Occurrence of quinotone antibiotics and their impacts on aquatic environment in typical river-estuary system of Jiaozhou Bay, China

The difference in accumulation of lead and mercury heavy metals in water, sediments and seagrass organs Enhalus acoroides (roots, rhizomes and leaves) is found in the waters of Kayeli Bay, Buru Island, Maluku Province. Samples were taken from ten observed station (Kayeli River Estuary, Suket River Estuary, Anahoni River Estuary, Waelata I Estuary, Waelata River Estuary II, Waeapo River Estuary, Sanleko River Estuary, Marlosso River Estuary, Nametek Beach and Jikumerasa Beach). Pb and Hg were analyzed using Atomic Absorption Spectrophotometer. The content of Pb and Hg in sediments is higher than in water. The highest Pb and Hg content is found in the roots then in the rhizoma and leaves (roots> rhizoma> leaves). Seagrass Enhalus acoroides is one of the living organisms that can be used as a bio-indicator of the level of heavy metal pollution in the aquatic environment. Key Words: Enhalus acoroides, Pb, Hg, Bioakumulasi, Bioindicator

Download Full-text

Distribution, Enrichment and Transport of Trace Metals in Sediments from the Dagu River Estuary in the Jiaozhou Bay, Qingdao, China

Minerals ◽

10.3390/min9090545 ◽

2019 ◽

Vol 9 (9) ◽

pp. 545 ◽

Cited By ~ 5

Author(s):

Jinqing Liu ◽

Ping Yin ◽

Xiaoying Chen ◽

Ke Cao

Keyword(s):

River Runoff ◽

Marine Organism ◽

Jiaozhou Bay ◽

River Estuary ◽

Threshold Effect ◽

Entire Study ◽

River Bank ◽

Probable Effect Level ◽

Threshold Effect Level ◽

Effect Level

26 river bank sediments and 15 estuary seafloor sediments were sampled from the Dagu River and the estuary of Northwestern Jiaozhou Bay to determine contaminations of heavy metals and metalloids (Cu, Pb, Zn, Cr, Cd, Hg and As). The trace metal contents in sediment from the estuary area were much higher than those of the river. Correlation analysis showed that except for Pb, the metals were mainly controlled by the grain size, and enriched by adsorption of aluminosilicate minerals, Fe/Mn oxides and organic matter in river and estuary sediments. In addition to Cu in some stations, the metals met the requirements of the marine organism and humans for the quality of the marine environment. The concentrations of Cu, Pb, Cr, Hg and As were between the threshold effect level (TEL) and probable effect level (PEL), indicating those metals might have occasional adverse effects. Results of Enrichment Factor values revealed that the entire study area was enriched in Pb and Hg, at moderate environmental risk, but the estuary was more significant. Pb and Hg contaminations in this area were mainly from coal combustion and automobile emissions. River runoff and atmospheric deposition dominated the metals distribution and enrichment in the study area. Contaminants in sediments entering the estuary were further transported to the south and east under the river runoff and reciprocating current in the Jiaozhou Bay.

Download Full-text

Distribution Characteristics of Simultaneously Extracted Metals in Licun River Estuary Sediments of Jiaozhou Bay

2010 4th International Conference on Bioinformatics and Biomedical Engineering ◽

10.1109/icbbe.2010.5516226 ◽

2010 ◽

Author(s):

Xiaoqiang Pu ◽

Deli Wang ◽

Yan Lv ◽

Shaojun Zhong ◽

Xiaodong Pang

Keyword(s):

Jiaozhou Bay ◽

River Estuary ◽

Distribution Characteristics ◽

Simultaneously Extracted Metals

Download Full-text

Distribution Characteristics of Soil Organic Carbon in Estuarine Wetland of Qingdao Dagu River

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.737.469 ◽

2015 ◽

Vol 737 ◽

pp. 469-472

Author(s):

Fan Long Kong ◽

Min Xi ◽

Yue Li ◽

Wen Hao Zhang ◽

Yang Liu

Keyword(s):

Organic Carbon ◽

Soil Organic Carbon ◽

Coastal Wetland ◽

Soil Depth ◽

Jiaozhou Bay ◽

River Estuary ◽

Soil Samples ◽

Downward Trend ◽

Distribution Characteristics ◽

Different Depths

Distribution characteristics of content of soil organic carbon in wetland were studied by the analysis of four soil samples from areas, which were at different depths of soil, collected in the Dagu River estuary of Qingdao during summer of 2014. The result showed that the content of soil organic carbon in coastal wetland of Jiaozhou bay had an overall downward trend with the increase of soil depth. Because of the influence of hydro-salinity environment and tidal action, in regions near the sea, the content of soil organic carbon was less than its counterpart in regions away from the ocean.

Download Full-text