植物收割对人工湿地去除多环芳烃的影响  

Effects of plants harvesting on polycyclic aromatic hydrocarbons removal of constructed wetland

作　　者：杨海燕[1] 郭金鹏[1,2] 卢少勇[1,2] 毕斌[2] 曹凤梅[2] 贾九敏 

机构地区：[1]北京建筑大学环境与能源工程学院,北京100044 [2]中国环境科学研究院,环境基准与风险评估国家重点实验室,国家环境保护湖泊污染控制重点实验室,湖泊环境研究中心,国家环境保护洞庭湖科学观测研究站,湖泊工程技术中心,北京100012

出　　处：《中国环境科学》2016年第5期1554-1560,共7页China Environmental Science

基　　金：环境基准与风险评估国家重点实验室自由探索课题(2014-GOT-042-N-18);中央级公益性科研院所基本科研业务专项(2012-YSKY-14);科技基础性工作专项(2015FY110900)

摘　　要：人工模拟北京市清河水质,研究模拟人工湿地中植物收割对PAHs去除效果的影响.结果显示：植物和填料对PAHs的去除均有一定的贡献率.湿地种植芦竹并添加填料后对2环萘、3环菲、4环芘和5环苯并[a]芘的去除率平均提高了34.82%、47.92%、19.70%和7.78%.湿地植物收割后,对萘、菲、芘和苯并[a]芘的平均去除率分别提高了11.31%、10.42%、21.21%和12.22%,且在收割后第2周期达到最大.植物收割后,第1周期的相对生长率最低（0.03～0.04cm/d）,第2周期的相对生长率最高（0.47～0.51cm/d）,第4周期的相对生长率恢复正常水平（0.17～0.23cm/d）;对PAHs的去除率在第4周期恢复正常水平.Effects of plants harvesting on PAHs removal rate of constructed wetland were studied by simulating the water quality of Qinghe river in Beijing.Plant and substrate on PAHs removal both have certain contribution.In the wetland planted and added substrate,the removal rate of naphthalene（2rings）,phenanthrene（3rings）,pyrene（4rings） and benzo [a] pyrene（5rings） increased by 34.82%,47.92%,19.70% and 47.92% on average.After harvesting of wetland plants,naphthalene,phenanthrene,pyrene and benzo [a] pyrene removal increased 11.31%,10.42%,21.21%,and 12.22%,respectively,and the maximum of the second cycle was achieved.After the plant harvested,the relative growth rate of first cycles was lowest（0.03～0.04cm/day）,the relative growth rate of second cycles was the highest（0.47～0.51cm/day）,the relative growth rate of the fourth cycle returned to normal levels（0.17～0.23cm/day）;and the removal rate of PAHs in the fourth cycle returned to normal levels.

关 键 词：人工湿地 多环芳烃 植物收割 填料 

分 类 号：X522[环境科学与工程—环境工程]