CN105954216A - Method for measuring concentration of silicate in high-concentration hydrogen sulfide hydrothermal solution - Google Patents
Method for measuring concentration of silicate in high-concentration hydrogen sulfide hydrothermal solution Download PDFInfo
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Abstract
The present invention relates to a method for measuring the concentration of silicate in a high-concentration hydrogen sulfide hydrothermal solution. The concentration of sulfur ions in a water sample is measured by a sulfide ionic selective electrode, and sulfur ions are removed based on the precipitation method. Firstly, silicate-sulfur ion standard solutions of different concentrations are prepared, and the pH values of the solutions are adjusted to be 5.00-6.00. After that, a zinc sulfate solution is added to precipitate sulfur ions into zinc sulfide precipitates. The solutions are aged for several hours and then are filtered, so that the precipitates in the solutions are removed. Filtrates are obtained for later use. Based on the silico-molybdenum blue spectrophotometry, the absorbance of each filtrate at the wavelength of 810 nm is measured, and then a silicate-sulfur ion standard curve is drawn. In the same condition, the absorbance of the high-concentration hydrogen sulfide hydrothermal solution water sample is measured. Based on the standard curve, the concentration of silicate in the high-concentration hydrogen sulfide hydrothermal solution water sample is figured out. The above method is simple in operation and avoids the measurement trouble caused by easily oxidized sulfur ions. Therefore, the measurement result is more accurate. The reliability of measuring the silicate content in the hydrothermal solution is improved.
Description
Technical field
The present invention is nutritive salt analysis field, relates to the mensuration of silicate concentration in a kind of high-concentration hydrogen sulfide hydrothermal solution
Method.
Background technology
Silicon is the nutritive salt necessary to flood and field many biological growths, and it is to kind planktonic in ocean
Class composition has a major impact, and Deep-sea Hydrothermal System is a special ingredient of marine ecosystems, studies silicon
The distribution in Hydrothermal System of the content of hydrochlorate and change are to biocenological distribution, ecology in research Hydrothermal System
Environmental effect and Ecology Evolution have great importance.Silicate the most classical in marine monitoring specification at present is surveyed
The method of determining is Silicon Molybdenum Blue Spectrophotometry, but in the hydrothermal solution of high-concentration hydrogen sulfide, sulphion is very easy to quilt
It is oxidized into sulfur simple substance, the mensuration of interference absorbance, thus affects the accuracy of the method, so exploring one
The Accurate Determining analysis method being suitable for silicate in high-concentration hydrogen sulfide hydrothermal solution water sample has important practical significance.
The method of the most relatively conventional sulphion interference removing higher concentration in sea water has oxidizing process and acidifying
Method.Wherein oxidizing process is that in the sea water of acidifying after addition excess bromine water, sulphion is oxidized into sulfur simple substance,
Being filtered by sulfur simple substance, and be passed through the bromine of air removing excess, but bromine is difficult to be divided, the bromine not eliminated is direct
Affect the chromogenic reaction in Silicon Molybdenum Blue Spectrophotometry, and the method operation is more complicated；Acidization is by sea
Water acidifying then passes to high pure nitrogen and removes hydrogen sulfide gas, and hydrogen sulfide can not be completely removed by the method.
The present invention is to use the sedimentation method to remove sulphion, it is provided that silicate in a kind of hydrothermal solution containing sulphion
Assay method, it is adaptable to measuring the sulfur-containing anion concentration hydrothermal solution in 50～700 μm ol/L, the method is not compared to
Removing sulphion and directly measure silicate method, capacity of resisting disturbance is strong, and its result is more accurate, improves height
The reliability that in concentration of H 2 S hydrothermal solution, silicate content measures.
Summary of the invention
Present invention aim at providing a kind of accuracy good, silicic acid in the hydrothermal solution of the high concentration sulphion that controllability is strong
The analysis method of salt.
