scholarly journals Mercury’s source input paths to Jiaozhou Bay

2018 ◽  
Vol 175 ◽  
pp. 04019
Author(s):  
Dongfang Yang ◽  
Dongmei Jing ◽  
Yuan Zhang ◽  
Xiaolong Zhang ◽  
Haixia Li
Keyword(s):  
Surface Waters ◽  
River Discharge ◽  
Block Diagram ◽  
Jiaozhou Bay ◽  
Pollution Level ◽  
Pollution Levels ◽  
Marine Current

This paper analyzed the source input paths of mercury (Hg) in Jiaozhou Bay using investigation data in surface waters in April, July and October 1989. Results showed that Hg contents in surface waters in the whole year ranged from 0.002-0.449 μg L-1, and in April, July and October were 0.035-0.449 μg L-1, 0.002-0.059 μg L-1 and 0.002-0.028 μg L-1, respectively. The pollution levels of Hg in April, July and October were moderate, slight and little, respectively. River discharge, atmosphere deposition and marine current were the three major Hg sources, whose source strengths were 0.026-0.449 μg L-1, 0.059 μg L-1 and 0.026-0.028 μg L-1, and the pollution levels were moderate, slight and little, respectively. In general, the pollution level of Hg in surface waters in Jiaozhou Bay were mainly determined by source inputs. Furthermore, a block diagram model was provided to demonstrate the input paths of Hg to Jiaozhou Bay.

scholarly journals Source and fate of plumbum in marine bay

2018 ◽  
Vol 175 ◽  
pp. 04020
Author(s):  
Dongfang Yang ◽  
Dong Lin ◽  
Xiaolong Zhang ◽  
Qi Wang ◽  
Haixia Li
Keyword(s):  
Surface Waters ◽  
River Discharge ◽  
Environmental Remediation ◽  
Rapid Development ◽  
Eastern China ◽  
Jiaozhou Bay ◽  
Shandong Province ◽  
Pollution Levels ◽  
Source To Sink ◽  
Overland Runoff

Many marine bays bave been polluted by Plumbum (Pb) due to the rapid development of industry and the swift increasing of economic, and therefore understanding the source and fate of Pb is essential to environmental remediation in marine bays. This paper analyzed the source and fate of Pb in Jiaozhou Bay, Shandong Province, eastern China in 1989. Results showed that Pb contents in surface waters in April, July and October 1989 were 5.56-12.59 μg L-1, 1.73-15.17 μg L-1 and 0.50-11.57 μg L-1, and the pollution levels were heavy, moderate and slight/moderate, respectively. The major sources of Pb in this bay were atmosphere deposition, overland runoff and river discharge, and their source strengths were 15.17 μg L-1, 12.59 μg L-1 and 11.57-12.06 μg L-1, respectively. The three source input processes were defined that the longer migration processes, the larger loss of substance’s contents. Furthermore, fate of Pb from source to sink was also defined. These migration processes were demonstrated by two block diagrams, which were helpful to better understand the source and fate of Pb in marine bay.

scholarly journals Collaborative influence of river discharge and marine current on PHC in Jiaozhou Bay

2019 ◽  
Vol 218 ◽  
pp. 012148
Author(s):  
Dongfang Yang ◽  
Dong Lin ◽  
Yuan Zhang ◽  
Qi Wang ◽  
Haixia Li
Keyword(s):  
River Discharge ◽  
Jiaozhou Bay ◽  
Marine Current

scholarly journals The consistency of Arsenic’s high value regions in surface and bottom waters in Jiaozhou Bay

2018 ◽  
Vol 38 ◽  
pp. 01026
Author(s):  
Dongfang Yang ◽  
Jianxun Chai ◽  
Xiaoye Gao ◽  
Yunjie Wu ◽  
Sixi Zhu
Keyword(s):  
Surface Waters ◽  
Water Body ◽  
Coastal Waters ◽  
Jiaozhou Bay ◽  
Pollution Level ◽  
Wet Season ◽  
Guide Line ◽  
Sea Bottom ◽  
Bottom Waters ◽  
Overland Runoff

