Search results for "Pollution"

Selective Cobalt over Nickel separation using neat and confined ionic liquids

2020

International audience; Task Specific Ionic Liquids (TSILs) generated by association between tetraalkylammonium cations and coordinating anions such as dicyanamide (Dca-) and thiocyanate (SCN-) were used for the selective separation of Ni(II) over Co(II). SCN-based TSIL presents higher extraction efficiency than the Dca-based one towards Co(II) (E = 85.4 % vs 54.6 %) and Ni (II) (E = 22 % vs 0.5%) but lower separation factors (βCo/Ni = 21 vs 239). Interestingly, extraction of Co(II) and Ni(II) in Dca-based TSIL can be enhanced using salts with chaotropic anions such as NaNO3 (E > 90 % for Co(II) and E = 85% for Ni(II)). The use of NaCl allows, moreover, the efficient separation of both ions…

Prevention of indoor and outdoor pollution

2013

Assessing the effect of chromium pollution on benthic foraminiferal community: morphological vs. environmental metabarcoding approaches

The purpose of this experimental study is to assess the impact of different concentrations of chromium (Cr) through time on the diversity of cultured benthic foraminifera combining two morphological approaches for the identification of living specimens that are Rose Bengal (RB) staining and CellTracker Green (CTG) labelling as well as environmental DNA and RNA metabarcoding. Seven tanks/aquaria with different concentrations of Cr in water, namely 100 ppt, 1 ppb, 10 ppb, 100 ppb, 1 ppm and 10 ppm plus the control were used. A mesocosm was extracted from each tank at pre-established time (1 week, 2 weeks, 4 weeks 6 weeks and 8 weeks). Morphological analyses produced 6 datasets based on staini…

Organophosphonate utilization by the wild‐type strain of cladosporium resinae

1997

We studied the biodegradation of compounds containing phosphorus‐to‐carbon bond by using wild‐type strain of Cladosporium resinae. The substrate specificity of the strain was studied and we found that it is able to utilize a range of structurally diverse organophosphonates as a sole source of phosphorus. This ability is inducible as indicated by the presence of a lag phase of the growth. A popular herbicide glyphosate is also degraded by the fungi. This indicates that Cladosporium resinae may play an important role in biodegradation of this herbicide. The strain which we used, however, did not metabolise any phosphonates when they served as the sole carbon or nitrogen sources.

BIOMASS UTILIZATION AS A RENEVABLE ENERGY SOURCE IN POLISH POWER INDUSTRY – CURRENT STATUS AND PERSPECTIVES

2015

The depletion of the conventional energy sources, as well as the degradation and pollution of the environment by the exploitation of fossil fuels caused the development of renewable energy sources (RES), including biomass. In Poland, biomass is the most popular renewable energy source, which is closely related to the obligations associated with the membership in the EU. Biomass is the oldest renewable energy source, and its potential, diversity and polymorphism place it over other sources. Besides, the improvement in its parameters, including an increase in its calorific value, resulted in increasing use of biomass as energy source. In the electric power industry biomass is applied in the p…

Quantitative identification, distribution and source apportionment of anthropogenic trace metals in marine sediment of Milazzo gulf (N-E Sicily): pre…

2009

Pour une approche cognitive et multiscalaire des conflits environnementaux

2011

Starting with artificial light as new object damage and emerging environmental problem, this paper intends to develop a general reflection showing the importance of a greater consideration of cognitive dimensions of the damage and risk analysis in environmental conflicting processes. We show how the cost-benefit analysis after the neoclassical theory of production, often used in the search for Pareto-optimal state and in the policies of monetary compensation to resolve environmental conflicts can - indeed must - be strongly challenged. Also, with this reasoning, we oppose an analysis in terms of cognitive interactions that groups develop around environmental goods and items of damage, thus …

La contamination du monde. Une histoire des pollutions à l'âge industriel

2017

International audience

La préservation de l'environnement nocturne : les enjeux d'une controverse sociotechnique

2013

This communication explains the birth of an environmental problem, light pollution, understood as a socio-technical controversy. Over forty years, in support of the actor-network approach, it traces the conditions of its emergence, transformation and dissemination to local, national and transnational levels, and through various professional disciplines. Schematically, "environmentalists" uphold a holistic approach of "nocturnité" and define artificial light as a pollutant. Facing them, the "technicist" defend a segmented approach and define artificial light as a nuisance. The implementation of this controversy on the political agenda leads to institutional decisions that grasp it with diffi…

(Ré)concilier éclairage urbain et environnement nocturne : les enjeux d’une controverse sociotechnique

2014

International audience; Our paper explains the birth of an environmental problem, i.e. light pollution, viewed as a socio-technical controversy. Supported by the actor-network approach, it traces over forty years the conditions of its emergence, transformation and dissemination to local, national and transnational levels and through various professional disciplines. Schematically, “environmentalists” uphold a holistic approach of “nocturnality” and define artificial light as a pollutant. Facing them, the “technicist” defends a segmented approach and defines artificial light as a nuisance. The introduction of this controversy into the political agenda leads to institutional decisions that gr…