1.2.3. Chelating resins with amino/carboxyl group A series of amino/imino-carboxyl resins was synthesized in aqueous phase by a solid-phase synthesis method. The blown-up parameter confirms the feasibility for industrialization. Having exchange property with acid and base together. The resulting resins show good properties for the removal and even recovery of heavy-metal ions from their aqueous solutions or wastewater [33]. The Na form of two chelating ion exchange resins Chelex 100
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1.1 DETECTION OF Hg2+ Refer(1) Why is detection of Hg2+ important?? Mercury contamination poses severe health risks. It can enter into environment through natural as well as human activities. Once it enters marine environment‚ bacteria convert inorganic mercury to methyl mercury which enters food chain and is accumulated in large edible fish. Its imbalance can lead to neurological disorders and can cause Minamata disease. Procedure to detect Hg2+ 1. MS1 (Mercury Sensor 1)‚ a water soluble‚ fluorescein
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2.5. Characterization Methods 1H–NMR and 13C–NMR spectra of HPPP‚ BOMP and HVPA were taken in CDCl3 on Bruker DPX–300 MHz spectrometer using tetramethylsilane (TMS) as an internal standard. FT–IR spectra of the synthesized compounds‚ HPPP‚ BOMP‚ HVPA and photocrosslinked polymers were recorded on Perkin-Elmer system 2000 (4000–400 cm–1) spectrometer‚ using KBr pellets. Medium pressure mercury vapour lamp to the power output of 125W/cm2 was used for the photocrosslinking study. The viscosity of the
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The first recorded use of metals being used for personal protection dates before the medieval period and is thought to have originated in Eastern Europe where natives in Asia used iron rings that had been sewn to fabrics for protection. The Asian natives called this type of armour ring mail‚ which would later be known across the world as chain mail however chain mail was not discovered by the rest of the world until the Romans started to use it and chain mail was not truly developed until the medieval
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Heat was radiating off of my skin and the smell of iron filled my nostrils. The thick scent got caught in my throat and made my stomach churn. I started to choke on the air around me. A quick rush of liquid traveled from my belly and escaped through my mouth then I realized I was sitting in a cloud of fog. The ground below me was warm even though the air was cold. Sounds of people’s feet pattering around surrounded me but the fog was to thick to make out any human bodies. The patterning turned
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Final Paper – A Silver Dish by Saul Bellow In chaos theory‚ the butterfly effect is a term used to describe how such irrelevant details can drastically change future events. The butterfly effect is a way of describing how‚ unless all other factors can be accounted for‚ large systems such as weather remains impossible to predict with total accuracy because of the countless unknown variables. Any complicated system may be vulnerable to drastic change due to small details being added or erased
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One of the most powerful pieces was a book written by Alan Clark called ‘The Donkeys’. Alan Clark’s book became “the final epitaph of those who commanded the British Expeditionary Force”‚ through its title ‘The Donkeys’. The book reveals how the ‘lions’‚ British Expeditionary Force‚ were called upon the impossible when ordered by the coward generals‚ to go ‘over the top’ and eventually being sent
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10/24/2013 LAB TITLE: Single Replacement Reaction of Solid Copper with Silver Nitrate PURPOSE The purpose of this lab is to: • Observe a single replacement reaction‚ and • Calculate the mole ratio of silver (Ag) to copper (Cu) in the reaction MATERIALS • Copper wire (30 cm) • Large test tube • 250 ml beaker • Silver nitrate (AgNO3) powder • Dilute AgNO3 solution • Distilled water • Electronic balance • Glass stir rod • Watch glass
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of Gold or silver. The mathematician called his son and asked‚ "What is more valuable - gold or silver?" "Gold‚" said the son. "That is correct. Why is it then that the village headman makes fun of you‚ claims you do not know the value of gold or silver? He teases me every day. He mocks me before other village elders as a father who neglects his son. This hurts me. I feel everyone in the village is laughing behind my back because you do not know what is more valuable‚ gold or silver. Explain this
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of light on a surface coated with silver atoms. The reaction is possible due to the light-sensitive properties of silver halide crystals. Equation form for silver halides: Ag + + e - Ag Species produced include: Ag2+‚ Ag2o‚ Ag3+‚ Ag3o‚ Ag4+‚ Ag4o In 1556‚ the alchemist Fabricius was the first to discover that light can photochemically react with these crystals to change the silver ions (Ag+) to elemental silver (AgO). As the reaction proceeds‚ the silver atoms grow into clusters‚ which are
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