What pollutants come from landfills?
Landfills emit landfill gas that consists mostly of methane and carbon dioxide, with small amounts of volatile organic compounds from the bacterial decomposition of organic materials. Methane and carbon dioxide are both greenhouse gases, and methane is toxic and explosive in large concentrations.
What chemicals are in landfill leachate?
Generally leachate has a high biochemical oxygen demand (BOD) and high concentrations of organic carbon, nitrogen, chloride, iron, manganese, and phenols. Many other chemicals may be present, including pesticides, solvents, and heavy metals. The direction of groundwater flow.
What are the harmful effects of leachate?
Let us look at some of the health effects from acute exposure to certain chemicals and heavy metals found in leachates: Lead = Abdominal pain, diarrhoea, vomiting, confusion, drowsiness, seizures. Mercury = bloody diarrhoea, dehydration, renal failure.
What can leachate contaminate?
The leachate from Municipal Solid waste landfills is a highly concentrated “chemical soup”, so concentrated that small amounts of leachate can pollute large amounts of groundwater, leaving it unsuitable for domestic water use.
How leachate and gas are generated in a landfill?
Landfill leachate is produced when rainwater and seepage water percolate through the top cover, make contact with the buried unprocessed solid waste and extract soluble components.
What are the pollutants called?
Under the Clean Air Act, the National Ambient Air Quality Standards (NAAQS) are developed by the Environmental Protection Agency (EPA) for six common air pollutants, also called “criteria pollutants”: particulates; smog and ground-level ozone; carbon monoxide; sulfur oxides; nitrogen oxides; and lead.
Is leachate a pollutant?
7.1. 2 Landfill Leachate Effluents. Landfill leachate is characterized by high organic and inorganic pollutant concentrations (Bodzek et al., 2006) and is extremely toxic to the environment. … Due to its high toxicity, landfill leachate is a major threat for aquifer and surface water health status (Bulc, 2006).
What do landfills do with leachate?
Leachate is liquid generated from rainfall and the natural decomposition of waste that is filtered through the landfill to a leachate collection system. The leachate collection system’s job is to direct the leachate to collection sumps so it can be properly removed from the landfill.
How is leachate formed in landfills?
Leachate? “The liquid formed when rain water filters through wastes placed in a landfill. When this liquid comes in contact with buried wastes, it leaches, or draws out, chemicals or constituents from those wastes”.
What is leachate pollution?
Leachate is defined as any contaminated liquid that is generated from water percolating through a solid waste disposal site, accumulating contaminants, and moving into subsurface areas. … The composition and concentrations of leachate may also shift with the age of deposited materials.
Is landfill leachate harmful to humans?
The leachate contains all sorts of harmful chemicals, many of which are known to cause cancer or other serious harm to human health. Some of the most alarming chemicals frequently found in leachate – and showing up in sampling of Coventry landfill’s toxic soup – are called per- and polyfluoroalkyl substances (PFAS).
What is the effect of leachate in the environment?
Leachate that escapes from a landfill can contaminate groundwater, surface waters and soil, potentially polluting the environment and harming human health.