Case Study Assignment.....Metals in the Environment, my topic is lead

Assignment.....Metals in the Environment, my topic is lead - Case Study Example d in the 1960’s concluded that the amount of lead introduced into the environment via human means was 100 times more than that the amount added naturally (Wright A. & Welbourn, 2002). This research proved that lead contamination was one of the hazards brought by industrialization. The form of lead that is most responsible for lead transmission is tetraethyl lead. Tetraethyl lead is a lead derivative that is used as an additive in gasoline. Other sources of inorganic lead are lead containing sweeteners, lead salts in paints and anticorrosion coats, in batteries, in protective glass that are used against radioactive substances and in insecticide. Lead is also used in water distribution networks and is also used in containers that hold food and drinks. The usage of lead in these sensitive areas can cause mobilization of lead if the liquid medium is soft, acidic or poorly buffered. This translates into lead contamination in drinking water and food and drink vessels. As mentioned afore, paints and anticorrosive agents contain high concentrations of lead. As anticorrosive coats or paints wear off they mobilize particles of lead dust into the air. Lead dust is a direct means of contact with lead particles, and it can also settle in soils or aquatic mediums. Most for ms of lead are insoluble. This means that even though practice of using lead derivative compounds in products has ceased, lead and its derivatives are still in the environment. The dispersal of lead is through three major mediums; the atmosphere, the water and the soil. The dispersal of inorganic lead through the atmosphere is dependent on the particle size of lead. Lead particles having larger size, greater than 2Â µm in diameter; tend to fall close to their source of origin. They continue to contaminate and pollute the water and soil around the source. Particles which are smaller in size, less than 2Â µm in diameter; are capable of travelling larger distances. Transference through atmosphere not only

Personal statement Example | Topics and Well Written Essays - 500 words - 4

Personal Statement Example This stage I suppose marked the instant I gained profound interest with depth of insight and respect toward medical profession in which personalized healthcare is highly regarded. With its highly standardized curricula in sciences and medicine, I believe that Ashford University is not only capable of facilitating students to achieve foundation with academic knowledge and skills in such fields but even of inculcating beliefs and values by which learners may be refined. Upon admission to the university’s Schar College of Nursing, I hope to accomplish pursuit of nursing studies through a competency-based program which enables each aspiring nurse to go after scholastic excellence, to develop scientific attitudes and traits that reflect nursing principles, and to strengthen my religious character in areas of compassion and perseverance. While in the academe, I expect to find improvement toward my capacity for hard work, creativity, motivating behavior, and cooperation. By academically exploring the world of patient care with a sense of commitment in saving human lives while taking part in enhancing individual health and well-being, I would be adequately equipped in reaching my ultimate dream of participating in a medical mission to promote health welfare across the world’s vast