1-hydroxydodecylidene-1,1-diphosphonic acid (HDDPA) was prepared and first applied in flotation of hemimorphite. HDDPA exhibited superior flotation performances for recovery of hemimorphite in comparison with lauric acid, and it also possessed good selectivity against quartz flotation under pH 7.0–11.0. Contact angle results revealed that HDDPA preferred to attach on hemimorphite rather than qu...

The kinetics of leaching zinc from hemimorphite was investigated. factors that influence were also evaluated, and a kinetic model built. In addition, scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) used to investigate the changes surface morphology before after leaching. By decreasing particle size increasing temperature, 5-sulfosalicylic acid concentration, stirring speed...

At elevated temperatures, the ionic liquid precursor (ILP) tetrabutylammonium hydroxide reacts with zinc acetate and the glass wall of the reaction vessel. While the reaction of OH with the glass wall is not surprising as such and could be considered a failed experiment, the resulting materials are interesting for a variety of applications. If done on purpose and under controlled conditions, th...

The present study addresses the direct flotation route for the concentration of a zinc silicate ore. Flotation of hemimorphite faces some challenges due to the similarity of hemimorphite and quartz surface properties. XRD, and XRF analyses, optical mineralogy and SEM with X-ray mapping were performed for characterization. The results showed that the quartz, hemimorphite, calcite and dolomite ar...

Biochar is considered to be a promising material for heavy metal immobilization in soil. However, the immobilization mechanisms of Zn(2+) on biochars derived from many common waste biomasses are not completely understood. Herein, biochars (denoted as PN350, PN550, WS350, and WS550) derived from pine needle (PN) and wheat straw (WS) were prepared at two pyrolysis temperatures (350 °C and 550 °C)...

Smithsonite exhibits an extensive range of colours in nature. The internal features, spectral characteristic, and trace elements several coloured smithsonites (e.g., white, blue, blue-green, yellow, orange, pink) from Lanping District, Yunnan Province, China, were analysed the relationship between smithsonite colour and/or impurities was discussed this research. presence iron manganese closely ...