KR101866200B1 - Adsorbent for removal of H2S comprising mine drainage sludge and method for preparing the same - Google Patents
Adsorbent for removal of H2S comprising mine drainage sludge and method for preparing the same Download PDFInfo
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- KR101866200B1 KR101866200B1 KR1020170083197A KR20170083197A KR101866200B1 KR 101866200 B1 KR101866200 B1 KR 101866200B1 KR 1020170083197 A KR1020170083197 A KR 1020170083197A KR 20170083197 A KR20170083197 A KR 20170083197A KR 101866200 B1 KR101866200 B1 KR 101866200B1
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- mine drainage
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- hydrogen sulfide
- adsorbent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/20—Organic adsorbents
Abstract
The present invention relates to an adsorbent for removing hydrogen sulfide. The adsorbent is an adsorbent for removing hydrogen sulfide which contains mine drainage sludge. The adsorbent has a large amount of di- to trivalent metals or di- to trivalent quasi- The present invention provides an adsorbent for removing hydrogen sulfide using mine drainage sludge and a method for producing the same that can reduce the manufacturing cost in the production of the adsorbent and can remove hydrogen sulfide at room temperature, And to provide the use.
Description
Disclosed herein is an adsorbent for removing hydrogen sulfide containing mine drainage sludge and a method for producing the same.
Sewage sludge discharged from the first settling basin and the final settling basin is sent to the concentrator through piping, and the concentrated sludge, which is concentrated in the concentrator and is reduced in volume, is returned to the digester . The digester is a place where the organic matter contained in the sludge is decomposed to stabilize the sludge and reduce the volume. In the digester, digestion reaction occurs in which the organic matter is decomposed and removed by microorganisms. Meanwhile, in the process of decomposing organic matter by the digestion reaction, a digestion gas including methane, carbon dioxide, hydrogen sulfide and the like is generated. Methane contained in digestion gas can be used as a fuel. Accordingly, recently, digestion gas power generation that generates electricity using digestion gas is widely used. Power generation using digestion gas is regarded as alternative energy that is recyclable and environmentally friendly in terms of producing energy using sewage. However, when the extinguishing gas containing hydrogen sulfide is used as it is, hydrogen sulfide causes damage to the unit parts of the digesting gas generation facility, resulting in a decrease in power generation efficiency and an increase in facility maintenance cost.
In addition, Korea has a mixed population of residential area and industrial area for efficient use of the limited land, and the incidence of odor complaints is very high due to the high population density, and the kinds and sources of odorous substances are very diverse, . Food waste is discharged every day from households and restaurants. The amount of such garbage is gradually increasing from 13,672 tons / day in 2010 to 13,537 tons / day in 2011 and 13,209 tons / day in 2012, It has a different composition and content, and its protein content is relatively high in terms of nutrient composition. It has a useful value as feed and compost, but it has a high water content and is easily corrupted and malodorous. Therefore, when disposing of food waste, damage is increasing due to odor such as incessant complaints around environment basic facility due to odor generated.
Therefore, a fire extinguishing process is required to remove the hydrogen sulfide from the extinguishing gas before the fire extinguishing gas and odor removal facility is required.
In the past, it was packed in an adsorption tower by using an iron oxide adsorbent, an activated carbon iron oxide modification, and the like. However, these technologies are costly, and they cause heavy equipment costs and increase in energy production costs. Therefore, it is necessary to develop an adsorbent that maintains the efficiency of the conventional adsorbent and does not incur an economical cost.
One aspect of the present invention is to provide an adsorbent for removing hydrogen sulfide using a mine drainage sludge containing a large amount of divalent to trivalent metals or divalent to trivalent metals excellent in adsorption of hydrogen sulfide and a method for producing the same.
One aspect of the present invention provides an adsorbent for removing hydrogen sulfide and a method for producing the same by using a mine drain sludge containing a large amount of iron oxide compounds excellent in adsorption of hydrogen sulfide, thereby achieving economical efficiency by reducing the manufacturing cost and removing hydrogen sulfide at room temperature Thereby providing an economical and environmentally friendly use of digestion gas.
Another aspect of the present invention is to provide a method for producing an adsorbent for removing hydrogen sulfide containing mine drainage sludge.
Another aspect of the present invention is to provide a method for removing hydrogen sulfide in a digestion gas of a food waste using an adsorbent for removing hydrogen sulfide according to an aspect of the present invention.
One aspect of the present invention provides an adsorbent for removing hydrogen sulfide, wherein the adsorbent comprises mine drainage sludge.
