沉水、挺水培养水生植物去除污水中氮磷的效果研究  

Study on Removal Efficiency of Nitrogen and Phosphorus from Sewage by Aquatic Macrophtes under Two Cultivation Modes

作　　者：张超兰[1] 陈秀娟 韦必帽[1] 李志刚[1] 刘帅[1] 李勤峰[1] 

机构地区：[1]广西大学农学院农业资源与环境科学系,广西南宁530005 [2]安徽南风环境工程技术有限公司,安徽合肥230001

出　　处：《西南农业学报》2009年第3期786-790,共5页Southwest China Journal of Agricultural Sciences

基　　金：广西科技攻关项目(桂科攻0816002-6);国家大学生创新性实验计划(GXDX200726);广西大学科研项目(CC160012)

摘　　要：通过在室内构建小型水生生态系统，研究了挺水和沉水培养模式下大水剑（Acorus Calamus）、太阳草（Tonina Fluviatilis）、水萝兰（Hygrophila difformis）3种水生植物体内氮磷含量及去除生活污水中氮磷的能力。结果表明，3种水生植物地上部和地下部氮累积量分别在68．43—279．31mg和23．44～170．13mg之间；地上部和地下部磷累积量分别在9．11—42．79mg和10．81～28．71mg之间。其中水萝兰体内氮磷累积总量最高，其次是太阳草，最低的是大水剑；挺水培养方式下氮磷积累量较沉水培养的高，但无显著差异。3种水生植物对污水中的氮、磷均有明显的去除效果，TN和TP的平均去除率分别在52．0％～72．4％和51．7％-77．1％之间。不同培养方式下不同水生植物去除污水中TN和TP的能力也有较大差异，从强到弱的顺序依次为：挺水培养太阳草〉挺水培养水萝兰〉沉水培养水萝兰〉挺水培养大水剑〉沉水培养大水剑。Based on the laboratory building the small aquatic ecosystem,removal efficiency of total nitrogen（TN） and total phosphorus（TP） by Aeorus Calamus, Tonina Fluziatilis and Hygrophila difformis with submerged and emerged cultivation was researched. The results showed that the content of TN was 68.43 - 279.31 and 23.44 - 170.13 mg in shoots and in roots, respectively. The content of TP was 9.11 - 42.79 mg and 10.81 - 28.71 mg in shoots and in roots, respectively. The highest content of TN and TP was in Hygrophila difformis, and then Tonina Fluviafilis,the lowest in Acorus Calamus. And the content of TN and TP was higher by emerged than by submerged treatment,but it was not signitlcated different at the same spiece aquatics plant. Compared with control,the removal efficiency of TN and TP were significated different with hydrophytes. The average removal rate to TN and TP was 52.0 % - 72.4 % and 51.7 % - 77.1% ,respectively. The comprehensive evaluation result indicated that, according to plant removal ability to TN and TP, the order was： Tonina Fluviatilis （emerged） 〉 Hygrophila difformis（ emerged ） 〉 Hygrophila difformis（ subemerged ） 〉 Acorus Calamus（emerged） 〉 Acorus Calamus（submerged） and Hygrophila difformis（emerged）.

关 键 词：水生植物 挺水 沉水 

分 类 号：X322[环境科学与工程—环境工程]