Overview
Lanthanum Chloride (LaCl3) is used to prevent algae growth in aquariums, water parks, and residential waters, as well as in aquatic habitats. Lanthanum is a rare earth metal that is extremely effective at preventing phosphate buildup in water. A small dose of Lanthanum Chloride added to phosphate-laden water forms small flocs of LaPO4 precipitate, which can then be filtered using a sand filter.
Advantages of using lanthanum chloride
· Phosphate is removed down to 10 ppb (0.01 mg/L).
· Algae growth is hampered due to a low phosphate level.
· The water system will not be discolored.
· Reduces the need for chlorine for algae control.
Lanthanum Chloride Uses
Lanthanum metal has no commercial applications. However, its alloys have a wide range of applications. To store hydrogen gas for use in hydrogen-powered vehicles, a lanthanum-nickel alloy is used. Lanthanum can also be found in the anode of nickel metal hydride batteries, which are used in hybrid vehicles.
Lanthanum is a critical component of mixed metal alloys (about 20%). This alloy is best known for its use in 'flints' for cigarette lighters.
Lanthanum-containing 'rare earth' compounds are widely used in carbon lighting applications such as studio lighting and cinema projection. They boost the brightness and produce an emission spectrum similar to that of sunlight.
Lanthanum (III) oxide is used in the production of special optical glasses because it improves the glass's optical properties and alkali resistance. Lanthanum salts are used in petroleum refining catalysts.The ion La3+ is used as a biological tracer for Ca2+ and radioactive lanthanum has been studied for its potential use in cancer treatment.
How to remove Algae removal using lanthanum chloride?
There are two phosphate abatement rare earth chloride solutions: lanthanum chloride and cerium/lanthanum chloride (CLC).
Because of their high affinity for phosphorus and wider effective pH range, both solutions are very effective at removing phosphates and algae from water. Each product reacts with phosphorus in a 1:1 molar ratio, requiring less solution to achieve the desired phosphate level and producing less sludge.
Many zoos that uses lanthanum chloride has seen great success with their sea lion exhibit. The solution removed enough phosphorus to reduce algal growth while also acting as a filter aid, resulting in clearer tank water. Lanthanum chloride is another common purchase used to control algal growth in swimming pools.
Toxicity
Even though rare earth elements can irritate the skin and eyes, they are generally poorly absorbed through the gastrointestinal tract, skin, and lungs. Both cerium and lanthanum have been studied and found to have low acute toxicity. The Environmental Protection Act(EPA) has not classified any rare earth elements as carcinogens.
The Environmental Protection Agency (EPA) has calculated Provisional Peer Reviewed Toxicity Values (PPRTV) for lanthanum and cerium compounds. PPRTV is a toxicity value determined through a review of relevant scientific literature using the same methods as the EPA's Integrated Risk Information System (IRIS) Program.
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