CN115212848A - Modified straw adsorbent for removing surfactant in water and preparation method thereof - Google Patents
Modified straw adsorbent for removing surfactant in water and preparation method thereof Download PDFInfo
- Publication number
- CN115212848A CN115212848A CN202210340640.1A CN202210340640A CN115212848A CN 115212848 A CN115212848 A CN 115212848A CN 202210340640 A CN202210340640 A CN 202210340640A CN 115212848 A CN115212848 A CN 115212848A
- Authority
- CN
- China
- Prior art keywords
- straw
- adsorbent
- surfactant
- polyethyleneimine
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010902 straw Substances 0.000 title claims abstract description 96
- 239000003463 adsorbent Substances 0.000 title claims abstract description 56
- 239000004094 surface-active agent Substances 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 229920002873 Polyethylenimine Polymers 0.000 claims abstract description 42
- 238000001179 sorption measurement Methods 0.000 claims abstract description 41
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000001263 FEMA 3042 Substances 0.000 claims abstract description 18
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 18
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 claims abstract description 18
- 229940033123 tannic acid Drugs 0.000 claims abstract description 18
- 235000015523 tannic acid Nutrition 0.000 claims abstract description 18
- 229920002258 tannic acid Polymers 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000010865 sewage Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 10
- 240000008042 Zea mays Species 0.000 claims description 7
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 7
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 7
- 235000005822 corn Nutrition 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 241000209140 Triticum Species 0.000 claims description 4
- 235000021307 Triticum Nutrition 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims description 2
- 244000082204 Phyllostachys viridis Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 229920001864 tannin Polymers 0.000 claims 1
- 235000018553 tannin Nutrition 0.000 claims 1
- 239000001648 tannin Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 239000000758 substrate Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- HFQQZARZPUDIFP-UHFFFAOYSA-M sodium;2-dodecylbenzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O HFQQZARZPUDIFP-UHFFFAOYSA-M 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 22
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 13
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 13
- 239000007864 aqueous solution Substances 0.000 description 7
- 239000000706 filtrate Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 6
- 239000010797 grey water Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 239000006228 supernatant Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 239000003945 anionic surfactant Substances 0.000 description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 125000001165 hydrophobic group Chemical group 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 239000010866 blackwater Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 125000002924 primary amino group Chemical class [H]N([H])* 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000007059 acute toxicity Effects 0.000 description 1
- 231100000403 acute toxicity Toxicity 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007665 chronic toxicity Effects 0.000 description 1
- 231100000160 chronic toxicity Toxicity 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004851 dishwashing Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 125000000467 secondary amino group Chemical class [H]N([*:1])[*:2] 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- C02F1/286—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
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (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)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to a preparation method of a modified straw adsorbent for removing a surfactant in water, which comprises the following steps: s1, mixing straws with a polyethyleneimine solution, and stirring; s2, adding tannic acid or a tannic acid solution, stirring again, centrifugally separating supernate, and drying to obtain the modified straw adsorbent. The invention takes straws as an adsorbent substrate, the straws are porous, the straws are modified by adopting polyethyleneimine and tannic acid, so that the surfaces of the straws are connected with various active groups to obtain the novel modified straw adsorbent, and when the modified straw adsorbent is used for treating sewage, the active groups on the surfaces of the straws are connected with the groups of a surfactant, so that the surfactant is fixed on the adsorbent, and the removal effect on the surfactant in the water is achieved. Through practical tests, the product prepared by the modified straw adsorbent provided by the invention has the advantages of high adsorption efficiency, environmental protection and the like, and the adsorption rate of the product on SDBS in water reaches over 88%.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a modified straw adsorbent for removing a surfactant in water and a preparation method thereof.
Background
Domestic sewage is mainly derived from kitchen sewage, domestic washing sewage, toilet flushing water and the like, and can be divided into black water and grey water according to the source. Black water comes from toilets, including water, urine, feces, etc.; the grey water is mainly from domestic washing water in kitchens, clothes washing, bathing and the like. As a major component of laundry detergents and dishwashing detergents, surfactants become a significant source of contaminants in grey water.
