Abstract: Pollution of the environment can be determined by means of biological methods with the help of bioindicators-organisms which give information on the quality vance of their environment. In the present study the first trace mercury bio-monitoring using seabirds’ dejections is investigated in the Arzew gulf. Excrements analysis from ten stations using ICP-MS shows high level (Hg) contamination up to 2.27 ± 0.05 µg.g^-1. Dejections’ contamination is due to mercury bioaccumulation via web food owing to the presence of this contaminant in coastal area coming from anthropogenic activities. Potential transfer of mercury to human causing health damage is very likely because of population fisheries consummation. Urgent measures must be taken to remedy this pollution aspect and prevent human health.

Abstract: This study assesses the cholera incidence in urban slum in Lagos State, Nigeria with the emphasis on high risk of unimproved sources of water for domestic use and unsanitary environment. The study uses sets of one hundred and twenty structured guided questionnaires were randomly administered to obtain information on residents’ opinions and experiences on the risk and incidence of cholera in the area. Ten water samples were spatially collected from storage containers of the residents for microbial assessment Results of social survey instrument showed there was cholera incidence and the area is still at high risk as revealed from the result of coliform bacilli with high most probable number (MPN) count found in 6 of the 16 sampled water as well as the faecal coliform found virtually in all sampled water. The study concluded that increasing population of urban centres has been a major contributor to the unsanitary environmental, continuous use of unimproved sources of water as well as environmental health problems such as slum cholera risk and incidence. Therefore, for sustainable friendly and free diseases’ environment provision of habitable and conducive environment for the slum residents should be the priority of government.

Abstract: Excessive nitrogenous compounds released into the public water bodies not only result in direct toxicity to aquatic animals, but also increase the overgrowth of aquatic plants resulting eutrophication. Nitrogen pollution has major effects on both human health and the ecological functions of natural ecosystems. This causes a spike in algae growth, which can rapidly deplete the dissolved oxygen in a body of water, causing harm to fish and the surrounding ecosystem. For this reason, it is necessary to study the process of nitrogen removal in wastewater treatment plants in order to remove nitrogen efficiently. The processes of nitrification and denitrification in a sequencing batch reactor. A nitrate test kit and spectrophotometer in order to measure nitrate concentrations throughout the various stages of our reactor cycles. Initially found it difficult to achieve nitrification in our plant. After increasing the dissolved oxygen levels during our aeration stage, nitrate began to be formed. In order to achieve higher levels of nitrification, it was necessary to increase the length of the aeration stage. It was also necessary to increase the length of the anaerobic phase in order to allow for significant denitrification.

Abstract: In connection with the growing anthropogenic impact the protection of environment became the global issue. The portion to the environmental pollution made by the mining industry is significant. The territory of North Ossetia is located in the zone of high seismicity and it is characterized by the greatest seismic risk, since in conditions of high seismic hazard there is the greatest density of population in North Caucasus. In the case of earthquakes with intensity of 5 points the site, folded by some type of soil and occupied by tailings dump (wastes of mining industry), will be under active impact. To assess the pollution of the territory as closely related parameter, the development of neoplasm among the inhabitants of the urbanized mountain territory on the example of Vladikavkaz city was investigated.

Abstract: The iodine content of water, soil, salt and cereals have been analyzed using Atomic Absorption Spectroscopy (AAS), titrimetry, Fusion and ion selective electrode methods at Geological Survey of Ethiopia, Geosciences Laboratory Center, Addis Ababa, Ethiopia. From the view point of analytical result, the chloride, sodium, potassium, calcium, manganese and magnesium, which are considered as goitrogens are with high concentrations while that of iodine is significantly low (p = 0.055). Likewise, the concentrations of iodine in all the water samples fall in the ranges of the iodine concentration of the various parts of the world, 15µg/l. The iodine concentration in the soil samples taken from non-farm lands (no use of chemical inputs) is significantly higher (p = 0.001) than that of farm lands. Iodine concentration in wheat and barley samples is observed to be significantly low (p = 0.002). This is the major guide to draw the conclusion that community using this water, cereals and salt could face the insufficiencies of iodine in their dietary, which in turn would cause less up-take of iodine by the body resulting iodine deficiency disorder and endemic goiter among the population. Thus, the main approaches to tackle the challenges are the use of iodized salt and oil, fortification of food, water and condiments and distribution of iodine tablets.