The assay method of silicate concentration in a kind of high-concentration hydrogen sulfide hydrothermal solution, step is as follows: take high concentration to be measured
Hydrogen sulfide hydrothermal solution water sample, uses sulfide ionic selective electrode to determine the concentration of sulphion in water sample；Take silicate molten
Liquid, adds sodium sulfide solution, prepares silicate-sulphion standard solution, makes the dense of sulphion in standard solution
Spend basically identical with above-mentioned water sample；The pH=5.00～6.00 of the standard solution that regulation is prepared, adds standard solution
0.5～1.0mol/L solution of zinc sulfate of volume 1/180～1/18mL, generates zinc sulfide precipitation, ageing after reaction
1～24h, the microporous fibre membrane filtration using aperture to be 0.22～0.45 μm, discard precipitation, divide with silicon molybdenum blue
Light photometry, measures filtrate absorbance under 810nm wavelength, draws standard curve；Standard solution is replaced
Change high-concentration hydrogen sulfide hydrothermal solution water sample to be measured into, then measure the absorbance of water sample in aforementioned manners, bent according to standard
The concentration of silicate in water sample obtained by line.
In a kind of preferred implementation of said method, specifically comprise the following steps that
1) take some high-concentration hydrogen sulfide hydrothermal solution water samples to be measured, use sulfide ionic selective electrode to determine in water sample
The concentration of sulphion；
2) take silicate solutions, add sodium sulfide solution, prepare silicate-sulphion standard solution, make standard
In solution, the concentration of sulphion is basically identical with high-concentration hydrogen sulfide hydrothermal solution water sample to be measured；
3) measuring the silicate-sulphion standard solution two parts of 90mL same concentration respectively, a addition is extremely
In 100mL beaker A, in a addition to 100mL volumetric flask B；
4) in beaker A, add between dilute sulfuric acid regulation pH to 5.00～6.00, record dilute sulfuric acid used
Consumption V1ML, then by V1Dilute sulfuric acid identical for mL adds in volumetric flask to regulate the pH of solution；
5) solution of zinc sulfate of the 0.5～1.0mol/L of addition 0.5～5.0mL is in 100mL volumetric flask B, molten
Liquid becomes cloudy, and is settled to 100mL with deionized water, shakes up, and is aged 1～24h；
6) with solution in vacuum negative pressure filter filtration capacity bottle B, the micropore using 0.22～0.45 μm is fine
Dimension filter membrane, in filter process, filters in four times, and first three time takes 15～25mL solution respectively and filter, and uses
Filtrate cleans vacuum negative pressure filter, after the 4th time has been filtered, discards precipitation, and filtrate is stand-by；
7) measure filtrate absorbance under 810nm wavelength with Silicon Molybdenum Blue Spectrophotometry, draw standard curve；
8) standard solution is replaced to high-concentration hydrogen sulfide hydrothermal solution water sample to be measured, repeats 3) to 7) measure water sample
Absorbance, obtain the concentration of silicate in this water sample according to standard curve；
The method of the present invention is applicable to the hydrothermal solution water sample analyzing sulfur-containing anion concentration in 50～700 μm ol/L.
The Method And Principle of the present invention is under mildly acidic conditions, and sulphion and zinc ion generate zinc sulfide precipitation, warp
Ageing, filtration, measure filtrate absorbance at 810nm with Silicon Molybdenum Blue Spectrophotometry.The present invention is carried
In the high-concentration hydrogen sulfide hydrothermal solution of confession, silicate analysis method for measuring has advantage highlighted below: (1) operation is simple
Single (2) reagent and consumptive material are conveniently easy to get high (4) good stability of (3) accuracy.
Detailed description of the invention:
Embodiment 1
(1) take some hydrothermal solution water samples, application sulfide ionic selective electrode record in high concentration hydrothermal solution water sample sulfur from
Sub-concentration is 150 μMs；
(2) take silicate solutions, add sodium sulfide solution, prepare silicate-sulphion standard solution, make mark
In quasi-solution, the concentration of sulphion is basically identical with water sample；
(3) measuring the silicate-sulphion standard solution two parts of 90mL same concentration respectively, a addition is extremely
In 100mL beaker A, in a addition to 100mL volumetric flask B；
(4) in beaker A, dilute sulfuric acid regulation pH to 5.00, amount V of record dilute sulfuric acid used are added1ML,
According to V1In mL pondage bottle, the pH of solution is 5.00；
(5) solution of zinc sulfate of addition 1.0mL 0.5mol/L is in 100mL volumetric flask B, and solution becomes muddy
Turbid, with deionized water constant volume to 100mL, shake up, be aged 1h；
(6) limit of the microporous fibre filter membrane that aperture is 0.22 μm is clamped with the antimagnetic type tweezer being covered with polyethylene film
Edge, immerses in the hydrochloric acid solution of 0.5mol/L the most straight down, soak 12h, be washed with deionized water in
Property, seal stand-by；With the solution in vacuum negative pressure filter filtration capacity bottle B, using aperture is 0.22 μm
Microporous fibre filter membrane, in filter process, filter in four times, first three time takes 15mL solution respectively and filters,
Cleaning vacuum negative pressure filter with filtrate, after the 4th time has been filtered, discard precipitation, filtrate is stand-by；
(7) with Silicon Molybdenum Blue Spectrophotometry, measure filtrate absorbance under 810nm wavelength, draw standard
Curve；
(8) repetition (3) is to the absorbance of (7) step measurements water sample, obtains water sample according to standard curve
Average silicate concentration is 16.4 μMs, and relative standard deviation is 2.01%.
