The Analysis of the Chemical Composition of Precipitation During the Driest Year from the Last Decade

Present Environment and Sustainable Development

Nita Ion-Andrei¹  Deák György²  Bodor Zsolt³  Tonk Szende⁴  Bodor Katalin⁵  Keresztesi Ágnes⁵  Boga Réka⁵ 

[1] Alexandru Ioan Cuza University, Bulevardul Carol I 11, 700506, Iași, Romania;National Institute for Research and Development in Environmental Protection, Splaiul Independenţei 294, 6th District, 060031 Bucharest, Romania;Sapientia Hungarian University of Transylvania, Faculty of Economics, Socio - Human Science and Engineering, Department of Bioengineering, Piaţa Libertăţii 1, 530104, Miercurea Ciuc, Romania;Sapientia Hungarian University of Transylvania, Faculty of Sciences and Arts, Calea Turzi 4, 400193, Cluj Napoca, Romania;University of Pécs, Faculty of Natural Sciences, Doctoral School of Chemistry, Ifjúság 6, 7624 Pécs, Hungary;

关键词: precipitation chemistry;    ionic composition;    acid neutralization;    source contribution;    Principal Component Analysis (PCA);   

DOI  :  10.2478/pesd-2019-0002

来源: DOAJ

【 摘 要 】

In order to investigate the precipitation chemistry, studies were carried out from January 2013 to December 2013 in Odorheiu Secuiesc and Miercurea Ciuc, Eastern Carpathians, Romania. During a period of eleven years (2006 – 2016), 2013 was the driest year. The rainwater samples were analyzed for pH, major anions and cations. HCO3− concentrations were calculated based on the empirical relationship between pH and HCO3−. NH4+, Ca2+, SO42− were the dominant ions in precipitation at both sites. The pH values varied from 6.75 to 7.46 Miercurea Ciuc, and from 6.69 to 7.67 in Odorheiu Secuiesc. The neutralization was mainly brought by Ca2+ and NH4+. Estimated ratios of sea-salt fraction (SSF), non-sea-salt fraction (NSSF), and results from Spearman’s rank correlation and Principal Component Analysis (PCA), showed that the acidic ions (SO42−, NO3−) were derived from anthropogenic activities, NH4+ from soil fertilization, while Ca2+, Mg2+, K+ originated from terrestrial source. These influence the precipitations ionic content, especially during droughts. Spatial variations and the rim effect of the Eastern Carpathians on precipitation chemistry is also shown.

【 授权许可】

Unknown