CN106512950A - Preparation method of surfactant-modified zeolite adsorbent - Google Patents

Preparation method of surfactant-modified zeolite adsorbent Download PDF

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Publication number
CN106512950A
CN106512950A CN201611024829.0A CN201611024829A CN106512950A CN 106512950 A CN106512950 A CN 106512950A CN 201611024829 A CN201611024829 A CN 201611024829A CN 106512950 A CN106512950 A CN 106512950A
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Prior art keywords
zeolite
zeolite powder
preparation
powder
surfactant
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CN201611024829.0A
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Chinese (zh)
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石太宏
宋文哲
薛印
杨慧珠
毛杉
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Sun Yat Sen University
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Sun Yat Sen University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16Alumino-silicates
    • B01J20/165Natural alumino-silicates, e.g. zeolites
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/285Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • C02F2101/22Chromium or chromium compounds, e.g. chromates

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

Abstract

The invention discloses a preparation method of a surfactant-modified zeolite adsorbent. The method comprises specific steps as follows: step 1, natural zeolite is ground into powder, the powder is screened with a sieve of 80-200 meshes, and zeolite powder is obtained; step 2, the zeolite powder is added to a strong base solution and is stirred for 1-2 h, a mixture is washed to be neutral, then neutral zeolite powder is placed into a hydrochloric acid solution and is stirred for 1-3 h, then filtration, dehydration and washing are performed until no chloride ions are detected, and a product is dried; step 3, a surfactant is added to pure water, then the zeolite powder is added to the pure water, and a finished product can be obtained through stirring, washing and drying under constant-temperature and reflux condensation conditions by a magnetic stirrer. Raw materials adopted in the method are natural mineral raw materials, the price is low, modification steps are few, the preparation technology is simple, modified zeolite has the very high ability for capturing heavy metal chromium ions, the adsorbing capacity is large, the removal rate is high, the speed is high, the adsorbing efficiency is improved, and the use effect is good.

