Sentences with phrase «sands tailings»

Not exact matches

Norbert Morgenstern, a geotechnical engineering professor that presented the results, said liquefaction occurred because sand in the tailings dam was «loose, uncompacted and saturated.»

The low - lying basin was meant to capture the tailings, mostly sand and clay but also some toxic chemicals left over after removing most of the bitumen, or tarry oil, from the ore.

A Pembina Institute study from 2009 estimated the costs to reclaim what was then 686 square miles of oil sands developments and 170 square miles of tailings ponds would run as high as $ 15 billion.

The cost of reclaiming over 300,000 oil and gas wells in Alberta likely exceeds $ 70 billion, and the cost of cleaning up the toxic tailings ponds and other damage at the oil sands could reach similar levels.

Iluka Resources has opted to push ahead with its $ 425 million takeover of mineral sands rival Sierra Rutile despite identifying issues with two of the London - listed company's tailings dams.

Tailings A watery by - product of oil sands processing, containing traces of oil and a host of other pollutants.

The indoor radon action levels for US homes and schools were adopted in response to the use of radioactive uranium mill tailings sand in construction and soil fill for homes and schools in the western US; recognized in the 1970's as one of the first direct community health risks from the process of uranium mining.

Plus the tar sands operations have gigantic tailings and wastewater ponds which are loaded with various types of petrochemicals.

It must heat several barrels of water to strip the bitumen from the sand and upgrade it, and afterward it discharges contaminated water into tailings ponds like the one near Mildred Lake.

Mature fine tailings are the big problem for oil sands extraction.

A tailings pond near Fort McMurray, Alberta, where the oil sands boom has faded because of low oil prices.

Consequently, oil sands mines are surrounded by vast tailings ponds....

Shell Canada has started its commercial - scale Atmospheric Fines Drying field demonstration for managing tailings from its oil sands operations.

Tailings are a mixture of fine clay, sands, water and residual bitumen produced through... Read more →

Sources of air contaminant emissions from oil sands developments include industrial smokestacks, tailings ponds, transportation, and dust from mining operations.

The tailings ponds where the cleaned sand is returned look ugly for a few years but are eventually reclaimed into grasslands.

Tar sands mines create as much toxic tailings every day as flows over Niagara Falls in 90 seconds.

Mining and processing tar sands also create a toxic sludge called tailings.

Their migration route intersects with areas leased to and developed by oil sands companies, including the surface mineable area and its associated facilities, mine pits and tailings ponds.

From toxic tailings ponds that already cover 130 square kilometres, to fresh water use and the direct impacts of digging 100 metre open pit mines over thousands of square kilometres of boreal forest, the report details the environmental problems and other challenges that oil sands mining poses to northern Alberta.

Oil - sands production emits roughly three times the carbon dioxide of conventional light - oil production and the strip - mining operations involved destroy the landscape in northern Alberta, creating large tailings ponds filled with toxic wastewater.