This paper analyzed the contents and distributions of As in Jiaozhou Bay in 1982. Results showed that As’s contents in bottom waters in coastal waters in the southwest of the bay and the bay mouth in Jiaozhou Bay in July and October 1982 were 0.88-4.48 μg L-1 and 0.84-1.16 μg L-1, respectively. As’s contents were much lower than the guide line of Grade I, and the pollution level of As in bottom waters in Jiaozhou Bay in 1982 was still very slight. There was high value region in coastal waters in the southwest of the bay in July 1982 (4.48 μg L-1), while in October 1982 high value region was in the bay mouth (1.16 μg L-1). The source input of As from overland runoff in the southwest was strong in July, resulted in relative high value region in surface waters in coastal waters in the southwest of the bay, and therefore resulted in high value region in bottom waters in same region by means of rapid sedimentation of As. October was wet season and there was little As input to the bay, resulted in low As’s contents in surface waters, as well as bottom waters. At any time, the terrigenous As was foremost transported to surface waters, and was subsided to sea bottom through water body by vertical water’s effect. Hence, the high value regions of As’s contents in surface and bottom waters had characteristic of consistency in Jiaozhou Bay.

Research on the Source of Cu in Jiaozhou Bay

2015 ◽  
Vol 1092-1093 ◽  
pp. 1013-1016 ◽  
Author(s):  
Dong Fang Yang ◽  
Zhen Qing Miao ◽  
Wen Peng Song ◽  
Zi Jun Xu ◽  
Xiao Geng
Keyword(s):  
Surface Waters ◽  
Content Distribution ◽  
Jiaozhou Bay ◽  
Ocean Current ◽  
Pollution Level ◽  
Overland Runoff

This paper analyzed the content, distribution and source of Cu in Jiaozhou Bay in 1982. Results showed that the Cu contents in surface waters were relatively low, and the pollution level of Cu in 1982 was very slight. The major Cu source in the southwest of the bay was overland runoff; while for the northeast ocean current was responsible. The input contents of overland runoff and ocean current ranged from 2.22-3.56 μg.L-1 and 0.15-5.31μg.L-1, respectively.

scholarly journals Cd Content with an Always High Vertical Diluted Amount

2020 ◽  
Vol 198 ◽  
pp. 01009
Author(s):  
Dongfang Yang ◽  
Xinmin Huang ◽  
Tao Jiang ◽  
Linzhen Wei ◽  
Shengjun Zhang
Keyword(s):  
Surface Layer ◽  
Block Diagram ◽  
Jiaozhou Bay ◽  
Bottom Layer ◽  
Matter Content ◽  
Change Model ◽  
The West ◽  
Horizontal Migration ◽  
Sea Current ◽  
Vertical Changes

Based on the investigation data about Cd in Jiaozhou Bay in August 1992 and the horizontal change model of matter content and the vertical change model of matter content proposed by the authors, the horizontal loss amount, vertical diluted amount and vertical sediment amount of Cd content in the surface and bottom layers from the southeast waters of the bay to the west waters of the bay mouth were calculated, and the model block diagram of the horizontal and vertical changes of Cd content was determined. The results show that in August, the absolutely loss amount of Cd content in the surface layer was 0.09μg/L, and the absolutely increase amount of Cd content in the bottom layer was 0.10μg/L. The relatively loss amount of Cd content in the surface layer was 12.00%, and the relatively increase amount of Cd content in the bottom layer was 41.66%. Cd content in the surface and bottom layershadabsolutely vertical diluted amount of 0.42-0.61μg/L, and its relatively vertical diluted amount was 63.63-81.33%. In August, in the horizontal migration of Cd content in the surface and bottom layers, the main sea current carried high Cd content in the surface waters.And after passing through the nearshore waters of the bay, one tenth of the Cd content in the surface layer settled to the seabed. In the horizontal migration process of Cd content in the surface layer, the loss amount of Cd content in the surface layer reached 12.00% in the nearshore waters around Jiaozhou Bay, thus the increase amount of Cd content in the bottom layer reached 41.66%. It reveals that the high Cd content in the surface layer could rapidly and continuously sink to the seabed, and the Cd content in the seabed waters in Jiaozhou Bay increased by 41.66%. In August, in the process of vertical migration, the Cd content transported by main sea current was relatively high, and the vertical diluted amount of Cd content in the surface and bottom layers was high 63.63 - 81.33% from the southeast waters of the bay to the waters in the west of the bay mouth.

