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Submitted by Mamun on
1. Environmental effect of CFL Mercury in a CFL lamp is harmful for our environment. The mercury content of a good quality CFL is 5-6 milligram. 1 cubic feet of soil can accommodate maximum 300 nanogram of mercury, so 1 CFL will require at least 589,000 cubic feet of soil! As such mercury content of CFL is hazardous. Now, if you tell poor people getting light but you give so much harmful mercury which will effect our future, even mercury pollute water level, fish and we will get kidney, brain, liver problem, women got early abortion etc. You can just check mercury effect on fish and water search by google. For any developing project, we will see benefit and bad side. If long term visible and indirect side of danger list are longer then benefit, we drop the developments. Now, cfl efficiency is you tell 55lm/watt but unfortunately we get 30 to 40 which lumen decay is very fast almost 50 % gone after 100 hrs and life written 5000 hrs but 2000 hrs to 3000 hrs is the best maximum. I give you world bank documents 2.2.4 Component E. Compact Fluorescent Lamp (CFL) 12. in 2010, under the ELIB program supported by the RERED project, about 10 million CFLs were distributed to households in exchange for incandescent lamps in 2010. However, post-installation surveys have indicated alarming levels of lamp failures. REB, the implementing agency, has claimed replacement of the poor quality bulbs from the supplier. The second-phase procurement of 17.5 million CFLs was initiated in late 2010 under the RERED project (before the post-installation survey results of the first phase was available), but due to various issues (including issues related to submission of fraudulent performance guarantees by the winning bidder) the procurement could not be completed. Improper disposal of CFL bulbs regarding health impact of mercury. The technical specifications of the CFLs supported under the project required the mercury content to be no more than 5 milligrams per unit. Given the large number of CFLs supported under the project (about 7 million to be procured in addition to the 10.5 million procured under the RERED project) can have a collective significant impact on the environment if not disposed of properly. Elemental (metallic) mercury and all of its compounds are toxic, exposure to excessive levels can permanently damage or fatally injure the brain and kidneys. Elemental mercury can also be absorbed through the skin and cause allergic reactions. Ingestion of inorganic mercury compounds can cause severe renal and gastrointestinal damage. Organic compounds of mercury such as methyl mercury are considered the most toxic forms of the element. Exposures to very small amounts of these compounds can result in devastating neurological damage and death. When mercury enters bodies of water, biological processes transform it to methyl mercury, a highly toxic and bio-accumulative form. For fetuses, infants and children, the primary health effects of mercury are on neurological development. Even low levels of mercury exposure such as result from mother's consumption methyl-mercury in dietary sources can adversely affect the brain and nervous system. Impacts on memory, attention, language and other skills have been found in children exposed to moderate levels in the womb. Also breakage of a single CFL bulb in a room can result mercury vapor levels much higher than any international standard for prolonged exposure. However, one of the advantages is recycling of a CFL bulb. Virtually all the component can be recycled- the metal end caps, glass tubing, mercury and phosphor power can all be separated and reused. The metallic portion can be sold as scrap metal, recycled glass can be remanufactured into other glass products and mercury can be recycled into new CFL bulb and other mercury containing devices. You can find this documents http://www.idcol.org/Download/RERED_II_ESMF.pdf