Electrochemical remediation of soil: application to copper extraction

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Species distribution models (SDMs) are widely used to predict species' geographic distributions, serving as critical tools for ecological research and conservation planning. Typically, SDMs relate species occurrences to environmental variables representing abiotic factors, such as temperature, precipitation, and soil properties. However, species distributions are also strongly influenced by biotic interactions with other species, which are often overlooked in traditional models. While some methods, such as

The global transition to sustainable energy systems requires breakthroughs in electrochemical storage technologies that are not only safe but also resource efficient. Solid-state batteries (SSBs), which use superionic solid electrolytes (SEs) instead of flammable liquid electrolytes, are at the forefront of this transformation. In general, SEs promise increased safety, access to high-voltage cathode and metal anode chemistries, and new avenues for circular design and recyclability. However, to reach their f

Railroad diagrams (also called “syntax diagrams”) are a common, intuitive visualization of grammars, but limited tooling and a lack of formal attention to their layout mostly confines them to hand-drawn documentation. We present the first formal treatment of railroad diagram layout along with a principled, practical implementation. We characterize the problem as compiling a diagram language (specifying conceptual components and how they connect and compose) to a layout language (specifying basic graphical s

Invasive species pose a major threat to biodiversity and forest ecosystem services, and are expected to benefit from climate change, becoming even more impactful in the future. This thesis investigates the physiological strategies of Trachycarpus fortunei, an invasive palm increasingly spreading in sub-Mediterranean forests south of the Alps. The main objective was to assess how light, temperature, and water availability influence its performance compared to native tree species, to understand the mechanisms

Warming in the Arctic is occurring at an accelerated rate compared to the rest of the world which is partially driven by ecological and climatic feedback loops. Accelerated glacial and ice sheet retreat in Greenland drives increased development of glacial outwash plains, the climatic impact of which remains largely unknown. Receding glaciers uncover new habitats of nutrient poor sediment, formed over centuries from rock eroded by ice. Microbes are capable of colonising this oligotrophic environment which al

In a granulometric material, there can be three different types of instabilities: by vibrations, by shearing or by gravity action. Washboard effect appears when a car is rolling on an unpaved road (made of sand, gravel or mud). It creates waves that are uncomfortable for the driver, and moreover, can be really dangerous due to the possibility of losing contact between the wheel and the road. It is a very tough problem because of its robustness. It starts initially with small ripples that grows bigger and bi

One of the aims of the treatment of domestic and industrial wastewater is the removal of phosphorus prior to discharge into the environment. Since phosphorus concentrations in wastewater exceed the requirement of bacterial growth, biological phosphorus removal is based on the ability of a group of microorganisms, named “Polyphosphate Accumulating Organisms” (PAO), to form large quantities of polyphosphate in their cells. In this study, we are focussing on the bacteria actively involved in the phosphorus rem

We here study the scouring processes that evolve around a submarine pipeline placed on a weakly cohesive seabed. We first analyze some laboratory tests carried out by Vijaya Kumar et al. [21], Xu et al. [25] and Zhou et al. [28] that focused on the scourin ...

Soil moisture is an essential control on hydrological and meteorological behavior and knowledge of its spatial variability is considered to be of high importance for the performance of distributed hydrological models. Few studies have tried to assess the spatial variability of soil moisture in mountainous catchment. Since 2008, an alpine watershed in the Swiss Alps has been intensely monitored with a network of wireless meteorological stations. We present some preliminary results from statistical and geosta

Concrete is the building material with the greatest potential for meeting the increasing housing demand in developing countries. Locally available materials should be considered as cement replacement in order to lower the costs and the environmental impact ...

A solid oxide fuel (SOFC) cogenerates heat and electricity with high efficiency. Electricity is produced by the electrochemical reaction of a fuel (H2, CO, CH4) and an oxidant gas (O2, air). The SOFC standard design is based on an anode-supported electrolyte. The anode is composed of yttria-stabilized zirconia (YSZ) and nickel oxide (NiO). NiO is reduced in situ into metallic nickel during the first use of the fuel cell. Porosity is formed to compensate the volume shrinkage induced by the reduction (40 vol%

The present thesis is part of a project exploring new possibilities to remediate soils polluted by insecticide lindane and herbicide atrazine. It is the Indo-Swiss project entitled "Development of Phytoremediation Techniques Using Interactive Potential of Plant and Microbial Activities for Pesticides Hexachlorocyclohexane (HCH) and Atrazine". The purpose of this project was to address the problems of contamination of sites, agricultural soils, groundwater, surface water, and agricultural food products with

We studied the electrochemical oxidation, on Pt anodes, of industrial wastewaters containing 5-amino-6-methyl-2-benzimidazolone (AMBI). Electrolysis of this non-biodegradable effluent produces simultaneous oxidation of AMBI and chloride ions. Highly oxidative chlorine intermediate species further boost the degradation of AMBI. Solution temperature, pH and current density affect little the degradation of AMBI. At our best conditions, AMBI was 100% degraded in 45 min. However, because the reaction intermediat

