Coral-inferred historical changes of nickel emissions related to industrial and transportation activities in the Beibu Gulf, northern South China Sea

Wu, Xingyuan; Jiang, Wei; Yu, Kefu; Xu, Shendong; Yang, Haodan; Wang, Ning; Wei, Chaoshuai; Chen, Feng; Sun, Yinan; Xie, Sirong

doi:10.1016/j.jhazmat.2021.127422

Cited by 10 publications

(2 citation statements)

References 60 publications

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“…According to our previous research (Wu et al, 2022), the coral Ni/Ca ratios during the P2 period (1994 were relatively low and stable, which is lower than worldwide average (∼8.2 nmol/kg). Before 1994, exploration, production, and transportation in oilfields near the WZI had a great impact on the heavy metal contents; after 2008 CE, there were several oil spills in the region, with the development and operation of the Beibu Gulf Economic Zone.…”

Section: Methodsmentioning

confidence: 77%

High‐Resolution Coral Records of Cadmium in Surface Seawater: Biogeochemical Cycling and a Novel Proxy for Winter Monsoon

Sun

Jiang

et al. 2022

Geochem Geophys Geosyst

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Cadmium (Cd) is a toxic trace metal element, which can be transferred or accumulated through the food chain, and is one of the elements that must be measured in marine monitoring (Jurado-González et al., 2003). The behavior and distribution of Cd in the seawater are similar to that of macro-nutrient, being biologically depleted in surface seawater (Xu et al., 2008) and enriched at depth through dissolution of sinking organic matter (Boyle et al., 1976;Bruland et al., 1978), forming a scavenged depth profile of nutrient types (Grottoli et al., 2013). Cd is also considered as a micro-nutrient associated with a carbonic anhydrase that is ubiquitous in the bacteria, plants and animal kingdoms (Lionetto et al., 2005). Some researches suggested that Cd was an essential trace metal element in phytoplankton (Lane & Morel, 2000;Lane et al., 2005), but others suggested that Cd was non-specifically exploited by phytoplankton and stored intracellularly to avoid toxicity (Horner et al., 2013). Whichever mechanism may explain the nutrient-like behavior of Cd, its strong correlation with phosphate reflects its involvement in biological cycling processes (Delgadillo-Hinojosa et al., 2015). However, the geochemical Abstract Cadmium (Cd) geochemical cycle plays a significant role in the composition and function of the marine ecosystem. Skeletal cadmium-to-calcium (Cd/Ca) ratios in hermatypic corals have been applied to reconstruct the historical changes of oceanic and climatic processes, yet there was no systematic evaluation of this tracer's natural variability in high resolution over time. Here, we reported a coral skeletal Cd/Ca record in monthly resolution from 1999 to 2008 CE and reconstructed the history of Cd contents in surface seawater in the northern South China Sea. A significant seasonal variation (higher in the winter but lower in the summer) of Cd contents in surface seawater can be identified. We found that the seasonal variations in coral skeletal Cd/ Ca ratios exhibited significant trends coupled with the surface wind speeds, indicating that strong winds had likely driven the vertical seawater mixing process and then induced the process of sediment remobilization on the shelf, which significantly increased Cd contents in surface seawater. The reduction in Cd contents in surface seawater due to biological processes might be masked by the impacts of surface winds. Importantly, we also observed that coral skeletal Cd/Ca records in the winter showed significant correlations with the winter monsoon index, highlighting the possibility as a new proxy of winter monsoon in the non-upwelling shelf environments.Plain Language Summary Cadmium (Cd) is a nutrient element absorbed by phytoplankton in surface seawater, showing a distribution of low surface content and high bottom content. In order to determine the seasonal variations of Cd content in surface seawater in the northern South China Sea, we analyzed the coral skeletal Cd/Ca ratios in monthly resolution (1999 and finally concluded that the process of sediment resuspens...

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Section: Methodsmentioning

confidence: 77%

High‐Resolution Coral Records of Cadmium in Surface Seawater: Biogeochemical Cycling and a Novel Proxy for Winter Monsoon

Sun

Jiang

et al. 2022

Geochem Geophys Geosyst

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“…The most detrimental anthropogenic sources are generally associated with the combustion process of various types of fuels, for example, industrial activities and vehicular traffic. Industrial activities as a stationary source with equipment and facilities, such as power generation, automotive production, food processing, clothing, and other production (S. Wu et al., 2021 ), contribute greatly to climate change. Vehicular traffic as a non-stationary source, such as public and private transportation, contributes to gas emissions ( Yu et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Microclimate investigation of vehicular traffic on the urban heat island through IoT-Based device

Husni

Prayoga

Tamba

et al. 2022

Heliyon

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Biomonitoring of polycyclic aromatic hydrocarbons, heavy metals, and plasticizers residues: role of bees and honey as bioindicators of environmental contamination

Fiore

Cristofaro

Nuzzo

et al. 2023

Environ Sci Pollut Res

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Coral-inferred historical changes of nickel emissions related to industrial and transportation activities in the Beibu Gulf, northern South China Sea

Cited by 10 publications

References 60 publications

High‐Resolution Coral Records of Cadmium in Surface Seawater: Biogeochemical Cycling and a Novel Proxy for Winter Monsoon

High‐Resolution Coral Records of Cadmium in Surface Seawater: Biogeochemical Cycling and a Novel Proxy for Winter Monsoon

Microclimate investigation of vehicular traffic on the urban heat island through IoT-Based device

Biomonitoring of polycyclic aromatic hydrocarbons, heavy metals, and plasticizers residues: role of bees and honey as bioindicators of environmental contamination

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