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

16 Dec

United Nations Targets Inefficient Light Bulbs

first_img RELATED ARTICLES “Once all the lighting sockets in these countries contain LED light bulbs, the amount of electricity saved would be equivalent to Mexico’s annual electricity consumption,” he said.More stringent efficiency requirements for light bulbs should produce results quickly, he added, because incandescents and halogen bulbs burn out quickly — within a year or two. That allows a rapid transition to less wasteful alternatives. The effort also should help developing countries “avoid being the dumping ground for energy-wasting bulbs banned in other nations,” Horowitz wrote.He told Greentech Media that at least a dozen countries are now drafting laws or regulations based on the U.N.-backed guidelines. The United for Efficiency (U4E) project also plans to develop model regulations for refrigerators, air conditioners, and other products in the future. California Gets New Light Bulb Efficiency StandardMartin’s 10 Rules of LightingGreen Basics: Lighting and Phantom LoadsLED Filament BulbsFuture of LEDs: Lower Cost, Higher Efficacycenter_img Regulators in the U.S. and Europe are winning their war on inefficient light bulbs as halogens and incandescent bulbs are being replaced by more efficient alternatives. Globally, sales of incandescent bulbs have dropped by more than 80%, from 12 billion bulbs a year to 2 billion.In many parts of the world, however, inefficient bulbs are still easy to find, and that’s prompted an effort by a United Nations group to help developing countries in Asia, Africa, and Latin America pass their own efficiency standards phasing out old-style bulbs, Greentech Media reports.At a conference in Copenhagen last month, the U.N. Environment Programme, the Natural Resources Defense Council (NRDC), and Signify (formerly Philips Lighting) released Model Regulation Guidelines intended to help countries transition to more efficient general service lighting. (Industrial, office, and street lighting would be covered in future model regulations.)Noah Horowitz, senior scientist and director of the NRDC’s Center for Energy Efficiency Standards, explained the model regulation in a blog posted at the NRDC website last month, noting that billions of inefficient bulbs are still being sold.“While regulations that phase out future sales of these inefficient bulbs are due to go into effect throughout the European Union later this year and in the United States in 2020 (and are already in effect in California), similar policies do not exist in most developing and emerging economies,” he wrote.In the U.S., a standard that takes effect in 2020 sets a minimum energy efficiency of 45 lumens per watt, several times more efficient than a typical incandescent bulb. Europe will ban certain halogen lamps this September.The model regulation gives participating countries two options: one allowing only LED light sources and the second permitting both LEDs and compact fluorescents, which aren’t as efficient and also contain small amounts of mercury. Lighting represents 15% of all electricity used worldwide. Potential savings from adopting higher efficiency standards in countries that currently don’t have them would be $18 billion in electricity costs and more than 160 million tons of avoided carbon dioxide emissions annually, Horowitz said.last_img read more

9 Dec

How to Play the Long Game

first_img“You’re an animal like the other animals or you’re something different, something higher, and known to be different and higher. Someone has to be the good guy.” Peggy Noonan, A Flawed Report’s Important Lesson, WSJ, December 12, 2014Some of your competitors will lie to win a deal. They will say whatever they believe their prospective client wants to hear, knowing it isn’t the truth. You may be frustrated knowing that they’re lying and winning.Some businesses you compete against will act immoral, and some will take actions that are illegal, all to make a buck. Their success may get a lot of press, and it might look pretty in the papers right now.Some of your competitors will speak poorly of you and your business to win an opportunity. You may be frustrated and angry to learn that a competitor is trying to make themselves look better by trying to make you look bad.Some people will tell their prospective clients what they want to hear in order to ingratiate themselves to that person. The would rather have their business than tell them what they really need to hear.None of these tactics are effective long term. In fact, over time these tactics undo those who use them. Someone may effectively lie to win a deal, but over time that lie will be exposed, and the person who lied will no longer be credible. People and companies that try to win by using tactics that are illegal or immoral get a different kind of press when these actions are exposed. Eventually, you are going to judged by who you are, not what your competitors say about you. And, eventually, your dream clients are going to need to know the truth about what they need to change and how much it is going to cost.You can’t control the tactics that other people or companies use to pursue and win new business. The only thing that you can control is who you are going to be. If you decide to be something different and higher, you will be known for being those things, even if it takes time for this to be known.Character is the long game. Who you are going to be has nothing to do with the decisions that other people make about who they are going to be. Your character is your business.Legacy is the longest of long games. The difference that you are going to make is solely up to you, and it has nothing whatsoever to do with the fact that other people aren’t considering their legacy. Your legacy is your business. Essential Reading! Get my 2nd book: The Lost Art of Closing “In The Lost Art of Closing, Anthony proves that the final commitment can actually be one of the easiest parts of the sales process—if you’ve set it up properly with other commitments that have to happen long before the close. The key is to lead customers through a series of necessary steps designed to prevent a purchase stall.” Buy Nowlast_img read more

