Electronic waste

This study presents the adsorption process of methylene blue and other organic pigments in water samples using synthetic materials derived from agricultural waste combined with Fe3O4. The properties of the materials were determined through Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and nitrogen adsorption-desorption isotherm.

10p dianmotminh02 03-05-2024 3 1   Download

Sugarcane bagasse ash (SCBA) is an industrial waste that consists of silicon oxides, calcium, aluminum, iron, magnesium, and alkali metal oxides. The composition and structure of thermomechanical treated SCBA was analyzed by X-ray fluorescence (XRF), Scanning Electron Microscopy (SEM) and X-Ray diffraction (XRD). Thermomechanical treated SCBA was mixed with clay, quartz and feldspar at different compositions according to an appropriate mixing ratio and using this mixture for the production of dry pressed ceramic tiles.

6p dianmotminh02 03-05-2024 5 1   Download

In this work, a bimetallic Ni-Cu-BDC metal-organic framework system was developed via solvent thermal approach with using an organic ligand recycled from waste plastic. The physical properties of Cu-BDC and bimetallic Ni-Cu-BDC were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and N2 isotherms adsorption-desorption (BET).

6p dianmotminh02 03-05-2024 3 1   Download

The acid-treated PG was neutralized by NaOH and CO2 aeration, creating CaCO3 in situ nano-microparticles identified by scanning electron microscopy (SEM) images and CaCO3 intensity by X-ray diffraction (XRD). In this study, the cement mortar test, which used treated PG from both sulfuric treatment and NaOH neutralization within CO2 aeration, has better compressive strength properties and hydration supported by SEM images, XRD results, and thermogravimetric analysis.

8p dianmotminh02 03-05-2024 3 2   Download

Ebook "Applications of EPR in radiation research" presented in eight themes: elementary radiation processes (in situ and low temperature radiolysis, quantum solids); solid state radiation chemistry (crystalline, amorphous and heterogeneous systems); biochemistry, biophysics and biology applications (radicals in biomaterials, spin trapping, free-radical-induced DNA damage); materials science (polymeric and electronic materials, materials for treatment of nuclear waste, irradiated food);...

766p nhanphanguyet 28-01-2024 5 2   Download

Rice husk (RH), an inexpensive waste material, was used to produce nanosilica that was then applied to fabricate composite with natural rubber. The optimization of process parameters on the weight of nanosilica using the Taguchi method was performed. Experimental specimens were then made to confirm optimum values for each process parameter.

6p vidoctorstrange 06-05-2023 4 2   Download

The spongy nanocomposite materials based on Al2O3 hybridized with stearic acid were synthesized by a hydrothermal method combined with a sol-gel combustion method. The characteristics of the materials were determined by standard methods such as Fouriertransform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM).

8p viblackwidow 07-04-2023 6 2   Download

In the paper, zeolite ZSM-5 has been synthesized in laboratory. Its structure is then modified by irradiating with electron beam at the different energies and fluences (F). To perform the irradiation process on the electron beam (EB) linear accelerator (UERL-10-15S2), the simultaneous energy degrading and sample containing holde was calculated and designed by MCNP simulation before irradiation.

7p vicedric 08-02-2023 8 3   Download

This article has reviewed the progress that has been made in bioleaching research of metals using filamentous fungi. This review has focused on fungal bioleaching from various metal sources, including mine tailings, electronic waste, solid mine wastes, spent catalysts, and low-grade ores. Filamentous fungi are used in bioleaching due to their ability to secrete organic acids and facilitate the solubilization of metal ions from the solution phase.

15p thebadguys 15-01-2022 9 0   Download

In India, the quantity of “E-Waste” or Electronic Waste has now become a major problem. Electronic wastes (E-Wastes) typically include discarded computer monitors, motherboards, mobile phones and charges, compact discs, headphones, television sets, A.C. and refrigerators. Only 20 percent of global E-Waste is recycled. In India most of the waste electronic items are stored at households as people do not know how to discard them. This ever-increasing waste is very complex in nature and is also a rich source of metals.

