WARREN H. CHESNER Chesner Engineering, P.C. This paper presents an overview of a recently pat­ ented technology which defines the process of using selected waste products to assist in reclaiming existing municipal solid waste landfill sites [1]. The process in­ volves the pressurized injection of these materials into the void spaces of existing landfill sites to both manage the waste product an...

Rare earth elements (REE) have been recognised as critical raw materials, crucial for many clean technologies. As the gap between their global demand and supply increases, the search for their alternative resources becomes more and more important, especially for the countries which depend highly on their import. Coal fly ash (CFA), which when not utilised is considered waste, has been regarded ...

INTRODUCTION It is important, for mining feasibility studies, to be able to accurately convert in situ coal volumes to tonnages using coal densities. The density of coal of c”nstant rank varies depending on the am”unt of included rock (mineral matter), water, and void porosity. Actual measurements of density often require adjustment because data are needed at different ash, water or porosity va...

The South African mining industry has been the backbone of the country’s economy for much of the past century. Mining has, however, often caused the degradation of productive soils. The amendment of these soils is often very expensive and often not sustainable. The University of Pretoria in cooperation with Eskom TSI, has over the past seven years conducted a series of trials. These trials have...

The results of a theoretical study of the formation and growth of the submicron flyash aerosol around a single burning coal particle are presented. The vaporization of ash and subsequent aerosol formation near the coal particle are studied because the local combustion environment influences these proewes strongly. A mathematical model is developed that describes the transport of ash vapor and a...

Batch adsorption of recalcitrant melanoidin using the abundantly available coal fly ash was carried out. It had low specific surface area (SBET) of 1.7287 m2/g and pore volume of 0.002245 cm3/g while qualitative evaluation of the predominant phases in it was done by XRD analysis. Colour removal efficiency was found to be dependent on various factors studied. Maximum colour removal was achieved ...

The proportion of amorphous or glassy material in a series of fly ashes has been evaluated by X-ray powder diffraction (XRD) using several different sample preparation and processing methods in conjunction with the Rietveld-based Siroquant quantitative X-ray diffraction analysis software package. The results of the different methods used were found to give consistent results and were also in ag...

Biosorption of heavy metals using dried algal biomass has been extensively described but rarely implemented. We contend this is because available algal biomass is a valuable product with a ready market. Therefore, we considered an alternative and practical approach to algal bioremediation in which algae were cultured directly in the waste water stream. We cultured three species of algae with an...