WO2005009610A1 - 重金属イオン吸着剤 - Google Patents
重金属イオン吸着剤 Download PDFInfo
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- WO2005009610A1 WO2005009610A1 PCT/JP2004/010336 JP2004010336W WO2005009610A1 WO 2005009610 A1 WO2005009610 A1 WO 2005009610A1 JP 2004010336 W JP2004010336 W JP 2004010336W WO 2005009610 A1 WO2005009610 A1 WO 2005009610A1
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- WIPO (PCT)
- Prior art keywords
- zeolite
- water
- heavy metal
- calcium
- activated carbon
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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
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
- B01J20/183—Physical conditioning without chemical treatment, e.g. drying, granulating, coating, irradiation
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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
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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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
- B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
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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
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3234—Inorganic material layers
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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
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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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
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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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F2101/12—Halogens or halogen-containing compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
Definitions
- the present invention relates to an adsorbent suitable for removing heavy metal ions in water. Especially applied to water purifiers to remove heavy metal ions in tap water, efficiently remove residual chlorine and trihalomethane, and provide safe and delicious water without removing calcium and magnesium ions. And a heavy metal ion adsorbent in water.
- Activated carbon is widely used to remove trihalomethane and residual chlorine contained in tap water.
- heavy metal ions such as lead ions dissolved in a trace amount in tap water have become a new problem, and it is difficult to remove these heavy metal ions with activated carbon alone.
- aluminosilicates represented by zeolite have an ion exchange function in water and a function of adsorbing heavy metal ions in water.
- Patent Document 1 JP-A-61-86985
- Patent Document 2 JP-A-8-132026
- Patent Document 3 JP-A-10-277537
- Patent Document 4 Japanese Utility Model Publication No. 54-6351
- An object of the present invention is to efficiently adsorb not only heavy metal ions (eg, lead, cadmium, copper, mercury silver) but also residual chlorine, trihalomethane and the like in water, particularly tap water, and calcium-magnesium. It is an object of the present invention to provide a heavy metal ion adsorbent that can leave delicious minerals without adsorbing minerals and obtain delicious and healthy water.
- heavy metal ions eg, lead, cadmium, copper, mercury silver
- the inventors of the present invention treat a zeolite with a solution of a water-soluble calcium salt and / or a magnesium salt in advance, whereby the zeolite adsorbs heavy metal ions and forms a mineral of calcium magnesium. Minutes were found not to adsorb. Furthermore, the zeolite treated with this water-soluble calcium salt and / or magnesium salt solution is uniformly attached to activated carbon via a binder, so that minerals are left, and heavy metal ions, residual chlorine and trihalomethane are removed. An adsorbent with excellent removal has been developed.
- a heavy metal ion adsorbent obtained by attaching a zeolite in which at least 60 mol% of the total exchangeable cations are replaced with calcium ions and / or magnesium ions to the surface of activated carbon using a binder,
- the zeolite is a synthetic type A and / or X type.
- Examples of the raw material zeolite used in the present invention include natural zeolites such as chabazite, erionite, mordenite and clinoptilite and sodium-substituted zeolites.
- Examples of synthetic zeolites include various synthetic A-type, X-type, and Y-type zeolites described in “Latest Applications of Zeolite”, p. Ll—p. L3, CMC Corporation.
- the type A is preferably type 4A
- the type X is preferably type 13X. Among them, the 13X type is particularly preferable.
- natural zeolite and synthetic zeolite can be used as a natural zeolite.
- Natural zeolite has a lower ion exchange capacity than synthetic zeolite, so it is necessary to use a larger amount. In addition, it is necessary to pulverize zeolite when attaching it to the activated carbon surface. In the present invention, these zeolites may be used as a mixture with different types.
- the average particle size of the zeolite to be attached to the activated carbon particles is usually 45 ⁇ m or less, preferably 20 to 0.1 ⁇ m, more preferably 50.5 ⁇ m.
- the amount of exchange of calcium ions and Z or magnesium ions in zeolite is preferably 60 mol% or more of the total exchangeable cations of zeolite on a sodium basis. That is, when sodium and calcium and / or magnesium are substituted as cations,
- the molar ratio is 60% or more. This molar ratio is preferably 70 95%, More preferably, it is 75-90%.
