Waste Symbiosis through the Synthesis of Highly Crystalline LTA and SOD Zeolites.

In recent years, the demand for natural and synthetic zeolites has surged due to their distinctive properties and myriad industrial applications. This research aims to synthesise crystalline zeolites by co-recycling two industrial wastes: salt slag (SS) and rice husk ash (RHA). Salt slag, a problematic by-product of secondary aluminium smelting, is classified as hazardous waste due to its reactive and leachable nature, though it is rich in aluminium.

Development of Lightweight Mortars Using Sustainable Low-Density Glass Aggregates from Secondary Raw Materials.

In this study, different lightweight expanded glass aggregates (LEGAs) were produced from glass cullet and various carbonated wastes, through a thermal impact process. The effects of LEGA microstructure and morphology on both the adherence to the cement paste and the mechanical properties of mortars after 28 days of curing were studied. The properties of lightweight mortars made of either LEGAs or expanded clay aggregates were compared.

[Outcomes of percutaneous balloon pulmonary valvuloplasty in pulmonary valve stenosis in the pediatric population in a single center, Lima - Peru].

Objective: To evaluate the effectiveness of the procedure and outcomes during follow-up.

Methods: 80 patients with pulmonary valvular stenosis who underwent percutaneous balloon valvuloplasty between January 2014 and December 2019 are described. Demographic, echocardiographic, and hemodynamic characteristics of the procedure were evaluated.

Use of a Waste-Derived Linde Type-A Immobilized in Agarose for the Remediation of Water Impacted by Coal Acid Mine Drainage at Pilot Scale.

A new adsorbent based on an immobilized waste-derived LTA zeolite in agarose (AG) has proven to be an innovative and efficient alternative for removing metallic contaminants from water impacted by acid mine drainage (AMD) because the immobilization prevents the solubilization of the zeolite in acidic media and eases its separation from the adsorbed solution. A pilot device was developed containing slices of the sorbent material [AG (1.5%)-LTA (8%)] to be used in a treatment system under an upward continuous flow.

Glass Lightweight Aggregates from Glass Cullet and Mining and Food Industry Carbonate Waste.

Lightweight aggregates are extensively used in construction and other industrial applications due to their technological characteristics. The extraction of natural aggregates results in serious environmental effects. Thus, within the circular economy concept, the valorization of waste through the optimization of materials and product design is encouraged.

Silicon Oxycarbide and Silicon Oxycarbonitride Materials under Concentrated Solar Radiation.

The potential application of silicon oxycarbonitride (SiOCN), silicon oxycarbide (SiOC) and silicon oxycarbide-SiC (SiOC-SiC) for photothermal devices such as volumetric solar absorbers has been studied evaluating the response to thermal shock from a Fresnel lens. The accelerated ageing test comprises fast heating (32 °C min) and cooling rates (27 °C min) from 100 to 1000 °C and dwelling times of 10 min. Porous materials (SiOCN and SiOC) failed the thermal shock tests; they were massively degraded by the formation of a large depression in the focus of solar radiation.

Highly efficient removal of aluminum, iron, and manganese ions using Linde type-A zeolite obtained from hazardous waste.

Coal acid mine drainage (AMD) contaminates natural water to form mine-impacted water (MIW), which is characterized by high levels of acidity, sulfate, and metallic ions. This study investigates the use of a Linde Type-A (LTA) zeolite obtained from a hazardous industrial waste for Al, Fe, and Mn removal from synthetic aqueous solutions. The aim of this study is to stablish a basis for the subsequent treatment of MIW in order to obtain reuse water.

Genetic Transformation in Peach ( L.): Challenges and Ways Forward.

Almost 30 years have passed since the first publication reporting regeneration of transformed peach plants. Nevertheless, the general applicability of genetic transformation of this species has not yet been established. Many strategies have been tested in order to obtain an efficient peach transformation system.

The application of thermal solar energy to high temperature processes: case study of the synthesis of alumina from boehmite.

The aim of this paper is to evaluate the feasibility of obtaining alumina from boehmite using a free, clean, and unlimited power source as the solar energy. Boehmite was obtained by hydrothermal treatment of a hazardous waste coming from aluminum slag milling. The waste is considered as a hazardous substance because of it releasing toxic gases (hydrogen, ammonia, methane, and hydrogen sulfide) in the presence of water.

Concerns on liquid mercury and mercury-containing wastes: a review of the treatment technologies for the safe storage.

Due to the adverse effects of mercury on human health and the environment, restrictive legislations and world-wide common efforts are now under way to reduce both the supply and demand of mercury. As a result, all excess Hg must be stored in safe conditions in secure places. This paper is an attempt to review the various treatment technologies types of liquid mercury (Hg(0)) and mercury-containing wastes, which can be used to store these residues in a safe way.

Dispersion-free solvent extraction of Cr(VI) from acidic solutions using hollow fiber contactor.

The use of dispersión-free solvent extraction, through microporous hydrophobic membrane has been investigated. The hollow fiber contactor, with surface area of 1.4 m2 was used to extract Cr(VI) (0.

Influence of indole-butyric acid and electro-pulse on in vitro rooting and development of olive (Olea europea L.) microshoots.

The effects of indole-butyric acid (IBA) and electro-pulses on rooting and shoot growth were studied in vitro, using olive shoot cultures. Tested shoots were obtained from seedlings belonging to three Spanish cultivars, 'Arbequina', 'Manzanilla de Sevilla' and 'Gordal Sevillana', which have easy-, medium- and difficult-to-root rooting abilities, respectively. The standard two-step rooting method (SRM), consisting of root induction in olive rooting medium supplemented with 0, 0.

[ENCOPREVENIMSS 2003. Reproductive health].

Objective: to analyze the current situation of some aspects of reproductive health in population covered by the Mexican Institute of Social Security (IMSS), based on the results of the National Survey of Coverage of Integrated Health Programs (ENCOPREVENIMSS) 2003.

Material And Methods: we collected and analyzed data on fertility, contraceptive practice and prenatal and puerperal care. For this purpose, we made specific files as follows: 5823 adolescents from 15 to 19 years old, 16,275 men from 20 to 59 years old and 16 866 women from 20 to 49 years old, of the total sample of 79,797 questionnaires of ENCOPREVENIMSS 2003.

Study of heterogeneities in steels and determination of soluble and total aluminium and titanium concentration by laser ablation inductively coupled plasma mass spectrometry.

A methodology for bulk analysis of Al and Ti and for determination of soluble and total Al and Ti concentration in steel samples by laser ablation inductively coupled plasma mass spectrometry was developed. The spatial distribution (both at surface and within the sample) of the insoluble fraction of Al and Ti was also qualitatively estimated. Certified reference materials (CRMs) SS-451 to 460 (carbon steel) and 064-1 (Nb/Ti interstitial free steel), from BAS, and JK 2D (carbon steel) and JK 37 (highly alloyed steel), from SIMR, were studied.

[Tuberculosis in immigrants: clinical and epidemiological differences as compared to the native population (1999-2002)].

Background: Tuberculosis in immigrants is an emerging disease in industrialized countries.

Method: We retrospectively analyzed the clinical and epidemiological characteristics of culture-positive tuberculosis cases in the immigrant and native populations.

Results: One hundred and five cases of tuberculosis were observed; 22 cases (21%) were in immigrants.