CN109626479A - A method of using radionuclide in charcoal removal waste water - Google Patents
A method of using radionuclide in charcoal removal waste water Download PDFInfo
- Publication number
- CN109626479A CN109626479A CN201811442687.9A CN201811442687A CN109626479A CN 109626479 A CN109626479 A CN 109626479A CN 201811442687 A CN201811442687 A CN 201811442687A CN 109626479 A CN109626479 A CN 109626479A
- Authority
- CN
- China
- Prior art keywords
- charcoal
- radionuclide
- waste water
- removal waste
- rice straw
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—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
- C02F2101/00—Nature of the contaminant
- C02F2101/006—Radioactive compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention belongs to technical field of radioactive wastewater treatment, and disclose and be related to a kind of method using radionuclide in charcoal removal waste water.This method be by biomass under conditions of starvation pyrogenically prepared charcoal, the charcoal is then added into the waste water containing radionuclide and is sufficiently mixed, finally oscillation promotes the absorption of the charcoal to radionuclide at a constant temperature.The present invention selects raw material of the abandoned biomass as charcoal, can achieve the purpose that " treatment of wastes with processes of wastes against one another ", and charcoal pair prepared by the present invention60Co has Selective adsorption；The charcoal pair when pH is 7~10 in waste water60The adsorption effect of Co is best, and equilibrium adsorption capacity can achieve 30mg/g or more；It is right when the additive amount of charcoal is 0.5g/L60The equilibrium adsorption capacity of Co can reach 24.45mg/g.
Description
Technical field
The invention belongs to technical field of radioactive wastewater treatment, remove waste water using charcoal more particularly, to a kind of
The method of middle radionuclide.
Background technique
Co60It is radionuclide common in nuclear industry waste water, big, long half time (5.27), radioactivity with toxicity
By force the features such as (gamma-rays average energy 1.25MeV), human body can be entered through alimentary canal and respiratory tract, caused vomiting, an awful ache in the belly
Equal allergic reactions, even result in canceration.Therefore, cobalt is monitoring project important in the analysis such as environment, life science and medicine, right
Cobalt is dealt carefully with important practical significance.
Currently used Spent Radioactive method for treating water mainly include ion-exchange, evaporation concentration method, chemical precipitation method,
Biological treatment, absorption method, magnetic-molecule process, inertia solidification method, Zero-valent Iron diafiltration reaction wall technology etc..Wherein, absorption method is because of it
Efficiently, the easy, advantages such as separation costs are low, are widely applied in Spent Radioactive water process.Its principle is to utilize porous solid
The physical absorption of adsorbent and chemisorption performance adsorbing separation water pollutant.By optimization experiment condition and to adsorbent into
Row improvement can make certain water body Radionuclide ion remaval rate reach 90% or more.
In recent years, charcoal is as a kind of with height pore structure, the adsorbent haveing excellent performance table in the treatment of waste water
Reveal good application prospect.But it is mostly the common metals ions such as lead (Pb), copper (Cu), chromium (Cr) that it, which removes object, to radiation
Property nucleic using less.Before the study found that the charcoal made of Pericarppium Armeniacae Amarum, wild chrysanthemum, lebbek etc. to Co2+Have compared with
Good suction-operated, but these material sources are few, and not easily collecting.It is about 200,000,000 tons that China produces straw every year, and it is total to account for crops
20% or more of amount, however the utilization of its waste is but very low always.The charcoal made of the rice after being pyrolyzed has phase
To higher specific surface area (20~90m2/ g), oxygen-containing functional group abundant, adsorption efficiency is high, low in cost and raw material easily again
It makes profits use, has achieved the purpose that " treatment of wastes with processes of wastes against one another ", there is important application value, it is latent with preferable Adsorption of Radioactive nucleic
Power.
Summary of the invention
For the disadvantages mentioned above and/or Improvement requirement of the prior art, the present invention provides a kind of removed using charcoal to give up
The method of waterborne radioactivity nucleic, wherein passing through the techniques items such as the pH value of the additive amount of type, charcoal to biomass, waste water
The control of part should be able to mutually effectively improve charcoal to radionuclide especially60The adsorption capacity of Co, thus it is suitable for processing
Radionuclide in waste water.
