CN108325509A - A kind of environment-friendly type water pollution sorbing material and preparation method thereof - Google Patents
A kind of environment-friendly type water pollution sorbing material and preparation method thereof Download PDFInfo
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- 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
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- B01J20/28083—Pore diameter being in the range 2-50 nm, i.e. mesopores
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2303/02—Odour removal or prevention of malodour
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Abstract
The invention discloses a kind of environment-friendly type waters to pollute sorbing material and preparation method thereof, adsorbent material compositions include 10 30 parts of nano-tourmaline in parts by weight, 10 20 parts of modified activated carbon, 8 16 parts of modified graphene oxide, 4 12 parts of pyrophillite, 5 12 parts of montmorillonite, 4 10 parts of alumina silicate fine powder, 28 parts of bamboo fibre, 10 20 parts of perforate expanded perlite, 10 20 parts of hollow glass micropearl, 5 16 parts of ester cerotin, join 5 12 parts of carboxymethyl starch, 4 10 parts of hydroxy propyl cellulose graft copolymer, preparation method of the present invention is simple, sorbing material obtained can be in effective absorption effluent heavy metal, suspended matter, secondary pollution will not be caused to water quality simultaneously.
Description
Technical field
The present invention relates to technical field of adsorption material preparation, specially a kind of environment-friendly type water pollution sorbing material and its preparation
Method.
Background technology
With the continuous social and economic development, industrial and agricultural wastewater discharge capacity is increasing.Data are shown according to investigations：China day
Right lake is about 9,100,000 km2, wherein 85% has different degrees of eutrophication, 50% lake surface moderate or more occur
Eutrophication makes water ecosystem by destructive strike.In order to meet the needs and reality of human social
The harmonious development of existing man and nature, the research and practice of polluted water body reparation become current hotspot problem.
For polluted-water Treatment process there are many, from the point of view of the mode of improvement, be broadly divided into three categories：Physics is administered
Method, chemical harnessing method and biology and ecological treatment method.Physical method mainly has section dirty (a control external source), bed mud to dredge
The technologies such as shuttle, watercourse aeration and diversion water transfer.Such as 2007 in order to alleviate Blue-green Algae Fast Growth initiation water supply crisis, directly from
2,700,000,000 m of the Changjiang river tune3Water enters Taihu Lake.Chemical method to water body mainly by adding chemical agent and other flocculation sediments
Agent etc., reaching reduces water body COD, the purpose of nitrogen, phosphorus, heavy metal, algae in removal water body.Biology and ecological reestablishment master
There are microbial treatment technology, Artificial Wetland Techniques, phytoremediation technology etc..
Present sewage disposal situation allows of no optimist, and sewage disposal does not generally make a huge sum of money by adding reducing agent into waste water
Belong to ion reduction and removing and those of be present in waste water metal ion, iron powder etc. and is used as reducing agent, easily causes secondary pollution.
Invention content
The purpose of the present invention is to provide a kind of environment-friendly type waters to pollute sorbing material and preparation method thereof, to solve the above-mentioned back of the body
The problem of being proposed in scape technology.
To achieve the above object, the present invention provides the following technical solutions：A kind of environment-friendly type water pollution sorbing material, adsorption material
Expect that component includes in parts by weight：10-30 parts of nano-tourmaline, 10-20 parts of modified activated carbon, modified graphene oxide 8-16
Part, 4-12 parts of pyrophillite, 5-12 parts of montmorillonite, 4-10 parts of alumina silicate fine powder, 2-8 parts of bamboo fibre, perforate expanded perlite 10-20
Part, 10-20 parts of hollow glass micropearl, 5-16 parts of ester cerotin, 5-12 parts of carboxymethyl starch of connection, hydroxy propyl cellulose graft copolymer
4-10 parts.
Preferably, adsorbent material compositions include in parts by weight：20 parts of nano-tourmaline, changes 15 parts of modified activated carbon
12 parts of graphene oxide of property, 8 parts of pyrophillite, 9 parts of montmorillonite, 7 parts of alumina silicate fine powder, 5 parts of bamboo fibre, perforate expanded perlite 15
Part, 15 parts of hollow glass micropearl, 12 parts of ester cerotin, 9 parts of carboxymethyl starch of connection, 7 parts of hydroxy propyl cellulose graft copolymer.
