Methane and nitrous oxide concentrations and fluxes from heavily polluted urban streams: Comprehensive influence of pollution and restoration

溪流 环境科学 污染 一氧化二氮 分水岭 环境化学 水文学(农业) 甲烷 生态学 化学 地质学 计算机网络 岩土工程 机器学习 计算机科学 生物
作者
Xiaofeng Wang,Lele Yu,Tingting Liu,Yixin He,Shengnan Wu,Huai Chen,Xingzhong Yuan,Jilong Wang,Xian‐Xiang Li,Hang Li,Ziyi Que,Zhaoyin Qing,Ting Zhou
出处
期刊:Environmental Pollution [Elsevier BV]
卷期号:313: 120098-120098 被引量:23
标识
DOI:10.1016/j.envpol.2022.120098
摘要

Streams draining urban areas are usually regarded as hotspots of methane (CH4) and nitrous oxide (N2O) emissions. However, little is known about the coupling effects of watershed pollution and restoration on CH4 and N2O emission dynamics in heavily polluted urban streams. This study investigated the CH4 and N2O concentrations and fluxes in six streams that used to be heavily polluted but have undergone different watershed restorations in Southwest China, to explore the comprehensive influences of pollution and restoration. CH4 and N2O concentrations in the six urban streams ranged from 0.12 to 21.32 μmol L-1 and from 0.03 to 2.27 μmol L-1, respectively. The calculated diffusive fluxes of CH4 and N2O were averaged of 7.65 ± 9.20 mmol m-2 d-1 and 0.73 ± 0.83 mmol m-2 d-1, much higher than those in most previous reports. The heavily polluted streams with non-restoration had 7.2 and 7.8 times CH4 and N2O concentrations higher than those in the fully restored streams, respectively. Particularly, CH4 and N2O fluxes in the fully restored streams were 90% less likely than those found in the unrestored ones. This result highlighted that heavily polluted urban streams with high pollution loadings were indeed hotspots of CH4 and N2O emissions throughout the year, while comprehensive restoration can effectively weaken their emission intensity. Sewage interception and nutrient removal, especially N loadings reduction, were effective measures for regulating the dynamics of CH4 and N2O emissions from the heavily polluted streams. Based on global and regional integration, it further elucidated that increasing environment investments could significantly improve water quality and mitigate CH4 and N2O emissions in polluted urban streams. Overall, our study emphasized that although urbanization could inevitably strengthen riverine CH4 and N2O emissions, effective eco-restoration can mitigate the crisis of riverine greenhouse gas emissions.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
卡卡荧光橙完成签到,获得积分10
1秒前
RYAN发布了新的文献求助30
1秒前
3秒前
通通完成签到,获得积分10
4秒前
4秒前
5秒前
Jasper应助bitahu采纳,获得10
5秒前
book发布了新的文献求助10
5秒前
fish完成签到,获得积分10
5秒前
shiyi应助苗条辣条采纳,获得10
6秒前
dwj发布了新的文献求助10
6秒前
jogrgr发布了新的文献求助10
8秒前
Holly12345应助榆术山支子采纳,获得10
9秒前
石会发发布了新的文献求助10
9秒前
迷人芙蓉发布了新的文献求助10
9秒前
潇洒冰蓝完成签到,获得积分10
9秒前
11秒前
tsntn完成签到,获得积分10
12秒前
知性的幻巧完成签到,获得积分10
12秒前
12秒前
橘子发布了新的文献求助20
13秒前
Eunhyo发布了新的文献求助10
13秒前
没有昵称发布了新的文献求助10
14秒前
李爱国应助sci一区采纳,获得10
15秒前
Jasper应助香蕉外套采纳,获得10
15秒前
16秒前
明理的霸发布了新的文献求助10
18秒前
18秒前
RYAN完成签到,获得积分10
18秒前
19秒前
bitahu发布了新的文献求助10
19秒前
Owen应助吃鸡腿吗采纳,获得10
19秒前
raoxray完成签到 ,获得积分10
20秒前
814791097完成签到,获得积分10
21秒前
淡然柚子发布了新的文献求助10
23秒前
letter完成签到 ,获得积分10
23秒前
尔沁发布了新的文献求助30
25秒前
小枫完成签到,获得积分10
26秒前
27秒前
Finama关注了科研通微信公众号
27秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Effective Learning and Mental Wellbeing 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3975339
求助须知:如何正确求助?哪些是违规求助? 3519670
关于积分的说明 11199199
捐赠科研通 3256002
什么是DOI,文献DOI怎么找? 1798043
邀请新用户注册赠送积分活动 877386
科研通“疑难数据库(出版商)”最低求助积分说明 806305