In one aspect of the invention, the mine drainage sludge is an acidic mine drainage sludge.
In one aspect of the present invention, the acidic mine drainage sludge is an acidic mine drainage sludge generated by the oxidation of pyrite.
In one aspect of the present invention, the acidic mine drainage sludge provides sludge, which is generated in mines mined from coal.
In one aspect of the present invention, the acid mine drainage sludge provides an adsorbent, which is sludge originating from the Shimta mine.
In one aspect of the present invention, the mine drainage sludge is a dried mine drainage sludge, wherein the content of the bivalent to ternary metal or the bivalent to trivalent metal element in the mine drainage sludge is greater than the total weight of the mine drainage sludge dried Wherein the metal or metalloid element is at least one of Si, Fe, Ca, Mn and Mo.
In one aspect of the present invention, the content of the metal or metalloid element is determined by analyzing the dried mine drainage sludge by X-ray fluorescence spectrometry (XRF) %, ≪ / RTI >
In one aspect of the present invention, the adsorbent is provided that the metal or metalloid element is Fe.
In one aspect of the present invention, the mine drainage sludge is a sludge containing at least 80 wt% Fe element based on the total weight of the dried mine drainage sludge.
In one aspect of the invention, the hydrogen sulphide is hydrogen sulphide, which is contained in the digestion gas of food waste or sewage sludge.
In one aspect of the present invention, the Fe element is contained in mine drainage sludge in the form of one or more of iron oxide and iron sulphide.
According to another aspect of the present invention, there is provided a method for producing an adsorbent for removing hydrogen sulfide according to any one of the above adsorbents for removing hydrogen sulfide, the method comprising the step of recovering a mine drainage sludge do.
In another aspect of the present invention, the production method further comprises a step of recovering and drying the sludge, and a method for producing the adsorbent for removing hydrogen sulfide.
Yet another aspect of the present invention provides a hydrogen sulphide removal method for removing hydrogen sulphide using an adsorbent for removing hydrogen sulphide according to any one of the adsorbents for removing hydrogen sulphide.
In another aspect of the present invention, there is provided a method for removing hydrogen sulfide, wherein the hydrogen sulfide is hydrogen sulfide contained in digestion gas of food waste or sewage sludge.
The adsorbent for removing hydrogen sulfide according to one aspect of the present invention can adsorb the hydrogen sulfide generated in the digestion anaerobic reaction effectively and economically by preparing a new adsorbent containing mine drainage sludge.
The adsorbent for removing hydrogen sulfide according to one aspect of the present invention is environmentally friendly in terms of reusing the waste generated in mining.
The adsorbent for removing hydrogen sulfide according to one aspect of the present invention is economical because only the transportation cost is incurred in terms of cost in terms of reusing the waste generated in mining.
The adsorbent for removing hydrogen sulfide according to one aspect of the present invention can reuse the material to be treated as waste in view of the cost of reusing the waste generated in mining, .
The method according to another aspect of the present invention is economical because it is possible to maintain the existing equipment in the form of simply replacing the adsorbent with the adsorbent manufactured according to one aspect of the present invention without changing the structure and design of existing facilities in the hydrogen sulfide removal.
The method according to another aspect of the present invention is advantageous in that it is possible to dispose of the adsorbent after one use without requiring the reuse of the adsorbent, and the economical cost for reuse does not occur.
1 is an XRD graph of Experimental Example 1 of the present invention.
Fig. 2 shows the adsorption amounts of hydrogen sulfide adsorption amounts of Example 1 and Comparative Examples 1 to 5 at a hydrogen sulfide concentration of 100 ppm in Experimental Example 2 of the present invention.
3 is a graph showing the change in adsorption amount with respect to the flow amount in Experimental Example 3 of the present invention.
4 to 5 are photographs of the acid mine drainage sludge recovered and dried in Example 1 of the present invention and photographs of the solid matter.
One aspect of the present invention relates to an adsorbent for removing hydrogen sulfide using an acidic mine drainage sludge used to remove hydrogen sulfide contained in digested gas generated in a sewage sludge disposal process.
The sorbent according to one aspect of the present invention can be used as a hydrogen sulphide sorbent by drying sludge-treated acidic mine drainage (including heavy metals) containing high levels of iron produced in the mine after the mining activity.
The adsorbent according to one aspect of the present invention is a material containing a large amount of iron oxide used for removing hydrogen sulfide contained in the digestion gas and can be used as an adsorbent without any additional economic cost, It is possible to produce an effect of efficient energy production.
