CN105536712B - Jute polysaccharide and its application made from steam explosion method - Google Patents
Jute polysaccharide and its application made from steam explosion method Download PDFInfo
- Publication number
- CN105536712B CN105536712B CN201510945761.9A CN201510945761A CN105536712B CN 105536712 B CN105536712 B CN 105536712B CN 201510945761 A CN201510945761 A CN 201510945761A CN 105536712 B CN105536712 B CN 105536712B
- Authority
- CN
- China
- Prior art keywords
- jute
- polysaccharide
- preparation
- blade
- tender tip
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- 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
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- 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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
-
- 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
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention belongs to solid absorbent and preparation method thereof, and in particular to a kind of using jute polysaccharide as sorbing material of main component and preparation method thereof.Jute blade and tender tip have the excellent performance for removing Cr VI in water body, are OH and NH in these polysaccharide because these histocytes are rich in polysaccharose substances such as pectin2Typical basic group Deng group, this special construction cause they to the metal ion with certain ionic radius under the conditions of certain pH value with chelation, be a kind of natural metal-chelator.The blade of the invention for using corchorus olitorius and tender tip are separated the polysaccharose substances such as wherein abundant pectin using physics and chemical means, gained material advantages of good adsorption effect as raw material, it is simple to operate, cost is low, easily realizes commercialization, the added value of this traditional fibre crop of increase jute.
Description
Technical field
The invention belongs to field of sewage treatment containing heavy metal ion, and in particular to one kind is using jute extract as sorbing material
The method for removing hexavalent chromium in water removal.
Background technology
After finding metallic element chromium from 18 end of the centurys, chromium and compound is widely applied in the industrial production,
As the raw material that the industries such as metallurgy, intermetallic composite coating, plating, process hides, paint, printing and dyeing, pharmacy, photomechanical production are essential, thus
Produce substantial amounts of chromate waste water.Chromium mainly exists in nature in the form of Cr (III) and Cr (VI), and Cr (III) is a kind of people
It is micro- necessary to body, and water-solubility Cr (VI) is then listed in one of 8 kinds of maximum chemical substances of harm to the human body, for the world
One of 3 kinds of generally acknowledged carcinogenic metal objects, while be also one of 129 kinds of generally acknowledged priority pollutants of U.S. EPA, containing Cr (VI) waste water
It must can be discharged through processing is up to standard.
Jute is Tiliaceae (Tiliaceae) Corchorus (Corchorus) annual herb plant, for a long time jute master
It is used as natural fiber raw material, Recent study shows, long fruit jute has to the heavy metal such as Cr (VI), Cd, Pb, Ni, Cu
Very strong absorption property, jute complete stool are used equally for adsorbing heavy metal, and Jiang Ping discloses one kind using a tossa absorption huge sum of money
Belong to the water treatment facilities (patent publication No. CN203513320U) of lead, Zheng Tong has invented a kind of microwave and has quickly been modified jute preparation weight
The method (patent publication No. CN104562632A) of metal ion exchanged fiber, inventor are directed to the anionic group of Cr (VI)
Absorption research, find roundpod jute leaf and tender tip for stalk for Cr (VI) have stronger adsorption capacity (《Jute inhales
The special germplasm screening of attached heavy metal Cr (VI)》, warm haze etc.), meanwhile, inventor also inhales with regard to jute to Cr in solution (VI) biology
Random reason is studied, the results showed that roundpod jute leaf (crushed after being dried) is to Cr (VI) maximal absorptive capacity up to 185.09mg/
G, adsorption dynamics adsorption kinetics meet plan second-order kinetic equation, and adsorption isotherm meets Langmuir models.
Why jute blade and tender tip have the more excellent performance for removing Cr VI in water body, are because these tissues
Cell is rich in the polysaccharose substance such as pectin ,-OH and-NH in these polysaccharide2It is typical basic group Deng group, from conformation
From the point of view of, all it is equatorial bond, this special construction causes them to the metal ion with certain ionic radius in certain pH value
Under the conditions of there is chelation, be a kind of natural metal-chelator.
