Classification
Field Studies
Title
Author
Valentino RIMATORI, et al
In order to investigate the pollution degree in three weaving and dyeing and in two clothing
factories, the authors measured the indigo, oil mist, hydrogen sulfide (H2S), sulfur
dioxide (SO2) and total particulate matter (TP), as well as the biphenyl, o-phenylphenol
and p-phenylendiamine (PPDA) concentrations. H2S ranged from <0.01 to 1.85mg/ m3;
indigo from, <0.001 to 0.042mg/m3; TP from 0.58 to 3.65mg/m3: biphenyl and
o-phenylphenol from 0.2 to 15.5mg/m3. SO2 and PPDA concentrations were lower than
0.2 ppm and 5
g/m3 respectively. Higher concentrations were recorded during specific
operations. The oil mist concentrations in different factories at different heights in the air,
ranged from 0.2 to 15.5mg/m3. Up to date, neither the TLV nor the maximum allowable
concentration for indigo and o-phenylphenol have been established, nor there are no
studies on the health effects of long-term exposure, so the risk for the concentrations listed
above cannot be assessed. The PPDA concentration in our study was much lower than the
ACGIH TLV for 1993-1994. Biphenyl concentration sometimes exceeded the TLV,
suggesting the need for closer controls in the workplace. Oil mist concentration in weaving
rooms fell within the TLV, except in the weaving rooms where air forcing and air
extraction systems-were at a higher level: here the concentration of oil mist exceeded this
limit.
Abstract