Surfactants are compounds with an amphiphilic structure comprising a hydrophilic head and a hydrophobic tail. Hydrophilic groups can be classified into cationic, anionic, nonionic and amphoteric types according to their charge. Sodium linear alkyl benzene sulphonate (LAS) is one of the most common anionic surfactants, and is used in nearly 80% of household cleaners. Due to hydrophilic and hydrophobic groups on molecules, anionic surfactants can aggregate under the water surface to form an isolation layer, so that the reoxygenation process is limited, the dissolved oxygen content in water is reduced, and in addition, the solubility of hydrophobic and persistent organic pollutants can be obviously increased by wastewater containing the anionic surfactants, so that acute and chronic toxicity is caused. Direct discharge of grey water can also have an adverse effect on the soil and crops. Some studies have shown that direct use of untreated grey water for irrigation may increase soil salinity, alkalinity, and pH, thereby affecting plant health and soil hydraulic properties.
Therefore, the removal of the surfactant in the sewage is very important for protecting water quality and ecological environment, and the development of an efficient and environment-friendly method for removing the surfactant is a problem to be solved urgently by environment-friendly researchers.
Disclosure of Invention
Technical problem to be solved
In view of the above disadvantages and shortcomings of the prior art, the present invention provides a modified straw adsorbent for removing surfactants in water and a preparation method thereof, wherein straws are used as adsorbent substrates to modify straws to obtain the modified straw adsorbent, which has an excellent adsorption effect on surfactant LAS and a certain adsorption effect on cationic surfactants and neutral surfactants. The invention provides a low-cost high-efficiency adsorbent, which can effectively remove a surfactant in sewage to protect water quality and ecological environment on one hand, reduce water treatment cost on the other hand, change rural straws into valuables at the same time, and effectively relieve the problem that the straws in the rural field pollute the atmosphere by burning.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
in one aspect, the invention provides a preparation method of a modified straw adsorbent for removing a surfactant in water, which comprises the following steps:
s1, mixing straws with a polyethyleneimine solution, and stirring;
s2, adding tannic acid or a tannic acid solution, stirring again, centrifugally separating supernate, and drying to obtain the modified straw adsorbent.
Preferably, the polyethyleneimine is branched polyethyleneimine or hyperbranched polyethyleneimine.
According to the preferred embodiment of the invention, the straw is any one or more of corn straw, wheat straw, cotton straw and bamboo straw; the straw is granular or segment-shaped.
According to the preferred embodiment of the present invention, the concentration of the polyethyleneimine solution is 4-6g/L, and the solvent can be water or methanol, ethanol, acetone, etc.; preferably water; the dosage ratio of the straw to the polyethyleneimine solution is that 50mL of polyethyleneimine solution is added to every 1-1.5g of straw.
According to the preferred embodiment of the invention, the mass ratio of the straw to the polyethyleneimine is 3-5.
According to the preferred embodiment of the invention, the dosage ratio of the polyethyleneimine to the tannic acid is 10-15; in the reaction system, the concentration ratio of PEI to TA is 10-15.
According to the preferred embodiment of the present invention, the concentration of the tannic acid solution is 0.3-0.5g/L, and the amount of the tannic acid solution is 50mL per 1-1.5g of straw.
According to a preferred embodiment of the present invention, in S1, the stirring time is 10 to 15 minutes, and the reaction temperature is 25 to 35 ℃.
According to a preferred embodiment of the present invention, in S2, the stirring time is 3-12h, and the reaction temperature is 25-35 ℃.
In a second aspect, the invention provides a modified straw adsorbent for removing a surfactant in water, which is obtained by adopting the preparation method of any one of the embodiments.
(III) advantageous effects
The invention has the technical effects that:
(1) The invention takes straws as an adsorbent substrate, the straws have porosity and a physical adsorption effect, the straws are modified by adopting polyethyleneimine and tannic acid, so that the surfaces of the straws are connected with various active groups to obtain a novel modified straw adsorbent, and when the modified straw adsorbent is used for treating sewage, the active groups on the surfaces of the straws are connected with the groups of a surfactant, so that the surfactant is fixed on the adsorbent, and the modified straw adsorbent plays a role in removing the surfactant in the water.
