Crystallographical Characteristics of Solar Salts Produced from Jeonnam Area by X-Ray Diffraction Technique

정병조,; 김용,; 김창대,; 현승철,; 함경식,

doi:10.3746/jkfn.2009.38.9.1284

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…The XRD standard for the three compounds viz., Na 2 S • 5H 2 O (Mereiter et al 1984;Jeong et al 2009), NaSH (Jacobs et al 1991), and Na 2 CO 3 (Palsche et al 1951;Swanson et al 1959) were analyzed and compared with the XRD pattern of the product generated from this experiment. Fig.…”

Section: Effect Of Naoh Concentrationmentioning

confidence: 99%

Optimization of Sodium Hydrosulfide Synthesis for Metal Recovery from Wastewater Using Flue Gas Containing H2S

Kim

Behera²,

Jamal

et al. 2016

J. Environ. Eng.

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Sodium hydrosulfide (NaSH), which is utilized for recovering rare metals, was synthesized in a laboratory-scale batch reactor by absorbing a simulated flue gas containing H 2 S into NaOH solution. The effects of H 2 S flow rate, NaOH concentration, and reaction time on the synthesis of NaSH were examined. With an increase in the H 2 S flow rate, the absorption ratio, conversion ratio, and total NaSH productivity showed a decreasing tendency. On the other hand, a higher concentration of NaSH could be synthesized with a higher concentration of NaOH. Most of the Na 2 S (the intermediate product) were produced at a pH > 12, and the NaSH synthesis reaction was feasible at a pH 11.5. Contrary to the increased H 2 S flow rate, increased NaOH concentration resulted in an enhanced Na 2 S=NaSH ratio. With a maximum equivalent ratio of NaOH=H 2 S at 0.88, the chemical composition of the product could maintain equilibrium with the highest NaSH concentration and less than 1% weight-to-weight ratio (w/w) Na 2 S concentration.

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Section: Effect Of Naoh Concentrationmentioning

confidence: 99%

Optimization of Sodium Hydrosulfide Synthesis for Metal Recovery from Wastewater Using Flue Gas Containing H2S

Kim

Behera²,

Jamal

et al. 2016

J. Environ. Eng.

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show abstract

Effects of Different Kinds of Salt in the Comutagenicity and Growth of Cancer Cells

Zhao¹,

Kim²,

Qi³

et al. 2012

Journal of the Korean Society of Food Science and Nutrition

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The Physical and Chemical Properties of Salt Manufactured by New Process with Brine Produced in Korean Salt-farms

김경미¹,

김인철²

2013

Journal of the Korean Society of Food Science and Nutrition

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Solar salt is manufactured naturally, and therefore, it contains insoluble substances such as sandy compounds. This study is performed in order to effectively produce clean sea salt by removing the impurities in sea salt through filtration and evaporation in a vacuum condition. Brine was concentrated and crystallized at 90°C by a rotary vacuum evaporator, which was then recovered as salt crystals by filtration, and then the salt was dehydrated. Manufacturing yields were determined by the amount of water evaporation. Brine was concentrated to 40%, 50% and 60% of the initial volume of brine and manufactured salt were designated as 40S, 50S and 60S, respectively. The salt produced by this process is called ESBS (evaporated salt with brine from salt-farm). The yield of 40S, 50S and 60S were 7.22%, 10.79% and 15.06%, respectively. The NaCl concentration of 40S and 50S were 90.38% and 91.16%, respectively. From a sensory evaluation analysis, the most tasty salt was 40S and the bitter salt was 60S. The average contents of sand compound and insoluble substances in ESBS were 0.001∼0.012% and 0.067∼0.12%, respectively. The mineral compositions, such as Na, Mg, K, and Ca of 40S and 50S were similar with those of the natural solar salt. In solubility tests, the solubility (g of salt/100 mL H2O/sec) of 40S, 50S, and 60S was 0.69, 0.70, and 0.69, respectively. On the other hand, the solubility of natural solar salt was 0.47. By comparing the water reabsorption rate analysis results, water reabsorption rate of 40S and 50S was about 3 to 5 times lower than that of the solar salt. In the aspects of physical and chemical properties, such as minerals, impurities, solubility and moisture re-absorption rate, salts developed in this study are judged to be better than that of the general solar salt.

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Crystallographical Characteristics of Solar Salts Produced from Jeonnam Area by X-Ray Diffraction Technique

Cited by 3 publications

References 5 publications

Optimization of Sodium Hydrosulfide Synthesis for Metal Recovery from Wastewater Using Flue Gas Containing H2S

Optimization of Sodium Hydrosulfide Synthesis for Metal Recovery from Wastewater Using Flue Gas Containing H2S

Effects of Different Kinds of Salt in the Comutagenicity and Growth of Cancer Cells

The Physical and Chemical Properties of Salt Manufactured by New Process with Brine Produced in Korean Salt-farms

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