摘要
全球气候变暖问题越来越受到重视,随着人工湿地广泛应用于水处理,人工湿地温室气体排放也受到关注。采用文献计量学方法,筛选分析了Web of Science(WoS)核心数据库中人工湿地温室气体排放相关文献,聚类统计了其中216篇研究文献关键词,总结了主要研究方向及进展。结果表明:1)人工湿地温室气体排放研究相关文献数量于2003年开始逐年增加,文献被引频次同样逐年上升;主要研究热点关键词聚类为四大研究方向,即基质和曝气对温室气体排放的影响、植物对温室气体排放的影响、一氧化二氮(N2O)产生及去除路径、甲烷(CH4)产生及去除路径。2)人工湿地基质种类及配置均会影响人工湿地温室气体排放;而曝气可改变人工湿地内部氧化还原条件导致温室气体排放发生变化;植物能够减少人工湿地温室气体排放总量,且不同植物因通气组织及生物量的差异引起人工湿地温室气体排放差异。3)人工湿地N2O产生于硝化/反硝化、厌氧氨氧化、硝酸盐异化还原成铵等多条路径,但N2O去除路径仅有反硝化;人工湿地CH4产生于有机物厌氧氧化过程,其去除则包括好氧氧化和厌氧氧化2条路径。基于上述综述,提出人工湿地工艺/运行方式优选、内部配置优化、外部条件强化等方面的优化模式,并提出未来需深入研究人工湿地内部N2O及CH4转化机制,优化调控人工湿地温室气体排放,以实现人工湿地减污降碳。
The problem of global warming has being paid attention to increasingly,and the greenhouse gases(GHGs)emissions from the constructed wetlands(CWs)have been concerned,with the widely application of CWs in water treatment.A bibliometric analysis of the related literatures on GHGs emissions from CWs in the Web of Science(WoS)core database was conducted,the key words of 216 research articles were analyzed by clustering,and the progress of main research subjects were summarized.The results showed that:1)The number of literature on GHGs emissions from constructed wetlands had been increasing since 2003,and the citation frequency of articles also increased.The hot-spot clustering keywords focused on four research directions:the effects of substrate and aeration on greenhouse gases emissions,the effects of plants on greenhouse gases emissions,nitrous oxide(N2O)production and removal pathways,methane(CH4)production and removal pathways.2)The type and configuration of substrates played important roles in the GHGs emissions in CWs.The process of aeration has the potential to alter the internal redox in CWs,thereby impacting the release of GHGs.The presence of plants led to a decrease in the overall GHGs emissions in CWs,while variations in aerenchyma and biomass among different plants resulted in different GHGs emissions.3)The N2O in CW was produced by various processes such as nitrification/denitrification,anaerobic ammonia oxidation,nitrate reduction to ammonium,and other pathways.However,denitrification was the unique pathway to remove N2O.The CH4 was produced by anaerobic oxidation of organic matter and removed in two paths of aerobic oxidation and anaerobic oxidation.Therefore,an optimized model was proposed to regulate GHGs emissions in CWs by process combination and operation,substrate configuration and plant selection,carbon addition and intermittent aeration.And it was also proposed to further study the conversion mechanism of N2O and CH4 in CWs,optimize the regulation of GHGs emissions,and achieve pollution reduction and carbon reduction in CWs in the future.
作者
马洪运
周磊
张雪琦
孔令为
成水平
MA Hongyun;ZHOU Lei;ZHANG Xueqi;KONG Lingwei;CHENG Shuiping(Key Laboratory of Yangtze River Water Environment,Ministry of Education,College of Environmental Science and Engineering,Tongji University;Key Laboratory of Coastal Environment and Resources of Zhejiang Province,School of Engineering,Westlake University;Shanghai Institute of Pollution Control and Ecological Security)
出处
《环境工程技术学报》
CAS
CSCD
北大核心
2023年第6期2043-2052,共10页
Journal of Environmental Engineering Technology
基金
国家自然科学基金项目(52170168)
中央高校基本科研业务费专项(22120220367)
浙江省自然科学基金联合基金重点项目(LHZ22E090001)。
关键词
人工湿地
温室气体排放
影响因素
产生及去除路径
优化模式
constructed wetlands(CWs)
greenhouse gases(GHGs)emission
influencing factor
production and removal pathway
optimization mode
作者简介
马洪运(1997-),男,硕士研究生,研究方向为生态工程,782038245@qq.com;成水平(1969-),男,教授,博士,研究方向为生态工程,shpcheng@tongji.edu.cn。
