CN109975510B - Soil leaching liquid collecting device and collecting method - Google Patents
Soil leaching liquid collecting device and collecting method Download PDFInfo
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- CN109975510B CN109975510B CN201910190671.1A CN201910190671A CN109975510B CN 109975510 B CN109975510 B CN 109975510B CN 201910190671 A CN201910190671 A CN 201910190671A CN 109975510 B CN109975510 B CN 109975510B
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- 239000007788 liquid Substances 0.000 title claims abstract description 151
- 238000002386 leaching Methods 0.000 title claims abstract description 58
- 239000002689 soil Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007599 discharging Methods 0.000 claims description 27
- 238000005070 sampling Methods 0.000 claims description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000006004 Quartz sand Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 9
- 230000002829 reductive effect Effects 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
-
- 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
Abstract
The invention relates to a soil leaching liquid collecting device and a collecting method. The invention has ingenious design, can effectively avoid long-time contact of the soil leachate and air, is beneficial to oxygen-free collection of the leaching liquor containing the reducibility sensitivity index, avoids oxidation and precipitation of the reducibility sensitivity index, ensures the authenticity of the collected leaching liquor component, and avoids experimental errors caused by the oxidation and precipitation. The collecting device provided by the invention has the advantages of simple structure, convenience in use and low cost, and is suitable for popularization and application.
Description
Technical Field
The invention relates to a soil detection device and a soil detection method, in particular to a soil leaching liquid collecting device and a soil leaching liquid collecting method.
Background
The material composition of the soil closely influences the ecological quality of the soil and the migration and change behaviors of environmental factors contacted with the soil. The soil column leaching experiment maintains the structural integrity of soil particles when obtaining soil leaching solution, and can simulate natural dynamic infiltration processes such as precipitation, irrigation and the like, so that the soil column leaching experiment is widely applied to soil chemistry and soil pollution repair research.
At present, the method for collecting the leaching solution in the natural leaching process of the field soil is to pump the leaching solution into a sampling bottle after the solution in a liquid storage device is collected to a certain amount, and the property of the leaching solution can be changed due to long-time exposure in the air in the collecting and extracting processes, especially the possible reductive sensitivity index (such as NH 4 + 、 2- S、Fe 2+ DOC, etc.) may oxidize and precipitate, etc., resulting in a change in the composition of the collected leaching solution, and thus an error in experimental data.
Disclosure of Invention
The invention aims to provide a soil leaching liquid collecting device, which is used for solving the problem that the existing collecting method is not suitable for soil leaching liquid containing reduction sensitive substances.
The second purpose of the invention is to provide a method for collecting the soil leaching solution so as to realize anaerobic collection of the soil leaching solution containing reduction sensitive substances.
One of the objects of the present invention is achieved by: a soil leaching liquid collecting device comprises a receiving tray for receiving leaching liquid, a liquid storage device communicated with the bottom of the receiving tray, a sampling bottle communicated with the bottom of the liquid storage device through a sampling conduit, an inflating device for inflating the liquid storage device, an exhaust pipe for exhausting gas in the liquid storage device and a controller for controlling the inflating device;
the liquid storage device comprises a cylinder, a baffle plate arranged in the cylinder, a liquid discharge piston, a high liquid level sensor and a low liquid level sensor, wherein the high liquid level sensor and the low liquid level sensor are arranged on the side wall of the cylinder and used for monitoring the liquid level in the cylinder, the liquid discharge piston can reciprocate in the cylinder below the baffle plate to divide the cylinder into two parts, the upper part of the cylinder is a gas cavity, the lower part of the cylinder is a liquid cavity, and the high liquid level sensor and the low liquid level sensor are respectively and electrically connected with the controller through leads;
the exhaust pipe comprises a pipe body, an exhaust piston and a hard supporting rod, wherein the exhaust piston and the hard supporting rod are arranged in the pipe body, the bottom of the pipe body penetrates through the baffle plate to be inserted into the gas cavity, an expansion part is arranged on the pipe body, the exhaust piston is located above the expansion part and can slide back and forth in the pipe body, the upper end of the hard supporting rod is connected to the exhaust piston, and the lower end of the hard supporting rod is connected to the liquid discharge piston.
The receiving tray comprises a funnel-shaped tray body and a filter layer arranged on the tray body, wherein the bottom end of the tray body is communicated with the bottom of the barrel through a connecting pipe, and a one-way valve for circulating to the barrel is arranged on the connecting pipe. The filter layer comprises a filter plate arranged at the disc opening of the disc body and a quartz sand layer arranged below the filter plate, and gauze meshes are respectively arranged on the upper surface and the lower surface of the quartz sand layer.
