A new approach was developed for quantitatively converting alkylated arsenic to arsenic acid (AsV). Conversion of the organic As species to AsV was required to prevent bias in the ICP-OES measurements because the species in the calibration standard was AsV. The approach was used in the developme...

High arsenic-containing waste acid from the heavy nonferrous metallurgical sector (Cu, Pb, Zn, Ni, Sn, etc.), one of the most dangerous arsenic hazardous wastes with extremely high arsenic concentrations, has presented enormous challenges to the environment and caused severe environmental pollut...

Arsenic-contaminated sulfuric acid solutions are produced in large quantities as by-product during pyrometallurgical processing of sulfide minerals. Options for re-using such acid solutions are increased if the arsenic is removed and recovered as a product. The performances of tributyl phosphate...

Large amounts of waste acids with high acidity and arsenic levels are produced during pyrometallurgy of nonferrous metal sulfide ores, in which the treatment of arsenic remains a problem. In this study, copper powder was used as a reducing agent and synergized with iodine ions to effectively rem...

Pulse-current sintering under cyclic uniaxial pressure (PCS-cyclic) was applied to p-type Bi2−xSbxTe3 (x = 1.5, 1.6, and 1.7) to obtain sintered materials with preferred crystal orientation. PCS-cyclic was performed at 673 K for 10 min under cyclic uniaxial pressure of 100 MPa. X-ray diffraction...

In this study we report the microstructure and the thermoelectric properties of p-type Bi-Sb-Te 60 nm nanowires using ion track-etched polycarbonate templates for fixed applied potentials. A mixture of Bi+III, Sb+III and Te+IV in specific tartaric-nitric acid electrolyte was prepared in order to...

Defects such as planar faults in thermoelectric materials improve their performance by scattering phonons with short and medium mean free paths (3∼100 nm), thereby reducing the lattice thermal conductivity,κl. Understanding statistically the microscopic distribution of these extended defects w...

Veegum HV and Veegum F suspensions, 2 per cent by weight in water, were found to be pseudoplastic at all ages for all temperatures of preparation and storage. The study is reported over the time range of a few hours to several months for temperatures from 6 to 88°. The logarithm of the apparent...

Investigation of commercially produced hydrolysis salts of aluminum by solid-state 27Al NMR spectroscopy and size-exclusion chromatography (SEC) reveals well-defined and distinct Al environments that can be related to physicochemical properties. 27Al MAS and MQ-MAS NMR spectroscopic data show th...

We study the drying and film formation of a model ternary system comprising an inorganic salt (aluminium chlorohydrate, ACH), a humectant (glycerol) and water. Employing viscometric, X-ray diffraction, calorimetric, dynamic vapour sorption, spectroscopic, gravimetric and adhesion measurements, w...

Coal-based carbon molecular sieves (CMS) were modified by organic reagents with affinities for hydrocarbons including tetracosane (C24), lauryl sodium sulfate (SDS), and polyethylene imine (PEI), and low temperature plasma treatment in a CH4 and N2 atmosphere, respectively. The modified CMS samp...

HZSM-5/MCM-41 molecular sieve (H-ZM) catalysts with well-defined micro/mesoporous structures were synthesized and showed high performance for selective synthesis of triacetin via the esterification reaction of glycerol with acetic acid. The conversion of glycerol was demonstrated to be 100% and ...

In present work, Post-treatment method was employed to prepare sulfur-doped carbon spheres (CS-S). Moreover, CO2 activation was performed on the products to increase their surface area and enhance their adsorption properties. The structures of products have been characterized using EDS, FE-SEM, ...

While Prussian Blue (PB) analogues are attractive catalysts for activating peroxymonosulfate (PMS), PB analogues are very small and thus difficult for recovery. Immobilizing PB particles onto graphene is a useful technique which facilitates recovery and also enhances catalytic activities. As dop...

A number of ultramarine paint samples were analysed by Raman spectroscopy and X-ray photoelectron spectroscopy to determine the binding energies of the S3.− (blue) and S2.− (yellow) radical anions responsible for the pigment colour. The two sulphur radicals (chromophores) have well assigned Rama...

As a rising star in the field of quantum dots, carbon quantum dots (CQDs) have attracted increasing advertence in recent years. In this work, sodium sulfide (Na2S) was used as the sulfur source for the first time to synthesize sulfur-doped carbon quantum dots (S-CQDs) with stable blue fluorescen...

This study focused on the effect of steam on the transformation of sulfur during pyrolysis of demineralized coal in a horizontal tube furnace within the range of temperatures from 300 to 800 °C. The main sulfur-containing products in the resulting pyrolysis gases including H2S, SO2, and COS wer...

Lithium-sulfur battery has attracted notable attention because of its high special capacity (1675 mAh g−1). However, polysulfide dissolution and low electronic conductivity of sulfur cathode usually cause significant capacity fading during cycling. In this paper, we introduce a double-shelled st...

Development of polymer based mid-wavelength infrared (MWIR) optics has been limited mainly due to high optical loss of organic polymers used in general optical components. In this study, a MWIR polarization grating based on a sulfuric polymer poly(sulfur-random-(1,3-diisopropenylbenzene)) with a...

Carbon matrices have attracted the attention enthusiastically as the improver materials of sulfur for rechargeable lithium-sulfur battery. In this work, various morphologies (sphere, fiber, tube and layer) based carbon materials have been used for preparing the sulfur-carbon binary composites vi...