CN109231387B - Straw/polyaluminium chloride composite water treatment material and preparation method thereof - Google Patents
Straw/polyaluminium chloride composite water treatment material and preparation method thereof Download PDFInfo
- Publication number
- CN109231387B CN109231387B CN201811191018.9A CN201811191018A CN109231387B CN 109231387 B CN109231387 B CN 109231387B CN 201811191018 A CN201811191018 A CN 201811191018A CN 109231387 B CN109231387 B CN 109231387B
- Authority
- CN
- China
- Prior art keywords
- straw
- water treatment
- polyaluminium chloride
- treatment material
- composite 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.)
- Active
Links
Classifications
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular 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
- C02F2101/10—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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a straw/polyaluminium chloride composite water treatment material and a preparation method thereof. The composite water treatment material adopts industrial waste fly ash and agricultural waste straw as raw materials, has low price and can be prepared at normal temperature and normal pressure; the obtained composite material has good flocculation performance and good treatment capacity on wastewater, can not only exert the advantages of the aluminum salt polymer in the water treatment process, but also reduce the residual quantity of aluminum ions in aqueous solution after the aluminum salt polymer treats the wastewater, can improve the negative effect caused by the aluminum ions entering the water environment to the maximum extent, solves the problem of overhigh concentration of the aluminum ions in the water treated by the traditional aluminum salt flocculating agent, can effectively avoid the harm to the health of human bodies, and is suitable for large-scale wastewater treatment.
Description
Technical Field
The invention belongs to the technical field of material preparation, and particularly relates to a straw/polyaluminium chloride composite water treatment material and a preparation method thereof.
Background
The straw is from agricultural wastes, is a renewable resource in nature, is rich in cellulose, hemicellulose and lignin, is distributed with a large amount of active groups such as hydroxyl groups on a molecular chain, can be used as an organic polymer with low price, and has good flocculation and complexing adsorption effects on pollutants in a water body.
The fly ash is the main solid waste discharged by a coal-fired power plant, and the main oxides of the fly ash comprise: SiO 22、Al2O3、FeO、Fe2O3、CaO、TiO2And the like. Al of these oxides2O3The highest content reaches about 60 percent, and Al2O3The flocculant is a raw material for producing polyaluminium salt, and polyaluminium chloride serving as a traditional flocculant has good flocculation performance and shows good application prospect in the aspect of pollutant flocculation removal in recent years. But single poly-chlorinationIn the process of treating water, the aluminum flocculant can often increase the concentration of aluminum ions in the solution, and the high concentration of the aluminum ions in the water can cause human health problems such as senile dementia and the like.
The invention is based on the excellent structural components of the straw and the fly ash, and the composite water treatment material of the straw and the polyaluminium chloride is prepared by taking the straw as a raw material through a liquid phase method, so that the good adsorption flocculation property of the straw can be utilized, the flocculation effect of the aluminium salt can be enhanced, the contact between the polyaluminium salt and organic pollutants is increased, and the water treatment efficiency is improved.
Disclosure of Invention
The invention aims to provide a straw/polyaluminium chloride composite water treatment material and a preparation method thereof, wherein the composite water treatment material prepared by taking cheap and easily-obtained straws and industrial waste fly ash as raw materials has a good flocculation effect on organic pollutants such as dyes in water, and is suitable for large-scale treatment of wastewater.
In order to achieve the purpose, the invention adopts the following technical scheme:
a composite water treatment material of straw/polyaluminium chloride is prepared by adopting a liquid phase method, taking fly ash as a raw material to prepare polyaluminium chloride powder, and compounding the polyaluminium chloride powder with straw straws to prepare the composite water treatment material.
