CN107338272A - A kind of recycling processing method of arsenic-containing waste residue - Google Patents
A kind of recycling processing method of arsenic-containing waste residue Download PDFInfo
- Publication number
- CN107338272A CN107338272A CN201710462628.7A CN201710462628A CN107338272A CN 107338272 A CN107338272 A CN 107338272A CN 201710462628 A CN201710462628 A CN 201710462628A CN 107338272 A CN107338272 A CN 107338272A
- Authority
- CN
- China
- Prior art keywords
- arsenic
- waste residue
- containing waste
- processing method
- recycling processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P3/00—Preparation of elements or inorganic compounds except carbon dioxide
Abstract
The present invention relates to a kind of recycling processing method of arsenic-containing waste residue, belongs to arsenic slag Treatment process field.The present invention is fermented after mixing arsenic-containing waste residue and lichens,Arsenic in the organic acid and waste residue of lichens secretion reacts to obtain arsenic acid,Then mixed with sodium acid carbonate,Bicarbonate radical can suppress suction-operated of the waste residue to arsenic acid,Centrifuge again,Obtain upper liquid and sediment,Evaporate the volatile substances containing arsenic sediment heating,Obtain arsenical fume,Arsenical fume is leached,Again by leachate,Upper liquid and iron chloride etc. are reacted,The arsenic that iron ion is hydrolyzed to form in ferric hydroxide colloid adsorbent solution forms flocculent deposit,Re-dry,Wherein arsenic acid is dehydrated to form diarsenic pentoxide,And iron hydroxide is dehydrated to obtain iron oxide,The mixture of diarsenic pentoxide and iron oxide is dissolved again,Obtain diarsenic pentoxide solution,It is spray-dried again,Diarsenic pentoxide can be obtained,The present invention can be reclaimed effectively to the arsenic in waste residue in the form of diarsenic pentoxide.
Description
Technical field
The present invention relates to a kind of recycling processing method of arsenic-containing waste residue, belongs to arsenic slag Treatment process field.
Background technology
With industrialization and modernization beginning, the continuous expansion of commercial production scale, the extensive use of arsenic with containing
The unordered stacking disposal of arsenic waste residue result in substantial amounts of soil arsenic pollution.Currently, arsenic pollution turns into a serious environmental problems.
Arsenic pollution is mainly derived from exploitation or smelting process discarded object and its industrial residue of arsenic manufacturing enterprise containing arsenic minerals.Arsenic pollution
In China, not only scope is wide, and pollution level is deep and harm is serious, arsenic pollution administer into current environment administer when business
Anxious, its Treatment process turns into one of environmental science focus of attention problem.Arsenic in arsenic-containing waste residue is in certain condition
Lower that physics, chemical or biological conversion can occur, diffusion mobility is to surface water, soil and underground under environmental factor driving
Environment and health are endangered by food chain approach after water.Arsenic is production arsenic（As2O3）Important composition composition, severe toxicity.Arsenic
It can be combined with the enzyme containing sulfydryl in cell, suppress cellular oxidation process, paralysis vasomotor center, made capillary paralysis, expand
And permeability increase, Long Term Contact arsenide can cause cutaneum carcinoma and lung cancer, and severe may occur in which shock, liver damage, or even extremely
In Poisoning cardiac damage.
Arsenic pollution Treatment process is as one of emphasis of research of current environment recovery technique.It is although right both at home and abroad at present
It is more but less compared with the practical technique for successfully having been commercialized running in the related research of arsenic pollution Treatment process.For soil
The more Soil leaching technology of pollution current research can effectively remove arsenic in arsenic removal slag, and repairing efficiency is short, but as elution is carried out,
Elution efficiency constantly reduces, and waste residue arsenic content still can not reach safety requirements after elution, and elutes processing cost height, leacheate
Deal with improperly and be also easy to produce secondary pollution.Phytoremediation technology can safely and effectively go arsenic pollution in arsenic removal slag, technology maturation peace
Quan Xinggao, rehabilitation cost are low, but the technology remediation efficiency is low, and cycle length is difficult to meet engineer applied requirement.Therefore, one kind is needed badly
The new method for safely and effectively handling arsenic-containing waste residue.
