CN111135674A - Absorption liquid for collecting gas-phase arsenic with different valence states - Google Patents
Absorption liquid for collecting gas-phase arsenic with different valence states Download PDFInfo
- Publication number
- CN111135674A CN111135674A CN202010011953.3A CN202010011953A CN111135674A CN 111135674 A CN111135674 A CN 111135674A CN 202010011953 A CN202010011953 A CN 202010011953A CN 111135674 A CN111135674 A CN 111135674A
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- China
- Prior art keywords
- absorption liquid
- arsenic
- acid
- absorption
- concentration
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/60—Additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/55—Compounds of silicon, phosphorus, germanium or arsenic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
- G01N2001/2217—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption using a liquid
Abstract
The invention discloses an absorption liquid for collecting gas-phase arsenic with different valence states. The absorption liquid contains acid and antioxidant. Wherein the acid is hydrochloric acid or oxalic acid; the antioxidant is ascorbic acid. The concentration of hydrochloric acid in the absorption liquid is 0.5-2 mol/L, and the concentration of oxalic acid is 0.05-0.2 mol/L. The concentration of the ascorbic acid in the absorption liquid is 0.1-0.5 mol/L. The absorption liquid has high absorption efficiency and low oxidability, and the ascorbic acid in the absorption liquid can prevent trivalent arsenic from being oxidized in the sampling process, and can be used for collecting gas-phase arsenic pollutants with different valence states.
Description
Technical Field
The invention belongs to the field of pollutant sampling, and particularly relates to absorption liquid for collecting gas-phase arsenic with different valence states.
Background
Arsenic is one of the most carcinogenic and hazardous substances in the natural environment. The toxicity of arsenic depends not only on its content but also on its form of presence. Arsenic in flue gas generated by fuel incineration mainly exists in an inorganic form, the arsenic in the flue gas can be directly discharged into the atmospheric environment along with the flue gas, and As3+Is far more toxic than As5+. The total content of arsenic in the flue gas and arsenic with different valence states are accurately analyzed, and the harm of the arsenic in the flue gas can be reasonably evaluated, so that the method has important research value and practical significance.
CN107167347A discloses a portable gas collection bag, but the sampling volume of the gas collection bag is limited, and the arsenic concentration in the gas is usually low, so that the sampling volume is very small and cannot be detected. The current national standard test method for the emission of the fixed source pollutants in China is a 'method for measuring particulate matters in the exhaust gas of the fixed pollution source and sampling gaseous pollutants' (GB/T16157-1996), and the method does not consider the conversion of arsenic form in sampling, so that the method is only suitable for the collection of total arsenic, but cannot collect the arsenic content in different valence states in the flue gas.
Disclosure of Invention
The invention aims to provide an absorption liquid for collecting gas-phase arsenic with different valence states.
The invention adopts the following technical scheme for realizing the aim;
an absorption liquid for collecting gas-phase arsenic with different valence states. The absorption liquid contains acid and antioxidant. Wherein the acid is hydrochloric acid or oxalic acid; the antioxidant is ascorbic acid. The concentration of hydrochloric acid in the absorption liquid is 0.5-2 mol/L, and the concentration of oxalic acid is 0.05-0.2 mol/L. The concentration of the ascorbic acid in the absorption liquid is 0.1-0.5 mol/L.
Compared with the prior art, the invention has the following advantages: the absorption liquid has low oxidation, ascorbic acid in the absorption liquid has oxidation resistance, trivalent arsenic in the sampling process can be prevented from being oxidized, and the absorption liquid can be used for collecting gas-phase arsenic pollutants with different valence states in flue gas.
Detailed Description
The present invention is further illustrated in detail below with reference to specific examples.
Example 1
150mL of an absorbent solution containing 0.5mol/L hydrochloric acid, 0.1mol/L oxalic acid and 0.3mol/L ascorbic acid was prepared and designated as absorbent solution 1. 150mL of an absorbent solution containing 1mol/L hydrochloric acid, 0.1mol/L oxalic acid and 0.3mol/L ascorbic acid was prepared and designated as absorbent solution 2. 150mL of an absorbent solution containing 5% by volume of nitric acid and 10% by volume of hydrogen peroxide was prepared and designated as absorbent solution 3.
And respectively pouring the absorption liquid into 250mL absorption bottles of the same model, and respectively introducing 200mL/min simulated flue gas containing gas-phase arsenic with a certain concentration into the absorption bottles, wherein the simulated flue gas contains 5% of oxygen by volume fraction, and the balance of nitrogen. The aeration time was 30 minutes. And (5) measuring the content of arsenic in the absorption liquid after the experiment is finished.
Each set of experiments was repeated 3 times and the test results are shown in table 1.
