CN115282935A - Preparation method and application of ferro-manganese modified yeast powder - Google Patents
Preparation method and application of ferro-manganese modified yeast powder Download PDFInfo
- Publication number
- CN115282935A CN115282935A CN202210991689.3A CN202210991689A CN115282935A CN 115282935 A CN115282935 A CN 115282935A CN 202210991689 A CN202210991689 A CN 202210991689A CN 115282935 A CN115282935 A CN 115282935A
- Authority
- CN
- China
- Prior art keywords
- yeast powder
- adsorption
- ferro
- kmno
- fecl
- 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
Images
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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- 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
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/347—Use of yeasts or fungi
-
- 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
- B01J2220/4868—Cells, spores, bacteria
-
- 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
Abstract
The invention discloses FeCl 3 And KMnO 4 The preparation method of the modified yeast powder comprises the following steps: adding FeCl with a certain concentration into yeast powder 3 And KMnO 4 Mixing to obtain a mixture containing yeast powder; centrifuging and washing the mixture until the washing supernatant is clear, and collecting yeast powder; and (4) freeze-drying the obtained yeast powder to obtain Fe-Mn yeast powder. Also comprises the application of the ferro-manganese modified yeast powder in the treatment of antimonate (Sb (V)) containing solution. The Fe-Mn yeast powder obtained by the invention has strong Sb (V) adsorption capacity, and the adsorption removal rate reaches 98Percent, the adsorption capacity is as high as 124.39 mg. G ‑1 ，FeCl 3 And KMnO 4 The modification increases effective adsorption sites of yeast powder, the iron-manganese oxide is formed on the surface of the yeast powder, and Sb (V) is effectively adsorbed through complexation.
Description
Technical Field
The invention belongs to the technical field of biomass resource recycling, and particularly relates to a preparation method and application of ferro-manganese modified yeast powder.
Background
Antimony (Sb) is a toxic heavy metal element, and is mainly present in stibnite (Sb) 2 S 3 ) And antimony trioxide (Sb) 2 O 3 ) In (1). As the antimony ore mining, industrial production and other human activities make more and more Sb enter the environment, the Sb in water and soil is polluted, and particularly the Sb concentration in the soil and underground water around a tin mine is obviously higher than that of the unpolluted soil and water. In addition, sb can enter human bodies through skin, respiratory tract, food chain and other routes, and excessive intake of Sb can cause cardiovascular diseases, liver diseases, cancer induction and the like. Antimonate (Sb (V)) is the main existing form of antimony in oxygen-containing wastewater, the discharge of the Sb-containing wastewater causes the Sb-containing wastewater to be continuously accumulated in a water environment, thereby threatening the living environment and health of human beings, and Sb pollution becomes one of the problems to be solved urgently in water environment treatment. At present, the Sb-containing wastewater treatment technology comprises coagulation/flocculation, adsorption, membrane separation, an electrochemical method, a biological method and the like. Wherein, the biological method has the characteristics of low cost and environmental protection.
The yeast is a facultative anaerobic unicellular fungus which is widely distributed in soil, water, air and other environments. Yeast, an industrial by-product, is a biological material that is easy to culture, has large yields, is readily available, and is stable in supply. Many researches show that the inactivated yeast can be used for removing pollutants in water, such as heavy metals (Pb, cd, zn, hg, cr and the like), radioactive elements (U, ce, cs, sr and the like), organic pollutants and the like. However, the treatment effect of the yeast powder on the wastewater containing Sb is not ideal, and the yeast powder needs to be modified by a common physical or chemical method so as to achieve the purpose of optimizing the treatment effect. FeCl 3 And KMnO 4 Is an effective modifying reagent, can increase the specific surface area, generate more adsorption sites and unique structures, and improve the adsorption performance of the biological adsorbent to pollutants. The invention is realized by setting the proper FeCl 3 And KMnO 4 And (3) modifying the yeast powder according to the concentration, and obtaining the optimal Sb (V) adsorption condition by adjusting the pH value and the adding amount of the modified yeast powder. The ferro-manganese modified yeast powder can provide a new material for heavy metal pollution remediation including Sb.