- the method of replacing the sodium type zeolite with the calcium type or magnesium type is to replace 1.0 to 2.0 times, preferably 1.0 to 1.5 times the amount of cation exchange of sodium type zeolite with calcium or Z or magnesium ions.
- the zeolite is impregnated in the aqueous solution to exchange sodium ions for calcium ions and / or magnesium ions.
- the water-soluble calcium salt in the present invention is one that dissolves in neutral water at 25 ° C in an amount of 1% by weight (10 g / L) or more.
- examples thereof include calcium salt calcium and calcium nitrate.
- calcium acetate Particularly preferred is calcium chloride.
- the water-soluble magnesium salt those soluble in neutral water at 25 ° C at 1% by weight or more (10 8 ) or more, such as magnesium salt, magnesium nitrate, and magnesium acetate are exemplified.
- magnesium chloride is particularly preferred.
- the concentration of the aqueous solution containing calcium ions and / or magnesium ions is usually 0.1 to 15% by weight, preferably 1 to 10% by weight.
- zeolite When the zeolite is brought into contact with an aqueous solution containing calcium ions and / or magnesium ions, an appropriate ratio that can be easily treated may be selected. Usually, 1 to 100 ml of calcium ion per 1 g of zeolite is used. It is preferable to use an aqueous solution containing magnesium ions.
- the time at which sodium ions of zeolite are replaced with calcium ions and / or magnesium ions may be before or after the zeolite is attached to the activated carbon surface.
- the impregnation of the solution containing zeolite with a calcium salt and / or a magnesium salt may be carried out with stirring or standing, but when it is carried out with stirring, the impregnation time is short. Normal stirring time
- the impregnation temperature may be 80 ° C.
- the impregnation time is short.
- the synthetic zeolite ion-exchanged with calcium ions and Z or magnesium ions may be washed as necessary. Washing is preferably performed using ion-exchanged water. After ion exchange with calcium ions and Z or magnesium ions, drain water by a known method, and if necessary, dry it.
- the raw material of the activated carbon used in the present invention includes wood, sawdust, charcoal, ash, fruit shells such as coconut shells and tall shells, fruit seeds such as peaches and plums, pulp manufacturing byproducts such as lignin waste liquid, and refined pulp.
- Sugar waste (bacus), plant raw materials such as waste sugar dense, peat, peat coal, lignite, lignite, bituminous coal, anthracite, coatas, coal tar, petroleum pitch and other mineral raw materials, acrylic resin, vinylidene chloride resin, Any commonly used materials such as synthetic resin-based materials such as phenolic resins or their carbides can be used. In particular, palm shells are preferred.
- the method of activating activated carbon is not particularly limited.
- activated carbon with activated gas such as steam, oxygen, and carbon dioxide, phosphoric acid, chloride, etc., manufactured by the method described in “Activated carbon industry”, Heavy Chemicals Industry News Agency (1974), p.
- Activated carbon other than activated with halogen gas, such as chemical activated carbon using dani zinc or the like, is used.
- BET specific surface area of the activated carbon used in the present invention is usually 500 2000 m 2 / g, rather preferably is 700 l 8 00m 2 / g.
- the particle size of the activated carbon is not particularly limited, but the average particle size is usually 0.075 to 5 mm, preferably 0.1 to 3 mm.
- the weight ratio of zeolite to activated carbon is usually 0.1 to 80 parts by weight, preferably 0.5 to 20 parts by weight, and more preferably 0.5 to 15 parts by weight, based on 100 parts by weight of activated carbon. , Most preferably 0.5-5 parts by weight.
- a binder that does not harm the human body, does not block the pores of the activated carbon, and can immobilize zeolite on the activated carbon surface by physical means such as heating is used.
- the binder has both organic and inorganic binders.
- Organic binders include latex resins such as polyurethane, polystyrene, polyvinylidene chloride, and polyvinyl acetate.
- Inorganic binders include water glass (sodium silicate). Silica alumina ceramics and the like can be mentioned. Among them, water glass is particularly preferred.
- the concentration of the binder solution used is usually 11 to 15% by weight, preferably 3 to 10% by weight.
- the binder is used in an amount of 0.5 to 25% by weight, preferably 1 to 15% by weight, based on the total weight of zeolite and activated carbon.
- the method of coating the activated carbon surface with zeolite is not particularly limited, and a known method is used. For example, immersing activated carbon in a solution containing zeolite powder and then drying (Impregnation method), a method of spraying a solution containing zeolite powder on the surface of activated carbon and drying (spraying method), or a method of drying by passing a solution containing zeolite powder while flowing activated carbon ( Flow method).