The content of the invention
The technical problems to be solved by the invention：Arsenic is gone in arsenic removal slag elution efficiency to be present for current elution technique continuous
Reducing, arsenic content still can not reach safety requirements in waste residue after elution, and the defects of be also easy to produce secondary pollution, there is provided it is a kind of
The recycling processing method of arsenic-containing waste residue.
In order to solve the above technical problems, the present invention is using technical scheme as described below：
（1）After 3~5kg arsenic-containing waste residues and 1~2kg lichens ball millings, mixture is obtained, by sodium thiosulfate, mixture and water
After being mixed in fermentation tank, fermentation substrate is obtained, it is 105cfu/mL dissimilatory iron reduction bacterium bacteria suspensions to add concentration, sealing hair
Ferment 12~15 days, treats fermentation ends, by tunning high-temperature sterilization, obtains the material that sterilizes, by sterilizing material and 40~50g carbonic acid
Hydrogen sodium centrifuges after being stirred 1~2h, respectively obtains sediment and upper liquid；
（2）Put the precipitate in rotary kiln, calcine 5~6h at 700~800 DEG C, make volatile matter therein in a gaseous form
Volatilization, is then reclaimed with cloth bag, obtains arsenical fume, arsenical fume plus water logging are gone out, obtain leachate after cooling；
（3）By leachate, upper liquid, 1~2L mass fractions be 25% ferric chloride solution and 100~120mL mass fractions are 25%
After 40~50min of hydrogen peroxide stirring reaction, it is 4.5~4.8 to add pH adjusting agent regulation pH, continuation stirring reaction 60~
90min, question response filter after terminating, and obtain filter residue, filter residue is placed in tube furnace, under nitrogen guard mode, in 160~
180 DEG C of 6~7h of Heat preservation, obtain product, are filtered after product is mixed into 30~40min with 2~3L water, obtain filtrate, will filter
Liquid is spray-dried, and obtains diarsenic pentoxide.
Step（1）Described in sodium thiosulfate, the mass ratio of mixture and water be 1:10:50.
Step（1）Described in dissimilatory iron reduction bacterium bacteria suspension addition be fermentation substrate quality 8%.
Step（1）Described in fermentation temperature be 35~45 DEG C.
Step（2）Described in the dosage of water be 2~3L.
Step（2）Described in leaching when temperature be 60~70 DEG C, extraction time is 5~6h.
Step（3）Described in pH adjusting agent be that mass fraction is 15% hydrochloric acid.
Compared with other method, advantageous effects are the present invention：
The present invention is fermented after first mixing arsenic-containing waste residue and lichens, organic acid caused by lichens secretion and the arsenic in waste residue
Reaction obtains arsenic acid, is then mixed with sodium acid carbonate, and sodium acid carbonate can promote absorption of the arsenic acid dissolution inhibition waste residue to arsenic acid to make
With, then centrifuge, upper liquid and sediment are obtained, volatilizes the volatile substances therein containing arsenic sediment heating
Come, obtain arsenical fume, arsenical fume is leached, then leachate and hydrogen peroxide, iron chloride are reacted, under certain acid-base value,
Iron ion hydrolyzes to form ferric hydroxide colloid, and the arsenic in the adsorbable solution of colloid forms flocculent deposit, then by flocculent deposit
It is dried, wherein arsenic acid dehydration can form diarsenic pentoxide, and iron hydroxide is dehydrated to obtain iron oxide, then by diarsenic pentoxide
Filtered after being mixed with the mixture of iron oxide with water, obtain diarsenic pentoxide solution, then it is spray-dried, you can obtain five oxidations two
Arsenic, the present invention can be reclaimed effectively to the arsenic in waste residue in the form of diarsenic pentoxide.
