风车草对低污染水体氮磷的净化效能  

Purification effect of Cyperus alternifolius L.on low-polluted water

作　　者：张云潇 徐佳敏 卢少勇[2] 李锋民[1] 张亚茹 王永强 刘晓晖[2,4] ZHANG Yunxiao;XU Jiamin;LU Shaoyong;LI Fengmin;ZHANG Yaru;WANG Yongqiang;LIU Xiaohui(Institute of Coastal Environmental Pollution Control,College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China;National Engineering Laboratory for Lake Pollution Control and Ecological Restoration,State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu,Key Laboratory of Environmental Protection Agency for Lake Pollution Control,Institute of Lake Ecological Environment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;School of Environment,Harbin Institute of Technology,Harbin 150090,China;School of Environment,Tsinghua University,Beijing 100084,China)

机构地区：[1]中国海洋大学环境科学与工程学院,近海环境污染控制研究所,山东青岛266100 [2]湖泊水污染治理与生态修复技术国家工程实验室,国家环境保护洞庭湖科学观测研究站,国家环境保护湖泊污染控制重点实验室,湖泊生态环境研究所,中国环境科学研究院,北京100012 [3]哈尔滨工业大学环境学院,哈尔滨150090 [4]清华大学环境学院,北京100084

出　　处：《农业资源与环境学报》2021年第5期735-745,共11页Journal of Agricultural Resources and Environment

基　　金：国家重点研发计划项目(2018YFC0406304);科技基础性工作专项(2015FY110900)。

摘　　要：为探讨湿地水生植物对低污染水体中氮磷的去除效果,以挺水植物风车草为研究对象,研究其对低污染水中氮、磷削减的日变化规律,及温度对净化效果的影响,并探究了系统中溶解性有机物的变化。结果表明:风车草对低污染水的氮、磷去除过程符合一级动力学方程,常温下(24~30℃)对TN、TP去除的一阶反应速率常数分别为0.4493、0.5028,70 h后对TN、TP的去除率高达82.87%、72.40%,日变化率分别为48.52%、40.31%,而低温(4~8℃)下风车草对氮、磷的去除效果明显受到抑制且根系活力显著降低;系统中溶解性有机物组分(紫外类腐植酸和类色氨酸)含量随时间延长而增加,相关性分析表明二者均利于水中氮磷的去除。研究表明,风车草对低污染水体中氮磷具有较好的净化效果,且其净化效能受温度的影响。This study aimed to explore the removal effect of wetland aquatic plants on nitrogen and phosphorus in low-polluted water,effect of temperature,and changes of dissolved organic matter.The first-order reaction rate constants for TN and TP were 0.4493 and 0.5028,respectively at room temperature(24~30℃),and the removal rates of TN and TP were as high as 82.87%and 72.40%,respectively after 70 h.Low temperatures(4~8℃)significantly inhibited the removal of nitrogen and phosphorus and significantly reduced the root vigor of plants.The dissolved organic matter,including UV humic acids and tryptophan,increased with time,and correlation analysis showed that both were beneficial for the removal of nitrogen and phosphorus from water.The results showed that Cyperus alternifolius L.had a good purification effect on nitrogen and phosphorus in low-polluted water,and its purification efficiency was affected by temperature.

关 键 词：低污染水 风车草 温度 降解动力学 日变化率 

分 类 号：X52[环境科学与工程—环境工程] X173