CN105399245A - Remediation device of hexavalent chromium-polluted underground water, and remediation method thereof - Google Patents
Remediation device of hexavalent chromium-polluted underground water, and remediation method thereof Download PDFInfo
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- CN105399245A CN105399245A CN201510955512.8A CN201510955512A CN105399245A CN 105399245 A CN105399245 A CN 105399245A CN 201510955512 A CN201510955512 A CN 201510955512A CN 105399245 A CN105399245 A CN 105399245A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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- 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
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention relates to a remediation device of hexavalent chromium-polluted underground water. A water pumping system comprises a water pumping well, a well casing, and an immersible pump; the well casing is arranged in the water pumping well; the middle and lower part of the well casing is a sieve pipe; the immersible pump is arranged in the sieve pipe; one end of a conductive pipe is connected with the immsersible pump, and the other end is communicated with a water distribution main pipe on the ground; a water distribution system comprises a plurality of water distribution branch pipes and the water distribution main pipe; the water distribution branch pipes and the water distribution main pipe are connected; a filling material system comprises a baffle plate, and a reduction reaction filling material layer, an adsorption filling layer, and a permeable layer which are arranged in the baffle plate from top to bottom; the water distribution branch pipes are arranged on the upper part of the reduction reaction filling material layer in a radiation manner; the reduction reaction filling material layer is filled with a reduction reaction medium, and the reduction reaction medium is used for transforming hexavalent chromium in underground water into trivalent chromium via reduction; the adsorption filling layer is filled with an adsorbing medium, and the adsorbing medium is used for adsorbing the left hexavalent chromium pollutants in underground water; and the permeable layer is filled with a permeable medium, and the permeable medium is used for permeating of treated underground water. The remediation device is capable of reducing construction difficulty and remediation cost, and remediation materials can be replaced.
Description
Technical field
The present invention relates to a kind of prosthetic device and restorative procedure thereof of hexavalent chromium polluted underground water, belong to groundwater remediation technical field.
Background technology
Along with the quickening day by day of socioeconomic fast development and process of industrialization, groundwater pollution problem is day by day serious, hexavalent chromium polluted particularly noticeable due to its significant hazardness wherein in underground water.Sexavalent chrome is studied confirmation " three cause " pollutent, and it is main with CrO4 in soil and groundwater
2 ~and HCrO
4 ~exist etc. form, solubility is strong, easily moves, is decided to be in environment and endangers one of maximum pollutent, must control effectively to it.
At present, mainly adopting two kinds of technology to repair for hexavalent chromium polluted underground water, is extracting treatment technology and original position PRB recovery technique respectively.
1), pump-and-treat system recovery technique (P & T) is the classical recovery technique of underground water dystopy process, and apply latter stage in last century comparatively extensive abroad, it is released by contaminated underground water, then processes on the ground.Owing to being transferred on ground by the process place of underground water, therefore optional technology is more, is applicable to the groundwater treatment of all types of pollution.But the shortcomings such as it is long that this technology has repair time, and rehabilitation cost is high, and processing efficiency is low, thus in reparation field in recent years, this technology does not obtain large-scale propagation and employment.
2), original position PRB (PermeableReactiveBarrier) recovery technique.PRB recovery technique is the abbreviation of permeable reaction wall recovery technique, it is by installing permeable reaction material body of wall to tackle groundwater pollution plumage in underground, the multiple reactions such as Pollution Plume and reaction wall medium generation physics, chemistry, absorption, thus reduce underground water target pollutant concentration.Traditional PRB technology is a kind of passive based technique for in-situ remediation, and its repairing effect and hydrogeological conditions have very large associating.When Polluted area soil layer permeability coefficient to be repaired is less, traditional PRB repairing effect is relatively poor; Meanwhile, traditional PRB technology, when carrying out extensive area groundwater remediation, often needs dig on a wide area, and this not only causes difficulty of construction large, and rehabilitation cost increases, and is also unfavorable for the replacing of later stage PRB reaction material simultaneously.
Summary of the invention
The object of this invention is to provide one and can reduce difficulty of construction and rehabilitation cost, can to the prosthetic device of the hexavalent chromium polluted underground water that repair materials is changed and restorative procedure thereof.
