CN109317122A - A kind of modified alkali lignin and preparation method thereof and application as heavy metal ion agent for capturing - Google Patents

A kind of modified alkali lignin and preparation method thereof and application as heavy metal ion agent for capturing Download PDF

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Publication number
CN109317122A
CN109317122A CN201811345781.2A CN201811345781A CN109317122A CN 109317122 A CN109317122 A CN 109317122A CN 201811345781 A CN201811345781 A CN 201811345781A CN 109317122 A CN109317122 A CN 109317122A
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alkali lignin
preparation
modified alkali
heavy metal
metal ion
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郑春莉
王巧蕊
沈振兴
范宇睿
程星星
章剑羽
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Xian Jiaotong University
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Xian Jiaotong 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
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
    • 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
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0262—Compounds of O, S, Se, Te
    • B01J20/0266—Compounds of S
    • 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
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • 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
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • 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
    • C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
    • 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

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

The invention belongs to heavy metal ion agent for capturing fields, are specifically related to a kind of modified alkali lignin and its preparation method and application of heavy-metal ion removal.The present invention is using alkali lignin as basic raw material, by the way that the substances such as amine substance, aldehyde compound and carbon disulfide are added, it is further modified to it using amine substance and carbon disulfide, with the surface functional group for increasing its specific surface area, increasing porosity, increasing alkali lignin, to be conducive to the removal of heavy metal ion；Modified alkali lignin is prepared using environment friendly and pollution-free reagent, it is degradable, environment will not be polluted.

Description

A kind of modified alkali lignin and preparation method thereof and as heavy metal ion agent for capturing Using
Technical field
The invention belongs to heavy metal ion agent for capturing fields, are specifically related to a kind of modification alkali wood of heavy-metal ion removal Quality and its preparation method and application.
Background technique
In the late three decades, with the rapid development of our country's economy, ecological environment security and public population health are continuous Threat by heavy metals all kinds of in environment.Toxic heavy metal in environment mainly includes lead, copper, cadmium, chromium, mercury etc., main From industrial production, agricultural fertilizer, municipal refuse landfill, sewage treatment etc..Most of heavy metals include lead, chromium, cadmium and mercury Be considered as carcinogen, in the environment there is persistence and long-term accumulated, and can further pass through the richness of food chain Collection absorbs, finally by human consumption to cause to seriously threaten to human health.And heavy metal such as copper is indispensable element to body, It plays irreplaceable role for important enzyme site in body metabolism system, but excessively also results in the damage of body Evil.
In recent years, have much about the report of heavy-metal ion removal method such as chemical precipitation, reverse osmosis technology, absorption Method, flocculence etc..Wherein, due to absorption method have the characteristics that it is easy to operate, at low cost and convenient for recycling and it is wide General use.For adsorbent, common adsorbent is active carbon, zeolite molecular sieve etc., there are also some high molecular synthetic materials, But active carbon and zeolite molecular sieve are primarily adapted for use in the wastewater treatment of organic matter as universal adsorbent, are not suitable for weight The adsorption treatment of metal ion, and some other high molecular material, synthesis cost is high, has certain limitation.
Lignin is that one kind is only second to cellulose, and second organic polymer is come for total amount in the world.Its is from a wealth of sources, The spent pulping liquor of main vegetation crop and commercial paper mills including nature.The vegetation crop of nature is from a wealth of sources, materials It is convenient, and the spent pulping liquor in paper mill is also important sources, and it has the features such as biodegrade is difficult, and processing is complicated, if Unprocessed or processing is not exclusively discharged directly into environment, not only results in the destruction of environment, and can be the one of resource Big waste.Lignin is a kind of compound of complexity, contains a large amount of phenolic hydroxyl group, alcohol carboxyl, methoxyl group, carboxyl functional group Deng there is certain heavy metal detergent power, but it is lower to the processing capacity of heavy metal ion.
Summary of the invention
It is captured the purpose of the present invention is to provide a kind of modified alkali lignin and preparation method thereof and as heavy metal ion The application of agent overcomes traditional alkali lignin problem low to heavy metal ion removal rate.The present invention is by following technology Scheme is realized:
A kind of preparation method of modified alkali lignin disclosed by the invention, comprising the following steps:
1) take raw material alkali lignin, emulsifier, amine substance, alkaline solution and water, at room temperature, mix well, Mixed solution is made；
2) aldehyde compound is added dropwise into mixed solution, then under conditions of normal temperature and pressure, by mixed system by Room temperature keeps 4~6h to 90~120 DEG C, then under normal temperature and pressure conditions, the temperature of mixed system is reduced to 30~ 45 DEG C, carbon disulfide is added dropwise, then reacts 2~4h；
3) demulsifier is added into the solution after step 2) reaction, is then filtered, is washed, obtain moist solid powder End is most dried afterwards, and modified alkali lignin is made.
Preferably, in step 1), alkali lignin, emulsifier, amine substance, alkaline solution and water amount ratio be (2~6) G:(75~150) mL:(5~15) mL:(10~15) mL:(75~80) mL.
Preferably, in step 2), the amount ratio of alkali lignin and aldehyde compound is (2~6) g:(10~20) mL；Alkali wood The amount ratio of quality and carbon disulfide is (2~6) g:(10~20) mL；In step 3), the amount ratio of alkali lignin and demulsifier For (2~6) g:(80~120) mL.
Preferably, alkaline solution uses concentration for the sodium hydroxide solution of 0.2~0.5mol/L or potassium hydroxide solution.
Preferably, amine substance is branched polyethylenimine.
Preferably, the aldehyde compound is formaldehyde or glutaraldehyde；The demulsifier is ethyl alcohol or petroleum ether.
Preferably, the emulsifier is the mixture of paraffin, Span-80 and Tween；And paraffin: Span80:Tween Volume ratio=75~90:4~6:4~6.
Preferably, alkali lignin is made by natural vegetation or paper pulp waste.
The invention also discloses adopt the modified alkali lignin prepared with the aforedescribed process.
The invention also discloses the applications using above-mentioned modified alkali lignin as heavy metal ion agent for capturing, for going Except the heavy metal ion in waste water.
Compared with prior art, the invention has the following beneficial technical effects:
