[Analysis of some chemical contents in rain water collected from various materials]
1988
Phaisan Priksang (Department of Health, Bangkok (Thailand). Sanitation Division) | Phichit Sakunphram | Komon Siwabowon
The purpose of this study was to investigate and examine some chemical contents in rainwater affected from different type of roof, drain and storage container. The 707 rainwater samples were collected from 16 provinces in the middle, eastern and western parts of Thailand during the period of rainy season and 3 months after rainy season. Generally, the examined chemical contents which are calcium, iron, zinc, lead and nitrate are within the drinking-water quality criteria that is harmless to the consumer. Most of the chemical contents such as calcium, iron, zinc and lead decreased when it was stored except nitrate was found slighly increasing. However, it is indicative that storage produces improvement in some water quality parameters. The type of roof and container has found to have little effect on chemical content in rainwater. Moreover, that added some nitrate while galvanized iron and asbestos cement roof was found to increase zinc and calcium. Rainwater collected in reinforced concrete tank was found to increase calcium content. Galvanized iron tank was found to increase zinc while rainwater in mortar jar contains slighly increased nitrate. Form this project, however, it can be concluded that rainwater is clean and harmless enough for drinking.
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