Stimulation of oxalate root exudate in arsenic speciation and fluctuation with phosphate and iron in anoxic mangrove sediment
Copyright © 2023. Published by Elsevier Ltd..
Mutual transformations of rhizospheric arsenic (As) in pollution-prone mangrove sediments affected by root exudate oxalate were simulated. This study focuses on the effect of oxalate on As release, mobilization, and phase speciation associated with P and Fe was examined under anoxic conditions in time-dependent changes. Results showed that oxalate addition significantly facilitated As-Fe-P release from As-contaminated mangrove sediments. Sediment As formed the adsorptive and the carbonate-binding fractionations, facilitating the re-adsorption processes. Solution As and As5+ correlated with NaOH-P positively but with NaHCO3-P and HCl-P negatively. Dominant Fe3+ (>84 %) from the amorphous Fe regulated suspension changes and then time-dependent co-precipitation with As and P. Sediment P formed strong complexes with Fe oxides and could be substituted for As via STEM analysis. Oxalate ligand exchange, competitive adsorption of oxalate, and Fe-reduced dissolution are confirmed to involve, allowing for an insight As/P/Fe mobilization and fate in mangrove wetland.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:189 |
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| Enthalten in: |
Marine pollution bulletin - 189(2023) vom: 02. Apr., Seite 114823 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Mei, Kang [VerfasserIn] |
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| Links: |
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| Themen: |
Arsenic |
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| Anmerkungen: |
Date Completed 28.03.2023 Date Revised 28.03.2023 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.marpolbul.2023.114823 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM354365568 |
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| 245 | 1 | 0 | |a Stimulation of oxalate root exudate in arsenic speciation and fluctuation with phosphate and iron in anoxic mangrove sediment |
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| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2023. Published by Elsevier Ltd. | ||
| 520 | |a Mutual transformations of rhizospheric arsenic (As) in pollution-prone mangrove sediments affected by root exudate oxalate were simulated. This study focuses on the effect of oxalate on As release, mobilization, and phase speciation associated with P and Fe was examined under anoxic conditions in time-dependent changes. Results showed that oxalate addition significantly facilitated As-Fe-P release from As-contaminated mangrove sediments. Sediment As formed the adsorptive and the carbonate-binding fractionations, facilitating the re-adsorption processes. Solution As and As5+ correlated with NaOH-P positively but with NaHCO3-P and HCl-P negatively. Dominant Fe3+ (>84 %) from the amorphous Fe regulated suspension changes and then time-dependent co-precipitation with As and P. Sediment P formed strong complexes with Fe oxides and could be substituted for As via STEM analysis. Oxalate ligand exchange, competitive adsorption of oxalate, and Fe-reduced dissolution are confirmed to involve, allowing for an insight As/P/Fe mobilization and fate in mangrove wetland | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Competitive adsorption | |
| 650 | 4 | |a Mutual transformations | |
| 650 | 4 | |a Oxalate ligand exchange | |
| 650 | 4 | |a Reduced dissolution | |
| 650 | 4 | |a Rhizospheric interactions | |
| 650 | 7 | |a Iron |2 NLM | |
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| 650 | 7 | |a Phosphates |2 NLM | |
| 700 | 1 | |a Liu, Jingchun |e verfasserin |4 aut | |
| 700 | 1 | |a Xue, Liyang |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Jicong |e verfasserin |4 aut | |
| 700 | 1 | |a Jiang, Wanlin |e verfasserin |4 aut | |
| 700 | 1 | |a Tan, Zhiwen |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Anran |e verfasserin |4 aut | |
| 700 | 1 | |a Qu, Jinyi |e verfasserin |4 aut | |
| 700 | 1 | |a Yan, Chongling |e verfasserin |4 aut | |
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