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Journal of Medicinal Chemistry and Drug Discovery ISSN: 2347-9027 International peer reviewed Journal Special Issue Analytical Chemistry Teachers And Researchers Association National Convention/Seminar Issue 2, Vol. 1, pp 981-988, 28 February 2016, Available online at http://www.jmcdd.com Environmental Pollution Kulkarni G. A. A., Somwanshi J. L. and Khadke V. V. SMP College, Murum, Tq. Omerga Dist. Osmanabad Environmental pollution is “the contamination of the physical and biological components of the earth/atmosphere system to such an extent that normal environmental processes are adversely affected”. ”. “Pollution is the introduction of contaminants into the environment that cause harm or discomfort to humans or other living organisms, or that damage the environment” which can come “in the form of chemical substances, or energy such as noise, heat or light”. ““Pollutants can be naturally occurring substances or energies, but are considered contaminant contaminants when in excess of natural levels.” Pollution is “the addition of any substance or form of energy (e.g., heat, sound, radioactivity) to the environment at a rate faster than the environment can accommodate it by dispersion, breakdown, recycling, or storage stora in some harmless form”. “Pollution is a special case of habitat destruction; it is chemical destruction rather than the more obvious physical destruction. Pollution occurs in all habitats—land, habitats land, sea, and fresh water— water and in the atmosphere.” “Much of what we have come to call pollution is in reality the nonrecoverable matter resources and waste heat.” “Any use of natural resources at a rate higher than nature's capacity to restore itself can result in pollution of air, water, and land.” “Pollution is habitat contamination”. Perhaps the overriding theme of these definitions is the ability of the environment to absorb and adapt to changes brought about by human activities. In one word, environmental pollution takes place when the environment cannot process and neutralize harmful by-products products of human activities (for example, poisonous gas emissions) in due course without any structural or functional damage to its system. ISSN: 2347-9027 www.jmcdd.com Page 981 Journal of Medicinal Chemistry and Drug Discovery ISSN: 2347-9027 International peer reviewed Journal Special Issue Analytical Chemistry Teachers And Researchers Association National Convention/Seminar Issue 2, Vol. 1, pp 981-988, 28 February 2016, Available online at http://www.jmcdd.com In fact, “the due course” itself may last many years during which the nature will attempt to decompose the pollutants; in one of the worst cases – that of radioactive pollutants – it may take as long as thousands of years for the decomposition of such pollutants to be completed. Pollution occurs, on the one hand, because the natural environment does not know how to decompose the unnaturally naturally generated elements (i.e., anthropogenic pollutants), and, on the other, there is a lack of knowledge on the part of humans on how to decompose these pollutants artificially. Why does pollution matter? It matters first and foremost because it has negative impacts on crucial environmental services such as provision of clean air and clean water (and many others) without which life on Earth as we know it would not exist. Introduction to Environmental Pollution Although pollution had been known to exist for a very long time (at least since people started using fire thousands of years ago), it had seen the growth of truly global proportions only since the onset of the industrial rial revolution during the 19th century. The industrial revolution brought with it technological progress such as discovery of oil and its virtually universal use throughout different industries. Technological progress facilitated by super efficiency of capitalist apitalist business practices had probably become one of the main causes of serious deterioration of natural resources. At the same time, development of natural sciences led to the better understanding of negative effects produced by pollution on the enviro environment.Environmental nment.Environmental pollution is a problem both in developed and developing countries countries. Factors such as population growth and urbanization invariably place greater demands on the planet and stretch the use of natural resources to the maximum. It has been argued gued that the carrying capacity of Earth is significantly smaller than the demands placed on it by large numbers of human populations. And overuse of natural resources often results in nature’s degradation.It’s interesting to note that natural resources had been stored virtually untouched in the Earth for millions of years. ISSN: 2347-9027 www.jmcdd.com Page 982 Journal of Medicinal Chemistry and Drug Discovery ISSN: 2347-9027 International peer reviewed Journal Special Issue Analytical Chemistry Teachers And Researchers Association National Convention/Seminar Issue 2, Vol. 1, pp 981-988, 28 February 2016, Available online at http://www.jmcdd.com But since the start of the industrial revolution vast amounts of these resources had been exploited within a period of just a couple of hundred of years at unimaginable rates, rates with all the waste from this exploitation going straight in to the environment and seriously damaging its natural processes. What are they & how do they decompose? Environmental pollutants are constituent parts of the pollution process. They are the actual “executing agents”” of environmental pollution. They come in gaseous, gaseous solid or liquid form. It is interesting to note that, as of 1990, there were around 65,000 different chemicals in the marketplace, i.e. potential environmental pollutants that were to be released into air, water and land on a regular basis. We assume that, as of 2011 - 2012, this number may be significantly higher. Renowned author Miguel A. Santos identifies at le least three general characteristics of environmental pollutants