(2) Actual tests show that the product prepared by the modified straw adsorbent provided by the invention has the advantages of high adsorption efficiency, environmental friendliness and the like, the adsorption rate of the product on Sodium Dodecyl Benzene Sulfonate (SDBS) or Sodium Dodecyl Sulfate (SDS) is up to more than 88%, and the product also has certain adsorption effects on cations and neutral surfactants.
(3) The modified straw adsorbent prepared by the invention takes straws as an adsorbent substrate, has rich sources, and has easily obtained raw materials and very low cost compared with surface active agents such as commercially available activated carbon and the like; when the adsorbent is used for removing the surfactant in water, the adsorbent has the advantages of low energy consumption, high adsorption efficiency, no secondary pollution and the like, on one hand, the problem that straw burning pollutes the atmosphere in the rural field is relieved, and on the other hand, a more environment-friendly, efficient and cheap efficient adsorbent product is provided for removing the surfactant in sewage.
(4) The preparation method is simple, the conditions are simple, strong-acid or alkaline compounds or organic solvents are not needed, the preparation method has no secondary pollution, the preparation can be carried out at normal temperature, the process energy consumption is low, and the operation is easy.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof.
The invention utilizes the polyethyleneimine and the tannic acid to modify the straws, the polyethyleneimine is a water-soluble high molecular polymer with more functional groups, particularly the branched polyethyleneimine or the ethylenediamine-terminated polyethyleneimine has a dendritic structure, molecular chains are not easy to wind or fold, so that a large number of active polar groups (amino groups) and hydrophobic groups (vinyl groups) are exposed outside in molecules, and the large number of groups can be tightly combined (grabbed) on the straws on one hand and have good binding property with other molecules (particularly surfactant molecules) on the other hand.
Branched polyethyleneimine or ethylenediamine-terminated polyethyleneimine has primary amine and secondary amine with strong reactivity, can easily react with epoxy and aldehyde, and the amino group of the polyethyleneimine can react with hydroxyl to generate hydrogen bond, react with carboxyl to generate ionic bond and react with carbonyl group to generate covalent bond; the polyethyleneimine has both polar groups (amino groups) and hydrophobic groups (vinyl groups), so that the polyethyleneimine can be combined with groups on the surfaces of different substances to provide conditions for efficiently fixing the surfactant. Compared with linear polyethyleneimine, active NH 2-at the end of the branched polyethyleneimine is mostly exposed outside, so that the prepared adsorbent has better adsorption performance, and the polyethyleneimine is bonded to the straw more firmly.
The structural formula of tannic acid is as follows:
the tannic acid has a branch structure which is radially dispersed, and is provided with a large amount of active benzene hydroxyl, carbonyl and the like, the polar groups can be firmly combined with polyethyleneimine connected on the straw, and meanwhile, rich hydroxyl and carbonyl are provided for the straw, and the polar groups are easily connected with groups on a surfactant (such as hydrogen bond connection), so that the defects that the polyethyleneimine is only NH2-, NH-, vinyl and the like are overcome, the spatial structure of the polyethyleneimine on the surface of the straw and the coverage range of the active groups are expanded, and conditions are provided for fixing and adsorbing various different surfactants.
The technical effects of the present invention will be described with reference to examples, in which PEI is a commercially available product comprising linear PEI and branched PEI.
Example 1
Adding 1g of corn straw into 50ml of 5g/L PEI solution, magnetically stirring for 10 minutes at room temperature, adding 50ml of tannic acid TA solution (with the concentration of 0.5 g/L), magnetically stirring for 2 hours at room temperature, centrifuging until the pH of a supernatant is less than 7.2, and drying in an oven at 60 ℃ for 24 hours to prepare the straw adsorbent.
100mL of an aqueous solution of Sodium Dodecylbenzenesulfonate (SDBS) was prepared at an initial concentration of 50mg/L. Adding 0.1g of the straw adsorbent prepared in the embodiment for normal-temperature adsorption and fixation, centrifugally separating the straw adsorbent after adsorption, filtering, and measuring the concentration of the surfactant in the filtrate. Adsorption rate = (initial concentration-post-adsorption concentration)/initial concentration 100%. Adsorbing for 12h at room temperature, and the adsorption rate reaches 94.6%.
