WO2018036752A1 - Method for preparing a nano mgo activated carbon for adsorbing heavy metals - Google Patents
Method for preparing a nano mgo activated carbon for adsorbing heavy metals Download PDFInfo
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- WO2018036752A1 WO2018036752A1 PCT/EP2017/069304 EP2017069304W WO2018036752A1 WO 2018036752 A1 WO2018036752 A1 WO 2018036752A1 EP 2017069304 W EP2017069304 W EP 2017069304W WO 2018036752 A1 WO2018036752 A1 WO 2018036752A1
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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
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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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
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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
- 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
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
- B01J20/3204—Inorganic carriers, supports or substrates
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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
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3234—Inorganic material layers
- B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
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- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/08—Nanoparticles or nanotubes
Definitions
- First aspect of the present invention provides a method for preparing a nano MgO activated carbon for adsorbing heavy metals, the method comprising steps of: a. treating activated carbon with dilute nitric acid, then washing in water and anhydrous solvent, and drying at 60 to 80°C, to obtain treated activated carbon;
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The present invention relates to the field of water purification, and discloses a method for preparing a nano MgO activated carbon for adsorbing heavy metals. Specifically, is the method comprises the following steps: a. treating activated carbon with dilute nitric acid, then washing in water and anhydrous solvent, and drying at 60 to 80°C, to obtain treated activated carbon; b. providing an aqueous Mg(NO3)2 solution with deionized water as a solvent; c. adding the treated activated carbon obtained from step a to the aqueous Mg(NO3)2 solution obtained from step b, and stirring to mix evenly; d. preparing an aqueous urea solution, then dripping the aqueous urea solution into the solution processed in step c, and stirring to obtain a liquid mixture; e. drying the activated carbon processed in step d at 60 to 80°C.; and f. calcining the activated carbon processed in step e to obtain nano MgO activated carbon for adsorbing heavy metals. In the present invention, flower-like nano MgO is loaded on the surface or in the voids of activated carbon by a chemical deposition method; this can not only preserve the intrinsic characteristics of a nano material, but also enhance the stability thereof, and the heavy metals lead and cadmium in drinking water can be adsorbed efficiently.
Description
METHOD FOR PREPARING A NANO MGO ACTIVATED CARBON FOR
ADSORBING HEAVY METALS
Field of the invention
The present invention relates to the field of water purification, in particular to a method for preparing a nano MgO activated carbon capable of adsorbing heavy metals in water.
Background of the invention
Rivers, lakes and reservoirs are the main forms of surface water used as drinking water sources. Monitoring and analysis of these types of bodies of water has shown that these forms of surface water have already been contaminated with heavy metals such as lead and cadmium. Heavy metals such as lead and cadmium are easily concentrated in organisms through the food chain, and constitute a serious threat to the health of organisms and the human body. Pollution of the water from water sources not only causes considerable harm to the health of organisms and the human body, but also has a significant effect on the water quality and conventional water purification processes of water supply plants. As people's quality of life continuously improves and progress is made in means of detection and analysis, people's demands on drinking water quality will become more stringent, and corresponding water quality standards for water supply are also continuously rising. Thus, the question of how to effectively remove heavy metals such as lead and cadmium from drinking water has become an environmental problem that is currently in urgent need of a solution.
As an alkaline agent, more correctly an alkaline agent with very strong buffering properties and efficient chemical adsorbency, MgO is receiving more and more attention. In recent years, there has been much research and development in connection with the applications of magnesium agents in different fields, and applications in the environmental field have topped the list. They show excellent results in the treatment of wastewater from printing and dyeing as well as acidic wastewater for example, and especially in the removal of heavy metal ions, so are revered as environmentally friendly chemicals.
Summary of the invention
First aspect of the present invention provides a method for preparing a nano MgO activated carbon for adsorbing heavy metals, the method comprising steps of: a. treating activated carbon with dilute nitric acid, then washing in water and anhydrous solvent, and drying at 60 to 80°C, to obtain treated activated carbon;
b. providing an aqueous Mg(NC>3)2 solution with deionized water as a solvent;
c. adding the treated activated carbon obtained from step a to the aqueous Mg(NC>3)2 solution obtained from step b, and stirring to mix evenly;
d. preparing an aqueous urea solution, then dripping the aqueous urea solution into the solution processed in step c, and stirring to obtain a liquid mixture;
e. drying the activated carbon processed in step d at 60 to 80°C; and f. calcining the activated carbon processed in step e to obtain nano MgO activated carbon for adsorbing heavy metals.
Second aspect of the present invention provides a nano MgO activated carbon obtained by the method according to first aspect.
Third aspect of the present invention provides a filter core, comprising a filter core body, and a nano MgO activated carbon, wherein the nano a-Fe203 modified activated carbon is prepared by the method according to first aspect and is packed in the filter core body.
Fourth aspect of the present invention provides use of nano MgO activated carbon obtained by any method according to first aspect for adsorbing heavy metals.
Fifth aspect of the present invention provides use of nano MgO activated carbon obtained by any method according to first aspect for removal of heavy metals from water.
Brief Description of drawings
Fig. 1 is a curve of a first determination method.
Fig. 2 is a curve of a second determination method.
Fig. 3 is a curve of a third determination method.
Fig. 4 is a curve of a fourth determination method.
Detailed description of the invention
In response to the problem of removing heavy metals such as lead and cadmium from drinking water in the prior art, the present invention provides a method for preparing a nano MgO activated carbon for adsorbing heavy metals.
The term nano MgO means nano sized MgO, which is magnesium oxide Nanomaterials with diameters of <100 nm.To solve the abovementioned technical problem, the present invention employs the following technical solution:
The present invention provides a method for preparing a nano MgO activated carbon for adsorbing heavy metals, the method comprising steps of: a. treating activated carbon with dilute nitric acid, then washing in water and anhydrous solvent, and drying at 60 to 80°C, to obtain treated activated carbon;
b. providing an aqueous Mg(NOs)2 solution with deionized water as a solvent;
c. adding the treated activated carbon obtained from step a to the aqueous Mg(NOs)2 solution obtained from step b, and stirring to mix evenly;
d. preparing an aqueous urea solution, then dripping the aqueous urea solution into the solution processed in step c, and stirring to obtain a liquid mixture;
e. drying the activated carbon processed in step d at 60 to 80°C; and f. calcining the activated carbon processed in step e to obtain nano MgO activated carbon for adsorbing heavy metals.
It is preferred that the present invention provides a method of the present invention, wherein the anhydrous solvent is anhydrous ethanol.
It is preferred that the molar ratio of Mg(N03)2 to urea in the liquid mixture is 1 : 2.
It is preferred that volume ratio of anhydrous solvent to water in step a ranges from 1 :3 to 1 :1 , and the washing time in each case ranges from 0.5 to 2 hours.
It is preferred that treatment of activated carbon in dilute nitric acid comprises immersing the activated carbon in dilute nitric acid for a period of 0.5 to 2 hours.
It is preferred that in step c, stirring is performed for 2.5 to 5.5 hours at a temperature ranging from 45 to 50°C.
It is preferred that the stirring in step c is performed when the temperature has been increased to 45 to 50°C.
It is preferred that in step d, after dripping the aqueous urea solution into the solution processed in step c, the pH is adjusted in the range of 8.0 to 10.0.
It is preferred that in step d, NaOH is used to adjust the pH.
It is preferred that the calcining process in step f comprises: increasing temperature to 350 to 400°C at a rate of 3 to 5°C/min, and maintaining the temperature for 1 .5 to 4.5 hours.
The present invention provides a nano MgO activated carbon obtained by any method of the present invention.
The present invention also provides a filter core, comprising a filter core body, and a nano a-Fe203 modified activated carbon, wherein the nano a-Fe203 modified activated carbon is prepared by the method according to the present invention and is packed in the filter core body.
The present invention also provides use of nano MgO activated carbon obtained by method according to the present invention for adsorbing heavy metals.
The present invention also provides use of nano MgO activated carbon obtained by any method according to first aspect for removal of heavy metals from water.
It is preferred that the method for preparing a nano MgO activated carbon for adsorbing heavy metals comprises steps of:: a. immersing activated carbon in dilute nitric acid, then washing alternately in water and anhydrous ethanol, to remove substances adhering to the surface; sun- drying, air-drying, or oven-drying at 60 - 80°C, to remove surplus water from the surface or voids of the activated carbon, in preparation for use;
b. using Mg(NC>3)2-6H20 as a precursor for producing MgO, making up a colourless transparent aqueous Mg(NC>3)2 solution with deionized water as a solvent;
c. adding the activated carbon processed in process step a to the aqueous Mg(NC>3)2 solution processed in step b, and stirring to mix evenly;
d. weighing out a certain amount of urea as an alkaline liquid for producing MgO, making up an aqueous urea solution therefrom, then dripping the formulated aqueous urea solution into the solution processed in step c, and stirring;
e. sun-drying, air-drying, or oven-drying at 60 - 80°C the activated carbon processed in step d;
f. putting the activated carbon processed in step e into a calcining furnace and calcining to obtain nano MgO activated carbon for adsorbing heavy metals; calcining can cause the MgO to assume a special crystal form and thereby have a strong capacity for adsorbing heavy metals.
Preferably, the volume ratio of anhydrous ethanol to water in step a is 1 :3 to 1 :1 , and the washing time in each case is 1 h.
Preferably, the concentration of dilute nitric acid in step a is 0.1 M, wherein 100 g of activated carbon is washed in 1 L of this dilute nitric acid, the immersion time being 0.5 to 2 h.
Preferably, heating is controlled by a water bath in step c, such that stirring is performed for 2.5 to 5.5 h at a temperature of 45 to 50°C, because the aqueous Mg(NOs)2 solution can be fully adsorbed on the surface or in the voids of the activated carbon at this temperature.
Preferably, in step d, after dripping the formulated aqueous urea solution into the solution processed in step c, the pH is adjusted to 8.0 to 10.0 using 0.01 M NaOH; within this pH range, the Mg(NC>3)2 can be completely converted to magnesium hydroxide, and this is a prerequisite for the formation of MgO.
Preferably, a calcining process in step f is as follows: increasing the temperature to 350 to 400°C at a rate of 3 to 5°C/min, and maintaining this temperature for 1 .5 to 4.5 h.
Due to the adoption of the technical solution described above, the present invention has the following significant technical effects:
In the present invention, flower-like nano MgO is loaded on the surface or in the voids of activated carbon by a chemical deposition method; this can not only preserve the intrinsic characteristics of a nano material, but also enhance the stability thereof, and the heavy metals lead and cadmium in drinking water can be adsorbed efficiently.
The present invention is described in further detail below in conjunction with the accompanying drawings and embodiments.
It is preferred that the method for preparing a nano MgO activated carbon for adsorbing heavy metals, comprises the following steps: a. immersing 10 g of activated carbon in 100 mL of dilute nitric acid with a concentration of 0.1 M for 0.5 h, then washing alternately in water and anhydrous ethanol, wherein the volume ratio of anhydrous ethanol to water is 1 : 3, and the washing time in each case is 0.5 h, to remove substances adhering to the surface, and oven-drying at 60°C, in preparation for use;
b. using Mg(N03)2-6H20 as a precursor, making up a 0.1 M aqueous Mg(NOs)2 solution with deionized water as a solvent;
c. adding the activated carbon processed in process step a to the aqueous Mg(NOs)2 solution processed in step b, and stirring for 2.5 h in a 45°C water bath to mix evenly;
d. step d: weighing out 1 .2 g of urea, making up an aqueous urea solution with a concentration of 0.2 M, then dripping the formulated aqueous urea solution into
the solution processed in step c, stirring and using 0.01 M NaOH to adjust the pH to 8.0 - 10.0;
e. step e: sun-drying the activated carbon processed in step d;
f. putting the activated carbon processed in step e into a calcining furnace and calcining, increasing the temperature to 350°C at a rate of 3°C/min, and maintaining this temperature for 1 .5 h, to obtain nano MgO activated carbon for adsorbing heavy metals.
The present invention provides use of the nano MgO activated carbon for adsorbing heavy metals in the removal of heavy metals from drinking water: original water containing the heavy metal lead or cadmium is made up using deionized water, and after having its flow speed adjusted by an electromagnetic flow meter, passes through nano flower-like MgO material before coming out; the original water and the water coming out are respectively sampled to measure the change in heavy metal concentration, wherein the specific determination methods are divided into the following types:
First type: Original waters with initial heavy metal lead concentrations of 5 mg/L, 10 mg/L and 15 mg/L are respectively made up, and after passing through nano MgO activated carbon, come out; the incoming water flow speed is 100 mL/min, and water is sampled at preset time points to measure the change in lead concentration thereof. See Fig. 1 for specific results.
