CN103613257A - Active covering method for in-situ remediation of sediments - Google Patents
Active covering method for in-situ remediation of sediments Download PDFInfo
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- CN103613257A CN103613257A CN201310652350.1A CN201310652350A CN103613257A CN 103613257 A CN103613257 A CN 103613257A CN 201310652350 A CN201310652350 A CN 201310652350A CN 103613257 A CN103613257 A CN 103613257A
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Abstract
The invention discloses an active covering method for the in-situ remediation of sediments, relates to an active covering method for carrying out in-situ remediation on contaminated sediments, and is designed for solving the technical problem that an existing in-situ covering technology has a poor treatment capacity on combined pollutions due to thick covering. The method comprises the following steps: uniformly scattering pretreated ferrihydrite powder in a water body, so that the pretreated ferrihydrite powder is covered on sediments at the bottom of the water body; uniformly scattering pretreated calcite sand in the water body, so that the calcite sand is covered on the ferrihydrite powder layer; submerging pretreated geotechnical cloth in the bottom of the water body, so that the geotechnical cloth is uniformly covered on the calcite sand layer; uniformly scattering pretreated local river sand in the water body, so that the local river sand is covered on the geotechnical cloth. Ferrihydrite, calcite and local river sand used in the method are all natural materials, easy to obtain, and low in cost; the geotechnical cloth is pollution-free and low in cost, therefore, the method is technically economical and feasible. The invention belongs to the field of in-situ remediation of sediments.
Description
Technical field
The present invention relates to a kind of active covering method of contaminated sediment remediation being carried out to original position reparation.
Background technology
Body eutrophication is administered the release that must cut down Inner nutrition salt, and Marine sediments control techniques mainly contains in-situ treatment technology and the large class of dystopy treatment technology two both at home and abroad.Wherein, the principle of original position soverlay technique is to utilize physics, chemistry or biological method at one or more layers material of contaminated sediment remediation surface coverage, settling and water body is separated, thereby stop pollutent to discharge in water body.
Original position soverlay technique is developed so far, and has experienced natural materials, modified clay material and 3 stages of active material.As a kind of emerging sediment remediation technology, active original position covers with traditional controlled naturally recovery and compares with dystopy improvement technology, with have Financial cost low, control effective, to advantages such as environmental influence are little, application potential is huge, is also one of eutrophied water treatment field Future Development direction.Existing original position soverlay technique is mostly used corresponding chemical reactivity material for certain pollutant, in order to reach effective obstruct object, often cover very thickly, therefore generally have the following disadvantages: the selectivity of 1) processing is stronger, for combined pollution processing power a little less than; 2) hydraulic disturbance such as stormy waves may destroy tectum; 3) non-local covering material is on benthic impact; 4) reduce the usable storage of water body.
Summary of the invention
The object of the invention is for solve existing original position soverlay technique weak to combined pollution processing power, be easily damaged, environment is friendly not and reduce the technical problem of usable storage, and a kind of active covering method of repairing for settling original position is provided.
The active covering method of repairing for settling original position is as follows:
One, choosing of situ capping materials: choose ferrihydrite, calcite, geotextile and local river sand;
Two, the pre-treatment of situ capping materials: ferrihydrite is crossed 200 mesh sieves after crushed, cleans standby; Calcite is crossed 40 mesh sieves after crushed, cleans standby; Geotextile is cleaned standby; Local river sand is cleaned standby;
Three, the pretreated ferrihydrite powder of step 2 is evenly sprinkled on the settling that water body covers water bottom, the ferrihydrite bisque mean thickness covering on settling is 5mm;
Four, the pretreated calcite sand of step 2 is evenly sprinkled into water body and covers on ferrihydrite bisque, the calcite layer of sand mean thickness covering on ferrihydrite bisque is 10mm;
Five, the pretreated geotextile of step 2 is sunk to water bottom, uniform fold is to calcite layer of sand;
Six, the pretreated local river sand of step 2 is evenly sprinkled into water body and covers in geotextile, the local river sand layer mean thickness covering in geotextile is 20mm.