The air charging device comprises an air charging pipe and an air charging pump, one end of the air charging pipe is connected with the air charging pump, the other end of the air charging pipe stretches into the air cavity, and the air charging pump is electrically connected with the controller.
The sampling conduit sequentially passes through the baffle plate and the liquid draining piston and then stretches into the liquid cavity.
The second object of the invention is realized in that: a method for collecting soil leaching liquid comprises the following steps:
1) Providing a soil leaching solution collecting device as described above;
2) The leaching liquid received by the receiving disc flows into the liquid cavity of the cylinder body through the connecting pipe, and the liquid draining piston moves upwards along with the increase of the leaching liquid in the cylinder body;
3) When the liquid level of the leaching solution in the cylinder reaches the position of a high liquid level line, the high liquid level sensor sends a signal to the controller, the air charging device is started to charge air into the gas cavity of the cylinder, the liquid discharging piston is pressed to move downwards, leaching liquid below the liquid discharging piston is pressed into the sampling guide pipe, and then the liquid enters the sampling bottle, and the liquid level of the leaching solution in the cylinder gradually drops; the hard support rod drives the exhaust piston to move downwards while the liquid discharge piston moves downwards;
4) When the liquid level of the leachate in the cylinder body is reduced to a low liquid level line position, the low liquid level sensor sends a signal to the controller, the air charging device is closed, at the moment, the air discharging piston of the air discharging pipe moves down to the expansion part, air in the air cavity is discharged outside through a gap between the air discharging piston and the side wall of the expansion part, the air pressure above the air discharging piston is reduced, the air discharging piston moves upwards again, and the hard supporting rod and the air discharging piston are pushed to move upwards until the air discharging piston passes through the expansion part, and the air discharging process is finished;
5) And (3) repeating the steps 2) to 4), so that the collection of the leachate under the anaerobic condition is realized.
In the method, the receiving tray comprises a funnel-shaped tray body and a filter layer arranged on the tray body, wherein the bottom end of the tray body is communicated with the bottom of the cylinder through a connecting pipe, and a one-way valve which flows to the cylinder is arranged on the connecting pipe; the leachate is filtered by the filter layer and then flows into the liquid cavity of the cylinder body through the connecting pipe.
The collecting device has ingenious structural design, can effectively avoid long-time contact of the soil leachate and air, is beneficial to oxygen-free collection of the leaching liquor containing the reducibility sensitivity index, avoids oxidation and precipitation of the reducibility sensitivity index, ensures the authenticity of the collected leaching liquor components, and avoids experimental errors caused by the oxidation and precipitation. The collecting device provided by the invention has the advantages of simple structure, convenience in use and low cost, and is suitable for popularization and application.
The collecting method is simple to operate, the collection of the soil leaching solution under the anaerobic condition is realized, and the accuracy of the soil leaching test result is greatly improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a partial enlarged view of the exhaust pipe.
In the figure: 1. the device comprises a receiving disc, 2, a support, 3, a quartz sand layer, 4, a gauze, 5, a connecting pipe, 6, a one-way valve, 7, a cylinder, 8, a baffle plate, 9, a liquid discharge piston, 10, a low liquid level sensor, 11, a high liquid level sensor, 12, a wire, 13, a controller, 14, an inflator pump, 15, an inflation pipe, 16, a sampling conduit, 17, a sampling bottle, 18, an exhaust pipe, 18-1, an exhaust piston, 18-2, an expansion part, 18-3 and a hard support rod.
Detailed Description
Example 1: and a soil leaching liquid collecting device.
As shown in fig. 1, the invention mainly comprises a receiving disc 1, a liquid reservoir (a cylinder 7, a baffle plate 8, a liquid discharging piston 9, a low liquid level sensor 10 and a high liquid level sensor 11), an exhaust pipe 18, a sampling bottle 17, an inflating device (an inflating pipe 15 and an inflating pump 14), a controller 13 and the like.
The receiving tray 1 is used for receiving the soil leaching solution and carrying out preliminary filtration on the soil leaching solution. The receiving tray 1 comprises a funnel-shaped tray body, a filter plate arranged at the tray opening, two layers of nylon gauze 4 arranged below the filter plate and a quartz sand layer 3 arranged between the two layers of nylon gauze 4. The plate body of the filter plate is sunken towards the bottom of the plate body, the nylon gauze 4 is a nylon gauze 4 with 100 meshes, and the grain size of quartz sand in the quartz sand layer 3 is 40-60 meshes. The filter plate, the gauze 4 and the quartz sand layer 3 together form a filter layer, which plays a role in preliminary filtration of leaching liquid and prevents large particles from entering the connecting pipe 5 to cause blockage. The receiving tray 1 can collect the leachate in a large area, and the leachate can flow downwards rapidly along the funnel-shaped gradient of the tray body and then flows into the liquid reservoir through the connecting pipe 5 at the bottom.
