Development and creation of a remote-controlled underwater laser induced breakdown spectrometer for analysis of the chemical composition of sea water and bottom sediments

2017 ◽  
Author(s):  
Sergey S. Golik ◽  
Dmitriy Yu. Proschenko ◽  
Ivan G. Nagorniy ◽  
Yuliya S. Biryukova ◽  
Michael Yu. Babiy ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Bottom Sediments ◽  
Sea Water ◽  
Laser Induced Breakdown ◽  
Underwater Laser

RELEASE OF NUTRIENTS FROM BOTTOM SEDIMENTS IN OSAKA BAY, JAPAN IN 2015

2017 ◽  
Author(s):  
Yukio Komai ◽  
Yukio Komai ◽  
Mana Sakata ◽  
Mana Sakata ◽  
Masaki Nakajima ◽  
...  
Keyword(s):  
Bottom Sediment ◽  
Bottom Sediments ◽  
Sea Water ◽  
Industrial Effluents ◽  
Ammonium Nitrogen ◽  
Water Release ◽  
Osaka Bay ◽  
The Core ◽  
Similar Range ◽  
Sea Area

Osaka Bay is the most polluted enclosed sea area, in which is located the eastern part of the Seto Inland Sea, Japan. There are four kinds of sources on loadings of nutrients to Osaka Bay, which are land including rivers and industrial effluents beside coast, ocean sea water, release from bottom sediment to sea water, and wet and dry deposition from air. The pollutant loadings inflowing from the land to Osaka Bay have been cut by various policies since 1970’s. The concentrations of nutrients in the inner part of Osaka Bay have showed an obvious decreasing tendency. However, the water quality in offshore sea has not satisfied the environmental standard on nutrients. We investigated the amount of nutrients released from bottom sediments. The core samples were taken at two stations in the inner part of Osaka Bay once a month from February to November, 2015. The core incubation experiment in laboratory was conducted for 24 hours according to Tada et.al. The concentrations of ammonium nitrogen (NH4-N) and phosphate phosphorus (PO4-P) were measured by an automatic analyzer. The flux showed similar range with the values investigated in 1986. The results suggested that the flux of nutrients from bottom sediments in the inner part of Osaka Bay has not decreased during summer season at least since 1985. Therefore, the contribution of release from bottom sediment on the nutrients budget would relatively become larger in inner part of Osaka Bay.

Laser-induced breakdown spectroscopy (LIBS) technique for the determination of the chemical composition of complex inorganic materials

2014 ◽  
Author(s):  
Łukasz Łazarek ◽  
Arkadiusz J. Antończak ◽  
Michał R. Wójcik ◽  
Paweł E. Kozioł ◽  
Bogusz Stępak ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Inorganic Materials ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

scholarly journals Bioassay of Lake Onego bottom sediments toxicity based on their chemical composition and deepwater macrozoobenthos state

2017 ◽  
Vol 22 (1) ◽  
pp. 81-103 ◽  
Author(s):  
Nataliya Michailovna Kalinkina ◽  
Natalya Alexandrovna Belkina ◽  
Anastasiya Ivanovna Sidorova ◽  
Nataliya Alekseevna Galibina ◽  
Kseniya Mikhailovna Nikerova
Keyword(s):  
Chemical Composition ◽  
Bottom Sediments

scholarly journals O limite marítimo do estuário do Sado a partir de imagens satelitais

Finisterra ◽  
2012 ◽  
Vol 30 (59/60) ◽  
Author(s):  
Eugénia Albergaria Moreira
Keyword(s):  
Bottom Sediments ◽  
Water Surface ◽  
Sea Water ◽  
Data Classification ◽  
Landsat Data ◽  
Delta Front ◽  
Water Turbidity ◽  
Estuary Mouth ◽  
Multispectral Data ◽  
Sado Estuary

SEA-SIDE LIMIT OF SADO ESTUARY IN LANDSAT IMAGERIES - The outside limit of Sado estuary corresponds to the submarine delta front, with an arcuate and digitate contour. It was individualised on the MSS Landsat data imageries. Multispectral data classification allowed to verify that the turbidity-plum of Sado estuary mouth rather corresponds to the low-sea-water surface associated to the brightness of the bottom sediments, that to the water turbidity content.

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