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Potassium nitrate

About: Potassium nitrate is a research topic. Over the lifetime, 3537 publications have been published within this topic receiving 29450 citations. The topic is also known as: Nitric acid, potassium salt & Saltpeter.


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Patent
08 Apr 2015
TL;DR: The ammonium polyphosphate chelate fertilizer is simple in process, scientific in proportioning and suitable for foliage spraying and irrigation fertilization, and can also be used as solid and liquid additives to be added to macroelement fertilizers as mentioned in this paper.
Abstract: The invention discloses an ammonium polyphosphate chelate fertilizer as well as a preparation method and application thereof. The ammonium polyphosphate chelate fertilizer is prepared from the following raw materials in parts by weight: 20 to 40 parts of ammonium polyphosphate, 5 to 10 parts of magnesium sulfate, 5 to 10 parts of zinc sulfate, 1 to 5 parts of manganese sulfate, 5 to 10 parts of boric acid, 10 to 15 parts of calcium nitrate, 0.1 to 2 parts of ammonium molybdate, 1 to 5 parts of ferrous sulfate, and 8 to 15 parts of potassium nitrate. The ammonium polyphosphate chelate fertilizer is simple in process, scientific in proportioning and suitable for foliage spraying and irrigation fertilization, and can also be used as solid and liquid additives to be added to macroelement fertilizers.

10 citations

Patent
20 Jun 2012
TL;DR: In this paper, a method for detecting a content of calcium oxide in limestone, which comprises providing a disodium ethylenediaminetetraacetate standard solution, mixing a limestone or quicklime sample with hydrochloric acid, dissolving the sample, and adding triethanolamine and potassium hydroxide to obtain a mixed solution.
Abstract: The present invention provides a method for detecting a content of calcium oxide in limestone, which comprises providing a disodium ethylenediaminetetraacetate standard solution; mixing a limestone or quicklime sample with hydrochloric acid, dissolving the sample, and adding triethanolamine and potassium hydroxide to obtain a mixed solution; adding a calcein indicator composition into the mixed solution to obtain a to-be-detected solution, wherein the calcein indicator composition comprises 3,3'-bis[N,N-bis(carboxymethyl)aminomethyl]fluorescein, and arsenazo III and/or potassium nitrate; and titrating the detected solution with the standard solution until the end point that is the detected solution turns to red from yellow-green fluorescence, and calculating out the calcium oxide content The inventive method has short flow, high speed and high detection accuracy

10 citations

Patent
16 Apr 2014
TL;DR: In this paper, a preparation method of an aqueous single-layer graphene solution is described, in which natural graphite, calcium nitrate, potassium nitrates, concentrated sulfuric acid and potassium permanganate are mixed and processed to obtain a graphite oxide solution.
Abstract: The invention discloses a preparation method of an aqueous single-layer graphene solution According to the method, natural graphite, calcium nitrate, potassium nitrate, concentrated sulfuric acid and potassium permanganate are mixed and processed to obtain a graphite oxide solution, and after the graphite oxide solution is prepared into an aqueous single-layer graphene oxide solution, a reducing agent is added for a reaction, and the aqueous single-layer graphene solution is obtained According to the method, the aqueous single-layer graphene solution with high single layer rate, strong compositing feature and uniform dispersion is prepared finally after multiple times of ultrasonic stripping

10 citations

Journal ArticleDOI
TL;DR: Investigation of the inhibitory effect of nitrate on the dynamics of sulfate-reducing bacteria (SRB) community in a laboratory-scale wastewater reactor revealed that nitrate addition remarkably attenuated a distinct group of dSRB related to Desulfovibrio, whereas other dsrB groups were not influenced.
Abstract: The biogenic production of hydrogen sulfide is a serious problem associated with wastewater treatment. The aim of this study was to investigate the inhibitory effect of nitrate on the dynamics of sulfate-reducing bacteria (SRB) community in a laboratory-scale wastewater reactor, originating from a denitrifying plant using activated sludge. For this purpose, denaturing gradient gel electrophoresis (DGGE) analysis targeting the dsrB (dissimilatory sulfite reductase) gene was used in combination with chemical analyses and measurement of oxidation and reduction potential (ORP). The reactors were initially dosed with 1.0 and 4.0 g/L potassium nitrate and anaerobically incubated for 490 h. Addition of 4.0 g/L nitrate to the reactor was associated with a prolonged inhibition (over 300 h, i.e., 12.5 days) of sulfate reduction and this was consistent with a rapid decrease in ORP associated with nitrate depletion. The DGGE analysis revealed that nitrate addition remarkably attenuated a distinct group of dsrB related to Desulfovibrio, whereas other dsrB groups were not influenced. Furthermore, another sulfate reduction by Syntrophobacter in the later stages of the incubation period occurred in both reactors (regardless of the nitrate concentration), suggesting that different SRB groups are associated with sulfate reduction at different stages of the wastewater treatment process.

10 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202334
202268
202139
202064
2019167
2018241