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The hydrochemistry properties of precipitation in karst tourism city (Guilin), Southwest China

机译：中国西南喀斯特旅游城市（桂林）降水的水化学特征

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摘要

A comprehensive study on the chemical compositions of rainwater was carried out from January 2008 to November 2011 in Guilin, China. The 396 samples were analyzed for pH and electrical conductivity, and 44 among of 396 samples were analyzed for major ions. The result shows that pH value ranges from 3.44 to 7.16, and the occurrences of acid rain may increase with natural factors and human activities. The order of the main ion concentration in precipitation is SO4 (2-) > Ca2+ > NH4 (+) > NO3 (-) > Cl- > Na+ > F- > Mg2+ > K+ (weighted average). The correlation of the main cations, neutralization factors (NF), enrichment factor, and ionic ratio shows that acid rain can be mitigated slightly by the neutralization effect of a large amount of alkali ions. The SO4 (2-), NO3 (-), NH4 (+), and a fraction of Ca2+ may originate from emissions of human activities, and the K+, Mg2+, and a majority of Ca2+ may originate from weathering of soil and rock. Mg2+ may transport long distance from large cities in the surrounding area. Among them, hyper-accumulation of NO3 (-) is produced by lots of vehicle and festival emissions. The hydrochloride may increase rainfall acidity, which refers to the temporary acidity. In addition to the input of pH value and acid ions, the input of alkali ions should be considered in the future evaluation of acid deposition in cites.
机译：2008年1月至2011年11月在中国桂林进行了雨水化学成分的综合研究。分析了396个样品的pH和电导率，分析了396个样品中的44个中的主要离子。结果表明，pH值范围为3.44〜7.16，酸雨的发生可能随自然因素和人类活动的增加而增加。沉淀中主要离子浓度的顺序为SO4（2-）> Ca2 +> NH4（+）> NO3（-）> Cl-> Na +> F-> Mg2 +> K +（加权平均值）。主要阳离子，中和因子（NF），富集因子和离子比率的相关性表明，通过大量碱金属离子的中和作用可以略微缓解酸雨。 SO4（2-），NO3（-），NH4（+）和一部分Ca2 +可能源自人类活动的排放，而K +，Mg2 +和大部分Ca2 +可能源自土壤和岩石的风化。 Mg2 +可能会从周围地区的大城市运送很长的距离。其中，大量的车辆和节日排放会产生NO3（-）的过度积累。盐酸盐可能会增加降雨的酸度，这是暂时的酸度。除了输入pH值和酸离子外，在将来评估城市酸沉降时还应考虑输入碱金属离子。

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  • 来源
    《Environmental earth sciences》 |2015年第2期|1061-1069|共9页
  • 作者

    Yu Shi; Kuo Yi-Ming; Du Wenyue; He Shiyi; Sun Ping-An; Yuan Yaqiong; Li Rui; Li Youshan;

  • 作者单位

    Chinese Acad Geol Sci, Karst Dynam Lab, Inst Karst Geol, Minist Land & Resources GuangXi, Guilin, Peoples R China|China Univ Geosci, Sch Environm Studies, Wuhan 430074, Peoples R China;

    China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China|China Univ Geosci, Sch Environm Studies, Wuhan 430074, Peoples R China;

    Chinese Acad Geol Sci, Karst Dynam Lab, Inst Karst Geol, Minist Land & Resources GuangXi, Guilin, Peoples R China;

    Chinese Acad Geol Sci, Karst Dynam Lab, Inst Karst Geol, Minist Land & Resources GuangXi, Guilin, Peoples R China;

    Chinese Acad Geol Sci, Karst Dynam Lab, Inst Karst Geol, Minist Land & Resources GuangXi, Guilin, Peoples R China;

    Southwest Univ, Sch Geog Sci, Chongqing 400715, Peoples R China;

    Southwest Univ, Sch Geog Sci, Chongqing 400715, Peoples R China;

    Guilin Environm Protect Monitoring Stn, Guilin 541004, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Precipitation; Chemical composition; Enrichment factors; Neutralization factors; Guilin;

    机译：沉淀;化学成分;富集因子;中和因子;桂林;

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