To achieve the above object, the invention proposes it is a kind of using charcoal removal waste water in radionuclide method,
It is characterized in that, this method is specific as follows:
By biomass under conditions of starvation pyrogenically prepared charcoal, then into the waste water containing radionuclide plus
Enter the charcoal and be sufficiently mixed, finally oscillation promotes absorption of the charcoal to radionuclide at a constant temperature.
As it is further preferred that the biomass be one of stalk, cotton, ginkgo leaf, reed or water hyacinth or
It is a variety of, and further preferably rice straw.
As it is further preferred that the radionuclide includes60Co and90Sr。
As it is further preferred that the charcoal pair60Co has Selective adsorption.
As it is further preferred that the additive amount of charcoal is 0.25g/L~4g/ in the waste water containing radionuclide
L, and further preferably 0.5g/L~1g/L.
As it is further preferred that the vibration temperature is preferably 25 DEG C~55 DEG C, duration of oscillation is preferably 1h~37h.
As it is further preferred that the pH of the waste water containing radionuclide be 5~10, and further preferably 7~
10。
As it is further preferred that the temperature of the biomass pyrolytic is preferably 300 DEG C~700 DEG C.
As it is further preferred that the time of the biomass pyrolytic is preferably 1h~4h.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, mainly have below
Technological merit:
1. the present invention uses charcoal, the especially charcoal of rice straw preparation as adsorbent, because it has absorption
Site is more, large amount of adsorption and is not easy the characteristics of being desorbed and the radionuclide suitable for handling waste water, while adsorption reaction
Mild condition, the radioactive waste generated after absorption is small in size, convenient temporary, therefore has a wide range of applications space；
2. simultaneously, the present invention selects raw material of the abandoned biomass as charcoal, and preparation process is simple, at low cost
It is honest and clean, it can achieve the purpose that " treatment of wastes with processes of wastes against one another "；
3. especially, charcoal pair prepared by the present invention60The equilibrium adsorption capacity of Co much larger than pair90The equilibrium adsorption capacity of Sr,
Therefore the charcoal pair60Co has Selective adsorption；In addition, the present invention has wider application range, can be used for it is acid, in
Property or alkaline waste water, and when in waste water pH be 7~10 when charcoal pair60The adsorption effect of Co is best, and equilibrium adsorption capacity can be with
Reach 30mg/g or more；And the very few adsorption effect that will lead to of the additive amount of charcoal is bad in adsorption process, excessively can then make
At increased costs, the additive amount of charcoal is preferably 0.5g/L~1g/L in the present invention, and when the additive amount of charcoal is
It is right when 0.5g/L60The equilibrium adsorption capacity of Co can reach 24.45mg/g, therefore the additive amount of charcoal is in the range
It can be to avoid the waste of charcoal while guarantee adsorbance.
Detailed description of the invention
Fig. 1 is the process flow chart provided by the invention using charcoal removal radionuclide；
Fig. 2 (a)~(d) is the SEM table under the rice straw charcoal different amplification prepared in the embodiment of the present invention 1
Levy spectrogram；
Fig. 3 is the XRD spectra of the rice straw charcoal prepared in the embodiment of the present invention 1；
Fig. 4 is the adsorption-desorption isothermal of the rice straw charcoal prepared in the embodiment of the present invention 1；
Fig. 5 is the graph of pore diameter distribution of the rice straw charcoal prepared in the embodiment of the present invention 1.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
As shown in Figure 1, the invention proposes a kind of method using radionuclide in charcoal removal waste water, feature
It is, this method is specific as follows:
By biomass in starvation and under conditions of temperature is 300 DEG C~700 DEG C, pyrolysis 1h~4h preparation biology
Then charcoal is added in the waste water containing radionuclide and is sufficiently mixed with the additive amount of 0.25g/L~4g/L by charcoal, and
Constant temperature oscillation 1h~37h at a temperature of 25 DEG C~55 DEG C, to promote absorption of the charcoal to radionuclide.
Further, the biomass can select one of stalk, cotton, ginkgo leaf, reed or water hyacinth or a variety of,
These biomass belong to agricultural wastes, from a wealth of sources, low in cost, while passing through the life of characterization discovery rice straw preparation
Object charcoal has apparent three-layer laminated structure, higher specific surface area and oxygen-containing functional group abundant, thus is especially suitable for absorption
Radionuclide in waste water.
Further, the radionuclide includes60Co and90Sr, charcoal pair60Co has Selective adsorption, wherein rice
Straw biological charcoal pair60The maximum equilibrium adsorption capacity of Co can achieve 32.33mg/g.
Further, when the additive amount of the charcoal is 0.5g/L~1g/L, charcoal pair60The equilibrium adsorption capacity of Co is opposite
It is higher, it can be with save the cost while guaranteeing adsorption effect.
Further, the pH of the waste water will affect charcoal to the adsorption effect of radionuclide, and the present invention is to waste water
PH requirement is lower, can be adapted for acid, neutral or alkaline waste water；To guarantee adsorption effect, the pH of waste water is preferably 5~10；
If waste water is neutral or alkalinity, the charcoal is best to the adsorption effect of radionuclide, and equilibrium adsorption capacity can achieve
30mg/g or more, therefore the pH of waste water is more preferably 7~10.
Embodiment 1
By paddy stalk, starvation is pyrolyzed 2 hours in 300 DEG C of heating device, and grinding obtains rice straw after collection
Charcoal；The rice straw charcoal is added in the waste water containing radionuclide with the mass ratio of 0.5g/L, wherein Co2+It is dense
Degree is 15.56mg/L, wastewater pH 6, is then placed it in desk-top constant-temperature shaking incubator with the revolving speed of 200rpm at 25 DEG C
It is tested after lower oscillation 25h, Co in waste water after being adsorbed2+Concentration be 4.78mg/L, rice straw charcoal is to Co2+
Equilibrium adsorption capacity be 21.40mg/g.
Co in sample2+The test method of concentration are as follows: by waste water after the filtering with microporous membrane of 0.22m, using Atomic absorption
Sub-ray spectrometer (RayLeigh, WFX-220B) detects wherein Co2+Concentration.
Electronic Speculum (SEM) characterization is scanned to the rice straw charcoal, as a result as shown in Fig. 2 (a)~(d), wherein
Fig. 2 (a) and Fig. 2 (b) shows that the rice straw charcoal has apparent three-layer laminated structure, and Fig. 2 (c) and Fig. 2 (d) display should
The well table bread of rice straw charcoal covers flat crystal, and diameter is about 10nm~300nm.
X-ray diffraction (XRD) analysis is carried out to the rice straw charcoal, as a result as shown in figure 3, the rice straw is raw
Object charcoal is with CaCO3Characteristic diffraction peak based on (card number 47-1743)；2 θ be 29.3945 °, 35.9412 °,
39.4484 °, 43.1309 °, 47.5538 ° and 48.567 ° appearance diffraction maximums correspond respectively to (104), (110), (11-3),
(202), (018) and (11-6) crystal face.
The adsorption-desorption isothermal figure of the rice straw charcoal is as shown in figure 4, according to BDDT classification
IV type adsorption desorption is presented in (Brunauer-Deming-Deming-Teller classification), the rice straw charcoal
Isothermal curve band H3 type hysteresis loop illustrates that the compound has typical meso pore characteristics, and hole is that platy particle is accumulated to be formed
Slit pore；The pore-size distribution obtained using DFT model is as shown in figure 5, the pore-size distribution of the rice straw charcoal mainly collects
In in 6.99nm or so, further demonstrate it as meso-hole structure, and its specific surface area is 2m2/ g~20m2/ g, aperture are
6.9871nm pore volume 0.004024cm3/g。
Embodiment 2
By paddy stalk, starvation is pyrolyzed 2 hours in 300 DEG C of heating device, and grinding obtains rice straw after collection
Charcoal；The rice straw charcoal is added in the waste water containing radionuclide with the mass ratio of 0.5g/L, wherein Sr2+It is dense
Degree is 17.15mg/L, wastewater pH 6, is then placed it in desk-top constant-temperature shaking incubator with the revolving speed of 200rpm at 25 DEG C
It is tested after lower oscillation 25h, Sr in waste water after being adsorbed2+Concentration be 7.27mg/L, rice straw charcoal is to Sr2+
Equilibrium adsorption capacity be 4.98mg/g, with embodiment 1 in rice straw charcoal to Co2+Equilibrium adsorption capacity compare, rice straw
Stalk charcoal is in single adsorption system to Co2+Adsorption capacity be much larger than Sr2+Adsorption capacity.
