CN106800327A - A kind of method that Electro Sorb removes iron ion in water removal - Google Patents
A kind of method that Electro Sorb removes iron ion in water removal Download PDFInfo
- Publication number
- CN106800327A CN106800327A CN201710030614.8A CN201710030614A CN106800327A CN 106800327 A CN106800327 A CN 106800327A CN 201710030614 A CN201710030614 A CN 201710030614A CN 106800327 A CN106800327 A CN 106800327A
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- Prior art keywords
- carbon fiber
- activated carbon
- electro sorb
- water
- iron ion
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Classifications
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4691—Capacitive deionisation
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
-
- 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
- C02F2101/203—Iron or iron compound
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The present invention relates to a kind of method of water-treatment technology field, the method for specifically removing iron ion in water removal as electrode material Electro Sorb by the use of souring activity Carbon fibe.The present invention is achieved by the following technical solutions, specifically includes following steps：(1) the hydrochloric Acid Modification treatment of Activated Carbon Fiber Electrodes；(2) Activated Carbon Fiber Electrodes electric adsorption module is assembled；(3) iron ion in water is adsorbed and is desorbed by changing the operating voltage of electric adsorption module, flow of inlet water, water inlet iron concentration condition.The advantage of the invention is that：Method is simple for Activated Carbon Fiber Electrodes acidifying, to environment non-secondary pollution, easily makes, high to the adsorption efficiency of iron ion in water with Activated Carbon Fiber Electrodes, simple to operate, can continuously recycle.
Description
Technical field
The present invention relates to a kind of method of water-treatment technology field, specifically by the use of souring activity Carbon fibe as electrode material
Material Electro Sorb removes Fe in water removal2+The method of ion, the method removal rate is fast, does not produce secondary pollution.
Background technology
Although iron is to humans and animals toxicity very little, when the concentration of iron compound is 0.1~0.3mg/L in water body, can shadow
The color of Xiangshui County, smell, the sensory properties such as taste.For example, the concentration of some iron compounds contained in water body reaches 0.04mg/L, will
There is peculiar smell.When iron content is too high in printing and dyeing industry water, product is often set ugly spot occur.Therefore, as plastics, spinning
Knit, papermaking, brewage use water with food industry, the requirement to iron-holder is more taller than drinking water.It is existing in China《Industry
" three wastes " discharge tentative standard》In, the content of iron is not imposed any restrictions.If but directly discharge iron content waste water, exist in waste water
Dissolubility iron ion cause the dissolved oxygen in water body to reduce rapidly, draining is red orange and muddiness, and serious dirt is caused to environment
Dye.
Capacitive deionization (capacitive deionization, CDI), also known as Electro Sorb (electrosorption), is
A kind of new type water that water intermediate ion and charged particle, purifying water body intermediate ion and charged particle are adsorbed using powered electrode surface
Treatment technology, its advantage is：Removal process is not related to redox reaction, and energy consumption is low；Electrode after adsorption saturation can be by applying
Plus backward voltage or the mode of short circuit are regenerated, regenerative operation is easy；Go during deionization that other auxiliary materials need not be added
Material, does not produce secondary pollution；Do not have to chemically react in whole removal and regenerative process, electrode life is long.Therefore phase
Than removing iron handling process in tradition, capacitive deionization technology is preceding in the great application of application field of the heavy metal containing wastewater treatments such as iron content
Scape.
NACF is that a kind of intensity is big, density is small, corrosion resistant novel metalloid material.Due to NACF tool
There is specific surface area big, porous body product is big and the features such as small resistivity, necessarily applied as electric adsorption electrode material.It is living
Property Carbon fibe there is continuous block structure, can be directly used as electric adsorption electrode, therefore manufacture craft and reduction can be simplified making
Use cost.
The content of the invention
The method that a kind of Electro Sorb of present invention design removes iron ion in water removal, including step in detail below：
(1) NACF acidification：Salt acid soak is used, substantial amounts of deionized water rinsing is then used, until pH value is
Neutrality, conductivity value is less than 5 μ Scm-1.110 DEG C of drying in baking oven are positioned over, are placed in drier and are obtained souring activity Carbon fiber
Dimension；
(2) Activated Carbon Fiber Electrodes are prepared：Souring activity Carbon fibe in step (1) is cut into block size to be lived
Property Carbon fibe electrode；
(3) Electro Sorb goes water removal during the Activated Carbon Fiber Electrodes assembling that will be obtained in step (2) is arranged on electric adsorption module
Middle iron ion；
(4) Electro Sorb method removes iron ion in water removal：Configuration ferric ion solutions, measure ferric ion solutions in beaker, will walk
Suddenly the Activated Carbon Fiber Electrodes electric adsorption module for being assembled in (3) carries out Electro Sorb experiment.Electro Sorb experiment utilizes wriggling pumping
Take the ferric ion solutions in beaker and enter into electric adsorption module, be finally recycled in beaker, while being supervised in real time using conductivity meter
The change of electrical conductivity in solution is surveyed, when electrical conductivity keeps constant, i.e., Activated Carbon Fiber Electrodes reach adsorption equilibrium.
