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Hazardous industrial factors and their influence on human health. Classification of hazardous environmental factors Physical Chemical Biological. In developing health standards with such concepts are operated as the maximum permissible concentration (MPC),

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Hazardous industrial factors and their influence on human health

Hazardous industrial factors

and their influence on human health


Hazardous industrial factors and their influence on human health

Classification of hazardous environmentalfactors

  • Physical

    • Chemical

      • Biological


Hazardous industrial factors and their influence on human health

In developing health standards with such concepts are operated as

  • the maximum permissible concentration (MPC),

  • the maximum allowable levels (MAL).

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Hazardous industrial factors and their influence on human health

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The maximum permissible concentration (MPC) - the maximum amount of a toxic substance in a unit volume or mass of water, air or soil, which has almost no effect on human health.

The maximum allowable levels (MAL) - repeated throughout life or constant influence of environmental factors (noise, vibration, pollution, low temperature, etc.) that do not cause physical or mental illness, and changes in health status.


Physical factors of the work environment

Physicalfactors of the work environment

- weather condition,

- high and low temperatures,

- the change in atmospheric pressure,

- electromagnetic,

- Ionizing radiation,

- vibration, noise,

are the cause of vibration disease, cochlear neuritis,radiation pathology, decompression of disease.

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Hazardous industrial factors and their influence on human health

Meteorological factors

are the cause of diseases associated with changes in atmospheric pressure.

When working on the raising the height of a low-pressure conditions (climbers in the mountains, pilots in high altitude flights, astronauts)

mountain sicknesscan develop.

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Hazardous industrial factors and their influence on human health

When working in depth under impact of high atmospheric pressure, for example, people who deal with diving and caisson work and working in compression pressure chambers, caisson disease (aeroembolism) develops.

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Hazardous industrial factors and their influence on human health

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Weather conditions

Weatherconditions are characterized by such physical factors of an atmosphere:

- in temperature (t),

- relative humidity (w),

- in the speed of movement of air (v),

  • thermal radiation.

    These factors effect weather or a microclimate on workplaces and in industrial areas.


Hazardous industrial factors and their influence on human health

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For keeping of a constant body temperature an organism should be in stabile temperature condition.

Correct thermoregulation in an organism it can be carried out only at the certain condition of an environment, i.e. at the certain combinations of temperature, humidity and speed of movement of air.

At the person taking place in rest and staying in conditions of meteorological comfort are:

temperature 18-20 °С;

relative humidity of 40-60 %;

speed of movement of air of 0,2-0,3 km/s.


Hazardous industrial factors and their influence on human health

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Heat in human consumption:

heating of air inhaled and received food and water -

5-10%;

the rest of the heat (90-95%) is dissipated into the environment through the skin:

• radiation (heat objects having a lower temperature ~ 45%);

• convection for heating clothes and close to the body of the air layers of ~ 30%;

• evaporation of moisture from the skin and lungs of about 25%.


Hazardous industrial factors and their influence on human health

With prolonged exposure of the body to high temperature of the atmosphere, especially in the absence of air movement and high humidity, temperature regulation is disturbed, the body is overheated and dehydrated, which leads to disruption of physiological processes, causing serious health problems:

exhaustion, convulsions, collapse and heat stroke.

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Hazardous industrial factors and their influence on human health

Microclimate cooling is a combination of parameters, in which the total heat transfer to the environment exceeds the body's heat production.

This leads to a general and/or local shortage of heat in the body.

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Hazardous industrial factors and their influence on human health

Symptoms of hypothermia stages with the growth of the danger of hypothermia:

• deviation from normal behavior, aggression,

and later apathy;

• weariness;

• the loss of a sense of danger;

• clumsiness of movement, speech;

• loss of consciousness;

• death.

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E lectromagnetic radiation

Electromagnetic radiation


Hazardous industrial factors and their influence on human health

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Hazardous industrial factors and their influence on human health

Electromagnetic spectrum

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Hazardous industrial factors and their influence on human health

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Hazardous industrial factors and their influence on human health

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Hazardous industrial factors and their influence on human health

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Vibration

Vibration

Mechanical vibrational motion, repeated at certain intervals.


Hazardous industrial factors and their influence on human health

The oscillation frequency is measured in hertz (Hz),

velocity - in meters per second (m/s),

acceleration (m/s2).

Remote control to adjust the level of vibration

- 112 dB (115-109) and 76 dB (73-109).

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Hazardous industrial factors and their influence on human health

Vibration with a frequency of 8 Hz and 16 Hz refers to the low-frequency,

31,5 and 63 Hz - the mid-range,

from 125, 250, 500, 1000 Hz - the drivers.

The greatest risk of developing the disease in the frequency of vibration of 16-250 Hz.

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Vibration disease

Vibration disease

Vibration disease is an occupational disease caused by an effect of high levels of vibration on the workers' body, characterized polymorphic clinical symptoms.

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Hazardous industrial factors and their influence on human health

Vibration disease is the third leading occupational diseases (7-25%).

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Types of vibration

Types of vibration

Depending on the type of contact with the working body vibration can be distinguished between local and general vibration.

