Copper mining produces significant amounts of associate waste, leading to the construction huge waste dumps in highly seismic zone Andes Mountains. To analyze stability these deposits, it is necessary characterize mechanical properties materials laboratory, which quite difficult due large size particles composing structures. In this study, global mine analyzed by means discrete element simulati...

Global demand for petroleum keeps increasing while traditional supplies decline. One alternative to the use of conventional crude oils is the utilization of Canadian bitumen. Raw bitumen is a dense, viscous, semi-liquid that is diluted with lighter crude oil to permit its transport through pipelines to terminals where it can then be shipped to global markets. When spilled, it naturally weathers...

The principal use of water by the petroleum refining industry in the United States of America is in the refining branch itself, and the present paper is concerned with problems arising from this use of water, and some of the measures being taken by the industry to solve these problems. The compilation oftheManualonDisposalof Refinery Wastes is briefly alludedto, and the importance ofrecirculati...

iii ITINERARY We assemble and depart from the parking lot of Student Union building on the Dalhousie University campus at 7:30 am on Sunday (May 15 th), and conclude at approximately 7:30 pm at the same location that day. The drive from Halifax to the first stop is about 2 hours. SAFETY For personal and group safety we ask all participants to read and heed the following safety related procedure...

In mining, froth flotation is the largest tonnage separation process used to separate valuable minerals from waste rock [...]

Bioaccessible U, Th, Pb and the 238U decay products 214Pb and 210Pb have been determined, using a modified Unified BARGE Method (UBM), in waste solids and soils from an abandoned uranium mine in South West England, UK. Maximum aqua regia extractable concentrations for U, Th and Pb were 16,200, 3.8 and 4750 μg g-1, respectively. 238U had highest activity concentrations near the mine shaft, where...

Swelling clays play a major role in current concepts for the underground disposal of high-level nuclear waste in deep geological formations. In one of the multi-barrier concepts for preventing the escape of radioactive substances from a high-level nuclear waste repository, the barrier consists of a copper container, compacted bentonite as buffer and backfill (the engineered barrier), and the re...