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| 硫酸参与的湿热流域化学风化对河流水化学影响研究综述 |
| A Review of the Effects of Chemical Weathering with Sulfuric Acid on River Hydrochemistry in Hot and Humid Catchment |
| 投稿时间：2021-03-30 修订日期：2021-07-04 |
| DOI：10.14050/j.cnki.1672-9250.2021.49.092 |
| 中文关键词: 硫酸 水化学 化学风化 碳循环 人类活动 |
| 英文关键词: sulfuric acid hydrochemistry chemical weathering carbon cycle human activity |
| 基金项目:国家自然科学基金项目（41871014）。 |
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| 摘要点击次数: 57 |
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| 中文摘要: |
| 河流水化学组成可以提供反映流域内岩石化学风化过程及河流离子来源等生物地球化学的信息。化学风化是全球碳循环的重要环节，湿热流域的水热条件可以促进流域岩石化学风化。硫酸和碳酸一样可以作为侵蚀介质参与流域岩石的化学风化，硫酸参与的湿热流域碳酸盐类化学风化可释放CO2，但其参与的硅酸盐类化学风化对大气CO2没有显著影响，故若不考虑硫酸作用将会导致对岩石化学风化作用下大气CO2消耗通量的高估。水化学组成受到流域岩石化学风化的影响，通过对河流水化学组成和溶解无机碳（DIC）稳定同位素组成（δ13C）的分析可以确定河流水化学类型并揭示硫酸对流域岩石化学风化的定量影响。目前关于硫酸对河流水化学影响的研究逐渐增多，未来关于小流域尺度上硫酸对河流水化学的影响、硫酸影响下河流CO2的脱气过程以及人类活动对河流水化学的影响等方面需要更多关注。 |
| 英文摘要: |
| The river water chemical compositions can provide biogeochemical information that reflects the chemical weathering process of rocks and the source of river ions in the catchment. Chemical weathering is an important part of global carbon cycle. Hydrothermal conditions in hot and humid catchments can promote chemical weathering of rocks in catchments. Sulfuric acid and carbonic acid both can participate in the chemical weathering of the rock. The chemical weathering of carbonates in hot and humid basins with sulfuric acid can release CO2, but the chemical weathering of silicates with sulfuric acid has no significant effect on atmospheric CO2. Therefore, if sulfuric acid is not taken into account, the atmospheric CO2 consumption flux under the chemical weathering of rocks will be overestimated. The hydrochemical composition of the river is affected by the chemical weathering of the rocks in the river catchment. The hydrochemical types of the river can be determined and the quantitative influence of sulfuric acid on the chemical weathering of the rocks in the river catchment can be revealed by analyzing the hydrochemical composition of the river and the stable isotope composition of dissolved inorganic carbon (DIC) (δ13C). At present, more and more studies have been conducted on the effects of sulfuric acid on river hydrochemistry. In the future, more attention should be paid to the effects of sulfuric acid on river hydrochemistry at the small catchment scale, the degassing process of river CO2 under the influence of sulfuric acid, and the impact of human activities on river hydrochemistry. |
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