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A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools .
Reverse osmosis ( RO) is a water purification process that uses a semi-permeable membrane to separate water molecules from other substances. RO applies pressure to overcome osmotic pressure that favors even distributions. RO can remove dissolved or suspended chemical species as well as biological substances (principally bacteria ), and is used ...
Slow sand filter. Slow sand filters are used in water purification for treating raw water to produce a potable product. They are typically 1–2 m (3.3–6.6 ft) deep, can be rectangular or cylindrical in cross section and are used primarily to treat surface water. The length and breadth of the tanks are determined by the flow rate desired for ...
LG is also looking at an ecological re-imagining of the refrigerator, with a prototype that can keep itself cool for six hours without any power assistance. ... grappling hook and navigation ...
LG said it had big plans for its robots at CES, and it wasn't kidding around. The tech giant has unveiled a handful of robotic helpers that clearly go well beyond vacuums. To start, it's ...
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LG's ultra-simple, no-fuss HomeBrew could be the gateway for brew-it-yourself newcomers, though, and could well be the kit that takes the process mainstream. Latest Stories Engadget
A respirator cartridge or canister is a type of filter that removes gases, volatile organic compounds (VOCs), and other vapors from air through adsorption, absorption, or chemisorption. It is one of two basic types of filters used by air-purifying respirators. The other is a mechanical filter, which removes only particulates.