Waste

The production of traditional Portland cement is a major source of greenhouse gas emissions, as the ingredients have to be heated to very high temperatures. Such is not the case with a new biocement, however, which also incorporates waste materials.

As important as face masks are in our current pandemic-riddled world, they have a major environmental impact. Now scientists have demonstrated a novel method for disposing of old masks by using them to make low-cost, flexible and efficient batteries.

Composed of calcium sulfate dihydrate, gypsum is a naturally occurring mineral used in building materials. Scientists have now devised a method of creating synthetic gypsum, which should be more energy efficient than processing the genuine article.

Along with their batteries, many electric cars now utilize supercapacitors for tasks such as quickly delivering power while accelerating. Thanks to new research, a key component of such devices could soon be made from waste tamarind shells.

Although the use of pesticides is harmful to the environment, farmers still need a way of keeping crop-damaging organisms at bay. According to a new study, a combination of agricultural and beer brewing waste products may be able to help.

The brewing of beer produces great quantities of leftover grain, which often ends up being processed into cattle feed. Scientists have developed a new method of extracting the protein and fiber from that waste, however, for use by humans.

Like most other commonly used types of plastic, polyurethane is typically made from non-renewable crude oil, and it takes centuries to break down when discarded. Now, however, scientists have created a biodegradable polyurethane-like polymer using fish waste.

Those purple corn chips you see in the store aren't just a gimmick – the corn's purple pigment actually has health benefits. Researchers have now devised a method of extracting more of it from the usually discarded cob, for a variety of uses.

Everyone already knows that compost made from food scraps helps plants to grow. Now, however, scientists have fermented food waste to create a liquid fertilizer that boosts the number of beneficial bacteria within the plants themselves, and in their soil.

Although cleaning up the humungous Great Pacific Garbage Patch is a daunting concept, removing trash from local waterways is much more feasible … and that's exactly what the Clearbot robot is designed to do.

Scientists at Australia’s RMIT have developed a tiny sponge with big potential, and say the micron-sized material can be used to convert discarded cooking oil into biodiesel in a very cost-effective manner. And this catalyst is no one-trick pony.

Two of the problems with traditional plastics are the facts that they're made from non-renewable petroleum, and they stick around for centuries once discarded. A new alternative, however, is made from existing waste, and should biodegrade in a year.