Table 1 test results of example 1
As shown in Table 1, under the experimental conditions, when the concentration of hydrochloric acid in the absorption solution is 0.5mol/L, the absorption effect substantially consistent with that of the absorption solution 3 can be achieved, which indicates that better absorption efficiency can be achieved at the hydrochloric acid concentration.
Example 2
Three types of the same absorption liquids as in example 1 were prepared and designated as absorption liquids 4, 5, and 6, respectively.
And respectively pouring the absorption liquid into 250mL absorption bottles of the same model, and respectively introducing 300mL/min simulated flue gas containing gas-phase arsenic with a certain concentration into the absorption bottles, wherein the simulated flue gas contains 5% of oxygen by volume fraction, and the balance of nitrogen. The aeration time was 30 minutes. And (5) measuring the content of arsenic in the absorption liquid after the experiment is finished.
Each set of experiments was repeated 3 times and the test results are shown in table 2.
Table 2 test results of example 2
As can be seen from Table 2, under the experimental conditions, when the concentration of hydrochloric acid in the absorption liquid was 0.5mol/L, the absorption effect was poor. And when the concentration of hydrochloric acid in the absorption liquid is 1mol/L, the absorption effect basically consistent with that of the absorption liquid 3 can be achieved, which shows that better absorption efficiency can be achieved under the concentration of hydrochloric acid.
Example 3
The 150mL of the solution containing 1ppmAs3+1mol/L hydrochloric acid, 0.1mol/L oxalic acid and 0.3mol/L ascorbic acid, and is named as absorption liquid 7. The 150mL of the solution containing 1ppmAs3+The absorption solution is 1mol/L hydrochloric acid, 0.1mol/L oxalic acid and 0.5mol/L ascorbic acid and is named as absorption solution 8.
And respectively pouring the absorption liquid into 250mL absorption bottles with the same model, and respectively introducing 300mL/min of simulated smoke into the absorption bottles, wherein the simulated smoke contains 20% of oxygen by volume fraction, and the balance of nitrogen. The aeration time was 30 minutes. And (4) measuring the content of arsenic with different valence states in the absorption liquid after the experiment is finished.
Each set of experiments was repeated 3 times and the test results are shown in table 3.
Table 3 test results of example 3
As can be seen from Table 3, under the experimental conditions, at an ascorbic acid concentration of 0.3mol/L in the absorption solution, about 20% of the trivalent arsenic was converted into pentavalent arsenic. When the concentration of the ascorbic acid in the absorption liquid is 0.5mol/L, the content of trivalent arsenic converted into eleutherobin arsenic is only about 5%, which shows that the ascorbic acid well inhibits the trivalent arsenic from being oxidized.
The foregoing is a description of specific embodiments of the present invention, and any changes, modifications, substitutions and alterations that do not depart from the gist of the invention are intended to be within the scope of the invention.
Claims (3)
1. An absorption liquid for collecting gas-phase arsenic with different valence states is characterized in that: the absorption liquid comprises acid and an antioxidant. Wherein the acid is hydrochloric acid or oxalic acid; the antioxidant is ascorbic acid.
2. The absorption liquid for collecting gas-phase arsenic with different valence states as claimed in claim 1, wherein: the concentration of hydrochloric acid in the absorption liquid is 0.5-2 mol/L, and the concentration of oxalic acid is 0.05-0.2 mol/L.
3. The absorption liquid for collecting gas-phase arsenic with different valence states as claimed in claim 2, wherein: the concentration of the ascorbic acid is 0.1-0.5 mol/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010011953.3A CN111135674A (en) | 2020-01-07 | 2020-01-07 | Absorption liquid for collecting gas-phase arsenic with different valence states |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010011953.3A CN111135674A (en) | 2020-01-07 | 2020-01-07 | Absorption liquid for collecting gas-phase arsenic with different valence states |
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| CN111135674A true CN111135674A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010011953.3A Pending CN111135674A (en) | 2020-01-07 | 2020-01-07 | Absorption liquid for collecting gas-phase arsenic with different valence states |
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Citations (15)
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|---|---|---|---|---|