The present invention is the technical scheme achieved the above object: a kind of prosthetic device of hexavalent chromium polluted underground water, it is characterized in that: comprise pumping system, water distribution system and filling system, described pumping system comprises pumped well, well casing and submersible pump, well casing is provided with in pumped well, the middle and lower part of well casing has the screen casing in below the water level face for being placed on target stains waterbearing stratum, submersible pump is arranged in screen casing, tube at one end be connected with the water outlet of submersible pump communicate, the other end stretches out well casing and is responsible for be connected with ground water distribution and communicate; Described water distribution system comprises water distribution supervisor and multiple water distribution branch pipe, and multiple water distribution branch pipe is responsible for water distribution and is connected, and each water distribution branch pipe is provided with multiple posticum along tube wall; Described filling system comprises baffle plate and to be arranged in baffle plate reduction reaction packing layer, absorption packing layer and pervious course from top to bottom, multiple water distribution branch pipe is laid in the top of reduction reaction packing layer radially, reduction reaction medium in reduction reaction packing layer is used for the hexavalent chromium pollutant in underground water to be reduced to trivalent chromium, adsorption medium in described absorption packing layer is used for remaining hexavalent chromium pollutant in attached ground water, and the permeating medium in described pervious course is for permeating the underground water after reparation.
Wherein: the reduction reaction medium of described reduction reaction packing layer is the iron powder of particle diameter at 1 ~ 5mm.
Adsorption medium in described absorption packing layer is that the zeolite of particle diameter at 1mm ~ 8mm is or/and activated carbon.
By mass percentage, described pervious course fills out interior permeating medium is that the particle diameter of 50 ~ 70% is at the gravel of 0.15mm ~ 0.55mm and the particle diameter of 30 ~ 50% gravel at 0.56mm ~ 1.0mm.
Described conduit top is provided with thief hole.
There is between described well casing and pumped well wilkinite sealing ply, between screen casing and pumped well, be filled with the gravel of particle diameter at 0.5mm ~ 10mm.
The present invention utilizes the prosthetic device of hexavalent chromium polluted underground water to the restorative procedure of hexavalent chromium pollutant in underground water: pumping system and water distribution system are arranged along water (flow) direction or Pollution Plume radiation direction, and pumping system is arranged on the downstream of current, water distribution system is arranged on the upstream of current, filling system is arranged on the upper epidermis of the soil of current upstream, to be arranged in well casing and the submersible pump being positioned at below target stains waterbearing stratum liquid level by the groundwater extraction that pollutes to ground, be transported in the water distribution supervisor of water distribution system by conduit, the underground water of pollution is evenly distributed in the reduction reaction packing layer of filling system by multiple water distribution branch pipes of water distribution system, by the reduction reaction medium in reduction reaction packing layer, the hexavalent chrome reduction in underground water is reacted into the trivalent chromium of low toxicity, underground water enters in absorption packing layer under gravity, adsorption medium in absorption packing layer adsorbs sexavalent chrome remaining in water, underground water after repairing under gravity, enters upstream region shallow aquifer by the permeating medium in the pervious course of bottom and enters in underground water again, when the underground water of pollution is transported to water distribution system by conduit, being sampled by the thief hole on aqueduct, the reparation situation of monitoring underground water, repairing to target value to arriving.
Wherein: the center of described pumping system and the width between centers of water distribution system are at 10 ~ 20m.
Prosthetic device of the present invention adopts pumping system, water distribution system and filling system, by pumping system and water distribution system, the ground water circulation of target stains is taken out note in filling system, its filling system adopts baffle plate and to be arranged in baffle plate reduction reaction packing layer, absorption packing layer and pervious course from top to bottom, by baffle plate by the soil of upper epidermis separately, the permeating medium material in reduction reaction packing layer, absorption packing layer and pervious course can be prevented on the one hand to run off, also constructability and management on the other hand, workable.Filling system is arranged on the upper epidermis position of soil by the present invention, facilitate the installation of prosthetic device and the operation and management in later stage, constructability and management, workable, especially in the filling system being convenient to the later stage, material is changed and management, greatly reduces the cost of reparation and construction and the cost runed.
