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Remediation of heavy metal contaminated soils (Ocupations (Management and…
Remediation of heavy metal contaminated soils
Types
Ex-Situ
In-Situ
Concept
Removal of pollution
or contaminants
Soil
Types of soil
Topsoil
Subsoil
Sediment
Industrial activity
Use of certain fertilizers and pesticides
Chemical spills
Ocupations
Management and business specialist
Public relations specialist
Natural sciences managers
Emergency management director
Cost estimators
Construction managers
Compliance officers
Cience
Engineering and mappin
Implement the best methods for remediating polluted areas for reduce the risk of illness and injury for a company's employees
Cartographers and photogrammetrists
Chemical engineer
Environmental engineers
Health and safety engineers
Mining and geological engineers
Environmental engineering technicians
Construction and material-moving
Operate the machinery that is used
onsite in a remediation project
Construction laborers
Dredge operators
Earth drillers
Excavating and loading machine
Hazardous materials removal workers
Operating engineers and other constructions equipment operators
Technologies and
methods
Depend on the type, the extent
of the pollution and the place.
Excavation and dredging
Removing contaminated soil or
other material from a site
Hauling the soil away and replacing
it with uncontaminated soil
Aeration
Circulation of air through a substance
Bioremediation
Use of microorganisms to remove
pollutants from the soil or water
May be fungi, bacteria or certain plant species
Less costs
Takes more time to fully decontaminate a site
Dredging
Is the removal of underwater sediments
Pump and treat
Involves
Pumping contaminated groundwater out of the ground and
purifying it before returning it to the ground
Through
Air
stripping
Biological agents
Various types of
filters
carbon
Solidification
Adding materials to a site that bind to certain contaminant
Prevents the contamination fom spreading to a wider area offrom potencially contaminating groundwater.
Doesn't remove the contaminants
from the environment,
Stabilization
Uses materials that react chemically with contaminants
Is often used on sites that are contaminated with
heavy metals such as arsenic and mercury
Make it either less hazardous, easier to contain or remove by binding with contaminants and preventing their spread
Alter the makeup of
the contaminant
Oxidation
Use strong oxidants, which increase oxygen content of the soil or ground water
Chemical oxidant such as hydrogen
peroxide is pumped into the ground
Enhancing the growth and other microbes, which help to break down certain types of chemical pollution.
Soil vapor extraxtion
Purifies the soil and groundwater
at the same time
Air or steam is injected into the ground by a system of blowers and injection wells.
The vapors are then extracted
and treated as necessary.
Is used to treat a variety of contaminants, especially petroleum products.
Site assesesment and mapping
To
determinate
Potential costs and needed resources
Overall size
Environmental impact
Pollution impact on the local comunity
Any potential hazards to the workers
Technologies to implement
Types of contaminants and its location