Coral-inferred historical changes of nickel emissions related to industrial and transportation activities in the Beibu Gulf, northern South China Sea.
Coral-inferred historical changes of nickel emissions related to industrial and transportation activities in the Beibu Gulf, northern South China Sea.
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DOI：
10.1016/j.jhazmat.2021.127422
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发表时间：
2021-10
影响因子：
13.6
通讯作者：
Xingyuan Wu;Wei Jiang;Kefu Yu;Shendong Xu;Haodan Yang;Ning Wang;Chaoshuai Wei;Chun-Cheng Feng;Yinan Sun;Sirong Xie
中科院分区：
文献类型：
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作者：
Xingyuan Wu;Wei Jiang;Kefu Yu;Shendong Xu;Haodan Yang;Ning Wang;Chaoshuai Wei;Chun-Cheng Feng;Yinan Sun;Sirong Xie
作为重油中含量最丰富的金属之一，镍受到了工业和交通活动的显著影响，以至于人为的镍排放改变了自然的地球化学过程。珊瑚Ni/Ca已成为表征海洋污染的可靠指标，但这一潜力尚未被用于突出石油污染。在此，我们利用高分辨率的地球化学参数(Ni/Ca、δ~(18)O和δ~(13)C)对1984年至2015年间南海北部中国海岛表层海水中Ni的分布模式进行了重建。珊瑚的Ni/Ca比值波动较小，但在1984~1993年期间出现了多个突变峰(0.20±0.42)μ/Mol。从1994年到2008年，这一比率一直较低且稳定(0.10±0.09μμ/摩尔)，然后迅速上升，从2009年到2015年变化显著(1.60±44.56摩尔/摩尔)。珊瑚的镍/钙比值捕捉到了所有重要的镍排放，这表明它有可能记录石油泄漏事件。镍贡献的历史变化表明，工业和交通活动应对人为投入的变化负责。石油的泄漏和消耗可能是镍的主要排放源。
As one of the most abundant metals in heavy oils, Ni has suffered so notably increasing impacts from industrial and traffic activities that anthropogenic Ni emissions have altered natural geochemical processes. The coral Ni/Ca has become a reliable proxy for characterizing marine pollution, but this potential has been unexploited for highlighting oil pollution. Here, we utilized a high-resolution record of geochemical parameters (Ni/Ca, δ18O, and δ13C) in aPoritescoral of an offshore island in the northern South China Sea to reconstruct of Ni distribution patterns in surface seawater from 1984 to 2015. The coral Ni/Ca ratios exhibit minor fluctuations, except for multiple mutation peaks (0.20 ± 0.42 μmol/mol) during the period from 1984 to 1993. The ratio was low and stable (0.10 ± 0.09 μmol/mol) from 1994 to 2008, and then increased rapidly with significant variations (1.60 ± 4.56 μmol/mol) from 2009 to 2015. The coral Ni/Ca ratios captured all significant Ni discharges, and this demonstrates its potential for recording oil spill episodes. The historical variations in the contributions of Ni indicate that industrial and traffic activities should be responsible for changes in the anthropogenic input. The leaks and consumptions of petroleum likely account for the primary Ni emission sources.