Hereinafter, the present invention will be described in detail.
One aspect of the present invention provides an adsorbent for removing hydrogen sulfide, wherein the adsorbent comprises mine drainage sludge.
As used herein, the term "mine drain sludge" is a sludge that occurs after the process for controlling pH in the water exiting the mine of a mine containing a large amount of Fe. Specifically mine drainage. When the mine is abandoned, groundwater flows into the mine and reacts with sulfide minerals present in the mine to contain a large amount of Fe, which is called mine drainage. When the mine drainage contains a large amount of Fe and the pH is low, it is called an acid mine drainage. Also, in one embodiment, the mine drainage sludge may be a sludge generated through a process of raising the pH using a lime slurry or the like, or a process of raising the pH using an alkali supply maintenance facility to remove iron in mine drainage.
In one aspect of the invention, the mine drainage sludge can be a mine drainage sludge, comprising a precipitate that precipitates acidic mine drainage through slurry and alkali feed.
In one aspect of the present invention, the mine drainage sludge is an acidic mine drainage sludge having a pH of less than 7. Specifically, the acid mine drainage sludge has a pH of less than 7, a pH of less than 6.9, a pH of less than 6.7, a pH of less than 6.5, a pH of less than 6.3, a pH of less than 6.1, a pH of 5.9 or less, a pH of 5.7 or less, 5.1 or less, pH 4.9 or less, pH 4.7 or less, pH 4.5 or less, pH 4.3 or less, pH 4.1 or less, pH 3.9 or less, or pH 3.5 or less.
In one aspect of the invention, the acidic mine drainage sludge is an acidic mine drainage sludge generated by the oxidation of the sulfide mineral. In one embodiment, the sulfide mineral may be pyrite. In general, acidic mine drainage is often produced by oxidation of sulfide minerals, which can be created by exposure to oxygen as a result of mining activity. The sulfide mineral may comprise pyrite.
In one aspect of the present invention, the acidic mine drainage sludge provides sludge, which is generated in mines mined from coal.
In one aspect of the present invention, the acid mine drainage sludge provides an adsorbent, which is sludge originating from the Shimta mine.
In one aspect of the invention, the hydrogen sulphide is hydrogen sulphide, which is contained in the digestion gas of food waste or sewage sludge.
In one aspect of the invention, the mine drainage sludge may be in a dried form. The mine drainage sludge can be completely dried using an oven or the like.
In one aspect of the invention, the mine drainage sludge may be in a solid form after drying. In one embodiment, the solidification is performed by mixing dry cement, sand, and mine drainage sludge at a ratio of 1: 1: 1 in a fully dried (105 ° C, 24hr dry) After the addition of the amount, the mixture is kneaded and solidified using a petri dish molding machine (injection type).
In one aspect of the present invention, the mine drainage sludge is a dried mine drainage sludge, wherein the content of the bivalent to ternary metal or the bivalent to trivalent metal element in the mine drainage sludge is greater than the total weight of the mine drainage sludge dried Wherein the metal or metalloid element is at least one of Si (silicon), Fe (iron), Ca (calcium), Mn (manganese), and Mo (molybdenum).
In one aspect of the present invention, the content of the metal or metalloid element is determined by analyzing the dried mine drainage sludge by X-ray fluorescence spectrometry (XRF) By weight, based on the total weight of the adsorbent.
In one aspect of the present invention, the content of the metal or metalloid element is at least 30% by weight, at least 40% by weight, at least 50% by weight, at least 60% by weight, at least 70% by weight based on the total weight of the dried mine drainage sludge At least 73 wt%, at least 76 wt%, at least 78 wt%, at least 79 wt%, at least 80 wt%, at least 81 wt%, at least 82 wt%, at least 83 wt%, at least 85 wt% , At least 90 wt%, at least 92 wt%, at least 95 wt%, or at least 98 wt%. When the content of the metal or metalloid element in the dried mine drainage sludge is within the above range, an excellent hydrogen sulfide adsorption effect can be shown.
In one aspect of the present invention, the metal or metalloid element is at least one of Fe, Mg, Ca and Si.
In one aspect of the present invention, the adsorbent is provided that the metal or metalloid element is Fe.
In one aspect of the present invention, the mine drainage sludge is a sludge containing at least 80 wt% Fe element based on the total weight of the dried mine drainage sludge. Specifically, the mine drainage sludge contains 80 wt% or more, 80.5 wt% or more, 81 wt% or more, 81.5 wt% or more, 82 wt% or more, or 82.5 wt% or more of Fe element based on the total weight of the dried photoperiodic sludge can do.
