CN115193400A - Natural siderite-sludge-based composite material and preparation method and application thereof - Google Patents

Natural siderite-sludge-based composite material and preparation method and application thereof Download PDF

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CN115193400A
CN115193400A CN202210633097.4A CN202210633097A CN115193400A CN 115193400 A CN115193400 A CN 115193400A CN 202210633097 A CN202210633097 A CN 202210633097A CN 115193400 A CN115193400 A CN 115193400A
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composite material
sludge
siderite
natural
powder
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杨康
罗宿星
杨发念
程俊伟
伍远辉
何嘉密
沈荣平
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Zunyi Normal University
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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
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • 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
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • 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
    • B01J20/3021—Milling, crushing or grinding
    • 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
    • B01J20/3071—Washing or leaching
    • 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
    • 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
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • 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
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48—Sorbents characterised by the starting material used for their preparation
    • B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
    • B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
    • 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
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]

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  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Water Treatment By Sorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The invention relates to the technical field of sewage treatment, in particular to a natural siderite-sludge based composite material and a preparation method and application thereof, which are characterized in that natural siderite and excess sludge of a sewage treatment plant are used as raw materials, the raw materials are respectively pretreated to prepare sludge powder and siderite powder, the raw materials are pyrolyzed in one step to prepare a crude composite material, and the crude composite material is activated to prepare the composite material, wherein the surface of the composite material is provided with a large number of functional groups, such as: fe-OH, C = O, -OH and the like, which is beneficial to reducing organic matters in the sewage and leading the COD removal rate to reach more than 60 percent, and the preparation process flow is simple, the raw materials are easy to obtain and the cost is low.

Description

Natural siderite-sludge-based composite material and preparation method and application thereof
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a natural siderite-sludge based composite material and a preparation method and application thereof.
Background
The natural siderite resource has a large reserve of about 10 hundred million tons in China, and the natural siderite is already applied to the field of water pollution treatment, and the effects of surface adsorption, pore channel filtration, ion exchange, chemical activity and the like of the natural siderite are fully utilized, but when the natural siderite is applied to the field of sewage treatment, the sewage treatment requirement can be met only by modifying the natural siderite due to the fact that the natural siderite has weak activity and low adsorption efficiency. For example: patent application numbers 201910326682.8, 201910123257.9, 201710371963.6 and the like disclose that siderite and sulfur are mixed to prepare a composite material, so that the purpose of deeply removing pollutants such as nitrogen and phosphorus in sewage is achieved.
The sludge is a byproduct of a sewage treatment plant and contains a large amount of organic matters, the pyrolysis preparation of the sludge biochar has received extensive attention and research, and the converted sludge biochar is used as an adsorbent and a catalyst for treating wastewater, but in the prior art, the sludge biochar has poor adsorption performance and is difficult to recycle, and the requirement of treating wastewater with high-concentration COD content is difficult to meet.
However, the research on the preparation of the sewage treatment composite material by compounding natural siderite and sludge is relatively rare, and the research on the reduction of the water content in the sludge by using siderite as a raw material for treating the sludge is conducted, for example: patent application No. 201910876847.9 discloses that after ultrasonic treatment is carried out on sludge, siderite and other components are added, and after reaction for a certain time, dehydration is carried out under an electric field, so that under the action of siderite, the sludge structure is broken, and the purpose of reducing the water content of the sludge is achieved. Meanwhile, iron cations in the natural siderite can combine with carboxyl to form a surface functional group: fe-OH, which associates and dissociates through protons, making it positively charged, whereas sludge extracellular polymers contain abundant functional groups, such as: carboxyl, phosphate group, sulfonic group and the like, so that the surface of the sludge is negatively charged, and the carboxyl, the phosphate group, the sulfonic group and the like can be combined with each other to act, thereby being beneficial to the preparation of the material in the next step.
Therefore, the group of researchers combines practice research and theoretical study research aiming at sewage treatment for a long time, and uses natural siderite and sludge from sewage treatment plants as raw materials to prepare the composite material for sewage treatment, thereby providing a new material for the field of sewage treatment.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a natural siderite-sludge based composite material, and a preparation method and application thereof.
The method is realized by the following technical scheme:
one of the purposes of the invention is to provide a preparation method of a natural siderite-sludge based composite material, which comprises the following steps:
(1) Pretreating sludge to prepare sludge powder;
(2) Preparing the siderite ore powder by ball milling of natural siderite;
(3) Mixing the sludge powder and the siderite powder according to a mass ratio of 3-7:1, feeding into a tubular furnace, heating to 500-600 ℃, keeping the temperature for 2-8h, naturally cooling, washing with water and drying to obtain a crude composite material; the heating rate of the heating is 5-10 ℃/min;
(4) And activating the coarse composite material to prepare the composite material.
The method comprises the steps of respectively pretreating natural siderite and excess sludge of a sewage treatment plant to prepare sludge powder and siderite powder, performing one-step pyrolysis to prepare a crude composite material, and performing activation treatment to prepare the composite material, wherein the surface of the composite material is provided with a large number of functional groups, such as: fe-OH, C = O, -OH and the like, which is beneficial to reducing organic matters in the sewage and leading the COD removal rate to reach more than 60 percent, and the preparation process flow is simple, the raw materials are easy to obtain and the cost is low.
In order to greatly improve the removal rate of COD in sewage by the composite material, preferably, in the step (4), the crude composite material is dispersed in a KOH solution of 1mol/L, dried at 80 ℃ to constant weight and then ground into primary powder; and then feeding the primary powder into a tube furnace, heating to 500-600 ℃, keeping the temperature constant for 2-8h, naturally cooling, washing with water and drying to obtain the composite material. The heating rate of the heating is 5-10 ℃/min.
Preferably, the washing and drying are drying to constant weight.
Preferably, the mass ratio of the crude composite material to KOH in the KOH solution is 1.
In order to increase the number of pores and mesopores on the surface of sludge, further increase the specific surface area and improve the removal efficiency of pollutants in sewage, preferably, in the step (1), 0.5mol/L NaOH solution is adopted for residual sludge of a sewage treatment plant, the mixture is mixed according to the mass ratio of the sludge to the NaOH being 1, the mixture is sent into an ultrasonic processor, ultrasonic treatment with the frequency of 59kHz is adopted for 3min, the mixture is dried to constant weight at 105 ℃, and is ground and sieved by a 80-mesh sieve, so that sludge powder is obtained.
Preferably, in the step (2), the natural siderite is crushed by a ball mill, sieved by a 200-mesh sieve, washed by water and dried to constant weight, so as to obtain the siderite powder.
The invention also aims to provide the natural siderite-sludge based composite material obtained by the method.
The invention also aims to provide the application of the natural siderite-sludge based composite material obtained by the method in treating high-concentration COD wastewater or in preparing a high-concentration COD wastewater treatment preparation. The COD concentration in the high-concentration COD wastewater is more than 30000mg/L. The high-concentration COD wastewater is brewing wastewater of a Maotai-flavor winery.
Compared with the prior art, the invention has the technical effects that:
the invention has simple process flow, utilizes the excess sludge of the sewage treatment plant as the raw material, not only reduces the cost, but also realizes the change of waste into valuable, achieves the resource utilization of the sludge, and selects the natural siderite to combine with the modification treatment to prepare the composite material, so that the composite material has excellent adsorption performance, fully utilizes the excellent adsorption performance of the biological carbon prepared by the pyrolysis of the sludge and the strong alkalinity and abundant types of surface functional groups of the natural siderite, realizes the mutual synergistic modification of the natural siderite and the sludge, and enhances and promotes the removal capability of the composite material to COD in the sewage.
The composite material can treat sewage with COD concentration of over 30000mg/L, so that the COD removal rate reaches over 60 percent, and the sewage treatment cost is greatly reduced.
Drawings
FIG. 1 is a flow chart of the inventive process.
FIG. 2 is an electron microscope scanning image of the composite material of the present invention.
Figure 3 is a diagram of the inventive composite EDS.
FIG. 4 is a nitrogen adsorption-desorption drawing of the composite material of the present invention.
FIG. 5 is a COD-t relationship diagram of the composite material of the present invention for wastewater treatment.
FIG. 6 is a comparison of the images before and after the wastewater treatment in the laboratory according to the invention.
Detailed Description
The technical solution of the present invention is further defined in the following description with reference to the accompanying drawings and the specific embodiments, but the scope of the claimed invention is not limited to the description.
As shown in fig. 1, in this example, the method for preparing the natural siderite-sludge based composite material includes the steps of:
(1) Pretreating sludge to prepare sludge powder;
(2) Preparing the siderite ore powder by ball milling of natural siderite;
(3) Mixing sludge powder and siderite powder according to a mass ratio of 3-7, for example: 3: the constant temperature of 500 ℃,550 ℃,580 ℃,600 ℃ and the like is 2-8h, for example: 2h,4h,5h,6h,7h,8h and the like, naturally cooling to normal temperature, washing with water and drying to constant weight to obtain a crude composite material; the heating rate of the heating is 5-10 ℃/min, for example: 5 ℃/min,6 ℃/min,7 ℃/min,8 ℃/min,9 ℃/min, 10 ℃/min, etc.;
(4) And activating the coarse composite material to prepare the composite material.
In this example, the step (4) is to disperse the crude composite material in a 1mol/L KOH solution, dry the mixture at 80 ℃ to a constant weight, and then grind the mixture into a primary powder; the primary powder is then fed into a tube furnace and heated to a temperature of 500-600 ℃, for example: the constant temperature of 500 ℃,550 ℃,580 ℃,600 ℃ and the like is 2-8h, for example: 2h,3h,4h,8h and the like, naturally cooling to normal temperature, washing with water and drying to constant weight to obtain the composite material. The heating rate of the heating is 5-10 ℃/min.
In this example, the mass ratio of the crude composite to KOH in the KOH solution is 1: 1.
In the embodiment, in the step (1), 0.5mol/L NaOH solution is adopted for residual sludge of a sewage treatment plant, the mixture is mixed according to a mass ratio of the sludge to the NaOH being 1.
In the embodiment, in the step (2), the natural siderite is crushed by a ball mill, is sieved by a 200-mesh sieve, is washed by water and is dried to constant weight, and the siderite powder is obtained.
Example 1
Taking residual sludge of a sewage treatment plant, mixing the residual sludge with 0.5mol/L NaOH solution according to the mass ratio of the sludge to the NaOH of 1;
crushing natural siderite by a ball mill, sieving by a 200-mesh sieve, washing by water, and drying at 105 ℃ to constant weight to obtain siderite powder;
fully mixing the magnetite powder and the sludge powder according to a mass ratio of 1:3, feeding the mixture into a tubular furnace, heating the mixture to 600 ℃ at a speed of 10 ℃/min, preserving the heat for 6 hours, naturally cooling the mixture to normal temperature, washing the mixture with water, and drying the mixture to constant weight at 105 ℃ to obtain a crude composite material;
ultrasonically dispersing the crude composite material in 1mol/L KOH solution, controlling the mass ratio of the crude composite material to KOH to be 1.
Example 2
Crushing natural siderite by a ball mill, sieving by a 200-mesh sieve, washing by water, and drying at 105 ℃ to constant weight to obtain siderite powder;
feeding the siderite powder into a tubular furnace, heating to 600 ℃ at the speed of 10 ℃/min, preserving heat for 6 hours, naturally cooling to normal temperature, washing with water, and drying to constant weight at 105 ℃ to obtain coarse siderite powder;
ultrasonically dispersing the crude siderite powder in a 1mol/L KOH solution, controlling the mass ratio of the crude siderite powder to KOH to be 1.
Example 3
Taking the excess sludge of the sewage treatment plant, mixing the excess sludge with 0.5mol/L NaOH solution according to the mass ratio of the sludge to the NaOH of 1;
feeding the sludge powder into a tube furnace, heating to 600 ℃ at the speed of 10 ℃/min, preserving heat for 6 hours, naturally cooling to normal temperature, washing with water, and drying to constant weight at 105 ℃ to obtain coarse sludge powder;
ultrasonically dispersing coarse sludge powder in a 1mol/L KOH solution, controlling the mass ratio of the coarse sludge powder to KOH to be 1.
Test 1
The composite material prepared in example 1 was used as a sewage treatment agent for treating sewage produced in a brewery at the following COD concentrations.
1, sewage: the brewing wastewater of the Maotai-flavor brewhouse is placed in a conical flask, the initial COD value is 38767mg/L, the pH value is adjusted to 4, the composite material prepared in the example 1 is added according to the ratio of 2g/L, the mixture is placed in a shaking table at room temperature and oscillated for 12 hours, after adsorption balance, a magnetic field is added to the periphery of the conical flask for magnetization and solid-liquid separation, and then the COD value in the liquid is measured.
Sewage 2: the brewery wastewater is put into a conical flask, the initial COD value is 40235mg/L, the pH value is adjusted to be 5, the composite material prepared in the example 1 is added according to the proportion of 2g/L, the conical flask is placed in a shaking table at room temperature for oscillation for 12 hours, after the adsorption balance, a magnetic field is added to the periphery of the conical flask for magnetization and solid-liquid separation, and then the COD value in the liquid is measured.
3, sewage: putting the brewing wastewater of the Maotai-flavor brewhouse into a conical flask, setting the initial COD value to be 44756mg/L, concentrating under reduced pressure, measuring the COD value to be 52141mg/L, adjusting the pH value to be 6, adding the composite material prepared in the example 1 according to the ratio of 2g/L, placing the conical flask in a shaking table at room temperature, oscillating for 12 hours, after adsorption balance, adding a magnetic field to magnetize the periphery of the conical flask, carrying out solid-liquid separation, and measuring the COD value in the liquid.
The COD removal effect of the sewage 1, the sewage 2 and the sewage 3 is detected, and the results are shown in the following table 1:
TABLE 1
Initial COD value (mg/L) COD value (mg/L) after treatment Removal Rate (%)
Waste water 1 38767 8464 78.2
Waste water 2 40235 9756 75.7
Waste water 3 52141 16329 68.6
As can be seen from the data in Table 1, the composite material obtained by the invention can be suitable for sewage treatment with COD concentration of 30000mg/L, the COD value is greatly reduced, the COD removal rate reaches more than 60%, the COD value in the sewage is greatly reduced, the subsequent treatment of the sewage is facilitated, and the adopted raw materials are easy to obtain and the cost is low.
Test 2
The crude composite material prepared in example 1 was used as adsorbent 1, the powder prepared in example 1 was used as adsorbent 2, the siderite adsorbent prepared in example 2 was used as adsorbent 3, and the sludge adsorbent prepared in example 3 was used as adsorbent 4. The treatment modes are the same as the treatment mode of the sewage 1 in the test 1. The COD value of the treated wastewater 1 was measured, and the results are shown in Table 2 below.
TABLE 2
Initial COD value (mg/L) COD value (mg/L) after treatment Removal Rate (%)
Adsorbent 1 38767 28945 25.3
Adsorbent 2 38767 36988 4.59
Adsorbent 3 38767 24959 35.6
Adsorbent 4 38767 27344 29.5
As can be seen from the data in Table 2, after the siderite powder and the sludge powder are prepared into the coarse composite material, the adsorption performance of the obtained adsorbent is greatly reduced when the activation treatment process is not thorough, so that the COD removal effect in the sewage is poor; if the COD is not activated, the removal rate of the COD is greatly reduced, but compared with the incomplete activation, the removal rate of the COD is higher; when the siderite ore powder or sludge powder is singly used as a raw material to prepare the adsorbent, the removal rate of COD in sewage with high COD concentration is lower than 40 percent, and the removal effect is not ideal.
The combination of the table 1 and the table 2 shows that the composite material obtained by the invention can be suitable for removing COD in wastewater with high COD concentration, so that the removal rate of the COD can reach more than 60%.
When the composite material obtained by the invention is scanned by an electron microscope, the result is shown in figure 2; as shown in fig. 3, the EDS shows that the composite material contains abundant functional groups, for example: fe-OH, C = O, -OH and the like, which is beneficial to reducing organic matters in the sewage and leading the COD removal rate to reach more than 60 percent, and the preparation process flow is simple, the raw materials are easy to obtain and the cost is low. When the composite material is used for sewage with high COD concentration and is in contact with sewage for treatment, the relation between the COD value and the time is shown in figure 5, the COD value is gradually reduced along with the prolonging of the adding time and tends to be stable when the sewage is treated for 12 hours, therefore, the contact action is preferably 12 hours, and the control dosage is 2g/L. Of course, the composite material created by the invention also meets the requirement of increasing the dosage, and is beneficial to shortening the time for contacting and treating sewage. Meanwhile, the composite material prepared by the invention has excellent nitrogen adsorption-desorption performance, and is shown in figure 4.
The invention may be implemented by conventional means, for example: the invention relates to a method for separating solid from liquid by using the action of an external magnetic field after sewage is treated, wherein the external magnetic field is mainly used for enabling a composite material and the sewage to be in a magnetic field environment, so that the composite material adsorbing the sewage is moved under the action of the magnetic field, and the purpose of solid-liquid separation is achieved, for example: as the external magnetic field placement method shown in FIG. 6, 11 pieces of magnets having a size of 10 mm. Times.5 mm. Times.2 mm, which were purchased from Xinhong Chang magnetic industries, ltd., were stacked outside the processing bottle as shown in FIG. 6 and subjected to a test.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. The preparation method of the natural siderite-sludge based composite material is characterized by comprising the following steps of:
(1) Pretreating sludge to prepare sludge powder;
(2) Preparing the siderite ore powder by ball milling of natural siderite;
(3) Mixing sludge powder and siderite powder according to the mass ratio of 3-7, feeding into a tubular furnace, heating to 500-600 ℃, keeping the temperature for 5-8h, naturally cooling, washing with water and drying to obtain a crude composite material;
(4) And activating the coarse composite material to prepare the composite material.
2. The method for preparing the natural siderite-sludge based composite material according to claim 1, wherein the temperature rise rate of the temperature rise is 5-10 ℃/min.
3. The method for preparing a natural siderite-sludge based composite material according to claim 1, wherein the step (4) is that the crude composite material is dispersed in 1mol/L KOH solution, dried to constant weight at 80 ℃ and then ground into primary powder; and then feeding the primary powder into a tube furnace, heating to 500-600 ℃, keeping the temperature constant for 2-8h, naturally cooling, washing with water and drying to obtain the composite material.
4. The method for preparing the natural siderite-sludge based composite material according to claim 1 or 3, wherein the water washing and drying is drying to a constant weight.
5. The method for preparing the natural siderite-sludge based composite material according to claim 3, wherein the temperature rise rate of the temperature rise is 5-10 ℃/min.
6. The method of preparing the natural siderite-sludge based composite material of claim 3, wherein the mass ratio of said crude composite material to KOH in said KOH solution is 1.
7. The method for preparing the natural siderite-sludge based composite material according to claim 1, wherein in the step (1), the excess sludge of the sewage treatment plant is mixed with 0.5mol/L NaOH solution according to the mass ratio of the sludge to the NaOH being 1.
8. The method for preparing the natural siderite-sludge based composite material according to claim 1, wherein in the step (2), the natural siderite is crushed by a ball mill, sieved by a 200-mesh sieve, washed by water and dried to constant weight to obtain the siderite powder.
9. A natural siderite-sludge based composite material obtainable by the method according to any one of claims 1 to 8.
10. The use of the natural siderite-sludge based composite material obtained by the method according to any one of claims 1 to 8 in the treatment of high concentration COD waste water or in the preparation of a treatment preparation for treating high concentration COD waste water.
CN202210633097.4A 2022-06-07 2022-06-07 Natural siderite-sludge-based composite material and preparation method and application thereof Pending CN115193400A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070113736A1 (en) * 2005-09-08 2007-05-24 Research Foundation Of The City University Of New York Catalytic adsorbents obtained from municipal sludges, industrial sludges, compost and tobacco waste and process for their production
JP2012115830A (en) * 2010-11-10 2012-06-21 Sks Consultant:Kk Adsorbent using dehydration sludge as raw material, method for production thereof, and adsorbent-containing article
CN106563413A (en) * 2016-10-18 2017-04-19 佛山慧创正元新材料科技有限公司 Ilmenite sludge activated carbon for phosphorus removing and preparing method of ilmenite sludge activated carbon
CN111807653A (en) * 2020-07-04 2020-10-23 遵义师范学院 Heteropolyacid-sludge-based adsorbent and preparation method and application thereof
CN112354516A (en) * 2020-10-26 2021-02-12 哈尔滨工业大学 Method for preparing magnetic sludge-based biochar material from sludge and application of magnetic sludge-based biochar material
CN113680324A (en) * 2021-07-20 2021-11-23 山西大同大学 Graphene oxide-magnetic nanoparticle-sludge composite adsorbent and preparation method and application thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070113736A1 (en) * 2005-09-08 2007-05-24 Research Foundation Of The City University Of New York Catalytic adsorbents obtained from municipal sludges, industrial sludges, compost and tobacco waste and process for their production
JP2012115830A (en) * 2010-11-10 2012-06-21 Sks Consultant:Kk Adsorbent using dehydration sludge as raw material, method for production thereof, and adsorbent-containing article
CN106563413A (en) * 2016-10-18 2017-04-19 佛山慧创正元新材料科技有限公司 Ilmenite sludge activated carbon for phosphorus removing and preparing method of ilmenite sludge activated carbon
CN111807653A (en) * 2020-07-04 2020-10-23 遵义师范学院 Heteropolyacid-sludge-based adsorbent and preparation method and application thereof
CN112354516A (en) * 2020-10-26 2021-02-12 哈尔滨工业大学 Method for preparing magnetic sludge-based biochar material from sludge and application of magnetic sludge-based biochar material
CN113680324A (en) * 2021-07-20 2021-11-23 山西大同大学 Graphene oxide-magnetic nanoparticle-sludge composite adsorbent and preparation method and application thereof

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