净水技术2025，Vol.44Issue(5)：105-115,11.DOI:10.15890/j.cnki.jsjs.2025.05.012
强紫外线辐射对人工湿地尾水处理效能的影响
Effect of Intense UV Radiation on Performance of Constructed Wetland for Tail water Treatment
摘要
Abstract
[Objective]Intense ultraviolet(UV)radiation occurs in plateau areas,which poses a challenge to constructed wetland for tailwater treatment.[Methods]This paper constructed a horizontal subsurface constructed wetland,investigated changes in effluent quality of wetland under different UV radiation(40 W/m2 and 60 W/m2),as well as the responses of indicators such as physiology,morphology and metabolism of wetland plants.Combined with the analysis of microbial community structure in the rhizomar,the influence of strong UV radiation on tailwater treatment efficiency of constructed wetland was explored.[Results]The results showed that the enhanced increased UV radiation led to descending of treatment efficiency of wetland.At UV radiation of 60 W/m2,removal rates of COD,ammonia nitrogen,TN and TP decreased by 9.21％,13.10％,12.45％and 5.77％in Calamus wetlands,respectively.UV radiation inhibited plant growth and induced cell membrane lipid peroxidation.The volume of plant roots decreased by 50％,superoxide dismutase(SOD)and ascorbate peroxidase(APX)increased by 7.03 times and 2.04 times,respectively,and the species richness of rhizosphere microbial community decreased by 14.83％.The relative abundance of Acidobacteriota increased in both Iris and Calamus wetlands,while the relative abundance of Thermodesulfobacteriota increased in Iris wetlands with decreasing trend in Calamus wetlands.Redundancy analysis(RDA)indicated that UV radiation played a crucial role in influencing the rhizosphere microbial community in wetlands.The radiation intensity demonstrated a positive correlation with Chloroflexota,Bacteroidota,and Pseudomonadota,which showed a negative correlation with Bacillota.[Conclusion]Intense UV radiation can inhibit plant growth and reduce rhizosphere microbial diversity,demonstrating cumulative effect,which shows negative impact on long-term operation of constructed wetlands.关键词
紫外线(UV)/人工湿地/尾水处理/湿地植物/根际微生物Key words
ultraviolet(UV)/constructed wetland/tailwater treatment/wetland plant/rhizosphere microorganism分类
资源环境引用本文复制引用
郭瑞,胡凯,许航,陈卫..强紫外线辐射对人工湿地尾水处理效能的影响[J].净水技术,2025,44(5):105-115,11.基金项目
河海大学生态环境与乡村振兴研究院开放研究课题 （）
西藏自治区重点研发计划项目(XZ202201ZY0018N) （XZ202201ZY0018N）