Modified alkali lignin and preparation method thereof disclosed by the invention for heavy-metal ion removal, is made with alkali lignin Amine substance and carbon disulfide are used by the way that the substances such as amine substance, aldehyde compound and carbon disulfide are added for basic raw material It is further modified to it, to increase its specific surface area, increase porosity, increase the surface functional group of alkali lignin, to be conducive to The removal of heavy metal ion；Modified alkali lignin is prepared using environment friendly and pollution-free reagent, it is degradable, dirt not will cause to environment Dye.Preparation method of the invention is simple, and yield is high, and controllability is good, and repeatability is high, is suitble to large-scale production.
Further, alkali lignin needed for preparation method is from a wealth of sources, mainly passes through the vegetation of nature and makes The spent pulping liquor of paper plant obtains, and reduces the cost of production process.
Modified alkali lignin prepared by the present invention for heavy-metal ion removal has porous performance, possesses abundant Surface functional group, and increase a possibility that lignin is applied to the processing of practical effluent containing heavy metal ions.
There is good removal ability to heavy metal ion in water through modified alkali lignin prepared by the present invention, can be used as Heavy metal ion agent for capturing, for the removal and purification of heavy metal ion in water, removal efficiency is high, can be recycled.
Detailed description of the invention
Fig. 1 is scanning electron microscope (SEM) figure of the modified alkali lignin of heavy-metal ion removal prepared by the present invention；
Fig. 2 is the FTIR spectrum (FTIR) of the modified alkali lignin of heavy-metal ion removal prepared by the present invention Figure.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and It is not to limit.
Implementation column 1
A kind of preparation method of the modified alkali lignin of heavy-metal ion removal, comprising the following steps:
(1) at room temperature (25 DEG C), distilled water 80mL, alkali lignin 6g, alkaline substance solution (0.5mol/ is added L) 15mL, sequentially adds Span-80 5mL, paraffin 75mL, Tween 5mL, branched polyethylenimine 8mL, mixture room temperature Stir 1-2h.
(2) 10mL formaldehyde is added dropwise into treated mixed solution, under conditions of normal temperature and pressure, uses electricity Pyromagnetic force blender is to slowly warm up to 90 DEG C, and mixed solution keeps 5h.
(3) again under normal temperature and pressure conditions, the temperature of the mixed solution of step (2) is slowly lowered to 40 DEG C, delayed simultaneously It is slow to be added dropwise carbon disulfide 12mL, and in reacting 3h under the conditions of 40 DEG C.
(4) petroleum ether 100mL is added in the solution after step 3) reaction, is filtered and washed with a large amount of ethyl alcohol and distilled water It washs, obtains moist solid powder, by vacuum freeze drying 12h, obtaining dry solid powder is modified alkali lignin, The structure and morphology and functional group's feature of product are shown in Fig. 1 and Fig. 2 respectively.
It will be seen from figure 1 that increasing by modified alkali lignin pore structure prepared by preparation method of the invention, can be used for Go the heavy metal ion in water removal.
Weigh the heavy metal lead ion that modified alkali lignin 0.05g and the 50mL concentration prepared in embodiment 1 is 30mg/L Waste water is added in the beaker of 250mL, is placed under conditions of 25 DEG C of horizontal shaker constant temperature, after persistent oscillation 120 minutes, sampled Filter, effluent containing heavy metal ions using inductively coupled plasma emission spectrography (ICP-OES) to simulation treated concentration It is measured, obtaining porous alkali lignin heavy metal chelating agent is 79.9mg/g to the adsorbance of lead ion.
Weigh the heavy metal cadmium ion that modified alkali lignin 0.05g and the 50mL concentration prepared in embodiment 1 is 30mg/L Waste water is added in the beaker of 250mL, is placed under conditions of 25 DEG C of horizontal shaker constant temperature, after persistent oscillation 120 minutes, sampled Filter, effluent containing heavy metal ions using inductively coupled plasma emission spectrography (ICP-OES) to simulation treated concentration It is measured, obtaining porous alkali lignin heavy metal chelating agent is 67.5mg/g to the adsorbance of cadmium ion.
Embodiment 2
A kind of preparation method of the modified alkali lignin of heavy-metal ion removal, comprising the following steps:
(1) at room temperature (25 DEG C), 5g alkali lignin and 80mL distilled water are added into three-neck flask, is configured to water Solution, it is 0.5mol/L sodium hydroxide solution 15mL that concentration, which is added dropwise, into aqueous solution, sequentially adds Span-80 5mL, paraffin 70mL, Tween 5mL, branched polyethylenimine 8mL, stir 2h after dripping.
(2) 10mL glutaraldehyde is added dropwise into treated mixed solution, under conditions of normal temperature and pressure, will mix Solution is to slowly warm up to 100 DEG C using electric heating magnetic stirring apparatus, and mixed solution keeps 4h.
(3) again under normal temperature and pressure conditions, the temperature of mixed solution is slowly lowered to 35 DEG C, while two sulphur is slowly added dropwise Change carbon 15mL, mixed solution is reacted into 4h under the conditions of 35 DEG C.
(4) petroleum ether 100mL is added in mixed solution, is filtered and is washed with a large amount of ethyl alcohol and distilled water, obtain tide Wet solid powder, by vacuum freeze drying 12h, obtaining dry solid powder is product of the invention, the knot of product Configuration looks and functional group's feature are shown in Fig. 1 and Fig. 2 respectively.
