CN112408539B - Method for removing heavy metal ions in drinking water - Google Patents
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- CN112408539B CN112408539B CN202011109227.1A CN202011109227A CN112408539B CN 112408539 B CN112408539 B CN 112408539B CN 202011109227 A CN202011109227 A CN 202011109227A CN 112408539 B CN112408539 B CN 112408539B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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Abstract
The invention discloses a method for removing heavy metal ions in drinking water, and belongs to the technical field of drinking water purification. The method for removing heavy metal ions in drinking water of the invention is to add SiO into the drinking water2@ rosin-based macroporous adsorbent resins, based on SiO2The adsorption characteristic of the @ rosin-based macroporous adsorption resin and the difference of the initial concentration of heavy metal cadmium and lead ions in the drinking water adopt a static adsorption method and reasonably control the SiO2The method can efficiently remove heavy metal cadmium and lead ions in the drinking water, and the concentration of the cadmium and lead ions in the drinking water treated by the method can reach the first-level standard of the water source of domestic drinking water (CJ 3020-.
Description
Technical Field
The invention belongs to the field of drinking water purification, and particularly relates to a method for removing heavy metal ions in drinking water.
Background
Heavy metals are potentially harmful persistent pollutants, and are difficult to degrade, accumulate and enrich in fish and crop tissues, and finally harm human health under the action of a food chain. The cadmium and lead ions in the drinking water exceed the standard and can directly harm the health of people, so the cadmium and lead ions in the drinking water need to be removed.
The method for removing heavy metals in drinking water is usually ion exchange method, precipitation method, and adsorption separation method. The precipitation method is commonly used for treating drinking water with high heavy metal concentration, and the removal effect of trace heavy metals in the water is poor. Patent 00131216.2 (method for removing arsenic, lead, chromium, cadmium and mercury in drinking water) describes the ferrite method for removing heavy metals in water, which can effectively remove ions such as lead and cadmium in water. The ferrite method has obvious defects, Guo Yannie and the like report that the method cannot independently recover useful metals, and generally needs heating in the process of forming ferrite, so that the energy consumption is high. In addition, the method has the defects of high salinity of the treated wastewater, incapability of treating the wastewater containing Hg and complex compounds and the like. The adsorption method is the most effective method for treating heavy metals in water, and the core of the adsorption method is the need of an excellent adsorbent. The nanocellulose is fully exposed in hydroxyl groups, has very strong hydrophilicity and polarity, is easy to adsorb metal ions in water, is troublesome to adsorb and filter, and needs to be modified. Patent CN106243282A (modified chitosan/nanocellulose composite aerogel, and preparation method and application thereof) discloses a technology for adsorbing copper ions by using modified nanocellulose aerogel, but the method has many preparation raw materials and complex reaction process. The biological adsorbent is green and environment-friendly, has stable performance, and the patent 201710691978.0 (drinking water heavy metal high-efficiency adsorbent) introduces a high-efficiency adsorbent, wherein the adsorbent contains extracellular polysaccharide obtained by synergistic fermentation of pseudoalteromonas and alteromonas, the removal rate of the adsorbent to cadmium ions reaches 90.4%, but the removal rate to lead ions is only 48%, and the adsorbent is yet to be optimized.
The macroporous adsorption resin method is gradually paid attention to the removal of heavy metals in drinking water, and the macroporous adsorption resin method utilizes exchange groups and rich pore structures of resin to adsorb, exchange and chelate metal ions. However, the monomers of the present macroporous adsorption resin are usually styrene and divinylbenzene, which belong to low-toxicity substances and easily cause secondary pollution to drinking water, such as:
N.N. Toxicology and carcinogenesis students of diazobenzene-HP (Cas No.1321-74-0) in F344/N rates and B6C3F1 microorganisms (inflammation students) [ J ]. National Toxicology Program Technical, Report,2006(534):1. it has been studied on divinylbenzene in high polymer and carcinogenesis experiments, indicating its toxicity.
Therefore, it is necessary to search a method which is safe and environment-friendly and can efficiently remove heavy metal ions, particularly cadmium and lead ions, in drinking water; not only can ensure good removal effect, but also can not cause secondary pollution to drinking water.
Disclosure of Invention
Aiming at the problems, the invention provides a method for removing heavy metal ions in drinking water, which adopts SiO2The @ rosin-based macroporous adsorption resin is safe and environment-friendly for removing heavy metal ions in the drinking water, and particularly has an obvious effect of removing cadmium and lead ions in the drinking water.
The invention is realized by the following technical scheme:
a method for removing heavy metal ions in drinking water comprises the following steps: mixing SiO2The @ rosin-based macroporous adsorption resin is added into the drinking water, and a static adsorption method is adopted to adsorb and treat heavy metal ions in the drinking water.
