Seasonal variations in spatial distribution, mobilization kinetic and toxicity risk of arsenic in sediments of Lake Taihu, China
Copyright © 2023 Elsevier B.V. All rights reserved..
This study investigated seasonal variations in spatial distribution, mobilization kinetic and toxicity risk of arsenic (As) in sediments of three representative ecological lakes in Lake Taihu. Results suggested that the bioavailability and mobility of As in sediments depended on the lake ecological types and seasonal changes. At the algal-type zones and macrophyte-type zones, elevated As concentrations were observed in April and July, while these occurred at the transition areas in July and October. The diffusion flux of soluble As ranged from 0.03 to 3.03 ng/cm2/d, indicating sediments acted as a source of As. Reductive dissolution of As-bearing iron/manganese-oxides was the key driver of sediment As remobilization. However, labile S(-II) caused by the degradations of algae and macrophytes buffered sediment As release at the algal-type and macrophyte-type zones. Furthermore, the resupply ratio was less than 1 at three ecological lakes, indicating the resupply As capacity of sediment solid phase was partially sustained case. The risk quotient values were higher than 1 at the algal-type zones and transition areas in July, thereby, the adverse effects of As should not be ignored. This suggested that it is urgently need to be specifically monitored and managed for As contamination in sediments across multi-ecological lakes.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:463 |
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| Enthalten in: |
Journal of hazardous materials - 463(2024) vom: 05. Jan., Seite 132852 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Wang, Shuhang [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 22.11.2023 Date Revised 02.01.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.jhazmat.2023.132852 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM363824464 |
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| 245 | 1 | 0 | |a Seasonal variations in spatial distribution, mobilization kinetic and toxicity risk of arsenic in sediments of Lake Taihu, China |
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| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2023 Elsevier B.V. All rights reserved. | ||
| 520 | |a This study investigated seasonal variations in spatial distribution, mobilization kinetic and toxicity risk of arsenic (As) in sediments of three representative ecological lakes in Lake Taihu. Results suggested that the bioavailability and mobility of As in sediments depended on the lake ecological types and seasonal changes. At the algal-type zones and macrophyte-type zones, elevated As concentrations were observed in April and July, while these occurred at the transition areas in July and October. The diffusion flux of soluble As ranged from 0.03 to 3.03 ng/cm2/d, indicating sediments acted as a source of As. Reductive dissolution of As-bearing iron/manganese-oxides was the key driver of sediment As remobilization. However, labile S(-II) caused by the degradations of algae and macrophytes buffered sediment As release at the algal-type and macrophyte-type zones. Furthermore, the resupply ratio was less than 1 at three ecological lakes, indicating the resupply As capacity of sediment solid phase was partially sustained case. The risk quotient values were higher than 1 at the algal-type zones and transition areas in July, thereby, the adverse effects of As should not be ignored. This suggested that it is urgently need to be specifically monitored and managed for As contamination in sediments across multi-ecological lakes | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Ecotoxicological risk assessment | |
| 650 | 4 | |a Mobilization kinetics | |
| 650 | 4 | |a Multi-ecological lakes | |
| 650 | 4 | |a Sediment as contamination | |
| 650 | 4 | |a Spatiotemporal patterns | |
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| 650 | 7 | |a Water Pollutants, Chemical |2 NLM | |
| 700 | 1 | |a Ding, Shiming |e verfasserin |4 aut | |
| 700 | 1 | |a Zhao, Hanbin |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Musong |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Dianhai |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Cai |e verfasserin |4 aut | |
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