Indoor air quality: a study on voc emissions from offset printing shops in Kota Bharu, Kelantan

Hamzah, Nur Fisya (2015) Indoor air quality: a study on voc emissions from offset printing shops in Kota Bharu, Kelantan. Project Report. Universiti Sains Malaysia. (Submitted)

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Printing industry emits large quantities of volatile organic compounds (VOCs) that impact to the air quality of the workplace and ambient of air quality. The sources of VOCs are numerous and widespread through the printing process. Two selected offset printing shops were involved for monitoring of VOC concentration including their activities. Emission rates of VOC concentration were measured by using Multi Photoionization detector (PID) for four weeks. The VOC concentration against time of sampling (morning, afternoon and evening) was analyzed by using Kruskal Wallis test. The VOC emission, ranged from 0.615 ppm to 8.259 ppm at Shop A, while, the average reading for Shop B were recorded from 0.070 ppm to 2.852 ppm. Average VOC concentration at both shops shows the VOC concentration reading was the highest in the morning. This phenomenon also occurred because of various sources of VOC presence, not only came from the photocopier operation. It also because of the effect from overnight accumulation of the VOC concentrations. Kruskal Wallis test shows that the p-values for both shops are less than 0.05 which are 0.034 (Shop A) and 0.001 (Shop B). This indicates that the result were significant and null hypothesis were rejected. Besides, printing process, blanket or ink roller cleaning (cleaning solvents) and putting inks were found as a potential sources of air pollutants at printing shops. It was concluded that offset printing contribute to high concentration of VOCs especially to the indoor air at printing shops.

Item Type: Monograph (Project Report)
Subjects: R Medicine > R Medicine (General) > R5-920 Medicine (General)
R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
Divisions: Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Kesihatan (School of Health Sciences) > Monograph
Depositing User: Mr Husnan Budin
Date Deposited: 14 Apr 2024 02:59
Last Modified: 14 Apr 2024 02:59

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