柳州市大气降水的化学特征与成因分析  

Chemical characteristics and causes analysis of atmospheric precipitation in Liuzhou City

作　　者：郭琳 刘剑斌 唐静 徐景秋 GUO Lin;LIU Jianbin;TANG Jing;XU Jingqiu(Liuzhou Environment Monitoring Center Station,Liuzhou 545000,China)

机构地区：[1]广西壮族自治区柳州生态环境监测中心,广西柳州545000

出　　处：《黑龙江环境通报》2024年第8期22-24,共3页Heilongjiang Environmental Journal

摘　　要：为针对柳州市酸雨污染防治提供相关支持,采用2023年1—12月柳州市大气降水监测数据,结合气象因素和化学变化特征进行分析,探讨了柳州市的酸雨污染成因。结果表明:1)2023年柳州市降水pH值范围4.04~7.46,降水类型属于硫酸-硝酸混合型降水,酸雨频率季节性变化明显,为夏季低、冬春季高。2)降水的离子组成中,主要阴离子成分是硫酸根和硝酸根,主要阳离子成分是铵离子和钙离子,除了2021年离子浓度出现较大幅度上升,其余年份降水离子浓度基本呈下降趋势。3)柳州市大气降水中酸雨的形成可能与地形气候因素、酸性污染物的外来输送、土壤中碱性物质的削减有关。In order to provide support for the control of acid rain pollution in Liuzhou City,the atmospheric precipitation monitoring data from January to December 2023 in Liuzhou City were analyzed in conjunction with meteorological factors and chemical characteristics to explore the causes of acid rain pollution in Liuzhou City.The results show that:1)The pH range of precipitation in Liuzhou City in 2023 was form 4.04 to 7.46,and the type of precipitation belonged to the mixed sulfuric-nitric acid type.The frequency of acid rain showed significant seasonal variation,with lower occurrences in summer and higher occurrences in winter and spring.2)The main anions in the ionic composition of precipitation were sulfate and nitrate,and the main cations were ammonium and calcium ions.Except for a significant increase in ionic concentrations in 2021,the concentrations of precipitation ions showed a general decreasing trend in other years.3)The formation of acid rain in the atmospheric precipitation of Liuzhou City may be related to topographical and climatic factors,the transport of acidic pollutants from outside sources,and the reduction of alkaline substances in the soil.

关 键 词：柳州市 大气降水 酸雨频率 成因分析 

分 类 号：X51[环境科学与工程—环境工程]