The preparation method of the straw/polyaluminium chloride composite water treatment material comprises the following steps:
1) soaking the fly ash in 10-30 wt% hydrochloric acid solution for 5-8 hours according to the amount of 3mL/g, then adding 20-30 wt% sodium hydroxide solution to adjust the pH value to 11-13, filtering, adding 10-20 wt% hydrochloric acid solution into the obtained filtrate according to the volume ratio of 1:1, and reacting for 1.5 hours at 70-90 ℃ under the stirring condition; filtering and separating after the reaction is finished to obtain filtrate containing aluminum chloride, adding calcium carbonate powder into the obtained filtrate to adjust the basicity, stirring, filtering, and drying the filtrate to obtain the polyaluminum chloride powder;
2) at room temperature, washing the straw stalks with water to remove soil, drying, crushing, adding the crushed straw stalks into a sodium hydroxide solution with the weight of 5-15 wt%, quickly and uniformly stirring, then slowly stirring for 24 hours, and then centrifuging, filtering and drying a filter cake to obtain straw powder;
3) adding water into the aluminium polychlorid powder obtained in the step 1) to prepare a solution with the weight percent of 20-30%, then adding the straw powder obtained in the step 2), and stirring in a water bath at the temperature of 50-80 ℃ for 6-8 hours until floccules are separated out;
4) filtering the suspension obtained in the step 3), washing the obtained precipitate with ethanol for 3 times, and drying to obtain the composite water treatment material.
In the step 1), 0.3-0.4 g of calcium carbonate powder is added into each gram of fly ash.
The rotating speed of the rapid stirring in the step 2) is 200-250 r/min, and the rotating speed of the slow stirring is 120-150 r/min.
The weight ratio of the polyaluminium chloride powder to the straw powder in the step 3) is 1: 2.
Compared with the prior art, the invention has the following advantages and effects:
(1) based on the characteristic that the fly ash is rich in aluminum chloride, the fly ash which is an industrial waste is treated to prepare polyaluminium chloride by a liquid phase method, then the straws are dispersed in the polyaluminium chloride aqueous solution, organic polymer straws are infiltrated into inorganic polymer polyaluminium chloride through the physical and chemical adsorption, and hydroxyl groups on the straws are bonded with hydroxyl groups in the polyaluminium chloride through hydrogen bonds, so that the novel organic-inorganic polymer composite water treatment material is formed. The composite water treatment material has higher specific surface area and good adsorption flocculation capability, has better adsorption flocculation effect on inorganic and organic pollutants such as heavy metal ions, dyes and the like in wastewater, and is suitable for large-scale wastewater treatment.
(2) The composite water treatment material not only maintains the flocculation performance of polyaluminium chloride, but also can reduce the residual quantity of aluminum ions in water after the aluminum salt polymer treats wastewater, furthest improves the negative effect caused by the aluminum ions entering the environment, solves the problem of overhigh concentration of the aluminum ions in water after the traditional aluminum salt flocculant treatment, and can effectively avoid the harm to the human health.
(3) According to the preparation method, a NaOH solution with the mass volume concentration of 5-15% is used as a solvent, so that on one hand, the regular structure of the straw is damaged, the crystallinity of the straw is reduced, and on the other hand, active groups in the straw can easily form hydrogen bonds with water molecules, so that the dissolution of the straw is improved.
(4) The invention adopts industrial and agricultural solid wastes as raw materials to prepare the composite water treatment material without secondary pollution, and has the advantages of rich raw material sources, simple preparation process, mild reaction conditions and easy control of process parameters.
Detailed Description
In order to make the present invention more comprehensible, the technical solutions of the present invention are further described below with reference to specific embodiments, but the present invention is not limited thereto.
Example 1:
1) placing 20g of fly ash into a reaction bottle, adding 60 mL of 10wt% hydrochloric acid solution, soaking for 5 hours, then adding 20wt% sodium hydroxide solution, adjusting the pH value to 11, filtering, adding 10wt% hydrochloric acid solution into the obtained filtrate according to the volume ratio of 1:1, and reacting for 1.5 hours at 70 ℃ under the condition of stirring; filtering and separating after the reaction is finished to obtain filtrate containing aluminum chloride, adding 6g of calcium carbonate powder into the obtained filtrate, regulating the basicity, stirring, filtering, and drying the filtrate to obtain the polyaluminum chloride powder (the filtrate which is not dried can also be directly used as a water purifying agent);
2) at room temperature, washing the straw stalks with water to remove soil, drying, crushing, adding the crushed straw stalks into a 5wt% sodium hydroxide solution to prepare a solution with the straw concentration of 2wt%, quickly stirring uniformly at 200 r/min, and slowly stirring for 24 hours at 120 r/min to obtain a light yellow straw solution;
3) centrifuging, filtering and drying a filter cake to obtain straw powder;
4) adding water into the obtained polyaluminium chloride powder to prepare a 20wt% solution, then adding straw powder with the weight 2 times of that of the used polyaluminium chloride powder, and stirring in a water bath at 50 ℃ for 6 hours until floccules are separated out;
5) filtering the suspension obtained in the step 4), washing the obtained precipitate with ethanol for 3 times, and drying to obtain the straw/polyaluminium chloride composite water treatment material.