In one aspect of the invention, the hydrogen sulphide is hydrogen sulphide, which is contained in the digestion gas of food waste or sewage sludge.
In one aspect of the present invention, the Fe element is contained in mine drainage sludge in the form of one or more of iron oxide and iron sulphide.
According to another aspect of the present invention, there is provided a method for producing an adsorbent for removing hydrogen sulfide according to any one of the above adsorbents for removing hydrogen sulfide, the method comprising the step of recovering a mine drainage sludge do.
In another aspect of the present invention, the production method further comprises a step of recovering and drying the sludge, and a method for producing the adsorbent for removing hydrogen sulfide.
In another aspect of the present invention, the method further comprises solidifying the dried mine drainage sludge, wherein the method further comprises solidifying the dried mine drainage sludge.
In another aspect of the present invention, the manufacturing method may further include a step of adjusting the particle size to improve the performance of the adsorbent.
Yet another aspect of the present invention provides a hydrogen sulphide removal method for removing hydrogen sulphide using an adsorbent for removing hydrogen sulphide according to any one of the adsorbents for removing hydrogen sulphide.
In another aspect of the present invention, there is provided a method for removing hydrogen sulfide, wherein the hydrogen sulfide is hydrogen sulfide contained in digestion gas of food waste or sewage sludge.
Yet another aspect of the present invention provides a method for removing hydrogen sulfide in a digestion gas of food waste using the adsorbent for removing hydrogen sulfide.
Yet another aspect of the present invention provides a method for removing hydrogen sulfide in digested gas of sewage sludge using the adsorbent for removing hydrogen sulfide.
In another aspect of the present invention, the hydrogen sulfide removing method can be carried out at room temperature.
In another aspect of the present invention, there is provided a method for removing hydrogen sulfide wherein the adsorbent for removing hydrogen sulfide is used once.
Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are only for illustrating the present invention and that the scope of the present invention is not construed as being limited by these embodiments.
Example 1: Acid mine drainage Sludge Preparation of adsorbent
The sludge from the mine drainage sludge was collected and transferred to the laboratory. The sludge was dried at 105 ° C for 24 hours in a dry oven, completely dried, and then mine drainage sludge was prepared using a 100-mesh sieve. The mine drainage sludge was as shown in Fig. Using this method, sand and cement were prepared by drying in the same manner. 100 g of mine drain sludge 100 g of sand 100 g of cement were prepared and mixed in a dry state. 100 g of water was added to prepare a mixed dough, and then a solid material including mine drainage sludge was prepared using a pelletizer (injection type) 5). After that, it was used as an adsorbent for adsorbing hydrogen sulfide after curing for 1 week while maintaining a relative humidity of 100%.
Comparative Example 1 to 5
As the comparative example 1, Fe modified zeolite was used. The zeolite was modified at the Junsei company after the purchase.
As Comparative Example 3, a silica gel (Aldrich) known as a hydrogen sulfide adsorbent was used.
In Comparative Example 4, a sand (Jumoonjin slica sand) known as a hydrogen sulfide adsorbent was used.
In Comparative Example 5, an iron-coated sand known as a hydrogen sulfide adsorbent was used. The sand was purchased from Jumoonjin slica sand and modified with Fe.
Experimental Example One : Acid mine drainage sludge Character analysis
The samples of dried and sieved in Example 1 were analyzed by X-ray diffraction (XRD) and X-ray fluorescence analysis (XRF) to determine the content of iron and the shape of the mineral to serve as adsorbing hydrogen sulphide.
The results of XRF analysis were as shown in Table 1 and the results of XRD analysis were as shown in FIG. As a result, many iron oxide minerals were found and iron content was about 82.8%.
Experimental Example 2: Adsorption experiment of hydrogen sulfide
In order to demonstrate the efficiency of adsorbing hydrogen sulfide of the adsorbent for removing hydrogen sulfide according to the present invention,
The adsorption amount of hydrogen sulfide was tested using the acidic mine drain sludge prepared in Example 1. The adsorption experiment was designed to control the flow rate using a mass flow meter (MFC) after injecting the adsorbent (1 g) of Example 1 of the present invention to be tested into a circular column of 11.7 cm 3 ( diameter 1 cm height 15 cm) After that, the prepared column was mixed with 99.99% purity nitrogen so that the concentration of H 2 S gas became about 100 ppm, continuously injected into the column at 50 ml / min, and then adsorbed at room temperature. The adsorption time was analyzed continuously (2 seconds) using a gas analyzer (Testo 350K, Germany) at the outlets of the column, and the adsorption proceeded while the adsorption was detected at 0.1 ppm (breakthrough time). As a control group, the adsorption amount of hydrogen sulfide was measured in the same manner as in the above-mentioned test method using the above Comparative Examples 1 to 5.
