The Importance Of Monitoring And Assessment Methods In The Aquatic Environment

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2. Monitoring and assessment method Mercury cannot be degraded, and once dispersed in the environment must be bond to another element, diluted, stored and/or exported in order to detox the environment. Left in the environment, mercury is persistent for decades or century, dependable of its state. Mercury concentrations vary through seasons, and the levels of elemental gaseous mercury (GEM) in air and dissolved gaseous mercury (DGM) are significantly higher in fall compared to summer. This supports the importance of assessment and remediation methods at the right moment and the importance of the concentration of used agents (Mastromonaco et al, 2016; Mastromonaco et al, 2017). Relevant management strategies are classified as chemical, …show more content…

Moreover, apart being used as a bioindicator, some marine organism are used in remediation techniques due their potential to accumulate metals, also due their sedentary lifestyle or/and 11 short life cycles. Such organisms are again macroalgae but as well microbes, which represent ideal organism for removal of mercury (Henriques 2015; Henriques et al, 2017; Gomez-Jacinto et al, 2015; Marques, 2016). Mercury is a volatile element and is highly toxic with limit of 0.1 mg m-3 in the air. This limit is already easy obtainable at room temperature, 20°C (WebElement, 2017). Due its volatility and toxicity, the amount of accumulated mercury can be better estimated by sensitive methods such are high resolution continuum source atomic absorption spectrometry, HR CS AAS (Mandjukov et al, 2015). As well, sensitive detection of mercury compounds can be estimated by combined techniques such are cation exchange chromatographic separation and inductively coupled plasma mass spectrometry (ICP-MS), which had a good result in estimation of compounds commonly present in marine environment, such are inorganic mercury (Hg2+), methylmercury (MeHg), ethylmercury (EtHg) and phenylmercury (PhHg), (Chen et al, 2013). Another combined technique with good results is application of electrokinetic (EK) decontamination treatments

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