Embodiment
3~5kg arsenic-containing waste residues are weighed first and 1~2kg lichens is added to 40~50min of ball milling in ball mill, are mixed
Compound, by sodium thiosulfate, mixture and water in mass ratio 1:10:50 are added in fermentation tank, are stirred 3~5min, obtain
To fermentation substrate, then the concentration of addition fermentation substrate quality 8% is 10 into fermentation tank5Cfu/mL dissimilatory iron reduction bacterium bacteria suspensions,
35~45 DEG C be sealed by fermentation 12~15 days, treat fermentation ends, tunning be placed in high-temperature sterilization box, in temperature be 125
15~20min of high-temperature sterilization under the conditions of~135 DEG C, the material that sterilizes is obtained, 40~50g sodium acid carbonates is added into sterilizing material,
Poured into after being stirred 1~2h in centrifuge, 10~15min is centrifuged with 4000~5000r/min rotating speed, respectively obtained
Sediment and upper liquid, put the precipitate in rotary kiln, 700~800 DEG C calcine 5~6h, make volatile matter therein with
Gaseous form is volatilized, and is then reclaimed after cooling with cloth bag, obtains arsenical fume, arsenical fume plus 2~3L water loggings are gone out,
It is 60~70 DEG C to control extraction temperature, and extraction time is 5~6h, obtains leachate, after leachate and upper liquid are mixed, is obtained
Mixed liquor, into mixed liquor, addition 1~2L mass fractions are 25% ferric chloride solution and 100~120mL mass fractions are 25% pair
Oxygen water, after 40~50min of stirring reaction, it is that 15% salt acid for adjusting pH is 4.5~4.8 to add mass fraction, continues stirring reaction
60~90min, after question response terminates, reaction product is filtered, obtains filter residue, filter residue is placed in tube furnace, and to tube furnace
In be passed through nitrogen, it is 10~15mL/min to control nitrogen to be passed through speed, under nitrogen guard mode, is incubated at 160~180 DEG C
6~7h is heated, product is obtained, product is added in the beaker for filling 2~3L water, filters, obtain after being stirred 30~40min
To filtrate and it is spray-dried, obtains dried object, i.e. diarsenic pentoxide.
Example 1
5kg arsenic-containing waste residues are weighed first and 2kg lichens is added to ball milling 50min in ball mill, mixture are obtained, by thiosulfuric acid
Sodium, mixture and water in mass ratio 1:10:50 are added in fermentation tank, are stirred 5min, obtain fermentation substrate, then to fermentation
The concentration that fermentation substrate quality 8% is added in tank is 105Cfu/mL dissimilatory iron reduction bacterium bacteria suspensions, it is sealed by fermentation 15 days at 45 DEG C,
Fermentation ends are treated, tunning is placed in high-temperature sterilization box, high-temperature sterilization 20min under the conditions of being 135 DEG C in temperature, are gone out
Fungus material, 50g sodium acid carbonates are added into sterilizing material, are poured into after being stirred 2h in centrifuge, with 5000r/min rotating speed
15min is centrifuged, sediment and upper liquid is respectively obtained, puts the precipitate in rotary kiln, 6h is calcined at 800 DEG C, makes it
In volatile matter volatilize in a gaseous form, then reclaimed after cooling with cloth bag, obtain arsenical fume, by arsenical fume
3L water loggings are added to go out, it is 70 DEG C to control extraction temperature, extraction time 6h, obtains leachate, after leachate and upper liquid are mixed,
Mixed liquor is obtained, into mixed liquor, addition 2L mass fractions are 25% ferric chloride solution and 120mL mass fractions are 25% hydrogen peroxide,
After stirring reaction 50min, it is that 15% salt acid for adjusting pH is 4.8 to add mass fraction, continues stirring reaction 90min, question response knot
Shu Hou, reaction product is filtered, obtain filter residue, filter residue is placed in tube furnace, and nitrogen is passed through into tube furnace, control nitrogen
It is 15mL/min to be passed through speed, and under nitrogen guard mode, Heat preservation 7h, obtains product at 180 DEG C, and product is added to
In the beaker for filling 3L water, filtered after being stirred 40min, obtain filtrate and be spray-dried, obtain dried object, i.e., five oxidations two
Arsenic.