(5) desorption and regeneration of Activated Carbon Fiber Electrodes：When Activated Carbon Fiber Electrodes reach adsorption saturation, electric suction will be applied to
Voltage short circuit or removal in attached module, the electrical conductivity in solution will be gradually restored to initial value, and electrode has obtained desorption and regeneration.
The concentration of the hydrochloric acid described in step (1) is 1molL-1, soak time is 3h, and pH value is close to 6.9.
Activated Carbon Fiber Electrodes size described in step (2) is 5cm × 5cm.
The metal ion that Activated Carbon Fiber Electrodes Electro Sorb described in step (3) is gone in water removal is Fe2+。
Heavy metal ion Fe described in step (4)2+Concentration be 100mg/L, operating voltage is 1.4V, and flow of inlet water is
15ml/min。
The advantage of the invention is that：Method is simple for NACF acidified modified, easily makes and environmental protection is without two
Secondary pollution, has efficiency high by the use of modified Activated Carbon Fiber Electrodes as the electrode of electric adsorption module, simple to operate, material
Easily it is obtained and the recycling performance of material has greatly improved with without modified material tool.
Brief description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is the modified scanning electron microscope (SEM) photograph (SEM figures) of the NACF prepared in embodiment one；
Fig. 2 is solution Fe in embodiment two2+Initial concentration is to Fe2+The influence of clearance；
Fig. 3 be embodiment three in operating voltage to Fe2+The influence of clearance；
Fig. 4 be example IV in flow of inlet water to Fe2+The influence of clearance；
Fig. 5 is the adsorption/desorption regeneration times of Activated Carbon Fiber Electrodes in embodiment five to being adsorbed in the influence of desorption rate.
Specific embodiment
Embodiments of the invention are elaborated below：The present embodiment is carried out under premised on technical solution of the present invention
Implement, give detailed implementation method, but protection scope of the present invention is not limited to following embodiments.
Embodiment one
The pretreatment of NACF：NACF is cut into the size of 5cm × 5cm, 1molL is used-1Hydrochloric acid
Immersion 3h, to remove the ash content on NACF surface, then uses substantial amounts of deionized water rinsing, until pH value is neutrality, electricity
Conductivity value is less than 5 μ Scm-1.110 DEG C of drying in baking oven are positioned over, are placed in drier.
Embodiment two
The acidified modified rear electrode production process of NACF is identical with embodiment one.
Electric adsorption module to Activated Carbon Fiber Electrodes composition carries out the experiment that Electro Sorb removes iron ion in water removal.Electricity is inhaled
Attached experiment condition is arranged to voltage for 1.0V, and flow of inlet water is 10mL/min, and pole plate spacing is controlled under conditions of 1mm, respectively
Have studied iron ion initial concentration NACF Electro Sorb removal iron in 150mg/L, 120mg/L, 100mg/L, 70mg/L
The effect of ion.Experimental result is as shown in Figure 2, it is seen that modified activated fibre electrode pair Fe2+With preferable adsorption effect.
Embodiment three
The acidified modified rear electrode production process of NACF is identical with embodiment one.
It is the ferric ion solutions of 150mg/L to choose initial concentration, and electrode spacing is isolated by being clipped in two interelectrode non-woven fabrics,
Spacing is controlled in 1mm, controls flow of inlet water for 10ml/min, and the work electricity of 0V, 1.0V, 1.2V, 1.4V, 1.6V is applied respectively
Pressure, electric adsorption module is assembled into Activated Carbon Fiber Electrodes carries out Electro Sorb and go iron ions to test, as a result as Fig. 3 shows.It can be seen that
Modified activated fibre electrode pair Fe in the case of operating voltage is suitable2+With preferable adsorption effect.
Example IV
The acidified modified rear electrode production process of NACF is identical with embodiment one.
Experiment condition have chosen iron concentration for 100mg/L, and operating voltage is controlled in 1.4V, and electrode spacing is by being clipped in two
Interelectrode non-woven fabrics isolation, spacing control have studied the adsorption effect of Activated Carbon Fiber Electrodes in 1mm.
Embodiment five
The acidified modified rear electrode production process of NACF is identical with embodiment one.
The electric adsorption electrode being made modified to NACF is circulated Electro Sorb experiment.By Activated Carbon Fiber Electrodes
In electric adsorption module, applying operating voltage is 1.4V, and flow of inlet water control is desorbed concentration in 15ml/min circulation absorptions
It is the Fe of 100mg/L2+Solution, calculates its adsorption rate and desorption rate.Experimental result is as shown in Figure 5.First time circulation absorption is desorbed
After experiment, the adsorption rate of NACF is 52.19%, by after five circulation absorption detachment assays, clearance reduced by only
7.13%, illustrate that the material has high regenerability.
