| 烃基黄药捕收剂的生物降解性评价 |
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| 引用本文： | 陈绍华,龚文琪,梅光军,陈晓东,鄢恒珍.烃基黄药捕收剂的生物降解性评价[J].中南大学学报(自然科学版),2011,42(2). |
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| 作者姓名： | 陈绍华 龚文琪 梅光军 陈晓东 鄢恒珍 |
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| 作者单位： | 武汉理工大学资源与环境工程学院,湖北武汉,430070 |
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| 基金项目： | 国家高技术研究发展计划("863"计划)项目，武汉理工大学自主创新研究基金资助项目 |
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| 摘 要： | 借鉴表面活性剂等有机污染物的生物降解性评价体系,采用BOD5/CODCr法、静置烧瓶试验法和OECD-301B(ISO 9439)标准对烃基黄药的生物降解性进行评价,考察分子结构对生物降解度的影响,探讨烃基黄药的生物降解机理.研究结果表明:乙基、正丁基、正戊基、异丙基、异丁基黄药的BOD5与CODCr质量浓度之比即ρ(BOD5)/ρ(CODCr)均小于0.25,第28 d生物降解度分别为39.54%,36.88%,34.09%,29.17%和26.79%,生物降解指数分别为101.020 0,99.019 9,88.717 5,79.125 6和71.897 5,上述几种黄药对微生物的抑制时间分别为12,13,15,17和18 d.这3种评价方法得出的结论是一致的,即上述几种黄药基本上是难生物降解的,其生物降解能力由大至小依次为:乙基黄药、正丁基黄药、正戊基黄药、异丙基黄药和异丁基黄药;相对于碳链长度,分支度对黄药的生物降解性的影响更加显著,CS2,ROCSSH和单硫代碳酸盐是黄药生物降解的主要产物,同时,有少量油状液滴双黄药生成.
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| 关 键 词： | 烃基黄药 生物降解性 分子结构 机理 |
Evaluation of biodegradability of alkyl xanthates flotation collecters |
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| CHEN Shao-hua,GONG Wen-qi,MEI Guang-jun,CHEN Xiao-dong,YAN Heng-zhen.Evaluation of biodegradability of alkyl xanthates flotation collecters[J].Journal of Central South University:Science and Technology,2011,42(2). |
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| Authors: | CHEN Shao-hua GONG Wen-qi MEI Guang-jun CHEN Xiao-dong YAN Heng-zhen |
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| Institution: | CHEN Shao-hua,GONG Wen-qi,MEI Guang-jun,CHEN Xiao-dong,YAN Heng-zhen (School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China) |
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| Abstract: | The biodegradability of alkyl xanthates was evaluated by the methods of BOD5/CODCr,static-flasks test and OECD-301B(ISO 9439) according to the testing standard for biodegradability of surfactants and other organic compounds.Meanwhile,the influence of molecular structure on biodegradability was studied.Finally,the biodegradation mechanism of alkyl xanthates was preliminarily explored.The results show that the mass concentration rate of BOD5 and CODCr of ethyl xanthate,butyl xanthate,amyl xanthate,isopropyl x... |
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| Keywords: | alkyl xanthates biodegradability molecular structure mechanism |
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