Cr VI in water body is removed as sorbing material using jute blade and tender tip, had cheap, efficient, simple to operate
Etc. outstanding feature, but jute blade and tender tip are not easy storage and transport, and added value is low, are not easy to promote, and the present invention provides
One kind effective component extracting --- method of jute polysaccharide from jute blade and tender tip, can be achieved twice laid, increase jute
Added value, while provide a kind of new material for the sewage disposal containing Cr (VI).
The content of the invention
The blade of the invention for using corchorus olitorius and tender tip are as raw material, by polysaccharose substances such as wherein abundant pectin
To be separated using physics and chemical means, gained material advantages of good adsorption effect, simple to operate, cost is low, easily realizes commercialization,
Increase the added value of this traditional fibre crop of jute.
The present invention includes herein below：
First, the method that jute polysaccharide is extracted using fresh jute blade and tender tip as raw material, step are as follows：
(1) raw material prepares：Long fruit jute harvests blade and tender tip before blooming, the tender tip is below plant stem top
15cm or so stem-tip tissue, flesh tissue is cleaned, and beater smashes slurrying；
(2) pre-process：The acid solution of concentration 5% is added into slurries made from step (1), addition is material quality
10-15%, stir 30-60min under normal temperature；
(3) steam blasting：Burst pressure is 1.5MPa, and the dimension pressure time is 3-12min；
(4) separating and filtering：Filtered through gauze or quartz sand filter, and collect explosion slag；
(5) processing of steam explosion slag：Extract steam explosion slag, extraction time 1-2h, filtering at ambient temperature using acid solution
Obtain leaching liquor；
(6) precipitation is collected：The saturation hexadecyl of 1-5% volumes is added in the leaching liquor obtained into step (5)
Pyridine, precipitation is collected, is precipitated as the jute polysaccharide slightly extracted；
(7) purify：Thick extraction thing in step (6) is separated with high pressure liquid chromatography, purifies that to obtain molecular weight be 500-
The jute polysaccharide of 20000 dalton.
Preferably, the kind for the long fruit jute that the present invention uses is " middle jute No. four ".
Preferably, the acid solution of addition is organic acid, more preferably acetic acid in step (2).
Preferably, the dimension pressure time is 5-10min in step (3).
Preferably, the method for step (4) separating and filtering is preferably that quartz sand filters.
Preferably, the acid solution used in step (5) is organic acid, and more preferably concentration is 15-30% vinegar
Acid.
High performance liquid chromatography is used to identify obtained jute purity of polysaccharide for 85~90%.
2nd, the method that jute polysaccharide is extracted using dry jute blade and tender tip as raw material, step are as follows：
(1) dry：Long fruit jute harvests blade and tender tip before blooming, the tender tip is that 15cm below plant stem top is left
Right stem-tip tissue, after blade and tender tip are dried, in 35-50 DEG C of drying in oven to constant weight；
(2) crush：Crushed with micronizer, cross 100 mesh mesh screens, obtain particle diameter be 0.15mm jute blade and it is tender slightly
Organize powder (abbreviation jute powder in following steps).
(3) pre-process：The acid solution of concentration 5% is added into powder made from step (2), addition is raw material
100-150%, 30-60min is stirred under normal temperature；
(4) steam blasting：Burst pressure is 1.5MPa, and the dimension pressure time is 8min；
(5) separating and filtering：Filtered through gauze or quartz sand filter, and collect explosion slag；
(6) processing of steam explosion slag：Extract steam explosion slag, extraction time 1-2h, filtering at ambient temperature using acid solution
Obtain leaching liquor；
(7) precipitation is collected：The saturation hexadecyl of 1-5% volumes is added in the leaching liquor obtained into step (6)
Pyridine, precipitation is collected, is precipitated as the jute polysaccharide slightly extracted；
(8) purify：Thick extraction thing in step (7) is separated with high pressure liquid chromatography, purifies that to obtain molecular weight be 500-
The jute polysaccharide of 20000 dalton.
Preferably, the acid solution of addition is organic acid, more preferably acetic acid in step (3), addition and raw material
Quality it is equal.
Preferably, the dimension pressure time is 8min in step (4).
Preferably, the method for step (6) separating and filtering is preferably that quartz sand filters.
Preferably, the acid solution used in step (7) is organic acid, and more preferably concentration is 15-30% vinegar
Acid.
The present invention uses high performance liquid chromatography to identify obtained jute purity of polysaccharide for 81~93%.
3rd, certain density Cr (VI) ion in water body is removed using jute polysaccharide：
(1) the pending preparation containing Cr (VI) sewage：2h potassium bichromate dd H will be dried at 110 DEG C2O dissolves,
Be made into Cr (VI) storing solution, then be configured to the prepare liquid of finite concentration Cr (VI), make its respectively containing 80mg/L, 100mg/L,
120mg/L, 300mg/L, 500mg/L and 700mg/LCr (VI) ion.
(2) pH value is adjusted：100mL certain density Cr (VI) solution is placed in beaker, is 60%-68% with mass fraction
HNO3PH to 4-7 is adjusted with saturation NaOH；
(3) adsorb：It is more that jute of 5-10 times equivalent to Cr (VI) mass of ion is added in treatment sewage in (2)
Sugar, it is placed on stirring instrument and 60-90min is stirred with 150r/min speed.
(4) compliance test result：1.4mL mixed liquors are taken out, centrifuge (15000r/min) 2min, take supernatant to determine Cr (VI) dense
Degree.Cr (VI) concentration is determined using diphenyl carbazide spectrophotometry (GB 7467-1987) in solution.
The pending preparation containing Cr (VI) sewage of above-mentioned steps (1) is in order to verify the effect of the present invention, in actual behaviour
During work, it is only necessary to determine Cr (VI) concentration for the treatment of sewage, the dosage of jute polysaccharide can be both calculated according to step (3).
PH value ranges preferably from 4-5 in step (2).
The effect that Cr (VI) is removed using the adsorbent is represented with clearance, carries out Contrast on effect with jute powder, as a result
See Figure of description (Fig. 1).
Fig. 1 clearly show jute powder and jute polysaccharide processing various concentrations contain Cr (VI) liquid in removal
Rate, when Cr (VI) concentration is less than 100mg/L, the two difference is little, when Cr (VI) concentration is more than 100mg/L, jute
Polysaccharide for Cr (VI) clearance apparently higher than jute powder, especially when Cr (VI) concentration is more than 600mg/L, jute
Powder, less than 50%, if without adsorbing again, far can not reach discharge standard, such as to the clearance of high concentration chrome wastewater
Fruit is handled using jute polysaccharide, and clearance is up to more than 80%, therefore beneficial effects of the present invention are apparent.Work as processing
During the higher sewage of Cr (VI) concentration, increase jute polysaccharide addition, or repeatedly absorption may be selected, until reaching discharge standard
Untill.
Therefore beneficial effects of the present invention are embodied in：
(1) compared with the jute blade powder of prior art, jute polysaccharide adsorbent energy efficient absorption provided by the invention
Chromyl anionic group；
(2) jute polysaccharide provided by the invention, blade and tender tip of the raw material used from the long fruit jute of fibre crops, this
A little materials are agricultural product castoff, and wide material sources, cost is cheap, and nontoxic；
(3) the jute polysaccharide adsorbent prepared using the present invention, it is only necessary to by the pending pH containing Cr (VI) ion waste water
Regulation is to faintly acid, for jute powder and other plant adsorbent, it is not necessary to alkaline solution to molten after processing
Liquid is neutralized, thus reduces cost.
Brief description of the drawings
Fig. 1 is that jute powder and jute polysaccharide produced by the present invention compare figure to Cr (VI) removal effect.
