CN113060791A - Method for treating high-arsenic waste acid by using modified coal slag adsorbent - Google Patents
Method for treating high-arsenic waste acid by using modified coal slag adsorbent Download PDFInfo
- Publication number
- CN113060791A CN113060791A CN202110358024.4A CN202110358024A CN113060791A CN 113060791 A CN113060791 A CN 113060791A CN 202110358024 A CN202110358024 A CN 202110358024A CN 113060791 A CN113060791 A CN 113060791A
- Authority
- CN
- China
- Prior art keywords
- arsenic
- modified coal
- coal slag
- waste acid
- solution
- Prior art date
- 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.)
- Pending
Links
- 229910052785 arsenic Inorganic materials 0.000 title claims abstract description 110
- 239000002893 slag Substances 0.000 title claims abstract description 65
- 239000003245 coal Substances 0.000 title claims abstract description 53
- 239000002253 acid Substances 0.000 title claims abstract description 42
- 239000002699 waste material Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000003463 adsorbent Substances 0.000 title claims abstract description 22
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 71
- 239000000843 powder Substances 0.000 claims abstract description 36
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 30
- 239000004484 Briquette Substances 0.000 claims abstract description 20
- 239000000706 filtrate Substances 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000008367 deionised water Substances 0.000 claims abstract description 6
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000010355 oscillation Effects 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 5
- 239000003818 cinder Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 6
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 150000002500 ions Chemical class 0.000 abstract description 3
- 239000002244 precipitate Substances 0.000 description 12
- 238000009616 inductively coupled plasma Methods 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- -1 arsenic ions Chemical class 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 229910001581 alarsite Inorganic materials 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000007865 diluting Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000001698 pyrogenic effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000004626 scanning electron microscopy Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 206010058467 Lung neoplasm malignant Diseases 0.000 description 1
- 208000007443 Neurasthenia Diseases 0.000 description 1
- 206010036105 Polyneuropathy Diseases 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 208000000453 Skin Neoplasms Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- CBIFDJDRCNEMQB-UHFFFAOYSA-N [Al].O[As](O)(O)=O Chemical compound [Al].O[As](O)(O)=O CBIFDJDRCNEMQB-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 206010003549 asthenia Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 201000005202 lung cancer Diseases 0.000 description 1
- 208000020816 lung neoplasm Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 210000004877 mucosa Anatomy 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 230000007824 polyneuropathy Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 201000000849 skin cancer Diseases 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a method for treating high-arsenic waste acid by using a modified coal slag adsorbent, and belongs to the technical field of heavy metal pollution treatment. The invention relates to a method for preparing a compound H2O2Adding the solution into high-arsenic waste acid, and reacting for 4-5 hours at the temperature of 80-82 ℃ under the stirring condition to obtain a solution A; adding honeycomb briquette powder and NaOH into deionized water to obtain a solution B, stirring and reacting for 2-3 h at the temperature of 25 ℃, performing solid-liquid separation to obtain modified coal slag and filtrate, and drying the modified coal slag for 12 h; the invention utilizes the modified coal cinder powder to realize the removal of arsenic in high-arsenic waste acid and overcome the interference of various ions in the solutionThe arsenic removal effect is achieved, the early-stage investment cost is reduced, and the secondary pollution is avoided.
Description
Technical Field
The invention relates to a method for treating high-arsenic waste acid by using a modified coal slag adsorbent, and belongs to the technical field of heavy metal pollution treatment.
Background
Arsenic can form high-toxicity compounds, can be absorbed by human bodies from respiratory tracts, skins and digestive tracts, can cause neurasthenia syndrome, polyneuropathy, skin mucosa pathological changes and the like, and inorganic compounds of arsenic can cause lung cancer and skin cancer. After arsenic-containing wastewater is treated, most harmful substances such as arsenic are transferred into sludge, so that the method has important practical significance for safe treatment and disposal research of the arsenic-containing sludge.