The liquid reservoir is characterized in that a baffle plate 8 is fixedly arranged in the cylinder 7 to separate the lower part of the cylinder 7 from the outside air so as to form a liquid collecting section. A liquid discharge piston 9 is arranged in the liquid collecting section of the cylinder 7 in a sliding manner, the bottom of the liquid discharge piston 9 protrudes downwards to form an arc surface which is close to the arc bottom surface of the cylinder, and when the liquid discharge piston 9 moves downwards to the bottom, the protruding arc surface is basically matched with the bottom surface of the cylinder, and a gap is reserved for leaching solution to flow in. The liquid-discharging piston 9 divides the liquid-collecting section into an upper part and a lower part, the upper part is a gas cavity, the lower part is a liquid cavity, the liquid-discharging piston 9 moves up and down, and the volumes of the gas cavity and the liquid cavity are changed. The cylinder 7 is a columnar container made of organic glass, the bottom (liquid cavity) of the cylinder is communicated with the bottom of the receiving tray 1 through a connecting pipe 5, a one-way valve 6 is arranged on the connecting pipe 5 at a position close to the liquid reservoir, and the one-way valve 6 only allows the leachate to flow unidirectionally from the receiving tray 1 to the liquid reservoir. An upper non-contact liquid level sensor and a lower non-contact liquid level sensor are arranged on the side wall of the liquid collecting section of the cylinder 7, one is a high liquid level sensor 11, the other is a low liquid level sensor 10, and the two liquid level sensors are respectively and electrically connected with a controller 13 through leads 12 and are used for monitoring the liquid level in the cylinder 7.
As shown in FIG. 2, the exhaust tube 18 includes a tube body, an exhaust piston 18-1 disposed inside the tube body, and a hard strut 18-3. The bottom end of the pipe body passes through the baffle plate 8 and enters the gas cavity between the baffle plate 8 and the liquid discharge piston 9, and the pipe body is provided with an expansion part 18-2 which is matched with the exhaust piston 18-1 to realize the exhaust. The exhaust piston 18-1 is located above the expansion portion 18-2 and is reciprocally movable up and down in the tube body, and when the exhaust piston 18-1 moves to the expansion portion 18-2, the gas in the gas chamber is discharged from the gap between the exhaust piston 18-1 and the side wall of the expansion portion 18-2. The upper end of the hard support rod 18-3 is connected to the exhaust piston 18-1, and the lower end is connected to the liquid discharge piston 9, so that synchronous movement of the exhaust piston 18-1 and the liquid discharge piston 9 is realized, namely, the liquid discharge piston 9 moves up and down in the cylinder 7, and the hard support rod 18-3 drives the exhaust piston 18-1 to move up and down in the cylinder.
The air charging device comprises an air charging pipe 15 and an air charging pump 14, one end of the air charging pipe 15 penetrates through the baffle plate 8 and enters an air cavity between the baffle plate 8 and the liquid discharging piston 9, the air charging pipe 15 is in seamless sealing connection with the baffle plate 8, the other end of the air charging pipe 15 is connected with the air charging pump 14, and the air charging pump 14 is electrically connected with the controller 13. When the high liquid level detector detects that the liquid level in the cylinder 7 rises to the high liquid level line position, a signal is sent to the controller 13, the controller 13 closes a relay, the inflator pump 14 is started, and the inflation pipe 15 inflates the gas cavity of the cylinder 7; when the low liquid level detector detects that the liquid level in the cylinder 7 is reduced to the low liquid level line position, a signal is sent to the controller 13, the controller 13 turns off the relay, and the inflator pump 14 is turned off.
The sampling bottle 17 is communicated with the liquid cavity of the cylinder 7 through a sampling conduit 16, the sampling conduit 16 is a silica gel conduit, the tail end of the silica gel conduit sequentially penetrates through the baffle plate 8 and the liquid discharge piston 9 and stretches into the bottom of the liquid cavity of the cylinder 7 so as to collect a sample at the bottom of the cylinder into the sampling bottle 17, and the sampling conduit 16 is in seamless sealing connection with the baffle plate 8 and the sampling conduit 16 is in seamless sealing connection with the liquid discharge piston 9. The sampling bottle 17 is a brown sample bottle with a cover, the cover is provided with a number, the cover is a screwed cover with an opening, the cover comprises a silica gel spacer, and the bottle is filled with nitrogen at normal pressure in advance. The end of the sampling catheter 16 is provided with a liquid guide long needle, the liquid guide long needle extends into the bottle bottom of the sampling bottle 17, and an exhaust needle is inserted into the cover of the sampling bottle 17 to exhaust nitrogen outwards while filling liquid into the bottle.
