相关实验视频

Updated: Jun 14, 2025

Wastewater Irrigation Impacts on Soil Hydraulic Conductivity: Coupled Field Sampling and Laboratory Determination of Saturated Hydraulic Conductivity

Wastewater Irrigation Impacts on Soil Hydraulic Conductivity: Coupled Field Sampling and Laboratory Determination of Saturated Hydraulic Conductivity

Published on: August 19, 2018

废水处理厂的废水增加了亚热带城市化河流的全球变暖潜力

Chen Kan¹, Feifei Wang¹, Tao Xiang¹

¹Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.

|September 6, 2024

概括

城市化河流接收废水废水是温室气体 (GHG) 的重要来源,增加了全球变暖的潜力. 废水改变生物地球化学循环,促进N2O和CO2的生产,并影响气候变化缓解战略.

科学领域:

环境科学环境科学
生物地质化学生物地质化学
城市生态城市生态学

背景情况:

河流对于全球碳 (C) 和 (N) 循环至关重要.
城市化河流作为温室气体 (GHG) 排放 (N2O,CO2,CH4) 的热点.
废水处理厂 (WWTP) 的废水对河流生物地质化学和温室气体产生有重大影响.

研究的目的:

调查温室气体分布及其控制环境因素在城市化河流接收废水.
量化废水对温室气体生产途径和排放特征的影响.
评估城市化河流对全球变暖潜力的贡献.

主要方法:

在潮湿和干燥期间取溶N2O,CO2和CH4度的现场采样.
分析环境参数,包括C和N负荷,C/N比率,溶氧 (DO) 和液压停留时间.
评估甲基生成,N2O生产,CH4氧化和碳固定过程.
在20年和100年范围内评估全球变暖潜力 (GWP).

主要成果:

废水增加了C和N负载,降低了C/N比率,并促进了N2O和CH4的生产.
城市化,高居住时间,低DO和高有机C有利于下游的甲化.
离出口附近的CH4氧化和甲反应抑制了CH4的排放,但增加了CO2的产生.
碳固定被抑制下游,导致二氧化碳排放增加.
持续的C,N和输入改变了微生物群落,增加了温室气体生产潜力.
与上游相比,下游的GWP显著增加 (在20年规模上高达186%).

结论:

接收WWTP废水的城市化河流作为反应堆,显著增加温室气体排放和GWP.
由IPCC推的排放因子可能低估了高度污染的城市河流中的N2O潜力.
调查结果强调,需要制定有效的战略,以减轻城市河流系统的温室气体排放.
了解废水对河流生物地球化学的影响对于缓解气候变化的努力至关重要.

关键词:

碳排放量碳排放量碳排放量功能性基因是一种功能性基因.全球变暖的潜在影响温室气体的温室气体是什么含的负荷是多少废水处理厂的废水废水处理厂的废水

更多相关视频

Design and Construction of an Urban Runoff Research Facility

Design and Construction of an Urban Runoff Research Facility

Published on: August 8, 2014

Use of a Battery of Chemical and Ecotoxicological Methods for the Assessment of the Efficacy of Wastewater Treatment Processes to Remove Estrogenic Potency

Use of a Battery of Chemical and Ecotoxicological Methods for the Assessment of the Efficacy of Wastewater Treatment Processes to Remove Estrogenic Potency

Published on: September 11, 2016

相关概念视频

Global Climate Change

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.

Responses to Drought and Flooding

Responses to Drought and Flooding

Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.

Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.

What is Climate?

What is Climate?

Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.