3 Dec

Bhima-Koregaon violence: prime accused Milind Ekbote arrested

first_imgThe District Rural Police on Wednesday arrested Milind Ekbote, the prime accused in the Bhima-Koregaon violence of January 1 this year. The Supreme Court had on Wednesday cancelled his interim bail relief. Ekbote was picked up from his home in Pune’s Shivajinagar area Thursday morning.Two FIRs were lodged against Ekbote, who is the executive president of Samasta Hindu Aghadi outfit, for allegedly orchestrating the riots which left one person dead. The apex court quashed any further extensions of Ekbote’s bail relief after the State prosecutor submitted that he had not cooperated with the probe agencies, and had refused to hand over the mobile phone, claiming that he had apparently “lost” the phone.He is to be produced before the Pune Sessions Court later in the day.Police sources further said that Ekbote had been summoned at least five times for interrogation, but had not cooperated after one session with the investigating authorities on February 23.Earlier on January 22, his anticipatory bail application was rejected by the Pune Sessions court and again by the Bombay High Court on February 2.On February 6, the Pune sessions court issued an arrest warrant for Ekbote, who then moved the Supreme Court for interim bail the next day which was granted to him.The Pune Rural police had booked him under Sections 307, 143, 148, 149, and 295 of the IPC, and the Prevention of Atrocities Act, based on complaints filed at various police stations on January 1.Last month, while extending his bail relief, the Supreme Court had rapped the State government and probe agencies for their tardy progress in their probe against Ekbote, questioning the agencies’ claims that he was allegedly ‘untraceable’.last_img read more

28 Nov

LG G3 vs Samsung Galaxy S5: A screen battle is on the cards

first_imgAlmost all flagship smartphones for the year 2014 from giants like Samsung, HTC, Apple, Sony and LG are out. However, Apple is rumoured to launch its next iPhone on September 19 this year. Most of these phones were launched with new features and better specifications leading to a specs war.Models pose with LG G3 smartphones.The latest launch is from the South Korean tech giant LG Electronics, which has launched its 2014 flagship, the LG G3 this week with some new features. A few months ago, perhaps the most talked about smartphone of the year, the Samsung Galaxy S5, from another South Korean tech leader was launched. Samsung has been claiming that its S5 has been as successful as its 2013 flagship, the Galaxy S4.Must read – LG G3 smartphone: Five features to notice Check out – Samsung Galaxy S5: Ten things to notice LG G3 versus Samsung Galaxy S5 is a battle between two titans from the same land–South Korea.Samsung Galaxy S5The first thing we look for in a phone is its price. While the Samsung Galaxy S5 was launched for Rs 51,500 in India,  the price of LG G3 is yet to be announced officially. Its India launch is not confirmed.  LG G3 smartphones during launch.Screen battle: With the 5.1-inch Full HD Super AMOLED screen (1920 by 1080 pixel resolution) with a slim bezel and Adaptive Display, Samsung claims to provide a superior viewing experience in Galaxy S5. The LG G3 comes with a quad HD 5.5-inch screen having a 2560×1440 pixel resolution. The G3 may trigger a screen resolution war. This is the first time a phone screen has got a pixel density of 534 per inch.advertisementCamera: The LG G3’s main camera stands at 13-meagpixels same as the LG 2. But this time LG has come up with some interesting additions to its 2014 flagship phone. As per its claims, the G3 can grab focus in 276-millisecond. The Galaxy S5 sports a 16-megapixel main camera. What makes its camera different is its auto-focus speed which, as Samsung claims, is 0.3 seconds.  Water Resistant: The Samsung Galaxy S5 claims to be a certified water and dust resistant handset, whereas the LG chose not to include water resistance feature to avoid sacrifice of “other key features and functions”. So, it defied the trend.Internal Storage, RAM: Both the G3 and Samsung Galaxy S5 come in 16GB and 32GB variants with expandable memory via microSD cards. RAM storage can be expanded using microSD cards. The LG smartphone comes with 2GB and 3GB RAM options wherein the Galaxy all variants of the Galaxy S5 have 2GB of RAM.Battery: This is the biggest area of concern for any smartphone users. They all want a long lasting battery. The LG G3 has a 3,000mAh battery where as the Galaxy S5 comes with a 2800mAh battery.Others: The Galaxy S5 comes with features like health monitor and fingerprint scanner. These are not available on the G3. However, LG’s smart keyboard which it claims to reduce input errors by up to 75 per cent by tracking and analysing typing habits and intuitively “knowing” what word the user intended to type and feature to adjust the height of the keyboard to better fit the user’s hands is unique.On the other specifications front, both the smartphones are almost the same as both are powered by a Qualcomm Snapdragon 801 processor.last_img read more

