Nanotechnology Water Treatment Articles
-
The Role of Graphene in Advancing Nanotechnology
What is Graphene? Graphene is a two-dimensional carbon nanomaterial composed of carbon atoms in a hexagonal honeycomb lattice with special hybrid orbitals. It has excellent optical, electrical, and mechanical properties. Materials with light weight, strongest toughness, best light transmittance, and best electrical and thermal conductivity have important application prospects in materials ...
By Matexcel
-
Basic information of Scandium
Scandium (Sc, atomic number 21) is a rare earth element with atomic weight 44.955908. Its melting point is 2,806°F (1,541°C). The appearance of its metal form is silvery-white while slightly yellowish or pinkish cast when oxidized in air. It can be dissolved slowly in most dilute acids. Similar to the early founded lanthan and yttrium, in the fullerene cluster, scandium shows as +3 metal ...
-
Classification of iron oxide aerosols by a single particle soot photometer using supervised machine learning
Abstract. Single particle soot photometers (SP2) use laser-induced incandescence to detect aerosols on a single particle basis. Both refractory black carbon (rBC) and other light absorbing metallic aerosols, including iron oxides (FeOx), have been characterized by the SP2, but single particles cannot be unambiguously identified from their incandescent peak height (a function of particle mass) and ...
-
Comments on 2011 Proposed SNURs Prompt Proposal Regarding Hierarchy of Controls
On July 28, 2016, the U.S. Environmental Protection Agency (EPA) proposed changes to the existing regulations governing significant new uses of chemical substances under the Toxic Substances Control Act (TSCA) to align these regulations with revisions to the Occupational Safety and Health Administration’s (OSHA) Hazard Communications Standard (HCS), as well as changes to the OSHA ...
-
What makes TERS `shine` today?
After more than 15 years since TERS had its first proof of concept, HORIBA Scientific and AIST-NT have created a solution that brings TERS as an analytical method to a completely new level. TERS is not only able to perform so-called point measurements, but now TERS spectra can be collected in every single pixel of a scan map. A TERS map is composed of more than tens of thousands Raman spectra, ...
-
EC JRC Publishes Options for the Review of the EC Nanomaterial Definition
The European Commission (EC) Joint Research Center (JRC) announced on July 10, 2015, the publication of its third report in its review of the EC recommendation on the definition of a nanomaterial. The report is the last in a series of three, and provides scientific support to the EC in its review of the definition used to identify materials for which special provisions might apply (e.g., for ...
-
Fullerene associated phenanthrene contributes to bioaccumulation but not toxic to fish
The current studies investigated the effects of aqueous fullerene suspensions (nC60) on the bioavailability and toxicity of phenanthrene (Phe) to junior carp (Cyprinus carpio). The bioaccumulation factors (BAFs) were calculated based on total as well as free concentration of Phe. The equal BAF values were obtained with and without nC60 based on the total concentrations, whereas greater BAFs ...
-
Theoretical investigations on C60‐ionic liquid interactions and their impacts on C60 dispersion behavior
Increased use and production of carbon nanomaterials (e.g. fullerene C60) and ionic liquids (ILs) may result in their concomitant releases into the environment. Inevitably there will be interactions between carbon nanoparticles (CNPs) and ILs. However, experimental data about the interaction of CNPs with ILs are not readily available, and the mechanism behind the interactions is still elusive. ...
-
The effects of humic acid on the uptake and depuration of fullerene aqueous suspensions in two aquatic organisms
We investigated the uptake and depuration of fullerene aqueous suspensions (nC60) in two aquatic organisms: Daphnia magna (Daphnia) and zebrafish. The effects of humic acid (HA) were examined to elucidate its possible mechanisms in the aquatic environment. The uptake was concentration‐dependent in both organisms, and the maximum uptake concentration of nC60 in Daphnia (2268 ± 158 mg/kg) was ...
-
Bioaccumulation of fullerene (C60) and corresponding catalase elevation in Lumbriculus variegatus
Fullerene (C60) with its unique physical properties and nanometer size has been mass produced for many applications in recent decades. The increased likelihood of direct fullerenes release into the environment has raised interest in understanding both environmental fate and corresponding biological effects of fullerenes to living organisms. Since few studies have emphasized fullerene uptake ...
