CN105344312B - Modified copper water-supply pipe small spherical particles of a kind of iron and the preparation method and application thereof - Google Patents
Modified copper water-supply pipe small spherical particles of a kind of iron and the preparation method and application thereof Download PDFInfo
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- CN105344312B CN105344312B CN201510852508.9A CN201510852508A CN105344312B CN 105344312 B CN105344312 B CN 105344312B CN 201510852508 A CN201510852508 A CN 201510852508A CN 105344312 B CN105344312 B CN 105344312B
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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
- B01J20/02—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
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
- B01J20/0229—Compounds of Fe
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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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/027—Compounds of F, Cl, Br, I
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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
- B01J20/02—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
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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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28019—Spherical, ellipsoidal or cylindrical
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- 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
- C02F1/288—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
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
Abstract
The invention belongs to environmental protection technical fields, and in particular to modified copper water-supply pipe small spherical particles of a kind of iron and the preparation method and application thereof.The modified copper water-supply pipe small spherical particles of the iron, include component as follows in parts by mass: 5.0~10.0 parts by weight of copper water-supply pipe；4.8~9.6 parts by weight of molysite；4.0~8.0 parts by weight of highly basic；6.9~13.8 parts by weight of flyash；5.2~10.4 parts by weight of lime.The iron hydroxide that the absorption property of copper water-supply pipe in the modified copper water-supply pipe small spherical particles of the iron effectively removes the phosphate anion in sewage, and discharges in copper water-supply pipe can make phosphate anion and hydroxyl in sewage generate displacement, to remove phosphate.And the present invention is nontoxic, does not generate secondary pollution, treatment effeciency is high, at low cost.There is great Practical significance to the dephosphorization problem of polluted water region and environmental protection.
Description
Technical field
The invention belongs to environmental protection technical fields, and in particular to a kind of modified copper water-supply pipe small spherical particles of iron and its preparation
Method and application.
Background technique
The phosphorus pollution problem in problem and polluted river is handled for beneficialization of copper water-supply pipe, researchers at home and abroad are equal
A large amount of research has been carried out to it and achieves some achievements.Harmless treatment, without secondary pollution, needle for waterworks sludge
There is certain removal efficiency to the phosphorus pollution in river.Although method is different, substantially sent out along efficient, low energy direction
Exhibition meets the energy-saving and emission-reduction policy of country.
But it is just current in terms of the improvement of copper water-supply pipe removal and the pollution of river phosphorus, it studies still wait improve, water supply is dirty
Mud is a kind of component rich in various metals, there is good adsorptivity and chemical activity, is a kind of good phosphorus adsorbent.And it is right
The removal of phosphorus is always a difficult point in river, be not in the method for current river phosphorus ligands the time it is too long be exactly that expense is high
It is expensive, it is not appropriate for generally using.
Summary of the invention
For overcome the deficiencies in the prior art and disadvantage, the primary purpose of the present invention is that provide a kind of modified water supply of iron dirty
Mud small spherical particles, the particle have the characteristics that efficient, pollution-free, adsorption efficiency is high, Ke Xunhuanliyong.
Another object of the present invention is to provide the preparation methods of the modified copper water-supply pipe small spherical particles of above-mentioned iron.
A further object of the present invention is to provide the applications of the modified copper water-supply pipe small spherical particles of above-mentioned iron.
The purpose of the invention is achieved by the following technical solution:
A kind of modified copper water-supply pipe small spherical particles of iron, include component as follows in parts by mass:
The modified copper water-supply pipe small spherical particles of the iron, preferably comprise following component in parts by mass:
The copper water-supply pipe is selected from water supply plant copper water-supply pipe sedimentation basin bed mud；
The flyash is selected from remaining high-quality fly ash after power plant soot；
The molysite is strong-acid type molysite, preferably iron chloride；
The highly basic is preferably sodium hydroxide；
The preparation method of the modified copper water-supply pipe small spherical particles of the iron, comprises the following steps:
(1) molysite and highly basic are dissolved with water respectively, obtains iron salt solutions and strong base solution；Strong base solution is molten with molysite
Liquid mixes and adjusts pH=7~9, obtains mixture, and the molysite in the mixture is completely converted into ferric hydroxide colloid；
(2) under stirring, mixture made from step (1) is slowly added into copper water-supply pipe and is uniformly mixed,
It is then allowed to stand separation, obtains hypostasis；Dry hypostasis, obtains dried object；
(3) flyash and quick lime are added in the dried object obtained in step (2), grinding is mixed well and is sieved, obtains
To mixture；
(4) mixture made from step (3) is mixed with water, stirring is pelletized and drying, and it is small to obtain the modified copper water-supply pipe of iron
Ball particle；
Time of repose described in step (2) is preferably 16~for 24 hours；
Separation described in step (2) is preferably using centrifuge separation；
The revolving speed of the centrifugation is not less than 4000r/min；The time of the centrifugation is preferably 5~10min；
The temperature of drying described in step (2) is preferably 75~100 DEG C；
The time of drying described in step (2) is preferably 10~for 24 hours；
The mesh number of sieving described in step (3) is preferably 100~300 mesh；
The dosage of water described in step (4) is 15.3~30.6 parts by weight；
The temperature of drying described in step (4) is preferably 20~100 DEG C；
The partial size of the modified copper water-supply pipe small spherical particles of iron described in step (4) is preferably 0.4~0.7cm；
Application of the modified copper water-supply pipe small spherical particles of the iron in field of waste water treatment；
The principle of the present invention: wherein copper water-supply pipe is obtained from common water supply plant clarifier sludge, in the present invention as at
Ball particle matrix, while playing suction-operated；Sodium hydroxide plays carrier function, carries iron ion doping and feeds sewage sludge particle；Chlorine
Change iron and iron ion is provided；Lime plays binder, and improves copper water-supply pipe granule strength and service life；Flyash mainly rises
Adsorption effect is improved in fluffing action, the gap of gaining water-supplying mud granule.