Claims (6)
1. a kind of method that Electro Sorb removes iron ion in water removal, it is characterised in that specifically include following steps：
(1) NACF acidification：Salt acid soak is used, substantial amounts of deionized water rinsing is then used, until pH value is neutrality,
Conductivity value is less than 5 μ Scm-1.110 DEG C of drying in baking oven are positioned over, are placed in drier and are obtained souring activity Carbon fibe；
(2) Activated Carbon Fiber Electrodes are prepared：Souring activity Carbon fibe in step (1) is cut into block size and obtains activated carbon
Fiber electrode；
(3) Electro Sorb removes removing ferro in water during the Activated Carbon Fiber Electrodes assembling that will be obtained in step (2) is arranged on electric adsorption module
Ion；
(4) Electro Sorb method removes iron ion in water removal：Configuration ferric ion solutions, measure ferric ion solutions in beaker, by step (3)
In the Activated Carbon Fiber Electrodes electric adsorption module that assembles carry out Electro Sorb experiment.Electro Sorb experiment utilizes peristaltic pump pumps beaker
In ferric ion solutions enter into electric adsorption module, be finally recycled in beaker, while using conductivity meter real-time monitoring solution
The change of middle electrical conductivity, when electrical conductivity keeps constant, i.e., Activated Carbon Fiber Electrodes reach adsorption equilibrium.
(5) desorption and regeneration of Activated Carbon Fiber Electrodes：When Activated Carbon Fiber Electrodes reach adsorption saturation, Electro Sorb mould will be applied to
Voltage short circuit or removal on block, the electrical conductivity in solution will be gradually restored to initial value, and electrode has obtained desorption and regeneration.
2. the method that a kind of Electro Sorb as described in claim 1 step removes iron ion in water removal, it is characterised in that step (1)
Described in hydrochloric acid concentration be 1molL-1, soak time is 3h, and pH value is close to 6.9.
3. the method that a kind of Electro Sorb as claimed in claim 1 removes iron ion in water removal, it is characterised in that institute in step (2)
The Activated Carbon Fiber Electrodes size stated is 5cm × 5cm.
4. the method that a kind of Electro Sorb as described in right 1 removes iron ion in water removal, it is characterised in that the work described in step (3)
Property Carbon fibe electrode Electro Sorb go water removal in metal ion be Fe2+。
5. the method that a kind of Electro Sorb as described in right 1 removes iron ion in water removal, it is characterised in that the electricity described in step (3)
The electrode logarithm of adsorption module is 3 pairs.
6. the method that a kind of Electro Sorb as described in right 1 removes iron ion in water removal, it is characterised in that the gold described in step (4)
Category ion Fe2+Concentration be 100mg/L, operating voltage is 1.4V, and flow of inlet water is 15ml/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710030614.8A CN106800327A (en) | 2017-01-17 | 2017-01-17 | A kind of method that Electro Sorb removes iron ion in water removal |
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| CN201710030614.8A CN106800327A (en) | 2017-01-17 | 2017-01-17 | A kind of method that Electro Sorb removes iron ion in water removal |
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| CN106800327A true CN106800327A (en) | 2017-06-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108479706A (en) * | 2018-04-25 | 2018-09-04 | 浙江省林业科学研究院 | A kind of modification bamboo charcoal and its preparation method and application |
| CN111606332A (en) * | 2020-06-05 | 2020-09-01 | 四川轻化工大学 | Method for purifying ammonium bicarbonate by using electric adsorption |
Citations (1)
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|---|---|---|---|---|
| CN103708587A (en) * | 2014-01-03 | 2014-04-09 | 长沙皓龙环保科技有限公司 | Preparation method of composite electrode for removing arsenic in water based on electro-adsorption and method for removing arsenic |
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2017
- 2017-01-17 CN CN201710030614.8A patent/CN106800327A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708587A (en) * | 2014-01-03 | 2014-04-09 | 长沙皓龙环保科技有限公司 | Preparation method of composite electrode for removing arsenic in water based on electro-adsorption and method for removing arsenic |
Non-Patent Citations (2)
| Title |
|---|
| 李海红 等: "盐酸预处理对ACF结构及其电化学性能的影响", 《材料科学与工程学报》 * |
| 王翠 等: "活性炭纤维电极对不同阳离子电吸附行为的试验研究", 《中国新技术新产品》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108479706A (en) * | 2018-04-25 | 2018-09-04 | 浙江省林业科学研究院 | A kind of modification bamboo charcoal and its preparation method and application |
| CN108479706B (en) * | 2018-04-25 | 2021-04-02 | 浙江省林业科学研究院 | Modified bamboo charcoal and preparation method and application thereof |
| CN111606332A (en) * | 2020-06-05 | 2020-09-01 | 四川轻化工大学 | Method for purifying ammonium bicarbonate by using electric adsorption |
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