- Water glass and silica alumina are particularly preferable because they serve as a binder and have high affinity for zeolite.
- the binder may be one kind or a mixture of two or more kinds.
- Activated carbon and Z or zeolite may be impregnated with silver or a silver compound in order to impart antibacterial properties to the heavy metal ion adsorbent.
- the impregnation can be performed, for example, by adding an aqueous solution of a water-soluble silver conjugate such as colloidal silver or silver nitrate to zeolite and / or activated carbon before or after coating and drying.
- the amount of silver ions eluted into water can be suppressed by further impregnating a water-soluble alkaline earth metal salt.
- the antibacterial effect can be maintained for a long time.
- the alkaline earth metal salt magnesium nitrate, calcium nitrate, barium nitrate, magnesium sulfate and the like are preferred, and magnesium nitrate is more preferred.
- the attachment of the alkaline earth metal salt to the adsorbent can be carried out by adding a liquid containing the alkaline earth metal salt and silver or silver chloride to zeolite and / or activated carbon and drying the mixture. This operation may be performed by combining a solution containing silver or a silver compound with a solution of an alkaline earth metal salt. Alternatively, a solution containing silver or silver-containing compound and a solution of alkaline earth metal salt may be separately sprayed onto the adsorbent.
- the amount of silver or silver compound impregnated is 0.05 to 2.0% by weight, preferably 0.05 0.5% by weight, and most preferably 0.05 0.2% by weight in terms of silver, based on the total weight of zeolite and activated carbon.
- the amount of the water-soluble alkaline earth metal salt impregnated is 0.05 2.0% by weight, preferably 0.05 0.5% by weight, and most preferably 0.05 0.2% by weight in terms of alkaline earth metal, based on the total weight of zeolite and activated carbon. It is.
- the present invention is used as a filter medium for a water purifier.
- water is usually passed continuously after filling the container with the adsorbent.
- water can be poured into the portion filled with the adsorbent, and the water can be passed in a batch system.
- Non-woven fabric, hollow fiber membrane, ceramic filtration It may be used in combination with commonly used minerals such as membranes and other commonly used filter media, barley stone, coral sand, tourmaline and the like.
- the ion exchange resin may be used by mixing or laminating with a material having a normal ion exchange ability such as ion exchange resin, zeolite, apatite, sepiolite, and bone charcoal. Also, it may be used as a filter agent for water purification cartridges of alkali water purifiers.
- the use of the heavy metal adsorbent for water of the present invention efficiently removes heavy metals, residual chlorine, and trihalomethane particularly in tap water, and leaves minerals such as calcium to obtain delicious and healthy water. be able to.
- the heavy metal adsorbent of the present invention has a stable pH in the vicinity of neutral water after treatment, and has the following characteristics.
- This suspension was sprayed onto 100 g of raw material activated carbon while stirring, and the temperature was adjusted to 115 ° C ⁇ 5. After drying for 3 hours in a dryer kept at C, adsorbent No. 1 consisting of zeolite-coated activated carbon was obtained.
- Example 1 was repeated except that 4 g of zeolite was suspended in an aqueous solution of water glass (5 g of water glass / 70 ml of water). In the same manner, adsorbent No. 2 composed of zeolite-coated activated carbon was obtained.
- Adsorbent No. 3 consisting of zeolite-coated activated carbon was obtained in the same manner as in Example 1, except that 4 g of zeolite was suspended in an aqueous solution of water glass (10 g of water glass / 70 ml of water).
- Adsorbent No. 4 consisting of zeolite-coated activated carbon was obtained in the same manner as in Example 1 except that 10 g of zeolite was suspended in an aqueous solution of water glass (20 g of water glass / 70 ml of water).
- Adsorbent No. 5 consisting of zeolite-coated activated carbon was obtained in the same manner as in Example 1 except that zeolite lg was suspended in a water glass aqueous solution (water glass 2 g / water 70 ml).
- An adsorbent No. 6 comprising zeolite and activated carbon was obtained in the same manner as in Example 1, except that 70 ml of water was used instead of the aqueous solution of water glass.
- An adsorbent No. 7 consisting of water-glass-coated activated carbon was obtained in the same manner as in Example 1 except that the activated carbon was suspended in a water glass aqueous solution (water glass 2 g / 70 ml) without using zeolite.
- Example 6
- a synthetic 13X type zeolite (particle size: 1 ⁇ m), 90 g, was placed in a 500 ml beaker, and 360 ml of an aqueous calcium chloride solution (having calcium chloride dissolved therein so as to contain 8.0 g as calcium) was caloried. Of zeolite in which 85 mol% of the zeolites were replaced by calcium. Otherwise in the same manner as in Example 1, adsorbent No. 9 comprising zeolite-coated activated carbon was obtained. (Comparative Example 3)
- Adsorbent No. 10 consisting of zeolite-coated activated carbon was obtained in the same manner as in Example 1, except that the synthesized 13X zeolite was used without calcium exchange.
- Example 8 A synthetic 13X type zeolite (particle size: 1 ⁇ m) (90 g) was placed in a 500 ml beaker, and calcium chloride aqueous solution (360 ml) (calcium chloride was dissolved to contain 5.0 g as calcium) was added thereto. A zeolite powder having mol% replaced by calcium was obtained. Otherwise in the same manner as in Example 1, adsorbent No. ll composed of zeolite-coated activated carbon was obtained.
- Example 8 A synthetic 13X type zeolite (particle size: 1 ⁇ m) (90 g) was placed in a 500 ml beaker, and calcium chloride aqueous solution (360 ml) (calcium chloride was dissolved to contain 5.0 g as calcium) was added thereto. A zeolite powder having mol% replaced by calcium was obtained. Otherwise in the same manner as in Example 1, adsorbent No. ll composed of zeolite-coated activated carbon was obtained.
- Calcium-exchanged synthetic 13X type zeolite (particle size 1 ⁇ m, calcium substitution rate 75 mol%) was mixed with 2 g of a silver and alkaline earth metal-containing aqueous water glass solution (water glass 5 g, silver nitrate 0.157 g and magnesium nitrate 1.2 g / (70 ml of water) and mixed well to prepare a zeolite suspension. This suspension was sprayed at room temperature while mixing with 100 g of the raw material activated carbon, and then dried for 3 hours in a drier kept at 115 ° C and 5 ° C to obtain adsorbent No. consisting of zeolite-coated activated carbon. I got 13.
- zeolite of Example 10 2 g was added to an aqueous water glass solution containing silver and an alkaline earth metal (5 g of water glass, 0.157 g of silver nitrate and 1.2 g of magnesium nitrate dissolved in 70 ml of water), and mixed well. A zeolite suspension was prepared. This suspension was sprayed at room temperature while being mixed with 100 g of activated carbon, and then dried for 3 hours in a drier maintained at 115 ° C ⁇ 5 ° C, and adsorbent No. 16 consisting of zeolite-coated activated carbon was used. Got.
- Examples 1-5 (Adsorbent No. l5), Examples 8-12 (Adsorbent No. 12 16), Comparative Examples 1 and 2 (Adsorbent Nos. 6 and 7)
- the lead removal performance was measured by the following method.
- a water purifier cartridge with an inner volume of 120 ml was filled with the adsorbent, and a water flow test was performed according to the method according to JIS S3201.
- Removal rate (%) ⁇ (inlet concentration)-(outlet concentration) / (inlet concentration) ⁇ X 100
- Example 15 (Adsorbent No. l-5), Example 8-12 (Adsorbent No. 12-16), Comparative Examples 1 and 2 (Adsorbent No. 6) in a water purifier cartridge with an inner volume of 120 ml. And the adsorbent obtained in 7) was filled, and a water flow test was performed according to the method according to JIS S3201. That is, at a temperature of 20 ° C, Water (total trihalomethane concentration lOOppb) prepared in Norem 45ppb, bromodichloromethane 30ppb, dichloromethane chloride 20ppb, bromoform 5ppb,
- Removal rate (%) ⁇ (inlet concentration)-1 (outlet concentration) / (inlet concentration) ⁇ ⁇ ⁇ 00
- a water purifier cartridge with an inner volume of 120 ml is filled with an adsorbent, and the calcium concentration of the treated water when passing through SVzgOOhr- 1 according to the method of JIS S3201 is measured with an atomic absorption spectrophotometer to determine the calcium reduction rate. It was measured. At this time, the calcium concentration in the inlet water was 13.5 mg / L.