Disclosure of Invention
The invention aims to provide a preparation method and application of ferro-manganese modified yeast powder, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the invention provides FeCl 3 And KMnO 4 The preparation method of the modified yeast powder comprises the following steps: 100mL of FeCl with certain concentration is respectively added into 10g of yeast powder 3 And KMnO 4 FeCl 3 And KMnO 4 The concentration of the mixed solution of (1) is 0.25mol, the rotation speed is 200 r.min under the condition of 30 DEG C -1 Continuously oscillating for 24 hours to obtain a mixture containing yeast powder; centrifuging and washing the mixture until the washing supernatant is clear, and collecting yeast powder; freeze drying the obtained yeast powder for 24h to obtain FeCl 3 And KMnO 4 Modifying yeast powder (marked as Fe-Mn yeast powder) together.
The application of ferro-manganese modified yeast powder in the treatment of antimonate-containing solution comprises the following steps:
adjusting the pH of the solution to be treated to a proper value, adjusting the pH to 3-7, adding Fe-Mn yeast powder for adsorption treatment, wherein the adding amount of the Fe-Mn yeast powder is 0.1-1g/L, the adsorption temperature is set to be 30 ℃, and the oscillation speed is 200 r.min -1 The adsorption time is 24h.
The invention has the technical effects and advantages that: the Fe-Mn modified yeast powder prepared by the preparation method and the application thereof has strong Sb (V) adsorption capacity, the adsorption removal rate reaches 98%, and the adsorption capacity reaches 124.39 mg.g -1 。FeCl 3 And KMnO 4 The effective adsorption sites of the yeast powder are increased through modification, iron-manganese oxide is formed on the surface of the yeast powder, and finally Sb (V) is effectively adsorbed through complexation. Therefore, the method has the advantages of simple operation, easily obtained materials and environmental friendliness, and has application potential in remediation of Sb (V) pollution in water.
Drawings
FIG. 1: SEM images of yeast powder and Fe-Mn yeast powder;
FIG. 2: XRD spectrograms of yeast powder and Fe-Mn yeast powder;
FIG. 3: an element mapping chart of Fe-Mn yeast powder;
FIG. 4: the removal rate of Sb (V) by Fe-Mn yeast powder under examples 2 and 3;
FIG. 5: the removal rate and the adsorption amount of the Fe-Mn yeast powder to Sb (V) under the examples 4 and 5;
FIG. 6: fitting an adsorption kinetic model of the Fe-Mn yeast powder adsorbing Sb (V) in example 6;
FIG. 7: adsorption isotherm model fitting of Fe-Mn yeast powder adsorbing Sb (V) under example 7.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
A preparation method of modified yeast powder comprises the following steps:
100mL of FeCl and 0.25mol of FeCl are added into 10g of yeast powder 3 And KMnO 4 Under the condition of 30 ℃ and the rotating speed of 200 r.min -1 Continuously oscillating for 24 hours to obtain a mixture containing yeast powder; centrifuging and washing the mixture until the washing supernatant is clear, and collecting yeast powder; freeze drying the obtained yeast powder for 24h to obtain FeCl 3 And KMnO 4 Modifying yeast powder (marked as Fe-Mn yeast powder) together.
From FIG. 1 YeastIn SEM images of the powder (a) and the Fe-Mn yeast powder (b), the difference between the yeast powder and the Fe-Mn yeast powder can be seen, the surface of the Fe-Mn yeast powder is uneven, on one hand, wrinkles are shown, on the other hand, particles with different sizes grow outwards, and the specific surface area of the yeast powder is increased. As can be seen from the XRD patterns of the yeast powder and the Fe-Mn yeast powder in figure 2, the broad peak of the yeast powder at 19.3 degrees is the amorphous phase of the yeast. The broad diffraction peak of Fe-Mn yeast powder at 19.3 ℃ completely disappears, a weak new peak appears at 36.6 ℃, and the peak is generated due to KMnO 4 MnO formed by oxidation-reduction reaction between the MnO and yeast powder 2 And (4) carrying out oxidation reaction on the surface groups of the yeast powder. This indicates that the ferromanganese treatment destroys the surface crystallinity of the yeast powder and successfully loads manganese to the yeast powder surface. From FIG. 3, it can be seen that a large amount of Fe and Mn elements are distributed on the surface of the Fe-Mn yeast powder sample, and FIG. 3 (b) clearly shows the distribution of oxygen elements, and the adsorption sites on the surface of the Fe-Mn yeast powder are not uniform.
Example 2
This example provides a method for preparing modified yeast powder, which includes the same steps as in example 1.
The embodiment also provides a method for treating the antimonate-containing solution, and the method is applied to preparing the adsorbent. The treatment conditions were: the adding amount is 2 g.L -1 The concentration of the Sb (V) solution is 10 mg.L -1 The adsorption temperature is 30 ℃, and the oscillation rotating speed is 200 r.min -1 The adsorption time is 24h, and the pH is adjusted to 3, 4, 5 and 6 respectively by HCl and NaOH adjusting solutions.