A kind of preparation method of the environment-friendly type water pollution sorbing material, preparation method includes the following steps：
S1, by nano-tourmaline, modified activated carbon, modified graphene oxide, pyrophillite, montmorillonite, trepanning expanded pearlite
It is added in pulverizer and crushes after rock, hollow glass micropearl mixing, pulverizer rotating speed is 2000-4000 revs/min, and grinding time is
10min-30min crosses 80 mesh sieve, obtains mixture A later；
S2, by modified graphene oxide, alumina silicate fine powder, bamboo fibre, ester cerotin, connection carboxymethyl starch, hydroxy propyl cellulose
Stirring at low speed in stirred tank is added after plain graft copolymer mixing, stir speed (S.S.) is 200-400 revs/min, and mixing time is
30min-50min obtains mixture B；
S3, mixture B is added in mixture A, calcining is added in calcining furnace after being sufficiently mixed to get to sorbing material.
Preferably, it is 300-400 DEG C that furnace temperature is calcined in the step S3, calcination time 2h-3h.
Preferably, mixture B is added in mixture A in the S3 steps, further includes that in equal volume a concentration of is added
The sodium bicarbonate solution of mass fraction 10-50% impregnates 1-2 hours processes.
Preferably, it is 5 DEG C/min that the step S3, which further includes temperature-rise period heating rate,.
Compared with prior art, the beneficial effects of the invention are as follows：Preparation method of the present invention is simple, sorbing material energy obtained
Heavy metal, suspended matter in enough effective absorption effluents, while secondary pollution will not be caused to water quality；Wherein, add in the present invention
Modified activated carbon, the modified graphene oxide added can effectively remove the peculiar smell in water, while can also adsorb poisonous and harmful
Substance；Alumina silicate fine powder, the bamboo fibre of addition can be good at adsorbing heavy metal ion, play the work to purify water well
With；In addition, the preparation method that the present invention uses is easy to operate, at low cost, sorbing material obtained can recycle, preferably
The calcining furnace temperature that uses of preparation method for being the present invention is 300-400 DEG C, and calcination time is that 2h-3h can effective stability contorting burning
The structure of product is tied, wherein modified activated carbon, modified graphene oxide, alumina silicate fine powder, bamboo fibre can form rock-steady structure；And
And control furnace temperature heating rate be 5 DEG C/min, can make modified activated carbon in the present invention, modified graphene oxide, alumina silicate fine powder,
The gap structure of bamboo fibre is uniformly distributed, prevent from heating up it is too fast cause hole big, the uneven production efficiency of the slow distribution of pores that heats up
Low, preparation method of the invention further includes that mixture B is added in mixture A in S3 steps, further includes that in equal volume dense is added
Degree is that the sodium bicarbonate solution of mass fraction 10-50% impregnates 1-2 hours processes, can dramatically increase the present invention in sintering process
The porosity and the hole uniformity of product increase specific surface area, enhance the adsorptivity of the present invention.
Specific implementation mode
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
The every other embodiment that art personnel are obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides the following technical solutions：A kind of environment-friendly type water pollution sorbing material, adsorbent material compositions are by weight
Number include 10-30 parts of nano-tourmaline, 10-20 parts of modified activated carbon, 8-16 parts of modified graphene oxide, 4-12 parts of pyrophillite,
5-12 parts of montmorillonite, 4-10 parts of alumina silicate fine powder, 2-8 parts of bamboo fibre, 10-20 parts of perforate expanded perlite, hollow glass micropearl
10-20 parts, 5-16 parts of ester cerotin, connection 5-12 parts of carboxymethyl starch, 4-10 parts of hydroxy propyl cellulose graft copolymer.
Embodiment 1
Adsorbent material compositions include 10 parts of nano-tourmaline, 10 parts of modified activated carbon, modified graphite oxide in parts by weight
8 parts of alkene, 4 parts of pyrophillite, 5 parts of montmorillonite, 4 parts of alumina silicate fine powder, 2 parts of bamboo fibre, 10 parts of perforate expanded perlite, hollow glass
10 parts of microballon, 5 parts of ester cerotin, 5 parts of carboxymethyl starch of connection, 4 parts of hydroxy propyl cellulose graft copolymer.