- Example 1 (Adsorbent No. 1), Example 6 (Adsorbent No. 8) and Example 7 (Adsorbent No. 9), the calcium reduction rate was low and promptly from the beginning of water passage. While the decrease rate approaches 0 In Comparative Example 3 (adsorbent No. 10), the calcium exchange rate of zeolite was not changed, so that the calcium reduction rate during the treatment from the initial stage of water passage was considerably high. In Comparative Example 4 (adsorbent No. 11), the calcium exchange rate of zeolite was insufficient, so that the calcium reduction rate was not so low.
- the amount of silver eluted from each of the adsorbents obtained in Examples 1, 8, 10, and 12 was measured by the following method.
- desiccator desiccant: silica gel
- an adsorbent capable of eluting silver could be prepared.
- the silver- and magnesium-impregnated adsorbent prepared from the silver-containing aqueous solution containing magnesium nitrate eluted silver stably over a long period of time.
- the use of the heavy metal adsorbent in water of the present invention effectively removes heavy metals, residual chlorine, and trihalomethane, and leaves minerals such as calcium to obtain delicious and healthy water.
- the water after treatment has a stable pH around neutrality and has the characteristics of being stable, making it an adsorbent for tap water and water purification plants. Useful.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010527287A (ja) * | 2007-05-16 | 2010-08-12 | エクソンモービル リサーチ アンド エンジニアリング カンパニー | 廃水の水銀除去方法 |
CN108083409A (zh) * | 2017-12-27 | 2018-05-29 | 盐城工学院 | 一种废水处理剂及其制备方法 |
RU2686228C1 (ru) * | 2018-02-01 | 2019-04-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" | Способ очистки сточных вод от ионов металлов |
CN112138627A (zh) * | 2019-06-26 | 2020-12-29 | 李金有 | 一种用于盐碱地改良的载钙盐离子吸附剂 |
CN113842899A (zh) * | 2021-11-12 | 2021-12-28 | 西南科技大学 | 一种利用紫荆果壳制备去除废水中重金属吸附剂的方法 |
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2004
- 2004-07-21 WO PCT/JP2004/010336 patent/WO2005009610A1/ja active Application Filing
- 2004-07-21 JP JP2005512014A patent/JPWO2005009610A1/ja active Pending
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JPS59193134A (ja) * | 1983-04-18 | 1984-11-01 | Takeda Chem Ind Ltd | 浄水用材 |
JPH03229690A (ja) * | 1990-02-01 | 1991-10-11 | Nishi Nippon Sangyo Kk | 天然ゼオライトを用いた浄水器用浄化剤 |
JPH0623265A (ja) * | 1992-04-09 | 1994-02-01 | Takeda Chem Ind Ltd | 浄水用材、その製造方法及び浄水方法 |
JPH07148487A (ja) * | 1993-11-30 | 1995-06-13 | Nishi Nippon Sangyo Kk | 天然ゼオライトを原料とした水質改良剤の製造方法 |
JPH0999284A (ja) * | 1995-10-05 | 1997-04-15 | Mitsubishi Rayon Co Ltd | 浄水器 |
JPH10277541A (ja) * | 1997-04-07 | 1998-10-20 | Ashiya Bussan:Kk | ゼオライト系水質浄化剤 |
JP2002273417A (ja) * | 2001-03-23 | 2002-09-24 | Osaka Gas Chem Kk | 水処理用フィルター |
JP2004000912A (ja) * | 2002-03-22 | 2004-01-08 | Takeda Chem Ind Ltd | 水中重金属除去剤 |
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JP2010527287A (ja) * | 2007-05-16 | 2010-08-12 | エクソンモービル リサーチ アンド エンジニアリング カンパニー | 廃水の水銀除去方法 |
CN108083409A (zh) * | 2017-12-27 | 2018-05-29 | 盐城工学院 | 一种废水处理剂及其制备方法 |
RU2686228C1 (ru) * | 2018-02-01 | 2019-04-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" | Способ очистки сточных вод от ионов металлов |
CN112138627A (zh) * | 2019-06-26 | 2020-12-29 | 李金有 | 一种用于盐碱地改良的载钙盐离子吸附剂 |
CN113842899A (zh) * | 2021-11-12 | 2021-12-28 | 西南科技大学 | 一种利用紫荆果壳制备去除废水中重金属吸附剂的方法 |
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