Weigh the heavy metal lead ion that modified alkali lignin 0.05g and the 50mL concentration prepared in embodiment 2 is 30mg/L Waste water is added in the beaker of 250mL, is placed under conditions of 25 DEG C of horizontal shaker constant temperature, after persistent oscillation 120 minutes, sampled Filter, effluent containing heavy metal ions using inductively coupled plasma emission spectrography (ICP-OES) to simulation treated concentration It is measured, obtaining porous alkali lignin heavy metal chelating agent is 78.6mg/g to the adsorbance of lead ion.
Weigh the heavy metal cadmium ion that modified alkali lignin 0.05g and the 50mL concentration prepared in embodiment 2 is 30mg/L Waste water is added in the beaker of 250mL, is placed under conditions of 25 DEG C of horizontal shaker constant temperature, after persistent oscillation 120 minutes, sampled Filter, effluent containing heavy metal ions using inductively coupled plasma emission spectrography (ICP-OES) to simulation treated concentration It is measured, obtaining porous alkali lignin heavy metal chelating agent is 66.5mg/g to the adsorbance of cadmium ion.
Implementation column 3
A kind of preparation method of the modified alkali lignin of heavy-metal ion removal, comprising the following steps:
(1) at room temperature (25 DEG C), 2g alkali lignin and 75mL distilled water are added into three-neck flask, is configured to water The sodium hydroxide solution 10mL that concentration is 0.2mol/L is added dropwise into aqueous solution, sequentially adds Span-80 5mL, stone for solution Wax 65mL, Tween 5mL, branched polyethylenimine 5mL, stir 1h after dripping.
(2) 12mL formaldehyde is added dropwise into treated mixed solution, under conditions of normal temperature and pressure, will mix molten Liquid is to slowly warm up to 90 DEG C using electric heating magnetic stirring apparatus, and mixed solution keeps 4h.
(3) again under normal temperature and pressure conditions, the temperature of mixed solution is slowly lowered to 30 DEG C, while two sulphur is slowly added dropwise Change carbon 10mL, mixed solution is reacted into 2h under the conditions of 30 DEG C.
(4) petroleum ether 80mL is added in mixed solution, is filtered and is washed with a large amount of ethyl alcohol and distilled water, obtain humidity Solid powder, by vacuum freeze drying 12h, obtaining dry solid powder is product of the invention.
Weigh the heavy metal lead ion that modified alkali lignin 0.05g and the 50mL concentration prepared in embodiment 3 is 30mg/L Waste water is added in the beaker of 250mL, is placed under conditions of 25 DEG C of horizontal shaker constant temperature, after persistent oscillation 120 minutes, sampled Filter, effluent containing heavy metal ions using inductively coupled plasma emission spectrography (ICP-OES) to simulation treated concentration It is measured, obtaining porous alkali lignin heavy metal chelating agent is 75.6mg/g to the adsorbance of lead ion.
Weigh the heavy metal cadmium ion that modified alkali lignin 0.05g and the 50mL concentration prepared in embodiment 3 is 30mg/L Waste water is added in the beaker of 250mL, is placed under conditions of 25 DEG C of horizontal shaker constant temperature, after persistent oscillation 120 minutes, sampled Filter, effluent containing heavy metal ions using inductively coupled plasma emission spectrography (ICP-OES) to simulation treated concentration It is measured, obtaining porous alkali lignin heavy metal chelating agent is 65.5mg/g to the adsorbance of cadmium ion.
Implementation column 4
A kind of preparation method of the modified alkali lignin of heavy-metal ion removal, comprising the following steps:
(1) at room temperature (25 DEG C), 4g alkali lignin and 78mL distilled water are added into three-neck flask, is configured to water The sodium hydroxide solution 12mL that concentration is 0.3mol/L is added dropwise into aqueous solution, sequentially adds Span-80 10mL, stone for solution Wax 80mL, Tween 10mL, branched polyethylenimine 10mL, stir 1h after dripping.
(2) 15mL glutaraldehyde is added dropwise into treated mixed solution, under conditions of normal temperature and pressure, will mix Solution is to slowly warm up to 120 DEG C using electric heating magnetic stirring apparatus, and mixed solution keeps 4h.
(3) again under normal temperature and pressure conditions, the temperature of mixed solution is slowly lowered to 45 DEG C, while two sulphur is slowly added dropwise Change carbon 20mL, mixed solution is reacted into 3h under the conditions of 45 DEG C.
(4) ethyl alcohol 120mL is added in mixed solution, then is filtered and is washed with a large amount of ethyl alcohol and distilled water, obtains tide Wet solid powder, by vacuum freeze drying 12h, obtaining dry solid powder is product of the invention.
Weigh the heavy metal lead ion that modified alkali lignin 0.05g and the 50mL concentration prepared in embodiment 4 is 30mg/L Waste water is added in the beaker of 250mL, is placed under conditions of 25 DEG C of horizontal shaker constant temperature, after persistent oscillation 120 minutes, sampled Filter, effluent containing heavy metal ions using inductively coupled plasma emission spectrography (ICP-OES) to simulation treated concentration It is measured, obtaining porous alkali lignin heavy metal chelating agent is 79.6mg/g to the adsorbance of lead ion.
Weigh the heavy metal cadmium ion that modified alkali lignin 0.05g and the 50mL concentration prepared in embodiment 4 is 30mg/L Waste water is added in the beaker of 250mL, is placed under conditions of 25 DEG C of horizontal shaker constant temperature, after persistent oscillation 120 minutes, sampled Filter, effluent containing heavy metal ions using inductively coupled plasma emission spectrography (ICP-OES) to simulation treated concentration It is measured, obtaining porous alkali lignin heavy metal chelating agent is 66.5mg/g to the adsorbance of cadmium ion.