The present invention can efficiently use copper water-supply pipe: first is that sewage can be effectively removed using the absorption property of copper water-supply pipe
In phosphate anion；Second is that the phosphate anion in sewage can be made using the iron hydroxide discharged in copper water-supply pipe
Displacement is generated with hydroxyl, to remove phosphate；Both mechanism, which can effectively remove in sewage, contains phosphor contaminant.Together
When, the present invention be using copper water-supply pipe as raw material, on the basis of cheap and easy to get can also waste utilization, reduce water supply plant
Treatment of Sludge cost；And the present invention is nontoxic, does not generate secondary pollution, and treatment effeciency is high.Dephosphorization to polluted water region
Problem and environmental protection have great Practical significance.
The present invention has the following advantages and effects with respect to the prior art:
Present invention uses copper water-supply pipes, in use will not personnel and ambient enviroment cause to poison and pollute；It fills
Divide and copper water-supply pipe self character is utilized, avoids the waste of the metal ion in copper water-supply pipe, environmental-protecting performance is superior；The present invention
Cheap, granulation is simple, and easy to use, Phosphate Sorption effect is good, can effectively remove the phosphor contaminant under low concentration.The present invention exists
River micropollution substance is removed, in terms of administering lake water eutrophication, especially to the Adsorption of phosphorus, there is great positive meaning
Justice.
Detailed description of the invention
Fig. 1 is the modified copper water-supply pipe small spherical particles electron microscope of iron that embodiment 1 is prepared.
Fig. 2 is the modified copper water-supply pipe small spherical particles electron microscope of iron that embodiment 2 is prepared.
Fig. 3 is the modified copper water-supply pipe small spherical particles electron microscope of iron that embodiment 3 is prepared.
Specific embodiment
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Characteristic is administered for low concentration pollutant, present invention proportion mode is as follows, can effectively achieve the desired results.
Embodiment 1
A kind of modified copper water-supply pipe small spherical particles of iron, include component as follows in parts by mass:
The preparation method of the modified copper water-supply pipe small spherical particles of the iron, comprises the following steps:
(1) iron chloride of 4.8 parts by weight and the sodium hydroxide of 4 parts by weight are sufficiently dissolved with water respectively, it is molten obtains molysite
Liquid and strong base solution；Iron salt solutions and strong base solution are mixed and adjusted pH=9, obtain mixture；
(2) mixture made from step (1) is added drop-wise in the copper water-supply pipe of 5 parts by weight, is stirred continuously to uniformly mixed；
It is then allowed to stand for 24 hours and 4000r/min is centrifuged the isolated sediment of 5min；Sediment is dried for 24 hours at 75 DEG C, obtains dried object；
(3) flyash and the life of 6.9 parts by weight and 5.2 parts by weight are sequentially added in the dried object obtained in step (2)
Lime, grinding mix well, and sieve with 100 mesh sieve, and obtain mixture；
(4) mixture made from step (3) is mixed with the water of 15.3 mass parts, is stirred, pelletized with granulator and 20
It is dry at DEG C, it obtains iron and is modified copper water-supply pipe small spherical particles (d=0.5cm) (Fig. 1), the bead partial size is uniform in size；
Accurately to obtain the modified copper water-supply pipe particle of the iron in the present embodiment to the Adsorption effect of phosphorus, at three
Pending water: 1. new pool sewage plant secondary clarifier effluent；2. Helen fort landscape water；3. river water in the tributary of Dong Jiang；
Three kinds of water sources respectively take 100mL, are filtered, are centrifuged respectively, supernatant is taken to measure absorbance respectively, and three kinds of water are obtained
The initial p concentration of matter；Then it takes three kinds of water quality 0.5L in reaction flask respectively, is sequentially placed into the modified copper water-supply pipe small spherical particles of iron
It each 5, is placed in common concussion case and shakes for 24 hours or more, take out three kinds of treated waters later, filtered, be centrifuged, take supernatant
Liquid measures absorbance, obtains by effluent quality after the modified small spherical particles absorption of iron, the results are shown in Table 1:
Iron is modified copper water-supply pipe small spherical particles implementation result situation in 1 embodiment 1 of table
