Cargando…

Capacity of humic substances to complex with iron at different salinities in the Yangtze River estuary and East China Sea

The iron binding capacities (IBC) of fulvic acid (FA) and humic acid (HA) were determined in the salinity range from 5 to 40. The results indicated that IBC decreased while salinity increased. In addition, dissolved iron (dFe), FA and HA were also determined along the Yangtze River estuary’s increas...

Descripción completa

Detalles Bibliográficos
Autores principales: Yang, Rujun, Su, Han, Qu, Shenglu, Wang, Xuchen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431113/
https://www.ncbi.nlm.nih.gov/pubmed/28469240
http://dx.doi.org/10.1038/s41598-017-01533-6
_version_ 1783236367955787776
author Yang, Rujun
Su, Han
Qu, Shenglu
Wang, Xuchen
author_facet Yang, Rujun
Su, Han
Qu, Shenglu
Wang, Xuchen
author_sort Yang, Rujun
collection PubMed
description The iron binding capacities (IBC) of fulvic acid (FA) and humic acid (HA) were determined in the salinity range from 5 to 40. The results indicated that IBC decreased while salinity increased. In addition, dissolved iron (dFe), FA and HA were also determined along the Yangtze River estuary’s increasing salinity gradient from 0.14 to 33. The loss rates of dFe, FA and HA in the Yangtze River estuary were up to 96%, 74%, and 67%, respectively. The decreases in dFe, FA and HA, as well as the change in IBC of humic substances (HS) along the salinity gradient in the Yangtze River estuary were all well described by a first-order exponential attenuation model: y(dFe/FA/HA, S) = a(0) × exp(kS) + y(0). These results indicate that flocculation of FA and HA along the salinity gradient resulted in removal of dFe. Furthermore, the exponential attenuation model described in this paper can be applied in the major estuaries of the world where most of the removal of dFe and HS occurs where freshwater and seawater mix.
format Online
Article
Text
id pubmed-5431113
institution National Center for Biotechnology Information
language English
publishDate 2017
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-54311132017-05-16 Capacity of humic substances to complex with iron at different salinities in the Yangtze River estuary and East China Sea Yang, Rujun Su, Han Qu, Shenglu Wang, Xuchen Sci Rep Article The iron binding capacities (IBC) of fulvic acid (FA) and humic acid (HA) were determined in the salinity range from 5 to 40. The results indicated that IBC decreased while salinity increased. In addition, dissolved iron (dFe), FA and HA were also determined along the Yangtze River estuary’s increasing salinity gradient from 0.14 to 33. The loss rates of dFe, FA and HA in the Yangtze River estuary were up to 96%, 74%, and 67%, respectively. The decreases in dFe, FA and HA, as well as the change in IBC of humic substances (HS) along the salinity gradient in the Yangtze River estuary were all well described by a first-order exponential attenuation model: y(dFe/FA/HA, S) = a(0) × exp(kS) + y(0). These results indicate that flocculation of FA and HA along the salinity gradient resulted in removal of dFe. Furthermore, the exponential attenuation model described in this paper can be applied in the major estuaries of the world where most of the removal of dFe and HS occurs where freshwater and seawater mix. Nature Publishing Group UK 2017-05-03 /pmc/articles/PMC5431113/ /pubmed/28469240 http://dx.doi.org/10.1038/s41598-017-01533-6 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Yang, Rujun
Su, Han
Qu, Shenglu
Wang, Xuchen
Capacity of humic substances to complex with iron at different salinities in the Yangtze River estuary and East China Sea
title Capacity of humic substances to complex with iron at different salinities in the Yangtze River estuary and East China Sea
title_full Capacity of humic substances to complex with iron at different salinities in the Yangtze River estuary and East China Sea
title_fullStr Capacity of humic substances to complex with iron at different salinities in the Yangtze River estuary and East China Sea
title_full_unstemmed Capacity of humic substances to complex with iron at different salinities in the Yangtze River estuary and East China Sea
title_short Capacity of humic substances to complex with iron at different salinities in the Yangtze River estuary and East China Sea
title_sort capacity of humic substances to complex with iron at different salinities in the yangtze river estuary and east china sea
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5431113/
https://www.ncbi.nlm.nih.gov/pubmed/28469240
http://dx.doi.org/10.1038/s41598-017-01533-6
work_keys_str_mv AT yangrujun capacityofhumicsubstancestocomplexwithironatdifferentsalinitiesintheyangtzeriverestuaryandeastchinasea
AT suhan capacityofhumicsubstancestocomplexwithironatdifferentsalinitiesintheyangtzeriverestuaryandeastchinasea
AT qushenglu capacityofhumicsubstancestocomplexwithironatdifferentsalinitiesintheyangtzeriverestuaryandeastchinasea
AT wangxuchen capacityofhumicsubstancestocomplexwithironatdifferentsalinitiesintheyangtzeriverestuaryandeastchinasea