Claims (10)

1. a kind of preparation method of modified alkali lignin, which comprises the following steps:
1) it takes raw material alkali lignin, emulsifier, amine substance, alkaline solution and water, at room temperature, mix well, is made Mixed solution；
2) aldehyde compound is added dropwise into mixed solution, then under conditions of normal temperature and pressure, by mixed system by room temperature 90~120 DEG C are warming up to, keeps 4~6h that the temperature of mixed system is then under normal temperature and pressure conditions reduced to 30~45 DEG C, carbon disulfide is added dropwise, then reacts 2~4h；
3) demulsifier is added into the solution after step 2) reaction, is then filtered, is washed, obtain moist solid powder, It is most dried afterwards, modified alkali lignin is made.
2. the preparation method of modified alkali lignin according to claim 1, which is characterized in that in step 1), alkali lignin, Emulsifier, amine substance, alkaline solution and water amount ratio be (2~6) g:(75~150) mL:(5~15) mL:(10~15) ML:(75~80) mL.
3. the preparation method of modified alkali lignin according to claim 1, which is characterized in that in step 2), alkali lignin Amount ratio with aldehyde compound is (2~6) g:(10~20) mL；The amount ratio of alkali lignin and carbon disulfide is (2~6) g: (10~20) mL；In step 3), the amount ratio of alkali lignin and demulsifier is (2~6) g:(80~120) mL.
4. the preparation method of modified alkali lignin according to claim 1, which is characterized in that alkaline solution use concentration for The sodium hydroxide solution or potassium hydroxide solution of 0.2~0.5mol/L.
5. the preparation method of modified alkali lignin according to claim 1, which is characterized in that amine substance is the poly- second of branch Alkene imines.
6. the preparation method of modified alkali lignin according to claim 1, which is characterized in that the aldehyde compound is first Aldehyde or glutaraldehyde；The demulsifier is ethyl alcohol or petroleum ether.
7. the preparation method of modified alkali lignin according to claim 1, which is characterized in that the emulsifier is stone The mixture of wax, Span-80 and Tween；And paraffin: volume ratio=75 of Span80:Tween~90:4~6:4~6.
8. the preparation method of modified alkali lignin according to claim 1, which is characterized in that alkali lignin is by natural vegetation Or paper pulp waste is made.
9. using the modified alkali lignin of method preparation described in any one of claim 1~8.
10. application of the modified alkali lignin as claimed in claim 9 as heavy metal ion agent for capturing, which is characterized in that be used for Remove the heavy metal ion in waste water.
CN201811345781.2A 2018-11-13 2018-11-13 A kind of modified alkali lignin and preparation method thereof and application as heavy metal ion agent for capturing Pending CN109317122A (en)

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CN109912804A (en) * 2019-03-28 2019-06-21 南京林业大学 A kind of preparation method of phosphorus nitrogen modified lignin resin base expansibility flame-proof agent
CN110142026A (en) * 2019-05-27 2019-08-20 湖南农业大学 The alkali lignin base charcoal efficient absorption material of cadmium, preparation method and applications in adsorbed water body
CN110218337A (en) * 2019-07-02 2019-09-10 南方科技大学 Water-soluble lignin chelating agent and preparation method and application thereof
CN111039629A (en) * 2019-10-08 2020-04-21 水利部交通运输部国家能源局南京水利科学研究院 Method for preparing artificial stone by using dredged sludge and rotary furnace bottom ash of iron and steel plant
CN111389375A (en) * 2020-04-14 2020-07-10 广西博世科环保科技股份有限公司 Preparation and adsorption method of heavy metal ion adsorbent
CN114522673A (en) * 2022-04-12 2022-05-24 四川大学 Application of alkali lignin adsorbent in adsorption of actinide heavy metals

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109912804A (en) * 2019-03-28 2019-06-21 南京林业大学 A kind of preparation method of phosphorus nitrogen modified lignin resin base expansibility flame-proof agent
CN109912804B (en) * 2019-03-28 2021-04-02 南京林业大学 Preparation method of phosphorus-nitrogen modified lignin-based intumescent flame retardant
CN110142026A (en) * 2019-05-27 2019-08-20 湖南农业大学 The alkali lignin base charcoal efficient absorption material of cadmium, preparation method and applications in adsorbed water body
CN110218337A (en) * 2019-07-02 2019-09-10 南方科技大学 Water-soluble lignin chelating agent and preparation method and application thereof
CN110218337B (en) * 2019-07-02 2021-10-08 南方科技大学 Water-soluble lignin chelating agent and preparation method and application thereof
CN111039629A (en) * 2019-10-08 2020-04-21 水利部交通运输部国家能源局南京水利科学研究院 Method for preparing artificial stone by using dredged sludge and rotary furnace bottom ash of iron and steel plant
CN111039629B (en) * 2019-10-08 2021-08-17 水利部交通运输部国家能源局南京水利科学研究院 Method for preparing artificial stone by using dredged sludge and rotary furnace bottom ash of iron and steel plant
CN111389375A (en) * 2020-04-14 2020-07-10 广西博世科环保科技股份有限公司 Preparation and adsorption method of heavy metal ion adsorbent
CN114522673A (en) * 2022-04-12 2022-05-24 四川大学 Application of alkali lignin adsorbent in adsorption of actinide heavy metals

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