Model ecosystem determination of the metabolic and environmental fate of tetrachloro-DDT

1987 ◽  
Vol 38 (1) ◽  
pp. 96-103 ◽  
Author(s):  
Richard B. Cole ◽  
Robert L. Metcalf
Keyword(s):  
Environmental Fate ◽  
Model Ecosystem

Anomalously low electrostatic bending stiffness of graphene oxide 2D membranes regulates its environmental fate in aquatic ecosystems

2021 ◽  
Author(s):  
Mohamad Ali Sanjari Shahrezaei ◽  
Seyed Mohammad-Reza Taheri ◽  
Hesam Nikfazan ◽  
Alexandra Satalov ◽  
Mohsen Moazzami Gudarzi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Environmental Impact ◽  
Surface Waters ◽  
Aquatic Ecosystems ◽  
Environmental Fate ◽  
2D Materials ◽  
Bending Stiffness ◽  
High Importance

Though deemed to be of high importance for the determination of environmental impact of 2D materials upon their release into surface waters, control over the conformational engineering of atomically thin...

Environmental fate modelling of chlorodioxins: Determination of physical constants

Chemosphere ◽  
1985 ◽  
Vol 14 (6-7) ◽  
pp. 609-622 ◽  
Author(s):  
G.R.B. Webster ◽  
K.J. Friesen ◽  
L.P. Sarna ◽  
D.C.G. Muir
Keyword(s):  
Environmental Fate ◽  
Physical Constants ◽  
Fate Modelling

scholarly journals Determination of Surfactants in Environmental Samples. Part III. Non-Ionic Compounds

2013 ◽  
Vol 20 (3) ◽  
pp. 449-461 ◽  
Author(s):  
Ewa Olkowska ◽  
Marek Ruman ◽  
Anna Kowalska ◽  
Żaneta Polkowska
Keyword(s):  
Environmental Fate ◽  
Total Concentration ◽  
Ionic Surfactants ◽  
General View ◽  
Environmental Matrices ◽  
Solid Samples ◽  
Detection Techniques ◽  
Liquid Samples ◽  
Ionic Compounds

Abstract Non-ionic surface active agents are a diverse group of chemicals which have an uncharged polar head and a non-polar tail. They have different properties due to amphiphilic structure of their molecules. Commercial available non-ionic surfactants consist of the broadest spectrum of compounds in comparison with other types of such agents. Typically, non-ionic compounds found applications in households and industry during formulation of cleaning products, cosmetics, paints, preservative coatings, resins, textiles, pulp and paper, petroleum products or pesticides. Their are one of the most common use class of surfactants which can be potential pollution sources of the different compartment of environment (because of they widely application or discharging treated wastewaters to surface water and sludge in agricultural). It is important to investigate the behavior, environmental fate of non-ionic surfactants and their impact on living organisms (they are toxic and/or can disrupt endocrine functions). To solve such problems should be applied appropriated analytical tools. Sample preparation step is one of the most critical part of analytical procedures in determination of different compounds in environmental matrices. Traditional extraction techniques (LLE - for liquid samples; SLE - for solid samples) are time and solvent-consuming. Developments in this field result in improving isolation efficiency and decreasing solvent consumption (eg SPE and SPME - liquid samples or PLE, SFE and MAE - solid samples). At final determination step can be applied spectrophotometric technique, potentiometric titrametration or tensammetry (determination total concentration of non-ionic surfactants) or chromatographic techniques coupled with appropriated detection techniques (individual analytes). The literature data concerning the concentrations of non-ionic surfactants in the different compartments of the environment can give general view that various ecosystems are polluted by those compounds.

Evaluation of Currently Available Techniques for Studying Colloids in Environmental Media

2016 ◽  
pp. 1-26
Author(s):  
Allan Philippe
Keyword(s):  
Light Scattering ◽  
Environmental Fate ◽  
Emerging Pollutants ◽  
Engineered Nanoparticles ◽  
Current Development ◽  
Environmental Media ◽  
Low Concentrations ◽  
Icp Ms ◽  
Promising Solution

Engineered nanoparticles are emerging pollutants with poorly known environmental fate and impact. Studying the fate of engineered colloids in the environment is highly challenging due to the complexity of their possible interactions with environmental components and to the need of dedicated analytical methods. Many relevant processes like e.g. agglomeration and dissolution can be studied by monitoring the size of colloids. Techniques dedicated to the determination of the size of colloids in environmental media are thus required. Such techniques should remain accurate at low concentrations and be specific, widely matrix independent and free of artefact due to sample preparation. This chapter aims at evaluating and comparing systematically the currently used tools (e.g. microscopy, light scattering, particle counters) for sizing colloids considering these requirements. As an example of a highly promising solution, the current development of separation techniques coupled to (single particle) ICP-MS is described in more details.

Development of a Product Screening Protocol to Minimize Marine Environmental Impacts of Oil Production Chemicals Used Offshore

1992 ◽  
Vol 25 (3) ◽  
pp. 85-92 ◽  
Author(s):  
E. A. Vik ◽  
J. D. Berg ◽  
S. Bakke ◽  
G. D. Øfjord ◽  
M. Reinhard
Keyword(s):  
Environmental Impacts ◽  
High Performance ◽  
Water Distribution ◽  
Oil And Gas ◽  
Environmental Fate ◽  
Gas Production ◽  
Distribution Factor ◽  
Screening Protocol ◽  
Oil Water

This paper presents the initial results of a research project initiated by Conoco Norway, Inc. (CNI) late in 1989. The objective of the project is to develop a screening protocol for determining the potential environmental impacts of five types of chemicals typically used in offshore oil and gas production operations in the North Sea. The protocol includes tests for determination of bioaccumulation potential, oil-water distribution factor, biodegradation potential, and toxicity. When fully developed, the protocol represents one possible approach to implementing the proposed PARCOM standard testing program. Only the results for the bioaccumulation potential and oil-water distribution factor are presented here. For determination of bioaccumulation potential, the High Performance Liquid Chromatography (HPLC) is recommended. The oil-water distribution factor can be determined by surrogate parameters as total organic carbon (TOC), UV-absorption or gas chromatography (GC). This factor is critical in sample preparation and evaluation of the environmental fate and effect of oilfield chemicals. Both acute and chronic toxicity should be taken into consideration for evaluation of toxicity. The ratio between the highest likely concentration of the chemical in the environment (Potential Environmental Concentrations - PEC) and the lowest concentration, at which harmful effects are likely to be observed (Minimum Adverse Effect Concentration - MAEC) gives the size of the apparent margin of safety.

scholarly journals Model ecosystem studies of the environmental fate of six organochlorine pesticides.

1973 ◽  
Vol 4 ◽  
pp. 35-44 ◽  
Author(s):  
R L Metcalf ◽  
I P Kapoor ◽  
P Y Lu ◽  
C K Schuth ◽  
P Sherman
Keyword(s):  
Organochlorine Pesticides ◽  
Environmental Fate ◽  
Model Ecosystem ◽  
Ecosystem Studies
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