Artificial weathering pools of calcium-rich industrial waste for CO2 sequestration

Processes of carbonation of calcium-rich aqueous industrial wastes from acetylene production were performed mimicking rock weathering, using the atmospheric carbon dioxide as reactant. This residue was carbonated exposing it to the air in artificial pools with controlled solid-to-liquid and surface-to-volume ratios, and the efficiency of this simple mineral carbonation process was maximized. Considering realistic values of just one acetylene production plant, the intelligent handling of the calcium-rich waste would make it possible to counteract the emission of around 800t of carbon dioxide per year, so the CO2 emissions of the acetylene production could be completely compensated and its carbon footprint significantly reduced.X-ray diffraction patterns and thermogravimetric analyses reported the conversion, up to 88%, of the calcium hydroxide into calcium carbonate under atmospheric conditions. So, considering a realistic industrial scale-up, 476kg of CO2 could be captured with 1t of dry waste. The morphology of the grains is resolved by electron microscopy, and can be described as needles 15nm wide and 200nm long arranged in grains smaller than 1 micron. We exploit these nanometric textural parameters (nanometric pores and particles having a specific surface area ∼50m2/g) to design an efficient carbon fixation procedure. The aim of this work is to propose this simple carbonation technology, based on aqueous alkaline industrial waste, as a contribution to reducing global CO2 emissions.Junta de Andalucía TEP115Ministerio de Ciencia e Innovación PIA42008-3

Development of bronchiectasis during long-term rituximab treatment for rheumatoid arthritis

Here the cases of three female patients who received long-term rituximab treatment for seropositive, erosive and deforming rheumatoid arthritis was reported. After rituximab treatment, they presented with recurrent sinusitis and pneumonia, followed by the subsequent development of bronchiectasis. A temporal relationship between rituximab treatment and the onset of respiratory complications was exposed as a possible pathogenic mechanism

Bioactivity of wollastonite/aerogels composites obtained from a TEOS-MTES matrix

Organic-inorganic hybrid materials were synthesized by controlled hydrolysis of tetraethoxysilane (TEOS), methyltrimethoxysilane (MTES), synthetic wollastonite powders and polydimethylsiloxane (PDMS) in an ethanol solution. Aerogels were prepared from acid hydrolysis of TEOS and MTES with different volume ratio in ethanol, followed by addition of wollastonite powder and PDMS in order to obtain aerogels with 20 wt% of PDMS and 5 wt% of CaO of the total silica. Finally, when the wet gels were obtained, they were supercritically dried at 260°C and 90 bar, in ethanol. In order to obtain its bioactivity, one method for surface activation is based on a wet chemical alkaline treatment. The particular interest of this study is that we introduce hybrid aerogels, in a 1 M solution of NaOH, for 30 s at room temperature. We evaluate the bioactivity of TEOS-MTES aerogel when immersed in a static volume of simulated body fluid (SBF). An apatite layer of spherical-shaped particles of uniform size smaller than 5 microns is observed to form on the surface of the aerogels after 25 days soaking in SBF.Ministerio de Ciencia e Innovación MAT2005-01583Junta de Andalucía TEP 79

Dos casos de Newcastle en humanos en Colombia.

El presente trabajo describe la contaminación de Newcastle sufrida por dos médicos veterinarios, como consecuencia de la necropsia practicada en aves afectadas procedentes de diferentes brotes de campo. La sintomatología en los dos casos fué similar a la descrita en la literatura, el período de la incubación fué de 24 a 48 horas, se presentó conjuntivitis unilateral y el curso de la enfermedad fué de una semana aproximadamente. Hubo variaciones en la sintomatología sistemática, en uno de los casos se presentó afección de las vías aéreas superiores y en el otro no. En los dos casos se detectaron anticuerpos por la prueba de inhibición de la hemaglutinación. Por primera vez se confirma en Colombia la infección de Newcastle en humanos, mediante la prueba de inhibición de la hemaglutinación.Ganado de doble propósito-Ganaderia doble proposit

New method for carbon dioxide mineralization based on phosphogypsum and aluminium-rich industrial wastes resulting in valuable carbonated by-products

A new carbon mineralization method was designed based on a sequestration agent synthesised exclusively from industrial wastes. Phosphogypsum waste from the fertiliser industry was dissolved into caustic aqueous waste from the aluminium anodising industry. The resulting precipitate consisted of katoite (Ca3Al2(OH)12, a Si-free hydrogrossular solid solution end-member of the Al-containing hydrogarnet) and thenardite (Na2SO4); the latter easily removed by rinsing with water. The carbonation performance of this katoite-rich sequestration agent was evaluated using two different methods, by bubbling in aqueous media and by weathering. Both procedures yielded high carbonation efficiencies (80% and 100%, respectively), and resulted in a solid precipitate composed primarily of calcite (CaCO3) and aluminium hydroxide (Al(OH)3). Priority attention was given to the transfer of trace elements and radionuclides of the uranium series typically present in the phosphogypsum. Results confirmed that the traces were transferred to resulting final solid carbonate at concentrations similar to those present in the raw phosphogypsum. In conclusion, these carbonated minerals would trap substantial amounts of CO2 and produce final materials with similar civil engineering uses to those proposed for current phosphogypsum wastes. This work offers new methods for jointly managing specific industrial wastes oriented to more sustainable industrial processes and controlling CO2 emissionsPeer reviewe

Rozwój rozstrzeni oskrzeli w wyniku długoterminowego leczenia reumatoidalnego zapalenia stawów rytuksymabem