Example 2: the method for collecting the soil leaching liquid.
The invention discloses a method for collecting soil leaching solution, which comprises the following steps:
1) The soil leaching liquid collecting device is arranged, and the liquid collecting section of the cylinder 7 is lower than the bottom end of the receiving disc 1.
2) The leaching solution which is received by the receiving disc 1 and is preliminarily filtered continuously enters the liquid cavity of the cylinder 7 through the connecting pipe 5, the liquid level gradually rises, the liquid draining piston 9 continuously moves upwards along with the increase of the leaching solution in the cylinder 7 (in the process, the volume of the liquid cavity gradually increases, and the volume of the gas cavity gradually decreases). At the same time as the drain piston 9 moves upward, the hard struts 18-3 in the exhaust pipe 18 push the exhaust piston 18-1 upward under the action of the drain piston 9.
3) When the liquid level in the cylinder 7 rises to the high liquid level line position, the high liquid level sensor 11 sends a signal to the controller 13, the controller 13 closes the relay, the inflator pump 14 is started, the gas cavity of the cylinder 7 is inflated through the inflator pipe 15, the liquid discharging piston 9 starts to move downwards after receiving the gas pressure (the volume of the process gas cavity is gradually increased, the volume of the liquid cavity is gradually reduced), and pressure is applied to the leaching liquid below the liquid discharging piston 9, so that the leaching liquid is pressed into the sampling guide pipe 16 (the leaching liquid cannot return to the receiving disc 1 due to the one-way valve 6 arranged on the connecting pipe 5 and can only enter the guide pipe), and then enters the sampling bottle 17, and the liquid level in the cylinder 7 gradually drops. At the same time as the drain piston 9 moves down, the hard strut 18-3 drives the vent piston 18-1 to move down.
4) When the liquid level in the cylinder 7 drops to the low level line position, the low level sensor 10 sends a signal to the controller 13, the controller 13 opens the relay, and the inflator 14 is closed. At this time, the exhaust piston 18-1 moves down to the expansion portion 18-2, the gas in the gas chamber of the cylinder 7 starts to be discharged from the gap between the exhaust piston 18-1 and the side wall of the expansion portion 18-2, the gas pressure at the upper portion of the discharge piston 9 decreases, moves up again (in this process, the liquid chamber volume gradually increases, and the gas chamber volume gradually decreases), and pushes the hard strut 18-3 and the exhaust piston 18-1 up until the exhaust piston 18-1 passes over the expansion portion 18-2, and the exhaust process ends.
5) And (3) repeating the steps 2) to 4), so that the collection of the leachate under the anaerobic condition is realized.
Claims (8)
1. The soil leaching liquid collecting device is characterized by comprising a receiving tray for receiving leaching liquid, a liquid storage device communicated with the bottom of the receiving tray through a connecting pipe, a sampling bottle communicated with the bottom of the liquid storage device through a sampling conduit, an air charging device for charging air into the liquid storage device, an exhaust pipe for discharging air in the liquid storage device and a controller for controlling the air charging device;
the liquid storage device comprises a cylinder, a baffle plate arranged in the cylinder, a liquid discharge piston, a high liquid level sensor and a low liquid level sensor, wherein the high liquid level sensor and the low liquid level sensor are arranged on the side wall of the cylinder and used for monitoring the liquid level in the cylinder, the liquid discharge piston can reciprocate in the cylinder below the baffle plate to divide the cylinder into two parts, the upper part is a gas cavity, the lower part is a liquid cavity, the high liquid level sensor and the low liquid level sensor are respectively and electrically connected with the controller through wires, and the sampling guide pipe sequentially penetrates through the baffle plate and the liquid discharge piston and then stretches into the liquid cavity;
the exhaust pipe comprises a pipe body, an exhaust piston and a hard supporting rod, wherein the exhaust piston and the hard supporting rod are arranged in the pipe body, the bottom of the pipe body is inserted into the gas cavity, an expansion part is arranged on the pipe body, the exhaust piston is located above the expansion part and can slide back and forth in the pipe body, the upper end of the hard supporting rod is connected to the exhaust piston, and the lower end of the hard supporting rod is connected to the liquid draining piston.
