Calcium Oxide - CAS 73018-51-6
Molecular Formula:
CaO
Molecular Weight:
56.077
COA:
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Description:
Calcium Oxide can be used as a solvent in textile and chemical fabrication processes.
Appearance:
White solid
Synonyms:
Lime Oxide
Solubility:
Soluble in water.
Storage:
Room Temperature
MSDS:
Inquire
Melting Point:
>300°C
InChIKey:
BRPQOXSCLDDYGP-UHFFFAOYSA-N
InChI:
InChI=1S/Ca.O/q+2;-2
Canonical SMILES:
[O-2].[Ca+2]
1.Effects of dicyandiamide and dolomite application on N2O emission from an acidic soil.
Shaaban M1, Wu Y2, Peng QA2, Lin S2, Mo Y2,3, Wu L2, Hu R4, Zhou W2. Environ Sci Pollut Res Int. 2016 Apr;23(7):6334-42. doi: 10.1007/s11356-015-5863-y. Epub 2015 Dec 1.
Soil acidification is a major problem for sustainable agriculture since it limits productivity of several crops. Liming is usually adopted to ameliorate soil acidity that can trigger soil processes such as nitrification, denitrification, and loss of nitrogen (N) as nitrous oxide (N2O) emissions. The loss of N following liming of acidic soils can be controlled by nitrification inhibitors (such as dicyandiamide). However, effects of nitrification inhibitors following liming of acidic soils are not well understood so far. Here, we conducted a laboratory study using an acidic soil to examine the effects of dolomite and dicyandiamide (DCD) application on N2O emissions. Three levels of DCD (0, 10, and 20 mg kg(-1); DCD0, DCD10, and DCD20, respectively) were applied to the acidic soil under two levels of dolomite (0 and 1 g kg(-1)) which were further treated with two levels of N fertilizer (0 and 200 mg N kg(-1)). Results showed that N2O emissions were highest at low soil pH levels in fertilizer-treated soil without application of DCD and dolomite.
2.[Stabilization Treatment of Pb and Zn in Contaminated Soils and Mechanism Studies].
Xie WQ, Li XM, Chen C, Chen XF, Zhong Y, Zhong ZY, Wan Y, Wang Y. Huan Jing Ke Xue. 2015 Dec;36(12):4609-14.
In the present work, the combined application of potassium dihydrogen phosphate, quick lime and potassium chloride was used to immobilize the Pb and Zn in contaminated soils. The efficiency of the process was evaluated through leaching tests and Tessier sequential extraction procedure. The mechanism of stabilization was analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM) to reveal the mechanism of stabilization. The results showed that the stabilizing efficiency of Pb contaminated soils was above 80% and the leaching concentrations of Pb, Zn were far below the threshold when the ratio of exogenous P and soil (mol · mol⁻¹) was 2:1-4: 1, the dosing ratio of CaO was 0.1%-0.5% ( mass fraction) and the dosage of potassium chloride was 0.02-0. 04 mol. Meanwhile, Pb and Zn in soil were transformed from the exchangeable fraction into residual fraction, which implied that the migration of Pb, Zn in soil could be confined by the stabilization treatment.
3.Detection of zinc oxide and cerium dioxide nanoparticles during drinking water treatment by rapid single particle ICP-MS methods.
Donovan AR1,2, Adams CD2,3, Ma Y1,2, Stephan C4, Eichholz T5, Shi H6,7. Anal Bioanal Chem. 2016 Mar 9. [Epub ahead of print]
Nanoparticles (NPs) entering water systems are an emerging concern as NPs are more frequently manufactured and used. Single particle inductively coupled plasma-mass spectrometry (SP-ICP-MS) methods were validated to detect Zn- and Ce-containing NPs in surface and drinking water using a short dwell time of 0.1 ms or lower, ensuring precision in single particle detection while eliminating the need for sample preparation. Using this technique, information regarding NP size, size distribution, particle concentration, and dissolved ion concentrations was obtained simultaneously. The fates of Zn- and Ce-NPs, including those found in river water and added engineered NPs, were evaluated by simulating a typical drinking water treatment process. Lime softening, alum coagulation, powdered activated carbon sorption, and disinfection by free chlorine were simulated sequentially using river water. Lime softening removed 38-53 % of Zn-containing and ZnO NPs and >99 % of Ce-containing and CeO2 NPs.
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CAS 73018-51-6 Calcium Oxide

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