The Variation of the Contents of Pb in Surface Waters in Jiaozhou Bay

2014 ◽  
Vol 651-653 ◽  
pp. 1492-1495 ◽  
Author(s):  
Dong Fang Yang ◽  
Hong Guang Ge ◽  
Feng Min Song ◽  
Chen Li ◽  
Bo Yang
Keyword(s):  
Surface Waters ◽  
Sea Water ◽  
Jiaozhou Bay ◽  
Pollution Prevention ◽  
Quality Standard ◽  
Ocean Current ◽  
Different Seasons ◽  
Grade Ii ◽  
June July ◽  
And Control

This paper analyzed the content and distribution of Pb in surface waters in Jiaozhou Bay in 1982. Results showed that Pb content in April, June, July and October ranged from 0.49-3.25μg.L-1, 0.45-3.35μg.L-1, 0.30-2.67μg.L-1and 0.33-0.67μg.L-1, respectively, complied with Grade I (1.00μg.L-1) or Grade II (5.00μg.L-1) in Sea water quality standard (GB 3097-1997) of China. As a whole, Jiaozhou Bay waters in 1982 was very lightly polluted by Pb. Non-point source was the major source of Pb in this bay, including atmosphere deposition, ocean current from the offshore, and the transportation of the head of the islands. The content, distribution and source of Pb showed significant seasonal variations, and different pollution prevention and control measurements should be took in different seasons.

Simulation of Water Age and Residence Time in New York Bight

2010 ◽  
Vol 40 (5) ◽  
pp. 965-982 ◽  
Author(s):  
Weifeng G. Zhang ◽  
John L. Wilkin ◽  
Oscar M. E. Schofield
Keyword(s):  
New York ◽  
Surface Water ◽  
Time Scales ◽  
Residence Time ◽  
Surface Waters ◽  
River Discharge ◽  
Long Island ◽  
Water Age ◽  
New York Bight ◽  
Island Coast

Abstract The time scales on which river inflows disperse in the coastal ocean are relevant to a host of biogeochemical and environmental processes. These time scales are examined in a modeling study of the Hudson River plume on its entry to the New York Bight (NYB). Constituent-oriented age and residence-time theory is applied to compute two time scales: mean age, which is calculated from the ratio of two model tracers, and residence time, which is calculated using the adjoint of the tracer conservation equation. Spatial and temporal variability associated with river discharge and wind is investigated. High river discharge lowers surface water age and shortens residence time in the apex of the NYB. Easterly winds increase surface water age and extend the duration waters along the Long Island coast remain in the NYB apex. Southerly winds increase age along the New Jersey coast but drive a decrease in age of offshore surface waters and prolong the time that surface waters close to the New Jersey coast stay in the NYB apex. Residence time along the Long Island coast is high in spring and summer because of the retention of water north of the Hudson shelf valley. Patterns of modeled surface water age and an age proxy computed from the ratio of satellite-measured irradiance in two channels show qualitative agreement. A least squares fit gives a statistically significant empirical relationship between the band ratio and modeled mean age for NYB waters.

scholarly journals CHARACTERIZATION OF VOLATILE ORGANIC COMPOUNDS AND ODOUR POLLUTION IN ATMOSPHERE AT OIL AND GASOLINE HANDLING AND PROCESSING IMPACT ZONE

2019 ◽  
Vol 1 ◽  
pp. 171
Author(s):  
Evita Muizniece-Treija ◽  
Iveta Šteinberga
Keyword(s):  
Air Quality ◽  
Human Health ◽  
Well Being ◽  
Pollution Level ◽  
Gaseous Pollutants ◽  
Monitoring Site ◽  
Short Term ◽  
Limit Values ◽  
Private Monitoring ◽  
Pollution Levels