W pracy przedstawiono przypadki trzech kobiet, które były leczone rytuksymabem z powodu seropozytywnego, erozyjnego, deformującego, reumatoidalnego zapalenia stawów. Po terapii rytuksymabem u pacjentek wystąpiło nawracające zapalenie zatok i zapalenie płuc, a następnie rozstrzenie oskrzeli. Czasowy związek między terapią rytuksymabem a początkiem powikłań ze strony układu oddechowego doprowadził do uznania leku za możliwy mechanizm patogenny.W pracy przedstawiono przypadki trzech kobiet, które były leczone rytuksymabem z powodu seropozytywnego, erozyjnego, deformującego, reumatoidalnego zapalenia stawów. Po terapii rytuksymabem u pacjentek wystąpiło nawracające zapalenie zatok i zapalenie płuc, a następnie rozstrzenie oskrzeli. Czasowy związek między terapią rytuksymabem a początkiem powikłań ze strony układu oddechowego doprowadził do uznania leku za możliwy mechanizm patogenny

Natural banks of commercial marine invertebrates, La Libertad Region, Peru (December 2018)

En la Región La Libertad la pesca artesanal es muy importante como medio de vida de diversas comunidades costeras. Los principales recursos bentónicos son cangrejo violáceo, caracol negro y pulpo, los que, luego de muchos años de extracción intensiva, además de los efectos por el cambio climático, eventos como el Niño y La Niña, presentan diversos grados de alteración, limitando su sostenibilidad. La información que se obtiene de los monitoreos y seguimientos ayudan a proponer alternativas para manejar de manera efectiva la pesquería de esos recursos. El área de estudio estuvo comprendida desde La Granja (Puémape) (7°9’35,4”S – 79°41’8,2”W) hasta islas Guañape (8°56’25,8”S - 78°41’49,4”W). Las especies monitoreadas Platyxanthus orbignyi cangrejo violáceo, Thaisella chocolata caracol negro y Octopus mimus pulpo, presentaron biomasas y densidades reducidas, además de la presencia de elevado porcentaje de ejemplares menores a la TME o PME. El comportamiento térmico indicó condiciones oceanográficas cálidas asociadas a concentraciones de oxígeno superiores en un rango de 2 a 7 mL/L, que sugiere presencia de aguas de mezcla entre aguas costeras frías (acf) y aguas cálidas.ABSTRACT: In the La Libertad Region (Peru) artisanal fishing serves as a crucial livelihood for various coastal communities. The primary benthic resources include purple crabs, black snails, and octopuses. Following extensive years of extraction and the impact of climate change, including occurrences such as El Niño and La Niña, these resources exhibit various levels of alteration, hindering their sustainability. Data from monitoring and surveillance activities aid in proposing effective management strategies for these resources. The study area spanned from La Granja (Puémape) (7°9’35.4”S – 79°41’8.2”W) to the Guañape islands (8°56'25.8"S - 78°41'49.4"W). Monitored species, including Platyxanthus orbignyi, Thaisella chocolata, and Octopus mimus, demonstrated reduced biomasses and densities, accompanied by a high proportion of individuals below the Minimum Legal Size (MLS) or Precautionary Minimum Exploitable (PME). Thermal behavior indicated warm oceanographic conditions with elevated oxygen concentrations ranging between 2 and 7 mL/L, suggesting the presence of mixing waters (ccw + warmer waters)

New method for carbon dioxide mineralization based on phosphogypsum and aluminium-rich industrial wastes resulting in valuable carbonated by-products

A new carbon mineralization method was designed based on a sequestration agent synthesised exclusively from industrial wastes. Phosphogypsum waste from the fertiliser industry was dissolved into caustic aqueous waste from the aluminium anodising industry. The resulting precipitate consisted of katoite (Ca3Al2(OH)12, a Si-free hydrogrossular solid solution end-member of the Al-containing hydrogarnet) and thenardite (Na2SO4); the latter easily removed by rinsing with water. The carbonation performance of this katoite-rich sequestration agent was evaluated using two different methods, by bubbling in aqueous media and by weathering. Both procedures yielded high carbonation efficiencies (80% and 100%, respectively), and resulted in a solid precipitate composed primarily of calcite (CaCO3) and aluminium hydroxide (Al(OH)3). Priority attention was given to the transfer of trace elements and radionuclides of the uranium series typically present in the phosphogypsum. Results confirmed that the traces were transferred to resulting final solid carbonate at concentrations similar to those present in the raw phosphogypsum. In conclusion, these carbonated minerals would trap substantial amounts of CO2 and produce final materials with similar civil engineering uses to those proposed for current phosphogypsum wastes. This work offers new methods for jointly managing specific industrial wastes oriented to more sustainable industrial processes and controlling CO2 emissionsGobierno de España MAT2013-42934- RJunta de Andalucía P12-RNM-226

Reinforced silica-carbon nanotube monolithic aerogels synthesised by rapid controlled gelation

This work introduces a new synthesis procedure for obtaining homogeneous silica hybrid aerogels with carbon nanotube contents up to 2.50 wt.%. The inclusion of nanotubes in the highly porous silica matrix was performed by a two-step sol–gel process, resulting in samples with densities below 80 mg/cm3. The structural analyses (N2 physisorption and SEM) revealed the hierarchical structure of the porous matrix formed by nanoparticles arranged in clusters of 100 and 300 nm in size, specific surface areas around 600 m2/g and porous volumes above 4.0 cm3/g. In addition, a relevant increase on the mechanical performance was found, and an increment of 50% for the compressive strength and 90% for the maximum deformation were measured by uniaxial compression. This reinforcement was possible thanks to the outstanding dispersion of the CNT within the silica matrix and the formation of Si–O–C bridges between nanotubes and silica matrix, as suggested by FTIR. Therefore, the original synthesis procedure introduced in this work allows the fabrication of highly porous hybrid materials loaded with carbon nanotubes homogeneously distributed in the space, which remain available for a variety of technological applications