Effect of Hg in Jiaozhou Bay Waters - Land Transfer Process

Yang, Dong; Zhu, Si Xi; Wang, Feng You; Yang, Xiu Qin

doi:10.4028/www.scientific.net/amr.955-959.2496

Cited by 23 publications

(7 citation statements)

References 6 publications

(10 reference statements)

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“…As the rainy season was going on, the remaining Hg in land surface and river bed was decreasing, and the content and flux of Hg to waters and ocean were also decreasing in summer in July 1988. The seasonal variations of Hg contents in 1988 were consistent with other years during 1979-1986 [1][2][3][4][5][6][7][8][9][10][11], that was Hg contents in surface waters weer relative high in spring, and were relative low in summer, and were lowest in autumn. That was the seasonal variation's mechanism of Hg, and was also the terrestrial migration mechanism.…”

Section: Seasonal Variation's Mechanism Of Hgsupporting

confidence: 66%

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Seasonal Variation Mechanism of Hg in Jiaozhou Bay 1988

Yang¹,

Wang²,

Tao³

et al. 2018

Proceedings of the 2017 4th International Conference on Machinery, Materials and Computer (MACMC 2017)

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This paper analyzed the vertical distribution and seasonal variation of Hg in waters in Jiaozhou Bay in 1988. Results showed that Hg contents in surface and bottom waters were in order of spring >summer. In case of Hg contents were relative high/low in surface waters, Hg contents in bottom waters were also relative high/low. The continuous sediment of Hg resulted in dilution and accumulation effects in bottom waters. The relative high Hg contents resulted in dilution effect in bottom waters, while the relative low Hg contents resulted in accumulation effect in bottom waters. The seasonal variations of Hg contents in surface waters were determined by the changes of the major Hg sources, while the corresponding seasonal variations of Hg contents in bottom waters were results of accumulation effect and dilution effect of waters.The distributions of Hg contents in surface and bottom waters were reverse in case of the input and sedimentation of Hg was just beginning, yet were consistent when the input and sedimentation of Hg had been on-going for a time period. Finally, the mechanism of seasonal variation mechanism and terrestrial migration mechanism were proposed.

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Section: Seasonal Variation's Mechanism Of Hgsupporting

confidence: 66%

“…The terrestrial anthropogenic Hg was discharged to soil, air and waters, and was transported to ocean finally by means of overland runoff, river flow and atmospheric deposition [4][5][6][7][8]. In general, the existence and change of Hg in marine bay are results of the terrestrial Hg's input and rainfall-runoff, in a large part .…”

Section: Introductionmentioning

confidence: 99%

Seasonal Variation Mechanism of Hg in Jiaozhou Bay 1988

Yang¹,

Wang²,

Tao³

et al. 2018

Proceedings of the 2017 4th International Conference on Machinery, Materials and Computer (MACMC 2017)

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“…When marine oil spills occur, petroleum (PHC) will take the source of the marine oil spill as the center, forming a high-content area of PHC, and spreading around diminishingly. In this way, the ocean current transports the PHC content to the entire bay waters [1][2][3][4][5][6][7][8]. Based on the survey data in 1993, this paper analyzes the horizontal distribution and source of PHC in the waters of Jiaozhou Bay, studies the migration process of PHC content under the action of ocean currents, and determines the changing process of PHC content in the waters of Jiaozhou Bay, which provides scientific theoretical basis for the protection of the marine environment and the maintenance of ecological sustainable development.…”

Section: Introductionmentioning

confidence: 99%

Migration and changing law of PHC content under the action of ocean current

Yang

et al. 2021

E3S Web Conf.