The experimental results are shown in Fig. The adsorbent of Example 1 continued to adsorb for 3 days in comparison with the break through time of
Experimental Example 3: Experiments on adsorption of hydrogen sulfide at high concentration according to flow rate
A high concentration of hydrogen sulfide adsorption experiment was carried out using the acidic mine drainage sludge prepared in Example 1. The adsorption experiment was designed to control the flow rate of hydrogen sulfide using a flow meter after injecting the adsorbent (1 g of AMDs) of Example 1 into an 11.7 cm 3 column. The H 2 S gas of high concentration (1,000ppm) was mixed with 99.9% purity nitrogen in the prepared column, and the reaction was repeated until the breakthrough time reached at various flow rates (0.5 L / min, 1 L / min, 2 L / min) . The concentration of hydrogen sulfide passing through the column was measured using a gas analyzer.
The experimental results are shown in Fig. Experimental results showed that the acidic mine drainage sludge of Example 1 had an adsorption capacity of 99% even at a high flow rate and a high concentration of hydrogen sulfide.
Claims (10)
Wherein the mine drainage sludge is dried mine drainage sludge and the content of the binary to ternary metal or the di- to ternary metal element in the mine drainage sludge is at least 30% by weight based on the total weight of the dried mine drainage sludge,
Wherein the metal or metalloid element comprises at least one of Fe, Ca and Si.
Wherein the mine drainage sludge is an acid mine drainage sludge.
Wherein the acid mine drainage sludge is sludge generated from acidic mine drainage produced by oxidation of the sulfide minerals.
Wherein the content of the metal or metalloid element is 30% or more based on the total weight of the dried mine drainage sludge when analyzed by X-ray fluorescence spectrometry (XRF).
Wherein the method further comprises recovering and drying the sludge.
Wherein the hydrogen sulfide is hydrogen sulfide contained in digestion gas of food waste or sewage sludge.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200059972A (en) * | 2018-11-22 | 2020-05-29 | 한국과학기술연구원 | Adsorbent for removing ammonia comprising acid mine drainage sludge and alginate, method for producing the same, and method for removing ammonia using the same |
| KR102283099B1 (en) * | 2020-11-30 | 2021-07-29 | 한국광해관리공단 | Method for manufacturing brick using mine drainage sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101281283B1 (en) | 2006-12-21 | 2013-07-03 | 주식회사 포스코 | Preparation of activated carbon catalyst for hydrogen sulfide removal |
| KR101344236B1 (en) * | 2013-02-18 | 2014-01-07 | 전북대학교산학협력단 | Adsorbent for eliminating harmful ions using iron-loaded sludge and method for producing the same |
| KR20160053293A (en) * | 2014-11-03 | 2016-05-13 | 한국지질자원연구원 | Method and System for separating useful metals from mine drainage using hydrogen sulfide gas |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101281283B1 (en) | 2006-12-21 | 2013-07-03 | 주식회사 포스코 | Preparation of activated carbon catalyst for hydrogen sulfide removal |
| KR101344236B1 (en) * | 2013-02-18 | 2014-01-07 | 전북대학교산학협력단 | Adsorbent for eliminating harmful ions using iron-loaded sludge and method for producing the same |
| KR20160053293A (en) * | 2014-11-03 | 2016-05-13 | 한국지질자원연구원 | Method and System for separating useful metals from mine drainage using hydrogen sulfide gas |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20200059972A (en) * | 2018-11-22 | 2020-05-29 | 한국과학기술연구원 | Adsorbent for removing ammonia comprising acid mine drainage sludge and alginate, method for producing the same, and method for removing ammonia using the same |
| KR102268809B1 (en) * | 2018-11-22 | 2021-06-25 | 한국과학기술연구원 | Adsorbent for removing ammonia comprising acid mine drainage sludge and alginate, method for producing the same, and method for removing ammonia using the same |
| KR102283099B1 (en) * | 2020-11-30 | 2021-07-29 | 한국광해관리공단 | Method for manufacturing brick using mine drainage sludge |
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