7p chauchaungayxua12 29-07-2021 12 2   Download

This research presented some results on the physicomechanical properties and environmental pH effects of unburned materials made from WS, FA, and WG binder. The bonding and microstructure of the materials had to be studied by Fourier infrared spectroscopy (FTIR) and scanning electron microscope (SEM).

8p nguaconbaynhay12 13-06-2021 12 1   Download

In this research, rice husk, abandoned and available agriculture waste, were developed into activated carbon using microwave methods. The optimal experimental parameters such as pH, contact time, activated carbon dose, and temperature were investigated. The activated carbon was characterized by scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) analysis. The maximum adsorption capacities toward methylene blue was 6.13 mg g-1 . The experimental data fitted the Freundlich equation well, although the Langmuir equation could also describe them.

5p caygaocaolon11 18-04-2021 13 2   Download

"Waste treatments waste" – the reuse of waste could bring a number of environmental and economical benefits such as reducing waste and treatment cost in many industrial sectors. This study made use of steel slag as treatment material for polluted waste.

9p tamynhan4 06-09-2020 7 1   Download

This study aimed to evaluate the ability of magnesium chloride modified carbonized rice hull (MCRH) material for ammonium removal from synthetic and domestic wastewater. The MCRH material was prepared by using waste rice hull from a household rice-processing factory and magnesium chloride salt via a simple mixing and annealing method. The material was then characterized by scanning electron microscopy and energy-dispersive X-ray spectroscopy.

11p angicungduoc5 13-06-2020 11 2   Download

Natural based composites of hydroxyapatite/Gum Arabic designed for removal of toxic metal arsenic (III) from waste water were synthesized and evaluated. Several composites with various compositions were prepared by the wet chemical method and analyzed using various spectroscopic and analytical methods such as: Fourier transform infrared spectroscopy, total organic carbon production, XRD analysis and scanning electron microscope.

13p vijiraiya2711 27-05-2020 17 0   Download

Waste recycle have been strongly focusing in Vietnam. However secondary environmental effects of the recycling activities have been debatable. This study produces a life cycle inventory (LCI) data set of polyethylene terephthalate (PET) packages in the country with further analysis for biggest PET users such as electronic sectors and/or food processing sectors. Loop recycling allocations are approached to calculate GHGs emission and solid waste in the life cycle of 1 ton of PET packages.

7p abcxyz123_02 03-03-2020 17 0   Download

In this study, high temperature oxidation-resistant NiCr/Al duplex coatings on carbon steel substrate have been fabricated by electrical wire arc-spraying process. The oxidation resistance properties of NiCr/Al duplex coating system have been evaluated at 800 °C during retention times of 1.5, 3.0, 4.5 and 6.0 hours. The morphology and chemical composition of their cross-sectional structures were investigated using scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS).

10p kequaidan3 06-03-2020 24 0   Download

To investigate the attention-deficit/hyperactivity disorder (ADHD) status among preschool-aged children in Guiyu, an electronic waste (e-waste) recycling town in Guangdong, China.

8p vichengshin2711 26-02-2020 10 0   Download

Collagen from fish is attracting a lot of attention thanks to its high absorbance ability, biocompatibility as well as non-religious obstruction and cheap sources. It could be applied in many fields, for example: food, cosmetic, or biomedicine. Using of collagen also helps reduce the environment pollution from fish scale waste in fish processing. In this study, collagen extracted from Vietnamese fresh-water tilapia fish scales was used in combination with carrageenan for the improvement of drug release control.

8p chauchaungayxua2 07-01-2020 36 1   Download

The aim of this study was to produce isotactic polypropylene based composites filled with waste thermosetting bulk moulded composite (BMC). The influence of BMC waste addition (5, 10, 20 wt%) on composites structure and properties was investigated. Moreover, additional studies of chemical treatment of the filler were prepared. Modification of BMC waste by calcium stearate (CaSt) powder allows to assess the possibility of the production of composites with better dispersion of the filler and more uniform properties.

8p kequaidan1 16-11-2019 15 1   Download