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Examining the Rate of Change of Some Physicochemical Properties of a Polluted Water Environment as a Result of Crude Oil Spill

Achinike Okogbule-wonodi, Ekperi N. I.

Abstract


This study was designed to look at how the physicochemical characteristics of the aquatic environment changed as a result of crude oil spillage. Samples were collected for analysis of physicochemical parameters, Total Dissolved Oxygen, Total Bacteria Counts (TBC) and Total Petroleum Hydrocarbon (TPH) content etc., for a period 84 days at 14 days intervals. Over the course of the analysis, the value of oil & grease varied between sampling points between 7.9 mg/l and 14.66 mg/l in salt water and 12.18 mg/l and 13.51 mg/l in fresh water. The measured dissolved oxygen concentration in the polluted water samples varied between 4.66 mg/l and 5.19 mg/l in polluted fresh water and between 2.79 mg/l and 4.06 mg/l in polluted salt water across the sampling locations and over the course of the study. Both before and after pollution, the iron content in salt water was larger than that in fresh water, and after pollution, the rate of iron decrease in salt water was similarly faster than that in fresh water. Thus, 62.44% iron content was reduced within 84 days in salt water, while 55.56% reduction was recorded in fresh water. Total dissolved solids (TDS), conductivity, chloride, sulphate, nitrate, turbidity, alkalinity, oil & grease, iron and total hardness were instantly increased after crude oil pollution, while pH and dissolved oxygen (DO) concentration decreased. However, during the monitoring periods, all the parameters decreased with time.


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