J. A. Rodríguez-Añón

University of Santiago de Compostela | USC · Department of Applied Physics

The next generation of ionic liquids must be synthetized taking into account structures that guarantee the suitable properties for a defined application as well as ecological data. Thus, searching of the right methodologies to know, quickly and efficiently, the ecological effects of these compounds is a preliminary task. The effects of two imidazol...

The study of mechanisms of soil organic matter (SOM) stabilization is a topic of increasing interest due to its direct involvement in the carbon (C) sequestration capacity linked to a certain soil management. It comprises knowledge about SOM properties from different perspectives and their connection with the SOM biodegradability. The highly comple...

The environmental concern on soil exploitation, linked to global warming by the Kyoto protocol, is responsible for increasing interest in the understanding of the role of the composition and structure of the soil organic matter (SOM) on soil carbon, C, dynamics. Thermal analysis and nuclear magnetic resonance (NMR) are applied to study the thermal...

The rational and sustainable exploitation of natural resources is one the priority objectives of our consumer society as an unavoidable strategy for survival. In previous articles, research group TERBIPROMAT has established the bases for the elaboration of energy maps of forest biomass. With those data, it is possible to classify the species in ter...

Soil carbon is the largest reservoir of organic carbon on the planet and CO2 production by soil thus has potentially large effects on atmospheric CO2. Carbon sequestration in soil is determined by the metabolic efficiency (substrate carbon conversion efficiency) of soil micro-organisms. That could be measured by calorespirometric methodology (paral...

The rheological behaviour of the materials diglycidil ether of bisphenol A (n = 0), 1, 2 diamine-cyclohexane and the epoxy reactive diluent vinylcyclohexane dioxide have been studied both separately and mixed before the beginning of the curing reaction. Different kinds of tests such as: preshear and time sweep, flow curve and stress sweep experimen...

Isothermal and Differential Scanning Calorimetry is applied to analyze the evolution of soil using its microorganisms and organic matter as bioindicators of soil quality. This study was carried out with two similar soils under different agricultural activities: culture and pasture. Sampling and measurements were performed through 1 year in order to...

The thermal degradation of the epoxy system diglycidyl ether of bisphenol A (DGEBA n=0) and m-xylylenediamine (mXDA) containing different concentrations of polyhedral oligomeric silsesquioxanes (POSS) nanoparticles was studied by thermogravimetric analysis in order to determine the influence of both, the POSS concentration and the curing cycle on t...

Differential scanning calorimetry was applied to assess on seasonally soil organic matter changes. Soils were collected in two sites located in Viveiro (Galicia, Spain). One of them has been used as arable land and the other one was under pinewood. Soil samples were seasonally collected during a year. The heat of combustion and the ignition tempera...

In 1989, Prof. Lisardo Núñez and his Research Group TERBIPROMAT designed an experimental procedure to evaluate the energy contained in Municipal Solid Waste (MSW) generated in Galicia (NW Spain) using a static bomb calorimeter in an oxygen atmosphere following the procedure described by Hubbard et al. (1958).In the last time, this experimental proc...

This work is a ‘historical’ revision of the evolution of an experimental procedure developed by Prof. Lisardo Núñez and his research group TERBIPROMAT to study the sustainability and the soil health state. From the very beginning, in 1993, the microbial activity was the main bioindicator selected to analyse the ‘soil health state’. For this reason...

The diffusive, calorimetric and thermal degradation behavior of different epoxy-amine systems was investigated during water sorption at different temperatures (23, 40 and 70°C). Experimental results showed that the water absorption at these temperatures fitted well to Fick’s law. Influence of water immersion during different periods of time on the...

Microcalorimetry was used to study the seasonal evolution over one year of the microbial activity in a humic-eutrophic Cambisol soil as a function of its forest cover. The study was carried out on three soils with identical origin but covered with different forest species: pine, eucalyptus, and a typical Atlantic-humid riverside forest. Some other...

The microcalorimetric technique was used to analyse the influence of successive reforestations with Eucalyptus globulus Labill, a fast growing species, on the microbial activity in soil. With this aim, samples of similar origin soils, humic-eutrophic Cambisol, were collected from two adjacent land plots. One of the plots, to be taken as the referen...

The design of a rigorous experimental procedure is the basis for any environmental study. In this work, the basic criteria are established for determination of soil health using microcalorimetry as the main technique complemented by the study of physical (temperature, moisture, porosity, hydraulic conductivity, density and plasticity), chemical (pH...

The European policy on energy focus on the search for alternative and renewable sources of energy where forest biomass plays a significant role. In this article, calorific values of different kinds of forest residues (leaves, thin branches, barks, etc.) are reported. These values were measured by combustion bomb calorimetry with the objective of un...

Summary Soil productivity and health were analyzed using an experimental procedure designed for this kind of studies. The continuous loss of fertile soil obliged the Food and Agriculture Organization (FAO) to declare soil as an item to be protected as a support of the world society welfare. The procedure here described is in accordance with the pre...

A method is proposed for calculation of risk indices of different forest formations existing in Galicia. These values are helpful to predict the behaviour of forest species in case of forest fires and thus to prevent and/or fight these wildfires.Main parameters for calculation of risk indices are calorific values measured by bomb calorimetry and fl...

