摘要
垃圾填埋场是温室气体甲烷的重要人为排放源之一,垃圾分解产生的甲烷会发生垂向和侧向迁移,并被氧化固定在垃圾填埋场中。研究显示与硫酸盐还原作用耦合的甲烷厌氧氧化(AOM)作用在垃圾填埋场内及其渗滤液羽状体中均可发生,形成自生碳酸盐和硫化物等沉积。因此,AOM作用是垃圾填埋场甲烷减排的重要途径之一。然而只运用气体地球化学方法与技术难以确定填埋场AOM作用的特征,而填埋场内自生碳酸盐可能保存了AOM作用的信息,但其矿物学、地球化学等特征很少有报导,还有待进一步研究确定。
Landfill is one of the important anthropogenic sources of the greenhouse gas——methane.Methane formed by waste degradation will migrate vertically and laterally and be oxidized.Previous studies showed that anaerobic oxidation of methane（AOM）may occur in a landfill and its leachate plume,mainly associated with sulfate reduction,and may result in the formation of authigenic carbonate and sulfide.Therefore,it is suggested that AOM is an important way of methane mitigation in landfill sites.However,it is hard to characterize AOM when gas geochemical approaches are only used.Antigenic carbonates in landfills may record the information about AOM,but their mineralogical and geochemical characteristics should be studied further due to few reports on them.
出处
《地球与环境》
CAS
CSCD
北大核心
2014年第6期810-815,共6页
Earth and Environment
基金
广州地球化学研究所135项目(Y234021001)
