21 Dec

Raiders look to get leg up on Broncos, Marquette King with Johnny Townsend

first_imgFor complete Oakland Raiders coverage follow us on Flipboard.ALAMEDA — During a typical training camp day in 2012, a virtual unknown named Marquette King was drawing oohs and ahhs with skyscraping punts.After each thunderous kick, defensive tackle Tommy Kelly would shout, “Reggie Roby!” as an homage to the late and best-known African-American punter in NFL history.Kelly’s last one-liner on King was “Lookin’ for a job . . . . just not here!” Shane Lechler, the perennial Pro Bowl …last_img read more

18 Dec

Scientist gets mine drainage patent

first_imgProf Jannie Maree has successfully received a patent to treat acid mine drainage.(Image: www.savingwater.co.za) Masters students Vhahangwele Akin Bologo and Dineo Maila, with Prof Jannie Maree.(Image: Prof Jannie Maree) MEDIA CONTACTS • Professor Jannie Maree   Rand Water Chair, Faculty of Science, Tshwane University of Technology  +27 12 382 6343. RELATED ARTICLES • Working towards sustainable mining • CSIR at the World Water Forum • Mining history for new solutionsAneshree NaidooWhen the Witwatersrand Gold Rush began 127 years ago, it birthed the city of Johannesburg, affectionately known in Zulu as eGoli, the City of Gold. But years later, as the ground gave up its last golden nuggets, the abandoned mines have filled up with acidic water that poses a significant pollution threat to the city’s water resources.But South African academics and scientists have been hard at work on solutions to tackle the corrosive mining by-product, and one has successfully applied for, and received, a United States patent for an acid mine water treatment process.A world-leading scientific processProfessor Jannie Maree, Rand Water chair in water utilisation in Tshwane University of Technology’s Faculty of Science, says the magnesium-barium-hydroxide (MBO) process, which removes metals and sulphate from mine water, offered South Africa a technically sound and cost-effective solution for the acid mine water problem.Acid mine drainage is highly acidic water, usually containing high concentrations of metals, sulphides and salts from mining. This acid runoff also dissolves heavy metals such as copper, lead and mercury into ground or surface water, threatening the health of rivers by disrupting aquatic organisms’ growth and reproduction. Further problems include the acidic runoff corroding infrastructure like bridges. Most importantly though, the drainage pollutes groundwater, which contributes to the drinking water supply. In a water-poor country like South Africa this poses a significant problem.So much so that in his 2012 State of the Nation address South Africa’s President Zuma said that R248-million was to be invested over the next two years to deal with acid mine drainage on the Witwatersrand, an extensively mined area in the Greater Johannesburg Metropolitan Area in the province of Gauteng.Gold mining began in 1886 on the Witwatersrand, which stretches 50km from Krugersdorp to the west, to Boksburg to the east. From the 1950s mines across the region started closing down and the last remaining operational mine, East Rand Propriety Mines in Boksburg, closed its operations in 2008.During the mining period, there was infrastructure in place to pump water out of the mines. But as they closed down, the underground voids created from mining operations have filled up as the pumps have ceased. Accumulated water has also flowed into adjacent mines, filling up the entire void.Laboratory success, real world applicationMaree said removing metals and sulphate with the MBO process could produce water that contained levels low enough to be acceptable as drinking water. “This was provided the levels of sodium and chloride in the treated water was low.”He added that the “patented process was used with great success at laboratory level”, where water from coal and gold mines was used. The success of the process success was recorded in Tshwane University of Technology (TUT) postgraduate student Hangwi Bologo’s master’s dissertation.Maree describes the income-generating side to the process, saying “the saleable products from the process would be sulphur, calcium carbonate and the treated water. Depending on the water quality other saleable compounds could be metals and magnesium hydroxide.”He adds: “SA imports its sulphur. Sulphuric acid is produced from sulphur which is an important raw material in the manufacturing of fertiliser.”The water treatment stage is ready for full-scale implementation.  The thermal stage where barium sulphate is processed to barium hydroxide needs to be demonstrated on a pilot scale.  This will be done by September 2014. For full-scale implementation the process will compete with technologies such as reverse osmosis, ion exchange and biological sulphate removal.Acid drainage filtrationAnother academic working on, among others, the acid mine drainage problem, Professor Sunny Iyuke of the University of the Witwatersrand School of Chemical and Metallurgical Engineering, has, with the help of PhD students, developed a membrane to separate waste from water. The membrane has applications across industry, water purification and even medicine.According to Iyuke the membrane (similar to a household water filter) could be used to catch water waste from mines before it entered drains or the water table.last_img read more

