METAL
LEAD

Chronic exposure
Lead targets are:
a) S.N.C. and Peripheral

b) Bone marrow

c) Gonads

d) Kidney

Topic principal

Toxicity
Acute poisoning does not exist in industry.

Effects detection
toxic ANNUALLY

HEMOGRAM

BLOOD, UREA

PLASMA, CREATININ

Exam

Biannually

Lead value Normal value: <30 mcg / 100
ml of blood. Currently the ACGIH has

Biological Exposure Index set

in 30 mcg / 100 ml of blood.

Free protoporphyrins Normal value: <75
mcg / 100 ml red blood cells. Index
Biological Exposure: up to 300

mcg / 100 ml red blood cells.

Delta-amino-levulinic acid Value
normal: <4.5 mg / g creatinine.
Biological Exposure Index: 10

creat mg / g

Characteristics:
It is a bluish-gray, malleable and ductile metal,
Whose melting point is at 327 ºC.

Resistant to sulfuric acid, dissolves

quickly in nitric acid and is solubilized

by organic acids.

Its main oxides are:

Minium (Pb3O4)

Lead dioxide (PbO2)

Litargirio (PbO)

Uses and exposure:

Lead and zinc mines.

Pb and Zn metallurgy.

Manufacture of accumulators

C.M.P.: 0,15 mg/m3
TLV-TWA: 0,05 mg/m3
(ACGIH)

Sequence of signs and symptoms associated with lead toxicity:
Mild toxicity from lead exposure can cause:
• slight fatigue

• irritability

• lethargy

• occasional abdominal discomfort

r

HOLA

Control

a) Evaluation of the work environment and correction of deficiencies that condition the
exposure to the contaminant.

b) Worker education on hygiene and personal protection standards

c) Quarterly control until normalization of the values.

GROUP 1

Members:


Jimmy Leon

Jhon Romero

Andres Coral

Anthony Cardenas