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Monday, December 15, 2014

What are hazardous substances?

Many different types of hazardous substances;

How to deal with the hazardous substances?

Many naturally occurring substances are harmless and do not cause dangerous in human health, but in the other hand there are so many harmful industrial substances to human health and to the environment safe.

Avoiding the dangerous substances:

We may not be able to avoid dealing with these substances because of the implication in the industry processes but great cautions and attentions must be taken by the managers of exploitation of such matters and the laws have to be vigorous and under the control of the authorities in place. 

Different types of hazardous materials:

1.    It is not possible to cite all these materials but we ought to know that electrical and electronic equipments contain different hazardous materials which are harmful to human health and the environment, if not disposed properly and carefully;
2.    Whereas some natural substances in spite of their safe and harmless but when used in the manufacture of electronic equipments turn to compounds that are hazardous;
3.    Bellow are the most found substances in wastes;


1.    Arsenic is a poisonous metallic element which is present in dust and substances;
2.    Chronic exposure to this matter can cause various diseases of skin and decrease nerve conductivity;
3.    And also may provoke lung cancer.


1.    Barium is a metallic element that is used in spark-plugs, fluorescent lamps;
2.    It is highly unstable in the pure form;
3.    It reacts with oxygen in the air to form poisonous;
4.    Exposing to barium even in little time may lead to brain swelling, muscle weakness, heart, liver and spleen, damage.


1.    Exposure to beryllium can cause lung cancer;
2.    The contact occurs by inhalation of beryllium dust, fume or mist;
3.    Workers who constantly are exposed to beryllium, whatever the amounts, may develop what is know as chronic beryllium disease, which affects the lungs;
4.    Besides to skin disease characterizing in poor wound healing.

Brominated Flame Retardants:

1.    This substance is used in electronic and electrical appliances;
2.    Flame retardants render materials more flame resistant;
3.    This substance has been found in indoor dust and air through migration and evaporation from plastics;
4.    Combustion of some kind of materials like halogenated case and printed wiring boards at low temperature releases toxic emissions including dioxins which can cause sever hormonal disorders.


1.    Cadmium components can have serious impacts on the kidneys;
2.    Cadmium is absorbed by respiration and also may be taken with food;
3.    Cadmium can be accumulated in amounts that cause symptoms of poisoning because of its long half life in body;
4.    It has dangerous effects in the environment due to its chronic toxicity;
5.    The exposure of cadmium may lead to weakness, fever, headache, and even to lung cancer and kidney damage.


1.    These compounds are composed of carbon, fluorine, chlorine and some times hydrogen, used in cooling units and insulation foam;
2.    These compounds have deleterious effects on the ozone layer when they are released into the atmosphere and accumulated in the stratosphere;
3.    They result in increasing of skin cancer in human and in genetic damage in many organisms.


1.    Chromium and its oxides are used because of their high conductivity and anti corrosive properties;
2.    There is some kinds of chromium are not toxic, the danger is that chromium is easily absorbed by human body and then produces various toxic effects within the cells;
3.    Chromium compounds can cause skin and mucous membranes irritation, permanent eye injury and also DNA damage.


1.    Dioxins and furans are a family of chemicals comprising many different types of dioxin compounds;
2.    Dioxins are not intentional products but are unwanted by products in the manufacture of substances, like some kind of pesticides as well as during combustion;
3.    Dioxins are highly toxic to humans and animals.


1.    Lead is widely used metal, but exposure to high levels of lead can cause vomiting, diarrhea, convulsions, coma or even death;
2.    Continuing exposure to lead can affect the kidney, it is dangerous for young children because it can damage nervous connections and cause blood and brain disorders.


1.    Mercury is one the most toxic and widely used metals in the production of electrical and electronic applications;
2.    This toxic heavy metal can cause brain and liver damage if ingested or inhaled.

Polychlorinated biphenyls:

1.    Polychlorinated biphenyls are a class of organic compounds used in a variety of applications;
2.    These compounds have been shown to cause cancer in animals and a number of serious non cancer health effects in animals;
3.    Including effects on the immune system, reproductive system, nervous system and other health effects;
4.    These materials are persistent contaminants in the environment.

Polyvinyl chloride:

1.    Polyvinyl chloride is the most widely used plastic;
2.    Its uses are expanding to every where, in electronics appliances, household items, pipes etc;
3.    PVC hazardous come from their contains up 56 percent chlorine which when burned produces large quantity of hydrogen chloride gas;
4.    This gas combines with water to form hydrochloric acid, dangerous when inhaled, leads to respiratory problems.


The exposure to high selenium compounds may lead to hair loss, nail brittleness and neurological abnormalities.
The Main Aim◄►Health For All ☼ Clean Environment!

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