Distribution Characteristics and Controlling Factors of Soluble Heavy Metals in the Yellow River Estuary and Adjacent Sea

Tang, Aikun; Liu, Ruhai; M, Liu; Xu, Liaoqi; Wang, Jinyu

doi:10.1016/j.proenv.2010.10.129

Cited by 68 publications

(25 citation statements)

References 3 publications

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“…Compared with other marine areas of China, the concentrations of As, Cd, Cu, Hg, Pb and Zn in the seawaters of the Yellow River Estuary and its surrounding marine area were lower than those of the heavily anthropogenically influenced Jiaozhou Bay, comparable with those of the Yangtze River Estuary and the Hangzhou Bay, but higher than those of some marginal seas such as the North Yellow Sea, the South Yellow Sea and the South China Sea (Cui et al, 1997;He et al, 2008;Ling, 2010 …”

Section: The Situation Of the Yellow River Estuary And Its Surroundinmentioning

confidence: 99%

Pollution status of the Bohai Sea: An overview of the environmental quality assessment related trace metals

Gao

Zhou

Chen

2014

Environment International

338

170

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It is well recognized that the ecosystem of the Bohai Sea is being rapidly degraded and the Sea has basically lost its function as a fishing ground. Billions of funds have been spent in slowing down, halting and finally reversing the environmental deterioration of the Bohai Sea. Although trace metals are routinely monitored, the data with high temporal resolution for a clear understanding of biogeochemical processes in the ecosystem of the Bohai Sea are insufficient, especially in the western literature. In this review, status of trace metal contamination in the Bohai Sea is assessed based on a comprehensive review of their concentrations recorded in the waters, sediments and organisms over the past decades. Studies show that metal contamination in the Bohai Sea is closely associated with the fast economic growth in the past decades. Concentrations of trace metals are high in coastal areas especially in the estuaries. Alarmingly high metal concentrations are observed in the waters, sediments and organisms from the western Bohai Bay and the northern Liaodong Bay, especially the coasts near Huludao in the northernmost area of the Bohai Sea, which is being polluted by industrial sewage from the surrounding areas. The knowledge of the speciation and fractionation of trace metals and the influence of submarine groundwater discharge on the biogeochemistry of trace metals in the Bohai Sea is far from enough and related work needs to be done urgently to get a better understanding of the influence of trace metals on the ecosystem of the Bohai Sea. A clear understanding of the trace metal pollution status of the Bohai Sea could not be achieved presently for lack of systematic cooperation in different research fields. It is quite necessary to apply the environmental and ecological modeling to the investigation of trace metals in the Bohai Sea and then provide foundations for the protection of the environment and ecosystem of the Bohai Sea.

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Section: The Situation Of the Yellow River Estuary And Its Surroundinmentioning

confidence: 99%

Pollution status of the Bohai Sea: An overview of the environmental quality assessment related trace metals

Gao

Zhou

Chen

2014

Environment International

338

170

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“…The concentrations in the new wetlands are relatively higher (Tang et al 2010;Bai et al 2012). Table 1 shows that the mean As and Ni concentrations have small variations (the variation coefficient is 22.69 %) than the concentrations of other heavy metals.…”

Section: Heavy Metal Concentrationsmentioning

confidence: 96%

“…Moreover, Cd could be defined as an exogenous metal because it is found at high levels after the salinity decreased. Tang et al (2010) reported that higher Cd concentrations in seawater of the YRD were primarily affected by YR inputs. Because of upstream rapid agricultural development, heavy applications of agrochemicals and fertilizers have contributed to the large increase in heavy metal concentrations in the YRD.…”

Section: Principal Component Analysis (Pca)mentioning

confidence: 99%

Comparison of arsenic and heavy metals contamination between existing wetlands and wetlands created by river diversion in the Yellow River estuary, China

et al. 2014

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Samples were collected at 71 sites in the Yellow River Delta Natural Reserve in December 2010 to represent soil conditions before and after the Yellow River (YR) diversion. The As, Cd, Cu, Pb, Zn, and Ni concentrations were measured to determine metal contamination levels. Results suggest that Cd concentrations were significantly higher after the YR diversion than before. The As, Cd, Cr, Cu, Ni, Pb, and Zn soil contamination indices did not exceed contamination levels, although the heavy metal content increased after the YR diversion. The mean concentrations of these heavy metals were lower than the Class I criteria. Correlation analysis shows significant correlations between As and Cr, Cu, Ni, Pb, and Zn concentrations both before and after the YR diversion. However, no significant correlations were observed between heavy metal concentration and pH before the diversion, and no heavy metal concentration was correlated with salinity. The principal component analysis indicates that these trace elements, including As, were closely correlated with each other and therefore likely originated from shared pollution sources before the diversion. These results are useful for assessing the heavy metal contamination and proposing feasible suggestions to improve soil quality.

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“…The quality of water is the most important factor affecting live in the ecosystem. Lakes and rivers being important fresh water sources are polluted by natural and anthropogenic sources (4). Heavy metals are present in these natural and anthropogenic sources, and estimation of the HMs in these systems is essential to ease the burden of pollution (5).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Seasonal Physico-Chemical Parameters of Oguta Lake, Nigeria.

L.N

Nwoko

Egereonu

et al. 2016

JAC

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Seasonal variation of physico-chemical variables of Oguta Lake, Nigeria was studied. Results obtained using standard analytical methods indicated that in the rainy and dry seasons (July and August) and (October and November), 2014, iron (Fe; 1.401 mg/l in November) was the overall metal observed in the lake, while mercury (Hg) was not detected throughout the period of study. Heavy metals concentrations observed were higher (not significantly) during the dry than the rainy season. The values observed for dissolved oxygen (DO), biological and chemical oxygen demand (BOD and COD) were within WHO permissible limits. The above evidence revealed that there was signs of heavy metal (Fe) pollution of the lake, and steps must be taken for constant monitoring of anthropogenic inputs into the lake.

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Distribution Characteristics and Controlling Factors of Soluble Heavy Metals in the Yellow River Estuary and Adjacent Sea

Cited by 68 publications

References 3 publications

Pollution status of the Bohai Sea: An overview of the environmental quality assessment related trace metals

Pollution status of the Bohai Sea: An overview of the environmental quality assessment related trace metals

Comparison of arsenic and heavy metals contamination between existing wetlands and wetlands created by river diversion in the Yellow River estuary, China

Assessment of Seasonal Physico-Chemical Parameters of Oguta Lake, Nigeria.

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