scholarly journals In situ evaluation of DGT techniques for measurement of trace metals in estuarine waters: a comparison of four binding layers with open and restricted diffusive layers

2016 ◽  
Vol 18 (1) ◽  
pp. 51-63 ◽  
Author(s):  
Amir Houshang Shiva ◽  
William W. Bennett ◽  
David T. Welsh ◽  
Peter R. Teasdale
Keyword(s):  
Trace Metals ◽  
Coastal Waters ◽  
Gold Coast ◽  
Estuarine Waters

Four different DGT binding layers were used to make selective measurements of trace metals in coastal waters within The Broadwater (Gold Coast, Queensland).

scholarly journals In situ measurement of trace metals in estuarine waters of Patos Lagoon using diffusive gradients in thin films (DGT)

2009 ◽  
Vol 20 (2) ◽  
pp. 333-340 ◽  
Author(s):  
Mônica Wallner-Kersanach ◽  
Carlos Francisco F. de Andrade ◽  
Hao Zhang ◽  
Márcio R. Milani ◽  
Luis Felipe H. Niencheski
Keyword(s):  
Thin Films ◽  
Trace Metals ◽  
In Situ Measurement ◽  
Patos Lagoon ◽  
Estuarine Waters ◽  
Diffusive Gradients

The determination of trace metals in estuarine and coastal waters using a voltammetric in situ profiling system

The Analyst ◽  
2003 ◽  
Vol 128 (6) ◽  
pp. 734 ◽  
Author(s):  
Kate A. Howell ◽  
Eric P. Achterberg ◽  
Charlotte B. Braungardt ◽  
Alan D. Tappin ◽  
David R. Turner ◽  
...  
Keyword(s):  
Trace Metals ◽  
Coastal Waters

Voltammetric in situ measurements of trace metals in coastal waters

2003 ◽  
Vol 22 (11) ◽  
pp. 828-835 ◽  
Author(s):  
Kate A. Howell ◽  
Eric P. Achterberg ◽  
Charlotte B. Braungardt ◽  
Alan D. Tappin ◽  
Paul J. Worsfold ◽  
...  
Keyword(s):  
Trace Metals ◽  
Coastal Waters ◽  
In Situ Measurements

scholarly journals Assessing an Atmospheric Correction Algorithm for Time Series of Satellite-Based Water-Leaving Reflectance Using Match-Up Sites in Australian Coastal Waters

2021 ◽  
Vol 13 (10) ◽  
pp. 1927
Author(s):  
Fuqin Li ◽  
David Jupp ◽  
Thomas Schroeder ◽  
Stephen Sagar ◽  
Joshua Sixsmith ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Atmospheric Correction ◽  
Correction Method ◽  
In Situ Measurements ◽  
Landsat 8 ◽  
Correction Algorithm ◽  
Simple Method ◽  
North East ◽  
The Impact

An atmospheric correction algorithm for medium-resolution satellite data over general water surfaces (open/coastal, estuarine and inland waters) has been assessed in Australian coastal waters. In situ measurements at four match-up sites were used with 21 Landsat 8 images acquired between 2014 and 2017. Three aerosol sources (AERONET, MODIS ocean aerosol and climatology) were used to test the impact of the selection of aerosol optical depth (AOD) and Ångström coefficient on the retrieved accuracy. The initial results showed that the satellite-derived water-leaving reflectance can have good agreement with the in situ measurements, provided that the sun glint is handled effectively. Although the AERONET aerosol data performed best, the contemporary satellite-derived aerosol information from MODIS or an aerosol climatology could also be as effective, and should be assessed with further in situ measurements. Two sun glint correction strategies were assessed for their ability to remove the glint bias. The most successful one used the average of two shortwave infrared (SWIR) bands to represent sun glint and subtracted it from each band. Using this sun glint correction method, the mean all-band error of the retrieved water-leaving reflectance at the Lucinda Jetty Coastal Observatory (LJCO) in north east Australia was close to 4% and unbiased over 14 acquisitions. A persistent bias in the other strategy was likely due to the sky radiance being non-uniform for the selected images. In regard to future options for an operational sun glint correction, the simple method may be sufficient for clear skies until a physically based method has been established.

scholarly journals Microwave Sensors for In Situ Monitoring of Trace Metals in Polluted Water

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3147
Author(s):  
Ilaria Frau ◽  
Stephen Wylie ◽  
Patrick Byrne ◽  
Patrizia Onnis ◽  
Jeff Cullen ◽  
...  
Keyword(s):  
Trace Metals ◽  
In Situ Monitoring ◽  
Polluted Water ◽  
Pollution Level ◽  
Mining Areas ◽  
Low Concentrations ◽  
The Uk ◽  
Microwave Sensors ◽  
Immediate Response

Thousands of pollutants are threatening our water supply, putting at risk human and environmental health. Between them, trace metals are of significant concern, due to their high toxicity at low concentrations. Abandoned mining areas are globally one of the major sources of toxic metals. Nowadays, no method can guarantee an immediate response for quantifying these pollutants. In this work, a novel technique based on microwave spectroscopy and planar sensors for in situ real-time monitoring of water quality is described. The sensors were developed to directly probe water samples, and in situ trial measurements were performed in freshwater in four polluted mining areas in the UK. Planar microwave sensors were able detect the water pollution level with an immediate response specifically depicted at three resonant peaks in the GHz range. To the authors’ best knowledge, this is the first time that planar microwave sensors were tested in situ, demonstrating the ability to use this method for classifying more and less polluted water using a multiple-peak approach.

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