The stability and water exchange dynamics of gadolinium (GdIII) complexes are critical characteristics that determine their effectiveness as contrast agents for magnetic resonance imaging (MRI). A new heteropodal GdIII chelate, [Gd-TREN-bis(6-Me-HOPO)-(TAM-TRI)(H2O)2] (Gd-2), is presented which is based on a hydroxypyridinate (HOPO)-terephthalamide (TAM) ligand design. Thermodynamic equilibrium constants for the acid−base properties and the GdIII complexation strength of TREN-bis(6-Me-HOPO)-(TAM-TRI) (2) we

Interplay between Identiﬁcation and Optimization in Run-to-run Schemes B. Srinivasan, D. Bonvin ´ Institut d’Automatique, Ecole Polytechnique F´d´rale de Lausanne, ee CH-1015 Lausanne, Switzerland. Optimization of batch processes has received increasing attention since its provides an uniﬁed framework to improve productivity without violating constraints on safety, selectivity, reproducability, etc. Due to uncertainties (disturbances and modeling errors) that are invariably present at the industrial level,

The electro-combustion of water sol. polymeric contaminants such as polyacrylates (PA) in aq. acid soln. using a B-doped diamond anode was studied by bulk electrolysis in 1 mol/dm3 HClO4 under galvanostatic conditions in a wide range of PA concns. and current densities. In all cases complete electro-combustion of PA was achieved and this is the 1st successful report for the electro-combustion of sol. org. polymers. The exptl. COD and instantaneous current efficiency values are well predicted from a theor. m

Pb(Mg1/3Nb2/3)O-3 (PMN) alkoxide precursor solutions were synthesized and used to prepare thin layers on TiO2/Pt/TiO2/SiO2/Si substrates by spin coating. Many parameters like homogeneity of the solution and appropriate processing must be controlled to minimize the pyrochlore formation. Optimization of the processing allowed highly (111)-oriented thin films to be obtained. Dielectric measurements and TEM investigations were performed and showed that PMN thin films exhibit relaxer behavior.

A simple method is presented which allows to est. the facility of the electrochem. oxidn. of org. species using the "electrochem. oxidn. index" (EOI) and the degree of oxidn. using the "electrochem. oxygen demand" (EOD). Using this method the authors have found that: - At the platinum anode, benzene derivs. having electron donating substituents are efficiently oxidized. The EOI values for oxidn. of phenol are independent of c.d. and temp. but increase with phenol concn. and pH. The EOI values are strongly d

It is confirmed that Ag(I) is a very effective catalyst for the oxidn. of Mn(II) to permanganate. At anodic potentials below + 1300 mV (vs. Hg/Hg2SO4.K2SO4 ref. electrode) in 30% H2SO4 at 10 Deg, the current efficiency of permanganate formation is high; above 1300 mV AgO is deposited at the anode and the current efficiency of permanganate decreases due to the side reaction of oxygen evolution. [on SciFinder (R)]

The chem. redn. of anthraquinone(I) has at least 2 disadvantages on the industrial scale; therefore, an electrochem. method was developed. The electrochem. redn. of I is done in a 2-compartment cell using concd. H2SO4 (15-17 mol/dm3) as the electrolyte at the relatively low temp. of 40-60 Deg. The cathode can be Pt or Ag, and a low c.d. (

Electrochemical remediation of soil: application to copper extraction

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CISO : Species distribution modelling Conditioned on Incomplete Species Observations

2026 roadmap on next-generation solid electrolytes for battery applications

Automatic Layout of Railroad Diagrams

Palms on the rise: Invasion mechanisms of Trachycarpus fortunei under climate change

Climatic and Ecological Impact of Greenlandic Glacial Outwash Plains

Washboard effect of unpaved roads

Identification of microorganisms in Aerobic Granular Sludgeactively involved in biological phosphorus removal

Scour depth under pipelines placed on weakly cohesive soils

Spatial variability of near surface soil moisture in an alpine catchment: application of a wireless network of meteorological stations

Calcined clayey soils as a potential replacement for cement in developing countries

Solid oxide fuel cell redox instability characterized by in situ transmission electron microscopy

A phytoremediation approach to remove pesticides (atrazine and lindane) from contaminated environment

Electrochemical treatment of industrial wastewater containing 5-amino-6-methyl-2-benzimidazolone: toward an electrochemical-biological coupling

A Highly Stable Gadolinium Complex with a Fast, Associative Mechanism of Water Exchange

Interplay between Identification and Optimization in Run-to-run Schemes

Electro-combustion of polyacrylates with boron-doped diamond anodes

Preparation and electromechanical properties of Pb(Mg1/3Nb2/3)O-3 thin film

Electrochemical treatment of wastewater containing organic pollutants

Electrochemical oxidation of manganese(II) to permanganate (MnO4-) in the presence of silver(I) catalyst

The electrochemical reduction of anthraquinone to anthrone in concentrated sulfuric acid