资助金额:
$ 2.3万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Studies on the Discrimination of Sources of Sulfur in Air and their Behavior by Means of Isotopic Measurement of Biosulfur
生物硫同位素测量识别空气中硫源及其行为的研究
- 批准号:
05680453 - 财政年份:1993
- 资助金额:
$ 2.3万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)