Effects of carcinogenic metals on the body
In the industrial environment, a number of metals and their compounds pose a serious oncological hazard to workers. Exposure occurs primarily during the extraction, purification, or use of these substances in technological processes.
- Nickel. Contact with this metal, especially during its production and subsequent purification, reliably causes lung cancer.
- Arsenic. This element and its compounds exhibit a wide range of negative effects. First, it has a direct toxic effect on various organs and the skin. Second, arsenic is a potent carcinogen, particularly hazardous to the skin. When inhaling industrial dust and aerosols containing arsenic, workers develop occupational lung cancer. The high-risk group includes employees of metallurgical, copper-smelting, and chemical plants engaged in arsenic production. Workers in the agro-industrial complex who come into contact with pesticides and herbicides (e.g., during the dusting of vineyards) are also at risk.
- Beryllium. Working with this substance is associated with the development of malignant neoplasms in the lungs, and also provokes the appearance of bone tissue tumors.
Organic carcinogens: PAHs and formaldehyde
In addition to heavy metals, organic compounds formed during various chemical reactions or combustion processes pose a significant threat.
Polycyclic aromatic hydrocarbons (PAHs) The main sources of PAHs are tar, pitch, coal tar, and other products formed during the incomplete combustion of coal. The main carcinogenic agent in this group is benzpyrene — a specific aromatic hydrocarbon that was first isolated precisely from coal tar. Prolonged contact with PAHs leads to the development of skin cancer, as well as malignant lesions of the upper respiratory tract and lung tissue.
Formaldehyde (formic aldehyde) This is a gaseous substance characterized by an extremely pungent and unpleasant odor. Formaldehyde exerts a complex pathological effect:
- Causes a narcotic effect.
- Severely irritates the mucous membranes of the eyes, respiratory tract, and skin upon direct contact.
- Is a proven carcinogen.
Of particular importance in industry is formalin — an aqueous solution of formaldehyde at a concentration of 25 to 40%. It is actively used in the manufacture of resins, plastics, and chemical fibers. In addition, formalin is in demand in the paper, fur, leather, and textile industries, and is also used as an effective insectofungicide.
Prevention measures for occupational cancer
To minimize the risk of developing oncological diseases in production personnel, a set of strict preventive measures is implemented.
First and foremost, the possibility of completely abandoning the use of carcinogenic substances is considered, if permitted by the production cycle. As an alternative, hazardous technological processes are replaced with safer analogs.
Key areas of protection for the industrial workforce:
- Mandatory medical support, including preliminary examinations upon hiring and regular periodic check-ups.
- Implementation of therapeutic and preventive nutrition. A characteristic example is the prescription of diet No. 4 to employees working with vinyl chloride. This diet is mandatorily enriched with a daily dose of ascorbic acid in the amount of 150 mg.
- Raising the general culture of production.
Technical and sanitary-hygienic measures include:
- Installation of highly efficient and rational ventilation systems.
- Maximum sealing of all technological processes accompanied by the release of carcinogens.
- Deep mechanization of manual labor to exclude direct contact with harmful agents.
- Strict use of personal protective equipment (PPE).
- Strict adherence to basic personal hygiene rules: mandatory showering at the end of the work shift, as well as separate storage of everyday (home) and specialized (work) clothing.
Briefly: answers to topical questions
What therapeutic and preventive diet is prescribed to workers upon contact with carbon disulfide?
Upon contact with carbon disulfide, preventive nutrition may utilize:
- Glutamic acid — promotes the removal of carbon disulfide from the body.
- Zinc and copper salts — exert a protective effect upon exposure to carbon disulfide, thiurams, and dithiocarbamates.
Creating a single diet that protects the body simultaneously against all xenobiotics is impossible.
What products and supplements are included in therapeutic and preventive diet No. 4, prescribed when working with vinyl chloride?
As a measure to prevent the development of oncological diseases in industry when working with vinyl chloride, therapeutic and preventive diet No. 4 is prescribed. This diet mandatorily includes a specific vitamin supplement:
- Ascorbic acid — used as a daily supplement at a dosage of 150 mg.
Information on other specific food products included in this preventive diet is absent in the presented materials.
To remember the pathologies caused by beryllium, use the phrase "White Bones and Lungs" — Beryllium affects Bones (tumors) and Lungs (cancer).
Class and exam questions
Which groups of workers are most susceptible to the carcinogenic effects of arsenic?
The risk group includes workers in copper-smelting, chemical, and metallurgical industries, as well as agricultural workers in contact with pesticides and herbicides.
What is formalin and where is it used?
Formalin is a 25–40% aqueous solution of formaldehyde. It is widely used in the production of plastics, chemical fibers, in the leather and textile industries, and as an insectofungicide.
What is the main carcinogen contained in coal tar?
The main carcinogen of products of incomplete coal combustion and coal tar is benzpyrene — a representative of polycyclic aromatic hydrocarbons.
What preventive nutrition is prescribed when working with vinyl chloride?
Workers are prescribed a special diet No. 4, to which 150 mg of ascorbic acid is added daily.
What else to study on this topic
- Pathogenesis of the carcinogenic effect of nickel on lung tissue
- Toxic effect of arsenic on the skin
- Features of the use of personal protective equipment upon contact with formaldehyde
- Organization of rational ventilation systems at chemical plants
- Medical contraindications for employment involving polycyclic aromatic hydrocarbons
Master the entire topic in the "Hygiene" course
This is a summary. The course covers everything tested in classes and exams.
- Full guidelines on the topic "Occupational carbon disulfide intoxication" and 530 more pages of the subject
- Assignments and quizzes after every topic — just like in a colloquium
- AI tutor answers questions on the topic anytime
- 95 video lessons for the subject
Other topics in "Chapter 6. Fundamentals of Occupational Hygiene and Physiology"
Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.