CN109187928A - A kind of column simulation acid rain leaching device - Google Patents
A kind of column simulation acid rain leaching device Download PDFInfo
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- CN109187928A CN109187928A CN201811199268.7A CN201811199268A CN109187928A CN 109187928 A CN109187928 A CN 109187928A CN 201811199268 A CN201811199268 A CN 201811199268A CN 109187928 A CN109187928 A CN 109187928A
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- 238000002386 leaching Methods 0.000 title claims abstract description 86
- 238000003916 acid precipitation Methods 0.000 title claims abstract description 41
- 238000004088 simulation Methods 0.000 title claims abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 46
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 10
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 5
- 231100000719 pollutant Toxicity 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 210000000576 arachnoid Anatomy 0.000 claims description 3
- 238000013508 migration Methods 0.000 claims description 3
- 230000005012 migration Effects 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 claims description 2
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000003900 soil pollution Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000302661 Phyllostachys pubescens Species 0.000 description 1
- 235000003570 Phyllostachys pubescens Nutrition 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of column simulation acid rain leaching devices.The column simulation acid rain leaching device includes leaching column, bracket, leachate receiving flask, constant flow peristaltic pump and Simulated Acid Rain container.The method of the present invention is by the way that detachable to leaching column lower end leaching head and top cover and cylinder, the loading of soil sample and unloading removing method carry out ingehious design and Optimal improvements in whole banket mode and leaching column inside leaching column, and for pollutants such as heavy metal ion under the conditions of research acid rain leaching, radial Transport provides a kind of column simulation acid rain leaching device in soil.In addition, the present apparatus has many advantages, such as that operational process is stable, low energy consumption and operating cost are cheap, data acquisition is convenient.
Description
Technical field
The invention belongs to soil remediation research field, in particular to a kind of column simulation acid rain leaching device.
Background technique
Whole nation soil environment situation totally allows of no optimist at present, and some areas soil pollution is heavier, arable soil environment matter
Amount causes anxiety, industry and mining discarded ground soil environment outstanding problem, is shown according to " national Soil Pollution Investigation bulletin in 2014 ",
The total point exceeding standard rate of national soil is 16.1%, based on inorganic type, accounts for the 82.8% of all exceeded points, mainly chromium, arsenic
With the 8 heavy metal species pollutants such as lead, the health of people is threaten by biological chain.Therefore heavy metal pollution of soil is carried out
Repairing and treating is extremely urgent.
The repair mode of heavy metal-polluted soil is varied, but be passivated Stabilization Remediation Technology because cost is relatively low, it is easy to operate,
Quick and suitable pollution in wide area is administered and is praised highly the most by market.Heavy-metal contaminated soil after repairing for passivation leads to
The experimental provision of ingehious design is crossed, rapid and convenient obtains heavy metal ion under acid rain eluviation and advises with soil depth migration and variation
Element release feature contained by rule and repair materials itself is particularly important.Column simulation acid rain leaching device is more at present, but
It is all using trouble, volume are larger, installation is inconvenient and analysis indexes are single mostly etc., affects the pre- of whole leaching device
Phase using effect.
Summary of the invention
The purpose of the present invention is to provide a kind of column simulation acid rain leaching device, the device is simple with device, operates
Easy, small volume and it is low in cost the advantages that.
Invention thinking: it is banketed by whole inside detachable, leaching column to leaching column lower end leaching head and top cover and cylinder
The loading of soil sample and unloading removing method carry out ingehious design and Optimal improvements in mode and leaching column, to study acid rain leaching
Under the conditions of the pollutants such as heavy metal ion radial Transport in soil a kind of column simulation acid rain leaching device is provided.
Object of the present invention is to be achieved by following technical proposals:
A kind of column simulation acid rain leaching device, the device include leaching column, bracket, leachate receiving flask, constant flow peristaltic pump and
Simulated Acid Rain container, wherein Simulated Acid Rain container, constant flow peristaltic pump and leaching column are connected using silica gel hose, and leachate is collected
Bottle is placed in the bottom end of leaching column, for collecting leachate.
The leaching column is made of organic glass, and it is highly 30 ~ 40cm that cylinder interior diameter, which is 4 ~ 6cm, and cylinder, which is equipped with, to be carved
Degree, zero groove is located at cylinder lower end, convenient for putting for different type soil sample；Cylinder upper and lower side appearance has arachnoid lines, point
Disassembly assembling is not carried out with lower end leaching column filter and top cover；It is equipped with inside the leaching column filter of lower end and is capable of the porous of installing and dismounting
Plate plays the role of load-bearing to upper layer of soil；Water-distribution nozzle is equipped with inside leaching column top cover, for uniformly drenching Simulated Acid Rain
Earth pillar upper layer of soil is filtered, the outside of top cover is equipped with water inlet, and diameter is 2 ~ 3mm, is equipped with air hole around water inlet.
