| 络合剂对燃煤及木材飞灰生物氧化能力的影响 |
| 摘要点击 1446 全文点击 1629 投稿时间：1998-11-18 |
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| 中文关键词 燃煤飞灰 燃木飞灰 络合剂 活性氧 脱氧核糖氧化法 |
| 英文关键词 coal combustion fly ash wood combustion fly ash chelator reactive oxygen species deoxyribose assay |
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| 中文摘要 |
| 利用脱氧核糖氧化法考察了飞灰颗粒物,包括5种燃煤飞灰及一种燃木飞灰,生物氧化能力以及外加螯合剂的影响。结果证实,不同来源飞灰颗粒物氧化剂产生能力不同,且燃煤飞灰产生方式不同,催化氧化剂产生能力亦不同。外加络合剂的存在对颗粒物氧化能力影响很大,其中二乙三胺五乙酸(DTPA)对氧化剂的产生有抑制作用,胺三乙酸(NTA)对所有颗粒物氧化剂产生均有促进作用,CIT(柠檬酸)的存在降低了脱氧核糖的氧化值,EDTA(乙二胺四乙酸)对不同类型飞灰影响不同,对燃煤飞灰氧化能力有抑制作用,相反,对燃木材飞灰颗粒物具有促进作用。 |
| 英文摘要 |
| By means of deoxyribose oxidation assay the capability of the biological oxidation generated by fly ashes,including five coalfired fly ashes and one wood combustion fly ash,as well as effects of external chelators such as diethylenetriaminepentacetic acid (DTPA),nitrolotriacetate (NTA),ethylenediamine tetraacetic acid (EDTA) and citric acid (CIT),have been studied.It was confirmed that the capability to generate oxidant from different sources of fly ashes is dissimilar,moreover coal fly ashes with various kinds of combustion have different catalysis effect for generation of oxidized products.The generations of oxidant by fly ashes are strongly dependent on properties of external chelators,DTPA inhibited generation of oxidant,and NTA promoted oxidation of deoxyribose by all fly ashes,but influence of EDTA on extents of oxidized products varied,ability to catalyze deoxyribose oxidation by coal combustion fly ash decreased,while that by wood combustion ehhanced.When CIT was added to the in vitro react ion mixture,chromogen formation was inhibited in a significant manner in comparison with that without adding of chelator. |
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