The static adsorption method is a method in which a certain amount of adsorbent and a certain amount of solution are brought into sufficient contact for a long time to reach equilibrium; the static adsorption method is to adsorb a certain amount of SiO2The method for balancing the @ rosin-based macroporous adsorption resin and a certain amount of drinking water through sufficient contact for a long time.
Further, the heavy metal ions are cadmium ions or lead ions.
Further, when the heavy metal ions are cadmium ions, SiO2The adding amount of the @ rosin-based macroporous adsorption resin is controlled to be 1-10 g.L-1The temperature is 0-40 deg.C, pH is controlled at 3-11, and adsorption time is 30-70 min.
Preferably, when the heavy metal ions are cadmium ions, SiO2The adding amount of the @ rosin-based macroporous adsorption resin is controlled to be 5-10 g.L-1The temperature is 20-40 deg.C, pH is controlled at 5-7, and adsorption time is 45-70 min.
Further, when the heavy metal ions are lead ions, SiO is used2The adding amount of the @ rosin-based macroporous adsorption resin is controlled to be 1-20 g.L-1The temperature is 0-40 ℃, the pH is controlled to be 2-7.5, and the adsorption time isIt is 30-70 min.
Preferably, when the heavy metal ions are lead ions, SiO is adopted2The adding amount of the @ rosin-based macroporous adsorption resin is controlled to be 15-20 g.L-1The temperature is 20-40 deg.C, pH is controlled at 5-7, and adsorption time is 45-60 min.
Further, the SiO2The structural formula of the @ rosin-based macroporous adsorption resin is as follows:
wherein R is:
further, the initial concentrations of cadmium ions and lead ions are 0.2-5ppm and 5-15ppm, respectively.
Further, the drinking water is processed by SiO2After the static adsorption treatment of the @ rosin-based macroporous adsorption resin, the concentrations of cadmium ions and lead ions in the drinking water are respectively reduced to be below 0.01ppm and below 0.05 ppm.
In the present invention, the SiO2The @ rosin-based macroporous adsorption resin has the particle size of 0.45-0.85mm and the pore size distribution of 10-80 nm. The SiO2@ rosin-based macroporous adsorbent resin adopts the patent technology previously applied and published by the applicant @2@ rosin-based polymer microspheres and a preparation method thereof, application No. (201811522372.5)'.
SiO of the invention2The @ rosin-based macroporous adsorption resin can be repeatedly used, and comprises the following steps: soaking the rosin-based macroporous adsorbent resin with saturated adsorption with 0.1-1% citric acid or glacial acetic acid, and then soaking with 0.5-1% NaHCO3The rosin-based macroporous adsorption resin is converted into Na type by the solution, and then the solution is washed by pure water until the solution is nearly neutral.
SiO of the invention2The transformation, adsorption and regeneration principle of the @ rosin-based macroporous adsorption resin is as follows:
(1)SiO2the transformation reaction of the @ rosin-based macroporous adsorption resin is as follows: RH (relative humidity)++Na+→R(Na+)+H+. (sodium salt used in the reaction is sodium bicarbonate)
(2)SiO2The adsorption process of the @ rosin-based macroporous adsorption resin is as follows: 2R (Na)+)+Cd2+/Pb2+→R2Cd/R2Pb+2Na+；
(3)SiO2The regeneration process of the @ rosin-based macroporous adsorption resin is as follows:
R2Cd/R2Pb+H+→RH++Cd2+/Pb2+；
compared with the prior art, the invention has the advantages and beneficial effects that:
1. the method for removing heavy metal ions in drinking water of the invention is to add SiO into the drinking water2@ rosin-based macroporous adsorbent resins, based on SiO2The adsorption characteristic of the @ rosin-based macroporous adsorption resin and the difference of the initial concentration of heavy metal cadmium and lead ions in the drinking water adopt a static adsorption method and reasonably control the SiO2The method has the advantages that parameters such as the adding amount, the temperature, the pH value, the adsorption time and the like of the @ rosin-based macroporous adsorption resin enable heavy metal cadmium and lead ions in the drinking water to be removed efficiently, the treatment step process is simple, complex raw materials are not needed, and the removal effect is obvious. The concentration of cadmium and lead ions in the drinking water treated by the method can reach the first-level standard of the water source of domestic drinking water (CJ 3020 + 1993), and the removal process of the method is green and environment-friendly, particularly has the characteristic of no toxicity, has good economic benefit and environmental benefit, and is very suitable for popularization and application.
2. The process of the invention is carried out by SiO2After the static adsorption treatment of the @ rosin-based macroporous adsorption resin, the removal rate of cadmium ions is 95.86-100%, and the removal rate of lead ions is 97.39-99.40%. And the saturated SiO is adsorbed in the treatment process2The @ rosin-based macroporous adsorption resin has stable performance, can be repeatedly used after being washed, adsorbed, regenerated and transformed, and has good application prospect.