Example 2
Adding 1.5g of corn straws into 50ml of 6g/L PEI solution, magnetically stirring for 15 minutes at room temperature, adding 50ml of TA solution (with the concentration of 0.4 g/L), magnetically stirring for 3 hours at room temperature, centrifuging until the pH of a supernatant is less than 7.2, and drying in an oven at 60 ℃ for 24 hours to prepare the straw adsorbent.
100mL of an aqueous solution of Sodium Dodecylbenzenesulfonate (SDBS) was prepared at an initial concentration of 50mg/L. 0.1g of the straw adsorbent prepared in the embodiment is added for adsorption and fixation at normal temperature, the straw adsorbent is centrifugally separated after adsorption, and the concentration of the surfactant in the filtrate is measured after filtration. Adsorbing for 12h at room temperature, wherein the adsorption rate reaches 88.2%.
Example 3
Adding 1.2g of wheat straw into 50ml of 5g/L PEI solution, magnetically stirring for 12 minutes at room temperature, adding 50ml of TA solution (with the concentration of 0.5 g/L), magnetically stirring for 6 hours at room temperature, centrifuging until the pH of a supernatant is less than 7.2, and drying in an oven at 60 ℃ for 24 hours to prepare the straw adsorbent.
100mL of aqueous solution of Sodium Dodecyl Benzene Sulfonate (SDBS) with the initial concentration of 50mg/L is prepared. 0.1g of the straw adsorbent prepared in the embodiment is added for adsorption and fixation at normal temperature, the straw adsorbent is centrifugally separated after adsorption, and the concentration of the surfactant in the filtrate is measured after filtration. Adsorbing for 12h at room temperature, wherein the adsorption rate reaches 91.2%.
Example 4
Adding 1g of wheat straw into 50ml of 5g/L PEI solution, magnetically stirring for 10 minutes at room temperature, adding 50ml of TA solution (with the concentration of 0.5 g/L), magnetically stirring for 2 hours at room temperature, centrifuging until the pH of a supernatant is less than 7.2, and drying in an oven at 60 ℃ for 24 hours to prepare the straw adsorbent.
100mL of an aqueous solution of Sodium Dodecyl Sulfate (SDS) was prepared at an initial concentration of 50mg/L. Adding 0.1g of the straw adsorbent prepared in the embodiment for normal-temperature adsorption and fixation, centrifugally separating the straw adsorbent after adsorption, filtering, and measuring the concentration of the surfactant in the filtrate. Adsorbing for 12h at room temperature, wherein the adsorption rate reaches 89.7%.
Comparative example 1
0.1g of corn straw is directly put into 100mL of Sodium Dodecyl Benzene Sulfonate (SDBS) aqueous solution with the initial concentration of 50mg/L, SDS is adsorbed and fixed at normal temperature, the straw adsorbent is centrifugally separated after adsorption, and the concentration of the surfactant in the filtrate is measured after filtration. Adsorption rate = (initial concentration-post-adsorption concentration)/initial concentration 100%. Adsorbing for 12h at room temperature, wherein the adsorption rate reaches 10.6%.
Comparative example 2
Adding 1g of corn straws into 10ml of 1% NaOH solution, carrying out oil bath heating for 1h at the temperature of 120 ℃, washing with deionized water until the pH value of a cleaning solution is about 7, and drying in a 60-DEG C drying oven to prepare the straw adsorbent.
100mL of an aqueous solution of Sodium Dodecylbenzenesulfonate (SDBS) was prepared at an initial concentration of 50mg/L. 0.1g of the straw adsorbent prepared in the embodiment is added for adsorption and fixation at normal temperature, the straw adsorbent is centrifugally separated after adsorption, and the concentration of the surfactant in the filtrate is measured after filtration. Adsorption rate = (initial concentration-post-adsorption concentration)/initial concentration 100%. Adsorbing for 12h at room temperature, and the modified adsorption rate is 0.2%.
Comparative example 3
Adding 1g of corn straw to 10ml of 1% H 2 SO 4 Heating in the solution in an oil bath at 120 ℃ for 1h, washing with deionized water until the pH of the cleaning solution is about 7, and drying in a 60 ℃ oven to obtain the straw adsorbent.
100mL of an aqueous solution of Sodium Dodecylbenzenesulfonate (SDS) was prepared at an initial concentration of 50mg/L. Adding 0.1g of the straw adsorbent prepared in the embodiment for normal-temperature adsorption and fixation, centrifugally separating the straw adsorbent after adsorption, filtering, and measuring the concentration of the surfactant in the filtrate. Adsorption rate = (initial concentration-post-adsorption concentration)/initial concentration 100%. Adsorbing for 12h at room temperature, and the modified adsorption rate is 2.8%.
Therefore, the invention modifies the straws by using the polyethyleneimine and the tannic acid, and the two multi-active functional group compounds have the effect of synergistically increasing the adsorption effect of the modified straw adsorbent, can obviously increase the chemical fixation effect of the straws on various adsorbents, and expands the range of compounds which can be adsorbed and fixed by the straw adsorbent.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A preparation method of a modified straw adsorbent for removing a surfactant in water is characterized by comprising the following steps:
s1, mixing straws with a polyethyleneimine solution, and stirring;
s2, adding tannic acid or a tannic acid solution, stirring again, centrifugally separating supernate, and drying to obtain the modified straw adsorbent.
2. The preparation method of claim 1, wherein the straw is any one or more of corn straw, wheat straw, cotton straw, bamboo straw.
3. The method according to claim 1, wherein the concentration of the polyethyleneimine solution is 4 to 6g/L, and the solvent is water; the dosage ratio of the straw to the polyethyleneimine solution is that 50mL of polyethyleneimine solution is added to every 1-1.5g of straw.
4. The preparation method according to claim 1 or 3, wherein the mass ratio of the straw to the polyethyleneimine is 3-5.
5. The preparation method according to claim 1, characterized in that the ratio of the polyethyleneimine to the tannin is 10-15.
6. The method according to claim 1 or 5, wherein the concentration of the tannic acid solution is 0.3 to 0.5g/L, and the amount of the tannic acid solution is 50mL per 1 to 1.5g of the straw.
7. The process according to claim 1, wherein the stirring time in S1 is 10 to 15 minutes, and the reaction temperature is 25 to 35 ℃.
8. The method according to claim 1, wherein the stirring time in S2 is 3 to 12 hours, and the reaction temperature is 25 to 35 ℃.
9. A modified straw adsorbent for removing water surfactant, which is prepared by the preparation method of any one of claims 1 to 8.
10. A method for removing a surfactant in sewage is characterized in that the surfactant is removed by adopting an adsorption method; the adsorbent used in the adsorption method is the modified straw adsorbent in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210340640.1A CN115212848B (en) | 2022-04-02 | 2022-04-02 | Modified straw adsorbent for removing surfactant in water and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210340640.1A CN115212848B (en) | 2022-04-02 | 2022-04-02 | Modified straw adsorbent for removing surfactant in water and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115212848A true CN115212848A (en) | 2022-10-21 |
| CN115212848B CN115212848B (en) | 2024-03-26 |
Family
ID=83606791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210340640.1A Active CN115212848B (en) | 2022-04-02 | 2022-04-02 | Modified straw adsorbent for removing surfactant in water and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115212848B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070135329A1 (en) * | 2005-12-13 | 2007-06-14 | General Electric Company | Surfactant compositions and associated method |
| CN101607190A (en) * | 2009-07-28 | 2009-12-23 | 淮阴工学院 | A kind of preparation of attapulgite of selectively absorbing tannin |
| CN106000361A (en) * | 2016-07-14 | 2016-10-12 | 胡大苇 | Preparation method of composite adsorptive material for adsorbing heavy metal cadmium in wastewater |
| CN107362782A (en) * | 2017-08-24 | 2017-11-21 | 南京林业大学 | A kind of stalk preparation of Polyethylenimine adsorbent and its preparation method and application |
| CN110280227A (en) * | 2019-07-04 | 2019-09-27 | 青岛科技大学 | MnO2The preparation and its application of the difunctional composite material of/PEI/TA |
