basically about contaminating the land surface of the earth through dumping urban waste matter indiscriminately‚ dumping of industrial waste‚ mineral exploitation‚ and misusing the soil by harmful agricultural practices. Pollution includes visible litter and waste along with the soil itself being polluted. The soil gets polluted by the chemicals in pesticides and herbicides used for agricultural purposes along with waste matter being littered in urban areas such as roads‚ parks‚ and streets.
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any waste compounds introduced into such waterways will initiate biochemical reactions (such as shown above). Those biochemical reactions create what is measured in the laboratory as the Biochemical oxygen demand (BOD). Such chemicals are also liable to be broken down using strong oxidizing agents and these chemical reactions create what is measured in the laboratory as the Chemical oxygen demand (COD). Both the BOD and COD tests are a measure of the relative oxygen-depletion effect of a waste contaminant
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Non-biodegradable waste will NOT break down or at least NOT break down for many years. Examples of Non-biodegradable are plastics‚ metal and glass. Dangerous chemicals and toxins are also non-biodegradable‚ as are plastic grocery bags‚ plastic water bottles and other similar materials. Non-biodegradable trash has been a growing concern to environmentalists‚ but now is becoming a concern to anyone wanting to embrace a more eco-friendly lifestyle; as world population grows so does our waste. It’s
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Science Investigatory Project How to make a Biodegradable Plastic using cassava starch? ABSTRACT The study aims to produce biodegradable plastic using cassava starch as its main component. Cassava starch was mixed with water‚ epoxydized soya beanoil (ESBO)‚ glycerol‚ and polyvinyl alcohol (PVA). The mixture was then compressed and tested. Three preparations were made from the mixture. The first preparation contained 50 grams starch‚ 50 grams water‚ 50 grams PVA‚ 2.5 grams ESBO‚ and 2.5 grams
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Earth’s environment is in a sorry state‚ with no hope of getting it better any time soon. Wherever one looks‚ one encounters pollution in all its forms. Forests are disappearing. Green areas around cities are being replaced by concrete buildings. Waste products are being dumped indiscriminately. Water is too toxic to consume. The air is unfit for breathing in. Global warming has become a menacing issue. There are concerns about how long life ion earth‚ is going to survive. The human race is at the
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activities. Causes of Land Pollution 1. Degenerative Actions Degenerative Actions encompass a lot of human actions‚ including - deforestation‚ overuse of pesticides and chemical fertilizers‚ desertification‚ mining‚ inefficient and / or inadequate waste treatment‚ landfill‚ litter‚ etc. 2. Misuse of Land Misuse of Land mainly refers to felling of trees to clear land for agriculture‚ as well as processes like desertification and land conversion. Desertification is when anthropogenic effects of
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We keep our houses clean. We take utmost care of our bedroom‚ making sure no dust rests on our polished furniture. From walls to carpets‚ everything in our house is neat and clean and perfectly maintained. Then why do we fail to keep our environment clean; maintenance of which is far more vital as compared to our home? The term pollution means addition of any substance which alters the quality of the environment. Substances which cause pollution or alter the natural quality of the air‚ water and
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[1] Biodegradable plastics are plastics that are capable of being decomposed by bacteria or other living organisms. Two basic classes of biodegradable plastics exist:[1] Bioplastics‚ whose components are derived from renewable raw materials and plastics made from petrochemicals with biodegradable additives which enhance biodegradation There are concerns that "Oxo Biodegradable (OBD)" plastic bags may release metals‚ and
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plastic industry in the US alone is $ 50 billion per year and is obviously a tempting market for biotechnological enterprises. Biotechnological processes are being developed as an alternative to existing route or to get new biodegradable biopolymers. 20% of solid municipal wastes in US is plastic. Non-degradable plastics accumulate at the rate of 25 million tones per year. According to an estimate more than 100 million tones of plastic is
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Making a plastic from potato starch – extracting starch In this activity you are going to extract starch from potatoes. This starch can be used to make a plastic. A similar process is used in industry to extract starch‚ which is then used in a number of products‚ including food and packaging. You will need: q q q q q q Approx 100 g clean (not muddy) potatoes Grater Tea strainer Distilled water Pestle and mortar 100 cm3 measuring cylinder. What to do q q q q q Grate about 100
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