Example 2
3kg arsenic-containing waste residues are weighed first and 1kg lichens is added to ball milling 40min in ball mill, mixture are obtained, by thiosulfuric acid
Sodium, mixture and water in mass ratio 1:10:50 are added in fermentation tank, are stirred 3min, obtain fermentation substrate, then to fermentation
The concentration that fermentation substrate quality 8% is added in tank is 105Cfu/mL dissimilatory iron reduction bacterium bacteria suspensions, it is sealed by fermentation 12 days at 35 DEG C,
Fermentation ends are treated, tunning is placed in high-temperature sterilization box, high-temperature sterilization 15min under the conditions of being 125 DEG C in temperature, are gone out
Fungus material, 40g sodium acid carbonates are added into sterilizing material, are poured into after being stirred 1h in centrifuge, with 4000r/min rotating speed
10min is centrifuged, sediment and upper liquid is respectively obtained, puts the precipitate in rotary kiln, 5h is calcined at 700 DEG C, makes it
In volatile matter volatilize in a gaseous form, then reclaimed after cooling with cloth bag, obtain arsenical fume, by arsenical fume
2L water loggings are added to go out, it is 60 DEG C to control extraction temperature, extraction time 5h, obtains leachate, after leachate and upper liquid are mixed,
Mixed liquor is obtained, into mixed liquor, addition 1L mass fractions are 25% ferric chloride solution and 100mL mass fractions are 25% hydrogen peroxide,
After stirring reaction 40min, it is that 15% salt acid for adjusting pH is 4.5 to add mass fraction, continues stirring reaction 60min, question response knot
Shu Hou, reaction product is filtered, obtain filter residue, filter residue is placed in tube furnace, and nitrogen is passed through into tube furnace, control nitrogen
It is 10mL/min to be passed through speed, and under nitrogen guard mode, Heat preservation 6h, obtains product at 160 DEG C, and product is added to
In the beaker for filling 2L water, filtered after being stirred 30min, obtain filtrate and be spray-dried, obtain dried object, i.e., five oxidations two
Arsenic.
Example 3
4kg arsenic-containing waste residues are weighed first and 1kg lichens is added to ball milling 45min in ball mill, mixture are obtained, by thiosulfuric acid
Sodium, mixture and water in mass ratio 1:10:50 are added in fermentation tank, are stirred 4min, obtain fermentation substrate, then to fermentation
The concentration that fermentation substrate quality 8% is added in tank is 105Cfu/mL dissimilatory iron reduction bacterium bacteria suspensions, it is sealed by fermentation 13 days at 40 DEG C,
Fermentation ends are treated, tunning is placed in high-temperature sterilization box, high-temperature sterilization 17min under the conditions of being 130 DEG C in temperature, are gone out
Fungus material, 45g sodium acid carbonates are added into sterilizing material, are poured into after being stirred 2h in centrifuge, with 4500r/min rotating speed
12min is centrifuged, sediment and upper liquid is respectively obtained, puts the precipitate in rotary kiln, 6h is calcined at 750 DEG C, makes it
In volatile matter volatilize in a gaseous form, then reclaimed after cooling with cloth bag, obtain arsenical fume, by arsenical fume
2L water loggings are added to go out, it is 65 DEG C to control extraction temperature, extraction time 5h, obtains leachate, after leachate and upper liquid are mixed,
Mixed liquor is obtained, into mixed liquor, addition 2L mass fractions are 25% ferric chloride solution and 110mL mass fractions are 25% hydrogen peroxide,
After stirring reaction 45min, it is that 15% salt acid for adjusting pH is 4.7 to add mass fraction, continues stirring reaction 80min, question response knot
Shu Hou, reaction product is filtered, obtain filter residue, filter residue is placed in tube furnace, and nitrogen is passed through into tube furnace, control nitrogen
It is 12mL/min to be passed through speed, and under nitrogen guard mode, Heat preservation 6h, obtains product at 170 DEG C, and product is added to
In the beaker for filling 2L water, filtered after being stirred 35min, obtain filtrate and be spray-dried, obtain dried object, i.e., five oxidations two
Arsenic.
Reference examples：Arsenic-containing waste residue is recycled using elution method recovery.
Diarsenic pentoxide after example 1 to example 3 and reference examples recovery is detected, testing result such as table 1.
Table 1
| Example 1 | Example 2 | Example 3 | Reference examples | |
| The rate of recovery (%) of arsenic | 97.2 | 98.5 | 99.2 | 70.1 |
| Diarsenic pentoxide (%) | 99.5 | 99.6 | 99.7 | 89.2 |
As shown in Table 1, the rate of recovery of arsenic and purity are higher in recycling technology of the invention.
Claims (7)
1. a kind of recycling processing method of arsenic-containing waste residue, it is characterised in that specifically preparation process is：
（1）After 3~5kg arsenic-containing waste residues and 1~2kg lichens ball millings, mixture is obtained, by sodium thiosulfate, mixture and water
After being mixed in fermentation tank, fermentation substrate is obtained, adds concentration as 105Cfu/mL dissimilatory iron reduction bacterium bacteria suspensions, sealing hair
Ferment 12~15 days, treats fermentation ends, by tunning high-temperature sterilization, obtains the material that sterilizes, by sterilizing material and 40~50g carbonic acid
Hydrogen sodium centrifuges after being stirred 1~2h, respectively obtains sediment and upper liquid；
（2）Put the precipitate in rotary kiln, calcine 5~6h at 700~800 DEG C, make volatile matter therein in a gaseous form
Volatilization, is then reclaimed with cloth bag, obtains arsenical fume, arsenical fume plus water logging are gone out, obtain leachate after cooling；
（3）By leachate, upper liquid, 1~2L mass fractions be 25% ferric chloride solution and 100~120mL mass fractions are 25%
After 40~50min of hydrogen peroxide stirring reaction, it is 4.5~4.8 to add pH adjusting agent regulation pH, continuation stirring reaction 60~
90min, question response filter after terminating, and obtain filter residue, filter residue is placed in tube furnace, under nitrogen guard mode, in 160~
180 DEG C of 6~7h of Heat preservation, obtain product, are filtered after product is mixed into 30~40min with 2~3L water, obtain filtrate, will filter
Liquid is spray-dried, and obtains diarsenic pentoxide.
2. according to a kind of recycling processing method of arsenic-containing waste residue described in claim 1, it is characterised in that step（1）In
The mass ratio of described sodium thiosulfate, mixture and water is 1:10:50.
3. according to a kind of recycling processing method of arsenic-containing waste residue described in claim 1, it is characterised in that step（1）In
The addition of described dissimilatory iron reduction bacterium bacteria suspension is the 8% of fermentation substrate quality.
4. according to a kind of recycling processing method of arsenic-containing waste residue described in claim 1, it is characterised in that step（1）In
The temperature of described fermentation is 35~45 DEG C.
5. according to a kind of recycling processing method of arsenic-containing waste residue described in claim 1, it is characterised in that step（2）In
The dosage of described water is 2~3L.
6. according to a kind of recycling processing method of arsenic-containing waste residue described in claim 1, it is characterised in that step（2）In
Temperature is 60~70 DEG C during described leaching, and extraction time is 5~6h.
7. according to a kind of recycling processing method of arsenic-containing waste residue described in claim 1, it is characterised in that step（3）In
Described pH adjusting agent is that mass fraction is 15% hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710462628.7A CN107338272B (en) | 2017-06-17 | 2017-06-17 | Resource treatment method of arsenic-containing waste residue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710462628.7A CN107338272B (en) | 2017-06-17 | 2017-06-17 | Resource treatment method of arsenic-containing waste residue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107338272A true CN107338272A (en) | 2017-11-10 |
| CN107338272B CN107338272B (en) | 2021-03-09 |
Family
ID=60221614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710462628.7A Active CN107338272B (en) | 2017-06-17 | 2017-06-17 | Resource treatment method of arsenic-containing waste residue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107338272B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB372189A (en) * | 1930-09-09 | 1932-05-05 | Norddeutsche Affinerie | Process for the recovery of arsenic from arseniferous metallurgical intermediate products and by-products |
| CN101954370A (en) * | 2010-09-06 | 2011-01-26 | 同济大学 | Method for recycling arsenic-containing waste residues |
| CN102139919A (en) * | 2011-02-21 | 2011-08-03 | 湖南辰州矿业股份有限公司 | Method for reducing arsenic and lead in production of antimonous oxide by wet process |
| CN105540973A (en) * | 2015-12-28 | 2016-05-04 | 中南大学 | Method for purifying and recycling high arsenic polluted acid wastewater |
| CN106834707A (en) * | 2016-12-21 | 2017-06-13 | 中南大学 | A kind of method of arsenic-containing material synthetical recovery and arsenic recycling |
-
2017
- 2017-06-17 CN CN201710462628.7A patent/CN107338272B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB372189A (en) * | 1930-09-09 | 1932-05-05 | Norddeutsche Affinerie | Process for the recovery of arsenic from arseniferous metallurgical intermediate products and by-products |
| CN101954370A (en) * | 2010-09-06 | 2011-01-26 | 同济大学 | Method for recycling arsenic-containing waste residues |
| CN102139919A (en) * | 2011-02-21 | 2011-08-03 | 湖南辰州矿业股份有限公司 | Method for reducing arsenic and lead in production of antimonous oxide by wet process |
| CN105540973A (en) * | 2015-12-28 | 2016-05-04 | 中南大学 | Method for purifying and recycling high arsenic polluted acid wastewater |
| CN106834707A (en) * | 2016-12-21 | 2017-06-13 | 中南大学 | A kind of method of arsenic-containing material synthetical recovery and arsenic recycling |
Non-Patent Citations (3)
| Title |
|---|
| SINGH 等: "Adsorption technique for the treatment of As(V)-rich effluents", 《COLLOIDS AND SURFACES A: PHYSICOCHEMICAL AND ENGINEERING ASPECTS》 * |
| 司友斌 等: "异化铁还原对土壤中重金属形态转化及其有效性影响", 《环境科学》 * |
| 聂静: "有色金属冶炼生产中含砷废水和废渣的治理研究", 《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技I辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107338272B (en) | 2021-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103418608B (en) | A kind of method of microbial-chemical method combine d bioremediation heavy metal polluted soil in mine field | |
| CN104692515A (en) | Method for removing chloro-olefin in water through strengthening activating calcium peroxide | |
| CN106861654A (en) | The immobilization particle and its preparation and application of a kind of same for treating acidic mine wastewater | |
| CN108002472A (en) | A kind of preparation method of domestic sewage treating compound | |
| CN105016573B (en) | Method for treatment of dye and PVA containing neutral wastewater by UV collaborated complexing/Fenton system | |
| CN110885108B (en) | Efficient harmless treatment method for mine copper cyanide wastewater | |
| CN110964536B (en) | Iron-based soil remediation agent and preparation method thereof | |
| CN107879415A (en) | A kind of domestic sewage treating compound | |
| CN107350271A (en) | A kind of method of arsenic-containing waste residue stabilization processes | |
| CN104525173A (en) | Preparation method for environment-friendly advanced water treatment agent by combining carbon nano tube and TiO2 | |
| CN107758705A (en) | Zinnwaldite extracts lithium carbonate technique | |
| CN104386662B (en) | A kind of method utilizing phosphatization waste residue to produce tricalcium phosphate co-production ferric oxide | |
| CN107338272A (en) | A kind of recycling processing method of arsenic-containing waste residue | |
| CN104525227A (en) | Preparation method for environment-friendly advanced water treatment agent by combining carbon nano tube and Ag/BiOX | |
| CN114452936B (en) | Preparation method and application of Fenton sludge-based magnetic adsorbent | |
| CN107119188B (en) | A method of manganese in manganese oxide ore is extracted based on molten release of nitrococcus reduction-diluted acid | |
| CN105688865B (en) | It is a kind of by biological adsorption agent and its preparation method and application made from tea grounds ball milling post-modification | |
| CN104017993A (en) | Method for preparing vanadium oxide by using sodium salt roasting lixivium of titanium tetrachloride refined tailings | |
| CN104528716A (en) | Hydrochloric acid steel pickling waste liquor resource application technology | |
| CN107442141B (en) | A kind of solid super-strong acid is for being catalyzed hydrogen peroxide/ozone purposes and method | |
| CN113233477A (en) | Method for recovering industrial-grade sodium chloride by using industrial waste salt | |
| CN107162215A (en) | A kind of biochemical process for handling arsenic-containing waste water | |
| CN114702098A (en) | Heavy metal wastewater treating agent and wastewater treatment method | |
| CN112624726A (en) | Liquid mixed chelating agent for hazardous waste landfill standard and preparation method thereof | |
| CN105217900A (en) | A kind for the treatment of process of Pb-Zn deposits beneficiation wastewater |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200811 Address after: 421500 Puli Villagers Group No. 3, Pailou Village, Pengtang Township, Changning City, Hengyang City, Hunan Province Applicant after: Lei Jiangrong Address before: 213102 No. 32 Labor West Road, Tianning District, Changzhou City, Jiangsu Province Applicant before: CHANGZHOU JIEXUAN TEXTILE TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210204 Address after: 318015 No.2, Yuelong East Road, Hongjia street, Jiaojiang District, Taizhou City, Zhejiang Province Applicant after: Ruan Bingxu Address before: No. 3, Puli village group, pailou village, Pengtang Township, Changning City, Hengyang City, Hunan Province Applicant before: Lei Jiangrong |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |