Heavy metal distribution in different soil aggregate size classes from restored brackish marsh, oil exploitation zone, and tidal mud flat of the Yellow River Delta

Xiao, Rong; Zhang, Mingxiang; Yao, Xinying; Ma, Zhiwei; Yu, Fei‐Hai; Bai, Junhong

doi:10.1007/s11368-015-1274-4

Cited by 73 publications

(24 citation statements)

References 41 publications

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“…The results of Pearson correlation analysis showed that Cu and Zn correlated significantly with clay and silt ( < 0.05, Table 3). The concentrations of heavy metals in sediments increase with decreasing particle because the fine-grained sediments tend to adsorb much more heavy metals due to their high specific surface area [50,51]. The fine particles were markedly observed in the western Caofeidian and the central Bohai Bay compared with the Laolongou and the cape of Caofeidian (Figure 2).…”

Section: Factors Controlling the Distribution Of Heavy Metalsmentioning

confidence: 99%

Spatial Distribution and Contamination Assessment of Heavy Metals in Surface Sediments of the Caofeidian Adjacent Sea after the Land Reclamation, Bohai Bay

Zhu

Bing

Huang

et al. 2018

Journal of Chemistry

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Land reclamation can significantly influence spatial distribution of heavy metals in inshore sediments. In this study, the distribution and contamination of heavy metals (Cd, Cr, Cu, Ni, Pb, and Zn) in inshore sediments of Bohai Bay were investigated after the land reclamation of Caofeidian. The results showed that the concentrations of Cd, Cr, Cu, Ni, Pb, and Zn in the sediments were 0. 20-0.65, 27.16-115.70, 11.14-39.00, 17.37-65.90, 15.08-24.06, and 41.64-139.56 mg/kg, respectively. These metal concentrations were generally higher in the area of Caofeidian than in other Chinese bays and estuaries. Spatially, the concentrations of Cd, Cr, Cu, Ni, and Zn were markedly lower in the sediments close to Caofeidian compared with other regions, whereas the concentrations of Pb showed an opposite case. Hydrodynamic conditions after the land reclamation were the major factor influencing the distribution of heavy metals in the sediments. Grain sizes dominated the distribution of Cu and Zn, and organic matters and Fe/Mn oxides/hydroxides also determined the distribution of the heavy metals. Multiple contamination indices showed that the inshore sediments were moderately to highly contaminated by Cd and slightly contaminated by other heavy metals. Similarly, Cd showed a high potential ecorisk in the sediments, and other metals were in the low level. Chromium contributed to higher exposure toxicity than other metals by the toxicity unit and toxic risk index. The results of this study indicate that after the land reclamation of Caofeidian the contamination and ecorisk of heavy metals in the sediments markedly decreased in the stronger hydrodynamic areas.

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Section: Factors Controlling the Distribution Of Heavy Metalsmentioning

confidence: 99%

Spatial Distribution and Contamination Assessment of Heavy Metals in Surface Sediments of the Caofeidian Adjacent Sea after the Land Reclamation, Bohai Bay

Zhu

Bing

Huang

et al. 2018

Journal of Chemistry

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“…Furthermore, the major factors influencing the speciation distribution of trace metals in soils also include the soil physico‐chemical characteristics (pH, organic matter, redox potential, oxide content, etc.) and environmental factors (temperature, hydrology) . The Pearson correlation indicated that the soil pH has a significant negative relation with the oxidizable fraction of Cu and the acid soluble fractions of Zn and Pb (Table ).…”

Section: Discussionmentioning

confidence: 99%

Effects of Planting Patterns on Trace Metals in Soils Following Wetland Restoration

Zhang

Deng

et al. 2018

CLEAN Soil Air Water

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To understand the effects of planting patterns on trace metal fractions in degraded wetland soils in the Jinjiang Estuary, the chemical speciation of trace metals (Cu, Cr, Zn, and Pb) before and after wetland restoration is analyzed based on a measurement and testing program. The results show that wetland restoration, in general, increases the ratios of Cu, Cr, Zn, and Pb in the acid‐soluble fraction and the ratios of Cr, Zn, and Pb in the residual fraction and decreases the ratios of Cr, Zn, and Pb in the reducible fraction and the ratios of Cu, Cr, Zn, and Pb in the oxidizable fraction; thus, the mobility of Cu increases, and the mobility of Cr, Zn, and Pb decreases. Moreover, the planting patterns influence the levels of Cu, Cr, Zn, and Pb to some extent. After wetland restoration, the levels of Cu show an upward trend, and the Pb levels exhibit a downward trend. However, the potential ecological risk of Cu, Cr, Zn, and Pb fail to decrease. The restoration time may have been too short. The results of this study indicate that the planting patterns influence the transformation of trace metal fractions in soil and affect the pollution degree and potential ecological risk, contributing to a better understanding of the effects of planting patterns on trace metals following wetland restoration. The results will be helpful for subsequent scientific research on wetland restoration.

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“…Rapid industrialization and economic development have caused serious heavy metal pollution, especially in coastal areas. [1][2][3] Crude oil pollution, seawater intrusion, overexploitation and other problems have aggravated heavy metal pollution in the Yellow River delta wetland, 4 which leads to wetland and vegetation degradation, biodiversity decline and destruction of the original ecological structure. [5][6][7][8] It is urgent to solve the threat to the ecosystem and biological population caused by the increase of the heavy metal concentration in the Yellow River delta wetland.…”

Section: Introductionmentioning

confidence: 99%

Impact of heavy metals on Ciconia boyciana feathers and Larus saundersi egg shells in the Yellow River delta estuary

Yang

Zhang

et al. 2020

RSC Adv.

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Heavy metal distribution in different soil aggregate size classes from restored brackish marsh, oil exploitation zone, and tidal mud flat of the Yellow River Delta

Cited by 73 publications

References 41 publications

Spatial Distribution and Contamination Assessment of Heavy Metals in Surface Sediments of the Caofeidian Adjacent Sea after the Land Reclamation, Bohai Bay

Spatial Distribution and Contamination Assessment of Heavy Metals in Surface Sediments of the Caofeidian Adjacent Sea after the Land Reclamation, Bohai Bay

Effects of Planting Patterns on Trace Metals in Soils Following Wetland Restoration

Impact of heavy metals on Ciconia boyciana feathers and Larus saundersi egg shells in the Yellow River delta estuary

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