Hazardous Waste Management

1. H A Z A R D O U S
W A S T E
M A N A G E M E N T
By Alok Mishra

2. INTRODUCTION:- CADMIUM
Flammable in powder form. Toxic by inhalation of dust
of fume.
It mainly affects kidneys and bones. It is also
a carcinogen by inhalation.
Cadmium can accumulate in liver, kidneys and bones,
which may serve as sources of exposure later in life.
In the environment, cadmium is toxic to plants,
animals and micro-organisms.
Being a simple chemical element, cadmium
is persistent – it cannot be broken down into less toxic
substances in the environment.
In its elemental form,
cadmium is a soft, silver-white
metal.
It is not usually present in the
environment as a pure metal,
but is most often found in
zinc, lead, and copper ores.

3. PROPERTY OF HAZARDOUS WASTE
Corrosivity
Explosivity
Flammability
Ignitability
Reactivity
Carcinogenicity
Infectivity
Irritant (Allergic)
Mutagenicity
Toxicity (Poison)
Radioactivity
Teratogenicity
Safety Related
Property
Health Related
Property
Property of Cadmium waste
Flammability
Reactivity
Carcinogenicity
Toxicity
(Poisons)

4. CADMIUM:- HAZARDOUS WASTE MANAGEMENT
GENERATION STORAGE
By-product of mining.
Smelting and refining of zinc , lead and copper.
Sludge is produced at active water treatment plants used at
some mine sites, where the sludge is rich in cadmium
or arsenic.
Sludg
e
Sludg
e

5. PROCESSING OF CADMIUM
Processes
Ion exchange,
Sulphide
Precipitation
Cementation,
Electro
Coagulation
Adsorption
Used as alternate processes aimed at
achieving low cadmium residuals in liquid
wastes.
Highly Cost-Effective and Reuse-Oriented
Treatment of Cadmium-Polluted Mining
Wastewater by Electrocoagulation Process
Cementation of cadmium by the zinc column
test was shown to be a feasible treatment
process to achieve a high degree of
cadmium removal within a fairly reasonable
contact time.
Removal of cadmium from simulated
wastewater (aqueous solution) using melon
husk (an agricultural residue) modified with
concentrated sulphuric acid was investigated

6. TREATMENT
DISPOSAL
Landfills
Surface
Impoundment
Waste Pile Injection Well
Salt Bed
Formation
Underground
Mines

7. RESOURCES
CONCLUSION
https://www.ncbi.nlm.nih.gov/books/NBK1588
41/
http://www.tandfonline.com/doi/abs/10.1081/
SS-120023414
https://dir.indiamart.com/impcat/waste-
disposal-containers.html
http://www.itrcweb.org/miningwaste-
guidance/to_chem_precip.htm