2. The device for collecting the soil leaching liquid according to claim 1, wherein the receiving tray comprises a funnel-shaped tray body and a filter layer arranged on the tray body, the bottom end of the tray body is communicated with the bottom of the cylinder body through a connecting pipe, and a one-way valve which flows to the cylinder body is arranged on the connecting pipe.
3. The apparatus according to claim 1, wherein the air charging device comprises an air charging tube and an air charging pump, one end of the air charging tube is connected with the air charging pump, the other end of the air charging tube extends into the air chamber, and the air charging pump is electrically connected with the controller.
4. The soil leaching solution collecting device according to claim 2, wherein the filter layer comprises a filter plate arranged at a disc opening of the disc body and a quartz sand layer arranged below the filter plate, and gauze meshes are respectively arranged on the upper surface and the lower surface of the quartz sand layer.
5. The method for collecting the soil leaching liquid is characterized by comprising the following steps of:
1) Providing the soil leaching solution collecting device of claim 1;
2) The leaching liquid received by the receiving disc flows into the liquid cavity of the cylinder body through the connecting pipe, and the liquid draining piston moves upwards along with the increase of the leaching liquid in the cylinder body;
3) When the liquid level of the leaching solution in the cylinder reaches the position of a high liquid level line, the high liquid level sensor sends a signal to the controller, the air charging device is started to charge air into the gas cavity of the cylinder, the liquid discharging piston is pressed to move downwards, leaching liquid below the liquid discharging piston is pressed into the sampling guide pipe, and then the liquid enters the sampling bottle, and the liquid level of the leaching solution in the cylinder gradually drops; the hard support rod drives the exhaust piston to move downwards while the liquid discharge piston moves downwards;
4) When the liquid level of the leachate in the cylinder body is reduced to a low liquid level line position, the low liquid level sensor sends a signal to the controller, the air charging device is closed, at the moment, the air discharging piston of the air discharging pipe moves down to the expansion part, air in the air cavity is discharged outside through a gap between the air discharging piston and the side wall of the expansion part, the air pressure above the air discharging piston is reduced, the air discharging piston moves upwards again, and the hard supporting rod and the air discharging piston are pushed to move upwards until the air discharging piston passes through the expansion part, and the air discharging process is finished;
5) And (3) repeating the steps 2) to 4), so that the collection of the leachate under the anaerobic condition is realized.
6. The method for collecting soil leaching liquor according to claim 5, wherein the receiving tray comprises a funnel-shaped tray body and a filter layer arranged on the tray body, the bottom end of the tray body is communicated with the bottom of the cylinder body through a connecting pipe, and a one-way valve for flowing to the cylinder body is arranged on the connecting pipe; the leachate is filtered by the filter layer and then flows into the liquid cavity of the cylinder body through the connecting pipe.
7. The method of claim 6, wherein the air charging device comprises an air charging pipe and an air charging pump, one end of the air charging pipe is connected with the air charging pump, the other end of the air charging pipe extends into the air cavity, and the air charging pump is electrically connected with the controller.
8. The method for collecting soil leaching liquid according to claim 6, wherein the filter layer comprises a filter plate arranged at a disc opening of the disc body and a quartz sand layer arranged below the filter plate, and gauze meshes are respectively arranged on the upper surface and the lower surface of the quartz sand layer.
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| CN201910190671.1A CN109975510B (en) | 2019-03-13 | 2019-03-13 | Soil leaching liquid collecting device and collecting method |
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| CN201910190671.1A CN109975510B (en) | 2019-03-13 | 2019-03-13 | Soil leaching liquid collecting device and collecting method |
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| CN109975510B true CN109975510B (en) | 2023-12-22 |
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| "Experimental evidence of colloids and nanoparticles presence from 25 waste leachates";Pierre Hennebert et al;《Waste Management》;第33卷(第9期);第1870-1881页 * |
| "三氯甲烷在浅层地下水中的赋存特征 及迁移淋溶性研究";李亚松等;《环境污染与防治》;第33卷(第7期);第36-39页 * |
| "城市污泥中氮磷在壤土和砂土中的淋溶实验研究";谭国栋等;《水资源与水工程学报》;第22卷(第2期);第82-86页 * |
| "膜孔灌灌施氯化铵条件下土壤氮素迁移分布规律研究";孙红等;《灌溉排水学报》(第6期);第114-116页 * |
| "设施菜地氮淋溶研究方法评价";姜玲玲等;《北方园艺》(第23期);第156-163页 * |
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| CN109975510A (en) | 2019-07-05 |
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