Pollutants don't recognize boundaries, i.e. they are transboundary; Many of them can't be degraded by living organisms and therefore stay in the ecosphere for many years; and They destroybiota and habitat. These points emphasize that pollutants present a serious long-term long term global problem that affects more or less every country and, therefore, can only be solved by a coordinated set of actions and unwavering commitment of nations to international environmental agreements. In order to develop and implement an effective international policy for pollutants’ management, it is important, among other factors, to understand their decomposition mechanisms.We know that decomposition of pollutants can occur either biologically or physico-chemically chemically. Biological Decomposition of Environmental Pollutants It divides environmental pollutants into biodegradable and non-biodegradable biodegradablewhich describes them as follows. ISSN: 2347-9027 www.jmcdd.com Page 983 Journal of Medicinal Chemistry and Drug Discovery ISSN: 2347-9027 International peer reviewed Journal Special Issue Analytical Chemistry Teachers And Researchers Association National Convention/Seminar Issue 2, Vol. 1, pp 981-988, 28 February 2016, Available online at http://www.jmcdd.com Biodegradable Pollutants Biodegradable pollutants are the ones that can be broken down and processed by living organisms,, including organic waste products, phosphates, and inorganic salts. For example, if a pollutant is organic, it can be used by a living organism to obtain energy and other material from carbohydrates, proteins etc. Therefore, biodegradable pollutants are only “temporary nuisances” that can be neutralized and converted into harmless compounds. However, it is important to remember that they can become serious pollutants poll if released in large amounts in small areas, thus exceeding the natural capacity of the environment to “assimilate” them. Non-Biodegradable Biodegradable Pollutants Non-biodegradable biodegradable pollutants are the ones that cannot be decomposed by living organisms and therefore fore persist in the ecosphere for extremely long periods of time. They include plastics, metal, glass, some pesticides and herbicides, and radioactive isotopes.In addition to that, fat soluble (but not water soluble) non-biodegradable biodegradable pollutants, ex. mercury ry and some hydrocarbons, are not excreted with urine but are accumulated in the fat of living organisms and cannot be metabolized. Non-Biological Biological Decomposition of Environmental Pollutants Non-biological biological decomposition of non-biodegradable non biodegradable pollutants requires requi a combination of many factors, such as wind, water and climate to work together to achieve neutralization of pollutants. Some of the most dangerous pollutants such as radioactive isotopes can decompose by themselves but it will take them thousands of years. y Types of Environmental Pollution Generally speaking, there are many types of environmental pollution but the most important ones are: Air pollution ISSN: 2347-9027 www.jmcdd.com Page 984 Journal of Medicinal Chemistry and Drug Discovery ISSN: 2347-9027 International peer reviewed Journal Special Issue Analytical Chemistry Teachers And Researchers Association National Convention/Seminar Issue 2, Vol. 1, pp 981-988, 28 February 2016, Available online at http://www.jmcdd.com Water pollution Soil pollution (contamination) Some of the most notable air pollutants are sulfur dioxide, nitrogen dioxide, carbon monoxide, ozone, volatile organic compounds (VOCs) and airborne particles, with radioactive pollutants probably among the most destructive ones (specifically when produced by nuclear explosions). Our Air Pollutants article provides a clear overview of sources and effects of these air pollutants.Water Water pollutants include insecticides and herbicides, food processing waste, pollutants from livestock operations, volatile organic compounds (VOCs), heavy metals, chemical waste and others. Some soil pollutants are: hydrocarbons, solvents and heavy metals. So where does environmental pollution come from? Sources of Environmental Pollution In modern ern industrialized societies, fossil fuels (oil, gas, coal) transcended virtually all imaginable barriers and firmly established themselves in our everyday lives. Not only do we use fossil fuels for our obvious everyday needs (such as filling a car), as we well as in the powergenerating industry, they (specifically oil) are also present in such products as all sorts of plastics, solvents, detergents, asphalt, lubricating oils, a wide range of chemicals for industrial use, etc. Combustion of fossil fuels produces prod extremely high levels of air pollution and is widely recognized as one of the most important “target” areas for reduction and control of environmental pollution. Fossil fuels also contribute to soil contamination and water pollution. For example, when oil is transported from the point of its production to further destinations by pipelines, an oil leak from the pipeline may occur and pollute soil and subsequently groundwater. When oil is transported by tankers by ocean, an oil spill may occur and pollut pollute ocean water. Of course, there are other natural resources whose exploitation is a cause of serious pollution; for example, the use of uranium for nuclear power generation produces extremely dangerous waste that would take thousands of years to neutralize. neutraliz ISSN: 2347-9027 www.jmcdd.com Page 985 Journal of Medicinal Chemistry and Drug Discovery ISSN: 2347-9027 International peer reviewed Journal Special Issue Analytical Chemistry Teachers And Researchers Association National Convention/Seminar Issue 2, Vol. 1, pp 981-988, 28 February 2016, Available online at http://www.jmcdd.com But there is no reasonable doubt that fossil fuels are among the most serious sources of environmental pollution.Power-generating pollution.Power generating plants and transport are probably the biggest sources of fossil fuel pollution. Common sources of fossil fuel pollution are: Industry: Power-generating generating plants Petroleum refineries Petrochemical plants Production and distribution of fossil fuels Other manufacturing facilities Transport: Road transport (motor vehicles) Shipping industry Aircraft Fossil fuel combustion is also a major source of carbon dioxide (CO2) emissions and perhaps the most important cause of global warming.. Learn more about the causes and effects of global warming here. Other Sources of Environmental Pollution Among other pollution sources, agriculture (livestock farming) is worth mentioning as the largest generator of ammonia emissions resulting in air pollution. Chemicals such as pesticides and fertilizers are also widely used in agriculture, which may lead water pollution and soil contamination as well. Trading activities may be another source of environmental pollution. For example, it’s been recently noted that packaging of products sold in supermarkets and other retail outlets is far too excessive and ge generates nerates large quantities of solid waste that ends up either in landfills or municipal incinerators leading to soil contamination and air pollution. ISSN: 2347-9027 www.jmcdd.com Page 986 Journal of Medicinal Chemistry and Drug Discovery ISSN: 2347-9027 International peer reviewed Journal Special Issue Analytical Chemistry Teachers And Researchers Association National Convention/Seminar Issue 2, Vol. 1, pp 981-988, 28 February 2016, Available online at http://www.jmcdd.com Residential sector is another significant source of pollution generating solid municipal waste that may ay end up in landfills or incinerators leading to soil contamination and air pollution.Our uniqueanalysis of Causes of Pollution will give you an excellent perspective on the fundamental pollution drivers such as globalization, industrialization and population growth. growth Since air pollution is one of the largest areas of environmental pollution studies, our discussion on Air Pollution Causes explains how each major pollutant contributes specifically to air pollution. Environmental Pollution Effects Environmental pollutioneffects pollution can be truly damaging. Some me of the effects of air pollution include asthma, reduced energy levels, irritation of eyes, disruption of the immune system, malfunction of the central nervous system, cancer. Water pollution can cause skin rashes & allergies, all sorts of water-borne water infections, fections, vomiting & stomach aches, malfunction of the central nervous system and so on. Soil pollution is, in a way, connected to water pollution and may cause cancer, headaches, fatigue, skin rashes and so on. Removal of Air Pollutants from the Atmosphere Atmosphe Air pollutants, as opposed to solid and liquid pollutants found on land and in water, may be removed from the atmosphere through wet deposition or dry deposition. deposition In case of wet deposition pollutants make way into clouds or other precipitation and then get deposited onto the surface of the Earth by way of rain. In case of dry deposition, pollutants are deposited directly onto the planet's surface and vegetation, such as plants and and trees of tropical rainforests. We may assume that once air pollution has been deposited onto the planet's surface, the normal rules of biological and non-biological biological decomposition for other types of pollutants will apply. Environmental Pollution - Conclusion Conclu Environmental pollution is causing a lot of distress not only to humans but also animals, driving many animal species to endangerment and even extinction. The Transboundary nature of environmental pollution makes it even more difficult to manage it – you cannot build brick walls along the borders of your country or put customs cabins at every point of entry to regulate its flows into your country. ISSN: 2347-9027 www.jmcdd.com Page 987 Journal of Medicinal Chemistry and Drug Discovery ISSN: 2347-9027 International peer reviewed Journal Special Issue Analytical Chemistry Teachers And Researchers Association National Convention/Seminar Issue 2, Vol. 1, pp 981-988, 28 February 2016, Available online at http://www.jmcdd.com Everything on our planet is interconnected,, and while the nature supplies us with valuable environmental services without which we cannot exist, we all depend on each other’s actions and the way we treat natural resources. It’s widely recognized that we are hugely overspending our current budget of o natural resources – at the existing rates of its exploitation, there is no way for the environment to recover in good time and continue “performing” well in the future. Perhaps we should adopt a holistic view of nature – it is not an entity that exists separately from us; the nature is us, we are an inalienable part of it, and we should care for it in the most appropriate manner. Only then can we possibly solve the problem of environmental pollution. References 1. Kemp, D. D. (1998). The Environment Dictio Dictionary.. London: Routledge , p. 129. Retrieved December 23, 2011 from Questia.com 2. Pollution. (March 16, 2008). In Wikipedia, The Free Encyclopedia.. Retrieved April 3, 2008 from http://en.wikipedia.org/w/index.php?title=Pollution&oldid= 198701164 3. Pollution. (2011). In Encyclopedia Britannica Britannica.. Retrieved December 23, 2011 from: http://www.britannica.com/EBchecked/topic/468070/pollution 4. Santos, M. A. (1990). Managing Planet Earth: Perspectives on Population, Ecology, and the Law.. Westport, CT: Bergin & Garvey, p. 44. Retrieved April 3, 2008 5. Ehrlich, P. R., Ehrlich, A. H., & Holdren, J. P. (1977). Ecoscience: Population, Resources, Environment. Environment. San Francisco: W. H. Freeman, p. 536. Retrieved November 22, 2008 6. Acid rain. (March 2, 2008). In Wikipedia, The Free Encyclopedia.. Retrieved April 3, 2008 from http://en.wikipedia.org/w/index.php?title=Acid_rain&oldid=195436025 7. Gardiner, L. (February, 2006). Air Pollution Affects Plants, Animals, and Environments. Environments Windows to the Universe. Retrieved April 3, 2008 ISSN: 2347-9027 www.jmcdd.com Page 988