| UV/H2O2工艺降解微囊藻毒素-LR |
| 摘要点击 2226 全文点击 2269 投稿时间：2008-03-05 修订日期：2008-04-21 |
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| 中文关键词 UV/H2O2 微囊藻毒素-LR 降解 |
| 英文关键词 UV/H2O2 MC-LR degradation |
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| 中文摘要 |
| 采用UV/H2O2联合工艺，研究了光强、初始浓度、H2O2投加量、pH及阴离子对微囊藻毒素-LR (MC-LR)去除率的影响.结果表明，单独H2O2对MC-LR基本无去除效果；单独UV工艺可以一定程度上降解MC-LR；而UV/H2O2联合工艺由于发生协同作用明显提高降解效率.试验发现，随着光强的增大，MC-LR的去除率不断提高；随着MC-LR初始浓度的增大，其去除率不断降低；随着H2O2投加量的增大，降解速率常数逐渐增大，当H2O2投加量由1 mmol/L增大到3 mmol/L时，降解速率常数由0.084 4上升到0.166 4；当pH为3.13时，在相同条件下MC-LR的去除效果最好；阴离子的投加不利于MC-LR的降解，其中CO2-3、NO-3影响最大. |
| 英文摘要 |
| The degradation of MC-LR in water by UV/H2O2 process was investigated. The effects of intensity of UV radiation, initial concentration of MC-LR, dosages of H2O2, initial pH value and anions on degradation of MC-LR by UV/H2O2 process were studied. The results show that the removal of MC-LR only by H2O2 is nearly zero, and UV process can degrade MC-LR to a certain extent. However, the degradation efficiency of UV/H2O2 process is much higher than UV and H2O2 process due to the synergetic effect between UV and H2O2. The removal of MC-LR increases with the enhancement of intensity of UV radiation, but decreases gradually with the increase of initial concentration of MC-LR. When the dosages of H2O2 change from 1 mmol/L to 3 mmol/L, the constant of degradation rate rises from 0.084 4 to 0.166 4. The optimum pH value is 3.13. The added anions have adverse effect on the degradation of MC-LR, especially carbonate and nitrate ions have the biggest influence among the studied anions. |
