Encontrados 13 documentos, a visualizar página 1 de 2

Biomass fly ashes as low-cost chemical agents for Pb removal from synthetic and...

The main aim of this work was to study the removal efficiency of Pb from synthetic and industrial wastewaters by using biomass fly ashes. The biomass fly ashes were produced in a biomass boiler of a pulp and paper industry. Three concentrations of Pb2+ were tested in the synthetic wastewater (1, 10 and 1000 mg Pb/L). Moreover, two different wastewaters were collected in an industrial wastewater treatment plant ...

Sorption of lead (Pb2+) from aqueous solutions using chars obtained in the pyro...

Carbonaceous solid products resulting from thermochemical processes (pyrolysis, gasification), commonly known as chars, are emerging as low-cost sorbents of metallic contaminants, being their effectiveness already demonstrated in several studies (Inyang et al., 2012; Fuente-Cuesta et al., 2012; Ko³odyñska et al., 2012; Quek and Balasubramanian, 2009; Devecia and Kar, 2013). Given the fact that the commercial v...

Hydrogenation of rapeseed oil for production of liquid bio-chemicals

The main objective of rapeseed oil hydrogenation tests was the production of liquid bio-chemicals to be used as renewable raw material for the production of several chemicals and in chemical synthesis to substitute petroleum derived stuff. As, hydrogenation of vegetable oils is already applied for the production of biofuels, the work done focused in producing aromatic compounds, due to their economic value. The...

Characterization of chars produced in the co-pyrolysis of different wastes: dec...

The present work is devoted to the study of chars obtained in the co-pyrolysis of plastics, biomass and tyres wastes. The chars were extracted with several organic solvents in order to assess the more efficient in redicing the organic load of trhe chars and, therefore their toxicity. The ability of each selected extractant to remove toxic pollutants was evaluated by comparing the extracts yield and thoroughly ...

Hydrogenation of rapeseed oil

Rapeseed oil was rapeseed oil hydrogenated using a hydrogen pressure of 160psi, over a temperature range from 200ºC to 400ºC. Residence time was varied from 6 to 120 min. The reaction was performed in the absence and in the presence of specific inorganic catalyst. The gaseous liquid and solid yield were determined. The liquid phase was characterized using elemental analysis FT-IR, GC-HD (boiling point profile)...

Pyrolisis of plastic waste from the dismantling of used vehicles

The main objective of this study is to identify the experimental conditions that favor the production of bi-oil from pyrolisis of polypropylene (PP) coming from the scrapping of end-of-life vehicles. The experimental conditions tested were: initial pressure (2.1 to 10.3 bar), temperature (350 to 430ºC) and reaction time (1 to 900 s). The study reveals that the conditions that increase the rate of conversation o...

Chemical and bioassay fractionation of chars obtained in the co-pyrolysis of di...

The present work is devoted to the study chars obtained in the co-pyrolisis of plastics, biomass and tyres wastes. The composition of these chars is not yet well studied and only recent an attempt was made by the aithors to provide some information about the composition and risk assessment of these materials. The objectives of this work were to perform solvent extractions, using differents, in chars obtained i...

Chemical and ecotoxicological properties of ashes produced in the co-combustion...

Production of biosorbents from waste olive cake and its adsorption characterist...

In this study, waste olive cake (OC) was utilized as the raw material for the production of biosorbents by chemical treatment and its adsorption capacity for zinc ion was evaluated. Tests were conducted with the total biomass (T) and with the fraction > 2.00 mm (P), in order to determinate the influence of this fractionation step on subsequent treatments. Two chemical agents were used: sulfuric acid and sodium ...

Toxicity of Ashes Produced During the Combustion and Co-combustion of Coal and ...

The replacement of fossil fuels by renewable fuels can contribute to improve the environmental performance of the power production and to move forward in the sustainability way. The experience has shown that the availability of alternative fuels can be an obstacle for its extensive use for energy production, since biomass is not always available. The use of non-hazardous wastes may be a good alternative to biom...