The prosthetic device of the underground water that the present invention is hexavalent chromium polluted utilizes the dual mechanism of the reduction reaction medium in former reaction packing layer and the adsorption medium in absorption packing layer, that can remove in underground water to greatest extent is hexavalent chromium polluted, realize the efficient removal object of hexavalent chromium pollutant, and the underground water after repair process is from pervious course seepage flow to entering upstream region shallow-layer aqueous soil layer by action of gravity, in operational process, the circulation of pumping system and water distribution system is taken out water injection manifold and can be played cycling elution effect to soil, can promote that the pollutent in soil moves in underground water, thus improve reparation speed and the effect of underground water and soil, after repair while underground water, that has also repaired in soil is hexavalent chromium polluted, the effect of repairing can be ensured to greatest extent.Pumping system is arranged on the downstream of underground water by the present invention, by the extracting effect of extraction system, the travelling speed of underground water in soil can be accelerated, to improve the mobility of underground water in underground, improve the adaptability of PRB recovery technique for hyposmosis soil, also shorten the cycle required for whole repair process simultaneously.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 is the structural representation of the prosthetic device of the hexavalent chromium polluted underground water of the present invention.
Fig. 2 is the water distribution sectional view of filling system of the present invention.
Wherein: 1-pervious course, 2-absorption packing layer, 3-reduction reaction packing layer, 4-overburden layer, 5-water distribution is responsible for, 6-water distribution branch pipe, 7-conduit, 8-baffle plate, 9-shallow-layer aqueous soil layer, 10-thief hole, 11-well casing, 12-pumped well, 13-sealing ply, 14-gravel, 15-screen casing, 16-submersible pump.
Embodiment
See shown in Fig. 1 ~ 2, the prosthetic device of hexavalent chromium polluted underground water of the present invention, comprise pumping system, water distribution system and filling system, in use, pumping system and water distribution system can be arranged along water (flow) direction or Pollution Plume radiation direction, and pumping system is arranged on the downstream of current, water distribution system is arranged on the upstream of current, filling system is arranged on the upper epidermis place of the soil of current upstream, facility is simple, be easy to construction and management, workable, the material being convenient to the later stage is changed and management, greatly reduces the cost of reparation.
As shown in Figure 1, pumping system of the present invention comprises pumped well 12, well casing 11 and submersible pump 16, well casing 11 is provided with in pumped well 12, the middle and lower part of well casing 11 has the screen casing 15 in below the water level face for being placed on target stains waterbearing stratum, the caliber of well casing 11 is at 60mm ~ 200mm, and the caliber of screen casing 15 is identical with well casing 11 caliber, screen casing 15 hole is at 0.1mm ~ 1mm, 1m ~ 10m below the water level face that screen casing 15 part can be positioned at target stains waterbearing stratum, submersible pump 16 is arranged in screen casing 15, submersible pump 16 can be positioned at below target stains aquifer water plane 1m ~ 5m, conduit 7 one end is connected with the water outlet of submersible pump 16 and communicates, the other end stretches out well casing 11 and is responsible for 5 with ground water distribution and is connected and communicates, by the groundwater extraction of pollution in water distribution system, conduit 7 top of the present invention is provided with thief hole 10, therefore the underground water by the 10 pairs of extractings of this thief hole detects.As shown in Figure 1, the present invention has wilkinite sealing ply 13 between well casing 11 and pumped well 12, the gravel 14 of particle diameter 0.5mm ~ 10mm is filled with between screen casing 15 and pumped well 12, make the underground water of target stains by entering in pumped well 12 by the hole on screen casing 15 after gravel 14, then by submersible pump 16 and conduit 7 extracting to ground.
See shown in Fig. 1,2, water distribution system of the present invention comprises water distribution supervisor 5 and multiple water distribution branch pipe 6, the caliber of water distribution supervisor 5 can at 30mm ~ 100mm, the caliber of water distribution branch pipe 6 can at 30mm ~ 100mm, multiple water distribution branch pipe 6 and water distribution are responsible for 5 and are connected, and each water distribution branch pipe 6 is provided with multiple posticum along tube wall, and this water distribution branch pipe 6 is provided with 3 ~ 10 posticums, and the underground moisture of pollution at 0.1mm ~ 1mm, can be laid in filling system by posticum aperture.As shown in Figure 2, water distribution branch pipe 6 of the present invention is connected with supervisor radially, forms water distribution system.
As shown in Figure 1, filling system of the present invention comprises baffle plate 8 and to be arranged in baffle plate 8 reduction reaction packing layer 3 from top to bottom, absorption packing layer 2 and pervious course 1, overburden layer 4 is also provided with on reduction reaction packing layer 3 top, baffle plate 8 runs off for preventing filled media material, also the reduction reaction medium in later stage and the replacing of adsorption medium and management can be convenient to, baffle plate 8 of the present invention can adopt ABS plastic etc., baffle plate 8 can form different shapes, multiple water distribution branch pipes 6 are laid in the top of reduction reaction packing layer 3 radially, reduction reaction medium in reduction reaction packing layer 3 is used for the hexavalent chromium pollutant in underground water to be reduced to trivalent chromium, the reduction reaction medium of reduction reaction packing layer 3 of the present invention is the iron powder of particle diameter at 1 ~ 5mm, iron powder of the present invention can adopt zeroth order iron powder, and there is very strong reductibility, can with the Cr in water
6+effectively can there is reduction reaction, to Cr
6 +treatment effect very good, the underground water after reduction reaction can reduce toxicity.The present invention adsorbs adsorption medium in packing layer 2 for hexavalent chromium pollutant remaining in attached ground water, the present invention's adsorption medium adsorbed in packing layer 2 is that the zeolite of particle diameter at 1mm ~ 8mm is or/and activated carbon, when zeolite mixes with activated carbon, both ratios are not limit by mass percentage, and both particle diameters are not limit, if 50% particle diameter is at 1mm zeolite and the 50% particle diameter activated carbon at 1mm, by remaining hexavalent chromium pollutant in adsorption medium strong adsorption underground water, and improve chromic removal effect further, the present invention by reduction reaction and the dual mechanism of strong adsorption, that can remove in underground water to greatest extent is hexavalent chromium polluted, realize the efficient removal object of hexavalent chromium pollutant.As shown in Figure 1, permeating medium in pervious course 1 of the present invention is for permeating the underground water after reparation, by mass percentage, it is that the particle diameter of 50 ~ 70% is at the gravel of 0.15mm ~ 0.55mm and the particle diameter of 30 ~ 50% gravel at 0.56mm ~ 1.0mm that pervious course 1 fills out interior permeating medium, and the effect of rapid osmotic can be reached, enter again in underground water in the shallow-layer aqueous soil layer 9 underground water after process being entered bottom by pervious course 1, can while reparation underground water, hexavalent chromium polluted in soil is repaired, the effect of repairing can be ensured to greatest extent.
The method that the present invention repairs hexavalent chromium pollutant in underground water: pumping system and water distribution system are arranged along water (flow) direction or Pollution Plume radiation direction, and pumping system is arranged on the downstream of current, water distribution system is arranged on the upstream of current, both distances can be tested according to hydrogeological practical situation and determine, the center of pumping system and the width between centers of water distribution system are at 10 ~ 20m, be catheter center and water distribution is responsible for width between centers at 10 ~ 20m, filling system is arranged on the upper epidermis of the soil of current upstream, to be arranged in well casing 11 and the submersible pump 16 being positioned at below target stains waterbearing stratum liquid level by hexavalent chromium polluted groundwater extraction to ground, be transported in the water distribution supervisor 5 of water distribution system by conduit 7, the underground water of pollution is evenly distributed in the reduction reaction packing layer 3 of filling system by multiple water distribution branch pipes 6 of water distribution system, by the reduction reaction medium in reduction reaction packing layer 3, the hexavalent chrome reduction in underground water is reacted into the trivalent chromium of low toxicity, underground water enters in absorption packing layer 2 under gravity subsequently, adsorption medium in absorption packing layer 2 adsorbs sexavalent chrome remaining in underground water, further raising repairing effect, underground water after repairing under gravity, enter upstream region shallow-layer aqueous soil layer 9 by the permeating medium in the pervious course 1 of bottom and enter in underground water, when hexavalent chromium polluted for target underground water is transported to water distribution system by conduit 7, sampled by the thief hole 10 on aqueduct, can timing or random sampling, the reparation situation of monitoring underground water, repair to target value to arriving, be that sexavalent chrome average removal rate reaches more than 95% as repaired to target value.
