CN107961760A - A kind of activated carbon supported FeOOH compound adsorbent and its preparation and application - Google Patents

A kind of activated carbon supported FeOOH compound adsorbent and its preparation and application Download PDF

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Publication number
CN107961760A
CN107961760A CN201711240887.1A CN201711240887A CN107961760A CN 107961760 A CN107961760 A CN 107961760A CN 201711240887 A CN201711240887 A CN 201711240887A CN 107961760 A CN107961760 A CN 107961760A
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activated carbon
compound adsorbent
feooh
bromate
carbon supported
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赵振刚
韩德侠
刘瑞海
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South China University of Technology SCUT
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South China University of Technology SCUT
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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
    • B01J20/06—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
    • B01J20/02—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
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • 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
    • 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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/70—Treatment of water, waste water, or sewage by reduction
    • 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
    • C02F2101/12—Halogens or halogen-containing compounds

Abstract

The invention belongs to the technical field of water body purification processing, a kind of activated carbon supported FeOOH compound adsorbent and its preparation and application are disclosed.The method is：(1) activated carbon is subjected to acidification, changes boiling boiling, washing, changes boiling boiling, so repeat, until filtrate clear after activated carbon is washed, drying, high-temperature calcination, the activated carbon pre-processed；(2) by the activated carbon and FeCl of pretreatment3Solution is uniformly dispersed, and sealing, Host range, is washed, dry, obtains activated carbon supported FeOOH compound adsorbent.The method of the present invention is simple, of low cost；FeOOH is in fusiform in prepared compound adsorbent, and uniform load on the activated carbon, stablize by compound adsorbent, can efficiently remove bromate in water removal, be easily recycled and recycle.The compound adsorbent of the present invention is used to remove the bromate in drinking water.

