[1]李檬,田腾飞,黄鹏,等.沉水植物引发水体DO与ORP负相关变化：现象与机制[J].中国给水排水,2025,41(23):1-7.
　LIMeng,TIANTeng-fei,HUANGPeng,et al.Submerged Macrophytes Induced Negative Variation between Dissolved Oxygen and Oxidation-Reduction Potential in Water: Phenomenon and Mechanism Exploration[J].China Water & Wastewater,2025,41(23):1-7.
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沉水植物引发水体DO与ORP负相关变化：现象与机制

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第23期 页码: 1-7 栏目: 出版日期: 2025-12-01
Title:
Submerged Macrophytes Induced Negative Variation between Dissolved Oxygen and Oxidation-Reduction Potential in Water: Phenomenon and Mechanism Exploration
作者:
李檬1,2， 田腾飞1,2， 黄鹏1,2， 孙永利1,2， 范波1,2， 李家驹1,2
（1.中国市政工程华北设计研究总院有限公司，天津 300074；2.天津市城镇排水系统重点实验室，天津 300074）
Author(s):
LI　Meng1，2， TIAN　Teng-fei1，2， HUANG　Peng1，2， SUN　Yong-li1，2， FAN　Bo1，2， LI　Jia-ju1，2
（1. North China Municipal Engineering Design & Research Institute Co. Ltd.， Tianjin 300074， China； 2. Tianjin Key Laboratory of Urban Drainage System， Tianjin 300074， China）
关键词:
溶解氧;  氧化还原电位;  沉水植物;  金鱼藻;  光合作用;  权重模型
Keywords:
dissolved oxygen (DO);  oxidation-reduction potential (ORP);  submerged macrophyte;  C. demersum;  photosynthesis;  weight model
摘要:
传统水环境管理者普遍认为溶解氧（DO）与氧化还原电位（ORP）是正相关关系。本研究首次揭示了沉水植物型水体中DO与ORP呈现昼夜负相关变化规律：白天DO升高时ORP降低，而黑夜DO下降时ORP回升。通过多体系对比实验，证实该现象由沉水植物光合作用直接驱动，光照度、光照时长、植株密度及pH等变量的改变仅能调节DO与ORP的波动幅度，并未改变二者固有的负相关变化特征，而沉水植物存在与否是决定该负相关现象形成的核心因素。基于系统物质平衡与电位理论分析，其内在机制可能涉及沉水植物同步释氧与分泌还原性物质，从而导致氧化还原状态的动态失衡。此现象的发现与确认为城市水体水质监测和生态系统健康评估提供了新的科学视角。
Abstract:
Conventional water quality management assumes a positive correlation between dissolved oxygen (DO) and oxidation-reduction potential (ORP). Here, we report a previously unrecognized negative correlation pattern between DO and ORP in submerged macrophyte-dominated waters: ORP decreases during daytime DO elevation, whereas ORP rebounds during nighttime DO depletion. Comparative experiments across different systems demonstrated that this phenomenon was mechanistically driven by macrophyte photosynthesis. Changes in light illuminance and duration, plant density, and pH only changed the range of DO and ORP variations, without altering their intrinsic negative correlation. The presence or absence of submerged macrophytes constituted the determinant of this inverse relationship. Mechanistic analysis integrating mass balance and potential theory suggested that oxygen release and reducing metabolite secretion by plants might induce the imbalance of redox state. The discovery and confirmation of this phenomenon will provide a new scientific perspective for urban water body quality monitoring and ecosystem health assessment.

相似文献/References:

[1]赵青,黄鹏,李鹤男,等.基于DO和ORP考量水生植物的生态修复效果[J].中国给水排水,2023,39(5):94.
　ZHAOQing,HUANGPeng,LIHe-nan,et al.Ecological Restoration Performance of Aquatic Plants Based on DO and ORP Consideration[J].China Water & Wastewater,2023,39(23):94.
[2]李鹤男,孙永利,黄鹏,等.苦草改善底泥氧化还原特性及微生物群落结构研究[J].中国给水排水,2023,39(23):91.
　LIHe-nan,SUNYong-li,HUANGPeng,et al.Vallisneria natans for Improvement of Oxidation Reduction Characteristics and Microbial Community Structure of Sediment[J].China Water & Wastewater,2023,39(23):91.

更新日期/Last Update: 2025-12-01