中水灌溉对城市绿地草坪VOCs的影响研究

采用封闭采样法和热脱附-气质联用分析技术,通过对中水及清水浇灌下的3种重要城市绿化草:黑麦草、早熟禾、高羊茅所释放的挥发性有机物(VOCs)测定研究,得到清水、中水灌溉下,3种典型城市绿化用草释放的VOCs的规律以及中水灌溉是否对植物生长存在潜在影响.结果表明,中水灌溉与清水灌溉下植物释放的主要VOCs均为萜类、烷烃类、醛类、醇类、酯类、酸类和酮类七类,且在排放量上并无明显差异.从而得到中水灌溉对植物VOCs的释放并无明显影响,用中水灌溉城市绿地是可行的.

RESEARCH OF EFFECTS ON VOCs OF URBAN GREEN SPACE WITH RECLAIMED WATER IRRIGATING

Adopts the closed sampling method and thermal desorption-GC-MS analysis,Through testing and researching the VOCs released by the three important urban green grass: ryegrass,Kentucky bluegrass and tall fescues,with reclaimed water and clean water irrigating,we can find out the discipline of the VOCs released by the three typical urban green grass and the potential impact on the growth of plant with reclaimed water irrigating.The result shows that,the main VOCs released by the plant under the irrigating of reclaimed water and clean water have the same categories,including the terpenes,the alkanes,the aldehydes,the alcohols,the esters,the acids and the ketones,and have no distinct difference in the discharge amount.Therefore,we can conclude that,it has little impact on the VOCs released by the plant with the reclaimed water irrigating,and it's feasible to irrigate the urban green space with the reclaimed water.