Air quality pollution problem is still one of the crucial points for citizens in Europe for already receiving increasing attention, particularly because of the major European cities 10 and more years. Although the EU's long-term goal is to achieve levels of air quality that do not impact and risks to human health and the environment, many of member states still didn`t reach stated goals. Additionally, to gaseous pollutants, recently specific type of pollution, - odour, seems to become more important. Usually in order to determine pollution levels, national, municipal and private monitoring equipment is used. For this research municipal monitoring site in Riga (Latvia), at Milgravja Street 10, controlling gaseous pollutants (SO2, O3, BTX, PM10) and airborne particulate matter, and private monitoring results from Riga, Milgravja Street 16, where odour pollution was obtained, are analysed. Distance between both stations are just 500 m. Measurements at municipal monitoring site is obtained by DOAS and gravimetric sampling, while at Milgravja 16 by photoionization method or so-called “electronic nose”. Monitoring results in municipal station show that in 2017 the average benzene concentration was 4,87 ug/m3, toluene – 8,89 ug /m3 and xylene – 5,07 ug/m3, while the odour pollution level does not exceed 5 odour units. In general estimation of pollution averaged annually do not show and explain variability of pollution levels. It`s well known that high BTX and odour pollution episodes occur in shorter periods, thus short term limit values would be useful in order to characterize short term effects on human health and well-being.

scholarly journals CYP1A expression in freshwater fish of western New York as an indicator of pollution levels

2021 ◽  
Author(s):  
Rebecca Williams ◽  
Teri Koetsier ◽  
Seema Johnson ◽  
Kayla Miller ◽  
Theresa Taggart ◽  
...  
Keyword(s):  
New York ◽  
Freshwater Fish ◽  
Adaptive Strategy ◽  
Fish Population ◽  
Tumor Formation ◽  
Pollution Level ◽  
Love Canal ◽  
Pollution Levels ◽  
Nature Preserve ◽  
A Site

Various species of freshwater fish regulate the expression of certain proteins in response to environmental contamination. Previous research has shown that CYP1A expression increases in response to contaminant levels, and can result in increased tumor formation. Fish in contaminated environments would thus benefit by downregulating the expression of CYP1A to reduce tumor prevalence as an adaptive strategy. Alternatively, regulation of the CYP1A protein in fish can serve as a bioindicator of the pollution level of an environment. This study evaluated CYP1A expression in twelve different species of freshwater fish from seven bodies of water throughout western NY including Cuba Lake, Genesee River, Hanging Bog, Love Canal, Moss Lake, Rushford Lake and Tifft Nature Preserve. Western blot analysis was used to measure CYP1A expression as a marker of site pollution and potential fish population adaptation. It was hypothesized that low CYP1A expression at a site with known contamination would suggest signs of adaptation to pollution levels present. Furthermore, if at least one sample from a species showed CYP1A expression, then the CYP1A antibody (Caymen Chemical, USA; 173132) had compatibility with that species, eliminating falsely suspected adaptation. The results from this study suggest possible adaptation of fish may be occurring in the polluted Tifft Nature Preserve and Genesee River. In contrast, CYP1A expression in fish from Cuba Lake, Hanging Bog, Love Canal, Moss Lake, and Rushford Lake appear to represent known pollution levels and adaptation is not likely occurring. Results from this study are preliminary and next steps include collection and analysis of sediment to provide a stronger correlation between pollution at sites and CYP1A expression.

scholarly journals Microplastics in surface waters of the Wei River, China

2021 ◽  
Vol 251 ◽  
pp. 02090
Author(s):  
Jie Jiao ◽  
Hong Hu ◽  
Gang Chen ◽  
Zechuan Yang
Keyword(s):  
Surface Waters ◽  
Pollution Level ◽  
Shandong Peninsula ◽  
Dominant Type ◽  
The Wei River Basin ◽  
Average Abundance ◽  
New Type ◽  
Wei River Basin ◽  
Wei River

Microplastics are a new type of persistent organic pollutants, usually on the micron scale. In this study, we investigated the abundance, distribution, and other characterization of microplastics in surface waters of the Wei River Basin in the Shandong peninsula. The results showed that the abundance of microplastics in the surface water of Wei River varied from 0.40 to 1.20 items/L, and the average abundance was 0.81 items/L, which was at a moderate pollution level compared with other rivers. It was found that the abundance of microplastics was higher in densely populated areas, and hydrodynamic conditions such as river inflow and seawater scour also affected the abundance of microplastics. Fiber (83.4%) was the dominant type. Colorless (93.6%) was the dominant color type. The particle size (0.06 - 0.5mm) (47.9%) was the main size of microplastics in the Wei River. This study provides data for the further study of microplastics in rivers and provides a warning for the management and prevention of microplastics in freshwater.

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