Geotextile described in step 1 is terylene non-woven fabric.
The invention has the beneficial effects as follows:
1) because ferrihydrite all shows stronger adsorptive power to multiple positively charged ion, negatively charged ion, therefore, as a kind of active layer material, except Phosphate Sorption acid group, to heavy metals such as arsenic, lead, zinc, copper, cadmiums, there are the organism such as organic acid to have very strong loading capacity; Calcite can form and stablize nontoxic phosphoric acid salt the precipitation of phosphate radical.These two kinds of active materials can adsorb simultaneously and precipitate significantly reduce multiple dissolubility pollutant by settling the rate of migration to water body;
2) geotextile has higher-strength, hypertonicity, the advantage such as corrosion-resistant, ageing-resistant, and fixedly contaminated sediment remediation, reduces hydraulic action to tectal erosion, increases the service life;
3) covering of local river sand has ecological friendly feature, is suitable for reconstruction and the recovery of benthic community;
4) 4 layers of composite design, tectum total thickness is no more than 40mm, when can significantly not reduce water body storage capacity, can also guarantee lower vertical permeability coefficient, plays the effect of physical barrier;
5) ferrihydrite, calcite and local river sand are all natural materialss, are easy to obtain, with low cost; Geotextile is pollution-free, with low cost, so present method Technological Economy, feasible.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention, and in figure, 1 represents water body, and 2 represent local river sand layer, and 3 represent geotextile, and 4 represent calcite layer of sand, and 5 represent ferrihydrite bisque, and 6 represent the settling of water bottom.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: the active covering method of repairing for settling original position is as follows:
One, choosing of situ capping materials: choose ferrihydrite, calcite, geotextile and local river sand;
Two, the pre-treatment of situ capping materials: ferrihydrite is crossed 200 mesh sieves after crushed, cleans standby; Calcite is crossed 40 mesh sieves after crushed, cleans standby; Geotextile is cleaned standby; Local river sand is cleaned standby;
Three, the pretreated ferrihydrite powder of step 2 is evenly sprinkled on the settling that water body covers water bottom, the ferrihydrite bisque mean thickness covering on settling is 5mm;
Four, the pretreated calcite sand of step 2 is evenly sprinkled into water body and covers on ferrihydrite bisque, the calcite layer of sand mean thickness covering on ferrihydrite bisque is 10mm;
Five, the pretreated geotextile of step 2 is sunk to water bottom, uniform fold is to calcite layer of sand;
Six, the pretreated local river sand of step 2 is evenly sprinkled into water body and covers in geotextile, the local river sand layer mean thickness covering in geotextile is 20mm.
Embodiment two: what present embodiment was different from embodiment one is that geotextile described in step 1 is terylene non-woven fabric.Other is identical with embodiment one.
Adopt following experimental verification effect of the present invention:
Get the deposition core of the representative temperate zone nutrition enriched shallow lake in the Australian southeast, adopt the method for embodiment one to cover 3 deposition cores as treatment group, separately get 3 deposition cores that do not deal with as a control group, the content of total phosphorus in water and total nitrogen was carried out to Real-Time Monitoring in continuous 15 days.
Result shows, the total phosphorous for the treatment of group water body is progressively reducing always, from (0.23 ± 0.06) mg/L, drop to (0.06 ± 0.03) mg/L, and the total phosphorous of control group is always in fluctuation status, average content is (0.23 ± 0.05) mg/L.As calculated, treatment group water body total phosphorous compared with control group decreased average 51.0%.Although all showing as, the total nitrogen content for the treatment of group and control group water body first increases the trend reducing again, and there is no difference between first 3 days treatment group and control group, but since the 3rd day, the total nitrogen content for the treatment of group progressively drops to (1.30 ± 0.06) mg/L from (2.40 ± 0.67) mg/L, and control group only drops to (2.03 ± 0.52) mg/L from (2.33 ± 0.35) mg/L.As calculated, treatment group water body total nitrogen content compared with control group decreased average 25.1%.