7 Nov

Cowboys lasso Titans to claim back-to-back titles

first_img@Eden_RichardsThe Queensland Cowboys have gone back-to-back in the Men’s Elite Eight after defeating the Queensland Titans 6-3 win at the National Touch League in Coffs Harbour.The reigning champions led the match from start to finish on a beautiful night at C.ex Coffs International Stadium, showing their class from the early minutes of play.It was an unfortunate result for the Titans who had performed so well for the whole tournament, but even they will appreciate the class and talent of the Cowboys’ side.A two-touchdown performance from Cormac Hoch helped his side to a 3-1 lead at half-time and they used this momentum to skip away in the second half. Jack Hughes opened the scoring in the early minutes of the second half, giving the Cowboys a commanding 4-1 lead in the process.They went on with it in the 27th minute, scoring the easiest of touchdowns through Damon Moore to lead 5-1.A stalemate emerged for the next seven minutes, before Cowboy Lachlan Hoch grabbed his first of the night to make it 6-1 with a little over five minutes to play.The Titans scored a consolation touchdown in the 36th minute to add some respectability to the scoreboard, but Graeme Clancy’s efforts were not enough, with the scoreboard showing a 6-2 scoreline in the Cowboys’ favour.Clancy grabbed a third touchdown on the hooter but the celebrations had already started for the Cowboys who held on for a 6-3 win.It was a complete 40-minute performance from the Cowboys who opened the scoring very early in the match to grab the upper hand from the get-go.In fact it took just three minutes for the Cowboys to cross the line, with Braydon Hegarty crossing in the left corner.Cormac Hoch sliced through the Titans’ defence in the 10th minute to make it 2-0, putting his side in a great position in the process.But just minutes later, The Titans cut the deficit to one touchdown through the handy work of Clancy who crossed in the right corner.However, the Cowboys continued to pile on the pressure and it paid off in the 16th minute, with Cormac Hoch scoring a spectacular touchdown to put his side up 3-1. That’s the way it stayed at half-time, and the Cowboys used that momentum to go on with the match and claim the title.Queensland Cowboys 6 (C. Hoch 2, L Hoch, Hegarty, Hughes, Moore touchdowns) def. Queensland Titans 3 (Clancy 3 touchdowns)Related LinksMen’s E8 finallast_img read more

28 Oct

10 months agoMan Utd boss Mourinho loses rag in post-match interview

first_imgAbout the authorPaul VegasShare the loveHave your say Man Utd boss Mourinho loses rag in post-match interviewby Paul Vegas10 months agoSend to a friendShare the loveManchester United boss Jose Mourinho took aim at a reporter after their 3-1 defeat to Liverpool.In truth United were second best all over the pitch and the defeat kept them eight points behind Arsenal in fifth place. Mourinho’s side have now conceded 29 goals this season in the league, one more than they did across the whole of last season. Asked if he believed the players are playing for him, Mourinho snapped: “What is that? Are you calling the players dishonest? You are asking me if they are dishonest.”I believe they are honest and you believe they are dishonest. A footballer has to give the maximum every day, every match, every minute, it doesn’t matter the manager, it doesn’t matter anything.”The club that pays him, the fans that are 24 hours per day in love with our club. It’s about respect for the club and the fans. The players that don’t do the maximum you are calling them dishonest. I don’t call them dishonest at all.” last_img read more

