caa a22 4500 475823400 CHVBK 20180406123824.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1023/A:1006421624865 doi (NATIONALLICENCE)springer-10.1023/A:1006421624865 Temporal Variability of Iron Speciation in Coastal Rainwater [Elektronische Daten] [Joan Willey, Robert Kieber, Kelly Williams, Jamie Crozier, Stephen Skrabal, G. Brooks Avery Jr.] Iron occurs in rain as particulateand dissolved Fe and includes both Fe(II) and Fe(III)species. Model calculations and correlation analysisindicate Fe(II)(aq) occurs almost exclusively as thefree ion whereas Fe(III)(aq) occurs as both ironoxalate and Fe(OH)2 +(aq) with largevariations over the pH range from 4.0 to 5.0. Complexation with humic-like compounds may also beimportant for Fe(III)(aq); however, the concentrationand structural characteristics of these compounds haveyet to be determined. 112 rain samples were collectedfor iron analysis in Wilmington, North Carolina,between 1 July 1997, and 30 June 1999. Total iron,particulate iron and Fe(III)(aq) were higher inconcentration in summer and spring rain relative towinter and autumn rain. Fe(II)(aq) concentrations, incontrast, did not vary seasonally. Particulate iron,which was approximately half the total rainwater iron,was highest between noon and 6 p.m. (EST), probably dueto more intense regional convection including land-seabreezes during that time. The ratio ofFe(II)(aq)/Fe(III)(aq) was also highest in rainreceived between noon and 6 p.m., which most likelyreflects photochemical reduction of Fe(III)(aq)complexes to form Fe(II)(aq). A conceptual modeldepicting the interplay between iron species, lightintensity and organic ligands in rainwater ispresented. Kluwer Academic Publishers, 2000 atmospheric chemistry nationallicence rain nationallicence precipitation nationallicence iron nationallicence oxalate nationallicence speciation nationallicence season nationallicence diurnal nationallicence photochemistry nationallicence Willey Joan Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A. aut Kieber Robert Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A. aut Williams Kelly Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A. aut Crozier Jamie Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A. aut Skrabal Stephen Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A. aut Brooks Avery Jr. G. Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A. aut Journal of Atmospheric Chemistry Kluwer Academic Publishers 37/2(2000-10-01), 185-205 0167-7764 37:2<185 2000 37 10874 https://doi.org/10.1023/A:1006421624865 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1006421624865 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Willey Joan Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A aut NATIONALLICENCE 700 1- Kieber Robert Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A aut NATIONALLICENCE 700 1- Williams Kelly Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A aut NATIONALLICENCE 700 1- Crozier Jamie Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A aut NATIONALLICENCE 700 1- Skrabal Stephen Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A aut NATIONALLICENCE 700 1- Brooks Avery Jr G. Department of Chemistry and Marine Science Program, University of North Carolina at Wilmington, 28403-3297, Wilmington, North Carolina, U.S.A aut NATIONALLICENCE 773 0- Journal of Atmospheric Chemistry Kluwer Academic Publishers 37/2(2000-10-01), 185-205 0167-7764 37:2<185 2000 37 10874 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer