[0028] Hereinafter, the present invention will be described in detail with reference to the drawings, however, the following specific embodiments are intended to fully convey the inventive concepts and do not limit the scope of the invention. The scope of the invention is defined by the appended claims and their equivalents.
[0029] A large amount of sludge will occur during sewage treatment. The sludge is composed of a plurality of microorganisms formed from the organic and inorganic substances and water thereof, including a large amount of heavy metals. In order to make full use of sludge, it is necessary to remove heavy metals included in the sludge. To achieve this, the inventive concept is mainly to achieve high-efficiency and low cost of the sludge in the sludge treatment agents of the iron-carbon filler load layer-shaped bimetallic oxide.
[0030] The sludge treatment agent according to the inventive concept can be obtained by providing an iron carbon filler, a load layer bimetallic hydroxide, and a method of producing a firing treatment. figure 1 A flow chart of a method of preparing a sludge treatment agent according to the present invention is shown. Hereinafter, a method of preparing a sludge treatment agent according to the inventive concept will be described in detail.
[0031] Iron carbon filler
[0032] The iron carbon filler according to the inventive concept may include iron carbon fillers used in the iron microelectronic solutions treated with wastewater treatment. Here, the iron-carbon microelectrolysis is the pre-treatment process of the sewage treatment, which is electrolytic treatment of the liquid-free material for the wastewater by using iron carbon filler itself in the absence of electricity, which is electrolysis to the wastewater to achieve a degraded organic contaminant. the goal of. Therefore, the iron carbon filler can include, but is not limited to, iron films and charcoal, etc., and the inventive concept is not limited to the ratio between the ingredients and components of the iron carbon filler, and those skilled in the art can be based on the present invention based on the prior art Iron carbon filler of inventive concept.
[0033] Further, when the iron carbon filler is used for sewage treatment, due to its performance, the performance of its performance, it may be used to reduce the wastewater treatment due to no longer have the ability to treat sewage treatment or the ability to treat sewage, thereby The iron-carbon filler after sewage treatment no longer has any use value in the prior art. However, the inventive concept can make full use of iron-carbon fillers after sewage treatment, so that the resource utilization of waste can be realized in the case of high-efficiency heavy metals in sludge, and reduces the treatment of sludge, thereby significantly reduced production cost. However, the inventive concept is not limited thereto. That is, the inventive concept can use iron carbon fillers in any form before and / or use in the sewage treatment process in the prior art.
[0034] According to the concept of the present invention, when the iron carbon filler is selected, the iron carbon filler can be broken. Here, the purpose of breaking is mainly in order to increase the contact area of the iron-carbon filler and the sludge, and increase the contact area when the load layer double metal hydroxide (LDH) involved in the rear step is increased, thereby increasing the heavy metal. Remove efficiency. When it is loaded with a layer-shaped bimetallic oxide (LDO) (obtained after a layered bimetallic hydroxide, it will be described later, it will be added to the sludge, iron with large specific surface area The carbon filler can be sufficiently contacted with sludge to utilize its own chemical reduction to reduce the resentless heavy metals in sludge into a low-cost state and convert to a prococent material, thereby reducing the toxicity of heavy metals; at the same time, through iron The large specific surface area of the carbon filler is largely loaded in the layer-shaped bimetallic oxide on the surface of the iron carbon filler, can be adsorbed by iron carbon fillers, and the sludge is removed from the heavy metal.
[0035] Therefore, according to an exemplary embodiment of the concept of the present invention, the iron carbon filler can be broken into a particle size of 5 cm to 10 cm, but the inventive concept is not limited to the particle size of the iron carbon filler.
[0036] Led layer double metal hydroxide
[0037] After the iron carbon filler is provided, the layered bimetallic hydroxide can be loaded on the iron carbon filler.
[0038] The layered bimetallic hydroxide (LDH) of the inventive concept is a class-like compound composed of a class-charged metal hydroxide and an interlayer with a positively charged metal hydroxide and an interlayer. The formula can be expressed as [M 2+ 1-x M 3+ x (OH) 2 ] x+ (A n- ) x/n YH 2 O, where M 2+ Represents divalent metal ions (for example, you can choose from MG) 2+ , CA 2+ SR 2 + BA 2+ , Zn 2+ Ni 2+ , Fe 2+ Cu 2+ , CO 2+ Mn 2+ One or more of the composition of the group, usually available for NI 2+ , CO 2+ , Zn 2+Mg 2+ Mn 2+ Wait), M 3+ Represents trivalent metal ions (for example, you can choose from Al 3+ , Cr 3+ , Fe 3+ , V 3+ , CO 3+ , GA 3+ , Ti 3+ One or more of the composition of the group, can be used for Al 3+ , Fe 3+ , Ti 3+ Wait), 0.2 ≤ x ≤ 0.4, 0 ≤ y ≤ 2, a n- Representing an ion (eg, can be selected from CO) 3 2- NO 3 - SO 4 2- Po 4 3- , CL - One or more of the composition of the group, commonly used can be CO 3 2- NO 3 - ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Here, the layered bimetallic hydroxide in the exemplary embodiment of the inventive concept can include hydrotalcous and water talc.
