本文關(guān)鍵詞： 大氣降水 化學(xué)特征 離子 南昌市　出處：《環(huán)境科學(xué)研究》2016年11期 　論文類型：期刊論文

【摘要】：為了解南昌新城區(qū)大氣降水化學(xué)特性和來源,于2013年5月15日—2014年1月24日采集當(dāng)?shù)赜行Ы邓畼悠?9個(gè),分析其降水化學(xué)特性,包括p H、電導(dǎo)率和主要離子(Na+、NH4+、K+、Mg2+、Ca2+、F-、Cl-、NO3-和SO42-)的濃度.結(jié)果表明:南昌市新城區(qū)降水p H介于3.67~5.86之間,降水量加權(quán)平均值為4.63;電導(dǎo)率在6.13~73.01μS湓cm之間,降水量加權(quán)平均值為29.02μS湓cm;降水中總離子濃度為154.1~474.3μeq湓L,降水量加權(quán)平均值為300.1μeq湓L.SO42-、Ca2+、NH4+和NO3-是降水中的主要離子,合計(jì)占總離子濃度的82.6%.SO42-湓NO3-(當(dāng)量離子濃度比)在1.82~3.61之間,平均值為2.66.南昌市新城區(qū)降水相對(duì)酸度為0.43,57.0%的致酸物質(zhì)被大氣中堿性物質(zhì)中和,主要的酸度中和因子為Ca2+和NH4+,分別貢獻(xiàn)50.0%和36.6%的中和量.陰陽離子三角圖分析表明,陰離子主要來自人為源;陽離子來源包括地殼源和人為源.富集系數(shù)分析表明,99.5%的Ca2+、88.4%的K+、63.0%的Mg2+來自地殼源;Mg2+、K+、Ca2+的海洋源輸入分別為30.7%、4.6%和0.5%;1.2%的Cl-來自地殼源,55.8%來自海洋源,43.0%來自人為源;96.8%的SO42-和99.5%的NO3-來自人為源.研究顯示,南昌市新城區(qū)的降水為混合型降水,人為源對(duì)大氣環(huán)境產(chǎn)生了重要影響.
[Abstract]:In order to understand the chemical characteristics and sources of precipitation in Xincheng District of Nanchang 39 local effective precipitation samples were collected from May 15th 2013 to January 24th 2014 and their precipitation chemical characteristics were analyzed. These include pH, electrical conductivity and the main ions, Na, NH _ 4, K, mg _ 2, Ca ~ (2 +), F ~ (-) ~ (-) ~ (-). The results show that the precipitation pH of Nanchang city is between 3.67 and 5.86, and the weighted average of precipitation is 4.63; The conductivity is between 6.13 渭 S and 73.01 渭 S, and the weighted average of precipitation is 29.02 渭 S / cm. The total ion concentration in precipitation is 154.1 渭 eq 474.3 渭 eq / L, and the weighted average of precipitation is 300.1 渭 eq / L so _ 42-Ca ~ (2 +). NH4 and NO3- are the main ions in precipitation, which account for 82.6% of the total ion concentration. The ratio of equivalent ion concentration to so _ 42-no _ 3-is between 1.82 and 3.61. The average value is 2.66.The acidogenic substances of precipitation in Xincheng District of Nanchang City are neutralized by alkaline substances in the atmosphere with relative acidity of 0.43% and 57.0%, and the main acidity neutralization factors are Ca2 and NH4. The neutralization amounts of 50.0% and 36.6% were contributed respectively. The anion was mainly from artificial sources according to the anion triangulation. The enrichment coefficient analysis shows that 99.5% of Ca2 ~ (88. 4%) and 63.0% of Mg2 are from crustal sources. The ocean source input of Mg2 K ~ + Ca ~ (2 +) was 30.7% and 0.5%, respectively. In 1.2%, 55.8% of Cl- from crustal sources came from oceanic sources and 43.0% from anthropogenic sources. 96.8% of so _ 42- and 99.5% of no _ 3- came from artificial sources. The study shows that the precipitation in Xincheng District of Nanchang City is a mixed type of precipitation, and the anthropogenic sources have an important impact on the atmospheric environment.
【正文快照】： 第 29 卷 第 11 期 2016 年 11 月 環(huán) 境 科 學(xué) 研 究 Ｒesearch of Environmental Sciences Vol． 29 ， No． 11 Nov． ，， 2016 收稿日期: 2016-05-04 修訂日期: 2016-07-18 基金項(xiàng)目: 國(guó)家自然科學(xué)基金項(xiàng)目( 41265009 ) 作者簡(jiǎn)介: 魏

本文編號(hào)：1441997