Embodiment
The present invention is further illustrated below by embodiment and comparative example.Following case study on implementation is to further illustrate this
The content of invention, but should not be construed as the limitation of the present invention.Without departing from the spirit and substance of the case in the present invention, to the present invention
The modifications or substitutions that method, step, condition are made, belong to the scope of the present invention.
The fresh jute tissue extraction jute polysaccharide of embodiment 1
(1) the tender tip tissue of 15cm below the blade and stem apex of long fruit jute " middle jute No. four " is harvested before blooming, will be new
Fresh tissue is cleaned, and beater smashes slurrying；
(2) acetic acid of concentration 5% is added into slurries, addition is the 15% of material quality, and 60min is stirred under normal temperature；
(3) above-mentioned raw materials are put into high steam reactor, set burst pressure as 1.5MPa, dimension pressure 8min；
(4) after the completion of steam explosion, filtered by quartz sand, collect explosion slag；
(5) steam explosion slag is extracted at ambient temperature with 25% acetic acid, extraction time 1h, filter to obtain leaching liquor；
(6) precipitation is collected：The saturation hexadecyl of volume ratio 5% is added in the leaching liquor obtained into step (5)
Pyridine, precipitation is collected, is precipitated as the jute polysaccharide slightly extracted；
(7) purify：Thick extraction thing in step (6) is separated with high pressure liquid chromatography, purifies that to obtain molecular weight be 500-
The jute polysaccharide of 20000 dalton.
The dry jute tissue extraction jute polysaccharide of embodiment 2
(1) blade and tender tip are harvested before long fruit jute blooms, the tender tip is plant stem top 15cm or so stem apex
Tissue, after blade and tender tip are dried, in 35-50 DEG C of drying in oven to constant weight；
(2) crushed with micronizer, cross 100 mesh mesh screens, obtain the jute blade and tender slightly organize that particle diameter is 0.15mm
Powder (abbreviation jute powder in following steps).
(3) acetic acid of concentration 5%, addition and raw material (jute powder) are added into jute powder made from step (2)
Quality it is equal, stir 60min under normal temperature；
Remaining steps are same as Example 1, and here is omitted.
Cr (VI) of the embodiment 3 using jute polysaccharide in potassium bichromate solution is removed
(1) the potassium bichromate solution 100mL that the mass concentration for taking Cr (VI) is 200mg/L, is 60%- with mass fraction
68% HNO3PH to 5 is adjusted with saturation NaOH；
(2) 1.5g jute polysaccharide is added in the treatment sewage in (1), is placed on stirring instrument with 150r/min speed
Stir 60min.
(3) compliance test result：1.4mL mixed liquors are taken out, centrifuge (15000r/min) 2min, take supernatant to determine Cr (VI) dense
Degree.Cr (VI) concentration is determined using diphenyl carbazide spectrophotometry (GB 7467-1987) in solution, the concentration of total chromium
Measure uses potassium permanganate oxidation-diphenyl carbazide spectrophotometry.Detection in triplicate, takes the average of result every time.
Testing result is shown, is adsorbed through jute polysaccharide, and after centrifugation, Cr (VI) concentration is reduced to 40mg/L in supernatant,
Through adsorption treatment again, Cr (VI) concentration is reduced to 0.4mg/L, and the concentration of total chromium is reduced to 0.67mg/L, has reached industry
The discharge standard of waste water.