[0039] Typical composition of Hydrotalcite (HT) can be MG 6 Al 2 (OH) 16 CO 3 · 4h 2 O, the water tide has similar to magnesium stone (Mg (OH) 2 , brucite's positive octa-body structure, magnesium stone octahedral in mg 2+ Center, OH - For the vertices, adjacent octafas form layered compounds by shared edges, layers and layers, and the interlayer is combined by electrostatic gravity and hydrogen bonding. When the layer is in a portion of the radius, it is substituted with a crystallization, resulting in the accumulation of the charge of the layer, and the layer is CO 3 2- The like is separated and the charge balance is reached, and the interlayer water exists in the form of crystal water, so that the layered structure of the water tide, such as figure 1 Indicated in it. in figure 1 In the middle, a represents a magnesium stone type plate layer, the B surface layer channel height, and C represents the interlayer region (there is an anion and water molecules in the region).
[0040] When the metal cation in the water talc layer is different from the other radius, the metal cationic portion or all co-alimentary substitution or the anion of the interlayer is referred to as a water slide (Hydrotalcite-Like). HTLCS, its chemical formula can be: [M 1-x 2+ M x 3+ (OH) 2 ] x+ A x/n n- · MH 2 O, where X is M 3+ / (M 2+ + M 3+ The molar ratio can be 0.22-0.33, which can only obtain a mixture of water slide and other compounds by X> 0.337; when 0.15 < 0.201 When the product is a magnesium stone (4mgco 3 · MG (OH) 2 · 4h 2 O); When x <0.15, the mixture of magnesium stone and magnesium hydroxide is generated), and M is the mole of the crystalline water, M 2+ , M 3+ Divalent, trivalent metal cations, occupy the center of the composite hydroxide octahedron structure, respectively, of the laminate (eg Mg) 2+ , Zn 2+ Cu 2+ , CO 2+ , Fe 2+ Ni 2+ , Al 3+ , Fe 3+ , CA 3+ , Cr 3+ Mn 3+ Wait, the secondary price of these radii, divalent metal cations can be synthesized in a variety of binary, ternary, four or even five-class water talc htlcs, A n- For different price of interlayer anions (for example, CL - , I - NO 3 - , CLO 4 - , CO 3 2- SO 4 2- , CRO 4 2- Waiting in inorganic anion, (V 10 O 28 ) 6- (Mo 7 O 24 ) 6- (PMO 12 O 40 ) 3- Multiopolytic metal ions and organic acid metal complexes, etc. Further, another water-slip stone compound can be obtained by introducing a large amount of anionic group (such as an organic anion or the like), which is a hydrotree compound, which is also known as the insertion hydrotalcite.
[0041] Due to the layered nature of the layered bimetallic hydroxide, after calculating it, it can lose the interlayer crystalline water and interlayer anion, thereby forming a layered bimetallic oxide (LDO) having an unstable state. Layered bimetallic oxides may have a large specific surface area and good adsorption properties, which can synergistically adsorb heavy metals in the sludge in the ferrous filler when the load is loaded on a ferrous filler.
[0042] In order to carry the layered bimetallic hydroxide load on the iron carbon filler, iron carbon filler can be added to the reactor forming a layered bimetallic hydroxide before or during the formation of a layered bimetallic hydroxide, so that iron carbon The filler can be formed into a layered bimetallic hydroxide. Through this method, the load layer double metal hydroxide can secure the layered bimetallic hydroxide (or the layered bimetal oxide formed after baked), which is attached to the iron carbon filler without being detached. It is conducive to the removal of heavy metals in sludge. According to a specific example, the preparation method of the layered bimetallic hydroxide may include a common precipitation method, a hydrothermal synthesis, and the like, but is not limited thereto, that is, in accordance with the inventive concept, a layered double metal is attached to the iron carbon filler. The method of hydroxide is not limited thereto.