| CN111377558A (en) * | 2020-03-17 | 2020-07-07 | 航天凯天环保科技股份有限公司 | Synchronous treatment of Fenton iron mud and FePO obtaining4Resource utilization method |
-
2022
- 2022-04-02 CN CN202210340640.1A patent/CN115212848B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070135329A1 (en) * | 2005-12-13 | 2007-06-14 | General Electric Company | Surfactant compositions and associated method |
| CN101607190A (en) * | 2009-07-28 | 2009-12-23 | 淮阴工学院 | A kind of preparation of attapulgite of selectively absorbing tannin |
| CN106000361A (en) * | 2016-07-14 | 2016-10-12 | 胡大苇 | Preparation method of composite adsorptive material for adsorbing heavy metal cadmium in wastewater |
| CN107362782A (en) * | 2017-08-24 | 2017-11-21 | 南京林业大学 | A kind of stalk preparation of Polyethylenimine adsorbent and its preparation method and application |
| CN110280227A (en) * | 2019-07-04 | 2019-09-27 | 青岛科技大学 | MnO2The preparation and its application of the difunctional composite material of/PEI/TA |
| CN111377558A (en) * | 2020-03-17 | 2020-07-07 | 航天凯天环保科技股份有限公司 | Synchronous treatment of Fenton iron mud and FePO obtaining4Resource utilization method |
Non-Patent Citations (1)
| Title |
|---|
| N S ERSA ET AL.: "Adsorption mechanism on surfactant removal using eggshell waste and rice straw as economically biosorbent", 《IOP CONF. SER.: EARTH ENVIRON. SCI.》, vol. 871, pages 1 - 11 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115212848B (en) | 2024-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Laszlo | Removing acid dyes from textile wastewater using biomass for decolorization | |
| CN104014315B (en) | A kind of chitin modified zeolite of sulfydryl phenylthiosemicarbazide and preparation and application thereof | |
| CN102626608A (en) | Straw modified into amphiprotic adsorbent and preparation method thereof | |
| CN110330213B (en) | Efficient composite conditioner for sludge dewatering | |
| CN102107980A (en) | Method for removing sulfonic-group-containing dye in alkaline waste water by using magnetic chitosan adsorbent | |
| Filipkowska et al. | Adsorption of reactive dyes by modified chitin from aqueous solutions | |
| CN104944603A (en) | Sewage treatment agent | |
| CN111229179A (en) | Lignin-based anionic dye adsorbent and preparation method and application thereof | |
| CN111470753A (en) | Sludge treatment agent for improving sludge dehydration rate and preparation method thereof | |
| CN113842883B (en) | Lanthanum-loaded iron carbon nanotube film material for environmental remediation and preparation method and application thereof | |
| CN109939663A (en) | A kind of preparation method and application from floating adsorbent | |
| CN106390770A (en) | Preparation method of dopamine composite ultrafiltration membrane | |
| CN113058546A (en) | Lanthanum-modified kaolin phosphorus removal agent and preparation method and application thereof | |
| CN111233174B (en) | Scale inhibition powder, preparation method and application thereof | |
| CN111203197A (en) | Adsorbing material based on epoxy and amino crosslinking and preparation method thereof | |
| CN115212848B (en) | Modified straw adsorbent for removing surfactant in water and preparation method thereof | |
| CN102553451B (en) | Cleaning agent and application thereof | |
| CN103623618A (en) | Hydrophobic filter material taking quartz sands as carrier and preparation method thereof | |
| CN109647356B (en) | Preparation method of amphoteric adsorption material and application of amphoteric adsorption material in simultaneous removal of anionic and cationic dyes in wastewater | |
| CN109718726B (en) | Production process of amphiphilic silica-chitosan composite aerogel | |
| KR102132425B1 (en) | Method of removal cyanotoxin using the biosorbent | |
| CN108671897B (en) | Preparation and application of modified straw fiber adsorbing material | |
| CN106219715A (en) | A kind of preparation method of oxidation modification Pericarpium Musae coagulant | |
| CN113582283B (en) | Micro-nano bubble surface function modifier and air-flotation-enhanced water purification method thereof | |
| CN108993409B (en) | Preparation method of biomass-based sewage treatment porous adsorption material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |