CN107890858A - A kind of tabacco straw sorbing material and preparation method thereof - Google Patents

A kind of tabacco straw sorbing material and preparation method thereof Download PDF

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Publication number
CN107890858A
CN107890858A CN201711227682.XA CN201711227682A CN107890858A CN 107890858 A CN107890858 A CN 107890858A CN 201711227682 A CN201711227682 A CN 201711227682A CN 107890858 A CN107890858 A CN 107890858A
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parts
tabacco straw
sorbing material
preparation
initiator
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宋伟
李朝艳
徐雪丽
杨艳菊
张丽
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Nanyang Institute of Technology
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Nanyang Institute of Technology
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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
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
    • 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
    • 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
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/12—Naturally occurring clays or bleaching earth
    • 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
    • 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
    • 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
    • C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic 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
    • C02F1/286—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
    • 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
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/308—Dyes; Colorants; Fluorescent agents

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  • Hydrology & Water Resources (AREA)
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  • Environmental & Geological Engineering (AREA)
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  • Dispersion Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

The invention discloses a kind of tabacco straw sorbing material, belong to sorbing material technical field, be prepared from the following raw materials in parts by weight：0.2 0.5 parts of 60 80 parts of tabacco straw, 30 50 parts of acrylic emulsion, 10 15 parts of nano-calcium carbonate, 8 12 parts of polyethylene glycol, 8 12 parts of bentonite, 10% 30 40 parts of sodium silicate solution, 5 10 parts of crosslinking agent, 0.2 0.5 parts of initiator and dibutyl tin laurate.The sorbing material is modified by tabacco straw, and the adsorption rate of sorbing material heavy metal cation and the organic matter such as methylene blue of preparation is very high, suitable for the processing of heavy metal polluted waste water or waste water from dyestuff.

Description

A kind of tabacco straw sorbing material and preparation method thereof
Technical field
The present invention relates to sorbing material technical field, more particularly, to a kind of tabacco straw sorbing material and its preparation side Method.
Background technology
China is tobacco leaf production big country, and tabacco straw is byproduct maximum in tobacco leaf production, is contained in tabacco straw big The lignin and cellulose of amount, the side for abandoning and directly burning largely is taken in the processing method of conventional tabacco straw Method, both uneconomical to also result in different degrees of environmental pollution, utilization rate is than relatively low.Tabacco straw in itself have it is porous, compare table The advantages that area is big, proportion is small, there is certain compatibility, but adsorption capacity is not strong, the main composition portion of tabacco straw Containing a variety of hydroxyls, carboxyl isoreactivity functional group on point cellulose and lignin, the chemistry such as it can be etherified, be esterified to it and being changed Property, introduce corresponding effect group.Also there is the technical scheme for being modified to tabacco straw and preparing sorbing material in the prior art.
The A of China Patent Publication No. CN 105056902 are disclosed a kind of handled using modified tabacco straw and contain anion contamination The method of thing waste water, this method carry out stalk fibre modification using the graft copolymerization of organic and inorganic cationic monomer, use hydrogen-oxygen first Change sodium solution carries out pretreatment to tabacco straw and isolates stalk cellulose, then in N2Under environmental protection, using ammonium ceric nitrate as Initiator, pretreated tabacco straw and dimethyl diallyl ammonium chloride and aluminum sulfate are subjected to graft copolymerization, system Standby novel straw is material modified, recycles this material modified dirty to organic anion pollutant in water body and inorganic anion respectively Contaminate the removal of thing, the final processing for realizing the waste water containing anionic pollutant.The technical program have good adsorption effect, it is cloudy from Sub- pollutant removing ability is strong, easy to use, cost-effective；The recycling of agricultural stalk is not only solved, while also may be used To realize that the removing to anionic pollutant in waste water is handled.The invention use tabacco straw processing method only to the moon from Sub- sewage disposal is effective, and bad to cation or organic polluting water treatment effect.