Description

A kind of preparation method of surface active agent modification zeolites adsorbent
Technical field
The present invention relates to water pollution process field, specifically a kind of preparation side of surface active agent modification zeolites adsorbent Method.
Background technology
As Chinese Urbanization and industrialization development are accelerated, water pollution also becomes increasingly serious.Some factory and enterprises are transported Waste water produced by row often contains substantial amounts of toxic pollutant, and wherein chromium ion is then a kind of very big pollution of hazardness Thing.Chromate waste water not up to standard can cause many pathological changes reactions of plant, biological and human body in being discharged into water body, and concentration is high Shi Ze has fatal harm.Therefore, to the removal of chromium ion in water body into environmentalist study hotspot, and wherein by It is higher compared with trivalent chromium toxicity in Cr VI, therefore even more paid close attention to by popular and scientific research personnel.For chromic removal, when In front practical application to adopt chemical precipitation method and membrane separation process etc., these methods need expensive cost and running cost more.Just Therefore, adsorption treatment is carried out to which using cheap natural adsorbent then becomes a potential research direction.And often day When right adsorbent is unprocessed, its absorbability is general, and using value is little, therefore research focuses mostly in using suitable side Method natural adsorbent is modified after adsorbing hexavalent chromium again.Existing many researchs both at home and abroad show that natural zeolite is through appropriate It is organically-modified, its absorption property to organic pollution is very good, it might even be possible to match in excellence or beauty with activated carbon.And China is natural Zeolite mineral resources very abundant, gross reserves are at the forefront in the world.Using chromium ion in modified natural zeolite treatment water, and other Anionic pollutant, will become a kind of potential method of tool.
The content of the invention
It is an object of the invention to provide a kind of preparation method of surface active agent modification zeolites adsorbent, above-mentioned to solve The problem proposed in background technology.
For achieving the above object, the present invention provides following technical scheme:
A kind of preparation method of surface active agent modification zeolites adsorbent, comprises the following steps that:
Step one, natural zeolite is pulverized, and 80-200 mesh sieves excessively obtain zeolite powder;
Step 2, by zeolite powder add 0.5-1 times 2mol/L strong base solution in, stirring 1-2h, then spend from Sub- water is cleaned to neutrality, then neutral zeolite powder is put in the hydrochloric acid solution of 0.5-1 times of 2mol/L, stirs 1-3h, afterwards Filtering means dehydration is cleaned to detecting without chloride ion, and is dried at 35-40 DEG C;
Step 3, adds surfactant in pure water, the zeolite powder that then addition step 2 is obtained in pure water, uses Magnetic stirring apparatuss stir 3-5h under the conditions of 60 DEG C of constant temperature and condensing reflux, filter afterwards and clean for several times, dry at 25-40 DEG C It is dry, you can to obtain finished product.
As further scheme of the invention:Surfactant adopts cetylpyridinium chloride or cetyl trimethyl Amine bromide, highly basic adopt sodium hydroxide or potassium hydroxide.
As further scheme of the invention:The whipping temp of hydrochloric acid solution and strong base solution is 30-50 DEG C, and surface is lived Property agent and zeolite powder weight ratio be 0.2-0.5:1.
Compared with prior art, the invention has the beneficial effects as follows:The raw material that the present invention is adopted is all from natural mineral raw, Low price, modification procedure are few, preparation process is simple, and modified zeolite is extremely strong for the capturing ability of heavy metal chromium ion, Adsorption capacity is big, removal efficiency is high, speed is fast, improves adsorption efficiency, and using effect is good.
Description of the drawings
Fig. 1 is the infrared light before and after the modified zeolite absorption of the preparation method preparation of surface active agent modification zeolites adsorbent Spectrogram.
Fig. 2 is the SEM figures before the modified zeolite absorption of the preparation method preparation of surface active agent modification zeolites adsorbent.
Fig. 3 is the SEM figures after the modified zeolite absorption of the preparation method preparation of surface active agent modification zeolites adsorbent.
