Abstract
The purpose of this study is to investigate the composition of roof runoff pollutants and
to determine the relationships between pollutants and seasons (wet and dry) from two
commonly used roof types in Jengka, Pahang. Rainwater was collected from galvanized
and ceramic roof runoff. The sampling regime was done in two different seasons;
between November 2014- February 2015 (wet) and March-May 2015 (dry). A total of
60 rainwater samples were analysed for temperature, pH, EC, DO and selected heavy
metals (Fe and Zn). Zn and Fe are higher in galvanized roof (Zn: 0.05 ± 0.11 mg/L, Fe:
0.06 ± 0.13 mg/L) compare to those in ceramic roof (Zn: 0.001 ± 0.00 mg/L, Fe: 0.01
± 0.02 mg/L). There were no significant differences of metal elements found between
wet and dry seasons (p>0.05). The concentrations of metal elements in the harvested
rainwater are lower than the permitted heavy metal concentration limitation if to be
used as drinking water. All water quality parameters from galvanized and ceramic roofs
runoff in this study matched the drinking water guidelines proposed by the Ministry of
Health, Malaysia and safe to be used for the domestic purposes.
Siti Nadzifah Ghazali, Fazrul Razman Sulaiman. (2018) Water quality of roof runoff in sub-urban Malaysia, Asian Journal of Agriculture and Biology, Volume 6, Special Issue.
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