Description

A kind of activated carbon supported FeOOH compound adsorbent and its preparation and application
Technical field
The invention belongs to water body purification processing technology field, and in particular to a kind of activated carbon supported compound suction of FeOOH Attached dose and preparation method and application, the compound adsorbent is used to remove bromate in water removal.The FeOOH for β- FeOOH。
Background technology
Toxic action of the bromate to human body is very strong, by international cancer tissue (International Agency for Reserch on Cancer, IRAC) it is defined as 2B grades of potential carcinogen matter.2004, the World Health Organization (World Health Organization, WHO) will《Water quality standard for drinking water》The safe level of middle bromate is lowered to 10 μ from 25 μ g/L g/L；China is existing《Standards for drinking water quality》(GB5749-2006) limit value for also providing bromate is 10 μ g/L.
Ozone-biological active carbon treatment technology has a significant effect to improving drinking water quality, still, when being deposited in raw water In certain density bromide ion, the bromate that conventional water treatment process is difficult to remove will be generated in ozonation.To the greatest extent Pipe ozonization water purification technique can significantly cut down Conventional pollution, but bromate is become influence resident's health at the same time Potential threat.Therefore the technical method that stringent control removes bromate in drinking water causes the close attention of people.
The minimizing technology of bromate mainly include decomposition method, membrane processing method, electronation removal method, activated carbon removal method, Catalytic hydrogenation removal method etc..Wherein, the hyperfiltration energy consumption in membrane processing method is high, and reverse osmosis membrane is expensive, and film is easily dirty Dye；Although nano zero valence iron removes, bromate is efficient, it is not easily recycled, and operating environment requirement is stringent；Biological degradation method week Phase is grown；Activated carbon adsorption reduction method efficiency is low.Therefore, new and effective bromic acid absorbing and reducing material is developed, is still current control The research emphasis of bromate in drinking water content processed.
The content of the invention
Inhaled to solve the bad existing method removal effect for removing bromate in water removal and use material expensive and activated carbon The problem of defects such as attached efficiency is low, the present invention provides a kind of activated carbon supported FeOOH compound adsorbent and its preparation side Method.For the present invention by activated carbon by being acidified with after calcining and activating, there are many micropores in activated carbon surface, and specific surface area increases, no Only β-FeOOH load factors are high, and are evenly distributed in fusiform on activated carbon surface.Compound adsorbent prepared by the present invention There is fabulous removal rate to bromate in water, it is of low cost.
It is described it is still another object of the present invention to provide the application of above-mentioned activated carbon supported FeOOH compound adsorbent Compound adsorbent is used to remove bromate in water removal.
The purpose of the present invention is achieved through the following technical solutions：
A kind of preparation method of activated carbon supported FeOOH compound adsorbent, comprises the following steps：
(1) Activated Carbon Pretreatment
Activated carbon is subjected to acidification, changes boiling boiling, washing, changes boiling boiling, so repeat, until activated carbon is washed Filtrate clear afterwards, drying, high-temperature calcination, the activated carbon pre-processed；
(2) by the activated carbon and FeCl of pretreatment3Solution is uniformly dispersed, sealing, in 90~150 DEG C of Host ranges 10~ 24h, washing is dry to constant weight, obtains activated carbon supported FeOOH compound adsorbent.
For the condition of acidification described in step (1) to be first ultrasonically treated 10~40min, sealing, stirs 10~36h；Institute The acid for stating acidification is acetum, its mass concentration is 40%~70%；The temperature of the high-temperature calcination is 400~600 ℃；The ultrasonic power is 100~300W
The time boiled every time in being boiled described in step (1) is 10~20min；The temperature of the drying is 60~80 ℃；
FeCl described in step (2)3The concentration of solution is 0.001~0.4mol/L, is preferably 0.001-0.05mol/L；
It is uniformly dispersed described in step (2) and refers to 10~15min of stirring.
Dry temperature described in step (2) is 60~100 DEG C.
Activated carbon supported FeOOH (β-FeOOH) compound adsorbent is used to remove the bromate in drinking water.
The application concretely comprises the following steps：It is compound that activated carbon supported FeOOH is added into the water body containing bromate Adsorbent, the bromate under conditions of being 2.0~12.0 in pH in absorbing and reducing water body, adsorption time is 6~24h, collects and lives Property charcoal load FeOOH (β-FeOOH) compound adsorbent.The temperature of the absorbing and reducing is 28~50 DEG C, absorbing and reducing Time is preferably 12~24h；The pH is preferably 2~6；
The dosage of the activated carbon supported FeOOH compound adsorbent is the Water quality containing bromate 0.000006~0.0005 times, be preferably 0.00004~0.0003；
The initial concentration of bromate is 100~1000 μ g/L in the water body.
Activated carbon supported β-FeOOH compound adsorbents are left for bromate removal rate in water higher than single-activity charcoal 80% The right side, as the reduction of solution ph and the removal rate of rise bromate of temperature gradually increase, other anion can be different in water Degree influences the removal of bromate.The absorption of bromate refers to the content of every gram of adsorbent absorption bromate, the removal of bromate Rate refers to the ratio of the bromate concentration adsorbed and initial concentration.
The present invention handles activated carbon by acidifying and high-temperature calcination, it is therefore an objective to removes activated carbon organic impurities surface impurity Fall, and pore-creating increase specific surface area, be conducive to β-FeOOH loads, and β-FeOOH uniformly divide in activated carbon surface in fusiform Cloth, load factor are high.In compound adsorbent prepared by the present invention β-FeOOH can bromate in reductive water, to bromate in water It is of low cost with fabulous removal rate, it is easily recycled and recycles.
Compared with existing adsorbent, the activated carbon supported β-FeOOH complexing agents that the present invention is prepared have the following advantages And beneficial effect：
(1) compound adsorbent of the invention can adsorb and remove the bromate in water body, and compound adsorbent shows bright The aobvious absorption property better than traditional sorbing material activated carbon, improves removal rate；
(2) bromate is thoroughly degraded to bromide ion by compound adsorbent of the invention, does not produce secondary pollution；Can be efficient Property remove bromate it is thorough, can meet increasingly stringent water standard；And the compound adsorbent stability of the present invention is good, can be long-term Use；
(3) low raw-material cost of compound adsorbent of the present invention, preparation section is simple, easily operated.
Brief description of the drawings
Fig. 1 is that the SEM of activated carbon schemes；
(activated carbon supported β-FeOOH are multiple for activated carbon supported FeOOH compound adsorbent prepared by embodiment 2 by Fig. 2 Close adsorbent) SEM figure；
Fig. 3 is activated carbon (curve a) and the activated carbon supported FeOOH compound adsorbent (activity of the preparation of embodiment 2 Charcoal load β-FeOOH compound adsorbents) (the XRD diffraction of curve b)；
Fig. 4 be activated carbon and embodiment 2 prepare activated carbon supported FeOOH compound adsorbent (activated carbon supported β- FeOOH compound adsorbents) under different time to the adsorbance curve of bromate.
Embodiment
The present invention is described in further detail with reference to specific embodiment and attached drawing, but the embodiment party of the present invention Formula not limited to this.
The SEM figures of activated carbon are as shown in Figure 1 in embodiment 1~3.
Embodiment 1
A kind of preparation method of activated carbon supported FeOOH compound adsorbent, comprises the following steps：
(1) 30g activated carbons are ultrasonically treated (power 200W, frequency 100KHz, time in 1L60wt% acetums 30min), seal, magnetic agitation 24h, change boiling boiling, washing, changes boiling boiling, so repeat, until filter after activated carbon is washed Liquid clear, it is dry, 24h is calcined under 500 DEG C of high temperature, the activated carbon pre-processed；It is described boil in boil every time when Between be 10min；The temperature of the drying is 80 DEG C；
(2) by the activated carbon and 50mL 0.001mol/L FeCl of 3g pretreatments3Solution stirs 15min, sealing, in 100 DEG C Host range 10h, washing is dry to constant weight (dry temperature is 70 DEG C), and it is compound to obtain activated carbon supported FeOOH Adsorbent.The load factor of FeOOH is 2.03% in the present embodiment.
Embodiment 2
A kind of preparation method of activated carbon supported FeOOH compound adsorbent, comprises the following steps：
(1) 30g activated carbons are ultrasonically treated (power 200W, frequency 100KHz, time in 1L60wt% acetums 30min), seal, magnetic agitation 24h, change boiling boiling, washing, changes boiling boiling, so repeat, until filter after activated carbon is washed Liquid clear, it is dry, 24h is calcined under 500 DEG C of high temperature, the activated carbon pre-processed；It is described boil in boil every time when Between be 15min；The temperature of the drying is 70 DEG C；
(2) by the activated carbon and 50mL 0.01mol/L FeCl of 3g pretreatments3Solution stirs 15min, sealing, in 140 DEG C Host range 15h, washing is dry to constant weight (dry temperature is 70 DEG C), obtains the compound suction of activated carbon supported FeOOH Attached dose.
Activated carbon supported FeOOH compound adsorbent (activated carbon supported β-FeOOH composite adsorptions prepared by embodiment 2 Agent) SEM figures it is as shown in Figure 2；
Activated carbon supported FeOOH compound adsorbent (activated carbon supported β-FeOOH prepared by activated carbon and embodiment 2 Compound adsorbent) XRD diffraction it is as shown in Figure 3；
The activated carbon supported FeOOH compound adsorbent (activated carbon supported β-FeOOH that activated carbon is prepared with embodiment 2 Compound adsorbent) under different time to the adsorbance curve of the bromate (BrO of 500mL400 μ g/L as shown in Figure 43-, absorption Agent dosage is all 0.1g).The load factor of FeOOH is 3.56% in the present embodiment.
Embodiment 3
A kind of preparation method of activated carbon supported FeOOH compound adsorbent, comprises the following steps：
(1) 30g activated carbons are ultrasonically treated (power 200W, frequency 100KHz, time in 1L60wt% acetums 30min), seal, magnetic agitation 24h, change boiling boiling, washing, changes boiling boiling, so repeat, until filter after activated carbon is washed Liquid clear, it is dry, 24h is calcined under 500 DEG C of high temperature, the activated carbon pre-processed；It is described boil in boil every time when Between be 15min；The temperature of the drying is 80 DEG C；
(2) by the activated carbon and 50mL 0.02mol/L FeCl of 3g pretreatments3Solution stirs 15min, sealing, in 150 DEG C Host range 20h, washing is dry to constant weight (dry temperature is 70 DEG C), obtains the compound suction of activated carbon supported FeOOH Attached dose.
The load factor of FeOOH is 2.34% in the present embodiment.
Application Example 1
Activated carbon supported FeOOH compound adsorbent prepared by embodiment 2 is used to remove the bromic acid in drinking water Salt：Activated carbon supported FeOOH compound adsorbent prepared by embodiment 2 is added in the water body that 500mL contains bromate, Stirring and adsorbing 24h, the removal rate for measuring bromate are 82.09%；In water body the initial concentration of bromate for 600 μ g/L, pH not Adjust, 28 DEG C of temperature, water body:Activated carbon supported FeOOH compound adsorbent mass ratio is 500:0.1.The absorption of bromate is Refer to the content of every gram of adsorbent absorption bromate, the removal rate of bromate refers to the bromate concentration adsorbed and initial concentration Ratio.
Application Example 2
Step is with Application Example 1, and adsorption time 4h, other conditions are constant, and the removal rate for measuring bromate is 65.01%, adsorbance is 1.95 μ g/mg.
Step is with Application Example 1, and adsorption time 6h, other conditions are constant, and the removal rate for measuring bromate is 72.53%, adsorbance is 2.18 μ g/mg.
Step is with Application Example 1, and adsorption time 8h, other conditions are constant, and the removal rate for measuring bromate is 76.64%, adsorbance is 2.30 μ g/mg.
It can be seen that under the conditions of other same, before absorption reaches balance, the removal rate of bromate with the time extension by It is cumulative to add.
Application Example 3
PH is adjusted to 2, according to water body by step with Application Example 1:Activated carbon supported β-FeOOH complexing agent (activated carbons Loading FeOOH compound adsorbent) mass ratio is 500:0.03 adds adsorbent, and other conditions are constant, measure bromate Removal rate is 69.82%, and adsorbance is 6.98 μ g/mg.
PH in adsorption conditions, is adjusted to 4, according to water body with Application Example 1 by step:Activated carbon supported β-FeOOH are multiple Mixture mass ratio is 500:0.03 adds adsorbent, and other conditions are constant, and the removal rate for measuring bromate is 55.56%, absorption Measure as 5.56 μ g/mg.
PH in adsorption conditions, is adjusted to 7, according to water body with Application Example 1 by step:Activated carbon supported β-FeOOH are multiple Mixture mass ratio is 500:0.03 adds adsorbent, and other conditions are constant, and the removal rate for measuring bromate is 25.79%, absorption Measure as 2.58 μ g/mg.
PH in adsorption conditions, is adjusted to 10, according to water body with Application Example 1 by step:Activated carbon supported β-FeOOH Complexing agent mass ratio is 500:0.03 adds adsorbent, and other conditions are constant, and the removal rate for measuring bromate is 22.30%, is inhaled Attached amount is 2.23 μ g/mg.
It can be seen that under the conditions of other same, activated carbon supported β-FeOOH complexing agents (the activated carbon supported compound suction of FeOOH Attached dose) the bromate removal rate in water body is reduced with the rise of pH, low pH is conducive to the removal of bromate in water.
Application Example 4
Step is with Application Example 1, and the initial concentration of bromate is 200 μ g/L, and other conditions are constant, the removal of bromate Rate is 96.82%, and adsorbance is 0.96 μ g/mg.
Step is with Application Example 1, and the initial concentration of bromate is 400 μ g/L, and other conditions are constant, the removal of bromate Rate is 91.99%, and adsorbance is 1.94 μ g/mg.
Step is with Application Example 1, and the initial concentration of bromate is 600 μ g/L, and other conditions are constant, the removal of bromate Rate is 82.09%, and adsorbance is 2.46 μ g/mg.
It can be seen that under the conditions of other same, with the increase of bromate concentration, the removal rate of bromate reduces accordingly, but inhales Attached amount gradually increases.
Application Example 5
Step is with Application Example 1, and temperature remains 30 DEG C, and bromate concentration is 1000 μ g/L, and other conditions are constant.Bromine The removal rate of hydrochlorate is 85.25%, and adsorbance is 4.26 μ g/mg.
For step with Application Example 1, temperature remains 40 DEG C, and bromate concentration is 1000 μ g/L, the removal rate of bromate For 98.35%, adsorbance is 4.92 μ g/mg.
Step is with Application Example 1, and temperature remains 50 DEG C, and bromate concentration is 1000 μ g/L, and other conditions are constant.Bromine The removal rate of hydrochlorate is 99.72%, and adsorbance is 4.99 μ g/mg.
It can be seen that under the conditions of other same, with the increase of temperature, the removal rate of bromate accordingly increases, and illustrates that heating is beneficial to The removal of bromate.
Application Example 6
Step is with Application Example 1, NO in solution3 -Concentration is 10mg/L and 20mg/L respectively, and other conditions are constant, measure The removal rate of bromate is 59.08% and 47%, and adsorbance is 1.77 and 1.41 μ g/mg.
Step is with Application Example 1, SO in solution4 2-Concentration is that concentration is difference 10mg/L and 20mg/L, and other conditions are not Become, the removal rate for measuring bromate is 68.66% and 56%, and adsorbance is 2.06 and 1.68 μ g/mg.
Step is with Application Example 1, Cl in solution-Concentration is that concentration is difference 10mg/L and 20mg/L, and other conditions are not Become, the removal rate for surveying bromate is 62.5% and 59.75%, and adsorbance is 1.875 and 1.79 μ g/mg.
Step is with Application Example 1, CO in solution3 2-Concentration is that concentration is difference 10mg/L and 20mg/L, and other conditions are not Become, the removal rate for surveying bromate is 25% and 17.75%, and adsorbance is 0.75 and 0.53 μ g/mg.
Step is with Application Example 1, PO in solution4 3-Concentration is that concentration is difference 10mg/L and 20mg/L, and other conditions are not Become, the removal rate for surveying bromate is 18.33% and 16.58%, and adsorbance is 0.55 and 0.50 μ g/mg.
It can be seen that under the same terms, in water body the presence of anion can influence the removal of bromate in various degree, it is different cloudy The removal rate of ion pair bromate influences size order PO4 3->CO3 2->NO3 ->Cl->SO4 2-。
Application Example 7
Step changes adsorbent into activated carbon, other conditions are constant, measure the removal rate of bromate with Application Example 1 For 18.5%, adsorbance is 0.38 μ g/mg.
It can be seen that under the conditions of other same, unmodified activated carbon is far from bromate removal ability in water activated carbon supported β-FeOOH complexing agents are strong.

Claims (8)

  1. A kind of 1. preparation method of activated carbon supported FeOOH compound adsorbent, it is characterised in that：Comprise the following steps：
    (1) Activated Carbon Pretreatment
    Activated carbon is subjected to acidification, changes boiling boiling, washing, changes boiling boiling, so repeat, until filter after activated carbon is washed Liquid clear, drying, high-temperature calcination, the activated carbon pre-processed；
    (2) by the activated carbon and FeCl of pretreatment3Solution is uniformly dispersed, and sealing, in 90~150 DEG C of 10~24h of Host range, is washed Wash, it is dry to constant weight, obtain activated carbon supported FeOOH compound adsorbent.
  2. 2. the preparation method of activated carbon supported FeOOH compound adsorbent according to claim 1, it is characterised in that：Step Suddenly FeCl described in (2)3The concentration of solution is 0.001~0.4mol/L.
  3. 3. the preparation method of activated carbon supported FeOOH compound adsorbent according to claim 1, it is characterised in that：Step Suddenly for the condition of acidification described in (1) to be first ultrasonically treated 10~40min, sealing, stirs 10~36h；The high-temperature calcination Temperature be 400~600 DEG C.
  4. 4. the preparation method of activated carbon supported FeOOH compound adsorbent according to claim 1, it is characterised in that：Step Suddenly the acid of acidification described in (1) is acetum, its mass concentration is 40%~70%；In being boiled described in step (1) The time boiled every time is 10~20min；The temperature of the drying is 60~80 DEG C；
    Dry temperature described in step (2) is 60~100 DEG C.
  5. 5. a kind of activated carbon supported FeOOH compound adsorbent is obtained by Claims 1 to 4 any one of them preparation method Arrive.
  6. 6. the application of activated carbon supported FeOOH compound adsorbent according to claim 5, it is characterised in that：The work Property charcoal load FeOOH compound adsorbent be used to remove the bromate in drinking water.
  7. 7. application according to claim 6, it is characterised in that：Concretely comprise the following steps：Added into the water body containing bromate Activated carbon supported FeOOH compound adsorbent, the bromate under conditions of being 2.0~12.0 in pH in absorbing and reducing water body, Adsorption time is 6~24h, collects activated carbon supported FeOOH compound adsorbent.
  8. 8. application according to claim 7, it is characterised in that：The temperature of the absorbing and reducing is 28~50 DEG C, and absorption is also The former time is 12~24h；The pH is 2~6；
    The dosage of the activated carbon supported FeOOH compound adsorbent for the Water quality 0.000006 containing bromate~ 0.0005 times；
    The initial concentration of bromate is 100~1000 μ g/L in the water body.
CN201711240887.1A 2017-11-30 2017-11-30 A kind of activated carbon supported FeOOH compound adsorbent and its preparation and application Pending CN107961760A (en)

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CN111686731A (en) * 2020-06-05 2020-09-22 中北大学 Preparation method of alpha-FeOOH/GAC catalyst and application of alpha-FeOOH/GAC catalyst in degrading nitrobenzene wastewater in high gravity field
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CN111575120B (en) * 2020-04-27 2021-10-15 北京金鱼科技有限责任公司 Neutral cleaning agent for range hood and preparation method thereof
CN111686731A (en) * 2020-06-05 2020-09-22 中北大学 Preparation method of alpha-FeOOH/GAC catalyst and application of alpha-FeOOH/GAC catalyst in degrading nitrobenzene wastewater in high gravity field
CN113764664A (en) * 2020-07-16 2021-12-07 住友大阪水泥股份有限公司 Carbon material carrying metal-adsorbing material, positive electrode for lithium ion secondary battery, positive electrode material, and lithium ion secondary battery
CN112570024A (en) * 2020-12-28 2021-03-30 青岛科技大学 Ag/AgCl/IL/FeOOH/AC photocatalytic material and preparation and application thereof

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