| US5330560A (en) * | 1993-03-29 | 1994-07-19 | Gas Research Institute | Supported sorbents for removal and recovery of arsenic from gases |
| JP2004181431A (en) * | 2002-12-06 | 2004-07-02 | Tsurumi Soda Co Ltd | Purification method of aqueous solution and purified aqueous solution |
| US20070170404A1 (en) * | 2006-01-20 | 2007-07-26 | No-Burn Investments, Llc | Fire retardant with mold inhibitor and insecticide |
| DE102006050117A1 (en) * | 2006-10-25 | 2008-04-30 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Transparent shaped product made from a xerogel, useful for making jewelry, has a high refractive index and contains a colorant |
| CN101591552A (en) * | 2008-05-30 | 2009-12-02 | 北京三聚环保新材料股份有限公司 | A kind of preparation method of normal temperature composite desulfurating and dearsenic agent |
| CN101641427A (en) * | 2006-12-28 | 2010-02-03 | 莫利康普矿物有限责任公司 | Remove the method and apparatus of arsenic from arsenic material |
| CN101650350A (en) * | 2009-09-14 | 2010-02-17 | 华北电力大学（保定） | Instrument coupled speciation measuring method of gaseous arsenic compound |
| US20110172085A1 (en) * | 2008-05-30 | 2011-07-14 | Süd-Chemie AG | Nanocrystalline copper oxide, and method for the production thereof |
| CN104502467A (en) * | 2014-11-20 | 2015-04-08 | 华中科技大学 | Determination method of arsenic valence |
| CN105136765A (en) * | 2015-09-24 | 2015-12-09 | 神华集团有限责任公司 | Method of determining content of arsenic element in coal-containing sample |
| CN105648226A (en) * | 2014-11-15 | 2016-06-08 | 中国科学院过程工程研究所 | Method for separating antimony from arsenic in antimony-arsenic soot |
| CN106148705A (en) * | 2016-07-20 | 2016-11-23 | 长沙华时捷环保科技发展股份有限公司 | The method going arsenic removal from acidic arsenic-containing solution |
| CN106404769A (en) * | 2016-08-31 | 2017-02-15 | 新奥生态环境治理有限公司 | Rapid detecting device of heavy metal arsenic |
| CN107860851A (en) * | 2017-11-06 | 2018-03-30 | 山东省计量科学研究院 | A kind of standard substance for trivalent arsenic Elemental Speciation Analysis and preparation method thereof |
| CN109913659A (en) * | 2019-02-27 | 2019-06-21 | 郴州钖涛环保科技有限公司 | A kind of method of antimony smelting arsenic alkali slag and flue gas during smelting comprehensive treatment |
-
2020
- 2020-01-07 CN CN202010011953.3A patent/CN111135674A/en active Pending
Patent Citations (15)
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| US5330560A (en) * | 1993-03-29 | 1994-07-19 | Gas Research Institute | Supported sorbents for removal and recovery of arsenic from gases |
| JP2004181431A (en) * | 2002-12-06 | 2004-07-02 | Tsurumi Soda Co Ltd | Purification method of aqueous solution and purified aqueous solution |
| US20070170404A1 (en) * | 2006-01-20 | 2007-07-26 | No-Burn Investments, Llc | Fire retardant with mold inhibitor and insecticide |
| DE102006050117A1 (en) * | 2006-10-25 | 2008-04-30 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Transparent shaped product made from a xerogel, useful for making jewelry, has a high refractive index and contains a colorant |
| CN101641427A (en) * | 2006-12-28 | 2010-02-03 | 莫利康普矿物有限责任公司 | Remove the method and apparatus of arsenic from arsenic material |
| US20110172085A1 (en) * | 2008-05-30 | 2011-07-14 | Süd-Chemie AG | Nanocrystalline copper oxide, and method for the production thereof |
| CN101591552A (en) * | 2008-05-30 | 2009-12-02 | 北京三聚环保新材料股份有限公司 | A kind of preparation method of normal temperature composite desulfurating and dearsenic agent |
| CN101650350A (en) * | 2009-09-14 | 2010-02-17 | 华北电力大学（保定） | Instrument coupled speciation measuring method of gaseous arsenic compound |
| CN105648226A (en) * | 2014-11-15 | 2016-06-08 | 中国科学院过程工程研究所 | Method for separating antimony from arsenic in antimony-arsenic soot |
| CN104502467A (en) * | 2014-11-20 | 2015-04-08 | 华中科技大学 | Determination method of arsenic valence |
| CN105136765A (en) * | 2015-09-24 | 2015-12-09 | 神华集团有限责任公司 | Method of determining content of arsenic element in coal-containing sample |
| CN106148705A (en) * | 2016-07-20 | 2016-11-23 | 长沙华时捷环保科技发展股份有限公司 | The method going arsenic removal from acidic arsenic-containing solution |
| CN106404769A (en) * | 2016-08-31 | 2017-02-15 | 新奥生态环境治理有限公司 | Rapid detecting device of heavy metal arsenic |
| CN107860851A (en) * | 2017-11-06 | 2018-03-30 | 山东省计量科学研究院 | A kind of standard substance for trivalent arsenic Elemental Speciation Analysis and preparation method thereof |
| CN109913659A (en) * | 2019-02-27 | 2019-06-21 | 郴州钖涛环保科技有限公司 | A kind of method of antimony smelting arsenic alkali slag and flue gas during smelting comprehensive treatment |
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Application publication date: 20200512 |
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