| 梭鱼草净化黑臭河水的日变化试验研究 |
| 摘要点击 3261 全文点击 2809 投稿时间：2009-01-20 修订日期：2009-03-31 |
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| 中文关键词 梭鱼草 黑臭河水 水质改善 生理特性 日变化 |
| 英文关键词 Pontederia cordata malodorous black water water quality improvement physiological characteristics diurnal variations |
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| 中文摘要 |
| 测定了曝气和非曝气的2个植物净化槽在1 d中7个不同时间点的出水水质理化指标(pH、DO、COD、NH+4-N、TP)及植物叶片的叶绿素(Chla)、可溶性蛋白(SP)含量及过氧化物酶(POD)活性，另设空白槽为对照；试验目的是研究各指标的日变化情况及相互关系，为提高梭鱼草净化黑臭河水的处理效率及其植物净化槽的合理优化运行提供科学依据.结果表明，各水槽内所测指标的变化均在一定程度上与光强变化相关，对非曝气植物槽的分析发现，在出水理化指标中TP浓度与光强的相关性最好(r=0.93，p<0.01)，而在植物生理指标中SP含量与光强相关性最好(r=0.91，p<0.01)；植物处理使出水的DO日均值增加了0.13 mg/L，而曝气植物处理则使其增加了1.8 mg/L，曝气是对城市黑臭河水进行植物净化修复的必要辅助手段；曝气植物槽对黑臭河水中COD和NH+4-N的去除率日均值比植物槽升高了7.1%和6.3%(p<0.01)，TP去除率却相应下降了38%(p<0.01)；与非曝气槽植物相比，曝气槽植物体内Chla、SP日平均含量显著降低(p<0.05)而POD活性显著升高(p<0.05)；光强和曝气的变化能迅速而显著地影响梭鱼草的生理特性从而改善其净化槽出水水质，是构建和优化黑臭河水植物净化槽时值得考虑的重要调控因素. |
| 英文摘要 |
| Aquatic plants (Pontederia cordata) were soaked in two purifying-tanks to investigate the effects of illumination intensity and aeration on diurnal variations of Chla，SP，POD of Pontederia cordata and pH，DO，COD，NH+4-N，TP of water from purifying-tanks when treating the malodorous river water at seven different times，another blank purifying-tank was set as a control. Comparative studies and correlation analysis of these different indicators were carried out to improve the plants working efficiency and provide scientific basis for optimal operation of plant purifying-tanks. Results showed that all indicators affected by changes of light intensity，TP shows best correlation coefficient (r=0.93，p<0.01) of physicochemical indicators and SP behaves best correlation coefficient (r=0.91，p<0.01) of plant physiology indicators in non-aeration purifying-tank；aeration is necessary as diurnal average of DO shows an increase of 0.13 mg/L by treatment of plant meanwhile 1.8 mg/L by plant with aeration，purifying-tanks with aeration got 7.1%，6.3% higher removing rates of COD，NH+4-N and 38% less TP removing rate than non-aeration plant purifying-tanks (p<0.01)；with aeration treatment，significant reduction of Chla，SP content (p<0.05) and increase of POD activity (p<0.05) observed in plants；the changes of illumination intensity and aeration can significantly affect physiological characteristics of plants and should be considered carefully and need further study when treating malodorous river water by plant purifying-tanks. |
