Assessment of Some Physico-Chemical Parameters of Lagos Lagoon, Southwestern Nigeria

Abstract

The pollution status of Lagos Lagoon was investigated to determine some physical and chemical parameters, in order to further understand its water quality. Five locations were selected according to the anthropogenic activities taking place in the areas. The measured parameters are water temperature, salinity, conductivity, pH, dissolved oxygen (DO) and alkalinity. The mean values ranged from 28.50-30.15°C for temperature, 7.86-8.50 for pH, ND-10.60‰ for salinity, 0.18-15.20µS/cm for electrical conductivity, 12.00-14.00 mg/l for alkalinity and 1.60-6.40 mg/l for dissolved oxygen. The statistical analysis of the measured physicochemical parameters revealed non-significant difference (p>0.05) across all stations in the physico-chemical parameters. Generally, the values obtained suggest the influence of anthropogenic activities especially the depletion of DO in most of the stations. Therefore, point source and non-point source pollution into the Lagos Lagoon should be controlled for the health and safety of the aquatic ecosystems. Generally, all the measured parameters were either below or within the permissible limits obtainable in the marine environment.

Determination of physicochemical parameters and heavy metals content of water samples from domestic and Kaduna River in Kaduna Metropolis, Kaduna State

“…This could be attributed to largest varieties of fresh water aquatic organisms prefer a pH range from 6.5-8.0 for growth and survival in the water (Oduor, 2000). This is similar to the results obtained by Oyeleke et al (2019) in water samples from Lagos lagoon with pH ranged of 7.86-8.50. Ewebiyi et al (2015) also obtained similar results on water pH recorded which were found to be in a range of 6.73-8.35, indicating that the water is near neutral and alkaline range.…”

Using benthic macroinvertebrates as bioindicators to evaluate the impact of anthropogenic stressors on water quality and sediment properties of a West African lagoon

“…Spatially, the temperature values ranged from 19.50 °C to 26.30 °C during the study period, with the highest mean temperature observed at site II (35.97 °C ± 1.16), similar to the work of Oyeleke et al [ 45 ], who recorded high-temperature range of 27 °C–30 °C in Lagos Lagoon. The temperature range obtained from this result could be due to the impact of land use within and around this waterbody as well as the climatic change, which could affect water quality through changes in evaporation, temperature, runoff, and rainfall pattern that can affect the mobilization of nutrients, distribution, and mobility of pollutants in aquatic ecosystems [ 46 ]. Climate change altered the physical, chemical, and biological functions of any waterbody, which could contribute to increased water temperature and decreased oxygen content [ 47 ].…”

Human Safety Evaluation of Heavy Metals, Physicochemical Parameters, and Microorganisms in Lagoon Water at Ikorodu Lighter Terminal in Lagos, Nigeria

“…It also agrees with the findings of Aina [21], who discovered non-permissible levels of certain physicochemical parameters in lagoon water obtained from selected jetty points along Ikorodu-Lagos Island in Lagos. On the other hand, Oyeleke et al [22] reported permissible levels of all physicochemical parameters assessed in water samples obtained at certain points along the Lagos Lagoon. Anthropogenic activities varied along the Lagos lagoons, which could explain the discrepancies in the findings of the cited literature.…”