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According to the survey dataset of the waters of Jiaozhou Bay in May 1993, this paper studies the migration and changing process of PHC content caused by marine oil spill in the waters of Jiaozhou Bay. In May, take the center of eastern waters, H3107, as the source of marine oil spill, where PHC content is 51.00μg/L. Then a series of concentric circles with different gradients are formed with H3107 station as the center. The PHC content decreases from the high content of 51.00μg/L in the center to the surroundings along the gradient, to 4.16μg/L in the waters of bay mouth, 31.60μg/L in the central waters of the bay, 27.00μg/L in the northern waters, and 48.40μg/L in the northeast waters. According to the horizontal absolute loss rate model of material content, it can be calculated that the value of horizontal absolute loss rate of PHC content in the surface layer of the water body from the eastern center to the bay mouth in May is calculated to be 0.44 Yang Dongfang absolute number; to the central waters of the bay, 0.13 Yang Dongfang absolute number; to the northern waters of the bay, 0.33 Yang Dongfang absolute number; to the northeastern waters of the bay, 0.06 Yang Dongfang absolute number. According to the horizontal relative loss rate model of material content, it is calculated that in May, from the eastern central waters to the waters of bay mouth, the horizontal relative loss rate of PHC content in the surface layer of water body is 8.67 Yang Dongfang relative number; to the central waters of the bay, 2.72 Yang Dongfang relative number; to the northern waters of the bay, 6.47 Yang Dongfang relative number; to the northeastern waters of the bay, 1.33 Yang Dongfang relative number. Therefore, taking H3107, the central point in the eastern part of Jiaozhou Bay, as the source of marine oil spills, its PHC content decreases to the surroundings, whose horizontal absolute loss rate is within 0.06–0.44 Yang Dongfang absolute number and the horizontal relative loss rate is within 1.33–8.67 Yang Dongfang relative number. The order of the horizontal absolute (relative) loss rate of PHC content from low to high is: waters in the northeast of the bay < waters in the bay center < waters in the north of the bay < waters in the bay mouth. The Yang Dongfang horizontal loss rate model of material content reveals the migration and changing law of PHC content during the process of ocean current carrying PHC content: 1) In the downstream direction of the ocean current, the PHC content decreases at the slowest rate, and its loss is the smallest during the migration process. In the countercurrent direction of the ocean current, the PHC content declines the fastest, and the loss is greatest during the migration process. 2) In the downstream direction of the ocean current, as the migration distance continues to increase, the PHC content continues to decline and its loss is gradually increasing during the migration process. 3) In waters where the ocean current does not pass, the PHC content decreases slowly, and the PHC content reaches a relatively high value. During the migration process, its loss is relatively small. The PHC content reaches the waters where the ocean current does not pass, and the loss content is between the loss of the PHC content carried by the ocean current in the downstream direction and the upstream direction.

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“…With the release of large amounts of Hg from land to the environment by many industries, Hg content has appeared on land, atmosphere, and oceans. The pollution degree and source of Hg content in the coastal waters has become everyone's concern [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Based on the survey data in 1993, the author studied the content, horizontal distribution and sources of Hg in the water body of Jiaozhou Bay.…”

Section: Introductionmentioning

confidence: 99%

The land surface mildly contaminated by Hg

Yang

Ding

et al. 2021

E3S Web Conf.

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The Hg content in the waters of Jiaozhou Bay was within 0.010-0.060μg/L in May, September and October 1993, which conforms to the seawater quality standards of Class I and II. It indicates that in the entire waters of Jiaozhou Bay, there were some water areas that did not get contaminated by Hg while some areas got mild contamination by Hg in May, September and October. In May, the variation range of Hg content in the waters of Jiaozhou Bay was 0.010-0.046μg/L. In September, it ranged within 0.007-0.011μg/L. And in October, the content of Hg detected in the waters of Jiaozhou Bay was 0.060μg/L. There were three sources to transport Hg content, open sea currents, Licun river and the surface runoff. The Hg content from the transportation of open sea currents was 0.046μg/L, from the Licun river was 0.011μg/L and from the surface runoff was 0.060μg/L. This paper builds a model block diagram to present the different paths and Hg contents that were input in the Jiaozhou Bay. In May, the open sea currents did not get any contamination of Hg; in August, the Licun river did not get any contamination of Hg as well; while in September, the surface runoff was mildly contaminated by Hg. The author concluded two points about the migration of Hg content: 1) Human activities discharge Hg to the land so that the Hg content could directly run to the ocean through the surface runoff. As the Hg content transported by surface runoff was relatively high, it resulted that the nearshore waters got mild contamination of Hg content. On the other hand, the surface runoff transported Hg to rivers, resulting relatively low content of Hg. Then rivers delivered the Hg content to nearshore waters, leading to a non-contaminated condition of rivers. 2) Human activities input Hg content to the ocean in a long period, resulting the increase of Hg content in the ocean. As the accumulation of Hg content in the ocean, the ocean got close to the mild contamination status.

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Effect of Hg in Jiaozhou Bay Waters - Land Transfer Process

Cited by 23 publications

References 6 publications

Seasonal Variation Mechanism of Hg in Jiaozhou Bay 1988

Seasonal Variation Mechanism of Hg in Jiaozhou Bay 1988

Migration and changing law of PHC content under the action of ocean current

The land surface mildly contaminated by Hg

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