The A of China Patent Publication No. CN 105618006 disclose a kind of special stalk of the sewage disposal of adsorbing metal ions The preparation method of hydrogel composite material, it is polyvinyl alcohol 86-92 that the hydrogel, which includes component and the parts by weight of each component, Part, bentonite 0.5-4.0 parts, stalk 1.5-8 parts, 1.0 ~ 2.0 parts of boric acid.Stalk fibre cellulose fiber is used with micro-nano fibril shape Formula adds, and nanofiber hydrogel is one kind of intelligent aqueous gel, is a kind of porous material, and itself aperture is small, porous Property impart its good water holding capacity, be a kind of multi-functional sorbing material, have rapidly and efficiently, adsorption capacity is high, selection The characteristics of property is high, the absorption of heavy metal ion has significant effect, while preparation technology is simple, and cost is cheap, operable Property is strong, is had a good application prospect in sewage treatment area.Hydrogel composite material prepared by the invention is not by crosslinking Reaction, the sorbing material performance of preparation is unstable, and service life is shorter.
The content of the invention
In view of this, the purpose of the present invention is in view of the shortcomings of the prior art, there is provided tabacco straw sorbing material and its system Preparation Method, it is modified by tabacco straw, sorbing material heavy metal cation and the organic matter such as methylene blue of preparation Adsorption rate it is very high, suitable for the processing of heavy metal polluted waste water or waste water from dyestuff.
To reach above-mentioned purpose, the present invention uses following technical scheme：
A kind of tabacco straw sorbing material, is prepared from the following raw materials in parts by weight：Tabacco straw 60-80 parts, acrylic emulsion 30-50 parts, nano-calcium carbonate 10-15 parts, polyethylene glycol 8-12 parts, bentonite 8-12 parts, 10% sodium silicate solution 30-45 parts, Crosslinking agent 5-10 parts and initiator 0.2-0.5 parts and dibutyl tin laurate 0.2-0.5 parts.
Further, the crosslinking agent is N, N- methylene-bisacrylamides or divinylbenzene.
Further, the initiator is sodium peroxydisulfate or benzoyl peroxide.
A kind of preparation method of tabacco straw sorbing material, comprises the following steps：
（1）It is 100-200 mesh that tabacco straw is crushed into particle diameter, and 2-3 times of weight aqueous slkali soaking 12-24h is added after pretreatment；
（2）Then acrylic emulsion, crosslinking agent, initiator and dibutyl tin laurate are added, in 60-100 after stirring DEG C reaction 0.5-1h, adds nano-calcium carbonate, polyethylene glycol and bentonite stirring reaction 1-2h, product filtration washing is into afterwards Property, drying；
（3）Material after above-mentioned drying is immersed in 10% sodium silicate solution, high-temperature calcination after drying, obtains product.
Further, step（1）In pretreatment：It is that the tabacco straw after crushing is placed in 120-150 DEG C of high-temperature steam Pre-process 60-100min.
Further, the step（1）Middle alkaline concentration is 0.5-1mol/L.
Further, the step（3）The temperature of high temperature calcining is 300-400 DEG C.
The beneficial effects of the invention are as follows：
1st, the present invention discloses a kind of tabacco straw sorbing material, to Pb2+Removal efficiency can reach more than 98%, to Cd2+Removal efficiency More than 97% can be reached, the removal efficiency to methylene blue is 92.7-95.8%, and absorption property is excellent.
2nd, tabacco straw sorbing material base-material is tabacco straw fiber and acrylic emulsion, using acrylic emulsion to tobacco Stalk fibre is improved, and due to acrylic resin and macroporous absorption material, tabacco straw fiber and acrylic emulsion are being handed over In the presence of connection agent, initiator and dibutyl tin laurate after cross-linking reaction, the suction of sorbing material on the one hand can be greatly enhanced Attached performance, moreover it is possible to reduce the water absorption and swelling of tabacco straw, increase the service life of sorbing material；And also it is added with sorbing material Bentonite and nano-calcium carbonate, wherein bentonite have microcellular structure in itself, have very strong absorption property, by itself and nano-sized carbon It after sour calcium is added in tabacco straw and acrylic acid, can be dispersed in the network-like structure of sorbing material, on the one hand increase It absorption property, on the other hand can play a part of certain physical crosslinking point, can further improve the absorption property of material；And hand over Product after connection is immersed in sodium silicate solution, i.e., layer of silica gel is formed outside product after cross-linking, on the one hand increases adsorptivity Energy, it on the other hand can also increase the service life of material.
3rd, the present invention pre-processes to tabacco straw fiber first, and the tabacco straw after will crushing is placed in 120-150 Handled in DEG C high-temperature steam, enough remove pectin and pigment in tabacco straw fiber etc., expose the pore structure in cigarette pole fiber Out, absorption property is increased；And remove the cigarette pole fiber after pectin and pigment and activated in alkali lye, can be largely The original compact texture of biological material is destroyed, exposes more active groups, strengthens absorption property.Final product needs In 300-400 DEG C of temperature lower calcination, polyethylene glycol and nano-calcium carbonate can decompose, and further forming micropore in material internal leads to Road, increase absorption property.
Embodiment
With reference to specific embodiment, the invention will be further described, and the polyethylene glycol in following examples is poly- Ethylene glycol 400.
Embodiment 1
A kind of tabacco straw sorbing material, is prepared from the following raw materials in parts by weight：60 parts of tabacco straw, acrylic emulsion 30 Part, 10 parts of nano-calcium carbonate, 12 parts of polyethylene glycol, 8 parts of bentonite, 10% 45 parts of sodium silicate solution, 5 parts of crosslinking agent, initiator 0.2 part and 0.2 part of dibutyl tin laurate.
Wherein crosslinking agent is N, N- methylene-bisacrylamides.
Wherein initiator is sodium peroxydisulfate.
The preparation method of tabacco straw sorbing material, comprises the following steps：
（1）It is 100 mesh that tabacco straw is crushed into particle diameter, and 2 times of weight are added after being placed in 120 DEG C of high-temperature steam pretreatment 100min 1mol/L sodium hydroxides aqueous slkali soaks 12h；
（2）Then acrylic emulsion, crosslinking agent, initiator and dibutyl tin laurate are added, it is anti-at 60 DEG C after stirring 0.5h is answered, adds nano-calcium carbonate, polyethylene glycol and bentonite stirring reaction 1h, product filtration washing to neutrality, drying afterwards；
（3）Material after above-mentioned drying is immersed in 12h in 10% sodium silicate solution, 400 DEG C of high-temperature calcinations after drying, must be produced Product.
Embodiment 2
A kind of tabacco straw sorbing material, is prepared from the following raw materials in parts by weight：65 parts of tabacco straw, acrylic emulsion 35 Part, 11 parts of nano-calcium carbonate, 11 parts of polyethylene glycol, 9 parts of bentonite, 10% 42 parts of sodium silicate solution, 6 parts of crosslinking agent, initiator 0.3 part and 0.3 part of dibutyl tin laurate.
Wherein crosslinking agent is divinylbenzene.
Wherein initiator is benzoyl peroxide.
The preparation method of tabacco straw sorbing material, comprises the following steps：
（1）It is 120 mesh that tabacco straw is crushed into particle diameter, and 2.2 times of weights are added after being placed in 125 DEG C of high-temperature steam pretreatment 90min Measure 0.8mol/L aqueous slkali soakings 16h；
（2）Then acrylic emulsion, crosslinking agent, initiator and dibutyl tin laurate are added, it is anti-at 70 DEG C after stirring 0.8h is answered, nano-calcium carbonate, polyethylene glycol and bentonite stirring reaction 1.2h is added afterwards, product filtration washing to neutrality, dries It is dry；
（3）Material after above-mentioned drying is immersed in 12h in 10% sodium silicate solution, 350 DEG C of high-temperature calcinations after drying, must be produced Product.
Embodiment 3
A kind of tabacco straw sorbing material, is prepared from the following raw materials in parts by weight：70 parts of tabacco straw, acrylic emulsion 40 Part, 12 parts of nano-calcium carbonate, 10 parts of polyethylene glycol, 10 parts of bentonite, 10% 40 parts of sodium silicate solution, 7 parts of crosslinking agent, initiation 0.4 part of 0.4 part of agent and dibutyl tin laurate.
Wherein crosslinking agent is N, N- methylene-bisacrylamides.
Wherein initiator is sodium peroxydisulfate.
The preparation method of tabacco straw sorbing material, comprises the following steps：
（1）It is 150 mesh that tabacco straw is crushed into particle diameter, and 2.5 times of weights are added after being placed in 130 DEG C of high-temperature steam pretreatment 80min Measure 0.6mol/L aqueous slkali soakings 18h；
（2）Then acrylic emulsion, crosslinking agent, initiator and dibutyl tin laurate are added, it is anti-at 80 DEG C after stirring 1h is answered, adds nano-calcium carbonate, polyethylene glycol and bentonite stirring reaction 1.5h, product filtration washing to neutrality, drying afterwards；
（3）Material after above-mentioned drying is immersed in 12h in the sodium silicate solution that mass fraction is 10%, 380 DEG C of high temperature after drying Calcining, obtains product.
Embodiment 4
A kind of tabacco straw sorbing material, is prepared from the following raw materials in parts by weight：75 parts of tabacco straw, acrylic emulsion 45 Part, 13 parts of nano-calcium carbonate, 9 parts of polyethylene glycol, 11 parts of bentonite, 10% 40 parts of sodium silicate solution, 8 parts of crosslinking agent, initiator 0.4 part and 0.4 part of dibutyl tin laurate.
Wherein crosslinking agent is N, N- methylene-bisacrylamides.
Wherein initiator is benzoyl peroxide.
The preparation method of tabacco straw sorbing material, comprises the following steps：
（1）It is 170 mesh that tabacco straw is crushed into particle diameter, and 2.5 times of weights are added after being placed in 135 DEG C of high-temperature steam pretreatment 70min Measure 0.6mol/L aqueous slkali soakings 20h；
（2）Then acrylic emulsion, crosslinking agent, initiator and dibutyl tin laurate are added, it is anti-at 90 DEG C after stirring 0.8h is answered, adds nano-calcium carbonate, polyethylene glycol and bentonite stirring reaction 2h, product filtration washing to neutrality, drying afterwards；
（3）Material after above-mentioned drying is immersed in 12h in 10% sodium silicate solution, 380 DEG C of high-temperature calcinations after drying, must be produced Product.
Embodiment 5
A kind of tabacco straw sorbing material, is prepared from the following raw materials in parts by weight：80 parts of tabacco straw, acrylic emulsion 50 Part, 14 parts of nano-calcium carbonate, 8 parts of polyethylene glycol, 12 parts of bentonite, 10% 38 parts of sodium silicate solution, 9 parts of crosslinking agent, initiator 0.5 part and 0.5 part of dibutyl tin laurate.
Wherein crosslinking agent is divinylbenzene.
Wherein initiator is benzoyl peroxide.
The preparation method of tabacco straw sorbing material, comprises the following steps：
（1）It is 200 mesh that tabacco straw is crushed into particle diameter, and 2.8 times of weights are added after being placed in 140 DEG C of high-temperature steam pretreatment 60min Measure 0.5mol/L aqueous slkali soakings 22h；
（2）Then acrylic emulsion, crosslinking agent, initiator and dibutyl tin laurate are added, it is anti-at 100 DEG C after stirring 0.5h is answered, adds nano-calcium carbonate, polyethylene glycol and bentonite stirring reaction 1h, product filtration washing to neutrality, drying afterwards；
（3）Material after above-mentioned drying is immersed in 12h in 10% sodium silicate solution, 300 DEG C of high-temperature calcinations after drying, must be produced Product.
Embodiment 6
A kind of tabacco straw sorbing material, is prepared from the following raw materials in parts by weight：60 parts of tabacco straw, acrylic emulsion 50 Part, 15 parts of nano-calcium carbonate, 12 parts of polyethylene glycol, 8 parts of bentonite, 10% 35 parts of sodium silicate solution, 10 parts of crosslinking agent, initiation 0.5 part of 0.2 part of agent and dibutyl tin laurate.
Wherein crosslinking agent is divinylbenzene.
Wherein initiator is sodium peroxydisulfate.
The preparation method of tabacco straw sorbing material, comprises the following steps：
（1）It is 100 mesh that tabacco straw is crushed into particle diameter, and 3 times of weight are added after being placed in 145 DEG C of high-temperature steam pretreatment 100min 1mol/L aqueous slkali soakings 24h；
（2）Then acrylic emulsion, crosslinking agent, initiator and dibutyl tin laurate are added, it is anti-at 60 DEG C after stirring 0.8h is answered, nano-calcium carbonate, polyethylene glycol and bentonite stirring reaction 1.5h is added afterwards, product filtration washing to neutrality, dries It is dry；
（3）Material after above-mentioned drying is immersed in 12h in 10% sodium silicate solution, 320 DEG C of high-temperature calcinations after drying, must be produced Product.
Embodiment 7
A kind of tabacco straw sorbing material, is prepared from the following raw materials in parts by weight：65 parts of tabacco straw, acrylic emulsion 45 Part, 10 parts of nano-calcium carbonate, 11 parts of polyethylene glycol, 9 parts of bentonite, 10% 30 parts of sodium silicate solution, 8 parts of crosslinking agent, initiator 0.3 part and 0.4 part of dibutyl tin laurate.
Wherein crosslinking agent is N, N- methylene-bisacrylamides.
Wherein initiator is sodium peroxydisulfate.
The preparation method of tabacco straw sorbing material, comprises the following steps：
（1）It is 100 mesh that tabacco straw is crushed into particle diameter, and 2.8 times of weights are added after being placed in 150 DEG C of high-temperature steam pretreatment 90min Measure 0.8mol/L aqueous slkali soakings 22h；
（2）Then acrylic emulsion, crosslinking agent, initiator and dibutyl tin laurate are added, it is anti-at 70 DEG C after stirring 1h is answered, adds nano-calcium carbonate, polyethylene glycol and bentonite stirring reaction 2h, product filtration washing to neutrality, drying afterwards；
（3）Material after above-mentioned drying is immersed in 12h in 10% sodium silicate solution, 340 DEG C of high-temperature calcinations after drying, must be produced Product.
Embodiment 8
A kind of tabacco straw sorbing material, is prepared from the following raw materials in parts by weight：70 parts of tabacco straw, acrylic emulsion 40 Part, 11 parts of nano-calcium carbonate, 10 parts of polyethylene glycol, 10 parts of bentonite, 10% 40 parts of sodium silicate solution, 9 parts of crosslinking agent, initiation 0.3 part of 0.4 part of agent and dibutyl tin laurate.
Wherein crosslinking agent is divinylbenzene.
Wherein initiator is benzoyl peroxide.
The preparation method of tabacco straw sorbing material, comprises the following steps：
（1）It is 200 mesh that tabacco straw is crushed into particle diameter, and 3 times of weight are added after being placed in 140 DEG C of high-temperature steam pretreatment 80min 0.5mol/L aqueous slkali soakings 24h；
（2）Then acrylic emulsion, crosslinking agent, initiator and dibutyl tin laurate are added, it is anti-at 80 DEG C after stirring 1h is answered, adds nano-calcium carbonate, polyethylene glycol and bentonite stirring reaction 1.5h, product filtration washing to neutrality, drying afterwards；
（3）Material after above-mentioned drying is immersed in 12h in 10% sodium silicate solution, 360 DEG C of high-temperature calcinations after drying, must be produced Product.
Comparative example 1
Comparative example 1 is substantially the same manner as Example 8, and difference is：Nano-calcium carbonate and poly- second two are not added with comparative example 1 Alcohol, other techniques are same as Example 8.
Comparative example 2
Comparative example 2 is substantially the same manner as Example 8, and difference is：Bentonite is not added with comparative example 2, other techniques and reality It is identical to apply example 8.
Performance detection
The tabacco straw sorbing material of 1-8 of the embodiment of the present invention and comparative example 1-2 preparations is detected to Pb2+、Cd2+And methylene The blue removal efficiency of base（%）, the 20mg embodiments 1-8 and comparative example 1-2 sorbing materials prepared are respectively put into 25mL concentration is 50mg/L plumbi nitras, 50mg/L nitric acid cadmium solution and concentration are in 200mg/L methylene blue solution, are detected after 20min molten The concentration of liquid, calculate removal efficiency（%）, concrete outcome is shown in Table 1.
Material absorption property prepared by the embodiment 1-8 of table 1 and comparative example 1-2
As shown in Table 1, the composite fibre sorbing material specific surface area that prepared by 1-8 of the embodiment of the present invention is big, to Pb2+Removal efficiency can To reach more than 98%, to Cd2+Removal efficiency can reach more than 97%, and the removal efficiency to methylene blue is 92.7-95.8%, absorption Excellent performance.
Comparative example 1 is that the formula of sorbing material is adjusted on the basis of embodiment 8, and nano-calcium carbonate is not added with comparative example 1 Calcium and polyethylene glycol, are not added with bentonite in comparative example 2, but it is to Pb2+、Cd2+And the removal efficiency of methylene blue is than reality It is low to apply example 8, it can be seen that nano-calcium carbonate and polyethylene glycol can increase the microcellular structure of material internal, and bentonite can enter One step increases the absorption property of material.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, this area is common Other modifications or equivalent substitution that technical staff is made to technical scheme, without departing from technical solution of the present invention Spirit and scope, all should cover among scope of the presently claimed invention.

Claims (7)

  1. A kind of 1. tabacco straw sorbing material, it is characterised in that：It is prepared from the following raw materials in parts by weight：Tabacco straw 60-80 Part, acrylic emulsion 30-50 parts, nano-calcium carbonate 10-15 parts, polyethylene glycol 8-12 parts, bentonite 8-12 parts, 10% silicic acid Sodium solution 30-45 parts, crosslinking agent 5-10 parts, initiator 0.2-0.5 parts and dibutyl tin laurate 0.2-0.5 parts.
  2. A kind of 2. tabacco straw sorbing material according to claim 1, it is characterised in that：The crosslinking agent is N, N- methylenes Base bisacrylamide or divinylbenzene.
  3. A kind of 3. tabacco straw sorbing material according to claim 1, it is characterised in that：The initiator is sodium peroxydisulfate Or benzoyl peroxide.
  4. A kind of 4. preparation method of tabacco straw sorbing material as claimed in claim 1, it is characterised in that：Including following step Suddenly：
    （1）It is 100-200 mesh that tabacco straw is crushed into particle diameter, and 2-3 times of weight aqueous slkali soaking 12-24h is added after pretreatment；
    （2）Then acrylic emulsion, crosslinking agent, initiator and dibutyl tin laurate are added, in 60-100 after stirring DEG C reaction 0.5-1h, adds nano-calcium carbonate, polyethylene glycol and bentonite stirring reaction 1-2h, product filtration washing is into afterwards Property, drying；
    （3）Material after above-mentioned drying is immersed in 10% sodium silicate solution, high-temperature calcination after drying, obtains product.
  5. A kind of 5. preparation method of tabacco straw sorbing material according to claim 1, it is characterised in that：The step （1）In pretreatment：It is that the tabacco straw after crushing is placed in 120-150 DEG C of high-temperature steam pretreatment 60-100min.
  6. A kind of 6. preparation method of tabacco straw sorbing material according to claim 1, it is characterised in that：The step （1）Middle alkaline concentration is 0.5-1mol/L.
  7. A kind of 7. preparation method of tabacco straw sorbing material according to claim 1, it is characterised in that：The step （3）The temperature of high temperature calcining is 300-400 DEG C.
CN201711227682.XA 2017-11-29 2017-11-29 A kind of tabacco straw sorbing material and preparation method thereof Pending CN107890858A (en)

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Application publication date: 20180410