The present invention repairs hexavalent chromium pollutant in the underground water in certain hexavalent chromium polluted region.This groundwater level depth 3m, waterbearing stratum thickness 8m, aeration zone and waterbearing stratum are mainly silty clay, and soil layer permeability coefficient is 7 × 10 ~ 7cm/s.This Polluted area quality of groundwater: pH is 6.95; In underground water, sexavalent chrome mean concns is 9.5mg/L, the top of screen casing 15 is positioned at below underground water liquid level 1m, submersible pump 16 is positioned at below underground water liquid level 5m, the gravel particle diameter of filling between screen casing 15 and pumped well 12 is at 5mm, the pump speed 300mL/min of submersible pump 16, other design parameter is shown in Table 1.
Table 1
The present invention monitors once to water quality in every 8 hours, measures by the mensuration mode of GB-T7467-87, stable latter 80 days, and monitored by thief hole 10 pairs of water quality, the concrete data of the underground water after reparation are shown in Table 2.
Table 2
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Hexavalent chromium concentration (mg/L) | 0.38 | 0.21 | 0.29 | 0.39 | 0.38 | 0.37 |
| Sexavalent chrome average removal rate (%) | 96 | 98 | 97 | 96 | 96 | 96 |
As can be seen from Table 2, the underground water after reparation reaches to be repaired to target value.Device of the present invention is in operational process, circulation due to pumping system and water distribution system is taken out water injection manifold and can be played cycling elution effect to soil, can promote that the pollutent in soil moves in underground water, thus improve reparation speed and the effect of underground water and soil.Meanwhile, also accelerate the travelling speed of underground water in soil, the cycle of whole reparation can be shortened.
Claims (8)
1. the prosthetic device of a hexavalent chromium polluted underground water, it is characterized in that: comprise pumping system, water distribution system and filling system, described pumping system comprises pumped well (12), well casing (11) and submersible pump (16), well casing (11) is provided with in pumped well (12), the middle and lower part of well casing (11) has the screen casing (15) in below the water level face for being placed on target stains waterbearing stratum, submersible pump (16) is arranged in screen casing (15), conduit (7) one end is connected with the water outlet of submersible pump (16) and communicates, the other end stretches out well casing (11) and is responsible for (5) with ground water distribution and is connected and communicates, described water distribution system comprises water distribution supervisor (5) and multiple water distribution branch pipe (6), multiple water distribution branch pipe (6) is responsible for (5) and is connected with water distribution, and each water distribution branch pipe (6) is provided with multiple posticum along tube wall, described filling system comprises baffle plate (8) and to be arranged in baffle plate (8) reduction reaction packing layer (3) from top to bottom, absorption packing layer (2) and pervious course (1), multiple water distribution branch pipe (6) is laid in the top of reduction reaction packing layer (3) radially, reduction reaction medium in reduction reaction packing layer (3) is used for the hexavalent chromium pollutant in underground water to be reduced to trivalent chromium, adsorption medium in described absorption packing layer (2) is used for remaining hexavalent chromium pollutant in attached ground water, permeating medium in described pervious course (1) is for permeating the underground water after reparation.
2. the prosthetic device of hexavalent chromium polluted underground water according to claim 1, is characterized in that: the reduction reaction medium of described reduction reaction packing layer (3) is the iron powder of particle diameter at 1 ~ 5mm.
3. the prosthetic device of hexavalent chromium polluted underground water according to claim 1, is characterized in that: the adsorption medium in described absorption packing layer (2) is that the zeolite of particle diameter at 1mm ~ 8mm is or/and activated carbon.