At present, various methods such as wet treatment, pyrogenic treatment, solidification treatment and the like are used for treating arsenic-containing sludge. The wet treatment has low energy consumption, low pollution and high efficiency, but the operation steps are complicated; the pyrogenic process has simple treatment process and stable production, but has high efficiency, but can generate secondary pollution. The most commonly used method for arsenic-containing sludge is solidification. The portland cement method is often adopted in the curing method, but the method has higher cost and is not beneficial to large-scale use of enterprises.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for treating high-arsenic contaminated acid by using a modified coal cinder adsorbent, which utilizes modified coal cinder powder to remove arsenic in the high-arsenic contaminated acid and overcome the interference of various ions in a solution to achieve the arsenic removal effect, reduces the early-stage investment cost and avoids secondary pollution, and comprises the following specific steps:
(1) h is to be2O2Adding the solution into high-arsenic waste acid, and reacting for 4-5 hours at the temperature of 80-82 ℃ under the stirring condition to obtain a solution A;
(2) adding honeycomb briquette slag powder and NaOH into deionized water to obtain a solution B, stirring and reacting for 2-3 h, carrying out solid-liquid separation to obtain modified coal slag and filtrate, and drying the modified coal slag to obtain modified coal slag powder;
(3) adding the modified coal slag powder prepared in the step (2) into the solution A obtained in the step (1), carrying out oscillation reaction for 10-24 h, carrying out solid-liquid separation to obtain an arsenic-containing solid and a filtrate, drying the arsenic-containing solid, then stacking, and carrying out deep arsenic removal treatment on the filtrate.
Preferably, step (1) H of the present invention2O2The mass percent concentration of the solution is 30 percent, H2O2The volume ratio of the solution to the high-arsenic waste acid is 1: 4-6, and the concentration of arsenic in the high-arsenic waste acid is 3000.0-7000.0 mg/L.
Preferably, the particle size of the honeycomb briquette slag powder in the step (2) is 200-300 meshes.
Preferably, the addition amount of the honeycomb briquette slag powder in the solution B in the step (2) of the invention is 0.1-0.2 g/ml, the mass percentage concentration of NaOH is 96%, and the addition amount of NaOH is as follows: 0.01-0.03 g/ml.
Preferably, the drying time in step (2) of the present invention is not 12 hours.
Preferably, the solid-to-liquid ratio g: mL of the modified coal slag powder to the solution A in the step (3) is (12-24): 100.
Preferably, the temperature of the shaking reaction in step (3) of the present invention is 25 ℃.
The principle of treating high-arsenic contaminated acid by using the modified coal slag adsorbent is as follows: during the process of adding the modified coal cinder powder into the oxidized waste acid, Al and As in the honeycomb briquette cinder powder are subjected to arsenic precipitation reaction, and precipitates contain AlAsO4·2H2O and other alkali metal elements in the honeycomb briquette slag powder form a complex precipitate, so that the precipitate has a compact structure and high crystallinity, arsenic ions are locked in the complex precipitate, the arsenic migration capacity and leaching toxicity are reduced, and the effect of stabilizing harmful pollutants is achieved.
The invention has the beneficial effects that:
(1) according to the invention, the modified coal cinder powder is used for removing arsenic in high-arsenic waste acid and overcoming the interference of various ions in the solution to achieve the arsenic removal effect, so that the early-stage investment cost is reduced, and secondary pollution is avoided; and the purpose of treating wastes with processes of wastes against one another is realized.
(2) The invention utilizes the morphological characteristics of high content of alkaline compounds and large aperture in the coal slag powder, and contains AlAsO4·2H2The precipitate of O and other alkali metal elements in the honeycomb briquette slag powder form a complex precipitate, so that the precipitate has a compact structure, arsenic ions are locked in the complex precipitate, and the stability of an arsenic-containing compound is enhanced.
