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首页> 外文期刊>Environmental Science & Technology >Monitoring Effect of SO_2 Emission Abatement on Recovery of Acidified Soil and Streamwater in Southwest China
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Monitoring Effect of SO_2 Emission Abatement on Recovery of Acidified Soil and Streamwater in Southwest China

机译：西南地区减排SO_2对酸化土壤和水流恢复的监测效果

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摘要

Following Europe and North America, East Asia has become a global hotspot of acid deposition, with very high deposition of both sulfur (S) and nitrogen (N) occurring in large areas in southwest and southeast China. Great efforts have been made in reducing national emission of sulfur dioxide (SO_2) since 2006 in China. However, the total emission of nitrogen oxides (NOx) continued to increase until 2011. To evaluate the effects of SO_2 and NOx emission abatement on acid deposition and acidification of soil and water, we monitored the chemical composition of throughfall, soil water, and streamwater from 2001 to 2013 in a small, forested catchment near Chongqing city in Southwestern China. The deposition of S decreased significantly, whereas N deposition increased in the recent years. This clearly showed the effect of SO_2 abatement but not of NOx. Overall the rate of acid deposition was reduced. However, there was delay in the recovery of soil and surface water from acidification, probably due to desorption of previously stored sulfate (SO_4~(2-)) and increase in nitrate (NO_3~-) leaching from soil. The average acid input by N transformations has greatly exceeded the H~+ input directly by atmospheric deposition. The reversal of acidification with an increase in pH of soil water, requires additional abatement of emissions of both SO_2 and NOx.
机译：继欧洲和北美之后，东亚已成为全球酸性沉积的热点，在中国西南和东南部的大部分地区，硫（S）和氮（N）的沉积量都很高。自2006年以来，中国在减少国家二氧化硫（SO_2）排放方面做出了巨大努力。但是，直到2011年，氮氧化物（NOx）的总排放量仍在增加。为评估SO_2和NOx排放减少对土壤和水的酸沉降和酸化的影响，我们监测了通水，土壤水和溪流的化学成分从2001年到2013年，在中国西南重庆市附近的一个小森林小流域。近年来，S的沉积显着减少，而N的沉积增加。这清楚地显示了减少SO_2的效果，但没有显示NOx的效果。总体上，酸的沉积速率降低了。然而，由于酸化作用使土壤和地表水的恢复延迟，这可能是由于先前存储的硫酸盐（SO_4〜（2-））的解吸和土壤中硝酸盐（NO_3〜-）的淋溶增加。 N转化的平均酸输入量大大超过了大气沉积直接输入的H〜+。随着土壤水pH值的增加，酸化作用的逆转需要额外减少SO_2和NOx的排放。

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  • 来源
    《Environmental Science & Technology》 |2017年第17期|9498-9506|共9页
  • 作者

    Qian Yu; Ting Zhang; Xiaoxiao Ma; Ronghua Kang; Jan Mulder; Thorjorn Larssen; Lei Duan;

  • 作者单位

    State Key laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China;

    State Key laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China;

    State Grid Xingyuan Company Limited, Beijing 100761, China;

    Department of Environmental Sciences, Norwegian University of Life Sciences, Box 5003, NO-1432 As, Norway;

    Department of Environmental Sciences, Norwegian University of Life Sciences, Box 5003, NO-1432 As, Norway;

    Norwegian Institute for Water Research, Gaustadalleen 21, 0349 Oslo, Norway;

    State Key laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China,Collaborative Innovation Centre for Regional Environmental Quality, Tsinghua University, Beijing 100084, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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