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Spatial and temporal dynamics of heavy metal pollution and source identification in sediment cores from the short-term flooding riparian wetlands in a Chinese delta.
Environ Pollut. 2016 Dec; 219:379-388.EP

Abstract

Sediment samples were collected to a depth of 60 cm along a 350-m sampling belt in a short-term-flooding riparian wetland in the Yellow River Delta of China in three sampling seasons. Contents of heavy metals were determined to investigate their spatial and temporal distributions, sources and ecotoxities. Our results showed that As contents in the top 20 cm sediments increased before decreasing along the sampling belt in summer, whereas they kept stable before increasing in fall and spring. Cd contents increased along the sampling belt in three sampling seasons, whereas Ni and Cr generally exhibited a decreasing tendency. Comparatively, Cu, Pb and Zn consistently increased at the first 50 m distance and then decreased before increasing from the distance of 150 m in summer and fall and increased to the maximum at the distance of 250 m and then showed a decrease in spring. Two "hotspots" of heavy metal accumulation in sediment cores along the belt were observed at the distance from 50 to 100 m in summer and at the distance from 200 to 300 m in spring. Most of sediment samples contained higher heavy metals in excess of threshold effect levels except for Zn and Pb in three sampling seasons and the values of toxic units in more than 30% of sediment samples exceeded 4 in summer. As, Ni and Cr had relatively higher contribution to the values of toxic units compared with other heavy metals in three sampling seasons. Multivariance analysis showed that As and Cd might originate from the same source and Cu, Zn, Cr, Pb and Ni might derive from another similar source. Cd was significantly correlated with salinity (p < 0.01) and pH (p < 0.05). Meanwhile, these heavy metals were also significantly correlated with other properties such as S, Al, TP, SOM and Silt + Clay.

Authors+Show Affiliations

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. Electronic address: junhongbai@163.com.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27209339

Citation

Bai, Junhong, et al. "Spatial and Temporal Dynamics of Heavy Metal Pollution and Source Identification in Sediment Cores From the Short-term Flooding Riparian Wetlands in a Chinese Delta." Environmental Pollution (Barking, Essex : 1987), vol. 219, 2016, pp. 379-388.
Bai J, Jia J, Zhang G, et al. Spatial and temporal dynamics of heavy metal pollution and source identification in sediment cores from the short-term flooding riparian wetlands in a Chinese delta. Environ Pollut. 2016;219:379-388.
Bai, J., Jia, J., Zhang, G., Zhao, Q., Lu, Q., Cui, B., & Liu, X. (2016). Spatial and temporal dynamics of heavy metal pollution and source identification in sediment cores from the short-term flooding riparian wetlands in a Chinese delta. Environmental Pollution (Barking, Essex : 1987), 219, 379-388. https://doi.org/10.1016/j.envpol.2016.05.016
Bai J, et al. Spatial and Temporal Dynamics of Heavy Metal Pollution and Source Identification in Sediment Cores From the Short-term Flooding Riparian Wetlands in a Chinese Delta. Environ Pollut. 2016;219:379-388. PubMed PMID: 27209339.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Spatial and temporal dynamics of heavy metal pollution and source identification in sediment cores from the short-term flooding riparian wetlands in a Chinese delta. AU - Bai,Junhong, AU - Jia,Jia, AU - Zhang,Guangliang, AU - Zhao,Qingqing, AU - Lu,Qiongqiong, AU - Cui,Baoshan, AU - Liu,Xinhui, Y1 - 2016/05/18/ PY - 2016/03/01/received PY - 2016/04/20/revised PY - 2016/05/08/accepted PY - 2016/5/23/pubmed PY - 2017/2/25/medline PY - 2016/5/23/entrez KW - Ecotoxicity KW - Heavy metals KW - Multivariance analysis KW - Riparian wetlands KW - Spatial distribution KW - Temporal dynamic SP - 379 EP - 388 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 219 N2 - Sediment samples were collected to a depth of 60 cm along a 350-m sampling belt in a short-term-flooding riparian wetland in the Yellow River Delta of China in three sampling seasons. Contents of heavy metals were determined to investigate their spatial and temporal distributions, sources and ecotoxities. Our results showed that As contents in the top 20 cm sediments increased before decreasing along the sampling belt in summer, whereas they kept stable before increasing in fall and spring. Cd contents increased along the sampling belt in three sampling seasons, whereas Ni and Cr generally exhibited a decreasing tendency. Comparatively, Cu, Pb and Zn consistently increased at the first 50 m distance and then decreased before increasing from the distance of 150 m in summer and fall and increased to the maximum at the distance of 250 m and then showed a decrease in spring. Two "hotspots" of heavy metal accumulation in sediment cores along the belt were observed at the distance from 50 to 100 m in summer and at the distance from 200 to 300 m in spring. Most of sediment samples contained higher heavy metals in excess of threshold effect levels except for Zn and Pb in three sampling seasons and the values of toxic units in more than 30% of sediment samples exceeded 4 in summer. As, Ni and Cr had relatively higher contribution to the values of toxic units compared with other heavy metals in three sampling seasons. Multivariance analysis showed that As and Cd might originate from the same source and Cu, Zn, Cr, Pb and Ni might derive from another similar source. Cd was significantly correlated with salinity (p < 0.01) and pH (p < 0.05). Meanwhile, these heavy metals were also significantly correlated with other properties such as S, Al, TP, SOM and Silt + Clay. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/27209339/Spatial_and_temporal_dynamics_of_heavy_metal_pollution_and_source_identification_in_sediment_cores_from_the_short_term_flooding_riparian_wetlands_in_a_Chinese_delta_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(16)30395-5 DB - PRIME DP - Unbound Medicine ER -