4. the prosthetic device of hexavalent chromium polluted underground water according to claim 1, it is characterized in that: by mass percentage, it is that the particle diameter of 50 ~ 70% is at the gravel of 0.15mm ~ 0.55mm and the particle diameter of 30 ~ 50% gravel at 0.56mm ~ 1.0mm that described pervious course (1) fills out interior permeating medium.
5. the prosthetic device of hexavalent chromium polluted underground water according to claim 1, is characterized in that: described conduit (7) top is provided with thief hole (10).
6. the prosthetic device of hexavalent chromium polluted underground water according to claim 1, it is characterized in that: there is between described well casing (11) and pumped well (12) wilkinite sealing ply (13), between screen casing (15) and pumped well (12), be filled with the gravel of particle diameter at 0.5mm ~ 10mm.
7. utilize the prosthetic device of the hexavalent chromium polluted underground water described in claim 1 to the restorative procedure of hexavalent chromium pollutant in underground water: pumping system and water distribution system to be arranged along water (flow) direction or Pollution Plume radiation direction, and pumping system is arranged on the downstream of current, water distribution system is arranged on the upstream of current, filling system is arranged on the upper epidermis of the soil of current upstream, to be arranged in well casing (11) and the submersible pump (16) being positioned at below target stains waterbearing stratum liquid level by the groundwater extraction that pollutes to ground, be transported in water distribution supervisor (5) of water distribution system by conduit (7), the underground water of pollution is evenly distributed in the reduction reaction packing layer (3) of filling system by multiple water distribution branch pipes (6) of water distribution system, by the reduction reaction medium in reduction reaction packing layer (3), the hexavalent chrome reduction in underground water is reacted into the trivalent chromium of low toxicity, underground water enters in absorption packing layer (2) under gravity, adsorption medium in absorption packing layer (2) adsorbs sexavalent chrome remaining in water, underground water after repairing under gravity, enters upstream region shallow aquifer by the permeating medium in the pervious course (1) of bottom and enters in underground water again, when the underground water of pollution is transported to water distribution system by conduit (7), being sampled by the thief hole (10) on aqueduct, the reparation situation of monitoring underground water, repairing to target value to arriving.
8. the prosthetic device of hexavalent chromium polluted underground water that utilizes according to claim 7 is to the restorative procedure of hexavalent chromium pollutant in underground water: it is characterized in that: the center of described pumping system and the width between centers of water distribution system are at 10 ~ 20m.
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| CN108435787A (en) * | 2018-05-23 | 2018-08-24 | 江南大学 | A kind of device and method using electric field and reactive barrier repairing polluted soil |
| CN108435787B (en) * | 2018-05-23 | 2020-07-07 | 江南大学 | Device and method for repairing polluted soil by using electric field and reaction barrier |
| CN108906865A (en) * | 2018-06-19 | 2018-11-30 | 绍兴市上虞众联环保有限公司 | A kind of method of soil remediation |
| CN109012592A (en) * | 2018-08-28 | 2018-12-18 | 肖宇琛 | The preparation method of charcoal compound adsorbent and to contain Cr (VI) waste water restorative procedure |
| CN110078151A (en) * | 2019-05-17 | 2019-08-02 | 中国地质大学（北京） | A kind of hexavalent chromium polluted method in in-situ immobilization low osmotic medium |
| CN110404956A (en) * | 2019-08-07 | 2019-11-05 | 上海洁壤环保科技有限公司 | A kind of soil and underground water complex repairation system and restorative procedure |
| CN111346591A (en) * | 2020-03-20 | 2020-06-30 | 中国科学院过程工程研究所 | Iron-based-bentonite/carbon composite porous material, and preparation method and application thereof |
| CN111346591B (en) * | 2020-03-20 | 2021-07-09 | 中国科学院过程工程研究所 | Iron-based-bentonite/carbon composite porous material, and preparation method and application thereof |
| CN113235710A (en) * | 2021-06-18 | 2021-08-10 | 生态环境部华南环境科学研究所 | Efficient underground water remediation system and method |
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