| 四溴双酚A的辐照降解研究 |
| 摘要点击 3795 全文点击 2293 投稿时间：2011-07-08 修订日期：2011-11-14 |
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| 中文关键词 四溴双酚A 电子束辐照 吸收剂量 脱溴 降解 |
| 英文关键词 tetrabromobisphenol A(TBBPA) electron beam radiolysis absorbed dose debromination degradation |
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| 中文摘要 |
| 研究了甲醇-水溶液中四溴双酚A(TBBPA)的电子束辐照降解.通过测定辐照前后TBBPA的浓度变化来研究吸收剂量、初始浓度、pH、自由基清除剂对辐照降解效果的影响.结果表明,TBBPA在甲醇-水溶液的辐照降解是还原性逐步脱溴降解过程,自由电子在降解过程中起主导作用,降解反应遵循一级动力学方程.在辐照剂量为10 kGy时,20 mg·L-1的TBBPA有91.6%发生脱溴降解,当向辐照体系充入氮气并且加入叔丁醇,可将TBBPA的降解效率提高到100%,或者调节辐照体系溶液的pH值至12,TBBPA的降解效率也可以达到100%.辐照降解是处理TBBPA的一种有效手段. |
| 英文摘要 |
| The radiation degradation of tetrabromobisphenol A (TBBPA) in methanol aqueous solutions by electron beam was studied. The effects of absorbed dose, initial concentration of TBBPA, pH and different kinds of gas saturated solution on the degradation and debromination of TBBPA were investigated. The results showed that the degradation of TBBPA in methanol-water solution was the process of deoxidize debromination, and the radiolysis degradation of TBBPA followed the first-order dynamical equations. When the absorbed dose was 10 kGy, the degradation efficiency of 20 mg·L-1 TBBPA solution could reach to 91.6%. The degradation efficiency of TBBPA could increase to 100% in nitrogen saturated solution containing tert-butanol, or achieve 100% under adjusting the pH value to 12.Radiation degradation is an effective means of removing TBBPA. |
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