Contamination and ecological risk assessment of heavy metals, and relationship with organic matter sources in surface sediments of the Cross River Estuary and nearshore areas

Dan，Solomon Felix1; Udoh，Enobong Charles2; Wang，Qianqian3

2022-09-15

10.1016/j.jhazmat.2022.129531

JOURNAL OF HAZARDOUS MATERIALS   Impact Factor & Quartile

0304-3894

1873-3336

Chemical speciation of heavy metals (Zn, Pb, Cu, and Cd) was studied to evaluate the contamination status and associated risks and to constrain the sources of heavy metals in relation to sedimentary organic matter (OM) sources in surface sediments of the Cross River Estuary (CRE) and nearshore areas surrounded by a degrading mangrove ecosystem (typical C plants). The contamination factor (CF) and geo-accumulation (I) indicated that Cd and Zn were the most polluted heavy metals. High percentages of Zn (63.78%), Pb (64.48%), Cd (76.72%) and the considerable amount of Cu (48.57%) in non-residual fractions indicated that these heavy metals are bioavailable. Cd showed moderate to high ecological and bioavailability risk based on the ecological risk (E) and risk assessment code (RAC). Significant positive correlations occurred among the heavy metals, fine-grained sediments, and sedimentary OM from terrestrial C sources. These correlations, together with high percentages of heavy metals in the oxidizable fraction (~33–50%), indicated that the erosive washout of OM and fine sediments ladened with heavy metals from the adjoining degraded mangrove ecosystem contributed significantly to the increased contents of heavy metals in surface sediments of the study area.

Contamination status Heavy metals Mangrove-dominated estuary Sedimentary organic matter Sources

SCI ; EI

English

Others

Guangxi Science and Technology Base and Talents Special Project[AD21220148] ; Scientific Research Startup Fund of Beibu Gulf University[2020KYQD01]

Engineering ; Environmental Sciences & Ecology

Engineering, Environmental ; Environmental Sciences

WOS:000831125800002

ELSEVIER

20222912359562

Biogeochemistry ; Cadmium ; Chemical speciation ; Contamination ; Ecosystems ; Organic compounds ; Risk assessment ; River pollution ; Sedimentology ; Zinc

Waterways:407.2 ; Water Pollution:453 ; Ecology and Ecosystems:454.3 ; Geology:481.1 ; Geochemistry:481.2 ; Zinc and Alloys:546.3 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Biochemistry:801.2 ; Chemical Reactions:802.2 ; Organic Compounds:804.1 ; Accidents and Accident Prevention:914.1

ENGINEERING

2-s2.0-85133930110

Scopus

1.Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf,Beibu Gulf University,Qinzhou,535011,China
2.State Key Laboratory of Marine Geology,Tongji University,Shanghai,200092,China
3.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Dan，Solomon Felix,Udoh，Enobong Charles,Wang，Qianqian. Contamination and ecological risk assessment of heavy metals, and relationship with organic matter sources in surface sediments of the Cross River Estuary and nearshore areas[J]. JOURNAL OF HAZARDOUS MATERIALS,2022,438.

Dan，Solomon Felix,Udoh，Enobong Charles,&Wang，Qianqian.(2022).Contamination and ecological risk assessment of heavy metals, and relationship with organic matter sources in surface sediments of the Cross River Estuary and nearshore areas.JOURNAL OF HAZARDOUS MATERIALS,438.

Dan，Solomon Felix,et al."Contamination and ecological risk assessment of heavy metals, and relationship with organic matter sources in surface sediments of the Cross River Estuary and nearshore areas".JOURNAL OF HAZARDOUS MATERIALS 438(2022).