CN111530422B - Method for preparing modified carbon composite adsorbent by using carbon-containing polymer industrial wastes - Google Patents
Method for preparing modified carbon composite adsorbent by using carbon-containing polymer industrial wastes Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 72
- 150000001721 carbon Chemical class 0.000 title claims abstract description 57
- 239000002440 industrial waste Substances 0.000 title claims abstract description 34
- 229920000642 polymer Polymers 0.000 title claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 12
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000002699 waste material Substances 0.000 claims abstract description 28
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 23
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000004913 activation Effects 0.000 claims abstract description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 4
- 238000010000 carbonizing Methods 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000011261 inert gas Substances 0.000 claims abstract description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 4
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
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- 239000012209 synthetic fiber Substances 0.000 claims description 4
- 229920002994 synthetic fiber Polymers 0.000 claims description 4
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- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 239000000945 filler Substances 0.000 abstract description 11
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000001027 hydrothermal synthesis Methods 0.000 abstract description 2
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 1
- 238000005470 impregnation Methods 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 39
- 238000001179 sorption measurement Methods 0.000 description 21
- 229910052759 nickel Inorganic materials 0.000 description 19
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- 239000002351 wastewater Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
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- 239000002028 Biomass Substances 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 239000007868 Raney catalyst Substances 0.000 description 1
- 229910000564 Raney nickel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
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- 238000013401 experimental design Methods 0.000 description 1
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- 239000010842 industrial wastewater Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
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- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002816 nickel compounds Chemical class 0.000 description 1
- 229910001453 nickel ion Inorganic materials 0.000 description 1
- MOFOBJHOKRNACT-UHFFFAOYSA-N nickel silver Chemical compound [Ni].[Ag] MOFOBJHOKRNACT-UHFFFAOYSA-N 0.000 description 1
- 239000010956 nickel silver Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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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
-
- 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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/07—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of solid raw materials consisting of synthetic polymeric materials, e.g. tyres
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
Abstract
A method for preparing a modified carbon composite adsorbent by utilizing carbon-containing polymer industrial wastes relates to the technical field of polymer industrial waste recovery treatment. Directly carbonizing the carbon-containing polymer industrial waste under the protection of inert gas, then cleaning, drying, and carrying out activation pore-forming under the protection of nitrogen gas to obtain a carbon-containing polymer industrial waste porous carbon material; dissolving a porous carbon material, magnesium oxide, ferric nitrate and manganese nitrate which are carbon-containing high polymer industrial wastes by using water and dilute nitric acid, stirring and mixing uniformly, and then adjusting the pH value of the system by using an ammonia water solution; transferring the reaction solution into a microwave chemical reactor, starting a microwave function, and carrying out hydrothermal impregnation reaction; and then closing the microwave function, and drying to obtain the modified carbon composite adsorbent. The present invention uses waste carbon-containing polymer industrial waste as main carrier and uses MgO-Fe2O3‑MnO2The complex system is a filler of the adsorbent, and the multi-element composite adsorbent with excellent performance is prepared by a microwave hydrothermal method.
Description
Technical Field
The invention relates to the technical field of recovery and treatment of high polymer industrial wastes, in particular to a method for preparing a modified carbon composite adsorbent by using carbon-containing high polymer industrial wastes.
Background
The low cost of suitable carbon source to reduce the preparation cost is an important research direction for the production and application of porous carbon materials. Comprises the waste carbon-containing polymer industrial wastes processed by the process, including waste tires, waste rubber products, waste plastic products, waste synthetic fibers, waste synthetic resin products, waste leather products, carbon-containing polymer industrial product wastes and the like. Due to the characteristics of light weight, porosity, large yield and the like of the industrial products, the corresponding solid wastes and waste materials have the characteristics of large quantity, large volume and large occupied area, and the products and the solid wastes are widely applied to the fields of automobile industry, battery industry, cosmetic industry, clothing manufacturing industry, catering industry, environmental protection industry, high-grade furniture manufacturing industry and the like in the world. Therefore, there is an urgent need to solve these practical problems, and to provide a concept of converting effective substances in wastes into multi-application materials, and to realize recycling of biomass solid wastes and industrial wastewater and waste gas solid wastes.
Disclosure of Invention
The invention aims to provide a method for preparing a modified carbon composite adsorbent by utilizing carbon-containing high-molecular industrial wastes so as to realize the conversion of effective substances in the wastes into multi-application materials.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a method for preparing a modified carbon composite adsorbent by utilizing carbon-containing high polymer industrial wastes comprises the following steps:
firstly, preparing a carbon-containing polymer industrial waste porous carbon material
Directly carbonizing the carbon-containing high polymer industrial waste under the protection of inert gas, then cleaning, drying, and carrying out activation and pore-forming under the protection of nitrogen, thereby obtaining a porous carbon material of the carbon-containing high polymer industrial waste;
the carbon-containing high polymer industrial waste is selected from one of waste rubber products, waste plastic products, waste synthetic fibers, waste synthetic resins and waste leather;
② preparing modified carbon composite adsorbent
Dissolving a carbon-containing high polymer industrial waste porous carbon material, magnesium oxide, ferric nitrate and manganese nitrate by using water and dilute nitric acid, stirring and mixing uniformly, and adjusting the pH value of a system to be 5-12 by using an ammonia water solution;
transferring the reaction solution into a microwave chemical reactor, starting a 1000W microwave function, and carrying out hydrothermal dipping reaction at 80 ℃ for 40 minutes;
then the microwave function is closed, the drying temperature is set to be 110 ℃, and the modified carbon composite adsorbent C-MgO-Fe can be obtained after drying for 5 hours2O3-MnO2。
Preferably, in the preparation method, the weight ratio of the carbon-containing polymer industrial waste porous carbon material in the finally prepared modified carbon composite adsorbent is 60-80%, and MgO-Fe is used as a filler2O3-MnO2The weight ratio of the components is 20-40%. MgO and Fe in finally prepared modified carbon composite adsorbent2O3And MnO2In a molar ratio of 0.5 to 5: 1-3: 1 to 3.5.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention takes the waste carbon-containing polymer industrial waste after treatment as a main carrier and uses MgO-Fe2O3-MnO2The complex system is a filler of the adsorbent, and the multi-element composite adsorbent with excellent performance is prepared by a microwave hydrothermal method.
2) And characterizing the structure of the prepared composite adsorbent by adopting an instrument characterization means XRD and SEM, and testing the adsorption performance, thereby screening out components with excellent performance. The curve of the adsorption capacity, the removal time and the material composition of the series modified carbon-containing polymer industrial waste composite adsorbent with different compositions on the sewage solution containing nickel (trivalent nickel and 2-valent nickel) can be seen, and the curve is represented by (30 percent) MgO-Fe2O3-MnO2(1: 2: 1) the adsorption effect of the modified waste carbon-containing polymer industrial waste (70%) treated by the process is best, and the adsorption capacity reaches 327mg/g, so that the modified carbon composite adsorbent C-MgO-Fe prepared by the invention is proved2O3-MnO2Can be used for the environmental treatment of the nickel-containing industrial domestic sewage, waste water and waste gas.
3) The nickel enriched by recovery can be used for electroplating, batteries, alloys (such as nickel steel and nickel silver) and catalysts (such as raney nickel, particularly hydrogenation catalysts), can be used for manufacturing currency and the like, can be used for manufacturing stainless steel and other corrosion-resistant alloys (such as nickel steel, nickel-chromium steel and various non-ferrous metal alloys), hydrogenation catalysts and can be used for ceramic products, special chemical utensils, electronic circuits, glass-green and nickel compound preparation and the like, and can be widely used in the fields of machine manufacturing, ceramic pigments, permanent magnetic materials, electronic remote control and the like in airplanes, tanks, naval vessels, radars, missiles, spaceships and civil industries.
Drawings
The following provides a detailed description of the method for preparing a modified carbon composite adsorbent by using carbon-containing polymer industrial waste according to the present invention with reference to the following examples and accompanying drawings.
FIG. 1 shows preparation of various composite adsorbents and MgO and MnO in examples 1 to 72XRD pattern of (a).
FIG. 2 is a graph showing the percentage of nickel ions remaining in the adsorbent in each series of the composite adsorbents prepared in examples 1 to 7.
FIG. 3 is a graph showing the adsorption amount of each series of composite adsorbents prepared in examples 1 to 7.
Fig. 4 is SEM images of low, medium, and high magnification in sequence for the composite adsorbent prepared in example 1.
Detailed Description
Example 1
In the implementation, the prepared modified carbon composite adsorbent C-MgO-Fe2O3-MnO2Wherein the porous carbon material accounts for 70 wt% of the finally prepared modified carbon composite adsorbent, and MgO-Fe is used as filler2O3-MnO2The weight ratio of the components is 30 percent. MgO and Fe in finally prepared modified carbon composite adsorbent2O3And MnO2In a molar ratio of 1: 2: 1. the preparation method comprises the following steps:
firstly, preparing a carbon-containing polymer industrial waste porous carbon material
Directly carbonizing the carbon-containing high polymer industrial waste under the protection of inert gas, then cleaning, drying, and carrying out activation and pore-forming under the protection of nitrogen, thereby obtaining the carbon-containing high polymer industrial waste porous carbon material.
The carbon-containing polymer industrial waste is selected from one of waste rubber products, waste plastic products, waste synthetic fibers, waste synthetic resins and waste leather.
② preparing modified carbon composite adsorbent
Dissolving the carbon-containing high polymer industrial waste porous carbon material, magnesium oxide, ferric nitrate and manganese nitrate by using water and dilute nitric acid, stirring and mixing uniformly, and adjusting the pH value of the system to 5-12 by using an ammonia water solution.
Transferring the reaction liquid into a microwave chemical reactor, starting a 1000W microwave function, and carrying out immersion reaction for 40 minutes at 80 ℃ in a hydrothermal mode.
Then the microwave function is closed, the drying temperature is set to be 110 ℃, and the modified carbon composite adsorbent C-MgO-Fe can be obtained after drying for 5 hours2O3-MnO2(1：2：1)。
Example 2
In the implementation, the prepared modified carbon composite adsorbent C-MgO-Fe2O3-MnO2Wherein the porous carbon material accounts for 70 wt% of the finally prepared modified carbon composite adsorbent, and MgO-Fe is used as filler2O3-MnO2The weight ratio of the components is 30 percent. MgO and Fe in finally prepared modified carbon composite adsorbent2O3And MnO2In a molar ratio of 1: 1: 1. the preparation method is the same as example 1, and the modified carbon composite adsorbent C-MgO-Fe is obtained2O3-MnO2(1：1：1)。
Example 3
In the implementation, the prepared modified carbon composite adsorbent C-MgO-Fe2O3-MnO2Wherein the porous carbon material accounts for 70 wt% of the finally prepared modified carbon composite adsorbent, and MgO-Fe is used as filler2O3-MnO2The weight ratio of the components is 30 percent. MgO and Fe in finally prepared modified carbon composite adsorbent2O3And MnO2In a molar ratio of 1: 1: 2. the preparation method is the same as example 1, and the modified carbon composite adsorbent C-MgO-Fe is obtained2O3-MnO2(1：1：2)。
Example 4
In the implementation, the prepared modified carbon composite adsorbent C-MgO-Fe2O3-MnO2Wherein the porous carbon material accounts for 70 wt% of the finally prepared modified carbon composite adsorbent, and MgO-Fe is used as filler2O3-MnO2The weight ratio of the components is 30 percent. MgO and Fe in finally prepared modified carbon composite adsorbent2O3And MnO2In a molar ratio of 1: 2: 2. the preparation method is the same as example 1, and the modified carbon composite adsorbent C-MgO-Fe is obtained2O3-MnO2(1：2：2)。
Example 5
In the implementation, the prepared modified carbon composite adsorbent C-MgO-Fe2O3-MnO2Wherein the porous carbon material accounts for 70 wt% of the finally prepared modified carbon composite adsorbent, and MgO-F is used as fillere2O3-MnO2The weight ratio of the components is 30 percent. MgO and Fe in finally prepared modified carbon composite adsorbent2O3And MnO2In a molar ratio of 2: 1: 1. the preparation method is the same as example 1, and the modified carbon composite adsorbent C-MgO-Fe is obtained2O3-MnO2(2：1：1)。
Example 6
In the implementation, the prepared modified carbon composite adsorbent C-MgO-Fe2O3-MnO2Wherein the porous carbon material accounts for 70 wt% of the finally prepared modified carbon composite adsorbent, and MgO-Fe is used as filler2O3-MnO2The weight ratio of the components is 30 percent. MgO and Fe in finally prepared modified carbon composite adsorbent2O3And MnO2In a molar ratio of 2: 1: 2. the preparation method is the same as example 1, and the modified carbon composite adsorbent C-MgO-Fe is obtained2O3-MnO2(2：1：2)。
Example 7
In the implementation, the prepared modified carbon composite adsorbent C-MgO-Fe2O3-MnO2Wherein the porous carbon material accounts for 70 wt% of the finally prepared modified carbon composite adsorbent, and MgO-Fe is used as filler2O3-MnO2The weight ratio of the components is 30 percent. MgO and Fe in finally prepared modified carbon composite adsorbent2O3And MnO2In a molar ratio of 2: 2: 1. the preparation method is the same as example 1, and the modified carbon composite adsorbent C-MgO-Fe is obtained2O3-MnO2(2：2：1)。
Example 8
In the implementation, the prepared modified carbon composite adsorbent C-MgO-Fe2O3-MnO2Wherein the porous carbon material accounts for 80 wt% of the finally prepared modified carbon composite adsorbent, and MgO-Fe is used as filler2O3-MnO2The weight ratio of the components is 20 percent. MgO and Fe in finally prepared modified carbon composite adsorbent2O3And MnO2In a molar ratio of 5: 3: 1. the preparation method is the same as example 1, and the modified carbon composite adsorbent is obtainedAdditive C-MgO-Fe2O3-MnO2(5：3：1)。
Example 9
In the implementation, the prepared modified carbon composite adsorbent C-MgO-Fe2O3-MnO2Wherein the porous carbon material accounts for 60 wt% of the finally prepared modified carbon composite adsorbent, and MgO-Fe is used as filler2O3-MnO2The weight ratio of the components is 40 percent. MgO and Fe in finally prepared modified carbon composite adsorbent2O3And MnO2In a molar ratio of 0.5: 1: 3.5. the preparation method is the same as example 1, and the modified carbon composite adsorbent C-MgO-Fe is obtained2O3-MnO2(0.5：1：3.5)。
FIG. 1 shows preparation of various composite adsorbents and MgO and MnO in examples 1 to 72XRD pattern of (a). As can be seen from FIG. 1, the XRD diffraction pattern of the composite adsorbent is obviously C, MgO, Fe2O3，MnO2The diffraction peaks are all sharp, which shows that the synthesized composite adsorbent is in phase with the target C-MgO-Fe of experimental design2O3-MnO2Are matched.
FIG. 2 is a graph showing the effect of a series of modified carbon composite adsorbent materials of different compositions in examples 1-7 on the removal rate of a wastewater solution containing nickel (trivalent nickel and divalent nickel) ions under sunlight. Wherein the dosage of the adsorbing material is 40mg, the adsorption time is 70min, the volume of the nickel-containing sewage solution is 100mL, and the initial concentration is 100 mg/L. As can be seen from FIG. 3, the composite adsorbent product C-MgO-Fe prepared in example 12O3-MnO2The adsorption effect of (1: 2: 1) is the best, the removal rate reaches 99.6%, and the adsorption removal effect of all series products with different compositions is better along with the time extension. After the adsorption time reaches 40 minutes, the residual nickel amount is basically stable along with the increase of the time, the data are basically not changed, and the adsorption/enrichment process is mainly completed within 40 minutes, and the adsorption/enrichment effect is good.
FIG. 3 shows the adsorption capacity of the modified carbon composite adsorbent materials of examples 1-7 on nickel-containing (trivalent nickel and divalent nickel) solutions under sunlight conditionsCurve with removal time, material composition. Wherein the dosage of the adsorbing material is 50mg, the adsorption/enrichment time is 70min, and the volume of the nickel (trivalent nickel and divalent nickel) containing solution is 500 mL. As can be seen from FIG. 4, the composite adsorbent product C-MgO-Fe prepared in example 12O3-MnO2The adsorption effect of (1: 2: 1) is best, the adsorption amount reaches 327mg/g, and the adsorption removal effect of all series products with different compositions is better along with the prolonging of time, after the adsorption time reaches 40 minutes, the adsorption amount basically reaches stability along with the increasing of time, which shows that the adsorption process is mainly completed within 40 minutes, and the adsorption effect is good. Thus confirming that the modified carbon composite adsorbent prepared by the invention is C-MgO-Fe2O3-MnO2Can be used for the environmental treatment of the nickel-containing industrial domestic sewage, waste water and waste gas.
Fig. 4 is SEM images of low, medium, and high magnification in sequence for the composite adsorbent prepared in example 1. As can be seen from FIG. 4, example 1 yielded a composite adsorbent product C-MgO-Fe having a mixed structure of a flake shape and a spherical shape2O3-MnO2The pore structure is obvious, the microstructure is in multi-level and multi-scale, the size range is 500nm-4um, and the structural characteristics directly influence the adsorption performance of the microstructure so as to meet the aim of adsorbing and removing chromium in the wastewater.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (1)
1. A method for preparing a modified carbon composite adsorbent by utilizing carbon-containing high polymer industrial wastes is characterized by comprising the following steps:
firstly, preparing a carbon-containing polymer industrial waste porous carbon material
Directly carbonizing the carbon-containing high polymer industrial waste under the protection of inert gas, then cleaning, drying, and carrying out activation and pore-forming under the protection of nitrogen, thereby obtaining a porous carbon material of the carbon-containing high polymer industrial waste;
the carbon-containing high polymer industrial waste is selected from one of waste rubber products, waste plastic products, waste synthetic fibers, waste synthetic resins and waste leather;
② preparing modified carbon composite adsorbent
Dissolving a carbon-containing high polymer industrial waste porous carbon material, magnesium oxide, ferric nitrate and manganese nitrate by using water and dilute nitric acid, stirring and mixing uniformly, and adjusting the pH value of a system to be 5-12 by using an ammonia water solution;
transferring the reaction solution into a microwave chemical reactor, starting a 1000W microwave function, and carrying out hydrothermal dipping reaction at 80 ℃ for 40 minutes;
then the microwave function is closed, the drying temperature is set to be 110 ℃, and the modified carbon composite adsorbent C-MgO-Fe can be obtained after drying for 5 hours2O3-MnO2The composite adsorbent contains 60-80 wt% of porous carbon material as stuffing MgO-Fe2O3-MnO220-40% by weight of MgO and Fe2O3And MnO2In a molar ratio of 0.5 to 5: 1-3: 1 to 3.5.
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