3 Dec

Rain pounds Gujarat, throws life out of gear

first_imgGujarat continues to be battered by heavy rains causing floods. On Thursday, Ahmedabad received 200 mm of rainfall, flooding major parts of the city. The Centre has rushed three more teams of the National Disaster Response Force to the State.The toll in Banaskantha has reached 46 while in Patan district, five persons were washed away in the floods. The total toll has reached 150 in the State since June 1.“More than 10,000 people were relocated from vulnerable areas as a precautionary measure as torrential rain continues in the State,” said a senior government official, adding that more than 1,000 people were rescued by various agencies.‘Grim situation’“Situation continues to be grim because of constant rainfall. After north Gujarat and Saurashtra, the rain is now spreading to central and south Gujarat, causing floods there,” the official added.Portions of at least 20 buildings collapsed due to heavy rains and water-logging. Three persons were injured when a building crumbled in the Gaekwad Haveli locality in the early hours, Ahmedabad Chief Fire Officer M. Dastoor said.“Three persons were injured when a building collapsed in the city. Parts of nearly 20 buildings collapsed since midnight, while 64 trees have been uprooted. Eleven instances of fire were reported due to short-circuits,” he said.The government authorities have ordered all schools and colleges to remain closed in the affected areas. Examinations have also been postponed.As on Thursday, more than 300 roads were closed and hundreds of villages submerged in darkness due to power outage as floods have damaged the power distribution infrastructure.Chief Minister Vijay Rupani visited the affected areas in Ahmedabad and conducted inspection of rescue works. The administration has warned people against venturing out. The Ahmadabad Municipal Corporation issued a warning of heavy rains on Friday and asked people to stay indoors.According to Deputy Chief Minister Nitin Patel, 18 teams of the NDRF, six teams of the BSF, six columns of the Army, two teams of the Navy and over a dozen helicopters of the Air Force were involved in the rescue work across the State, mainly in the two worst affected districts of Patan and Banaskantha.The Ahmedabad airport runway was partly flooded due to heavy rains, though it did not affect the air traffic, its director Manoj Gangal said. Apart from Ahmedabad, Gandhinagar and Kheda also received heavy rainfall in the last 24 hours, affecting thousands of people who had to be relocated to safer areas.(With inputs from PTI)last_img read more

3 Dec

180 relief camps in flood-hit Tripura

first_imgTripura government has set up 180 relief camps to accommodate thousands of flood-affected people in the state. Chief Minister Biplab Kumar Deb on Wednesday made an aerial survey in north Tripura to take stock of the situation.Mr. Deb also visited Kailashahar in Unakoti district, the worst hit in the current floods. Numerous areas in Khowai, Dhalai and South Tripura districts were also submerged, rendering people homeless.Three people died and several injured over the past two days owing to incessant rains and landslides. The Chief Minister announced ex-gratia payment for the kin of the deceased.Officials said 6,054 families from submerged areas of the state were housed in the camps. “The state government has opened 180 relief camps in seven districts of Unakoti, North Tripura, Dhalai, Khowai, West Tripura, Gomati and South Tripura,” Sanjay Kumar Mishra, Officer on Special Duty to the Chief Minister, told The Hindu.last_img read more

24 Oct

Discussions Under Way for Aviation School in Jamaica

first_img Transport and Mining Minister, Hon. Robert Montague, says stakeholder discussions are under way for the establishment of a globally recognised aviation school in Jamaica. Story Highlights Mr. Montague advised that the consultations involve representatives of the Ministry of Finance and the Public Service, Airports Authority of Jamaica (AAJ), Jamaica Civil Aviation Authority (JCAA), Caribbean Maritime University (CMU), and two overseas institutions. He said this forms part of the Government’s plans to further boost the local aviation industry by establishing a world-class facility to train more Jamaican commercial pilots. Transport and Mining Minister, Hon. Robert Montague, says stakeholder discussions are under way for the establishment of a globally recognised aviation school in Jamaica.Mr. Montague advised that the consultations involve representatives of the Ministry of Finance and the Public Service, Airports Authority of Jamaica (AAJ), Jamaica Civil Aviation Authority (JCAA), Caribbean Maritime University (CMU), and two overseas institutions.He said this forms part of the Government’s plans to further boost the local aviation industry by establishing a world-class facility to train more Jamaican commercial pilots.The Minister was delivering the keynote address at the opening ceremony for the second annual two-day aviation seminar, jointly hosted by the AAJ, JCAA and Aeronautical Telecommunications Limited (AEROTEL) at the Courtleigh Auditorium in New Kingston on Thursday (December 6).Mr. Montague, who noted that Jamaican pilots have long established themselves among the best in the world, said data suggest that the global aviation industry is short of approximately 600,000 commercial pilots.He contended that Jamaica needs to tap into the potential opportunities that this presents. “We believe we are selling the industry short if we do not give to general aviation, more Jamaican pilots,” he added.Meanwhile, Mr. Montague said the Government has given the JCAA approval to seek a seat on the International Civil Aviation Organization (ICAO), when the elections are held next year in Montreal, Canada, where the ICAO is headquartered.The Minister, who indicated that “we are confident of victory”, said securing a seat would be a major boost for the country and the wider Caribbean.The two-day seminar, being held under the theme ‘Air Transport as an Engine of Economic Development in Jamaica and the Caribbean’, forms part of Jamaica’s observance of International Civil Aviation Day on December 7 by the United Nations (UN), in commemoration of the International Civil Aviation Organization’s establishment in 1944.last_img read more