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?FEATURED UPD COE FACULTY PUBLICATION

Check out Dr. Djoan Kate Tungpalan et al.'s new publication entitled "The Role of Vein-Type Mineralisation in Mineral Liberation" published on Minerals Engineering, Elsevier, Volume 116.

? The article is accessible within library networks and via remote access on https://doi.org/10.1016/j.mineng.2017.07.001

? Highlights:

• Veins contribute to an increased degree of liberation.
• Veins allow liberation to occur at coarser particle size.
• The scale at which liberation analysis is undertaken is important.
• Core scale textural data improves prediction in geometallurgical characterisation.
• Veins can be used as proxy to liberation in geometallurgical characterisation.

Abstract:

This paper provides a further investigation of the role of vein structures in the ease of mineral liberation by random masking simulation of breakage. A copper porphyry ore with vein-type mineralisation underwent different methods of sample preparation for liberation analysis. A selected core was cut into semicircular slabs and another core underwent crushing. The slabs and the crushed particles were analysed in the MLA and subjected to simulated breakage from which the liberation of sulphides was determined. The result was linked with the liberation measured from particles of the same ore that have undergone actual breakage. The analysis further provided an indication of the significant contribution of veins in liberation. This information points out to a proper approach of texture and liberation analyses, and the better use of textural data from core scale logging relevant to mineral processing.

Dr. Djoan Kate Tungpalan is an Assistant Professor in the Department of Mining, Metallurgical, and Materials Engineering.

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Tungpalan

Check out Dr. Joey D. Ocon et al.'s new publication entitled "Electrochemical Oxidation Remediation of Real Wastewater Effluents — A Review" published on Process Safety and Environmental Protection, Elsevier, Volume 340.

The article is accessible within library networks and via remote access on https://doi.org/10.1016/j.psep.2017.09.014

 Highlights:

• Exhaustive review of applied electrochemical oxidation to treat actual effluents.
• Electrogenerated active chlorine species and hydroxyl radicals are the main oxidants of organic pollutants.
• Disinfection of wastewaters also feasible by electrochemical oxidation.
• Combined electrochemical oxidation with other technologies as integrated, pre- or post-treatment.

Abstract:

Fate and health risks associated with persistent organic pollutants present in water effluents are one of the major environmental challenges of this century. In this paper, the electrochemical advanced oxidation process electrochemical oxidation is reviewed for its performance over the treatment of actual industrial and urban effluents. The electrochemical treatment of industrial effluents resulting from textile dyeing, petrochemical, paper mill, tannery industry as well as the treatment of domestic and urban wastewaters are discussed. Furthermore, the combination of electrochemical oxidation with other water treatment technologies as pre-treatment, post-treatment, and integrated treatment is also examined.

Graphical Abstract:



Dr. Joey D. Ocon is an Assistant Professor in the Department of Chemical Engineering.

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Check out Dr. Mary Donnabelle L. Balela et al.'s new publication entitled "Surface Modification of ZnO Nanostructured Film Prepared by Hot Water Oxidation" published on Surface and Coatings Technology, Elsevier, Volume 340.

The article is accessible within library networks and via remote access on https://doi.org/10.1016/j.surfcoat.2018.02.055

 

Highlights:

•ZnO nanostructured films were fabricated via hot water oxidation of etched Zn foil.
•Morphology was tuned by varying the solution pH and reaction time, and adding ZnCl2.
•Stearic acid and 1-hexadecene turned superhydrophilic ZnO films superhydrophobic.
•Treated ZnO nanostructured films had static water contact angles as high as 156.62°.
•Superhydrophobicity of treated ZnO films was stable even after mechanical abrasion.

Abstract: 

ZnO nanostructured films with tunable morphology were fabricated using hot water oxidation of etched Zn foils at 90 °C under varying solution conditions. At high pH, coarse ZnO nanostructured film, consisting of short nanorods, was produced. When the pH was lowered to about 3.8, no ZnO nanostructures were produced. On the other hand, a 1D-2D composite ZnO nanostructured film, consisting of nanorods and nanosheets, was formed by adding 0.05 to 0.20 M ZnCl2 during hot water oxidation. Increasing the ZnCl2 concentration further produced simonkolleite platelets instead of ZnO. The as-synthesized ZnO nanostructured films showed excellent wettability with static water contact angle ranging from 0 to 22.37°. Surface modification with stearic acid and 1-hexadecene under UV illumination effectively altered the wetting properties of the ZnO nanostructured films, resulting to superhydrophobic surfaces with static water contact angles of 149.90–156.62° and contact angle hysteresis as low as 1.63°. The 1-hexadecene-treated pencil-like ZnO nanorods achieved the highest water contact angle and retained its superhydrophobicity even after mechanical abrasion.

Graphical Abstract:

Unlabelled Image

 

Dr. Mary Donnabelle L. Balela is an Associate Professor in the Department of Mining, Metallurgical, and Materials Engineering.

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Balela

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