Embodiment 2
(1) laboratory preparation simulation high-concentration hydrogen sulfide hydrothermal solution water sample, wherein sulphion concentration is 300 μMs,
Silicate concentration is 5.00 μMs；
(2) take silicate solutions, add sodium sulfide solution, prepare silicate-sulphion standard solution, make mark
In quasi-solution, the concentration of sulphion is basically identical with water sample；
(3) measuring the silicate-sulphion standard solution two parts of 90mL same concentration respectively, a addition is extremely
In 100mL beaker A, in a addition to 100mL volumetric flask B；
(4) in beaker A, dilute sulfuric acid regulation pH to 6.00, amount V of record dilute sulfuric acid used are added1ML,
According to V1In mL pondage bottle, the pH of solution is 6.00；
(5) solution of zinc sulfate of addition 3.0mL 1.0mol/L is in 100mL volumetric flask B, and solution becomes muddy
Turbid, with deionized water constant volume to 100mL, shake up, be aged 24h；
(6) limit of the microporous fibre filter membrane that aperture is 0.45 μm is clamped with the antimagnetic type tweezer being covered with polyethylene film
Edge, immerses in the hydrochloric acid solution of 3.0mol/L the most straight down, soak 24h, be washed with deionized water in
Property, seal stand-by；With the solution in vacuum negative pressure filter filtration capacity bottle B, using aperture is 0.45 μm
Microporous fibre filter membrane, in filter process, filter in four times, first three time takes 25mL solution respectively and filters,
Cleaning vacuum negative pressure filter with filtrate, after the 4th time has been filtered, discard precipitation, filtrate is stand-by；
(7) with Silicon Molybdenum Blue Spectrophotometry, measure filtrate absorbance under 810nm wavelength, draw standard
Curve；
(8) repetition (4) is to the absorbance of (7) step measurements simulated water sample, obtains water according to standard curve
The silicate concentration of sample is 4.99 μMs, and relative error is 0.20%.
Embodiment 3
(1) laboratory preparation simulation high-concentration hydrogen sulfide hydrothermal solution water sample, wherein sulphion concentration is 700 μMs,
Silicate concentration is 20.00 μMs；
(2) take silicate solutions, add sodium sulfide solution, prepare silicate-sulphion standard solution, make mark
In quasi-solution, the concentration of sulphion is basically identical with water sample；
(3) measuring the silicate-sulphion standard solution two parts of 90mL same concentration respectively, a addition is extremely
In 100mL beaker A, in a addition to 100mL volumetric flask B；
(4) in beaker A, dilute sulfuric acid regulation pH to 5.13, amount V of record dilute sulfuric acid used are added1ML,
According to V1In mL pondage bottle, the pH of solution is 5.13；
(5) solution of zinc sulfate of addition 5mL 1.0mol/L is in 100mL volumetric flask B, solution turned cloudy,
With deionized water constant volume to 100mL, shake up, be aged 3h；
(6) limit of the microporous fibre filter membrane that aperture is 0.45 μm is clamped with the antimagnetic type tweezer being covered with polyethylene film
Edge, immerses in the hydrochloric acid solution of 0.5mol/L the most straight down, soak 12h, be washed with deionized water in
Property, seal stand-by；With the solution in vacuum negative pressure filter filtration capacity bottle B, using aperture is 0.45 μm
Microporous fibre filter membrane, in filter process, filter in four times, first three time takes 25mL solution respectively and filters,
Cleaning vacuum negative pressure filter with filtrate, after the 4th time has been filtered, discard precipitation, filtrate is stand-by；
(7) with Silicon Molybdenum Blue Spectrophotometry, measure filtrate absorbance under 810nm wavelength, draw standard
Curve；
(8) repetition (3) is to the absorbance of (7) step measurements simulated water sample, obtains water according to standard curve
The silicate concentration of sample is 19.80 μMs, and relative error is 1.00%.