Embodiment 3
By paddy stalk, starvation is pyrolyzed 2 hours in 300 DEG C of heating device, and grinding obtains rice straw after collection
Charcoal；The rice straw charcoal is added in the waste water containing radionuclide with the mass ratio of 0.5g/L, wherein Co2+It is dense
Degree is 16.07mg/L, Sr2+Concentration be 23.68mg/L, wastewater pH 6, then place it in desk-top constant-temperature shaking incubator
It is tested after vibrating 25h at 25 DEG C with the revolving speed of 200rpm, Co in waste water after being adsorbed2+Concentration be 11.75mg/L,
Rice straw charcoal is to Co2+Equilibrium adsorption capacity be 13.63mg/g, Sr in waste water after absorption2+Concentration be 23.53mg/L,
Rice straw charcoal is to Sr2+Equilibrium adsorption capacity be 0.39mg/g, the rice straw charcoal is right in competitive Adsorption system
Co2+Adsorption capacity be much larger than Sr2+Adsorption capacity.
Embodiment 4
By paddy stalk, starvation is pyrolyzed 4 hours in 500 DEG C of heating device, and grinding obtains rice straw after collection
Charcoal；The rice straw charcoal is added respectively with the mass ratio of 0.25g/L, 0.5g/L, 1.0g/L, 2.0g/L, 4.0g/L
Enter in the waste water containing radionuclide, wherein Co2+Concentration be 13.91mg/L, wastewater pH 6, then place it in desk-top perseverance
It is tested after vibrating 37h at 25 DEG C with the revolving speed of 200rpm in warm shaken cultivation case, Co in waste water after being adsorbed2+It is dense
Degree and rice straw charcoal are to Co2+Equilibrium adsorption capacity it is as shown in table 1.
Table 1
As shown in table 1, when the dosage of rice straw charcoal is 0.5g/L, to Co2+Equilibrium adsorption capacity it is maximum, reach
To 24.45mg/g.
Embodiment 5
By paddy stalk, starvation is pyrolyzed 2 hours in 300 DEG C of heating device, and grinding obtains rice straw after collection
Charcoal；The rice straw charcoal is added in the waste water containing radionuclide with the mass ratio of 0.5g/L, wherein Co2+It is dense
As shown in table 2, pH is respectively 5.42,6.32,7.14,9.34,10.01 to degree, then places it in desk-top constant-temperature shaking incubator
In vibrated at 40 DEG C with the revolving speed of 200rpm and tested afterwards for 24 hours, Co in waste water after being adsorbed2+Concentration and rice straw
Charcoal is to Co2+Equilibrium adsorption capacity it is as shown in table 2.
Table 2
As shown in table 2, when the pH of waste water is 7~10, rice straw charcoal is to Co2+Adsorption effect it is best, Ke Yida
To 30mg/g or more, and when the pH of waste water is 9.34, rice straw charcoal is to Co2+Equilibrium adsorption capacity be up to
32.33mg/g。
Embodiment 6
By cotton, starvation is pyrolyzed 1 hour in 700 DEG C of heating device, and grinding obtains cotton charcoal after collection；
The cotton charcoal is added in the waste water containing radionuclide with the mass ratio of 0.5g/L, wherein wastewater pH is 6, Co2+It is dense
Na in degree and waste water+: Co2+Molar ratio it is as shown in table 3, then place it in desk-top constant-temperature shaking incubator with 200rpm's
Revolving speed is tested after vibrating 1h at 25 DEG C, Co in waste water after being adsorbed2+Concentration and cotton charcoal to Co2+It is flat
The adsorbance that weighs is as shown in table 3.
Table 3
As shown in table 3, Na in waste water+Presence can be to Co2+Absorption have a certain impact, there are Na in waste water+Shi Mian
Flower charcoal is to Co2+Adsorption capacity be 13.07mg/g-17.35mg/g.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of method using radionuclide in charcoal removal waste water, which is characterized in that this method is specific as follows:
By biomass under conditions of starvation pyrogenically prepared charcoal, institute is then added into the waste water containing radionuclide
It states charcoal and is sufficiently mixed, finally oscillation promotes absorption of the charcoal to radionuclide at a constant temperature.
2. as described in claim 1 using the method for radionuclide in charcoal removal waste water, which is characterized in that the life
Substance is one of stalk, cotton, ginkgo leaf, reed or water hyacinth or a variety of, and further preferably rice straw.
3. as claimed in claim 1 or 2 using the method for radionuclide in charcoal removal waste water, which is characterized in that institute
Stating radionuclide includes60Co and90Sr。
4. the method as claimed in any one of claims 1 to 3 using radionuclide in charcoal removal waste water, feature exist
In the charcoal pair60Co has Selective adsorption.
5. such as the described in any item methods using radionuclide in charcoal removal waste water of Claims 1 to 4, feature exists
In the additive amount of charcoal is 0.25g/L~4g/L, and further preferably 0.5g/L in the waste water containing radionuclide
~1g/L.
6. the method as claimed in any one of claims 1 to 5 using radionuclide in charcoal removal waste water, feature exist
In the vibration temperature is preferably 25 DEG C~55 DEG C, and duration of oscillation is preferably 1h~37h.
7. the method as described in any one of claims 1 to 6 using radionuclide in charcoal removal waste water, feature exist
In the pH of the waste water containing radionuclide is 5~10, and further preferably 7~10.
8. the method as described in any one of claims 1 to 7 using radionuclide in charcoal removal waste water, feature exist
In the temperature of the biomass pyrolytic is preferably 300 DEG C~700 DEG C.
9. the method as described in any one of claims 1 to 8 using radionuclide in charcoal removal waste water, feature exist
In the time of the biomass pyrolytic is preferably 1h~4h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442687.9A CN109626479A (en) | 2018-11-29 | 2018-11-29 | A method of using radionuclide in charcoal removal waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442687.9A CN109626479A (en) | 2018-11-29 | 2018-11-29 | A method of using radionuclide in charcoal removal waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109626479A true CN109626479A (en) | 2019-04-16 |
Family
ID=66069979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811442687.9A Pending CN109626479A (en) | 2018-11-29 | 2018-11-29 | A method of using radionuclide in charcoal removal waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109626479A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110124641A (en) * | 2019-04-29 | 2019-08-16 | 华中科技大学 | A kind of radionuclide adsorbent material and its preparation method and application |
| CN111063469A (en) * | 2019-12-23 | 2020-04-24 | 天津大学 | Method for removing radionuclide strontium in water |
| CN114082400A (en) * | 2021-11-09 | 2022-02-25 | 陇东学院 | Method for preparing biochar by co-pyrolysis of rubber and ginkgo leaves and application of biochar in removal of antibiotics in water body |
| CN114950359A (en) * | 2022-04-25 | 2022-08-30 | 山东农业工程学院 | Biomass charcoal-based nano composite material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014194363A1 (en) * | 2013-06-05 | 2014-12-11 | James Cook University | Algal biomass biosorbent and methods for use |
| CN108236918A (en) * | 2016-12-27 | 2018-07-03 | 海门市源美美术图案设计有限公司 | Efficient absorption charcoal prepared by a kind of rice straw and preparation method thereof |
-
2018
- 2018-11-29 CN CN201811442687.9A patent/CN109626479A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014194363A1 (en) * | 2013-06-05 | 2014-12-11 | James Cook University | Algal biomass biosorbent and methods for use |
| CN108236918A (en) * | 2016-12-27 | 2018-07-03 | 海门市源美美术图案设计有限公司 | Efficient absorption charcoal prepared by a kind of rice straw and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| MARTIN PIPISKA,ET AL.: ""Sorption separation of cobalt and cadmium by straw-derived biochar: a radiometric study"", 《JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY》 * |
| NEONJYOTI BORDOLOI,ET AL.: ""Biosorption of Co (II) from aqueous solution using algal biochar: Kinetics and isotherm studies"", 《BIORESOURCE TECHNOLOGY》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110124641A (en) * | 2019-04-29 | 2019-08-16 | 华中科技大学 | A kind of radionuclide adsorbent material and its preparation method and application |
