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| Main Authors: | , , , , , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Marine environmental research
2025
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/40737986/ |
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| _version_ | 1868266171980054528 |
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| author | Ni, Zhixin Chen, Xin Zhang, Minxia Li, Tuanjie Chen, Changshu Wang, Yuru Lyu, Yihua Peng, Xiaojuan Dang, Aicui Wang, Zhongyuan Ye, Jianping |
| author_facet | Ni, Zhixin Chen, Xin Zhang, Minxia Li, Tuanjie Chen, Changshu Wang, Yuru Lyu, Yihua Peng, Xiaojuan Dang, Aicui Wang, Zhongyuan Ye, Jianping Ni, Zhixin Chen, Xin Zhang, Minxia Li, Tuanjie Chen, Changshu Wang, Yuru Lyu, Yihua Peng, Xiaojuan Dang, Aicui Wang, Zhongyuan Ye, Jianping |
| collection | PubMed - marine biology |
| contents | Hydrodynamics and soluble organic matter regulated the availability of heavy metals in sediment in the Pearl River estuary. Ni, Zhixin Chen, Xin Zhang, Minxia Li, Tuanjie Chen, Changshu Wang, Yuru Lyu, Yihua Peng, Xiaojuan Dang, Aicui Wang, Zhongyuan Ye, Jianping Hydrodynamics Rivers Metals, Heavy Water Pollutants, Chemical Estuaries Geologic Sediments Environmental Monitoring The Pearl River Estuary (PRE), a subtropical estuary, specially known for the developed economy and a dense population in China, has been subjected to serious anthropogenic inputs. This work was performed in the PRE with intensive dynamics in the dry season to study the availability of heavy metals (HMs) in the sediment and the influencing factors. The four chemical fractions of HMs were determined and the results showed that high available concentrations and potential environmental risk occurred to most HMs with the order of Mn > Zn > Pb > Cu > Cr > Ni > Co > As > Cd. Meanwhile, hydrodynamics and soluble organic matters (SOM) in sediment exerted important impacts on HM available forms closely related with their ecological risk. It was observed during seawater mixing with freshwater in the dry season most available metals decreased and thus their hazardous risk was actually suppressed, which may be attributed to the possible transformation of the acid-soluble fraction metals towards other chemical species on the weak alkaline situation. Terrestrial fulvic acid with relatively higher humification degree and the anthropogenic tyrosine-like component SOM may exert the positive impact on most exchangeable HM due to their strong complexation to metals through forming organometallic complexes in sediment and generated temporary bioavailability of metals, preventing their rapid transformation into insoluble species. This study was meaningful to further understand the transformation and the hazardous risk mechanisms of HMs in the estuarine/coastal environments. |
| format | Artículo científico |
| id | pubmed_40737986 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | Marine environmental research |
| record_format | pubmed |
| spellingShingle | Hydrodynamics and soluble organic matter regulated the availability of heavy metals in sediment in the Pearl River estuary. Ni, Zhixin Chen, Xin Zhang, Minxia Li, Tuanjie Chen, Changshu Wang, Yuru Lyu, Yihua Peng, Xiaojuan Dang, Aicui Wang, Zhongyuan Ye, Jianping Hydrodynamics Rivers Metals, Heavy Water Pollutants, Chemical Estuaries Geologic Sediments Environmental Monitoring Hydrodynamics and soluble organic matter regulated the availability of heavy metals in sediment in the Pearl River estuary. Ni, Zhixin Chen, Xin Zhang, Minxia Li, Tuanjie Chen, Changshu Wang, Yuru Lyu, Yihua Peng, Xiaojuan Dang, Aicui Wang, Zhongyuan Ye, Jianping Hydrodynamics Rivers Metals, Heavy Water Pollutants, Chemical Estuaries Geologic Sediments Environmental Monitoring The Pearl River Estuary (PRE), a subtropical estuary, specially known for the developed economy and a dense population in China, has been subjected to serious anthropogenic inputs. This work was performed in the PRE with intensive dynamics in the dry season to study the availability of heavy metals (HMs) in the sediment and the influencing factors. The four chemical fractions of HMs were determined and the results showed that high available concentrations and potential environmental risk occurred to most HMs with the order of Mn > Zn > Pb > Cu > Cr > Ni > Co > As > Cd. Meanwhile, hydrodynamics and soluble organic matters (SOM) in sediment exerted important impacts on HM available forms closely related with their ecological risk. It was observed during seawater mixing with freshwater in the dry season most available metals decreased and thus their hazardous risk was actually suppressed, which may be attributed to the possible transformation of the acid-soluble fraction metals towards other chemical species on the weak alkaline situation. Terrestrial fulvic acid with relatively higher humification degree and the anthropogenic tyrosine-like component SOM may exert the positive impact on most exchangeable HM due to their strong complexation to metals through forming organometallic complexes in sediment and generated temporary bioavailability of metals, preventing their rapid transformation into insoluble species. This study was meaningful to further understand the transformation and the hazardous risk mechanisms of HMs in the estuarine/coastal environments. |
| title | Hydrodynamics and soluble organic matter regulated the availability of heavy metals in sediment in the Pearl River estuary. |
| topic | Hydrodynamics Rivers Metals, Heavy Water Pollutants, Chemical Estuaries Geologic Sediments Environmental Monitoring |
| url | https://pubmed.ncbi.nlm.nih.gov/40737986/ |