leach
Leach کی
definition
verb
the nutrient is quickly leached away
(with reference to a soluble chemical or mineral) drain away from soil, ash, or similar material by the action of percolating liquid, especially rainwater.
example
pesticides that 'leach' into rivers
The small chloride ion can also sometimes work its way past protective coatings and 'leach' out soluble iron chloride salts, exposing new surfaces for attack.
The pad is used to store a mound of ore through which chemicals percolate to 'leach' out the gold ore, which is then collected and processed into bullion.
The key, once you've cleared a patch of ground, is to get something sown or planted to fill the vacuum: otherwise the winter wet will 'leach' nutrients from the soil, and the weeds will undo your good work in a matter of weeks.
Millions of people in the Himalayas and Andes suffer from goitre and cretinism as glaciation, heavy rainfall and melting snow regularly 'leach' mountain soils of their iodine content.
pesticides and fertilizers that 'leach' into rivers
The other attraction of these materials, which were developed in the 1970s, is that they continuously 'leach' fluoride and so can help reduce the incidence of recurrent caries.
One drawback of organic-based products is the tendency of chemicals to 'leach' from the matrix material, leaving parts of the surface unprotected.
#6 Polystyrene can 'leach' styrene, a possible human carcinogen that may also interfere with hormones.
More recently they have speculated that acid rain robs trees of this vital nutrient by 'leaching' it from the soil and by mobilizing aluminum, which interferes with calcium uptake by roots.
Humus being highly colloidal, has the ability to adsorb and retain for future plant use many of the ions such as calcium, magnesium, potassium, phosphates and ammonia which might be 'leached' from the soil and lost in drainage.
In Australia, Mangareva, parts of the U.S. Southwest, and many other locations, most of the nutrients had already been 'leached' out of the soil by rainfall.
It will stop rain 'leaching' nutrients from the soil over the winter, and as it rots down it will improve the soil's texture and fertility quite naturally.
The sort of feed may have to change, because the wetter winters will probably result in nutrients being 'leached' out of the soil at a faster rate.
This, combined with nutrients being 'leached' out of the soils by high rainfall, may cause weakness in some plants and nutrient deficiency, particularly in sandy soils.
If rainfall or irrigation is excessive, nitrate will be 'leached' below the plant?
Precious metals, such as platinum and gold, which may be present on the PCB, can also be 'leached' and recovered electrochemically and reused.
Both field evidence and binocular microscope inspection of the sediment from East Avenue Range indicate that the sediment is highly 'leached' .
Polyurethane is a fully reacted polymer in which every molecule bonds with another so it is chemically inert, which keeps it from oxidizing or 'leaching' chemicals, theoretically extending tire life.
In the processes generally known as bioleaching, stress-hardy bacteria, which can get all their nutrient requirements from the air and the minerals to be 'leached' , are typically employed to oxidise ores to a more soluble state.
When they looked at the data from their 1995-2001 study and saw how much nitrate was being 'leached' from the soil, they realized just how important it is to manage drainage systems carefully.
He concluded that the pseudomorphs were derived when rainwater penetrating the near-surface layers 'leached' out the sodium carbonate from the original shortite, leaving behind calcium carbonate.
Soluble minerals are 'leached' from soils on upper slopes, move down the slope, and are often deposited at the foot of the slope.
Brackish and ocean waters may contain large quantities of sodium chloride as well as many other soluble compounds 'leached' from the crust of the earth.
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