Local vibration occurs by transfer through the upper extremity.  

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Types of vibration1

Types of vibration

General vibration is transmitted through the bearing surfaces of the body of a seated or standing person (bench, floor, processed product, platform, etc.).

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Hazardous industrial factors and their influence on human health

Gloves, helmets, earplugs, special suits and kneecaps are used for protection from local vibration.

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Hazardous industrial factors and their influence on human health

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A basic way of protection from general vibration is vibroisolation of the vibration source.

Vibroactivity units are installed on vibration isolators (spring, elastic strips, pneumatic devices, etc.) to protect from the effects of vibration.

.


Chemical factors of the work environment

Chemical factors of the work environment

Effect of chemicals causes acute and chronic intoxication.


Hazardous industrial factors and their influence on human health

The most common toxicity of benzene and its homologues

.

and

compounds of hard metals:

lead, mercury, arsenic.

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Hazardous industrial factors and their influence on human health

Benzene (C6H6, PhH)is an organic chemical compound, a colorless liquid with a pleasant sweet smell.

MPC – 5мг/м3

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Hazardous industrial factors and their influence on human health

Benzene and its derivatives are widely used in various industries.

Used as a solvent for vanishes and paints for different compounds and synthetic products insecticides, drugs and explosives (trinitrotoluol).

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Pathways and excretion of benzene from the body

Pathways and excretion of benzene from the body

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Respiratory path

and through intact skin


Pesticide poisoning

Pesticide poisoning


Hazardous industrial factors and their influence on human health

To control pests and diseases of agricultural crops, a variety of chemical pesticides - pesticides.

Direct contact that occurs during transportation, storage, seed treatment and sowing, spraying plants, etc.

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Hazardous industrial factors and their influence on human health

Depending of the chemical composition there are:

Organochlorine - DDT;

Organophosphorus - karbofos, malation;

Organomercury - fungioks, agronad;

Arsenic - rat poison.

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Etiology

Etiology

This group of compounds is expressed by cumulative properties.

They enter the body through the respiratory system, gastrointestinal tract, and intact skin.

They excrete from an organism through kidneys, gastrointestinal tract, sweat and mammary glands.

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Hazardous industrial factors and their influence on human health

Industrial dust (aerosols)

One deals with excessive dustiness in such cases:

In the foundry which is characterized by the presence of dust containing silica in combination with toxic gases;

In machining production there are effects of mixed dust, for example during welding.

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Hazardous industrial factors and their influence on human health

Industrial dust (aerosols)

In productionof building materials –

cement and asbestos factories, production of silica brick

In textile, flour, sugar production and agriculture (exposure to organic dust vegetable, mineral dust).

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Diseases caused by exposure to industrial dust

Diseases caused by exposure to industrial dust

Chronic disease caused by prolonged inhalation and deposition of dust in the lungs with development of diffuse fibrosis.

Pneumoconioses:

  • Silicosis;

  • Sylikatozy;

  • Berylliosis.

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Hazardous industrial factors and their influence on human health

Maximum permissible concentration (MPC) of industrial dust containing is 1 – 4 mg/m3

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Hazardous industrial factors and their influence on human health

Working with antibiotics, fungi-producers, protein-vitamin concentrate, enzyme preparations can cause dysbiosis, skin candidiasis, mucous membranes, visceral candidiasis and respiratory diseases.

Biological factors

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Hazardous industrial factors and their influence on human health

Infectious and parasitic diseases which occur during work process are called professional diseases, for example brucellosis, tuberculosis, infectious hepatitis.

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Hazardous industrial factors and their influence on human health

Bisynosis is an occupational lung disease of individuals who are exposed to the dust of organic fibrous materials (cotton, flax, hemp) for a long time, permissible concentration of the dust of vegetable and animal origin.

Maximum permissible concentration (MPC) of natural dust containing is 2 – 6 mg/m3

.

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Hazardous industrial factors and their influence on human health

The basis of clinical symptom of bisinosis are bronchial obstruction - due to sensibilization: histamine and others (fungi and bacteria).

Patients complain of difficulty breathing, shortness of breath, dry cough, weakness.

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Hazardous industrial factors and their influence on human health

  • Test work #3

  • What are the basic hazardous environmentalfactors?

  • a) physical, chemical, biological b) physical, chemical, biological, psychological

  • c) physical and chemical d) anthropogenic, natural, social

  • 2. Maximum amount of a toxic substance which has no effect on human health is defined as:

  • deadline b) latent effect

  • the maximum permissible concentration and the maximum allowable levels

  • d) the maximum permissible concentration

  • 3. What means are used for protection from local vibration?

  • a) vibroprotection respirators b) medical gowns

  • c) vibroprotection gloves, kneecaps d) lead aprons

  • 4.The ionizing radiation sources are:

  • X-rays b) radioactive materials c) cosmic rays d) all answers right

  • 5. What are physical hazards you know?

  • (Make as more examples as you can)

  • 6. What are thepathways of benzene to the body?

  • 7. What are thetypes of vibration?


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