Figure 1 - uploaded by Doru Bănăduc
Content may be subject to copyright.
Source publication
The Assessment and monitoring of persistent pollutants in lotic ecosystems methodological guide include the following main chapters: persistent organic pollutants (POP) definition and classification; POP assessment in lotic type ecosystems; POP sampling and sample preservation; and POP chemical analysis.
Contexts in source publication
Context 1
... order to avoid the degradation of the chemicals of interest from the sample, it is recommended to perform the extraction as soon as possible, preferably within 24 h from sampling (*SR EN ISO 6468). A list of required sampling equipment and material is presented in Figure 11. Figure 11. ...
Context 2
... list of required sampling equipment and material is presented in Figure 11. Figure 11. List of required equipment and materials for water sampling. ...
Context 3
... order for the analysis results to be relevant, it is necessary to collect a number of 5 -10 individuals of each species selected according to the assessment/monitoring methodology. A list of required sampling equipment and material is presented in Figure 13. ...
Context 5
... low concentrations the points from a. to e. may be used, while for high concentrations the points from f. to j. may be used. Figure 18 presents a calibration curve for α-HCH. Figure 18. ...
Citations
... These contaminants are the 10 intentionally produced chemicals: aldrin, endrin, chlordane, DDT, dieldrin, heptachlor, mirex, toxaphene, hexachlorobenzene (HCB) and PCBs and the two unintentionally produced substances polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans Classification of persistent organic compounds according to their origin. Picture adapted from [9]. ...
Persistent organic pollutants (POPs), which are synthetic organic chemical compounds, either intentionally or unintentionally produced, have widely aroused public concern in recent years. These chemicals are toxic and major environmental concern due to their persistence, long range transportability, bioaccumulation and potentially adverse effects on living organisms. Uncontrolled inputs combined with poor environmental management often result in elevated levels of persistent organic pollutants in affected estuaries. Since the Stockholm Convention on POPs was adopted, different techniques have been extensively developed. A major focus revealed the need for low cost methods that can be implemented easily in developing countries such as electrochemical techniques. Persistent organic pollutants are known to be resistant to conventional treatment methods such as flocculation, coagulation, filtration and oxidant chemical treatment. However, various advanced wastewater treatment technologies such as, activated carbon adsorption, biodegradation using membrane bioreactor and advanced oxidation processes (AOPs) have been applied in the treatment of POPs.
... 8.11Aldrin,-Dieldrin,-Endrin,-Mirex,-Hexaclhorobenzene (HCB),-Heptachlor (heptachlor, cis-heptachlor epoxide, trans-heptachlor epoxide),-Chlordane (oxychlordane, trans-chlordane, cis-chlordane),-Endosulfan (endosulfan I, endosulfan II),-brominated flame retardants (BFR-12 compounds, only in fish tissue),-perfluorinated compounds (PFAS –18 compounds, only in fish tissue). The water analysis of samples was performed by a SPE (solid phase extraction) method for the extraction and purification of POP and quantification was performed using a gas chromatograph coupled with a triplequadrupol mass spectrometer (Curtean-Bănăduc et al. 2016). ...
... POP tissue extraction was conducted by LLE with sulphuric acid purification from the lipid solution (Polder et al. 2008a, Polder et al. 2008b). Quantification of pollutants was performed using a gas chromatograph coupled to a triplequadrupol mass spectrometer (Curtean-Bănăduc et al. 2016). ...
Persistent organic pollutants in Mureş (Transylvania, Romania) watershed. The distribution and concentration of POPs in the reference zone, in water, sediment and fish different tissues.
This paper is a synthetic overview of some of the threats, risks, and integrated water management elements in freshwater ecosystems. The paper provides some discussion of human needs and water conservation issues related to freshwater systems: (1) introduction and background; (2) water basics and natural cycles; (3) freshwater roles in human cultures and civilizations; (4) water as a biosphere cornerstone; (5) climate as a hydrospheric 'game changer' from the perspective of freshwater; (6) human-induced stressors' effects on freshwater ecosystem changes (pollution, habitat fragmentation, etc.); (7) freshwater ecosystems' biological resources in the context of unsustainable exploitation/overexploitation; (8) invasive species, parasites, and diseases in freshwater systems; (9) freshwater ecosystems' vegetation; (10) the relationship between human warfare and water. All of these issues and more create an extremely complex matrix of stressors that plays a driving role in changing freshwater ecosystems both qualitatively and quantitatively, as well as their capacity to offer sustainable products and services to human societies. Only internationally integrated policies, strategies, assessment, monitoring, management, protection, and conservation initiatives can diminish and hopefully stop the long-term deterioration of Earth's freshwater resources and their associated secondary resources.
Because of huge consumption for agricultural purpose, presence of pesticides in surface waters of Golestan province (north east of Iran) is very common. These pesticides finally could be stored in aquatic ecosystems and have proven toxic effects on aquatic animals. Culex quinquefasciatus is one of the most common aquatic insects living mainly in the wetlands. The aim of this study was to determine the acute toxicity of deltamethrin and diazinon as potentially perilous organic pesticides and to assess mortality effects of these chemicals on the mosquito Culex quinquefasciatus in the form of LC50.
Rezultatele obținute cu privire la prezența și concentrația POP în ecosistemele lotice din bazinul hidrografic Mureş relevă necesitatea implementării unui program național de monitorizare a POP în ecosistemele acvatice, cu măsurarea concentrației acestor poluanți în sediment, apă (POP cu moleculă polară) și biota, precum și a elaborării unui program de evaluare și management al riscului POP pentru ecosisteme și sănătatea umană.
Persistent organic pollutants general considerations. Modelling bioaccumulation circuits, POP scatering in the environment and adjacent risk assessment. GIS - in pollution modeling of persistent organic pollutants. The impact of persistent organic pollutants on human health. DDT - from a universal cure to an environmental problem. Persistent organic pollutants in continental aquatic ecosystems. The effects of DDT on physiological mechanisms in fish. Persistent organic pollutants in Mureș watershed.
