Due to the desire of nations to enhance their economic status, industrialization is vigorously pursued. Industrialization is historically associated with environmental degradation. In developing countries, due to lack of environmental awareness, the level of industrialization is not commensurate with environmental studies and monitoring. This study was designed to assess the status of particulate matter at three emerging industrial sites in Port Harcourt. To achieve this, Aerocet 531 monitor was used. To be able to communicate properly with the general public, data obtained were expressed in terms of Air Quality Index (AQI). The results showed that industrial sites had higher concentrations compared to the control for both PM 2.5 and PM 10 . Seasonal variation of PM 2.5 and PM 10 were observed with the dry season indicating concentrations higher than the local acceptable limits of 150 µg/m 3 and 230 µg/m 3 . The AQI of the three emerging industrial sites indicated a category for 'good' to 'moderate' for wet season while for dry season, they varied from 'very unhealthy' to 'hazardous' in all the sampling areas. This poses a great threat to health and environment of the inhabitants.

The water quality and periphyton parameters were investigated at 5 designated stations along Ntawogba stream system that lies within the Port Harcourt metropolis located between latitude 4º5” N and 5º 00”N and longitude 6º55” E and 7º 00”E. Sampling was done for dry (January – March 2004) and wet (June – August 2004)seasons using standard procedures. Samples were collected at the designated stations along the water course for physicochemical (temperature, pH, conductivity, alkalinity DO, BOD5, NO3, NH3, PO4, SO4) and periphyton descriptors (species richness, species diversity, abundance, biomass, and productivity). The spatio-temporal differences for the parameters were evaluated and the physicochemical attributes demonstrated spatial and seasonal trends but were essentially not statistically significant while the periphyton descriptors demonstrated seasonal and spatial differences and are more reliably affected by the waste water discharges.

Abstract:The effects of sodium bromide (NaBr)

No abstract

This study evaluated physical and chemical properties and calculated the Water Quality Index of the Anya Ogologo River in Rivers State, Nigeria. Four stations along the river were identified for this study based on accessibility and activities taking place on the river bank. Water and sediment sample collection were conducted once a week every month spanning a period of four months (February-May). In-situ measurements of surface water were taken for the following parameters: pH, salinity, electric conductivity, total dissolved solids, dissolved oxygen and temperature. Surface water was collected from each station to the laboratory and analysed for phosphate, nitrate sulphate, biochemical oxygen demand, and metals (lead, cadmium, manganese and copper). The parameters studied showed variations across stations. Sediment samples indicated the presence of manganese and copper metals. The WQI values observed were as follows; station 1: 55.07%, station 2: 43.58%, station 3: 56.29% and station 4: 67.10%. This indicates that generally the river is unsuitable for drinking, swimming, irrigation particularly.