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首页> 外文会议>International Symposium on Water-Rock Interaction >Role of sulfuric acid in chemical weathering of carbonate rocks for evaluating of carbon sinks in the Yangtze River Basin, China
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Role of sulfuric acid in chemical weathering of carbonate rocks for evaluating of carbon sinks in the Yangtze River Basin, China

机译：硫酸在碳酸盐岩化学风化中的作用，用于评估碳汇，中国长江盆地碳汇

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摘要

Chemical weathering of rock by river systems is an important process in the global carbon cycle. Sulfuric acid produced from anthropogenic sources in the Yangtze River basin of China has the potential to change rock weathering processes and the carbon cycle. Monitoring and analysis of the dissolved constituents of the main channel and major tributaries of the Yangtze River indicate that the sulfuric acid has enhanced the carbonate rock weathering rate by an average of 28% and reduced the CO_2 consumption rate by 12%. Analysis of dissolved sources for SO_4~(2-) in the Yangtze River indicates that 36% of SO_4~(2-) can be attributed to rainwater, 26% to dissolution of evaporitic rocks, and 38% to input from coal. Calculations indicate that the annual output flux of CO_2 from the Yangtze River Basin to the sea is 3495×10~4 tons, 80% of which is attributed to the weathering of carbonate rocks. Whilst the average consumption rate of atmospheric CO_2 is 20.6 t/km~2 y~(-1).
机译：河流系统的化学风化是全球碳循环中的一个重要过程。由中国长江盆地的人为源产生的硫酸有可能改变岩石风化过程和碳循环。对长江主要渠道和主要支流的溶解成分的监测和分析表明，硫酸增强了碳酸盐岩石风化率，平均增强了28％并将CO_2消耗率降低12％。阳星中SO_4〜（2-）的溶解来源分析表明，36％的SO_4〜（2-）可归因于雨水，26％的蒸发岩溶解，38％煤。计算表明，长江盆地到大海的CO_2的年产量通量为3495×10〜4吨，其中80％归因于碳酸盐岩的风化。虽然大气CO_2的平均消耗率为20.6 T / KM〜2 Y〜（-1）。

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