Monday, November 28, 2016

Diamonds convert nuclear waste into clean batteries

Source: https://www.engadget.com/2016/11/28/diamonds-convert-nuclear-waste-into-batteries/

Nuclear waste is normally a major environmental headache, but it could soon be a source of clean energy. Scientists have developed a method of turning that waste into batteries using diamond. If you encapsulate short-range radioactive material in a human-made diamond, you can generate a small electrical charge even as you completely block harmful radiation. While the team used a nickel isotope for its tests, it ultimately expects to do this using the carbon isotope you find in graphite blocks from nuclear power plants.

The batteries wouldn't generate much power, but their longevity would be dictated by the life of the radiation itself. Researchers estimate that a carbon-based battery would generate 50 percent of its power in 5,730 years. Most likely, the batteries would be used in high-altitude drones, pacemakers, spacecraft and anywhere else replacing the battery is either very cumbersome or impossible. You could see interstellar probes that keep running long after they lose solar power, for example.

Any practical implementations are likely a long way off, and there are some conspicuous problems. Cost, for one. Diamond is expensive, so it might not be feasible to convert large amounts of nuclear waste into batteries. That's assuming the technology works as well as intended, too. Still, it raises hope that the leftovers from nuclear reactors won't just sit there posing a threat -- they might actually do us some good.

Via: New Atlas

Source: University of Bristol

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Wednesday, November 16, 2016

Thousands of Dead Fish Mysteriously Appear in New York WaterwayƂ 

Source: http://gizmodo.com/an-insane-amount-of-dead-fish-just-showed-up-in-new-yor-1789055320

Earlier this week, an unforgettable sight greeted the residents of Hampton Bays, New York, as thousands upon thousands of dead bunker fish filled the Shinnecock Canal. Here’s what caused this gruesome fishpocalypse.

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Sunday, October 9, 2016

Six next-gen battery technologies

Source: https://www.engadget.com/2016/10/08/six-next-gen-battery-technologies/

By Cat DiStasio

We all love our battery-powered gadgets, but portable power cells can be devastating to the environment. Fortunately, recent developments have proven that greener batteries are coming in the not-too-distant future. Engineers are replacing toxic components with less harmful materials ranging from leaves to sugar. Other innovations on the rise look to nature to help make batteries last longer, perform better and leave less of a trace once they've been discarded. This gold nanowire-based battery, for instance, was created by accident and could make lithium ion batteries obsolete, while this single-use battery dissolves in water when its job is done, making it easier to reuse its components.

The leafy green battery

A team of University of Maryland researchers sought to develop an inexpensive material to serve as their batteries' negative terminal (anode). In the end, they found the perfect material right on campus. The team found that oak leaves could be heated to 1,000 degrees Celsius to destroy the existing carbon structures, and then introduced the electrolytes to the leaf's natural pores for absorption. The result is a plant-based anode that performs similarly to traditional battery components. Research is ongoing to test other natural materials, such as peat moss, banana peels and melon skins in search of the nature-based battery of the future.

A graphene battery that charges in an instant

Scientists are working hard to create rechargeable batteries that can withstand more use. Australia's Swinburne University has created a new graphene-based battery that shows rapid charging abilities -- and it has enough durability to last virtually forever. Super strong graphene replaces lithium in the battery's supercapacitor, addressing all of the shortcomings of that widely used material while also reducing the environmental impact of battery production. The graphene-based supercapacitor allows the new battery to charge to 100 percent power in just a few seconds, it can withstand many more recharging cycles and it also costs less to produce than traditional lithium-ion batteries.

Sweet and cheap: a battery fueled by sugar

A Virginia Tech team developed a sugar battery that lasts longer than any previous sugar-based prototypes could. Maltodextrin, a polysaccharide made from the partial hydrolysis of starch, is isolated from natural sugar and then used as fuel. When combined with air, the battery releases electrons from the sugar solution to generate electricity. Sugar is cheap and abundant, so it makes for a battery that's not only affordable, but biodegradable as well.