The preparation method of the present embodiment includes the following steps：
S1, by nano-tourmaline, modified activated carbon, modified graphene oxide, pyrophillite, montmorillonite, trepanning expanded pearlite
It being added in pulverizer and crushes after rock, hollow glass micropearl mixing, pulverizer rotating speed is 2000 revs/min, grinding time 30min,
80 mesh sieve is crossed later, obtains mixture A；
S2, by modified graphene oxide, alumina silicate fine powder, bamboo fibre, ester cerotin, connection carboxymethyl starch, hydroxy propyl cellulose
Stirring at low speed in stirred tank is added after plain graft copolymer mixing, stir speed (S.S.) is 200 revs/min, and mixing time 50min is obtained
To mixture B；
S3, mixture B is added in mixture A, calcining is added in calcining furnace after being sufficiently mixed to get to sorbing material,
Test sorbing material, specific surface area 292m are carried out with Belsorp Max types physical adsorption appearances2/ g, Kong Rongwei 0.38cm3/g、
Average pore size is 5.23nm.
Embodiment 2
Adsorbent material compositions include 30 parts of nano-tourmaline, 20 parts of modified activated carbon, modified graphite oxide in parts by weight
It is 16 parts of alkene, 12 parts of pyrophillite, 12 parts of montmorillonite, 10 parts of alumina silicate fine powder, 8 parts of bamboo fibre, 20 parts of perforate expanded perlite, hollow
20 parts of glass microballoon, 16 parts of ester cerotin, 12 parts of carboxymethyl starch of connection, 10 parts of hydroxy propyl cellulose graft copolymer.
The preparation method of the present embodiment includes the following steps：
S1, by nano-tourmaline, modified activated carbon, modified graphene oxide, pyrophillite, montmorillonite, trepanning expanded pearlite
It being added in pulverizer and crushes after rock, hollow glass micropearl mixing, pulverizer rotating speed is 4000 revs/min, grinding time 10min,
80 mesh sieve is crossed later, obtains mixture A；
S2, by modified graphene oxide, alumina silicate fine powder, bamboo fibre, ester cerotin, connection carboxymethyl starch, hydroxy propyl cellulose
Stirring at low speed in stirred tank is added after plain graft copolymer mixing, stir speed (S.S.) is 400 revs/min, and mixing time 30min is obtained
To mixture B；
S3, mixture B is added in mixture A, the sodium bicarbonate that isometric a concentration of mass fraction 10% is added is molten
Liquid immersion is added in calcining furnace after being sufficiently mixed within 1 hour and calcines, and it is 300 DEG C that furnace temperature is calcined in the step S3, temperature-rise period
Heating rate is 5 DEG C/min, and it is that 2h obtains sorbing material to be warming up to 300 DEG C of calcination times, is inhaled with Belsorp Max type physics
Attached instrument carries out test sorbing material, specific surface area 439m2/ g, Kong Rongwei 0.47cm3/ g, average pore size 5.83nm.
Embodiment 3
Adsorbent material compositions include 15 parts of nano-tourmaline, 12 parts of modified activated carbon, modified graphite oxide in parts by weight
10 parts of alkene, 6 parts of pyrophillite, 7 parts of montmorillonite, 6 parts of alumina silicate fine powder, 3 parts of bamboo fibre, 12 parts of perforate expanded perlite, hollow glass
12 parts of glass microballon, 7 parts of ester cerotin, 7 parts of carboxymethyl starch of connection, 6 parts of hydroxy propyl cellulose graft copolymer.