(3) The method of the invention uses honeycomb briquette slag to remove arsenic, thereby greatly reducing the concentration of arsenic ions containing arsenic contaminated acid, and the cinder after alkali modification can also greatly reduce the acidity of wastewater, thereby having better treatment significance for next discharge.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the scope of the present invention is not limited to the description.
In the embodiment of the invention, the waste acid is from a certain smelting plant in southwest of China, the waste water obtained by washing water in the process of preparing acid from flue gas has strong acidity, metal elements, nonmetal elements and heavy metal elements in the flue gas are accumulated into the waste acid continuously, the waste acid contains various metal elements such As Cu, Zn, Al and the like, the nonmetal elements such As Cl, F, S, C and the like, the heavy metal elements such As As, Pb, Cd and the like, arsenic is the heavy metal element with the highest content in the waste acid, the content of the elements in the waste acid is shown in table 1 through ICP element detection, the components of honeycomb briquette slag powder are shown in table 2, and the most content of the honeycomb briquette slag is SiO2And 27.52% Al2O3And 10.97% CaO;
TABLE 1 contaminated acid composition (mg. L)-1)
TABLE 2 composition of Honeycomb briquet slag
Example 1
A method for treating high-arsenic waste acid by using a modified coal slag adsorbent comprises the following specific steps:
(1) h is to be2O2Adding the solution into high-arsenic waste acid, and reacting for 4 hours at the temperature of 80 ℃ and the stirring speed of 180r/min to obtain solution A; wherein H2O2Concentration of the solution was 30%, H2O2The volume ratio of the solution to the high-arsenic waste acid is 1: 4-6;
(2) adding 50g of honeycomb briquette slag powder and 10g of NaOH into 500ml of deionized water to obtain a solution B, stirring and reacting at 25 ℃ for 2-3 h, carrying out solid-liquid separation to obtain modified coal slag and filtrate, and drying the modified coal slag for 12 h.
(3) Adding the prepared modified coal slag powder into 50ml of the solution A obtained in the step (1), oscillating for 24h in a constant temperature oscillator at the temperature of 25 ℃ at an oscillation speed of 180r/min, carrying out solid-liquid separation to obtain an arsenic-containing solid and a filtrate, drying the arsenic-containing solid, then stacking, and carrying out deep arsenic removal treatment on the filtrate. Diluting the filtrate, measuring the residual arsenic concentration by ICP, drying the arsenic-containing solid at 60 ℃ for 12h, and carrying out SEM and EDS analysis; the particle size of the honeycomb briquette slag powder is 200-300 meshes, and the adding amount of the modified briquette slag powder is 2g, 4g, 6g, 8g, 10g and 12g in sequence.
TABLE 3 arsenic content and arsenic removal rate of the remaining solution under different use amounts of the modified coal slag powder
As can be seen from Table 3, the arsenic content in the solution decreases with the increase of the charging amount of the modified cinder, the arsenic removal rate gradually increases, and the rising trend of the arsenic removal rate gradually decreases with the increase of the charging amount of the honeycomb cinder, particularly, the arsenic content of the residual solution and the arsenic removal rate do not change greatly when the charging amount of the honeycomb cinder is between 8g and 10g, the arsenic content of the residual solution is 348.6mg/L and the arsenic removal rate reaches 94.19% (the arsenic content in the raw solution is 6g/L), and the arsenic content of the residual solution is 140.3mg/L and the arsenic removal rate reaches 97.66% when the charging amount of the honeycomb cinder is 10 g.
Example 2
A method for treating high-arsenic waste acid by using a modified coal slag adsorbent comprises the following specific steps:
(1) h is to be2O2Adding the solution into high-arsenic waste acid, and reacting for 4.5 hours at the temperature of 81 ℃ and the stirring speed of 180r/min to obtain solution A; wherein the concentration of the hydrogen peroxide solution is 30 percent, and the volume ratio of the hydrogen peroxide solution to the high-arsenic contaminated acid is 1: 5;
(2) adding 50g of honeycomb briquette slag powder and 10g of NaOH into 500ml of deionized water to obtain a solution B, stirring and reacting at 25 ℃ for 2-3 h, carrying out solid-liquid separation to obtain modified coal slag and filtrate, and drying the modified coal slag for 12 h.