| Water quality type | New pool sewage plant secondary clarifier effluent | Helen fort landscape water | City inland river water |
| Total phosphorus concentration (mg/L) | 0.410 | 0.060 | 0.450 |
| Dosage (grain) | 5 | 5 | 5 |
| Total phosphorus concentration (mg/L) after absorption | 0.150 | 0.025 | 0.031 |
| Removal rate (%) | 63.40 | 58.30 | 93.11 |
| Service life (year) | 5 | 5 | 5 |
Embodiment 2
A kind of modified copper water-supply pipe small spherical particles of iron, include component as follows in parts by mass:
The preparation method of the modified copper water-supply pipe small spherical particles of the iron, comprises the following steps:
(1) iron chloride of 7.2 parts by weight and the sodium hydroxide of 6.0 parts by weight are sufficiently dissolved with water respectively, obtains molysite
Solution and strong base solution；Iron salt solutions and strong base solution are mixed and adjusted pH=8, obtain mixture；
(2) mixture made from step (1) is added drop-wise in the copper water-supply pipe of 7.5 parts by weight, is stirred continuously equal to mixing
It is even；It is then allowed to stand 20h and the 4000r/min centrifugation isolated sediment of 10min；80 DEG C of drying 20h of sediment, obtain drying
Object；
(3) flyash and the life of 10.2 parts by weight and 7.8 parts by weight are sequentially added in the dried object obtained in step (2)
Lime, grinding mix well, and sieve with 100 mesh sieve, and obtain mixture；
(4) mixture made from step (3) is mixed with the water of 24 mass parts, is stirred, pelletized with granulator and at 75 DEG C
Lower drying obtains iron and is modified copper water-supply pipe small spherical particles (d=0.5cm) (Fig. 2), and the bead partial size is uniform in size；
Accurately to obtain the modified copper water-supply pipe particle of the iron in the present embodiment to the Adsorption effect of phosphorus, at three
Pending water: 1. new pool sewage plant secondary clarifier effluent；2. Helen fort landscape water；3. river water in the tributary of Dong Jiang；
Three kinds of water sources respectively take 100mL, are filtered, are centrifuged respectively, supernatant is taken to measure absorbance respectively, and three kinds of water are obtained
The initial p concentration of matter；Then it takes three kinds of water quality 0.5L in reaction flask respectively, is sequentially placed into the modified copper water-supply pipe small spherical particles of iron
It each 5, is placed in common concussion case and shakes for 24 hours or more, take out three kinds of treated waters later, filtered, be centrifuged, take supernatant
Liquid measures absorbance, obtains by effluent quality after the modified small spherical particles absorption of iron, the results are shown in Table 2:
Iron is modified copper water-supply pipe small spherical particles implementation result situation in 2 embodiment 2 of table
| Water quality type | New pool sewage plant secondary clarifier effluent | Helen fort landscape water | City inland river water |
| Total phosphorus concentration (mg/L) | 0.410 | 0.060 | 0.450 |
| Dosage (grain) | 5 | 5 | 5 |
| Total phosphorus concentration (mg/L) after absorption | 0.130 | 0.015 | 0.022 |
| Removal rate (%) | 67.00 | 75.30 | 95.02 |
| Service life (year) | 5 | 5 | 5 |
Embodiment 3
A kind of modified copper water-supply pipe small spherical particles of iron, include component as follows in parts by mass:
The preparation method of the modified copper water-supply pipe small spherical particles of the iron, comprises the following steps:
(1) iron chloride of 9.6 parts by weight and the sodium hydroxide of 4 parts by weight are sufficiently dissolved with water respectively, it is molten obtains molysite
Liquid and strong base solution；Iron salt solutions and strong base solution are mixed and adjusted pH=7, obtain mixture；
(2) mixed liquor made from step (1) is added drop-wise in the copper water-supply pipe of 10 parts by weight, is stirred continuously equal to mixing
It is even；It is then allowed to stand for 24 hours and 4000r/min is centrifuged the isolated sediment of 7min；Sediment obtains drying in 105 DEG C of drying 10h
Object；
(3) sequentially added in the dried object obtained in step (2) 13.8 parts by weight and 10.4 parts by weight flyash and
Quick lime, grinding mix well, and sieve with 100 mesh sieve, and obtain mixture；
(4) mixture made from step (3) is mixed with the water of 30.6 mass parts, stirs, is pelletized and dried with granulator
It 95 DEG C, obtains iron and is modified copper water-supply pipe small spherical particles (d=0.5cm) (Fig. 3), the bead partial size is uniform in size
Accurately to obtain the modified copper water-supply pipe particle of the iron in the present embodiment to the Adsorption effect of phosphorus, at three