-
Interaction of functionalized fullerenes and metal accumulation in Daphnia magna
In aquatic environments, transformation of pollutants by associating with functionalized carbon‐based nanoparticles can dramatically change their cycling pathways. The present study quantified the uptake and depuration behavior of cadmium (Cd) and zinc (Zn) bound with functionalized fullerene nanoparticles (f‐nC60) in a freshwater cladoceran Daphnia magna in the well dispersed medium. Metal ...
-
Monitoring and Treatment of Selected Nanoparticles
With their increasing use, nanoparticles will become concentrated in urban effluents in the future. Both adequate monitoring methods and water treatment technologies will be necessary to assess and avoid consumer exposure. This paper reports results in these two challenging areas for both organic and inorganic nanoparticles. Treatment experiments indicate that lamellar settling is better adapted ...
-
The study on increase low permeability reservoir adsorption ability with nano–polymerisation emulsion
Low permeability reservoirs always have some problems such as long–termed high injection pressure, low injection rate, the great variation of injection pressure during the water injection because of the compact and complicated structure. So it is necessary to reduce injection pressure and augment injection rate. Water–based nanometre polysilicon break through the limitation of organic scattered ...
-
Effects of lipid composition on partitioning of fullerene between water and lipid membranes
Fullerene partition coefficients (Klipw) between water and solid supported lipid membranes were determined for membranes of various lipid types and composition over a range of temperatures. The log Klipw (L/kg) values for fullerene, which range from 3.1 to 5.3, depend on the lipid type in the lipid membranes. Partition coefficients increased with increasing temperature, increasing acyl chain ...
-
Slightly hydrophobic silica nanoparticles for enhanced oil recovery: interfacial and rheological behaviour
This paper is aimed at studying AEROSIL® R816 nanoparticle behaviour to see if it has enough feasibility to be used as a chemical agent in enhanced oil recovery (EOR) processes. The main focus is on interfacial and rheological behaviour of this particle in aqueous and polymeric media. Interfacial tension measurements between aqueous nanoparticle suspensions and oil showed that AEROSIL® R816 ...
-
Environmental implications and applications of carbon nanomaterials in water treatment
Carbon nanomaterials have been proposed as a basis for developing new technologies for photocatalytic oxidation and disinfection, improved membrane processes, adsorbents, and biofilm-resistant surfaces. This study details recent progress towards the development of these proposed applications. We explored the use of carbon nanomaterials such as fullerene C60, single-wall carbon nanotubes (SWCNTs), ...
-
Improvement of a pesticide immunosensor performance using site–directed antibody immobilisation and carbon nanotubes
The potential toxicity of pesticide residues in drinking water has meant a rigid regulation for the appearance of these pollutants. Thus, in this work, we developed a new immunosensor for atrazine detection. We focused on the optimisation of the antibody immobilisation method on sensor surface for the enhancement of the biosensor sensitivity. First, with site–directed immobilisation of rabbit ...
-
Study on synthesis and photocatalytic activity of novel visible light sensitive photocatalyst Ag
3PO4Silver orthophosphate nanoparticles have been synthesised by precipitation of AgNO3 and H3PO4 in presence of oleylamine and other solvents like toluene, and ethanol at room temperature. Particle sizes of silver orthophosphate nanocrystals can be controlled by adjusting the amount of water. The products were characterised by XRD, UV–Vis, FESEM and EDX. The characterisation results showed that the ...
-
A screening study on the fate of fullerenes (nC60) and their toxic implications in natural freshwaters
Increasing usage of fullerenes (C60) increases their opportunities to be released into the environment. For risk assessment, it is important to understand the environmental fate and ecotoxicological effects of C60. In this study, fullerene settling was measured during a one‐year period with four different lake waters and an artificial freshwater, and D. magna immobilization and fullerene ...
-
Investigation of removal of N–nitrosamines and their precursors in water treatments using activated carbon nanoparticles
N–nitrosamines have been detected in various water types. A strategy for removal of this group of compounds should be taken to reduce the health risks for humans. In this study, a fast and sensitive LC–MS/MS method was developed for quantitative analysis of nine N–nitrosamines and four precursors in a single sample. The Method Detection Limits (MDLs) in natural water ranged from ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you