Metal science

This research was undertaken to determine the concentrations of heavy metal ions in the surface water and sediment in water bodies that receive wastewater from the Dinh Tram and Pho Noi A industrial zones. The pollution status of the heavy metal ions and their potential ecological risks were evaluated by using the potential ecological risk index (RI) and risk assessment code (RAC).

11p vibecca 01-10-2024 8 2   Download

This study investigated trace essential metals (Cu, Zn and Cr) and non-essential metals (Pb, Cd and Hg) in water, sediment and tissues of water spinach, snake head fish and swamp eel from the Saigon River. Sampling was conducted from January to December 2004 at three sites. Three water and sediment samples, edible parts of twenty water spinach (Ipomea aquatica) samples (leaves and stems), twenty snake head fish (Channa striata) and twenty swamp eels (Monopterus albus) were collected at each site.

148p runthenight07 01-03-2023 15 3   Download

The main aim of this investigation was to develop a low-cost solution to remove trace metals from the aqueous phase using biochar. This study investigated (i) the effect of giant reed-based biochar produced at varying temperatures in the treatment of aqueous solutions polluted with lead; and (ii) how the production of biochar at different temperatures affected its adsorption capacity for lead from the aqueous phase.

116p runthenight04 02-02-2023 20 4   Download

Scope of thesis: Fabrication and characteristics of single-layer nitride hard coating with multi-components (TiAlXN (X: Si, B, V)) and multi-layer nitride hard coating with multi-components TiAlXN/CrN (X: Si, B) with high hardness and low friction coefficient; to determine the influence of main parameters on the properties of coatings.

25p beloveinhouse01 15-08-2021 16 3   Download

Purpose of the research: Researching to build and use cognitive problems of non-metallic chemistry to develop problem solving skill for students, contributing to innovating teaching and learning methods at high schools in accordance with the orientation of developing capacity.

27p tunelove 10-06-2021 24 4   Download

The goal of the thesis: The thesis examined the effect of different nanostructured morphologies in conductive polymer films (PPy, PANi) on NH3 gas sensitivity. The thesis fabricated the nanostructured hybrid films between metal oxide (NiO) and conductive polymer (PPy) successfully and examined the NH3 gas sensitivity properties of the NiO / PPy hybrid film.

28p extraenglish 24-05-2021 31 3   Download

In Vietnam, currently the study of fuel cells is almost neglected and there is very little fundamental research on this issue. The research on fuel cells of our country is at innitial stage, mainly researching catalytic material in the laboratory and almost has not research in the technology of manufacturing fuel cell (stack).

28p larachdumlanat129 20-01-2021 26 5   Download

Research thesis and apply positive teaching methods into teaching Chemistry in order to develop problem-solving and creativity capacity for high school students in Northwest Vietnam.

28p gaocaolon6 30-07-2020 51 5   Download

The thesis aims to produce nanoparticles (dielectric, ferrites, ferromagnetic, metal) and their nanoparticles. Find the optimal technology process, suitable for making absorbent samples. Survey the basic properties of fabricated nanomaterials. Measuring and studying the effects of microwave absorption in magnetic-dielectric nanoparticles, absorption mechanisms and dependence of absorbing properties on the parameters of materials, thereby finding solutions Enhance absorption capacity as well as adjust absorption parameters.

28p xacxuoc4321 09-07-2019 30 4   Download

The aim of the study was to investigate the crystallization kinetics and solidification behaviour of Fe60Co8Mo5Zr10W2B15 bulk glass forming alloy. The solidification behaviour in near-equilibrium and non-equilibrium cooling conditions was studied. The eutectic and peritectic reactions were found to exist in the solidification sequence of the alloy. The bulk metallic glass formation was achieved by using two methods: quenching from the liquid state and quenching from the semi-state.

140p dontetvui 21-01-2013 85 13   Download

Tuyển tập các báo cáo nghiên cứu khoa học ngành y học tạp chí Medical Sciences dành cho các bạn sinh viên ngành y tham khảo đề tài: Trace Elements, Heavy Metals and Vitamin Levels in Patients with Coronary Artery Disease....

5p thulanh9 07-10-2011 41 4   Download

Examine the cause and effects of the release of an industrial cyanide/heavy metals impoundment into a major European river system. • Examine the heavy metals release from a tailings dam failure in Southwestern Spain. • Describe the science and toxicological impacts of ionizing radiation resulting from radionuclides.

10p nguyenvanquan037 07-01-2011 99 4   Download