Example 3
This example provides a method for preparing modified yeast powder, which includes the same steps as in example 1.
The embodiment also provides a method for treating the antimonate-containing solution, and the method is applied to preparing the adsorbent. The treatment conditions were the same as in example 2 except that the pH was 7, 8, 9, 10, respectively.
The removal rate of Sb (V) by Fe-Mn yeast powder is obvious along with the change of the pH value of the solution through the example 2 and the example 3. Fig. 4 shows that when the pH of the solution is in the range of 3 to 7, fe — Mn yeast powder has a good effect of removing Sb (V), and the removal rate reaches a maximum of 99.75% at pH =3, and the Sb (V) removal rate of more than 80% can be maintained at pH = 7. As the pH continued to increase, there was a slight decrease in Sb (V) removal. The Fe-Mn yeast powder has wider pH adaptation range for removing Sb (V), which is more beneficial to the practical application of the Fe-Mn yeast powder.
Example 4
This example provides a method for preparing modified yeast powder, which includes the same steps as in example 1.
The embodiment also provides a method for treating the antimonate-containing solution, and the method is applied to preparing the adsorbent. The treatment conditions were: the concentration of the solution with the adsorption pH of 3 and the concentration of the Sb (V) solution of 10 mg.L -1 The adsorption temperature is 30 ℃, and the oscillation rotating speed is 200 r.min -1 The adsorption time is 24h, and the adding amount is respectively 0.1, 0.2 and 0.5 g.L -1 。
Example 5
This example provides a method for preparing modified yeast powder, which includes the same steps as in example 1.
The embodiment also provides a method for treating the antimonate-containing solution, and the method is applied to preparing the adsorbent. The treatment conditions were substantially the same as in example 4 except that the amounts of the additives were 1, 2 and 4 g.L, respectively -1 。
The addition of the adsorbent determines the cost effectiveness of the material in practical application, and the method of example 4 and example 5 shows that the addition of Fe-Mn yeast powder has a great influence on the Sb (V) removal rate, and FIG. 5 shows that the Sb (V) removal rate is rapidly increased along with the increase of the addition of Fe-Mn yeast powder, and the addition amount is 1 g.L -1 The removal rate of Sb (V) tends to be gentle, the removal rate of Sb (V) is about 98%, and the addition amount exceeds 1 g.L -1 The post-removal rate did not change significantly. The Fe-Mn yeast powder has a synergistic effect under the treatment of Fe and Mn, and the adsorption capacity of the Fe-Mn yeast powder to Sb (V) is stronger.
Example 6
This example provides a method for preparing modified yeast powder, which includes the same steps as in example 1.
This example also provides an antimonate-containing saltA solution treatment method for preparing the adsorbent by applying the method. The treatment conditions were: the adding amount is 1 g.L -1 The concentration of the solution having an adsorption pH of 3 and an Sb (V) concentration of 10 mg. L -1 The adsorption temperature is 30 ℃, and the oscillation rotating speed is 200 r.min -1 The adsorption time is respectively 0, 0.5, 1, 2, 4.5, 8, 12, 24, 47.5, 72 and 96h.
As can be seen from FIG. 6, in the initial stage of adsorption (0 h to 4 h), the amount q of Sb (V) adsorbed by Fe-Mn yeast powder t The Sb (V) is rapidly adsorbed to the adsorption sites with higher affinity of the Fe-Mn yeast powder in the period of rapid increase along with the increase of the contact time. Then, as the contact time increases, the adsorption amount q of Sb (V) by Fe-Mn yeast powder t The increase is slow, which is a slow adsorption phase when Sb (V) adsorbs to lower affinity adsorption sites. After 12h, the adsorption capacity is not substantially changed. The balance adsorption capacity of Fe-Mn yeast powder to Sb (V) reaches 12.33 mg.g -1 And the removal rate of 24h is 98.55%. The fitting results of Sb (V) adsorption of Fe-Mn yeast powder are shown in Table 1. Compared with a pseudo first order kinetic model (R) 2 = 0.96), the pseudo-secondary kinetic model is better able to fit experimental data (R) 2 = 0.98). The adsorption equilibrium quantity predicted by the pseudo-second-order kinetic model is 12.85mg g -1 And the data is relatively close to the data obtained by the experiment. As can be seen from kinetic analysis, the adsorption process of Sb (V) on Fe-Mn yeast powder is not simple physical adsorption, but is controlled by chemical adsorption.
