WO2021221524A4 - Composition and process for in situ treatment of acid tar and contaminated soil - Google Patents
Composition and process for in situ treatment of acid tar and contaminated soil Download PDFInfo
- Publication number
- WO2021221524A4 WO2021221524A4 PCT/RO2021/000002 RO2021000002W WO2021221524A4 WO 2021221524 A4 WO2021221524 A4 WO 2021221524A4 RO 2021000002 W RO2021000002 W RO 2021000002W WO 2021221524 A4 WO2021221524 A4 WO 2021221524A4
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tar
- composition
- acid
- acid tar
- stabilization
- Prior art date
Links
- 239000011282 acid tar Substances 0.000 title claims abstract 20
- 239000000203 mixture Substances 0.000 title claims abstract 14
- 238000000034 method Methods 0.000 title claims abstract 11
- 239000002689 soil Substances 0.000 title claims abstract 8
- 238000011065 in-situ storage Methods 0.000 title claims abstract 6
- 239000011269 tar Substances 0.000 claims abstract 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract 17
- 238000002156 mixing Methods 0.000 claims abstract 9
- 230000006641 stabilisation Effects 0.000 claims abstract 9
- 238000011105 stabilization Methods 0.000 claims abstract 9
- 230000000087 stabilizing effect Effects 0.000 claims abstract 7
- 230000002745 absorbent Effects 0.000 claims abstract 6
- 239000002250 absorbent Substances 0.000 claims abstract 6
- 239000000440 bentonite Substances 0.000 claims abstract 6
- 229910000278 bentonite Inorganic materials 0.000 claims abstract 6
- 239000000292 calcium oxide Substances 0.000 claims abstract 6
- 239000004568 cement Substances 0.000 claims abstract 6
- 239000003599 detergent Substances 0.000 claims abstract 6
- 230000001804 emulsifying effect Effects 0.000 claims abstract 6
- 239000000395 magnesium oxide Substances 0.000 claims abstract 6
- 239000004576 sand Substances 0.000 claims abstract 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract 5
- 239000000654 additive Substances 0.000 claims abstract 4
- 238000005538 encapsulation Methods 0.000 claims abstract 4
- 238000006386 neutralization reaction Methods 0.000 claims abstract 4
- 239000000126 substance Substances 0.000 claims abstract 4
- 238000009434 installation Methods 0.000 claims abstract 3
- 239000002352 surface water Substances 0.000 claims abstract 3
- 229910052751 metal Inorganic materials 0.000 claims abstract 2
- 239000002184 metal Substances 0.000 claims abstract 2
- 238000003860 storage Methods 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000004078 waterproofing Methods 0.000 claims abstract 2
- 239000004115 Sodium Silicate Substances 0.000 claims 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims 5
- 235000019795 sodium metasilicate Nutrition 0.000 claims 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims 5
- 230000001419 dependent effect Effects 0.000 claims 4
- 238000004458 analytical method Methods 0.000 claims 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims 3
- 229930195733 hydrocarbon Natural products 0.000 claims 3
- 150000002430 hydrocarbons Chemical class 0.000 claims 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims 3
- 239000003208 petroleum Substances 0.000 claims 3
- 238000011109 contamination Methods 0.000 claims 2
- 150000002894 organic compounds Chemical class 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 238000012937 correction Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 230000035515 penetration Effects 0.000 claims 1
- 231100000719 pollutant Toxicity 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 abstract 1
- 238000000265 homogenisation Methods 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
- B09B3/25—Agglomeration, binding or encapsulation of solid waste using mineral binders or matrix
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/12—Water-soluble silicates, e.g. waterglass
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/02—Working-up pitch, asphalt, bitumen by chemical means reaction
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Soil Sciences (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Civil Engineering (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a composition and process for the physical and chemical stabilization, in situ, of acid tar from tar pits and of soil contaminated with acid tar, having TPH values below 200,000 mg / kg and DOC values below 1000 mg / kg dry matter, by neutralization, solidification and stabilization processes. A process for stabilizing and encapsulating acid tar with TPH values below 200,000 mg / kg and DOC values below 1000 mg / kg dry matter, according to the invention, comprises the following steps: removal of surface water from the tar pit, which will be collected through drainage systems and sent to the treatment plant, before the stabilization procedure; delimitation of work areas, excavation of acid tar, mixing and homogenization thereof in an acid tar treatment plant connected to a gas capture station; calculation of DOC, TPH, pH and metal concentrations values to determine the correct stabilization recipe; neutralization of acid tar by in situ by mixing the acid tar and contaminated soil from the first working area with CaO (3-8%), MgO (1-2%) NaOH (1 - 10%), absorbent (1-5%) and, optionally, metasilicate (0.3 - 0.8%); encapsulation of the tar and neutralized soil, by applying emulsifying detergent (1 - 4%) bentonite (1 - 2.8%), cement (3 - 20%), sand (2 - 5%), hardening additives (1%), depending on the chemical composition of the tar; storage of stabilized tar in situ, in the tar pit prepared by waterproofing with geomembranes and installing a water drainage installation; covering / closing the site.
Claims
1. A composition for stabilization and encapsulation of acid tar with Total Petroleum Hydrocarbons (TPH) values below 200,000 mg / kg and Dissolved Organic Carbon (DOC) below 1000 mg / kg dry matter characterized in that it comprises in mass percentages:
- emulsifying detergent: 1-4%
- calcium oxide: 3-8%
- magnesium oxide 0.1-2%
- bentonite: 1-2.8%
- sand: 2-5%
- cement 3-20%
- hardening additives 1%
- absorbent 1 % - 5%
- sodium hydroxide 1% - 10%
-sodium metasilicate 0.3-0.8% the rest up to 100% being the acid tar subject to stabilization.
2. The composition for stabilizing and encapsulating acid tar according to claim 1 , characterized in that the emulsifying detergent is 1%, calcium oxide is 8%, magnesium oxide 0.1%, bentonite is 1%, sand is 2%, cement is 3%, absorbent is 1%, sodium hydroxide is 1%, sodium metasilicate 0.3%.
3. The composition for stabilizing and encapsulating acid tar according to claim 1 , characterized in that the emulsifying detergent is 3.5%, calcium oxide is 3%, magnesium oxide 0.2%, bentonite is 2%, sand is 5%, cement is 5%, absorbent is 1%, sodium hydroxide is 1%, sodium metasilicate 0.5%.
4. The composition for stabilizing and encapsulating acid tar according to claim 1 , characterized in that the emulsifying detergent is 4%, calcium oxide is 7%, magnesium oxide 0.3%, bentonite is 2.8%, sand is 3%, cement is 8%, absorbent is 1%, sodium hydroxide is 1%, sodium metasilicate 0.8 %.
5. A process for stabilizing and encapsulating acid tar with Total Petroleum Hydrocarbons (TPH) values below 200,000 mg / kg and Dissolved Organic Compound
(DOC) below 1000 mg / kg dry matter, characterized in that it comprises the following steps:
- Step 1: removal of surface water from tar pits, which is collected through drainage systems and sent to a treatment plant, before a stabilization procedure.
- Step 2: Batches are delimited within the tar pit; the acid tar in the first batch is excavated and then mixed and homogenized in an acid tar treatment plant connected to a gas capture station.
- Step 3: The value of DOC, TPH, pH and metal concentrations of the homogenized tar of the first batch is calculated, in order to determine the correct stabilization recipe.
- Step 4: A suction hood is installed at the drilling / mixing / dosing plant for absorbing and treating the emissions during the works, avoiding their release into the atmosphere.
- Step 5: Neutralization of the acid tar in situ by mixing of acid tar and soil contaminated from a first working area with CaO 3-8%, MgO 1-2% , NaOH 1 - 10%, absorbent 1 - 5% and metasilicate 0.3 - 0.8%), depending on the chemical composition of the tar, calculated by the analyses performed in the previous step; a neutralizing composition is applied over the entire depth of soil contamination by mixing up and down vertically, for several times, in the mixing tanks, also for homogenizing the resulting composition both vertically and horizontally.
- Step 6: Encapsulation of the tar and contaminated soil from the first work area, neutralized in the previous step; for encapsulation, emulsifying detergent 1-4%, bentonite 1 - 2.8%, cement 3 - 20%, sand 2 - 5%, hardening additives 1% are applied, depending on the chemical composition of the tar calculated by the analyses performed in the previous step; the composition having the role of neutralization is applied over the entire depth of soil contamination by mixing up and down vertically, for several times, in the mixing tanks, also for homogenizing the resulting composition both vertically and horizontally.
- Step 7: Storage of tar stabilized in situ, in the initial tar pit, prepared by waterproofing with geomembranes and by installing of a water drainage installation.
- Step 8: Covering / closing the site, can begin and unfold sequentially, with the stabilization of a work area and the creation of another by moving sheet piles, thus systematically reducing the areas in tar pit exposed to surface water penetration and rainfall;
- After treating the tar in the first work area, the procedure is repeated one at a time for the tar in each of the following work areas;
- The drainage installation is installed for the collection of rainwater in some tanks, for its analysis and treatment, in case pollutant concentration above the maximum allowed values occurs.
6. The process for stabilizing and encapsulating acid tar according to claim 5, characterized in that, said sheet piles are mounted to create a first, second and third working areas isolated from the rest of the tar pit, when the tar has a non- homogeneous composition, the work areas being created successively from the outside to the inside of the tar pit.
7. The process for stabilizing and encapsulating acid tar according to claim 5, characterized in that said sheet piles are used for sectioning the tar pit when the tar mass is developed as a compact block, followed by emptying two volumes of the tar pit, one being used for crushing and mixing in the additives, and the other for resetting the stabilized and encapsulated material.
STATEMENT UNDER ARTICLE 19 (1 )
Amendments to the claims of PCT/R02021/000002 were brought such that to overcome the objections of the examiner in the written opinion of the International Search Report.
The claims, originaly filed, were amended as follows:
• Claims 1, 3, 5, and 7 and 9 were amended;
• Claims 2, 4, 6 and 8 were deleted;
• Claims 10 -11 were unchanged.
New claim 1 is based on the combination of original claims 1 and 2.
Claim 1 was amended introducing the metasilicate de sodium 0.3-0.8 %, component disclosed in the dependent Claim 2 originally filed.
The new dependent Claims 2, 3 and 4 are based on the dependent Claims 3, 5, and 7, originally filed, and further incorporates the component sodium metasilicate in the percent shown respectively in the dependent Claims 4, 6 and 8, originally filed.
The new independent claim 5 -Step 5 was amended deleting the expression “optionally” associated with the sodium metasilicate in order to comply with the new independent Claim 1.
The new independent claims 1 and 5 were amended by adding the definition for the acronyms THP and DOC., i.e. Total Petroleum Hydrocarbons and Dissolved Organic Compound.
Furthermore, some English grammar corrections were made in order to clearly express the meaning of the steps or technical means defining the claimed process.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ROA202000217 | 2020-04-27 | ||
| RO202000217A RO134684B1 (en) | 2020-04-27 | 2020-04-27 | Composition and process for stabilizing and encapsulating acid tar and contaminated soil in situ |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2021221524A1 WO2021221524A1 (en) | 2021-11-04 |
| WO2021221524A4 true WO2021221524A4 (en) | 2021-12-02 |
Family
ID=74222376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RO2021/000002 WO2021221524A1 (en) | 2020-04-27 | 2021-04-27 | Composition and process for in situ treatment of acid tar and contaminated soil |
Country Status (2)
| Country | Link |
|---|---|
| RO (1) | RO134684B1 (en) |
| WO (1) | WO2021221524A1 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RO123548B1 (en) * | 2008-02-21 | 2013-07-30 | Ecomaster Servicii Ecologice S.R.L. | Process and apparatus for treating acid petroleum wastes stored in catch pits |
-
2020
- 2020-04-27 RO RO202000217A patent/RO134684B1/en unknown
-
2021
- 2021-04-27 WO PCT/RO2021/000002 patent/WO2021221524A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| RO134684A3 (en) | 2021-04-29 |
| RO134684A0 (en) | 2021-01-29 |
| WO2021221524A1 (en) | 2021-11-04 |
| RO134684B1 (en) | 2021-12-30 |
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