Carbonate Complex
Carbonate Complex - Related Videos
19:58
Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
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Cited by 1 •
2017
Detailed and generalized protocols are presented for the synthesis and subsequent purification of four palladium N-heterocyclic carbene complexes from benzimidazolium salts. The complexes were tested for catalytic activity in arylation and Suzuki-Miyaura reactions. For each reaction investigated, at least one of the four complexes successfully catalyzed the reaction.
01:14
The Carbon Cycle
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2019
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle. Biological Carbon Cycle All...
10:41
Carbon and Nitrogen Analysis of Environmental Samples
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Elemental Analysis is a method used to determine elemental composition of a material. In environmental samples such as soils, scientists are particularly interested in the amounts of two ecologically important elements, nitrogen and carbon. Elemental analysis by the flash combustion technique works by oxidizing the sample with a catalyst through combustion in a high-temperature chamber. The products of combustion are...
11:14
Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
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Cited by 7 •
2017
A protocol for the parallel production of precipitated calcium carbonate and zeolitic material from blast furnace slag via mineral carbonation and alkaline hydrothermal conversion, respectively, is presented. The performance of the zeolitic material towards nickel adsorption is tested.
01:24
Carbonation Shrinkage
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2024
Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage. The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction facilitates the...
FAQs
pH helps determine how carbonate complexes are distributed among free carbonate, bicarbonate, dissolved metal species, and solid phases. As pH changes, the relative amounts of these forms can shift, altering which species remains dissolved or contributes to mineral formation. This makes pH a central control variable when interpreting carbonate-rich waters or predicting precipitation behavior.
The oxygen atoms of carbonate provide the binding sites, and the ligand may attach in monodentate, bidentate, or bridging arrangements. Monodentate and bidentate forms differ in how many oxygen atoms associate with one metal center, whereas bridging structures can connect metal centers. These alternatives help account for varied coordination patterns and reactivity.
Metal identity and concentration influence equilibria among free carbonate, bicarbonate, dissolved metals, and solid phases. A carbonate complex therefore cannot be interpreted solely from ligand presence; the surrounding metal and its abundance also affect the observed speciation. This matters when comparing waters or designing conditions for separation or precipitation control.
Interpretation should consider pH, carbonate and bicarbonate levels, dissolved metal concentrations, and possible solid phases. These variables describe the relevant equilibria and help distinguish among chemical forms rather than treating carbonate-containing water as chemically uniform. This framework supports aqueous analysis and evaluation of mineral formation potential.
In natural waters, carbonate coordination provides a way to connect dissolved metal behavior with carbonate and bicarbonate equilibria and solid phases. Changes in these relationships help explain metal transport through carbonate-rich environments and the conditions associated with mineral formation. Consequently, the same chemical framework links water composition to geological processes.
In laboratory and industrial chemistry, carbonate coordination supports aqueous analysis, separation processes, precipitation control, and the design of metal-containing materials. Its value is practical because speciation information helps relate dissolved metals and solid phases to the conditions being managed. This makes carbonate chemistry relevant to controlling mineral formation and developing useful metal-based materials.