Pending water: 1. new pool sewage plant secondary clarifier effluent；2. Helen fort landscape water；3. river water in the tributary of Dong Jiang；
Three kinds of water sources respectively take 100mL, are filtered, are centrifuged respectively, supernatant is taken to measure absorbance respectively, and three kinds of water are obtained
The initial p concentration of matter；Then it takes three kinds of water quality 0.5L in reaction flask respectively, is sequentially placed into the modified copper water-supply pipe small spherical particles of iron
It each 5, is placed in common concussion case and shakes for 24 hours or more, take out three kinds of treated waters later, filtered, be centrifuged, take supernatant
Liquid measures absorbance, obtains effluent quality after the modified small spherical particles absorption of iron, the results are shown in Table 3:
Iron is modified copper water-supply pipe small spherical particles implementation result situation in 3 embodiment 3 of table
| Water quality type | New pool sewage plant secondary clarifier effluent | Helen fort landscape water | City inland river water |
| Total phosphorus concentration (mg/L) | 0.410 | 0.060 | 0.450 |
| Dosage (grain) | 5 | 5 | 5 |
| Total phosphorus concentration (mg/L) after absorption | 0.170 | 0.019 | 0.028 |
| Removal rate (%) | 58.90 | 68.30 | 95.80 |
| Service life (year) | 5 | 5 | 5 |
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (4)
1. a kind of modified copper water-supply pipe small spherical particles of iron, which is characterized in that by including that following raw material in parts by mass is made:
The preparation method of the modified copper water-supply pipe small spherical particles of the iron, comprises the following steps:
(1) molysite and highly basic are dissolved with water respectively, obtains iron salt solutions and strong base solution；Strong base solution and iron salt solutions are mixed
Merge and adjust pH=7~9, obtains mixture；
(2) under stirring, mixture made from step (1) is slowly added into copper water-supply pipe and is uniformly mixed, then
Settle and separate obtains hypostasis；Dry hypostasis, obtains dried object；
(3) flyash and quick lime are added in the dried object obtained in step (2), grinding is mixed well and is sieved, mixed
Close object；
(4) mixture made from step (3) is mixed with water, stirring is pelletized and drying, obtains the modified small variole of copper water-supply pipe of iron
Grain；
The molysite is iron chloride；
The highly basic is sodium hydroxide.
2. the modified copper water-supply pipe small spherical particles of iron according to claim 1, which is characterized in that by comprising pressing mass parts as follows
The raw material of meter is made:
3. the preparation method of the modified copper water-supply pipe small spherical particles of the described in any item iron of claim 1~2, it is characterised in that include
Following steps:
(1) molysite and highly basic are dissolved with water respectively, obtains iron salt solutions and strong base solution；Strong base solution and iron salt solutions are mixed
Merge and adjust pH=7~9, obtains mixture；
(2) under stirring, mixture made from step (1) is slowly added into copper water-supply pipe and is uniformly mixed, then
Settle and separate obtains hypostasis；Dry hypostasis, obtains dried object；
(3) flyash and quick lime are added in the dried object obtained in step (2), grinding is mixed well and is sieved, mixed
Close object；
(4) mixture made from step (3) is mixed with water, stirring is pelletized and drying, obtains the modified small variole of copper water-supply pipe of iron
Grain；
Time of repose described in step (2) be 16~for 24 hours；
The temperature of drying described in step (2) is 75~100 DEG C；
The mesh number of sieving described in step (3) is 100~300 mesh；
The temperature of drying described in step (4) is 20~100 DEG C；
The partial size of the modified copper water-supply pipe small spherical particles of iron described in step (4) is 0.4~0.7cm.
4. application of the modified copper water-supply pipe small spherical particles of the described in any item iron of claim 1~2 in field of waste water treatment.
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| CN105858788A (en) * | 2016-04-28 | 2016-08-17 | 苏州望意阳环保科技有限公司 | Sewage purifying ball and preparation method thereof |
| CN109734189A (en) * | 2019-01-21 | 2019-05-10 | 河南永泽环境科技有限公司 | A kind of novel iron rust modified aluminium sludge substrate artificial swamp |
| CN110227409A (en) * | 2019-06-10 | 2019-09-13 | 华侨大学 | A kind of method of purification plant sludge preparation magnetic lock phosphorus agent |
| CN113117654A (en) * | 2021-05-21 | 2021-07-16 | 江西中江环保集团股份有限公司 | Preparation method of adsorbent based on municipal sludge |
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