文章摘要
刘岩.十二烷基苯磺酸钠的超声降解研究[J].,1999,18(2):35-37
十二烷基苯磺酸钠的超声降解研究
The degradation of DBS by sonochemstry
  
中文摘要:
      采用频率为1.8MHz,声强近似为5W·cm~-2的超声波,在固定式声化学的应器内研究了初始浓度为200mg/L-400mg/L的十二烷基苯磺酸钠(DBS)溶液的声化学降解情况.实验表明,浓度的改变对TOC的削减率无明显的影响,溶液的PH值对降解率则有显著影响,碱性条件下(PH=13),DBS几乎无降解,酸性条件下(PH=3)TOC削减率≤10%.通过分析降解过程中溶液的紫外光谱(190-340nm),发现降解过程中有复杂的中间产物生成,包括小分子烃类碎片及硝基化合物。我们认为,能使溶液表面张力。降低的表面活性剂,其声化学降解率低的原因在于,溶液表面张力下降后影响了溶液中空化效应的产生,从而降低了溶液中声化学反应的强度,致使TOC削减率不高。
英文摘要:
      Ultrasonic waves of frequency 1.8MHz, intensity of rougrly 5W.cm-2 were used to treat DBS solution of concentration ranging 0.2-4.0/Lin a sono-chemical reactor. The experimental results show that changes of concentration of DBS haveno influence on TOC removal rate. In basic solution(PH=13), no degradation appears, while in acidc: solution(pH=3), the TOC removal rate reaches upto 10%. The intermediate products were analysed by using ultraviolet spectrum scanned in the 190-320nm range, and were found to include piecesof broken chain of hydrocarbon and nitric benzene. The degradation mechanism were also analysed. we believe that the surface active regents in solution could reduce the sarface tension of the concerned liquid and thus weaken the generatien of cavitation in the solution to cause the low removal rate of TOC.
DOI:10.11684/j.issn.1000-310X.1999.02.009
中文关键词: 空化效应  声化学  DBS  TOC值  降解率
英文关键词: Cavitation  Sonochemisty  DBS solution  TOC value  Degradation rate
基金项目:环境模拟与污染控制国家重点联合实验室资助项目
作者单位
刘岩 青海大学化工研究所!西宁810016 
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