Chemical weathering and the role of sulfuric and nitric acids in carbonate weathering: Isotopes (C-13, N-15, S-34, and O-18) and chemical constraints | |
Cai Li; Hongbing Ji | |
刊名 | Journal of Geophysical Research: Biogeosciences
![]() |
2016 | |
卷号 | 121期号:5页码:1288-1305 |
通讯作者 | Hongbing Ji |
英文摘要 | Multiple isotopes (C-13-DIC, S-34 and O-18-SO42-, N-15 and O-18-NO3-) and water chemistry were used to evaluate weathering rates and associated CO2 consumption by carbonic acid and strong acids (H2SO4 and HNO3) in a typical karst watershed (Wujiang River, Southwest China). The dual sulfate isotopes indicate that sulfate is mainly derived from sulfide oxidation in coal stratum and sulfide-containing minerals, and dual nitrate isotopes indicate that nitrate is mainly derived from soil N and nitrification. The correlation between isotopic compositions and water chemistry suggests that sulfuric and nitric acids, in addition to carbonic acid, are involved in carbonate weathering. The silicate and carbonate weathering rates are 7.2tkm(-2)yr(-1) and 76tkm(-2)yr(-1), respectively. In comparison with carbonate weathering rates (43tkm(-2)yr(-1)) by carbonic acid alone, the subsequent increase in rates indicates significant enhancement of weathering when combined with sulfuric and nitric acids. Therefore, the role of sulfuric and nitric acids in the rock weathering should be considered in the global carbon cycle. |
学科主题 | 环境地球化学 |
语种 | 英语 |
公开日期 | 2017-09-15 |
内容类型 | 期刊论文 |
源URL | [http://ir.gyig.ac.cn:8080/handle/352002/6223] ![]() |
专题 | 地球化学研究所_环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文 |
通讯作者 | Hongbing Ji |
推荐引用方式 GB/T 7714 | Cai Li,Hongbing Ji. Chemical weathering and the role of sulfuric and nitric acids in carbonate weathering: Isotopes (C-13, N-15, S-34, and O-18) and chemical constraints[J]. Journal of Geophysical Research: Biogeosciences,2016,121(5):1288-1305. |
APA | Cai Li,&Hongbing Ji.(2016).Chemical weathering and the role of sulfuric and nitric acids in carbonate weathering: Isotopes (C-13, N-15, S-34, and O-18) and chemical constraints.Journal of Geophysical Research: Biogeosciences,121(5),1288-1305. |
MLA | Cai Li,et al."Chemical weathering and the role of sulfuric and nitric acids in carbonate weathering: Isotopes (C-13, N-15, S-34, and O-18) and chemical constraints".Journal of Geophysical Research: Biogeosciences 121.5(2016):1288-1305. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论