Trace metal pollution and carbon and nitrogen isotope tracing through the Yongdingxin River estuary in Bohai Bay, Northern China

Sun, Conghui; Wei, Qi; Ma, Lixin; Li, Li; Wu, Guowei; Pan, Ling

doi:10.1016/j.marpolbul.2016.10.066

Cited by 15 publications

(2 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, residues and decaying matter of aquatic plants (e.g., algae, reeds, and Typha) are considered the two main sources of SOM in the Beidagang Wetland Nature Reserve. The TOC/TN values in this study range from 6.66 to 22.60 (average: 12.00±3.62) and are significantly higher than those calculated in a previous study (range: 6.73 to 9.78; average: 7.73±0.750) of the Yongdingxin River estuary (ANOVA, p = 0.001) [ 25 ]. Thus, higher TOC/TN values may reflect lower anthropogenic inputs in the Beidagang Wetland Nature Reserve compared to the Yongdingxin River estuary.…”

Section: Resultscontrasting

confidence: 72%

“…Results show that δ 13 C values in the Beidagang Wetland Nature Reserve sediments range from –24.8 ‰ to –18.7‰ (average: –21.2±2.38‰), significantly higher than the range –23.7 ‰ to –22.5‰ previously reported for the Yongdingxin River estuary sediments (average: –23.1±0.35‰) (ANOVA, p = 0.001)[ 25 ]. If δ 13 C values are in the range –22‰ to –16‰, organic matter could be from a mixture of terrigenous and aquatic components.…”

Section: Resultsmentioning

confidence: 93%

See 1 more Smart Citation

Trace metals, organic carbon and nutrients in the Beidagang Wetland Nature Reserve, northern China

et al. 2018

Self Cite

View full text Add to dashboard Cite

This study aimed to determine sediment contamination in the Beidagang Wetland Nature Reserve to describe atmospheric deposition of trace metals. We analyzed Hg, Cd, Pb, TOC, TN, TP, δ13C, and δ15N, and studied their variations in surface sediments and in the vertical profiles of sediment cores collected from the reserve. Evaluation of environmental trace metal contamination using sediment quality guidelines and geochemical background values indicated that the risk of metal pollution in the reserve sediments was relatively low. Concentrations of Hg, Cd, and Pb in the sediments were much lower than concentrations in sediment samples from Bohai Bay and polluted rivers in Tianjin. Enrichment factors indicate that samples are moderately contaminated with Hg, Cd, and Pb; whereas the geo-accumulation index results classify the sediments as uncontaminated to moderately contaminated with Hg, Cd, and Pb. The distribution patterns of trace metal concentrations in the three core samples were uniform. δ13C and δ15N were used to track the sources of TOC and TN in sediments. Results show that TOC mainly originated from the residue and decaying matter of aquatic plants (e.g., algae, reeds, and Typha), while TN was derived from soil N and elevated atmospheric N deposition. Because domestic and industrial waste is not discharged into the Beidagang Wetland Nature Reserve, trace metals found in sediments mainly originate from atmospheric deposition. The results provide baseline data for analysis of trace metal accumulation in Beijing-Tianjin-Hebei, a region subject to atmospheric deposition in northern China.

show abstract

Section: Resultscontrasting

confidence: 72%

Section: Resultsmentioning

confidence: 93%