再生水灌溉对草坪释放挥发性有机物的影响

Effects of Reclaimed Water Irrigation on BVOCs Released from Urban Green Space Lawn grasses

为探讨城市绿地植物释放挥发物质对生态环境的影响,使用热脱附-气质联用(TDS-GC/MS)分析技术,对再生水及自来水灌溉条件下的3种北方城市绿化主要草种多年生黑麦草(Lolium perenne)、草地早熟禾(Poa pratensis)和高羊茅(Festuca arundinacea)所释放的挥发性有机物(BVOCs)进行测定,得到再生水和自来水2种不同水质灌溉条件下3种草坪草BVOCs的释放规律。结果表明:3种草坪草释放的挥发性有机物BVOCs主要为萜类、烷烃类、醛类、醇类、酯类、酸类和酮类7类,并且使用再生水灌溉与自来水灌溉相比,3种草坪草释放的BVOCs无明显差异。这表明,使用再生水灌溉城市绿地草坪不会对大气组分产生明显影响,再生水可作为城市绿地草坪生态用水的补充。

In order to investigate the effects of reclaimed water irrigation on the BVOCs of urban green space plants, the BVOCs of three turfgrasses （perennial ryegrass, Kentucky bluegrass and tall rescues） under reclaimed water irrigation and tap water irrigation were measured using closed sampling method and thermal desorption TDS-GC/MS analysis. The dynamic characteristics of the BVOCs released by the three turfgrasses were obtained. The results showed that the terpenes, alkanes, aldehydes, alcohols, esters, acids main BVOCs released by the three turfgrasses were and ketones, and there were no significant differ- ences between the two irrigation waters. These results prove that the turfgrass of urban green space irriga- ted by reclaimed water has no significant influence on air component, and reclaimed water can be used as supplementary of ecological water demand of urban turf.