Fig. 4 is the XRD figure before and after the modified zeolite absorption of the preparation method preparation of surface active agent modification zeolites adsorbent.
Specific embodiment
The technical scheme of this patent is described in more detail with reference to specific embodiment.
Embodiment 1
A kind of preparation method of surface active agent modification zeolites adsorbent, comprises the following steps that:
Step one, natural zeolite is pulverized, and 120 mesh sieves excessively obtain zeolite powder;
Step 2, during zeolite powder to be added 0.6 times of the sodium hydroxide solution of 2mol/L, stirs 1h, so at 35 DEG C Deionized water is cleaned to neutrality afterwards, then neutral zeolite powder is put in the hydrochloric acid solution of 1 times of 2mol/L, is stirred at 40 DEG C 2h, afterwards filtering means dehydration clean to detecting without chloride ion, and dry at 35 DEG C;
Step 3, adds cetylpyridinium chloride in pure water, the zeolite that then addition step 2 is obtained in pure water The weight ratio of powder, surfactant and zeolite powder is 0.2:1, with magnetic stirring apparatuss in 60 DEG C of constant temperature and condensing reflux bar 3h is stirred under part, is filtered afterwards and is cleaned for several times, dry at 28 DEG C, you can obtain finished product.
Embodiment 2
Step one, natural zeolite is pulverized, and 160 mesh sieves excessively obtain zeolite powder;
Step 2, during zeolite powder to be added 0.8 times of the sodium hydroxide solution of 2mol/L, stirs 2h, so at 38 DEG C Deionized water is cleaned to neutrality afterwards, then neutral zeolite powder is put in the hydrochloric acid solution of 0.5 times of 2mol/L, is stirred at 40 DEG C 2h is mixed, filtering means dehydration is cleaned to detecting without chloride ion afterwards, and dried at 35 DEG C;
Step 3, adds CTAB in pure water, then adds what step 2 was obtained in pure water The weight ratio of zeolite powder, surfactant and zeolite powder is 0.5:1, with magnetic stirring apparatuss are in 60 DEG C of constant temperature and condense back 3h is stirred under the conditions of stream, is filtered afterwards and is cleaned for several times, dry at 30 DEG C, you can obtain finished product.
Comparative example
Surfactant is replaced with trimethylamine by comparative example 1, and surfactant is replaced with benzyl trimethyl bromine by comparative example 2 Change ammonium, surfactant is replaced with hexamethylene diamine by comparative example 3, and remaining step and component are with embodiment 1.
Comparative example 4 is processed only with strong base solution in step 2, and comparative example 5 is molten only with hydrochloric acid in step 2 Liquid is processed, and comparative example 6 is first processed using hydrochloric acid solution in step 2 and wash clean is to neutrality, then using strong base solution Processed, remaining step and component are with embodiment 2.
By the product of embodiment 1-2 of 0.5g, comparative example 1-6 and natural zeolite respectively with 25mL, the sexavalence of 50mg/L Cr solution mixes, and adjusts stirring reaction 1h to 6 room temperatures of pH, filters, and determines Cr (VI) adsorbance of modified zeolite, is tied Fruit sees Tables 1 and 2.
Table 1
Table 1 can be seen that using first strong base solution process and wash clean is to neutrality, then is processed using hydrochloric acid solution Method prepare modified zeolite for the sewage containing heavy metal chromium ion process, for the heavy metal chromium in absorption effluent Ion effect is good.
Table 2
Table 2 it can be seen that using cetylpyridinium chloride and CTAB as surfactant, It is good for the heavy metal chromium ion effect in absorption effluent.
The modified zeolite prepared in embodiment 1 and embodiment 2, with more amino, can form huge legendary turtle with heavy metal ion Compound, strong for the capturing ability of heavy metal, adsorption capacity is big, removal efficiency is high, speed is fast, add it is zeolite structured in duct it is rich Richness, specific surface area are big, therefore for heavy metal ion has preferable adsorption, are applied at the sexavalence Cr ion of sewage Reason, simple to operate, with low cost, heavy-metal residual rate is low., compared with the zeolite of unmodified process, absorbability is more for the adsorbent By force, adsorption capacity is bigger.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of spirit or essential attributes without departing substantially from the present invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention.Any reference in claim should not be considered as and limit involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of description is only that those skilled in the art should for clarity Using description as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form those skilled in the art Understandable other embodiment.

