作 者：
胡茂俊;刘新红;高岩;易能;张振华;张力;王栋;严少华
单 位：
江苏省农业科学院农业资源与环境研究所;国家重点实验室培育基地江苏省食品质量安全重点实验室;南京农业大学资源与环境学院;无锡中科活力生物技术有限公司
关键词：
微生物-植物联合修复;城市河流;N2O;N2;O2;释放
摘 要：
针对城市河道污染水体治理这一问题,采用自主研发的自然水体原位收集装置对微生物和微生物-植物联合修复过程中气体N_2O、N_2及O2释放的特征进行野外原位监测。结果表明:微生物菌剂和微生物-植物联合净化期间水体氧化亚氮(N_2O)释放速率均值分别为10.68、5.91μmol·m~(-2)·h~(-1),与对照比,降幅分别为16.37%和53.86%;氮气(N_2)释放速率均值分别为1.49、0.87 mmol·m~(-2)·h~(-1),降幅分别为5.70%和67.54%;氧气(O_2)释放速率均值分别为1.14、0.69 mmol·m~(-2)·h~(-1),降幅分别为14.93%和72.06%;微生物菌剂及微生物-植物联合净化期间,目测水体透明度转好,藻类含量降低,水体溶氧由超饱和状态(17.17 mg·L~(-1))降至正常水体溶氧水平(9.49 mg·L~(-1)),降幅达到50%,可能是水体氧气释放速率降低的原因。因此,微生物-植物联合净化能显著降低水体N_2O、N_2及O_2的释放速率,推测是由于微生物和水生植物对水体养分的同化作用产生营养竞争,抑制了微生物反硝化作用产生N_2O、N_2并抑制藻类生长产生O_2及增加水体溶氧的原因。
译 名：
Effect of Microorganism-plant Joint Remediation on N_2O,N_2 and O_2 Release Flux from Polluted Waters in Urban River
作 者：
HU Mao-jun;LIU Xin-hong;GAO Yan;YI Neng;ZHANG Zhen-hua;ZHANG Li;WANG Dong;YAN Shao-hua;College of Resources and Environment Sciences,Nanjing Agriculture University;Institute of Agricultural Resources and Environment,Jiangsu Academy of Agricultural Sciences;Key Lab of Food Quality and Safety of Jiangsu Province,State Key Laboratory Breeding Base;Wuxi Zhongke Huoli Bio-technology Co Ltd;
关键词：
microorganism-plant joint remediation;;urban river;;N2O;;N2;;O2;;release flux
摘 要：
Considering the remediation of polluted water in urban area, this study investigated the effect of microbial agent(MAP) and aquatic plant combined purification method(MAAPP)on N_2O, N_2 and O_2 releasing characteristics from the water system, using a gas trapping device.The results showed the average N_2O releasing flux during MAP and MAAPP period was 10.68 μmol·m~(-2)·h~(-1) and 5.91 μmol·m~(-2)·h~(-1),respectively, and decreased by 16.37% and 53.86% in contrast to the control pond. The average N_2 releasing flux during the MAP and MAAPP period was 1.49 mmol·m~(-2)·h~(-1)and 0.87 mmol·m~(-2)·h~(-1), and decreased by 5.70% and 67.54% in contrast to the control pond,respectively. The average O_2 releasing flux during MAP and MAAPP period was 1.14 mmol·m~(-2)·h~(-1)and 0.69 mmol·m~(-2)·h~(-1) and decreased by14.93% and 72.06% in contrast to the control pond, respectively. During MAP and MAAPP period, water transparency was improved and over-saturation dissolved oxygen(17.17 mg·L~(-1))was significantly reduced to nearly normal level(9.49 mg·L~(-1)), with 50% decreasing rate.The results indicated that both MAP and MAAPP method could reduce N_2O, N_2 and O_2 releasing flux from water system. The microbial agent and aquatic plant absorbed the water nutrients and competed with denitrifying bacteria and phytoplankton, inhibited of N_2O, N_2 and O_2 producing and releasing from the polluted water.