28 Oct

10 months agoMan City striker Gabriel Jesus sets sights on displacing Aguero

first_imgMan City striker Gabriel Jesus sets sights on displacing Agueroby Freddie Taylor10 months agoSend to a friendShare the loveGabriel Jesus is desperate to replace Sergio Aguero as Manchester City’s first choice striker.The 21-year-old has struggled for form since his close-knit family returned to Brazil after their UK holiday visa expired 18 months ago.But after scoring four in Wednesday night’s 9-0 win over Burton Albion, Jesus feels he’s back in form.”I’ve already forgotten the problems of last year and I’m really happy now,” he said. “My family is going back to Brazil, unfortunately, but that’s an issue just at home, not on the pitch.”I’ve had amazing days beside them, I’m grateful for the family I have, they are always beside me and allowing me just to focus on football.”I’ll miss them, obviously, but I’m mentally stronger now and I just want to play well, score goals and help the team.”He added: “Sure (I can do it) like when I first came here,” he told Esporte Interativo. “I’ve always respected and will always respect Sergio and the manager’s decisions, but it’s up to me to pursue a place in the team.”I try to show on a daily basis, training hard trying to get into the first XI.”I know Sergio is having an amazing season, but I’m here able to help whenever they need me.”I haven’t played a lot on Premier League this season and I want to help.” About the authorFreddie TaylorShare the loveHave your saylast_img read more

13 Oct

How major US stock indexes fared Thursday

first_imgU.S. stocks climbed Thursday after the Wall Street Journal reported that U.S. officials could reduce the new tariffs on Chinese imports as part of trade negotiations between the two countries. It was the latest in a series of potentially conflicting updates on the trade dispute.On Thursday:The S&P 500 index rose 19.86 points, or 0.8 per cent, to 2,635.96.The Dow Jones Industrial Average gained 162.94 points, or 0.7 per cent, at 24,370.10.The Nasdaq composite added 49.77 points, or 0.7 per cent, to 7,084.46.The Russell 2000 index of smaller-company stocks climbed 12.55 points, or 0.9 per cent, to 1,467.25.For the week:The S&P 500 is up 39.70 points, or 1.5 per cent.The Dow is up 374.15 points, or 1.6 per cent.The Nasdaq is up 112.99 points, or 1.6 per cent.The Russell 2000 is up 19.86 points, or 1.4 per cent.For the year:The S&P 500 is up 129.11 points, or 5.2 per cent.The Dow is up 1,042.64 points, or 4.5 per cent.The Nasdaq is up 449.19 points, or 6.8 per cent.The Russell 2000 is up 118.69 points, or 8.8 per cent.The Associated Presslast_img read more

13 Oct

Peace Region palaeontologists lead researchers in cataloguing new Hominid trackway in South

first_imgThe researchers say that a number of creatures, probably Homo sapiens, made the tracks while moving down a dune surface. This is the first reported hominid tracksite in the world from this time period and adds to the sparse global record of early hominid tracks. The trackway site also represents the largest and best-preserved archive of Late Pleistocene hominid tracks found to date.The narrow confines of the cave, often with a space of 50 cm or less between floor and ceiling, made for significant challenges in the documentation. However, thousands of photographs of the track-bearing surface were taken. Dr. McCrea then used the photographs to develop 3D photogrammetric models of the trackway. Combined with a track map, the digital data will make it possible to create exact replicas of the track-bearing surface. A similar technique has been used in the Peace Region to document dinosaur trackways.The full article can be read at: www.nature.com/articles/s41598-018-22059-5 TUMBLER RIDGE, B.C. — Two Peace Region-based palaeontologists have made important scientific discoveries on dinosaurs in the past, but this time Drs. Charles Helm and Richard McCrea were researching creatures that lived much more recently.An international team of researchers led by Dr. Helm has published an article today in the open-access journal Scientific Reports which draws attention to a Late Pleistocene hominid trackway site that was identified two years ago on the south coast of South Africa. Up to forty hominid tracks were found on the ceiling and side walls of a ten-metre long cave. The tracks are thought to have been made approximately 90,000 years ago when the nearby shoreline would have been about 2 kilometres away. A 3D image of a portion of the northern trackway surface. Photo by Dr. Richard McCrea A 3D image of a portion of the northern trackway surface. Photo by Dr. Richard McCrea Tracks on the southern surface, with 10 cm bars for scale. Photo by Dr. Charles Helm Tracks on the southern surface, with 10 cm bars for scale. Photo by Dr. Charles Helm Dr. Charles Helm examining the northern track-bearing surface, which forms the ceiling of the confined inner part of the cave. Photo by Guy Thesen. Dr. Charles Helm examining the northern track-bearing surface, which forms the ceiling of the confined inner part of the cave. Photo by Guy Thesen. last_img read more