Application of equilibrium partitioning model to assess the metal toxicity in sediments of Bohai Bay and Laizhou Bay

Li Li; Wang Xiaojing; Bai Yazhi; Sun Yi; Liu Jihua

doi:10.3969/j.issn.0253-4193.2015.02.008

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Article Navigation > Haiyang Xuebao > 2015 > 37(2): 75-84

Li Li, Wang Xiaojing, Bai Yazhi, Sun Yi, Liu Jihua. Application of equilibrium partitioning model to assess the metal toxicity in sediments of Bohai Bay and Laizhou Bay[J]. Haiyang Xuebao, 2015, 37(2): 75-84. doi: 10.3969/j.issn.0253-4193.2015.02.008

Citation:

Li Li, Wang Xiaojing, Bai Yazhi, Sun Yi, Liu Jihua. Application of equilibrium partitioning model to assess the metal toxicity in sediments of Bohai Bay and Laizhou Bay[J]. Haiyang Xuebao, 2015, 37(2): 75-84. doi: 10.3969/j.issn.0253-4193.2015.02.008

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Application of equilibrium partitioning model to assess the metal toxicity in sediments of Bohai Bay and Laizhou Bay

doi: 10.3969/j.issn.0253-4193.2015.02.008

1.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266061
2.
Qingdao City Sewage Monitoring Station, Qingdao 266002, China

Received Date: 2014-04-22
Rev Recd Date: 2014-10-29

Abstract

Abstract

In order to assess the metal toxicity in sediments in Bohai Sea, seventy-two surface sediment samples have been collected in Bohai Bay and Laizhou Bay. The acid volatile sulfide (AVS), simultaneously extracted metals (SEM) and total organic carbon (TOC) were determined, and the equilibrium partitioning model (EqP Mode) were applied to assess the sediment toxicity. The results showed that, eight stations have exceeded the toxicity threshold of the EqP Model, indicating potential metal toxicity in sediments, while 61% stations were in absence of toxicity. Meanwhile, the total (bulk) metal content has also been determined and several empirical sediment quality guidelines (SQGs) were applied to assess the quality of the sediments. Although the Cu, Ni and Cr concentrations at some stations exceeded the SQGs, the SQGs, however, may not be suitable for use in the Bohai Sea owing to the background concentrations. In the end, it is concluded that the EqP Model is a more effective method to assess the metal bioavailability and toxicity in sediments, especially for the Chinese nearshore sediments, which may contain relatively low TOC and AVS concentrations and therefore result higher metal toxicity. The EqP Model should be paid more attention and applied more often to assess the sediment metal toxicity in China.
- acid volatile sulfide,
- equilibrium partitioning model,
- heavy metals,
- toxicity,
- Bohai Bay,
- Laizhou Bay

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References(37)

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