Claims (7)
- A kind of 1. preparation method of jute polysaccharide：(1) raw material prepares：Long fruit jute blade and tender tip are harvested before blooming, the tender tip is 15cm below plant stem top The stem-tip tissue of left and right, flesh tissue is cleaned, and beater band water smashes slurrying, obtains jute slurries；Or long fruit jute blade and tender tip are harvested before blooming, the tender tip is the stem of 15cm or so below plant stem top Point tissue, after blade and tender tip are dried, in 35-50 DEG C of drying in oven to constant weight, crushed with micronizer, cross 100 mesh Mesh screen, obtain the jute powder that particle diameter is 0.15mm；(2) acid solution of concentration 5% is added in the jute slurries or jute powder prepared to step (1), 30- is stirred under normal temperature 60min；(3) steam blasting：Burst pressure is 1.5MPa, and maintenance pressure time is 8min；(4) separating and filtering：Filtered through gauze or quartz sand filter, and collect explosion slag；(5) processing of steam explosion slag：Extract steam explosion slag at ambient temperature using acid solution, extraction time 1-2h, filtering to soak Extract；(6) precipitation is collected：The saturation cetylpyridinium chloride of 1-5% volumes is added in the leaching liquor obtained into step (5), Precipitation is collected, is precipitated as the jute polysaccharide slightly extracted；(7) purify：Thick extraction thing in step (6) is separated with high pressure liquid chromatography, purifies that to obtain molecular weight be 500-20000 roads The jute polysaccharide that you pause.
- 2. preparation method according to claim 1, it is characterised in that in preparation process, when the original prepared in step (1) Expect for jute slurries when, the addition of acid solution is the 10-15% of material quality in step (2), when the raw material prepared in (1) For jute powder when, the addition of acid solution is the 100-150% of material quality in step (2).
- 3. preparation method according to claim 1, it is characterised in that in preparation process, the acidity of addition in step (2) Solution is organic acid.
- 4. preparation method according to claim 1, it is characterised in that in preparation process, step (3) the middle dimension pressure time is 8min。
- 5. preparation method according to claim 1, it is characterised in that in preparation process, the side of step (4) separating and filtering Method is preferably that quartz sand filters.
- 6. application of the obtained jute polysaccharide in Cr (VI) ion is removed in accordance with the method for claim 1, comprising following Step：(1) HNO for being 60%-68% with mass fraction by the pending liquid containing Cr (VI)3PH to 4-7 is adjusted with saturation NaOH；(2) adsorb：Jute polysaccharide of 5-10 times equivalent to Cr (VI) mass of ion is added in treatment sewage in (1), is put 60-90min is stirred with 150r/min speed on instrument in stirring；(3) repeat step (2) is until reach discharge standard.
- 7. application according to claim 6, is characterised by, the pH value for the treatment of sewage is 4-5 in step (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510945761.9A CN105536712B (en) | 2015-12-16 | 2015-12-16 | Jute polysaccharide and its application made from steam explosion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510945761.9A CN105536712B (en) | 2015-12-16 | 2015-12-16 | Jute polysaccharide and its application made from steam explosion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105536712A CN105536712A (en) | 2016-05-04 |
| CN105536712B true CN105536712B (en) | 2018-03-06 |
Family
ID=55816550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510945761.9A Expired - Fee Related CN105536712B (en) | 2015-12-16 | 2015-12-16 | Jute polysaccharide and its application made from steam explosion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105536712B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102090699A (en) * | 2010-11-15 | 2011-06-15 | 江南大学 | Jute root extract with antibacterial activity and preparation method thereof |
| CN102247814A (en) * | 2011-05-17 | 2011-11-23 | 中国农业科学院麻类研究所 | Biomass adsorbent for treatment of heavy metal wastewater and treatment method of heavy metal wastewater |
| CN104607157A (en) * | 2015-01-12 | 2015-05-13 | 哈尔滨工业大学 | Method for preparing heavy metal complexing fiber by quickly modified jute through microwaves and application of fiber |