As can be seen here, after adopting present method to cover, in settling all there is obvious reduction effect to the release of water body in total phosphorus, total nitrogen, and the processing of 15 days can be cut down the total phosphorous of half and 1/4th total nitrogen content, makes lake from bad V class quality recovery to III to IV class water quality.
Claims (2)
1. the active covering method of repairing for settling original position, is characterized in that the active covering method of repairing for settling original position is as follows:
One, choosing of situ capping materials: choose ferrihydrite, calcite, geotextile and local river sand;
Two, the pre-treatment of situ capping materials: ferrihydrite is crossed 200 mesh sieves after crushed, cleans standby; Calcite is crossed 40 mesh sieves after crushed, cleans standby; Geotextile is cleaned standby; Local river sand is cleaned standby;
Three, the pretreated ferrihydrite powder of step 2 is evenly sprinkled on the settling that water body covers water bottom, the ferrihydrite bisque mean thickness covering on settling is 5mm;
Four, the pretreated calcite sand of step 2 is evenly sprinkled into water body and covers on ferrihydrite bisque, the calcite layer of sand mean thickness covering on ferrihydrite bisque is 10mm;
Five, the pretreated geotextile of step 2 is sunk to water bottom, uniform fold is to calcite layer of sand;
Six, the pretreated local river sand of step 2 is evenly sprinkled into water body and covers in geotextile, the local river sand layer mean thickness covering in geotextile is 20mm.
2. the active covering method of repairing for settling original position according to claim 1, is characterized in that geotextile described in step 1 is terylene non-woven fabric.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104528906A (en) * | 2014-12-31 | 2015-04-22 | 泉州师范学院 | Bottom mud passivation system suitable for aquatic ecological reconstruction and construction technology thereof |
| CN106012970A (en) * | 2016-05-23 | 2016-10-12 | 中交第航务工程局有限公司 | Construction method for covering foundation bed with geotechnical cloth to prevent back silting |
| CN106186596A (en) * | 2016-07-01 | 2016-12-07 | 中国环境科学研究院 | A kind of resistance control device and method polluted for water body in lake |
| CN107121527A (en) * | 2017-05-03 | 2017-09-01 | 中国环境科学研究院 | The appraisal procedure and device of a kind of lake sediment covering material control effect |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412572A (en) * | 2008-11-17 | 2009-04-22 | 南开大学 | In-situ covering method for heavy metal in nano agustite immobilized sediment |
-
2013
- 2013-12-05 CN CN201310652350.1A patent/CN103613257A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412572A (en) * | 2008-11-17 | 2009-04-22 | 南开大学 | In-situ covering method for heavy metal in nano agustite immobilized sediment |
Non-Patent Citations (1)
| Title |
|---|
| 祝凌燕等: "受污染沉积物原位覆盖材料研究进展", 《生态学杂志》, vol. 27, no. 04, 30 December 2008 (2008-12-30), pages 645 - 651 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104528906A (en) * | 2014-12-31 | 2015-04-22 | 泉州师范学院 | Bottom mud passivation system suitable for aquatic ecological reconstruction and construction technology thereof |
| CN104528906B (en) * | 2014-12-31 | 2017-05-10 | 泉州师范学院 | Bottom mud passivation system suitable for aquatic ecological reconstruction and construction technology thereof |
| CN106012970A (en) * | 2016-05-23 | 2016-10-12 | 中交第航务工程局有限公司 | Construction method for covering foundation bed with geotechnical cloth to prevent back silting |
| CN106186596A (en) * | 2016-07-01 | 2016-12-07 | 中国环境科学研究院 | A kind of resistance control device and method polluted for water body in lake |
| CN106186596B (en) * | 2016-07-01 | 2019-03-29 | 中国环境科学研究院 | A kind of resistance control device and method for water body in lake pollution |
| CN107121527A (en) * | 2017-05-03 | 2017-09-01 | 中国环境科学研究院 | The appraisal procedure and device of a kind of lake sediment covering material control effect |
| CN107121527B (en) * | 2017-05-03 | 2019-05-24 | 中国环境科学研究院 | A kind of appraisal procedure and device of lake sediment covering material control effect |
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Application publication date: 20140305 |