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Surface water quality of the Balu and Sitalakhya river, Bangladesh. Study on the concentration profile of some toxic metals and essential elements in water samples from the Sitalakhya and the Balu river, Bangladesh

Автор:   Muhammad I.
мягкая обложка
156 страниц
2010 год
Издательство:   Книга по Требованию
2277 руб
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Описание:The presented data on the status of river water will provide necessary information to establish water processing plants in future, the requirement of which increases at a tremendous rate due to growth of population, industrialization and arsenic contamination in tube well water. The experimental techniques employed were Atomic Absorption Spectrophotometry, UV-Visible spectrophotometry, Ion selective membrane electrode and titration. Phosphate concentration is also very high due to agricultural run off as phosphate fertilizers and phosphate detergents. Iron and Manganese concentration is higher than the standard permissible limit. The collected surface water were analyzed for the determination of trace elements and micro nutrients (lead, cadmium, iron, chromium, zinc, copper, manganese, nickel, cobalt, fluoride and phosphate) and alkalinity (hydroxide, carbonate and bicarbonate). The study revealed that the Balu river is relatively more polluted than the Sitalakhya river due to the direct discharge of industrial wastes of Tejgaon area, Dhaka and more municipal waste and agricultural run-off along the bank side of the river.

Orthomol Immun Junior Сила иммунитета на страже Вашего ребенка Orthomol Immun Junior Сила иммунитета на страже Вашего ребенка

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Another friend of mine once got in trouble with the government for breaking into computers. This had only recently been declared a crime, and the FBI found that their usual investigative technique didn't work. Police investigation apparently begins with a motive. The usual motives are few: drugs, money, sex, revenge. Intellectual curiosity was not one of the motives on the FBI's list. Indeed, the whole concept seemed foreign to them. Those in authority tend to be annoyed by hackers' general attitude of disobedience. But that disobedience is a byproduct of the qualities that make them good programmers. They may laugh at the CEO when he talks in generic corporate newspeech, but they also laugh at someone who tells them a certain problem can't be solved. Suppress one, and you suppress the other. This attitude is sometimes affected. Sometimes young programmers notice the eccentricities of eminent hackers and decide to adopt some of their own in order to seem smarter. The fake version is not merely annoying; the prickly attitude of these posers can actually slow the process of innovation ...»

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