(3) Adding 8g of prepared modified coal slag powder into 50ml of solution A in the step (1), carrying out oscillation reaction in a constant-temperature oscillator at the temperature of 25 ℃ at an oscillation speed of 180r/min, carrying out solid-liquid separation to obtain an arsenic-containing solid and a filtrate, drying the arsenic-containing solid, stacking the arsenic-containing solid, and carrying out deep arsenic removal treatment on the filtrate; diluting the filtrate, measuring the residual arsenic concentration by ICP, drying the arsenic-containing solid at 60 ℃ for 12h, and carrying out SEM and EDS analysis; the particle size of the modified coal slag powder is 200-300 meshes, and the oscillation reaction time is 2 hours, 4 hours, 6 hours, 12 hours, 18 hours and 24 hours in sequence.
TABLE 4 arsenic content and arsenic removal rate of the remaining solution at different reaction times
As can be seen from Table 4, the arsenic content of the remaining solution gradually decreased with the increase of the reaction time, the arsenic removal rate gradually increased, and when the reaction time was less than 12 hours, the rising amplitude was large, the curve was shaken straight, and when the reaction time was more than 12 hours, the curve rose more smoothly, because the modified coal slag mainly achieved the removal of arsenic by adsorption in a short time, and as the time increased, the formation of aluminum arsenate by chemical reaction was more stable, the removal rate curve was relatively smooth; at 12h, the arsenic content of the residual solution is 561.3mg/L, the arsenic removal rate is 90.65%, and at 24h, the arsenic content of the residual solution is 348.6mg/L, and the arsenic removal rate reaches 94.19%.
Example 3
A method for treating high-arsenic waste acid by using a modified coal slag adsorbent comprises the following specific steps:
(1) h is to be2O2Adding the solution into high-arsenic waste acid, and reacting for 5 hours at the temperature of 82 ℃ and the stirring speed of 180r/min to obtain solution A; wherein H2O2Concentration of the solution was 30%, H2O2The volume ratio of the solution to the high-arsenic contaminated acid is 1: 6;
(2) adding 50g of honeycomb briquette slag powder and 10g of NaOH into 500ml of deionized water to obtain a solution B, stirring and reacting at 25 ℃ for 2-3 h, carrying out solid-liquid separation to obtain modified coal slag and filtrate, and drying the modified coal slag for 12 h.
(3) Adding 8g of modified coal slag powder into 50mL of the solution A obtained in the step (1), carrying out oscillation reaction for 24h at an oscillation speed of 180r/min in a constant-temperature oscillator at the temperature of 25 ℃, 40 ℃, 60 ℃, 80 ℃ and 90 ℃, carrying out solid-liquid separation to obtain an arsenic-containing solid and a filtrate, carrying out deep arsenic removal treatment on the filtrate, diluting the filtrate, measuring the concentration of residual arsenic by using ICP (inductively coupled plasma), drying the arsenic-containing solid at the temperature of 60 ℃ for 12h, and carrying out SEM (scanning electron microscope) and EDS (electronic discharge spectroscopy) analysis; wherein the particle size of the modified coal slag powder is 200-300 meshes.
TABLE 5 arsenic content and arsenic removal rate of the remaining solution at different temperature values
As can be seen from Table 5, the arsenic content of the residual solution containing arsenic content of the residual solution has no obvious change along with the rise of the temperature, the removal rate is 94-95%, the fluctuation range of the removal rate along with the change of the temperature is small, the arsenic removal effect is the best when the temperature is 25 ℃ on the premise of considering the experimental cost, the removal rate reaches 94.19%, and the arsenic content of the residual solution is 348.6 mg/L;
during the process of adding the modified coal cinder powder into the oxidized waste acid, Al and As in the honeycomb briquette cinder powder are subjected to arsenic precipitation reaction, and precipitates contain AlAsO4·2H2O and other alkali metal elements in the honeycomb briquette slag powder form a complex precipitate, so that the precipitate has a compact structure and high crystallinity, arsenic ions are locked in the complex precipitate, the arsenic migration capacity and leaching toxicity are reduced, and the effect of stabilizing harmful pollutants is achieved.
Claims (7)
1. A method for treating high-arsenic waste acid by using a modified coal slag adsorbent is characterized by comprising the following specific steps:
(1) h is to be2O2Adding the solution into high-arsenic waste acid, and reacting for 4-5 hours at the temperature of 80-82 ℃ under the stirring condition to obtain a solution A;
(2) adding honeycomb briquette slag powder and NaOH into deionized water to obtain a solution B, stirring and reacting for 2-3 h, carrying out solid-liquid separation to obtain modified coal slag and filtrate, and drying the modified coal slag to obtain modified coal slag powder;
(3) adding the modified coal slag powder prepared in the step (2) into the solution A obtained in the step (1), carrying out oscillation reaction for 10-24 h, carrying out solid-liquid separation to obtain an arsenic-containing solid and a filtrate, drying the arsenic-containing solid, then stacking, and carrying out deep arsenic removal treatment on the filtrate.
2. The method for treating high-arsenic waste acid by using the modified coal slag adsorbent as claimed in claim 1, wherein the modified coal slag adsorbent comprises the following steps: step (1) H2O2The mass percent concentration of the solution is 30 percent, H2O2The volume ratio of the solution to the high-arsenic waste acid is 1: 4-6, and the concentration of arsenic in the high-arsenic waste acid is 3000.0-7000.0 mg/L.
3. The method for treating high-arsenic waste acid by using the modified coal slag adsorbent as claimed in claim 1, wherein the modified coal slag adsorbent comprises the following steps: the particle size of the honeycomb briquette slag powder in the step (2) is 200-300 meshes.
4. The method for treating high-arsenic waste acid by using the modified coal slag adsorbent as claimed in claim 1, wherein the modified coal slag adsorbent comprises the following steps: the addition amount of the honeycomb briquette slag powder in the solution B in the step (2) is 0.1-0.2 g/ml, the mass percentage concentration of NaOH is 96%, and the addition amount of NaOH is as follows: 0.01-0.03 g/ml.
5. The method for treating high-arsenic waste acid by using the modified coal slag adsorbent as claimed in claim 1, wherein the modified coal slag adsorbent comprises the following steps: the drying time in the step (2) is 12 h.
6. The method for treating high-arsenic waste acid by using the modified coal slag adsorbent as claimed in claim 1, wherein the modified coal slag adsorbent comprises the following steps: in the step (3), the solid-to-liquid ratio g/mL of the modified coal slag powder to the solution A is (12-24): 100.
7. The method for treating high-arsenic waste acid by using the modified coal slag adsorbent as claimed in claim 1, wherein the modified coal slag adsorbent comprises the following steps: the temperature of the shaking reaction in the step (3) was 25 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110358024.4A CN113060791A (en) | 2021-04-01 | 2021-04-01 | Method for treating high-arsenic waste acid by using modified coal slag adsorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110358024.4A CN113060791A (en) | 2021-04-01 | 2021-04-01 | Method for treating high-arsenic waste acid by using modified coal slag adsorbent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113060791A true CN113060791A (en) | 2021-07-02 |
Family
ID=76565481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110358024.4A Pending CN113060791A (en) | 2021-04-01 | 2021-04-01 | Method for treating high-arsenic waste acid by using modified coal slag adsorbent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113060791A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115572139A (en) * | 2022-09-29 | 2023-01-06 | 英德市瑞大新材料有限公司 | Light coal cinder low-carbon heat-preservation full-function exterior wall coating |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035623A (en) * | 1989-03-02 | 1989-09-20 | 周天保 | Produce the method for composite flocculation agent with the cinder powder |
| US5169534A (en) * | 1991-08-28 | 1992-12-08 | Trw Inc. | Metal ion and organic contaminant disposal |
| CN101791534A (en) * | 2010-04-14 | 2010-08-04 | 西南大学 | Phosphorus-removing adsorbent and preparation method thereof |
| CN104084120A (en) * | 2014-07-26 | 2014-10-08 | 青岛博睿林新材料有限公司 | Industrial waste-modified ammonia scavenger |
| US20150144029A1 (en) * | 2013-09-06 | 2015-05-28 | Wuji Yin | Bentonite modifier, modified bentonite, and use thereof |
| CN105664892A (en) * | 2016-01-20 | 2016-06-15 | 昆明理工大学 | Method for preparing arsenic adsorbing material by lignite and yellow phosphorus water-quenched slag |
| CN108483551A (en) * | 2018-04-26 | 2018-09-04 | 昆明理工大学 | The minimizing technology of arsenic in a kind of waste acid containing arsenic |
| CN108636343A (en) * | 2018-05-21 | 2018-10-12 | 天津城建大学 | A kind of reinforcing absorption clinker and preparation method thereof and purposes |
| CN109574319A (en) * | 2019-01-07 | 2019-04-05 | 紫金矿业集团股份有限公司 | The solid arsenic technique of the high arsenic waste acid of non-ferrous metal metallurgy |
| CN111346606A (en) * | 2018-12-21 | 2020-06-30 | 光合强化（北京）生物科技有限公司 | Process for preparing arsenic adsorbent from coal slag |
| CN111792918A (en) * | 2020-07-28 | 2020-10-20 | 贵州中建建筑科研设计院有限公司 | Preparation method and application of modified coal cinder |
| CN111807630A (en) * | 2020-07-17 | 2020-10-23 | 安徽工业大学 | High-efficient molybdenum-removing vertical subsurface flow constructed wetland purification device |
| CN111925016A (en) * | 2020-08-17 | 2020-11-13 | 昆明理工大学 | Method for treating high-arsenic waste acid by using honeycomb briquette slag |
-
2021
- 2021-04-01 CN CN202110358024.4A patent/CN113060791A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035623A (en) * | 1989-03-02 | 1989-09-20 | 周天保 | Produce the method for composite flocculation agent with the cinder powder |
| US5169534A (en) * | 1991-08-28 | 1992-12-08 | Trw Inc. | Metal ion and organic contaminant disposal |
| CN101791534A (en) * | 2010-04-14 | 2010-08-04 | 西南大学 | Phosphorus-removing adsorbent and preparation method thereof |
| US20150144029A1 (en) * | 2013-09-06 | 2015-05-28 | Wuji Yin | Bentonite modifier, modified bentonite, and use thereof |
| CN104084120A (en) * | 2014-07-26 | 2014-10-08 | 青岛博睿林新材料有限公司 | Industrial waste-modified ammonia scavenger |
| CN105664892A (en) * | 2016-01-20 | 2016-06-15 | 昆明理工大学 | Method for preparing arsenic adsorbing material by lignite and yellow phosphorus water-quenched slag |
| CN108483551A (en) * | 2018-04-26 | 2018-09-04 | 昆明理工大学 | The minimizing technology of arsenic in a kind of waste acid containing arsenic |
| CN108636343A (en) * | 2018-05-21 | 2018-10-12 | 天津城建大学 | A kind of reinforcing absorption clinker and preparation method thereof and purposes |
| CN111346606A (en) * | 2018-12-21 | 2020-06-30 | 光合强化（北京）生物科技有限公司 | Process for preparing arsenic adsorbent from coal slag |
| CN109574319A (en) * | 2019-01-07 | 2019-04-05 | 紫金矿业集团股份有限公司 | The solid arsenic technique of the high arsenic waste acid of non-ferrous metal metallurgy |
| CN111807630A (en) * | 2020-07-17 | 2020-10-23 | 安徽工业大学 | High-efficient molybdenum-removing vertical subsurface flow constructed wetland purification device |
| CN111792918A (en) * | 2020-07-28 | 2020-10-20 | 贵州中建建筑科研设计院有限公司 | Preparation method and application of modified coal cinder |
| CN111925016A (en) * | 2020-08-17 | 2020-11-13 | 昆明理工大学 | Method for treating high-arsenic waste acid by using honeycomb briquette slag |
Non-Patent Citations (2)
| Title |
|---|
| TIANTIAN SHENG等: "Development, characterization and evaluation of iron-coated honeycomb briquette cinders for the removal of As(V) from aqueous solutions", 《ARABIAN JOURNAL OF CHEMISTRY》 * |
| 祁先进等: "钢渣改性对污酸除砷的影响", 《中国有色金属学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115572139A (en) * | 2022-09-29 | 2023-01-06 | 英德市瑞大新材料有限公司 | Light coal cinder low-carbon heat-preservation full-function exterior wall coating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105271436B (en) | The method that poly ferric chloride flocculant agent is prepared using steel wire rope sludge and waste hydrochloric acid | |
| CN109987639B (en) | Method for dealkalizing aluminum-reinforced red mud and separating and recovering aluminum and iron | |
| CN111389363B (en) | Magnetic biochar adsorbing material based on sulfate-reduced sludge and preparation method and application thereof | |
| CN102872803B (en) | Aluminum modified straw biomass charcoal as well as preparation method and application thereof on removing arsenic in water body | |
| CN109012565A (en) | A kind of method of the magnetic carbon material Adsorption heavy metal ions in wastewater of nitrating | |
| CN106947864B (en) | A kind of system and its processing method recycling heavy metal from discarded SCR catalyst | |
| CN101804330A (en) | Heavy metal ion adsorbent and preparation and application method thereof | |
| CN111925016B (en) | Method for treating high-arsenic waste acid by using honeycomb briquette slag | |
| CN112340830B (en) | Application of catalyst taking waste adsorbent after adsorption-desorption as raw material in treating high-salt organic wastewater by activating persulfate | |
| CN111925017B (en) | Method for treating high-arsenic contaminated acid by using zinc slag | |
| CN111871370A (en) | Preparation method of C-O-Fe biochar aiming at soil heavy metal passivation | |
| CN112452298A (en) | Magnetic biochar composite material and preparation method and application thereof | |
| CN114452936B (en) | Preparation method and application of Fenton sludge-based magnetic adsorbent | |
| CN113060791A (en) | Method for treating high-arsenic waste acid by using modified coal slag adsorbent | |
| CN110075697B (en) | Flue gas desulfurization and resource utilization method based on electrolytic manganese tailing slag | |
| CN115722251B (en) | Preparation method and application of heteroatom doped algae-based biochar loaded nano zero-valent metal catalyst | |
| CN110975811A (en) | Method for preparing adsorbent by using high-alumina fly ash and application | |
| CN103215453B (en) | Method for treating waste residue by using arsenious wastewater in clean mode | |
| CN113562830B (en) | Preparation method of copper smelting waste acid arsenic precipitating agent | |
| CN113023823A (en) | Preparation method of composite material for purifying arsenic-containing heavy metal solution | |
| CN114737059A (en) | Method for treating cyaniding tailings by adopting oxygen-free roasting-persulfate leaching combined technology | |
| CN114082767A (en) | Method for promoting chlorination volatilization of heavy metals in fly ash generated by burning household garbage | |
| CN108993387A (en) | A kind of method of contents of many kinds of heavy metal ion in the carbon-based magnetic material Adsorption waste water of fluorine doped | |
| CN113105012A (en) | Treatment device and method for desulfurization and decyanation waste liquid in coal chemical industry | |
| CN113548755A (en) | Method for purifying arsenic-containing wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210702 |