Glass bead layer, filter paper layer, filter mesh layer, soil horizon, filter mesh layer, filter paper layer are followed successively by the leaching column from top to bottom
And porous plate；The height of soil horizon is 20cm, and setting blank, which is layered, fills out sample, i.e. the top half of soil horizon fills pollution or warp
Transpassivation treated contaminated soil, the lower half portion of soil horizon fill clean uncontaminated soil, for evaluating pollutant radial direction
Migration and variation rule.
The bracket be equipped with the equirotal fixation hole of leaching column outer diameter, for fixing different leaching columns, thus
Carry out lateral leaching comparative experiments.
There is the outer ring of a fixed lobe in the middle part of the leaching column, for leaching column to be fixed on bracket.
The constant flow peristaltic pump can adjust revolution, for controlling the leaching speed of Simulated Acid Rain.
Column simulation acid rain leaching device of the invention has the advantages that 1. devices are simply easy to manufacture, sampling behaviour
Facilitate, low in cost, same bracket can fix multiple leaching columns, be able to achieve the across comparison to Leaching Experiments result.2. leaching
Filter column is equipped with scale, is conducive to that the putting of soil in leaching column, soil sample is integrally released by scale after whole leaching process
And the subsequent soil sample to different height is acquired analysis.
Detailed description of the invention
Fig. 1 is leaching column and support schematic diagram in the embodiment of the present invention.
Fig. 2 is the schematic diagram of column simulation acid rain leaching device in the embodiment of the present invention.
Fig. 3 is influence of the Simulated Acid Rain to total chrome content in soil leachates in the embodiment of the present invention.
Marked in the figure: 1- leaching column；2- bracket；3- leachate receiving flask；4- constant flow peristaltic pump；5- Simulated Acid Rain container；
6- silica gel hose；+ 40 mesh filter screen layer (from top to bottom) of 7- glass bead layer+filter paper layer；8-40 mesh filter screen layer+filter paper layer+more hollow plates
(from top to bottom).
Specific embodiment
Embodiment:
In order to more preferably recognize the purpose of the present invention, technical solution and advantage, below in conjunction with attached drawing and example, to the present invention carry out into
One step is described in detail.
As depicted in figs. 1 and 2, set column simulation acid rain leaching device mainly includes leaching column 1, bracket 2, leaching
Liquid receiving flask 3, constant flow peristaltic pump 4 and Simulated Acid Rain container 5, wherein Simulated Acid Rain container 5, constant flow peristaltic pump 4 and leaching column 1 make
It is connected with silica gel hose 6.The 1 cylinder interior diameter of leaching column is 5cm, is highly 35cm, while cylinder is equipped with 0 ~ 35mm
Graduation mark, cylinder upper and lower side appearance has arachnoid lines, carries out disassembly assembling with lower end leaching column filter and top cover respectively,
The porous plate for capableing of installing and dismounting is equipped with inside the leaching column filter of lower end, filter water outlet diameter is 2mm, 1 other end of leaching column
Equipped with top cover, the inside of top cover is equipped with small-sized water-distribution nozzle, and external water inlet position diameter is 2mm, is equipped with around water inlet saturating
Stomata；The bracket 2 is equipped with the fixation hole that 5 diameters are equal to leaching column outer diameter, can fix multiple leaching columns 1, and it is laterally right to carry out
Compare Leaching Experiments；The leachate receiving flask 3 is 500mL, and Simulated Acid Rain container 5 is 500mL.Passivator choosing in the present embodiment
It selects moso bamboo and loses state Fe/C composite material (PBGC-Fe/C, ZL201210446693.8), plant is made full use of to lose the porous knot of state
Structure.
Use process: leaching column is from top to bottom successively are as follows: glass bead layer, 40 mesh filter screen layers, Medium speed filter paper layer, 20 cm high
Serial pedotheque, 40 mesh filter screen layers, Medium speed filter paper layer and porous plate, wherein the serial pedotheque of 20cm high is divided into two
Layer, upper layer are the pollution of chromium (Fe/C group) of the chromium-polluted soil (CK group) of processing or the PBGC-Fe/C of addition 5%, and lower layer is dry
Net uncontaminated soil；Leachate uses SO4 2-: NO3 -Molar concentration rate is the H of 4:12SO4/HNO3Mixed liquor as acid rain mother liquor,
Then the leachate for being 3.5 and 4.5 with the mother liquor pH value, respectively represents strong acid rain and typical acid rain；Leaching method uses
Intermittent leaching, by taking Guangxi District as an example, according to being 1949 mm when regional annual rainfall, rainwash measures the 25 of annual rainfall
%, practical year leaching is 1949 × (1-0.25)=1462 mm, by leaching column soil sectional area calculated result, practical year leaching
2.5 L of molten measurement, Simulated Acid Rain leaching volume flow rate be 25 mL/h, daily leaching 10 hours or so, each leaching acid rain volume
For 250mL, successive leaching 10 days, different time sections leachate target concentration of heavy metal ion and pH value are tested.
