Study on water purification effects and microbial community compositions of the estuarine wetland buffer zones during a low-temperature period

¹ Beijing Engineering Research Center of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
² University of Chinese Academy of Sciences, Beijing 100049, China
³ College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
⁴ China Xiong’an Group Co. Ltd, Baoding 071000, Hebei Province
⁵ College of Ecology and Environment, Hebei University, Hebei 071000, China
⁶ China Xiong’an Group Ecological Construction Investment Co. Ltd, No.2, Rongcheng 071000, Hebei Province

^* Corresponding author: panyue_zhang@bjfu.edu.cn

Abstract

The estuarine wetland buffer zone of the Fuhe river plays an important role in terms of improving water quality of Baiyangdian lake. In this study, the water purification effect and microbial community composition of an estuarine wetland buffer zone during a low-temperature period were investigated (March, 2021). The results indicated that the pre-sedimentation ecological pond (Pep), the subsurface flow wetland (Sfw), and the aquatic plant pond (App) exhibited good removal effects on total phosphorus (TP) and NH₃-N. In contrast, the removal effects on chemical oxygen demand (COD) and total nitrogen (TN) was unsatisfied. Various phosphorus removal bacteria were detected in the water samples from the Pep and the Sfw, such as Arthrobacter, Flavobacterium, and Planococcus. These findings indicated the water purification performance and the microbial community composition in an estuarine wetland buffer zone during a low-temperature period.