BharatNotes Leachate
nounUsage in a UPSC answer
India's urban governance crisis is starkly visible at unscientific dumpsites such as Delhi's Ghazipur, where untreated leachate seeps into the water table and contaminates groundwater, underscoring why the Solid Waste Management Rules, 2016 mandate engineered liners and leachate-collection systems at every sanitary landfill.
Synonyms
Antonyms
Word Family
leach (v), leached (adj), leaching (n/v pres.p), leacher (n)
Root
English leach (Middle English lechen = to wet, drain) + noun-forming suffix -ate; coined 1950s
Etymology
From English leach (Middle English lechen, "to wet, to drain") + the noun-forming suffix -ate; first recorded in the 1950s.
Memory Hook
"Leach-ate" — what the rain "leaches" out and the ground then "ate": the toxic liquid leached from waste and swallowed by the soil.
How This Word Works in UPSC Writing
The contaminated liquid that forms when rainwater percolates through accumulated waste, dissolving organic acids, ammoniacal nitrogen, heavy metals and pathogens on its way down. Its significance is that it is the pathway by which a solid waste problem silently becomes a water problem, and the damage is long-lived, since groundwater contamination persists for decades after a dumpsite stops receiving waste. Two responses follow at different levels. The engineering response is the sanitary landfill, with an impermeable liner, leachate collection and treatment and gas capture, which is precisely what separates a landfill from a dump. The governance response is source segregation, since keeping wet waste out of the landfill reduces leachate generation at its origin.
Don’t Confuse It With
Leachate is the contaminated liquid draining out of solid waste. Effluent is liquid waste discharged from a plant or process through a pipe. Runoff flows over the surface without percolating through anything. Landfill gas is the gaseous counterpart, largely methane and carbon dioxide. A sanitary landfill is engineered with liners and leachate collection, while a dumpsite has neither, which is the entire distinction between the two.
Hindi Meaning
निक्षालन द्रव (nikshālan drav); लीचेट is also used directly.
Common Questions
- What is leachate?
- The contaminated liquid that drains out of solid waste after rainwater percolates through it, carrying dissolved organic matter, heavy metals and pathogens.
- Why is leachate dangerous?
- Because it seeps into groundwater, and that contamination is invisible, difficult to reverse and persists long after the dumpsite itself has closed.
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