The rational and sustainable exploitation of nature resources is one of the priority objectives of our society. In this article a method is proposed to evaluate and exploit the energetic resources contained in different forest formations. This method is based on the use of a combustion bomb calorimeter to determine the calorific values of the diffe...

In this study we present an alternative for the management of the excess of shrub species that nowadays take up around 800000 ha in Galicia (NW Spain). This alternative is based on the exploitation of the energetic resources contained in the excess of shrubs by their combustion in specially designed plants for production of electric energy. The dif...

Pine residues originated from cuts and forestry tasks were studied with the main objective of using them as an alternative source of energy. Calorific values were measured using a static bomb calorimeter in an oxygen atmosphere. From these measurements a value of 7500 kJkg(-1) for the mean lower heating value of these kind of residues was found. A...

This paper shows an application of bomb calorimetry used in the procedure of regeneration of waste industrial mineral oils. Using the treatment here reported a recovery of nearly 50% of the used oils was achieved. Furthermore, the oils so recovered contain concentrations of potentially contaminant elements far below the requirements of the European...

The possibility of retrieving the energy contained in forest residues originating from wood exploitation in Galicia (Spain) is evaluated. This study was made on Eucalyptus globulus Labill occupying a forest surface of 240000 ha. This species plays an important role in the economical development of Galicia, as it is the main forest species for produ...

Wildfires are mainly responsible for economical and ecological disasters both in forests and forest resources all over the world. In this article, we report a method which allows the calculation of risk indices to be used in campaigns designed for preventing and/or fighting forest fires. The method is based on the determination of calorific values...

Calorific values and flammability changes during a year for forest waste originating from silviculture task in Galicia (NW Spain) are reported. These waste materials are becoming to be used as alternative fuels. The present study was made on several hardwood forest species. These forest species occupy nowadays approximately 30% of the total forest...

Calorific values of forest waste originating from forestry works such as woodland cleaning, reaforestation and, all other silviculture tasks, were measured by static bomb calorimetry. These waste materials, heretofore considered as useless refuse, are beginning to be used as alternative fuels in wide social sectors all over the world. Two of the ma...

A process designed for regeneration of used oils, and particularly synthetic oils originated from the automobile industry, is presented. These synthetic oils constitute 45% of the total waste oils originated in Spain. The main objective of the process is to obtain a new fuel capable of being used in internal combustion engines for cogeneration of e...

Risk indices corresponding to the forest biomass in the hill area of Galicia were determined. The use of these indices allows the design of risk index maps, very useful for the prevention of, and effective fight against, forest fires. These parameters are complemented with chemical analyses based on the elementary composition, concentration of heav...

Risk indices for the different forest species existing in a high mountainous zone situated in Galicia (NW Spain) as well as their seasonal evolution were studied. Calculation of these risk indices was based on the previous elaboration of energy maps from mean calorific values, flammabilities and chemical analyses of forest species. A combined study...

The thermochemical parameters: calorific values and flammability, elementary chemical composition and heavy metal contents during the seasons of the year for the different forest species which make up the woodland map of the northern coast of Galicia (Spain) are reported. These data, together with bioclimatic conditions of the zone, were used to el...

The heating values of municipal solid waste generated in three towns with a population of less than 50 000, situated in Galicia (Spain), were measured with a static bomb calorimeter. Samples of raw refuse were burnt either as received or after sorting of the different combustible components. A study was made of samples from controlled and uncontrol...

Calorific value, flammability and chemical composition during the seasons of the year for the different forest species which make up the woodland map of two zones, Devesa da Rogueira (continental high mountainous zone) and As Neves (humid atlantic zone), situated in Galicia (Spain), are reported. The species characteristic of the zones are: Sorbus...

From the peak reaction temperatures as a function of heating rate, the activation energies were obtained for a system consisting of an epoxy resin (Badgen=0) and a curing agent (isophorone diamine), using a Perkin Elmer DSC7 operated in the dynamic mode. At the same time, the Arrhenius law was used to calculate rate constants.

In this paper are reported changes in heat values (HV) with the seasons of the year for the different species which make up most of the undergrowth in Galicia (Spain). Knowledge of these values is essential when evaluating the possibility of exploiting the energy content of the bushes in energy-recovery plants.The calorific values of combustion at...

Following a method based on the procedure given by Hubbardet al. [1] the calorific values of combustion in oxygen at 298.15 K were measured by static-bomb calorimetry for forest residues. This waste mainly coming from mount reforestation, construction of firebreaks, etc., constitutes an important risk to originate forest fire. From combustion exper...

Mechanical behaviour play an important role in the election of an epoxidic formulation of well determined properties as it has a marked influence on both structural and external factors. Temperature and time strongly act on polymers properties owing to their viscoelastic nature. Knowledge of the dynamic moduli and properties of polymeric material...

At present, the calorific values of a variety of combustible solid or liquid substances are determined at commercial laboratories with conventional combustion bomb calorimetric techniques using gram‐size samples. This paper describes the process to calculate the calorific value of Municipal Solid Waste (MSW). Samples of raw refuse were burnt firstl...