Abstract
The inorganic anion pollution of the New Calabar River surface water was investigated. Results showed seasonal variations in the inorganic anion levels. Water parameters such as sulfite, nitrate, phosphate, and alkalinity showed significantly higher values in the rainy season than in the dry season. Dissolved oxygen, pH, sulfide, sulfate, ammonia, and nitrite showed no significant differences between their rainy and dry season levels. Upstream-downstream changes were shown by conductivity, total dissolved solids, chloride, salinity, and temperature. Exceptions occurred in the nitrite levels, where the effect was minimal. Although the concentrations of some anions analyzed fell within internationally acceptable limits, the New Calabar River water is, in the main, polluted with inorganic anions and may be unacceptable for potable and industrial uses without treatment.
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Odokuma, L.O., Okpokwasili, G.C. Seasonal influences on inorganic anion monitoring of the New Calabar River, Nigeria. Environmental Management 17, 491–496 (1993). https://doi.org/10.1007/BF02394664
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DOI: https://doi.org/10.1007/BF02394664