Impact of iron-organic matter complexes on aqueous phosphate concentrations
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- 作者：Anneli Sundmana ; 1 ; anneli.sundman@ifg.uni-tuebingen.de" class="auth_mail" title="E-mail the corresponding author ; Torbjö ; rn Karlssona ; tka8933@gmail.com" class="auth_mail" title="E-mail the corresponding author ; Staffan Sjö ; berga ; staffan.sjoberg@umu.se" class="auth_mail" title="E-mail the corresponding author ; Per Perssonb ; per.persson@biol.lu.se" class="auth_mail" title="E-mail the corresponding author
- 关键词：Iron ; Phosphate ; Organic matter ; X-ray absorption spectroscopy
- 刊名：Chemical Geology
- 出版年：2016
- 出版时间：15 May 2016
- 年：2016
- 卷：426
- 期：Complete
- 页码：109-117
- 全文大小：1322 K
文摘
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Stable Fe(III)–organic matter (OM) complexes prevent interactions with phosphate.
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A mechanistic and thermodynamic model describing the ternary P(V)–Fe(III)–OM system is proposed.
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The model predicts that increased OM concentrations lead to increased aqueous phosphate concentrations.
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Balance between formation of Fe(III)–OM complexes and Fe(III) (hydr)oxides plays a decisive role for phosphate sequestration.