TABLE 1 kinetic model fitting parameters for the adsorption of Sb (V) by Fe-Mn Yeast powder
Example 7
This example provides a method for preparing modified yeast powder, which includes the same steps as in example 1.
The embodiment also provides a method for treating the antimonate-containing solution, and the method is applied to preparing the adsorbent. The treatment conditions were: the adding amount is 1 g.L -1 The adsorption pH is 3, the adsorption temperature is 30 ℃, and the oscillation rotating speed is 200 r.min -1 The adsorption time is 24h, the concentration of the Sb (V) solution is 0.01-1000 mg.L -1 。
FIG. 7 shows the adsorption of Sb (V) by Fe-Mn yeast powder at different initial Sb (V) concentrations, and the experimental data were fitted using two models, langmuir and Freundlich, and the results are shown in Table 2. R for Freundlich was found by comparing the correlation coefficients of the two model fits 2 Higher values indicate that the energy of the surface active sites of Fe-Mn yeast powder is not uniform, probably via FeCl 3 And KMnO 4 After the treatment, the coverage of the surfaces of the yeast powder by the iron oxide and the manganese oxide is not complete. It is believed that this adsorption reaction is likely to occur when 1/n is between 0.1 and 0.5, and that 1/n =0.46, which is fit to this study, is between 0.1 and 0.5, and therefore Fe — Mn yeast powder is believed to have a good adsorption effect on Sb (V) in aqueous solution. The calculated maximum Sb (V) adsorption capacity of Fe-Mn yeast powder by Langmuir is 124.39mg g -1 。
TABLE 2 Fe-Mn yeast powder adsorption isotherm model fitting parameters for Sb (V)
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. A preparation method of ferro-manganese modified yeast powder is characterized by comprising the following steps: comprises that
S1: adding FeCl with certain concentration into yeast powder 3 And KMnO 4 The mixed solution is evenly mixed to obtain a mixture containing yeast powder;
s2: centrifuging and washing the mixture until the washing supernatant is clear, and collecting yeast powder;
s3: and (4) freezing and drying the collected yeast powder to obtain Fe-Mn yeast powder.
2. The preparation method of ferro-manganese modified yeast powder according to claim 1, which is characterized by comprising the following steps: in step S1, the yeast powder and FeCl 3 And KMnO 4 The mixing of the mixed solution comprises the specific steps of rotating at a speed of 200 r.min at a temperature of 30 DEG C -1 Next, the shaking was continued for 24 hours.
3. The preparation method of ferro-manganese modified yeast powder according to claim 1, which is characterized by comprising the following steps: in step S1, the FeCl 3 And KMnO 4 The concentration of the mixed solution was 0.25mol.
4. The preparation method of ferro-manganese modified yeast powder according to claim 1, which is characterized by comprising the following steps: in step S3, the freeze-drying time is set to 24h.
5. The use of the ferro-manganese modified yeast powder of claim 1 in the treatment of antimonate-containing solutions, wherein: the processing method comprises the following steps:
adjusting the pH value of the solution to be treated to a proper value, adding Fe-Mn yeast powder into the solution for adsorption treatment, and setting the adsorption temperature at 30 ℃ and the oscillation speed at 200 r.min -1 The adsorption time is 24h.
6. The use of the antimonate-containing solution of iron-manganese modified yeast powder according to claim 5, wherein the antimonate-containing solution comprises: the pH is adjusted to 3-7.
