Today I’m going to talk about: Hazardous wastes
I’ve divided my presentation into two parts:
First I’d like to introduce the wastes and second I’ll present sources
of hazardous wastes.
So, let’s start with introduce
Hazardous Wastes, solid, liquid, or gas wastes that can cause death,
illness, or injury to people or destruction of the environment if
improperly treated, stored, transported, or discarded. Substances are
considered hazardous wastes if they are ignitable, corrosive, reactive, or
toxic. Mixtures, residues, or materials containing hazardous wastes are
also considered hazardous wastes.
Many dangerous substances can be used only with special precautions
that decrease their risks. When discarded, these substances are no longer
under the direct control of the user and may pose special hazards to people
or other organisms that come in contact with them. Because of such
potential risks, hazardous wastes are processed separately from ordinary
wastes.
There are foor sources of hazardous wastes: Industrial, Agricultural,
Household and Medical.
A Industrial Wastes
Hazardous wastes are generated by nearly every industry; those
industries that themselves generate few hazardous wastes nonetheless use
products from hazardous waste generating industries. Other hazardous wastes
are generated in the manufacture of fiber optics and copper wire used in
electronic transmission, as well as magnetic disks, paper for technical
manuals, photographs for packaging and publicity, and trucks for
transportation of the finished product.
B Agricultural Wastes