Four groups of Leaching Experiments are set, i.e., two groups of soil horizons are untreated contaminated soil+clean uncontaminated soil, are used respectively
Simulated Acid Rain pH=3.5 or 4.5 leachings (being denoted as CK-3.5 and CK-4.5), in addition two groups i.e. soil horizon be Passivation Treatment after pollute
Soil+clean uncontaminated soil, respectively with Simulated Acid Rain pH=3.5 or 4.5 leachings (being denoted as Fe/C-3.5 and Fe/C-4.5), institute
It is as shown in Figure 3 to obtain experimental result.The chromium for showing that passivator PBGC-Fe/C can be obstructed effectively in soil is released with the leaching of acid rain
It puts, reduces heavy metal because eluviation enters lower soil, while also having certain buffer function to acid rain.
Particular embodiments described above is only used to explain the present invention, is not intended to limit the present invention, it should be understood that all
Any simple modification, equivalent change and modification to the above embodiments according to the technical essence of the invention, still belong to this hair
The protection scope of bright technical solution.
Claims (1)
1. a kind of column simulation acid rain leaching device, it is characterised in that the column simulation acid rain leaching device include leaching column (1),
Bracket (2), leachate receiving flask (3), constant flow peristaltic pump (4) and Simulated Acid Rain container (5), wherein Simulated Acid Rain container (5), permanent
Stream peristaltic pump (4) is connected with leaching column (1) using silica gel hose (6), and leachate receiving flask (3) is placed in leaching column (1)
Bottom end, for collecting leachate；
The leaching column (1) is made of organic glass, and it is highly 30 ~ 40cm that cylinder interior diameter, which is 4 ~ 6cm, and cylinder, which is equipped with, to be carved
Degree, zero groove is located at cylinder lower end, convenient for putting for different type soil sample；Cylinder upper and lower side appearance has arachnoid lines, point
Disassembly assembling is not carried out with lower end leaching column filter and top cover；It is equipped with inside the leaching column filter of lower end and is capable of the porous of installing and dismounting
Plate plays the role of load-bearing to upper layer of soil；Water-distribution nozzle is equipped with inside leaching column top cover, for uniformly drenching Simulated Acid Rain
Earth pillar upper layer of soil is filtered, the outside of top cover is equipped with water inlet, and diameter is 2 ~ 3mm, is equipped with air hole around water inlet；
It is followed successively by glass bead layer, filter paper layer, filter mesh layer, soil horizon, filter mesh layer, filter paper layer from top to bottom in the leaching column (1)
And porous plate；The height of soil horizon is 20cm, and setting blank, which is layered, fills out sample, i.e. the top half of soil horizon fills pollution or warp
Transpassivation treated contaminated soil, the lower half portion of soil horizon fill clean uncontaminated soil, for evaluating pollutant radial direction
Migration and variation rule；
The bracket (2) be equipped with the equirotal fixation hole of leaching column (1) outer diameter, for fixing different leaching columns
(1), to carry out lateral leaching comparative experiments；
There is the outer ring of a fixed lobe in the middle part of the leaching column (1), for leaching column (1) to be fixed on bracket (2)；
The constant flow peristaltic pump (4) can adjust revolution, for controlling the leaching speed of Simulated Acid Rain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811199268.7A CN109187928A (en) | 2018-10-15 | 2018-10-15 | A kind of column simulation acid rain leaching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811199268.7A CN109187928A (en) | 2018-10-15 | 2018-10-15 | A kind of column simulation acid rain leaching device |
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| CN109187928A true CN109187928A (en) | 2019-01-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110118866A (en) * | 2019-05-27 | 2019-08-13 | 安徽科技学院 | The release imitative experimental appliance of heavy metal in a kind of CHARACTERISTICS OF TAILINGS SAND |
| CN113720993A (en) * | 2021-07-12 | 2021-11-30 | 中国农业大学 | Earth pillar test device |
| CN115932210A (en) * | 2022-11-15 | 2023-04-07 | 中国矿业大学(北京) | Mine goaf underground water leaching simulation device and experiment method |
| CN115951032A (en) * | 2022-10-17 | 2023-04-11 | 中国矿业大学(北京) | Groundwater leaching simulation device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110118866A (en) * | 2019-05-27 | 2019-08-13 | 安徽科技学院 | The release imitative experimental appliance of heavy metal in a kind of CHARACTERISTICS OF TAILINGS SAND |
| CN110118866B (en) * | 2019-05-27 | 2021-09-28 | 安徽科技学院 | Heavy metal release simulation experiment device in tailing sand |
| CN113720993A (en) * | 2021-07-12 | 2021-11-30 | 中国农业大学 | Earth pillar test device |
| CN115951032A (en) * | 2022-10-17 | 2023-04-11 | 中国矿业大学(北京) | Groundwater leaching simulation device and method |
| CN115932210A (en) * | 2022-11-15 | 2023-04-07 | 中国矿业大学(北京) | Mine goaf underground water leaching simulation device and experiment method |
| CN115932210B (en) * | 2022-11-15 | 2023-08-18 | 中国矿业大学(北京) | Underground water leaching simulation device and experimental method for mine goaf |
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