Example 2:
1) placing 20g of fly ash into a reaction bottle, adding 60 mL of 20wt% hydrochloric acid solution, soaking for 6 hours, then adding 25wt% sodium hydroxide solution, adjusting the pH value to 12, filtering, adding 15wt% hydrochloric acid solution into the obtained filtrate according to the volume ratio of 1:1, and reacting for 1.5 hours at 80 ℃ under the condition of stirring; filtering and separating after the reaction is finished to obtain filtrate containing aluminum chloride, adding 7g of calcium carbonate powder into the obtained filtrate, regulating the basicity, stirring, filtering, and drying the filtrate to obtain the polyaluminum chloride powder (the filtrate which is not dried can also be directly used as a water purifying agent);
2) at room temperature, washing the straw stalks with water to remove soil, drying, crushing, adding the crushed straw stalks into a 10wt% sodium hydroxide solution to prepare a solution with the straw concentration of 3wt%, quickly and uniformly stirring at 230 r/min, and slowly stirring at 130 r/min for 24 hours to obtain a light yellow straw solution;
3) centrifuging, filtering and drying a filter cake to obtain straw powder;
4) adding water into the obtained polyaluminium chloride powder to prepare a 25wt% solution, then adding straw powder with the weight 2 times of that of the used polyaluminium chloride powder, and stirring for 7 hours in a water bath at 70 ℃ until floccules are separated out;
5) filtering the suspension obtained in the step 4), washing the obtained precipitate with ethanol for 3 times, and drying to obtain the straw/polyaluminium chloride composite water treatment material.
Example 3:
1) placing 20g of fly ash into a reaction bottle, adding 60 mL of 30wt% hydrochloric acid solution, soaking for 8 hours, then adding 30wt% sodium hydroxide solution, adjusting the pH value to 13, filtering, adding 10wt% hydrochloric acid solution into the obtained filtrate according to the volume ratio of 1:1 mL, and reacting for 1.5 hours at 90 ℃ under the condition of stirring; filtering and separating after the reaction is finished to obtain filtrate containing aluminum chloride, adding 8g of calcium carbonate powder into the obtained filtrate, regulating the basicity, stirring, filtering, and drying the filtrate to obtain the polyaluminum chloride powder (the filtrate which is not dried can also be directly used as a water purifying agent);
2) at room temperature, washing the straw stalks with water to remove soil, drying, crushing, adding the crushed straw stalks into 15wt% sodium hydroxide solution to prepare solution with the straw concentration of 5wt%, quickly stirring the solution uniformly at a speed of 250 r/min, and slowly stirring the solution for 24 hours at a speed of 150 r/min to obtain light yellow straw solution;
3) centrifuging, filtering and drying a filter cake to obtain straw powder;
4) adding water into the obtained polyaluminium chloride powder to prepare a 30wt% solution, then adding straw powder with the weight 2 times of that of the used polyaluminium chloride powder, and stirring for 10 hours in a water bath at 60 ℃ until floccules are separated out;
5) filtering the suspension obtained in the step 4), washing the obtained precipitate with ethanol for 3 times, and drying to obtain the straw/polyaluminium chloride composite water treatment material.
1. The straw/polyaluminum chloride composite water-treating materials obtained in examples 1-3 and the polyaluminum chloride prepared separately were added to the same batch of collected wastewater (the addition amount was 0.5 g/L) respectively to determine the residual amount of aluminum ions in water after 2L of wastewater was treated with different water-treating materials, and the results are shown in Table 1.
