J. I. Obianyo Keywords: Effect, Storage, Container, Water, Quality
Tropical Journal of Science and Technology 2020 1(1), 66-73. Published: June 29, 2020
This work studied the effect of storage containers on water quality. The objective was to know the best container for storage of water since water quality is subject to changes due to storage over time. Water samples were stored in five different containers, glass, plastic, clay pot, ceramic, and stainless steel for 28 days and was subjected to various tests using standard methods as in SMEWW (1992). Results showed that while the quality of water for pH, total dissolved solids (TDS), total solids (TS), electrical conductivity (EC), turbidity, total hardness, alkalinity, sulphate and nitrate deteriorated with time, there was an improvement in water quality for phosphate, chloride and Coliform count (MPN). It was also observed that no particular container is the best for water storage, but depends on the parameter of interest. For instance, clay pot is the best storage container if emphasis is on pH, TDS, TS, turbidity, alkalinity, and sulphate. Plastic is best in electrical conductivity while stainless steel is best in total hardness and Coliform count. Ceramic is best in nitrate and phosphate, while glass is the best storage container if chloride is emphasized. Coefficient of variation show that total hardness is more conservative and inert with the least value of variability of 0.003 while turbidity was most affected with value of 0.22 variability. Results also indicated that chemical parameters of stored water are more conservative than the physical parameters, and quality of water in all the storage containers were found to still fall within the WHO permissible limits/standards.