Embodiment 4
(1) laboratory preparation simulation high-concentration hydrogen sulfide hydrothermal solution water sample, wherein sulphion concentration is 150 μMs,
Silicate concentration is 25.00 μMs；
(2) take silicate solutions, add sodium sulfide solution, prepare silicate-sulphion standard solution, make mark
In quasi-solution, the concentration of sulphion is basically identical with water sample；
(3) measuring the silicate-sulphion standard solution two parts of 90mL same concentration respectively, a addition is extremely
In 100mL beaker A, in a addition to 100mL volumetric flask B；
(4) in beaker A, dilute sulfuric acid regulation pH to 5.08, amount V of record dilute sulfuric acid used are added1ML,
According to V1In mL pondage bottle, the pH of solution is 5.08；
(5) solution of zinc sulfate of addition 5.0mL 0.5mol/L is in 100mL volumetric flask B, and solution becomes muddy
Turbid, with deionized water constant volume to 100mL, shake up, be aged 24h；
(6) limit of the microporous fibre filter membrane that aperture is 0.22 μm is clamped with the antimagnetic type tweezer being covered with polyethylene film
Edge, immerses in the hydrochloric acid solution of 1.0mol/L the most straight down, soak 24h, be washed with deionized water in
Property, seal stand-by；With the solution in vacuum negative pressure filter filtration capacity bottle B, using aperture is 0.22 μm
Microporous fibre filter membrane, in filter process, filter in four times, first three time takes 25mL solution respectively and filters,
Cleaning vacuum negative pressure filter with filtrate, after the 4th time has been filtered, discard precipitation, filtrate is stand-by；
(7) with Silicon Molybdenum Blue Spectrophotometry, measure filtrate absorbance under 810nm wavelength, draw standard
Curve；
(8) repetition (3) is to the absorbance of (7) step measurements simulated water sample, obtains water according to standard curve
The silicate concentration of sample is 25.00 μMs, and relative error is 0%.
Embodiment 5
(1) laboratory preparation simulation high-concentration hydrogen sulfide hydrothermal solution water sample, wherein sulphion concentration is 50 μMs,
Silicate concentration is 20.00 μMs；
(2) take silicate solutions, add sodium sulfide solution, prepare silicate-sulphion standard solution, make mark
In quasi-solution, the concentration of sulphion is basically identical with water sample；
(3) measuring the silicate-sulphion standard solution two parts of 90mL same concentration respectively, a addition is extremely
In 100mL beaker A, in a addition to 100mL volumetric flask B；
(4) in beaker A, dilute sulfuric acid regulation pH to 5.13, amount V of record dilute sulfuric acid used are added1ML,
According to V1In mL pondage bottle, the pH of solution is 5.13；
(5) solution of zinc sulfate of addition 0.5mL 0.5mol/L is in 100mL volumetric flask B, and solution becomes muddy
Turbid, with deionized water constant volume to 100mL, shake up, be aged 3h；
(6) limit of the microporous fibre filter membrane that aperture is 0.45 μm is clamped with the antimagnetic type tweezer being covered with polyethylene film
Edge, immerses in the hydrochloric acid solution of 0.5mol/L the most straight down, soak 12h, be washed with deionized water in
Property, seal stand-by；With the solution in vacuum negative pressure filter filtration capacity bottle B, using aperture is 0.45 μm
Microporous fibre filter membrane, in filter process, filter in four times, first three time takes 25mL solution respectively and filters,
Cleaning vacuum negative pressure filter with filtrate, after the 4th time has been filtered, discard precipitation, filtrate is stand-by；
(7) with Silicon Molybdenum Blue Spectrophotometry, measure filtrate absorbance under 810nm wavelength, draw standard
Curve；
(8) repetition (3) is to the absorbance of (7) step measurements simulated water sample, obtains water according to standard curve
The silicate concentration of sample is 19.90 μMs, and relative error is 0.50%.