| CN110124641B (en) * | 2019-04-29 | 2020-05-19 | 华中科技大学 | Radionuclide adsorption material and preparation method and application thereof |
| CN111063469A (en) * | 2019-12-23 | 2020-04-24 | 天津大学 | Method for removing radionuclide strontium in water |
| CN114082400A (en) * | 2021-11-09 | 2022-02-25 | 陇东学院 | Method for preparing biochar by co-pyrolysis of rubber and ginkgo leaves and application of biochar in removal of antibiotics in water body |
| CN114950359A (en) * | 2022-04-25 | 2022-08-30 | 山东农业工程学院 | Biomass charcoal-based nano composite material and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Cui et al. | Capacity and mechanisms of ammonium and cadmium sorption on different wetland-plant derived biochars | |
| CN109626479A (en) | A method of using radionuclide in charcoal removal waste water | |
| Zhao et al. | Adsorption of nitrate onto biochar derived from agricultural residuals | |
| Bekçi et al. | Removal of malachite green by using an invasive marine alga Caulerpa racemosa var. cylindracea | |
| Nakkeeran et al. | Hexavalent chromium removal from aqueous solutions by a novel powder prepared from Colocasia esculenta leaves | |
| Jorfi et al. | Adsorption of Cr (VI) by natural clinoptilolite zeolite from aqueous solutions: isotherms and kinetics | |
| El-Nemr et al. | The use of biochar-NH 2 produced from watermelon peels as a natural adsorbent for the removal of Cu (II) ion from water | |
| Tang et al. | Removal of ammonium from swine wastewater using synthesized zeolite from fly ash | |
| Li et al. | Chitosan modification persimmon tannin bioadsorbent for highly efficient removal of Pb (II) from aqueous environment: the adsorption equilibrium, kinetics and thermodynamics | |
| Deng et al. | Removal of Zn (II), Mn (II) and Cu (II) by adsorption onto banana stalk biochar: adsorption process and mechanisms | |
| Liu et al. | Adsorption characteristics of ammonium nitrogen by biochar from diverse origins in water | |
| Zhang et al. | Efficient removal of Cu (II), Zn (II), and Cd (II) from aqueous solutions by a mineral-rich biochar derived from a spent mushroom (Agaricus bisporus) substrate | |
| Makeswari et al. | Use of Ricinus communis leaves as a low-cost adsorbent for removal of Cu (II) ions from aqueous solution | |
| Cirik et al. | Heavy metals uptake from aqueous solutions using marine algae (Colpomenia sinuosa): kinetics and isotherms | |
| Abba et al. | Synthesis of nano-magnetite from industrial mill chips for the application of boron removal: characterization and adsorption efficacy | |
| Rao et al. | Application of Terminalia arjuna as potential adsorbent for the removal of Pb (II) from aqueous solution: thermodynamics, kinetics and process design | |
| Elewa et al. | Chemically activated carbon based on biomass for adsorption of Fe (III) and Mn (II) Ions from aqueous solution | |
| Mondal et al. | Biosorption of fluoride from aqueous solution using lichen and its Ca-pretreated biomass | |
| Geleta et al. | Volcanic rock materials for defluoridation of water in fixed-bed column systems | |
| Militaru et al. | Using sewage sludge ash as an efficient adsorbent for Pb (II) and Cu (II) in single and binary systems | |
| Zhang et al. | Preparation of magnetic activated carbon by activation and modification of char derived from co-pyrolysis of lignite and biomass and its adsorption of heavy-metal-containing wastewater | |
| Ashraf et al. | Nanoarchitectonics and kinetics insights into fluoride removal from drinking water using magnetic tea biochar | |
| Hannachi et al. | Removal of Ni (II) ions from aqueous solutions using clinoptilolite: equilibrium, kinetic and thermodynamic studies | |
| Ekere et al. | Studies of biosorption of Pb2+, Cd2+ and Cu2+ from aqueous solutions using Adansonia digitata root powders | |
| Shokrolahzadeh et al. | Modification of nano clinoptilolite zeolite using sulfuric acid and its application toward removal of arsenic from water sample |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190416 |