7. The use of the antimonate-containing solution of iron-manganese modified yeast powder according to claim 5, wherein the antimonate-containing solution comprises: the addition amount of the Fe-Mn yeast powder is 0.1-1g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210991689.3A CN115282935A (en) | 2022-08-16 | 2022-08-16 | Preparation method and application of ferro-manganese modified yeast powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210991689.3A CN115282935A (en) | 2022-08-16 | 2022-08-16 | Preparation method and application of ferro-manganese modified yeast powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115282935A true CN115282935A (en) | 2022-11-04 |
Family
ID=83830339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210991689.3A Pending CN115282935A (en) | 2022-08-16 | 2022-08-16 | Preparation method and application of ferro-manganese modified yeast powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115282935A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1528719A (en) * | 1976-06-30 | 1978-10-18 | Ajinomoto Kk | Method of waste water treatment by yeast |
| CN109772271A (en) * | 2019-03-14 | 2019-05-21 | 中国科学院生态环境研究中心 | Modified algae adsorbent of a kind of ferrimanganic and preparation method thereof |
| CN112441658A (en) * | 2019-08-27 | 2021-03-05 | 暨南大学 | Aluminum oxide loaded iron-manganese oxide composite material and preparation method and application thereof |
-
2022
- 2022-08-16 CN CN202210991689.3A patent/CN115282935A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1528719A (en) * | 1976-06-30 | 1978-10-18 | Ajinomoto Kk | Method of waste water treatment by yeast |
| CN109772271A (en) * | 2019-03-14 | 2019-05-21 | 中国科学院生态环境研究中心 | Modified algae adsorbent of a kind of ferrimanganic and preparation method thereof |
| CN112441658A (en) * | 2019-08-27 | 2021-03-05 | 暨南大学 | Aluminum oxide loaded iron-manganese oxide composite material and preparation method and application thereof |
Non-Patent Citations (3)
| Title |
|---|
| YUNXUE XIA等: "Facile preparation of MnO2 functionalized baker’s yeast composites and their adsorption mechanism for Cadmium" * |
| 姜友军等: "KMnO4修饰面包酵母菌对Cd2+的吸附研究" * |
| 解攀等: "改性锯末生物炭对水中As(Ⅲ)和Cd(Ⅱ)吸附机制的研究" * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gan et al. | Adsorption of Cr (VI) and Cu (II) by AlPO4 modified biosynthetic Schwertmannite | |
| Gupta et al. | Biosorption of hexavalent chromium by raw and acid-treated green alga Oedogonium hatei from aqueous solutions | |
| Gupta et al. | Enhanced heavy metals removal and recovery by mesoporous adsorbent prepared from waste rubber tire | |
| Zhang et al. | Fabrication of L-cysteine stabilized α-FeOOH nanocomposite on porous hydrophilic biochar as an effective adsorbent for Pb2+ removal | |
| Cruz et al. | Kinetic modeling and equilibrium studies during cadmium biosorption by dead Sargassum sp. biomass | |
| Akar et al. | Biosorption characteristics of Aspergillus flavus biomass for removal of Pb (II) and Cu (II) ions from an aqueous solution | |
| Tunali et al. | Zn (II) biosorption properties of Botrytis cinerea biomass | |
| Tho et al. | Enhanced simultaneous adsorption of As (iii), Cd (ii), Pb (ii) and Cr (vi) ions from aqueous solution using cassava root husk-derived biochar loaded with ZnO nanoparticles | |
| Yu et al. | Cystine-modified biomass for Cd (II) and Pb (II) biosorption | |
| Zhu et al. | Kinetics and thermodynamic study of phosphate adsorption on the porous biomorph-genetic composite of α-Fe2O3/Fe3O4/C with eucalyptus wood microstructure | |
| Khan et al. | Isotherm and kinetics modeling of Pb (II) and Cd (II) adsorptive uptake from aqueous solution by chemically modified green algal biomass | |
| Sun et al. | Competitive biosorption of zinc (II) and cobalt (II) in single-and binary-metal systems by aerobic granules | |
| Lin et al. | Long-root Eichhornia crassipes as a biodegradable adsorbent for aqueous As (III) and As (V) | |
| CN112028131B (en) | Vulcanized nano zero-valent iron and preparation method and application thereof | |
| Liu et al. | Controlled fabrication of functionalized nanoscale zero-valent iron/celluloses composite with silicon as protective layer for arsenic removal | |
| Nguyen et al. | Preparation of Zn-doped biochar from sewage sludge for chromium ion removal | |
| CN102941060B (en) | Manganese oxide and infusorial earth composite adsorbent for treating lead-containing wastewater and preparation method | |
| Salman et al. | Thermodynamic and kinetic insights into plant-mediated detoxification of lead, cadmium, and chromium from aqueous solutions by chemically modified Salvia moorcroftiana leaves | |
| Osasona et al. | Adsorptive removal of chromium (VI) from aqueous solution using cow hooves | |
| CN102380348A (en) | Pectin modified magnetic nano-adsorbent and preparation method and application thereof | |
| Joshi et al. | Adsorption of heavy metals by biomass | |
| Moosa et al. | Adsorptive removal of lead ions from aqueous solution using biosorbent and carbon nanotubes | |
| Buema et al. | Fly ash magnetic adsorbent for cadmium ion removal from an aqueous solution | |
| Pang et al. | Adsorption of chromium (VI) onto activated carbon modified with KMnO4 | |
| CN115282935A (en) | Preparation method and application of ferro-manganese modified yeast powder |
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 |