Claims (3)
1. the assay method of silicate concentration in a high-concentration hydrogen sulfide hydrothermal solution, it is characterised in that step is as follows:
Take high-concentration hydrogen sulfide hydrothermal solution water sample to be measured, use sulfide ionic selective electrode to determine the dense of sulphion in water sample
Degree；Take silicate solutions, add sodium sulfide solution, prepare silicate-sulphion standard solution, make standard molten
In liquid, the concentration of sulphion is basically identical with above-mentioned water sample；The standard solution that regulation is prepared
PH=5.00～6.00, adds 0.5～1.0mol/L solution of zinc sulfate of standard solution volume 1/180～1/18mL,
Generate zinc sulfide precipitation after reaction, be aged 1～24h, the microporous fibre filter membrane using aperture to be 0.22～0.45 μm
Filter, discard precipitation, with Silicon Molybdenum Blue Spectrophotometry, measure filtrate absorbance under 810nm wavelength,
Draw standard curve；Standard solution is replaced to high-concentration hydrogen sulfide hydrothermal solution water sample to be measured, then surveys in aforementioned manners
Determine the absorbance of water sample, obtain the concentration of silicate in water sample according to standard curve.
Method the most according to claim 1, it is characterised in that specifically comprising the following steps that of method
1) take some high-concentration hydrogen sulfide hydrothermal solution water samples to be measured, use sulfide ionic selective electrode to determine in water sample
The concentration of sulphion；
2) take silicate solutions, add sodium sulfide solution, prepare silicate-sulphion standard solution, make standard
In solution, the concentration of sulphion is basically identical with high-concentration hydrogen sulfide hydrothermal solution water sample to be measured；
3) measuring the silicate-sulphion standard solution two parts of 90mL same concentration respectively, a addition is extremely
In 100mL beaker A, in a addition to 100mL volumetric flask B；
4) in beaker A, add between dilute sulfuric acid regulation pH to 5.00～6.00, record dilute sulfuric acid used
Consumption V1ML, then by V1Dilute sulfuric acid identical for mL adds in volumetric flask to regulate the pH of solution；
5) solution of zinc sulfate of the 0.5～1.0mol/L of addition 0.5～5.0mL is in 100mL volumetric flask B, molten
Liquid becomes cloudy, and is settled to 100mL with deionized water, shakes up, and is aged 1～24h；
6) with solution in vacuum negative pressure filter filtration capacity bottle B, the micropore using 0.22～0.45 μm is fine
Dimension filter membrane, in filter process, filters in four times, and first three time takes 15～25mL solution respectively and filter, and uses
Filtrate cleans vacuum negative pressure filter, after the 4th time has been filtered, discards precipitation, and filtrate is stand-by；
7) measure filtrate absorbance under 810nm wavelength with Silicon Molybdenum Blue Spectrophotometry, draw standard curve；
8) standard solution is replaced to high-concentration hydrogen sulfide hydrothermal solution water sample to be measured, repeats 3) to 7) measure water sample
Absorbance, obtain the concentration of silicate in this water sample according to standard curve.
3. the purposes of a method as claimed in claim 1, it is characterised in that be applicable to analyze sulfur-containing anion
Concentration is at the hydrothermal solution water sample of 50～700 μm ol/L.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907380A (en) * | 2019-12-25 | 2020-03-24 | 安徽清大云博环保科技有限公司 | Method for measuring trace silicate in water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3796265A (en) * | 1972-06-07 | 1974-03-12 | J Eickmeier | Method for producing high hydrogen sulfide content gas wells |
| CN1400177A (en) * | 2001-08-03 | 2003-03-05 | 周定才 | Method for treating industrial waste water of lump pyrite |
| CN103332810A (en) * | 2013-07-24 | 2013-10-02 | 武汉大学 | Treatment method of heavy metals in desulfurization waste water |
-
2016
- 2016-04-28 CN CN201610280344.1A patent/CN105954216B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3796265A (en) * | 1972-06-07 | 1974-03-12 | J Eickmeier | Method for producing high hydrogen sulfide content gas wells |
| CN1400177A (en) * | 2001-08-03 | 2003-03-05 | 周定才 | Method for treating industrial waste water of lump pyrite |
| CN103332810A (en) * | 2013-07-24 | 2013-10-02 | 武汉大学 | Treatment method of heavy metals in desulfurization waste water |
Non-Patent Citations (2)
| Title |
|---|
| 张海林等: "含硫气田污水三级除硫技术研究", 《广州化工》 * |
| 潘文静等: "海水中硅酸盐快速测定的实验研究", 《大连海事大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907380A (en) * | 2019-12-25 | 2020-03-24 | 安徽清大云博环保科技有限公司 | Method for measuring trace silicate in water |
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