The preparation method of the present embodiment includes the following steps：
S1, by nano-tourmaline, modified activated carbon, modified graphene oxide, pyrophillite, montmorillonite, trepanning expanded pearlite
It being added in pulverizer and crushes after rock, hollow glass micropearl mixing, pulverizer rotating speed is 3000 revs/min, grinding time 20min,
80 mesh sieve is crossed later, obtains mixture A；
S2, by modified graphene oxide, alumina silicate fine powder, bamboo fibre, ester cerotin, connection carboxymethyl starch, hydroxy propyl cellulose
Stirring at low speed in stirred tank is added after plain graft copolymer mixing, stir speed (S.S.) is 300 revs/min, and mixing time 40min is obtained
To mixture B；
S3, mixture B is added in mixture A, the sodium bicarbonate that isometric a concentration of mass fraction 50% is added is molten
Liquid immersion is added in calcining furnace after being sufficiently mixed within 2 hours and calcines, and it is 400 DEG C that furnace temperature is calcined in the step S3, temperature-rise period
Heating rate is 5 DEG C/min, and it is that 3h obtains sorbing material to be warming up to 300-400 DEG C of calcination time, with BelsorpMax type objects
Reason adsorption instrument carries out test sorbing material, specific surface area 452m2/ g, Kong Rongwei 0.41cm3/ g, average pore size are
6.12nm。。
Embodiment 4
Adsorbent material compositions include 25 parts of nano-tourmaline, 18 parts of modified activated carbon, modified graphite oxide in parts by weight
It is 14 parts of alkene, 10 parts of pyrophillite, 10 parts of montmorillonite, 8 parts of alumina silicate fine powder, 7 parts of bamboo fibre, 18 parts of perforate expanded perlite, hollow
18 parts of glass microballoon, 14 parts of ester cerotin, 10 parts of carboxymethyl starch of connection, 8 parts of hydroxy propyl cellulose graft copolymer.
The preparation method of the present embodiment includes the following steps：
S1, by nano-tourmaline, modified activated carbon, modified graphene oxide, pyrophillite, montmorillonite, trepanning expanded pearlite
It being added in pulverizer and crushes after rock, hollow glass micropearl mixing, pulverizer rotating speed is 3500 revs/min, grinding time 25min,
80 mesh sieve is crossed later, obtains mixture A；
S2, by modified graphene oxide, alumina silicate fine powder, bamboo fibre, ester cerotin, connection carboxymethyl starch, hydroxy propyl cellulose
Stirring at low speed in stirred tank is added after plain graft copolymer mixing, stir speed (S.S.) is 250 revs/min, and mixing time 45min is obtained
To mixture B；
S3, mixture B is added in mixture A, the sodium bicarbonate that isometric a concentration of mass fraction 40% is added is molten
Liquid immersion is added in calcining furnace after being sufficiently mixed within 1.5 hours and calcines, and it is 350 DEG C that furnace temperature is calcined in the step S3, is heated up
Journey heating rate is 5 DEG C/min, and it is that 3.5h obtains sorbing material to be warming up to 350 DEG C of calcination times, with Belsorp Max type objects
Reason adsorption instrument carries out test sorbing material, specific surface area 443m2/ g, Kong Rongwei 0.46cm3/ g, average pore size 5.62nm.
Embodiment 5
Adsorbent material compositions include 20 parts of nano-tourmaline, 15 parts of modified activated carbon, modified graphite oxide in parts by weight
12 parts of alkene, 8 parts of pyrophillite, 9 parts of montmorillonite, 7 parts of alumina silicate fine powder, 5 parts of bamboo fibre, 15 parts of perforate expanded perlite, hollow glass
15 parts of glass microballon, 12 parts of ester cerotin, 9 parts of carboxymethyl starch of connection, 7 parts of hydroxy propyl cellulose graft copolymer.
The preparation method of the present embodiment includes the following steps：
S1, by nano-tourmaline, modified activated carbon, modified graphene oxide, pyrophillite, montmorillonite, trepanning expanded pearlite
It being added in pulverizer and crushes after rock, hollow glass micropearl mixing, pulverizer rotating speed is 3000 revs/min, grinding time 25min,
80 mesh sieve is crossed later, obtains mixture A；
S2, by modified graphene oxide, alumina silicate fine powder, bamboo fibre, ester cerotin, connection carboxymethyl starch, hydroxy propyl cellulose
Stirring at low speed in stirred tank is added after plain graft copolymer mixing, stir speed (S.S.) is 250 revs/min, and mixing time 40min is obtained
To mixture B；
S3, mixture B is added in mixture A, the sodium bicarbonate that isometric a concentration of mass fraction 40% is added is molten
Liquid immersion is added in calcining furnace after being sufficiently mixed within 1.5 hours and calcines, and it is 380 DEG C that furnace temperature is calcined in the step S3, is heated up
Journey heating rate is 5 DEG C/min, and it is that 2.5h obtains sorbing material to be warming up to 380 DEG C of calcination times, with BelsorpMax type objects
Reason adsorption instrument carries out test sorbing material, specific surface area 486m2/ g, Kong Rongwei 0.51cm3/ g, average pore size 4.32nm.
Embodiment 6
It is same as Example 5, the difference is that preparation method：S3, mixture B is added in mixture A, is warming up to 380 DEG C
Calcination time is that 2.5h obtains sorbing material, carries out test sorbing material with Belsorp Max types physical adsorption appearances, compares table
Area is 321m2/ g, Kong Rongwei 0.40cm3/ g, average pore size 6.13nm.
Embodiment 7
It is same as Example 5, the difference is that preparation method：S3, mixture B is added in mixture A, is added isometric
The sodium bicarbonate solution immersion of a concentration of mass fraction 40% is added in calcining furnace after being sufficiently mixed within 1.5 hours and calcines, and is warming up to
380 DEG C of calcination times are that 2.5h obtains sorbing material, and test sorbing material is carried out with Belsorp Max types physical adsorption appearances,
Its specific surface area is 425m2/ g, Kong Rongwei 0.45cm3/ g, average pore size 5.3nm.
Embodiment 8
It is same as Example 5, the difference is that preparation method：S3, mixture B is added in mixture A, in the step S3
It is 380 DEG C to calcine furnace temperature, and temperature-rise period heating rate is 5 DEG C/min, and it is that 2.5h is inhaled to be warming up to 380 DEG C of calcination times
Enclosure material carries out test sorbing material, specific surface area 388m with Belsorp Max types physical adsorption appearances2/ g, Kong Rongwei
0.59cm3/ g, average pore size 5.83nm..
Experimental example：
Adsorption experiment is carried out using sorbing material made from various embodiments of the present invention, will be inhaled made from various embodiments of the present invention
Enclosure material is put into the industrial wastewater of isodose, detects heavy metals in industrial wastewater ion concentration before input and suspended matter contains
Amount detects heavy metal ion content and suspension content, obtained data such as following table again after standing 4h：
| Heavy metal ion adsorbed rate (%) | Suspended matter clearance rate (%) | |
| Embodiment 1 | 88.5 | 89.6 |
| Embodiment 2 | 92.8 | 92.7 |
| Embodiment 3 | 93.3 | 93.5 |
| Embodiment 4 | 93.5 | 93.5 |
| Embodiment 5 | 99.2 | 99.2 |
| Embodiment 6 | 91.2 | 92.1 |
| Embodiment 7 | 95.2 | 94.8 |
| Embodiment 8 | 93.1 | 93.2 |
It can be seen that preparation method of the present invention is simple, a huge sum of money that sorbing material obtained can be in effective absorption effluent
Belong to, suspended matter, while secondary pollution will not be caused to water quality；Wherein, modified activated carbon, the modified oxidized stone added in the present invention
Black alkene can effectively remove the peculiar smell in water, while can also adsorb poisonous and harmful substance；The alumina silicate fine powder of addition, bamboo
Fiber can be good at adsorbing heavy metal ion, play the role of purifying water well；In addition, the preparation side that the present invention uses
Method is easy to operate, at low cost, and sorbing material obtained can recycle, the calcining furnace temperature that preparation method of the invention uses
Be 300-400 DEG C, calcination time be 2h-3h can effective stability contorting sintered product structure, wherein modified activated carbon, modified oxygen
Graphite alkene, alumina silicate fine powder, bamboo fibre can form rock-steady structure；And it is 5 DEG C/min to control furnace temperature heating rate, can make this
Modified activated carbon in invention, modified graphene oxide, alumina silicate fine powder, bamboo fibre gap structure be uniformly distributed, prevent from heating up
Too fast to cause hole big, the uneven low production efficiency of the slow distribution of pores that heats up, preparation method of the invention further includes in S3 steps
Mixture B is added in mixture A, further includes the sodium bicarbonate solution that isometric a concentration of mass fraction 10-50% is added
The process for impregnating 1-2 hours, can dramatically increase the porosity and the hole uniformity of product of the present invention in sintering process, and table is compared in increase
Area enhances the adsorptivity of the present invention.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and embodiment shown and described herein.
Claims (6)
1. a kind of environment-friendly type water pollutes sorbing material, which is characterized in that adsorbent material compositions include in parts by weight：Nanometer is electrical
10-30 parts of stone, 10-20 parts of modified activated carbon, 8-16 parts of modified graphene oxide, 4-12 parts of pyrophillite, 5-12 parts of montmorillonite, silicon
4-10 parts of sour aluminium fine powder, 2-8 parts of bamboo fibre, 10-20 parts of perforate expanded perlite, 10-20 parts of hollow glass micropearl, ester cerotin 5-
16 parts, connection 5-12 parts of carboxymethyl starch, 4-10 parts of hydroxy propyl cellulose graft copolymer.
2. a kind of environment-friendly type water according to claim 1 pollutes sorbing material, which is characterized in that adsorbent material compositions are by weight
Measuring number includes：20 parts of nano-tourmaline, 15 parts of modified activated carbon, 12 parts of modified graphene oxide, 8 parts of pyrophillite, montmorillonite 9
Part, 7 parts of alumina silicate fine powder, 5 parts of bamboo fibre, 15 parts of perforate expanded perlite, 15 parts of hollow glass micropearl, 12 parts of ester cerotin, connection
9 parts of carboxymethyl starch, 7 parts of hydroxy propyl cellulose graft copolymer.
3. a kind of preparation method of environment-friendly type water pollution sorbing material according to claim 1, which is characterized in that it is prepared
Method includes the following steps：
S1, by nano-tourmaline, modified activated carbon, modified graphene oxide, pyrophillite, montmorillonite, perforate expanded perlite, sky
It is added in pulverizer and crushes after the mixing of heart glass microballoon, pulverizer rotating speed is 2000-4000 revs/min, grinding time 10min-
30min crosses 80 mesh sieve, obtains mixture A later；
S2, modified graphene oxide, alumina silicate fine powder, bamboo fibre, ester cerotin, connection carboxymethyl starch, hydroxypropyl cellulose are connect
Stirring at low speed in stirred tank is added after graft copolymer mixing, stir speed (S.S.) is 200-400 revs/min, mixing time 30min-
50min obtains mixture B；
S3, mixture B is added in mixture A, calcining is added in calcining furnace after being sufficiently mixed to get to sorbing material.
4. a kind of preparation method of environment-friendly type water pollution sorbing material according to claim 3, which is characterized in that the step
Calcining furnace temperature is 300-400 DEG C in rapid S3, calcination time 2h-3h.
5. a kind of preparation method of environment-friendly type water pollution sorbing material according to claim 3, which is characterized in that the S3
Mixture B is added in mixture A in step, further includes the bicarbonate that isometric a concentration of mass fraction 10-50% is added
Sodium solution impregnates 1-2 hours processes.
6. a kind of preparation method of environment-friendly type water pollution sorbing material according to claim 4, which is characterized in that the step
Rapid S3 further includes that temperature-rise period heating rate is 5 DEG C/min.
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| CN109529760A (en) * | 2019-01-25 | 2019-03-29 | 太原理工大学 | Charcoal modified montmorillonoid and preparation method |
| CN110681360A (en) * | 2019-09-11 | 2020-01-14 | 浙江海洋大学 | Preparation method of natural adsorbent for treating landfill leachate |
| CN110681371A (en) * | 2019-09-26 | 2020-01-14 | 浙江海洋大学 | Preparation method of natural adsorbent for removing heavy metal ions |
| CN111450800A (en) * | 2020-03-27 | 2020-07-28 | 浙江工业大学 | Solid-phase preparation method of carbon-pyrophyllite composite adsorption material |
| CN113024313A (en) * | 2021-04-28 | 2021-06-25 | 上海乾界生物科技有限公司 | Mycorrhizal fungi agent and preparation method thereof |
| CN114749141A (en) * | 2022-05-16 | 2022-07-15 | 南开大学 | Environmental heavy metal pollution repairing agent and preparation method and application thereof |
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