TABLE 1 residual amount of aluminum ions in wastewater after treatment with different water treatment materials
As can be seen from Table 1, compared with the polyaluminium chloride treatment, the straw/polyaluminium chloride composite water treatment material provided by the invention can obviously reduce the residual amount of aluminium ions in the treated wastewater, and can avoid negative effects caused by the fact that the aluminium ions enter the environment.
2. The straw/polyaluminum chloride composite water-treatment materials obtained in examples 1-3, and the polyaluminum chloride and straw powder prepared separately were added to the same batch of collected wastewater (the addition amount was 0.5 g/L) respectively to determine the removal of pollutants contained in the wastewater by the different water-treatment materials, and the results are shown in Table 2.
TABLE 2 removal of contaminants contained in wastewater by different water treatment materials
As can be seen from Table 2, compared with the single use of polyaluminium chloride or straw powder, the composite water treatment material prepared by dispersing the straws into the polyaluminium chloride aqueous solution by using the liquid phase method has good adsorption flocculation capacity, has good adsorption flocculation effect on dyes, heavy metal ions, COD (chemical oxygen demand) and the like in the wastewater, and is suitable for large-scale wastewater treatment.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (5)
1. A preparation method of straw/polyaluminium chloride composite water treatment material is characterized by comprising the following steps: preparing polyaluminium chloride powder by using fly ash as a raw material by adopting a liquid phase method, and compounding the polyaluminium chloride powder with straw stalks to prepare the composite water treatment material; which comprises the following steps:
1) soaking the fly ash in 10-30 wt% hydrochloric acid solution for 5-8 hours, then adding 20-30 wt% sodium hydroxide solution to adjust the pH value to 11-13, filtering, adding 10-20 wt% hydrochloric acid solution into the obtained filtrate according to the volume ratio of 1:1, and reacting for 1.5 hours at 70-90 ℃ under the condition of stirring; filtering and separating after the reaction is finished to obtain filtrate containing aluminum chloride, adding calcium carbonate powder into the obtained filtrate, stirring, filtering, and drying the filtrate to obtain the polyaluminum chloride powder;
2) at room temperature, washing the straw stalks with water to remove soil, drying, crushing, adding the crushed straw stalks into a sodium hydroxide solution with the weight of 5-15 wt%, quickly and uniformly stirring, then slowly stirring for 24 hours, and then centrifuging, filtering and drying a filter cake to obtain straw powder;
3) adding water into the aluminium polychlorid powder obtained in the step 1) to prepare a solution with the weight percent of 20-30%, then adding the straw powder obtained in the step 2), and stirring in a water bath at the temperature of 50-80 ℃ for 6-8 hours until floccules are separated out;
4) filtering the suspension obtained in the step 3), washing the obtained precipitate with ethanol for 3 times, and drying to obtain the composite water treatment material.
2. The preparation method of the straw/polyaluminium chloride composite water treatment material according to claim 1, wherein the straw/polyaluminium chloride composite water treatment material comprises the following steps: in the step 1), 0.3-0.4 g of calcium carbonate powder is added into each gram of fly ash.
3. The preparation method of the straw/polyaluminium chloride composite water treatment material according to claim 1, wherein the straw/polyaluminium chloride composite water treatment material comprises the following steps: the rotating speed of the rapid stirring in the step 2) is 200-250 r/min, and the rotating speed of the slow stirring is 120-150 r/min.
4. The preparation method of the straw/polyaluminium chloride composite water treatment material according to claim 1, wherein the straw/polyaluminium chloride composite water treatment material comprises the following steps: the weight ratio of the polyaluminium chloride powder to the straw powder in the step 3) is 1: 2.