Claims (3)

1. a kind of preparation method of surface active agent modification zeolites adsorbent, it is characterised in that comprise the following steps that:
Step one, natural zeolite is pulverized, and 80-200 mesh sieves excessively obtain zeolite powder;
Step 2, during zeolite powder to be added 0.5-1 times of the strong base solution of 2mol/L, stirs 1-2h, then deionized water Clean to neutrality, then in the hydrochloric acid solution of the 2mol/L that neutral zeolite powder is put into 0.5-1 times, stir 1-3h, filter afterwards Dehydration is cleaned to detecting without chloride ion, and is dried at 35-40 DEG C;
Step 3, adds surfactant in pure water, the zeolite powder that then addition step 2 is obtained in pure water, uses magnetic force Agitator stirs 3-5h under the conditions of 60 DEG C of constant temperature and condensing reflux, filters afterwards and cleans for several times, dries, i.e., at 25-40 DEG C Finished product is obtained.
2. the preparation method of surface active agent modification zeolites adsorbent according to claim 1, it is characterised in that the table Face activating agent adopts cetylpyridinium chloride or CTAB, highly basic to adopt sodium hydroxide or hydroxide Potassium.
3. the preparation method of surface active agent modification zeolites adsorbent according to claim 1 and 2, it is characterised in that institute The whipping temp for stating hydrochloric acid solution and strong base solution is 30-50 DEG C, and the weight ratio of surfactant and zeolite powder is 0.2-0.5:1。
CN201611024829.0A 2016-11-14 2016-11-14 Preparation method of surfactant-modified zeolite adsorbent Pending CN106512950A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107265544A (en) * 2017-06-12 2017-10-20 防城港市渔业技术推广站 A kind of fishery cultivating treatment tank
CN107265756A (en) * 2017-06-12 2017-10-20 防城港市渔业技术推广站 A kind of fishery cultivating sewage water treatment method
CN108464302A (en) * 2018-04-28 2018-08-31 张志� A kind of slow-release chlorine dioxide of solid carrier Zeolite support and preparation method thereof
CN109012589A (en) * 2018-08-23 2018-12-18 中山大学 A kind of urea-modified charcoal of selective absorption Cr (VI) and its preparation method and application method
CN109046297A (en) * 2018-07-26 2018-12-21 江苏开放大学(江苏城市职业学院) A kind of preparation method and applications of modified coal ash sodium base zeolite
CN109200995A (en) * 2018-09-03 2019-01-15 中成未来新材料(福建)有限公司 A kind of preparation process of environmental-protection adsorption material
CN109351337A (en) * 2018-12-18 2019-02-19 东北大学 A kind of preparation method and applications of silane coupler modified zeolite
CN109368872A (en) * 2018-12-03 2019-02-22 赛恩斯环保股份有限公司 A kind of method of Tungsten smelting Sewage advanced treatment
CN109970133A (en) * 2019-01-24 2019-07-05 玉溪师范学院 The porous ecological assemblage device and its technique of sewage plant level-one A Tailwater Depth processing
CN110193355A (en) * 2019-06-27 2019-09-03 清华大学 The method that the porous material of pollution of chromium in water removal is removed in the modified Chinese parasol leaf production of CTAB
CN112028164A (en) * 2020-08-25 2020-12-04 广西桂林新大桂工环境科技中心(有限合伙) Preparation method of zeolite liquid for sewage treatment
CN112237901A (en) * 2020-10-16 2021-01-19 青岛蓝色地球大数据科技有限公司 Preparation method of novel composite modified montmorillonite for treating chromium-containing wastewater
CN112266098A (en) * 2020-10-12 2021-01-26 东华理工大学 Method for improving adsorption performance of sorbent by using auxiliary agent
CN115584167A (en) * 2022-10-20 2023-01-10 李其洁 Antibacterial interior wall coating and preparation method thereof
CN117256487A (en) * 2023-09-11 2023-12-22 山东辛化硅胶有限公司 Easily-treated water-soluble cat litter and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101549873A (en) * 2009-05-11 2009-10-07 曾玉彬 Surface active agent modification zeolites, method of preparing thereof and usage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101549873A (en) * 2009-05-11 2009-10-07 曾玉彬 Surface active agent modification zeolites, method of preparing thereof and usage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WENZHE SONG等: "Pretreatment effects on the sorption of Cr(VI) onto surfactant modified zeolite: Mechanism analysis", 《JOURNAL OF ENVIRONMENTAL MANAGEMENT》 *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107265756A (en) * 2017-06-12 2017-10-20 防城港市渔业技术推广站 A kind of fishery cultivating sewage water treatment method
CN107265544A (en) * 2017-06-12 2017-10-20 防城港市渔业技术推广站 A kind of fishery cultivating treatment tank
CN108464302A (en) * 2018-04-28 2018-08-31 张志� A kind of slow-release chlorine dioxide of solid carrier Zeolite support and preparation method thereof
CN109046297A (en) * 2018-07-26 2018-12-21 江苏开放大学(江苏城市职业学院) A kind of preparation method and applications of modified coal ash sodium base zeolite
CN109012589B (en) * 2018-08-23 2019-07-02 中山大学 A kind of urea-modified charcoal of selective absorption Cr (VI) and its preparation method and application method
CN109012589A (en) * 2018-08-23 2018-12-18 中山大学 A kind of urea-modified charcoal of selective absorption Cr (VI) and its preparation method and application method
CN109200995A (en) * 2018-09-03 2019-01-15 中成未来新材料(福建)有限公司 A kind of preparation process of environmental-protection adsorption material
CN109368872A (en) * 2018-12-03 2019-02-22 赛恩斯环保股份有限公司 A kind of method of Tungsten smelting Sewage advanced treatment
CN109351337A (en) * 2018-12-18 2019-02-19 东北大学 A kind of preparation method and applications of silane coupler modified zeolite
CN109970133A (en) * 2019-01-24 2019-07-05 玉溪师范学院 The porous ecological assemblage device and its technique of sewage plant level-one A Tailwater Depth processing
CN110193355A (en) * 2019-06-27 2019-09-03 清华大学 The method that the porous material of pollution of chromium in water removal is removed in the modified Chinese parasol leaf production of CTAB
CN112028164A (en) * 2020-08-25 2020-12-04 广西桂林新大桂工环境科技中心(有限合伙) Preparation method of zeolite liquid for sewage treatment
CN112266098A (en) * 2020-10-12 2021-01-26 东华理工大学 Method for improving adsorption performance of sorbent by using auxiliary agent
CN112266098B (en) * 2020-10-12 2023-03-24 东华理工大学 Method for improving adsorption performance of sorbent by using auxiliary agent
CN112237901A (en) * 2020-10-16 2021-01-19 青岛蓝色地球大数据科技有限公司 Preparation method of novel composite modified montmorillonite for treating chromium-containing wastewater
CN115584167A (en) * 2022-10-20 2023-01-10 李其洁 Antibacterial interior wall coating and preparation method thereof
CN117256487A (en) * 2023-09-11 2023-12-22 山东辛化硅胶有限公司 Easily-treated water-soluble cat litter and preparation method thereof
CN117256487B (en) * 2023-09-11 2024-03-26 山东辛化硅胶有限公司 Easily-treated water-soluble cat litter and preparation method thereof

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