水环境因子对管道沉积物中氮磷释放的影响

薛重华; 赵沂萌; 孙家荣; 罗成; 李文辉; 王庆; 李俊奇; 黄鑫

doi:10.13205/j.hjgc.202312011

水环境因子对管道沉积物中氮磷释放的影响

doi: 10.13205/j.hjgc.202312011

薛重华^1,2, ,,
赵沂萌^1,2,
孙家荣³,
罗成⁴,
李文辉⁵,
王庆⁶,
李俊奇^1,2,
黄鑫⁷

1. 北京建筑大学城市雨水系统与水环境教育部重点实验室, 北京 100044;
2. 北京建筑大学北京节能减排与城乡可持续发展省部共建协同创新中心, 北京 100044;
3. 中国市政工程华北设计研究总院有限公司北京分公司, 北京 100043;
4. 北京市市政工程设计研究总院有限公司新疆分院, 乌鲁木齐 830000;
5. 乌鲁木齐市建设局, 乌鲁木齐 830000;
6. 乌鲁木齐建筑市场运行服务中心, 乌鲁木齐 830002;
7. 中国科学院生态环境研究中心饮用水科学与技术重点实验室, 北京 100085

基金项目:

西北干旱地区雨雪水收集和利用模式研究(00352023120)

详细信息

作者简介:
薛重华(1983-),男,副教授,主要研究方向为城市排水系统优化与污染控制、水环境修复。xuechonghua@bucea.edu.cn

通讯作者:
薛重华(1983-),男,副教授,主要研究方向为城市排水系统优化与污染控制、水环境修复。xuechonghua@bucea.edu.cn

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出版历程
- 收稿日期: 2023-10-22
- 网络出版日期: 2024-03-08

EFFECTS OF WATER ENVIRONMENTAL FACTORS ON NITROGEN AND PHOSPHORUS RELEASE FROM PIPELINE SEDIMENTS

XUE Chonghua^{1,2
, ,},
ZHAO Yimeng^1,2,
SUN Jiarong³,
LUO Cheng⁴,
Li Wenhui⁵,
WANG Qing⁶,
LI Junqi^1,2,
HUANG Xin⁷

1. Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
2. Beijing Energy Conservation & Sustainable Urban and Rural Development Collaboration Innovation Center, Beijing 100044, China;
3. North China Municipal Engineering Design & Research Institute Co., Ltd., Beijing Branch, Beijing 100081, China;
4. Xinjiang Branch of Beijing Municipal Engineering Design and Research Institute Co., Ltd., Urumqi, Xinjiang 830000, China;
5. Urumqi Construction Bureau, Urumqi, Xinjiang 830000, China;
6. Urumqi Construction Market Operation Service Center, Urumqi, Xinjiang 830002, China;
7. Key Laboratory of Drinking Water Science and Technology, Research Center For Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

摘要

摘要: 在雨水径流过程中管道沉积物携带的氮磷释放是造成受纳水体富营养化的主要原因。然而,不同受纳水体因其pH、温度、氮磷初始浓度等水质因素不同而对管道沉积物中氮磷的迁移转化具有不同影响效应。因此,采集了管道沉积物、再生水和天然河道水,分析了沉积物和水样的污染特征,再通过混合沉积物与不同水体模拟管道沉积物进入不同受纳水体的过程,探究其氮磷的释放特征及机理并分析了典型水环境因子对管道沉积物中氮磷释放的影响效应。结果表明:河水和再生水对管道沉积物中氮(包括总氮TN和氨氮NH₄⁺-N)的释放均有促进作用,而对总磷(TP)的释放起抑制作用,其中,再生水对总氮(TN)和氨氮(NH₄⁺-N)释放的促进作用更强,但对总磷的抑制作用更强;随着pH值的增大,管道沉积物中TP、NH₄⁺-N和TN的释放量会减少,3种物质在不同环境下的释放通量大小依次为:酸性>中性>碱性,这可能与水环境中的离子交换与物理吸附有关;随着温度的升高,管道沉积物中TP、NH₄⁺-N和TN的释放强度均增强;随着水环境中TP和NH₄⁺-N浓度的增加,管道沉积物中TP和NH₄⁺-N的释放受到抑制,当初始TP、NH₄⁺-N浓度分别为0.232,0.240mg/L时,达到了其对应的氮磷释放平衡浓度。研究结果有助于了解管道沉积物进入不同受纳水体后的氮磷释放机制,以期为雨水径流污染造成的城市景观水体富营养化污染调控提供科学依据。
- 管道沉积物 /
- 氮磷释放 /
- 补给水源 /
- 环境因子 /
- 水体富营养化
Abstract: The release of nitrogen and phosphorus from pipe sediments during stormwater runoff is the main cause of eutrophication in receiving waters. However, different receiving waters have different effects on the transport and transformation of nitrogen and phosphorus in pipeline sediments due to different water quality factors such as pH, temperature, and initial concentration of nitrogen and phosphorus. Therefore, in this study, we collected pipeline sediments, reclaimed water and natural river water, analyzed the pollution characteristics of the sediments and water samples, and then simulated the process of pipeline sediments entering into different receiving waters by mixing the sediments with different water bodies, explored the characteristics and mechanism of nitrogen and phosphorus release, and analyzed the effects of typical water environment factors on the release of nitrogen and phosphorus from pipeline sediments. The results showed that both river water and reclaimed water had a promoting effect on the release of nitrogen (including total nitrogen TN and ammonia nitrogen NH₄⁺-N) in pipeline sediments, while inhibiting the release of total phosphorus (TP), in which the reclaimed water had a stronger promoting effect on the release of total nitrogen and ammonia nitrogen (NH₄⁺-N) but a stronger inhibiting effect on the release of total phosphorus; the releases of TP, NH₄⁺-N and TN from the pipeline sediments were reduced with the increase of pH The release fluxes of the three substances in different environments were in the following order: acidic>neutral>alkaline, which might be related to ion exchange and physical adsorption in the aqueous environment; the release intensity of TP, NH₄⁺-N and TN in pipeline sediments was enhanced with increasing temperature; the release of TP and NH₄⁺-N from pipeline sediments was inhibited with the increase of the concentrations of TP and NH₄⁺-N in the aqueous environment When the initial TP and NH₄⁺-N concentrations were 0.232 mg/L and 0.240 mg/L, respectively, their corresponding equilibrium concentrations of nitrogen and phosphorus release were reached. This study helps to understand the mechanism of nitrogen and phosphorus release from pipeline sediments into different receiving water bodies, with a view to providing a scientific basis for the regulation of eutrophication pollution in urban landscape water bodies caused by stormwater runoff pollution.
- pipeline sediments /
- nitrogen and phosphorus release /
- recharge water sources /
- environmental factors /
- Eutrophication of water bodies

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