| CN104887724A (en) * | 2015-05-07 | 2015-09-09 | 同济大学 | Method for preparing extract of corchorus capsularis seeds and application of extract |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103626886B (en) * | 2013-11-20 | 2015-12-30 | 中国农业科学院农产品加工研究所 | A kind of hot pressing steam sprays the method that quick-fried method auxiliary treatment extracts cereal seed coat active polysaccharide |
-
2015
- 2015-12-16 CN CN201510945761.9A patent/CN105536712B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102090699A (en) * | 2010-11-15 | 2011-06-15 | 江南大学 | Jute root extract with antibacterial activity and preparation method thereof |
| CN102247814A (en) * | 2011-05-17 | 2011-11-23 | 中国农业科学院麻类研究所 | Biomass adsorbent for treatment of heavy metal wastewater and treatment method of heavy metal wastewater |
| CN104607157A (en) * | 2015-01-12 | 2015-05-13 | 哈尔滨工业大学 | Method for preparing heavy metal complexing fiber by quickly modified jute through microwaves and application of fiber |
| CN104887724A (en) * | 2015-05-07 | 2015-09-09 | 同济大学 | Method for preparing extract of corchorus capsularis seeds and application of extract |
Non-Patent Citations (2)
| Title |
|---|
| 改性黄麻制备及其对铜离子的吸附;王燕霞等;《环境工程学报》;20150430;第9卷(第4期);1593-1598 * |
| 植物多糖提取方法的研究进展;徐耀;《北京农业》;20130331;2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105536712A (en) | 2016-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Demiral et al. | Adsorption of copper (II) from aqueous solutions on activated carbon prepared from grape bagasse | |
| Reddy et al. | Application of Citrullus lanatus rind as biosorbent for removal of trivalent chromium from aqueous solution | |
| Petrović et al. | Removal of Pb2+ ions by raw corn silk (Zea mays L.) as a novel biosorbent | |
| CN105478085B (en) | Using jute as the preparation and application of the adsorbent of raw material | |
| Shakoor et al. | Utilization of Cucumis sativus peel as an eco-friendly biosorbent for the confiscation of crystal violet dye from artificially contaminated wastewater | |
| Othman et al. | Cucumis melo rind as biosorbent to remove Fe (II) and Mn (II) from synthetic groundwater solution | |
| Hu et al. | Characterization of Acidosasa edulis shoot shell and its biosorption of copper ions from aqueous solution | |
| Kahu et al. | Effective detoxification of hexavalent chromium using sulfate-crosslinked chitosan | |
| CN105413648A (en) | Folium ginkgo adsorbing material and preparation method thereof | |
| CN105561936A (en) | Sweet scented osmanthus leaf modified adsorption material | |
| Joshi et al. | Adsorptive performances and characterisations of biologically synthesised zinc oxide based nanosorbent (ZOBN) | |
| Vaddi et al. | Removal of manganese (II) from aqueous solution by chemically activated thuja occidentalis leaves carbon (CATLC) as an adsorbent: Adsorption equilibrium and kinetic studies | |
| Samejo et al. | Green synthesis of iron oxide nanobiocomposite for the adsorptive removal of heavy metals from the drinking water | |
| CN105536712B (en) | Jute polysaccharide and its application made from steam explosion method | |
| Gondhalekar et al. | Equilibrium and kinetics study of uranium (VI) from aqueous solution by Citrus limetta peels | |
| CN105536713B (en) | The extraction of jute polysaccharide and its application in hexavalent chromium is removed | |
| Harnal et al. | Removal of Congo red dye from wastewater using orange peel as an adsorbent | |
| CN107552015A (en) | A kind of modified mangosteen shell and the method using vanadium in its reduction water body | |
| Aruna Kumari et al. | Removal of Aluminum (III) from polluted water using active carbon derived from barks of Ficus Racemosa Plant | |
| CN105498708B (en) | The means of supercritical extraction of jute polysaccharide and its application | |
| Sidhu et al. | Biosorption of Arsenic (III) from drinking water by using low cost biosorbents derived from peels of Oranges, Turnip and Peanut shells | |
| Boruah et al. | Removal of Ni (II) ions from aqueous solution by using low cost biosorbent prepared from jackfruit (Artocarpus heterophyllus) leaf powder | |
| Malik et al. | Evaluation of kinetics and adsorption isotherms for the Elimination of Pb (II) from aqueous solutions using Aloe barbadensis Miller Leaf Powder | |
| JP2004011086A (en) | Sheet material | |
| Hosen et al. | Removal of chromium from tannery effluent using plant bark and leaf |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180306 Termination date: 20181216 |