CN106311730A - Method for remediating soil organically polluted by chlorobenzene based on enhanced adsorption and fixation by surfactant - Google Patents
Method for remediating soil organically polluted by chlorobenzene based on enhanced adsorption and fixation by surfactant Download PDFInfo
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- CN106311730A CN106311730A CN201610726429.8A CN201610726429A CN106311730A CN 106311730 A CN106311730 A CN 106311730A CN 201610726429 A CN201610726429 A CN 201610726429A CN 106311730 A CN106311730 A CN 106311730A
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- tea seed
- soil
- surfactant
- seed cake
- fixation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention relates to a method for remediating soil organically polluted by chlorobenzene based on enhanced adsorption and fixation by a surfactant, and belongs to the field of soil pollution abatement. The method comprises the following steps: extracting a natural biodegradable biological surfactant saponin from tea-seed cakes through such procedures as extraction and degreasing, methanol extraction, as well as concentration and drying; compounding the extracted surfactant with zeolite, and then adding the obtained compound into the to-be-treated soil; and after watering and mixing, carrying out standing for adsorption and fixation. The method provided by the invention has the advantages that the adsorption and fixation functions of zeolite can be enhanced by utilizing the emulsification and desorption functions of the surfactant; the operation is simple and convenient and the remediation efficiency is high; and the large-scale popularization and utilization can be achieved.
Description
Technical field
The surfactant that the present invention relates to soil organic contamination chlorobenzene strengthens the restorative procedure that absorption is fixing, belongs to soil
Pollution control field.
Background technology
Organic pollution is easily adsorbed by the solid phase of soil particularly soil organism after entering soil, bioavailability
The lowest, degradable surfactant can be passed through emulsifying, be desorbed and regulate between microbial cell surface, pollutant and surrounding medium
The bioavailability of the organic pollution such as interface interaction, thus strengthen the biological restoration effect of organic polluted soil.Surface
Organic substance I from king's earth solid phase is transferred to flow mutually can be improved organic bioavailability by activating agent so that it is be easier to
It is biodegradable, thus reaches the purpose of removal organic polluter I.But some surfactant can not by complete biodegradable,
Environment can be caused potential threat by the most long-term use.Therefore, safe and efficient degradable surfactant potentiation is selected
Organic pollution in eluting ± earth can strengthen the removal effect of pollutant in king's earth by W, reduces only earth ecological risk, ensures only earth
Ecological safety.
Tea seed cake is Semen Camelliae remaining residue after oil expression, and the tea saponin contained, tea saponin is good nonionic table
Face activating agent, can being used in the industries such as agricultural protection, medicine, daily use chemicals, construction material and food, extracting if making full use of
Tea saponin and reasonable development, will produce the biggest Social benefit and economic benefit.
Summary of the invention
The technical problem that present invention mainly solves: repair chlorobenzene contaminated soil for the fixation of tradition absorption at present, repair
Efficiency is low, and required repairing efficiency is long, the defect that operation is complicated, it is provided that the surfactant of soil organic contamination chlorobenzene strengthens to be inhaled
Attached fixing restorative procedure.The steps such as the method is extracted by extraction defat, methanol, concentrate drying are extracted from tea seed cake and are obtained
The biosurfactant saponin of natural degradable, joins in pending soil after compounding to itself and zeolite, watering mixing
Rear standing adsorption solidifies.The soil remediation method of the present invention utilizes the emulsifying of surfactant, desorption to strengthen boiling
The absorption fixation of stone, easy and simple to handle, remediation efficiency is high, can use with large-scale promotion.
In order to solve above-mentioned technical problem, the technical solution adopted in the present invention is:
(1) weigh 400～500g tea seed cakes to put into corundum mortar grinds and cross 100 mesh standard sieves after 1～2h, zeolite granular
With above-mentioned prepared natural surfactant saponin mix homogeneously obtain strengthen absorption fixative, then by addition content be 10～
15% by absorption enhancing fixative joins in chlorobenzene contaminated soil, then by soil ratio be 0.3～0.5 in soil add go from
Sub-water, after after mix homogeneously of manually digging, standing adsorption fixes 1～2 week.
Example 1
Weigh 400g tea seed cake to put into corundum mortar grinds and cross 100 mesh standard sieves after 1～2h, obtain tea seed cake powder,
Again tea seed cake powder is put into baking oven, take out after being dried 5～6h at 60～70 DEG C, obtain pretreatment tea seed cake powder；By upper
State pretreated tea seed cake powder and petroleum ether by solid-to-liquid ratio be 1: 3 mixing after put into ultrasonic extraction instrument, with 200～300W merits
Rate ultrasonic extraction 20～30min, filters isolated filtering residue, with deionized water rinsing filtering residue 20～30min, is taken off after drying
Fat tea seed cake；By above-mentioned defat tea seed cake and absolute methanol be by volume 1: 6 mix after load in Soxhlet extraction device, add
Heat is warming up to 60～70 DEG C, is incubated reflux, extract, 2～3h with the speed of 11～13min/ time, collects extracting solution；By said extracted
Liquid is put in vacuum distillation apparatus, and reduce pressure Distillation recovery methanol, is spray-dried by the concentrated solution spray dryer obtained, obtains
Pale yellow powder, is natural surfactant saponin；It is by the zeolite granular of 200 mesh and above-mentioned to prepare at 20: 1 in mass ratio
Natural surfactant saponin mix homogeneously obtain strengthen absorption fixative, then by addition content be 10～15% by absorption increasing
Strong fixative joins in chlorobenzene contaminated soil, then is 0.3～0.5 to add deionized water in soil by soil ratio, manually turns over
After after soil mix homogeneously, standing adsorption fixes 1～2 week.
Example 2
Weigh 400～500g tea seed cakes to put into corundum mortar grinds and cross 100 mesh standard sieves after 1～2h, obtain tea seed cake
Powder, then tea seed cake powder is put into baking oven, take out after being dried 5～6h at 60～70 DEG C, obtain pretreatment tea seed cake powder；
Be to put into ultrasonic extraction instrument after 1: 3 mixing by above-mentioned pretreated tea seed cake powder and petroleum ether by solid-to-liquid ratio, with 200～
300W power ultrasonic extraction 20～30min, filters isolated filtering residue, with deionized water rinsing filtering residue 20～30min, after drying
Obtain defat tea seed cake；By above-mentioned defat tea seed cake and absolute methanol be by volume 1: 6 mix after load Soxhlet extraction
In device, it is heated to 60～70 DEG C, is incubated reflux, extract, 2～3h with the speed of 11～13min/ time, collects extracting solution；By upper
Stating extracting solution and put in vacuum distillation apparatus, reduce pressure Distillation recovery methanol, the concentrated solution spray dryer spray dried that will obtain
Dry, obtain pale yellow powder, be natural surfactant saponin；Be in mass ratio 20: 1 by the zeolite granular of 200 mesh and
Above-mentioned prepared natural surfactant saponin mix homogeneously obtains strengthening absorption fixative, then is 10～15% by addition content
By absorption enhancing fixative join in chlorobenzene contaminated soil, then by soil ratio be 0.3～0.5 in soil add deionization
Water, after after mix homogeneously of manually digging, standing adsorption fixes 1～2 week.
Example 3
Weigh 400～500g tea seed cakes to put into corundum mortar grinds and cross 100 mesh standard sieves after 1～2h, obtain tea seed cake
Powder, then tea seed cake powder is put into baking oven, take out after being dried 5～6h at 60～70 DEG C, obtain pretreatment tea seed cake powder；
Be to put into ultrasonic extraction instrument after 1: 3 mixing by above-mentioned pretreated tea seed cake powder and petroleum ether by solid-to-liquid ratio, with 200～
300W power ultrasonic extraction 20～30min, filters isolated filtering residue, with deionized water rinsing filtering residue 20～30min, after drying
Obtain defat tea seed cake；By above-mentioned defat tea seed cake and absolute methanol be by volume 1: 6 mix after load Soxhlet extraction
In device, it is heated to 60～70 DEG C, is incubated reflux, extract, 2～3h with the speed of 11～13min/ time, collects extracting solution；By upper
Stating extracting solution and put in vacuum distillation apparatus, reduce pressure Distillation recovery methanol, the concentrated solution spray dryer spray dried that will obtain
Dry, obtain pale yellow powder, be natural surfactant saponin；Be in mass ratio 20: 1 by the zeolite granular of 200 mesh and
Above-mentioned prepared natural surfactant saponin mix homogeneously obtains strengthening absorption fixative, then is 10～15% by addition content
By absorption enhancing fixative join in chlorobenzene contaminated soil, then by soil ratio be 0.3～0.5 in soil add deionization
Water, after after mix homogeneously of manually digging, standing adsorption fixes 1～2 week.
Claims (1)
1. the surfactant of soil organic contamination chlorobenzene strengthens the restorative procedure that absorption is fixing, it is characterised in that specifically repair step
Suddenly it is:
(1) weigh 400～500g tea seed cakes to put into corundum mortar grinds and cross 100 mesh standard sieves after 1～2h, obtain tea seed cake powder
End, then tea seed cake powder is put into baking oven, take out after being dried 5～6h at 60～70 DEG C, obtain pretreatment tea seed cake powder；
(2) it is to put into ultrasonic extraction instrument after 1: 3 mixing by above-mentioned pretreated tea seed cake powder and petroleum ether by solid-to-liquid ratio, with
200～300W power ultrasonics extractions 20～30min, filter isolated filtering residue, with deionized water rinsing filtering residue 20～30min,
Obtain defat tea seed cake after drying；
(3) by above-mentioned defat tea seed cake and absolute methanol be by volume 1: 6 mix after load in Soxhlet extraction device, heating
It is warming up to 60～70 DEG C, is incubated reflux, extract, 2～3h with the speed of 11～13min/ time, collects extracting solution；
(4) putting in vacuum distillation apparatus by said extracted liquid, reduce pressure Distillation recovery methanol, the concentrated solution spray dried that will obtain
Dry machine is spray-dried, and obtains pale yellow powder, is natural surfactant saponin；
(5) it is 20: 1 by the zeolite granular of 200 mesh and above-mentioned prepared natural surfactant saponin mixing all in mass ratio
Even obtain strengthen absorption fixative, then by addition content be 10～15% by absorption strengthen fixative join chlorobenzene contaminated soil
In, then by soil ratio be 0.3～0.5 in soil add deionized water, after mix homogeneously of manually digging standing adsorption fix 1～
After 2 weeks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610726429.8A CN106311730B (en) | 2016-08-19 | 2016-08-19 | The fixed restorative procedure of the surfactant enhancing absorption of soil organic contamination chlorobenzene |
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|---|---|---|---|
| CN201610726429.8A CN106311730B (en) | 2016-08-19 | 2016-08-19 | The fixed restorative procedure of the surfactant enhancing absorption of soil organic contamination chlorobenzene |
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| CN106311730A true CN106311730A (en) | 2017-01-11 |
| CN106311730B CN106311730B (en) | 2019-07-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976503A (en) * | 2019-12-16 | 2020-04-10 | 湖南大学 | Modified attapulgite and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811021A (en) * | 2010-04-26 | 2010-08-25 | 西北农林科技大学 | Amphiphilic adsorbent capable of adsorbing both organic matter and heavy metal cation and preparation method thereof |
-
2016
- 2016-08-19 CN CN201610726429.8A patent/CN106311730B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811021A (en) * | 2010-04-26 | 2010-08-25 | 西北农林科技大学 | Amphiphilic adsorbent capable of adsorbing both organic matter and heavy metal cation and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 刘沙沙等: "《挥发性有机物污染土壤修复技术研究进展》", 《安徽农业科学》 * |
| 张凯等: "《天然表面活性剂茶皂素的工业化制备技术研究》", 《广东化工》 * |
| 肖宁: "《二氯苯污染土壤修复技术初步研究》", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
| 郝秀珍等: "《沸石在土壤改良中的应用研究进展》", 《土壤》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976503A (en) * | 2019-12-16 | 2020-04-10 | 湖南大学 | Modified attapulgite and preparation method and application thereof |
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