Gold-based battery that doesn't die

An accidental discovery by researchers at University of California, Irvine led to a technological breakthrough that could leave lithium-ion batteries in the dust. The team built a nanowire battery using gold and some new-fangled materials, and it can be recharged hundreds of thousands of times without slacking in the performance department like lithium-ion batteries are known to do over time. The battery consists of protected electrode nanowires made from a thin core of gold, surrounded by layers of manganese dioxide and a Plexiglas-like electrolyte gel. Although the team had initially been searching for innovations to increase the power capacity of batteries, they stumbled upon this method of building a battery that can last basically forever without showing any signs of wear.

Self-destructing battery dissolves in water

A self-destructing battery won't come in handy for everyone, but the development of this dissolving energy storage device is a key innovation for certain applications where single-use batteries are currently being left behind to pollute the surrounding environment. Created by a team at Iowa State University, this battery is designed to self-destruct when triggered by light, heat or liquid, so it's well suited for military applications and other so-called "transient" devices that require a power source for a finite amount of time. Certain medical devices and environmental sensors might fall into this category, and since the battery simply dissolves in water once it has served its purpose, its lasting impact on the environment is approximately nil.

Edible saltwater battery

Although there's probably no need to eat a battery, you could chow down on parts of this one if you really felt compelled. In an attempt to demonstrate how natural and eco-friendly his company's new battery really is, Jay Whitacre at Aquion Energy has eaten parts of the saltwater-based battery, and lived to tell. The battery's components are comprised largely of naturally derived materials such as dirt, cotton, carbon and saltwater acting as an electrolyte solution. While hardly a delicious meal, the battery components demonstrate an ecological sensitivity not often found in the energy storage field.

This battery is designed for large-scale jobs, such as providing backup power for a home or business equipped with a renewable energy source, such as wind or solar. It can also be charged up with off-peak grid power, to save money on energy use during peak times when prices are higher.

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Saturday, September 17, 2016

Six technologies that produce clean, safe drinking water

Source: https://www.engadget.com/2016/09/17/six-technologies-that-produce-clean-safe-drinking-water/

By Cat DiStasio

One in 10 people worldwide lack regular access to safe drinking water. In an effort to tackle this most basic humanitarian problem, engineers around the globe have developed a wide array of devices, large and small, that generate clean water. Each year, a slew of innovations aim to make the process easier, cheaper and more portable, as well as produce a yield high enough to make a real impact for some of the 663 million people who suffer from water shortages. Solutions range from using condensation methods to pull water from thin air, turning salty seawater into fresh water, or distributing UV light purification chips affordable enough for people to use at home. Only a few of these technologies are working outside the lab, but the ones that do have so far generated billions of gallons of clean water.

The Warka Water Tower

It took several years for the design of the Warka Water Tower to become a reality, but its first pilot program in a rural Ethiopian village was finally built earlier this year and began pulling clean water from thin air. The award-winning design is based on fog harvesting concepts, and it takes the form of an enormous cylinder constructed from bamboo and wrapped in recycled mesh. The tower is skirted by a canopy that provides shade for local residents to rest under while they funnel off condensed water from the tower's base. The Tower's makers plan to put it into mass production by 2019.

Tiny UV water purifier

Not all of the people lacking clean water live in drought-affected areas. Oftentimes, there is "water, water everywhere, but not a drop to drink" due to contamination from pollution or other environmental issues. Water purification systems are often expensive and time-consuming, but researchers at Stanford University and SLAC National Accelerator Laboratory recently developed a UV water purifier housed in a tiny black rectangle that cuts the lengthy process down from 48 hours to around 20 minutes. Although the device is a long way from mass production, lab tests on the prototype suggest that it could be the first step toward a new generation of water purification methods that help make dirty water drinkable.

The Pipe is floating solar-powered desalination plant

A new desalination project planned for California, dubbed The Pipe, made a splash this summer with its promise of providing 1.5 billion gallons of clean drinking water for the drought-stricken state. The solar-powered plant relies on electromagnetic desalination methods to turn seawater into clean water, filters the salty byproduct through thermal baths, and then flushes it back into the Pacific Ocean. The Pipe is also getting attention for its eye appeal, as it was designed to look more like a giant glittering sculpture than a piece of industrial equipment.

The World's largest fog harvester

The world's largest fog harvester uses giant mesh fences to trap dense fog in the Moroccan desert and turn it into clean, fresh water. With a surface area over 600 square meters, the contraption takes advantage of the fog blanketing the drought-stricken Aït Baâmrane region for six months out of the year. The fog harvester reportedly produces as much as 17 gallons of clean, safe drinking water per square yard of net. Solar-powered pumps, along with a system of pipes, deliver the clean water to 400 local residents, who ordinarily struggle to gain access to safe water in the arid region.

Nano Water Chip

The cost of clean water is a major obstacle for many thirsty people on Earth, so researchers look for affordable solutions for small scale, personal water purification. In 2014, a join research team from the University of Texas at Austin and the University of Marburg in Germany developed a low-drain "water chip" which generates a small electrical field to desalinate seawater. Early in its development, the water chip promised to offer a portable clean water solution capable of running on a regular battery. The startup Okeanos Technology was founded to further the product's research and development, which is still underway.

Carnegie Perth Wave Energy Project

The Carnegie Perth Wave Energy Project does double duty, generating renewable energy from the motion of the ocean while simultaneously desalinating seawater. The buoy-like floating device operates off the coast of Perth in Western Australia, where environmentally friendly electricity production methods are a priority. The submerged 240-kilowatt buoys work together in a trio, tethered to the seabed with hydraulic pumps that push water through power turbines as the system bobs with the waves. A built-in desalination system uses some of the electricity produced to create clean drinking water, and the rest of the electricity is fed back to shore and added to the grid. The utility-scale project is part of Perth's larger plan to lean on desalination as a long-term source of clean drinking water for the local community.

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Thursday, September 15, 2016

Scientists Baffled as Hundreds of Dead Horseshoe Crabs Wash Ashore in Japan

Source: http://gizmodo.com/scientists-baffled-as-hundreds-of-dead-horseshoe-crabs-1786662373

Horseshoe crabs are known as “living fossils” and for good reason. The blue-blooded, side-walking arthropods have been around for 200 million years, surviving the last five mass extinctions. But something appears to be wrong as hundreds of dead horseshoe crabs have recently washed ashore in southern Japan, leaving scientists confounded.

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Monday, May 16, 2016

Thousands of tiny red crabs have taken over Orange County beaches

Source: http://www.businessinsider.com/tiny-red-crabs-orange-county-beaches-2016-5

crabsThousands of tiny red crabs are carpeting beaches in Orange County and creating an amazing spectacle for swimmers and surfers.

Lifeguards estimate that hundreds of thousands of the tiny crustaceans washed up Friday on beaches in Newport Beach.

crabsAP

Others were spotted in Laguna Beach.

The Orange County Register reports that pelagic red crabs are usually found off Baja California, but currents that are part of the El Nino weather pattern are sweeping them north.

crabsAP

The 1- to 3-inch-long crabs have washed up for several years along the Orange County coastline.

Before that, they hadn't been seen in the area for decades.

Copyright 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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Thursday, January 14, 2016

Thousands of dead fish washed up on Rio de Janeiro's Olympic shore

Source: http://www.businessinsider.com/r-dead-fish-wash-up-on-shores-of-rio-bay-near-olympic-venue-2016-1

Rio Brazil Dead FishREUTERS/Ricardo Moraes

RIO DE JANEIRO (Reuters) - Thousands of dead fish washed up on the shores of Rio's Guanabara Bay on Wednesday, not far from where events are being held at this year's Olympic Games, environmental officials said.

The incident was the latest involving water quality in the bay, where sailing, open water swimming, and triathlon races are due to take place at the Games in August.

"Officials found rubbish in the water and on the beach as well as a considerable number of dead fish all from the same species of sardine," the government's State Environmental Institute said in a statement.

"These fish because of their low commercial value are often thrown overboard by trawlers as we have seen on other occasions in this same area."

Other than floating garbage the officials saw no "visual abnormalities" in the water. They took samples and will report back in five days.

When Rio bid to host the 2016 Olympics, the city said it would cut the amount of raw sewage flowing into the bay by 80 percent but has since confirmed it will not meet that target.

An independent report last year found there were dangerously high levels of viruses and bacteria in the water.

(Reporting by Andrew Downie, editing by Ed Osmond)

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