5. A straw/polyaluminium chloride composite water treatment material prepared by the method of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811191018.9A CN109231387B (en) | 2018-10-12 | 2018-10-12 | Straw/polyaluminium chloride composite water treatment material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811191018.9A CN109231387B (en) | 2018-10-12 | 2018-10-12 | Straw/polyaluminium chloride composite water treatment material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109231387A CN109231387A (en) | 2019-01-18 |
| CN109231387B true CN109231387B (en) | 2021-08-31 |
Family
ID=65052060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811191018.9A Active CN109231387B (en) | 2018-10-12 | 2018-10-12 | Straw/polyaluminium chloride composite water treatment material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109231387B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110183685B (en) * | 2019-05-13 | 2022-04-08 | 中国海洋石油集团有限公司 | Rapid gel breaking method for xanthan gum solution |
| CN110690391B (en) * | 2019-10-12 | 2022-04-22 | 福建师范大学 | Coating method of high-safety diaphragm |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5156564A (en) * | 1974-11-11 | 1976-05-18 | Oji Paper Co | |
| CN101172684A (en) * | 2007-10-09 | 2008-05-07 | 王贵明 | Method for industrial production of polymeric aluminum ferric chloride water purification agent with coal ash |
| CN104261541A (en) * | 2014-10-11 | 2015-01-07 | 福建融泉净水剂有限公司 | Straw/polyferric sulfate composite water treatment material and preparation method thereof |
| CN104724737A (en) * | 2015-01-15 | 2015-06-24 | 内蒙古大学 | Method for preparing solid-state efficient flocculant by using coal ash as raw material |
-
2018
- 2018-10-12 CN CN201811191018.9A patent/CN109231387B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5156564A (en) * | 1974-11-11 | 1976-05-18 | Oji Paper Co | |
| CN101172684A (en) * | 2007-10-09 | 2008-05-07 | 王贵明 | Method for industrial production of polymeric aluminum ferric chloride water purification agent with coal ash |
| CN104261541A (en) * | 2014-10-11 | 2015-01-07 | 福建融泉净水剂有限公司 | Straw/polyferric sulfate composite water treatment material and preparation method thereof |
| CN104724737A (en) * | 2015-01-15 | 2015-06-24 | 内蒙古大学 | Method for preparing solid-state efficient flocculant by using coal ash as raw material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109231387A (en) | 2019-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103663617B (en) | A kind of method of wastewater treatment containing grease | |
| CN111592069B (en) | Modified diatomite-nano calcium hydroxide composite sewage treatment agent | |
| CN111453826B (en) | Micro-nano porous polyaluminium coagulant aid and preparation method and application thereof | |
| CN112850867B (en) | Deep defluorination medicament and preparation method thereof | |
| CN109231387B (en) | Straw/polyaluminium chloride composite water treatment material and preparation method thereof | |
| CN110330213B (en) | Efficient composite conditioner for sludge dewatering | |
| CN101182079B (en) | Citric acid mother liquor treatment process | |
| CN106745591A (en) | A kind of preparation method of heavy metal ion adsorbed type composite flocculation agent and products thereof | |
| CN107638872B (en) | Fly ash/magnetic straw composite material and preparation method and application thereof | |
| CN103359907A (en) | Novel environment friendly conditioner for deep dehydration of sludge | |
| CN100463868C (en) | Ecological, environmental protective composite water treatment agent | |
| CN111573799B (en) | Inorganic composite polyaluminum chloride water treatment agent and preparation method thereof | |
| CN109734165B (en) | Sewage treatment flocculant and preparation method thereof | |
| CN111573801A (en) | Organic composite aluminum sulfate water treatment agent and preparation method thereof | |
| CN112679021A (en) | Method for preparing salt from seawater | |
| CN109319948B (en) | Preparation method of nano biological water purifying agent | |
| CN114538555A (en) | Efficient phosphorus removal agent for removing phosphorus from sewage and preparation method thereof | |
| CN102872822A (en) | Composite adsorption material for removing permanganate acid radicals from water and preparation method of composite adsorption material | |
| Xia et al. | Efficient and rapid settling removal of algae by using a novel actinia-shaped composite coagulant | |
| CN111302463A (en) | Polymeric aluminum-iron-magnesium composite flocculant for treating dye wastewater and preparation method thereof | |
| CN112960894B (en) | Special medicament for mud pressing prepared from residues generated in production of polyaluminum chloride | |
| CN115140799B (en) | Printing and dyeing wastewater treatment agent and preparation method thereof | |
| CN112978974B (en) | Papermaking sewage treatment agent and preparation method and application thereof | |
| CN115893540B (en) | Water purifying agent for treating chemical organic wastewater and preparation method thereof | |
| CN115196844B (en) | Method for extracting nitrogen and phosphorus nutrient salt from papermaking sludge |
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 |