Second type: Original waters with initial heavy metal cadmium concentrations of 5 mg/L, 10 mg/L and 15 mg/L are respectively made up, and after passing through nano MgO activated carbon, come out; the incoming water flow speed is 100 mL/min, and water is sampled at preset time points to measure the change in cadmium concentration thereof. See Fig. 2 for specific results.
Third type: Original water with an initial heavy metal lead concentration of 5 mg/L is made up, and after passing through nano MgO activated carbon, comes out; the incoming water flow speed is set to 1000 mL/min and 2000 mL/min respectively, and water is sampled at preset time points to measure the change in lead concentration thereof. See Fig. 3 for specific results.
Fourth type: Original water with an initial heavy metal cadmium concentration of 5 mg/L is made up, and after passing through nano MgO activated carbon, comes out; the incoming water flow speed is set to 1000 mL/min and 2000 mL/min respectively, and water is sampled at preset time points to measure the change in cadmium concentration thereof. See Fig. 4 for specific results.
Considering all of the above, it is clear that the ability of the nano MgO activated carbon to remove the heavy metals lead and cadmium is unrelated to flow speed, but in actual applications, flow speed is often an important factor restricting material applications. The ability of the nano MgO activated carbon to adsorb the heavy metals chromium and arsenic will not change significantly with a change in flow speed, therefore there is no need to take flow speed into account when designing a water purification apparatus; this material has very strong prospects for actual application. Furthermore, the preparation and application of this material involve simple operations, and it is very easy to industrialize, so has broad application prospects in the field of the removal of heavy metals from drinking water.
The present invention also provides a method for preparing a nano MgO activated carbon for adsorbing heavy metals, comprising the following steps: a. immersing 10 g of activated carbon in 100 mL of dilute nitric acid with a concentration of 0.1 M for 2 h, then washing alternately in water and anhydrous ethanol, wherein the volume ratio of anhydrous ethanol to water is 1 : 1 , and the washing time in each case is 2 h, to remove substances adhering to the surface, and sun-drying, in preparation for use;
b. using Mg(N03)2-6H20 as a precursor, making up a 0.1 M aqueous Mg(NOs)2 solution with deionized water as a solvent;
c. adding the activated carbon processed in process step a to the aqueous Mg(NOs)2 solution processed in step b, and stirring for 5.5 h in a 50°C water bath to mix evenly;
d. weighing out 1 .2 g of urea, making up an aqueous urea solution with a concentration of 0.2 M, then dripping the formulated aqueous urea solution into the solution processed in step c, stirring and using 0.01 M NaOH to adjust the pH to 8.0 - 10.0;
e. oven-drying at 80°C the activated carbon processed in step d;
f. putting the activated carbon processed in step e into a calcining furnace and calcining, increasing the temperature to 400°C at a rate of 5°C/min, and maintaining this temperature for 4.5 h, to obtain nano MgO activated carbon for adsorbing heavy metals.
In summary, the embodiments above are merely preferred embodiments of the present invention. All equivalent changes and modifications made within the patent application scope of the present invention shall be included in the scope of the present invention patent.
Claims
1. A method for preparing a nano MgO activated carbon for adsorbing heavy metals, the method comprising the following steps:
a. treating activated carbon with dilute nitric acid, then washing in water and anhydrous solvent, and drying at 60 to 80°C, to obtain treated activated carbon;
b. providing an aqueous Mg(NC>3)2 solution with deionized water as a solvent;
c. adding the treated activated carbon obtained from step a to the aqueous Mg(NC>3)2 solution obtained from step b, and stirring to mix evenly;
d. preparing an aqueous urea solution, then dripping the aqueous urea solution into the solution processed in step c, and stirring to obtain a liquid mixture;
e. drying the activated carbon processed in step d at 60 to 80°C; and f. calcining the activated carbon processed in step e to obtain nano MgO activated carbon for adsorbing heavy metals.
2. A method according to claim 1 , wherein the anhydrous solvent is anhydrous ethanol.
3. A method according to claims 1 or 2, wherein the molar ratio of Mg(NC>3)2 to urea in the liquid mixture is 1 : 2.
4. A method according to anyone of the preceding claims 1 to 3, wherein volume ratio of anhydrous solvent to water in step a ranges from 1 :3 to 1 :1 , and the washing time in each case ranges from 0.5 to 2 hours.
5. A method according to anyone of the preceding claims from 1 to 4, wherein the treatment of activated carbon in dilute nitric acid comprises immersing the activated carbon in dilute nitric acid for a period of 0.5 to 2 hours.
6. A method according to anyone of the preceding claims from 1 to 5, wherein, in step c, stirring is performed for 2.5 to 5.5 hours at a temperature ranging from 45 to 50°C.
7. A method according to anyone of the preceding claims from 1 to 6, wherein the stirring in step c is performed when the temperature has been increased to 45 to 50°C.
8. A method according to anyone of the preceding claims from 1 to 7, wherein, in step d, after dripping the aqueous urea solution into the solution processed in step c, the pH is adjusted in the range of 8.0 to 10.0.
9. A method according to anyone of the preceding claims from 1 to 7, wherein in step d, NaOH is used to adjust the pH.
10. A method according to anyone of the preceding claims from 1 to 9, wherein the calcining process in step f comprises: increasing temperature to 350 to 400°C at a rate of 3 to 5°C/min, and maintaining the temperature for 1 .5 to 4.5 hours.
1 1 . A nano MgO activated carbon obtained by any method according to anyone of the preceding claims from 1 to 10.
12. A filter core, comprising a filter core body, and a nano MgO activated carbon, wherein the nano a-Fe203 modified activated carbon is prepared by the method according to anyone of the preceding claims 1 to 10 and is packed in the filter core body.
13. Use of nano MgO activated carbon obtained by any method according to anyone of the preceding claims from 1 to 10 for adsorbing heavy metals.
14. Use of nano MgO activated carbon obtained by any method according to anyone of the preceding claims from 1 to 10 for removal of heavy metals from water.
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| CN201610734433.9 | 2016-08-25 | ||
| CN201610734433.9A CN106268639A (en) | 2016-08-25 | 2016-08-25 | A kind of preparation method of the nano-MgO activated carbon of Adsorption of Heavy Metals |
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| CN111530420A (en) * | 2020-05-13 | 2020-08-14 | 合肥学院 | Preparation method of porous carbon-based composite adsorbing material for agricultural and forestry waste |
| CN115025755A (en) * | 2022-05-16 | 2022-09-09 | 江苏科技大学 | MgO in-situ modified biochar VOCs adsorbent and preparation method and application thereof |
| WO2023114807A1 (en) * | 2021-12-16 | 2023-06-22 | Ionic Water Technologies, LLC | Treatment of carbon for contaminant removal |
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| CN109967041B (en) * | 2019-02-26 | 2020-08-04 | 中国矿业大学 | Bimetal modified magnetic biomass active carbon adsorbent, preparation method thereof and application thereof in wastewater treatment |
| CN110652961A (en) * | 2019-10-08 | 2020-01-07 | 安徽建筑大学 | Preparation method of magnesium oxide porous nano material loaded activated carbon fiber felt |
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| EP0311244A1 (en) * | 1987-08-25 | 1989-04-12 | Kureha Kagaku Kogyo Kabushiki Kaisha | Complex of magnesium oxide and titanium dioxide as a phosphate adsorbent |
| CN101837288A (en) * | 2010-05-20 | 2010-09-22 | 浙江工业大学 | Active carbon supported magnesium oxide catalyst for synthetic aromatic alcohol and application thereof |
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| CN111530420A (en) * | 2020-05-13 | 2020-08-14 | 合肥学院 | Preparation method of porous carbon-based composite adsorbing material for agricultural and forestry waste |
| WO2023114807A1 (en) * | 2021-12-16 | 2023-06-22 | Ionic Water Technologies, LLC | Treatment of carbon for contaminant removal |
| CN115025755A (en) * | 2022-05-16 | 2022-09-09 | 江苏科技大学 | MgO in-situ modified biochar VOCs adsorbent and preparation method and application thereof |
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