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The effects of road salt application on the accumulation and speciation of cations and anions in an urban environment
Author(s) -
Merrikhpour Hajar,
Jalali Mohsen
Publication year - 2013
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.2012.00371.x
Subject(s) - environmental chemistry , salt (chemistry) , sulfate , pollution , environmental science , genetic algorithm , phosphate , chloride , sea salt , chemistry , contamination , environmental engineering , aerosol , ecology , organic chemistry , biology
This study aimed to assess the quality of road runoff in heavy traffic and residential areas of Hamedan province, in the western region of Iran. To investigate the effects of salt pollution, 14 runoff samples were collected from streets during the winter and spring of 2009. Streets received different amounts of deicing salt depending on the traffic density. Results showed that deicing salt has major affects on sodium ( N a + ), calcium ( C a 2+ ), magnesium ( M g 2+ ), chloride ( C l − ), bicarbonate (HCO 3 − ), sulfate (SO 4 2 −) and phosphate (PO 4 3 −) pollution. This is important because this type of watercourse contamination can lead to serious problems, such as eutrophication. We also found an increase in lead ( P b 2+ ) concentration, which was not attributable to the application of deicing agents, but that was due to the combustion of leaded gasoline. Speciation of C a, M g, P b and P chemical species in the samples was calculated using V isual M inteq 2.6 program. The results indicated that C a and M g were mainly present as free ions, P b was mainly present as PbCO 3 (aq), while the dominant P species wereHPO 4 2 −andH 2PO 4 − .