pH和曝气对水生植物去除富营养化水体中氮磷等物质的影响  

Effect of pH and Aeration on Removal for Nitrogen and Phosphorus in Eutrophic Water by Aquatic Plant

作　　者：胡绵好[1,2] 奥岩松[2] 朱建坤 杨肖娥[1] 

机构地区：[1]污染环境修复与生态健康教育部重点实验室,浙江大学环境与资源学院,浙江杭州310029 [2]上海交通大学农业与生物学院,上海201101 [3]绍兴市汤浦水库管理局,浙江绍兴312364

出　　处：《水土保持学报》2008年第4期168-173,共6页Journal of Soil and Water Conservation

基　　金：浙江生态省建设重大科技攻关项目(2005C13002)

摘　　要：利用植物浮床系统,通过室内静态模拟试验,研究了pH和曝气对水生植物净化富营养化水体影响。试验结果表明,不同pH处理6 d后,植物系统在pH8.9下对TN,CODMn,BOD5的去除效果最好,TP的去除效果在pH6.7下最好,Chla的去除效果在pH5.0下最好。然而,无植物系统中,TN,TP的去除效果在pH8.9下最好,BOD5的去除效果在pH6.7下最好,CODMn,Chla的去除效果在pH5.0下最好。有无植物系统中,曝气处理6 d后对TN影响很大,但去除率明显小于不曝气处理(P<0.001),除在豆瓣菜系统中,曝气还对CODMn去除产生一定的影响,但对TP和Chla的去除无影响。本试验结果还表明,植物修复系统和无植物系统中,不同pH处理下,水体中NH4-N,NO3-N,NO2-N的去除效果均在pH8.9处理下最好,且在pH8.9+曝气联合作用下水体中NH4-N,NO3-N,NO2-N的去除率也最高。Effect of pH and aeration for nitrogen and phosphorus in eutrophic water by aquatic plant on float- ing-beds was investigated in the greenhouse in this study. The present experiment was studies at different pH after 6 d treatment, removal efficiencies for TN, CODMo, and BODs were highest at pHS. 9, TP removal was highest at pH6.7, Chla removal was highest at pH5.0 in the planted system. However, removal efficiencies of TN and TP were highest at pHS. 9, BOD5 removal was better at pH6.7, removal for Chla and CODMn was highest at pH5.0 in the unplanted （control） system. TN removal was influenced significantly with aeration after 6 d treatment in the planted and unplanted system, and its removal with aeration treatment was much smaller than that with not-aeration （ P 〈0. 001）. CODM, removal was affected by aeration except for watercress system, but removal of TP and Chla was not impacted by aeration. The results showed that removal efficiencies of NH4-N, NO3-N, and NO2-N were highest at pH8. 9 and pHS. 9＋aeration.

关 键 词：富营养华水体 水生植物 曝气 PH 

分 类 号：X524[环境科学与工程—环境工程] X173