MATERIALS AND METHODS
Landfill Leachate Sampling and Analysis
Landfill leachate was collected from Jhiri dumpsite, Ranchi, Jharkhand, India at regular intervals for the study. Presently, the corporation dumps waste generated by the city’s household at an 11 acre area in Jhiri village (23˚24’ N and 85˚15’ E). The landfill is in operation for last 15 years and it is an open one with no liners and no provision for leachate collection and storage. Leachate gets collected at the bottom of landfill in low lying areas of dumpsite. Prior landfill leachate collection for the experiments, plastic bags and other solid waste was removed from the surface layer of leachate. Landfill leachate was collected and stored in a HDPE container under cold conditions until use.
Experimental Scheme
The experimental scheme in this study is as mentioned:
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→ Fe3+ + OH-
Also, Fe3+ ions formed can consume H2O2 to generate Fe2+ and hydroperoxyl radicals (HO2.). Therefore, higher Fe2+ concentration has got less significance for the oxidation reaction as this becomes detrimental to COD removal (Loures et al. 2013). Figure 5: Effect of Fe2+ concentration on COD removal during pre-treatment of landfill leachate by Fenton oxidation.
Effect of different strength of landfill leachate on treatment by Fenton process
Strength of landfill leachate was varied to increase the efficiency of Fenton oxidation, this was done to assess the influence of dilution, for instance, if landfill leachate are co-treated with municipal wastewater. COD concentration was varied by diluting landfill leachate with tap water. Fig.6 shows that COD removal efficiency increased from 94% to 98% when landfill leachate was diluted 30 times. Therefore, after diluting the landfill leachate efficiency of COD removal by Fenton process increased by 4%. Maximum COD removal was achieved at 30 times initial dilution of leachate which gave an initial COD of 240 mg/L and final COD after treatment was reduced to 4.5
Topic: This research proposal relates closely to the textbook, Garbology, Our Love Affair with Trash. Edward Humes discusses how current landfills are constructed to protect the environment from leachate in several chapters, but in Chapter 4, “The Last and Future Kingdom,” he writes about the dangers of landfills built before the 1990s (2013). Landfills built before the 1991 regulations are not required to install barriers that protect the groundwater from carcinogens. According to the American Cancer Society, prolonged exposure to carcinogens in the environment can lead to cancer ( “Known and Probable,”2017).
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Discussion of Treatment Plant: The Yonkers Wastewater Treatment Plant or Yonkers WWTP was constructed in the late 1920s and began its operation in the 1930s. Yonkers WWTP is top 5% in plant size. It consist of 9 pumping stations, processing 80 million gallons of raw sewage daily and up to 120 million gallons daily. Furthermore, the plant services 500 thousand people or half the population in Westchester County.
In this experiment, a balanced chemical equation will be provided for decomposition reactions. A redox reaction is a reaction where one reactant is reduced due to a gain of electrons, and the other is oxidized due to a loss of electrons. The reactant that loses an electron is called the reducing agent, whereas the reactant that gains an electron is called the oxidizing agent. In this experiment, the balanced chemical equation, and the two half equations for the redox reactions will be provided, and the oxidizing and reducing agents will be
II. History The Littleton/Englewood Wastewater Treatment Plant (L/E WWTP) has been operating since April of 1977; the third largest publicly owned treatment works (POTW) in Colorado. In 1972 the City of Englewood and the City of Littleton had two separate, smaller facilities that were in need of improvement to meet the new minimum of 85% treatment efficiency removal
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In “The Hidden Life of Garbage,” Heather Rogers writes about the waste disposal in the United States and how dangerous is getting. Land dumping has been the main disposal method for many years because of the low cost. She writes how landfill is a designed construction in which the trash is far away from the environment. Therefore, isolation is accomplished with a bottom liner and a daily covering of soil. She also says that a sanitary landfill uses a clay liner to isolate the trash from the environment.
Out of all minerals in the world, I believe Pyrite is an important mineral that is pertinent to the everyday life of mankind. “The name "pyrite" is after the Greek "pyr" meaning fire. This name was given because pyrite can be used to create the sparks needed for starting a fire if it is struck against metal or another hard material ”(King). Pyrite also contains a unique physical quality that amplifies its use. Pyrite, commonly known as Fools Gold has provided emotional strength, healing, industrial benefits, and its role in human history has proven significant.
Pollution Technology has increased a lot in the last century and this created inventions that changed the world as it was known the humans, but these inventions and the industry of these inventions did create new problems that humans never faced before. Because of this increase of pollution new problems came to humans, for example, human health problems such as heart problems, lung problems, and skin problems. One more bigger problem is the rise of the temperature because of the global warming which will increase the temperature in the earth’s atmosphere and then the temperature will start to melt the ice around the world which will increase the sea level and this will create a lot more bigger problems, and these are only some of the problems
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Introduction An oxidation-reduction reaction involves transferring electrons in a chemical reaction. In a redox reaction, there are oxidizing agents that gain electrons and cause other substances to lose electrons, and reducing agents that lose electrons and cause other substances to gain electrons. Oxidation-reduction reactions are applied in many real-life situations. These reactions are often found in electrochemical batteries, photosynthesis and the burning of fossil fuels.1
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