3. SiO selected by the method of the invention2@ rosinyl group is largeThe porous adsorption resin is a polyester polymer material with a core-shell structure, which is synthesized by taking rosin and silica gel as raw materials, has the performance of complete biodegradation, and the material has the advantages of high mechanical strength, very strong pressure resistance, high tolerance to solvents, lower cost, environmental protection, no toxicity and good removal effect on heavy metal cadmium and lead ions in drinking water.
Drawings
FIG. 1 is SiO of examples 1 to 5 of the present invention2The @ rosin-based macroporous adsorption resin has an adsorption effect on cadmium ions in drinking water.
FIG. 2 shows SiO reactions of examples 11 to 17 of the present invention2@ rosin-based macroporous adsorption resin is used for adsorbing lead ions in drinking water.
FIG. 3 shows SiO in example 24 of the present invention2@ rosin-based macroporous adsorption resin is used for removing cadmium and lead ions in drinking water, and the result graph is a reusability result graph.
Detailed Description
The present invention is further illustrated by the following examples, which are provided only for illustrating the present invention and are not intended to limit the scope of the present invention.
SiO for use in the invention2The structural formula of the @ rosin-based macroporous adsorption resin is as follows:
wherein R is:
the SiO2The @ rosin-based macroporous adsorption resin has the particle size of 0.45-0.85mm and the pore size distribution of 10-80 nm. The SiO2@ rosin-based macroporous adsorbent resin adopts the patent technology previously applied and published by the applicant @2@ rosin-based polymer microspheres and a preparation method thereof, application No. (201811522372.5)'.
Example 1
0.5g of SiO was added to 100mL of drinking water (cadmium ion concentration of 0.2ppm)2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 70 min. The removal rate of cadmium ions can reach 96.94%.
Example 2
0.6g of SiO was added to 100mL of drinking water (cadmium ion concentration of 0.2ppm)2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 70 min. The removal rate of cadmium ions can reach 98.66%.
Example 3
0.8g of SiO was added to 100mL of drinking water (cadmium ion concentration of 0.2ppm)2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 70 min. The removal rate of cadmium ions can reach 98.66%.
Example 4
0.9g of SiO was added to 100mL of drinking water (cadmium ion concentration of 0.2ppm)2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 70 min. The removal rate of cadmium ions can reach 99.11%.
Example 5
To 100mL of drinking water (cadmium ion concentration of 0.2ppm) was added 1.0g of SiO2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 70 min. The removal rate of cadmium ions can reach 100 percent.
Example 6
0.1g of SiO was added to 100mL of drinking water (cadmium ion concentration of 0.2ppm)2@ rosin-based macroporous adsorbent resin, with pH 3.0, and shaking at constant temperature of 0 ℃ for 30 min. The removal rate of cadmium ions can reach 95.86%.
Example 7
0.5g of SiO was added to 100mL of drinking water (cadmium ion concentration 1.5ppm)2@ rosin-based macroporous adsorbent resin, pH 5, and shaking at constant temperature of 20 ℃ for 45 min. The removal rate of cadmium ions can reach 97.46 percent.
Example 8
To 100mL of drinking water (cadmium ion concentration of 2.5ppm) was added 1.0g of SiO2@ rosin-based macroporous adsorbent resin, pH ═7, oscillating at constant temperature of 30 ℃ for 60 min. The removal rate of cadmium ions can reach 98.73 percent.
Example 9
To 100mL of drinking water (cadmium ion concentration of 4.0ppm) was added 1.0g of SiO2@ rosin-based macroporous adsorbent resin, pH 7, shaking at constant temperature of 40 ℃ for 70 min. The removal rate of cadmium ions can reach 99.12 percent.
Example 10
To 100mL of drinking water (cadmium ion concentration of 5ppm) was added 1.0g of SiO2@ rosin-based macroporous adsorbent resin, pH 11, shaking at constant temperature of 40 ℃ for 70 min. The removal rate of cadmium ions can reach 98.92 percent.
Comparative example 1
The difference between comparative example 1 and example 3 is that the macroporous adsorbent resin in comparative example 1 is macroporous NDA-02, and the other conditions are the same as those in example 3. The method of the comparative example removes cadmium ions in the drinking water, and the removal rate of the cadmium ions is 78.27%.
Comparative example 2
Comparative example 2 is different from example 3 in that the temperature in comparative example 2 is 50 c, and other conditions are the same as those in example 3. The method of the comparative example removes cadmium ions in the drinking water, and the removal rate of the cadmium ions is 60.82%.
Comparative example 3
Comparative example 3 differs from example 3 in that the pH in comparative example 3 is 2, and the other conditions are the same as those in example 3. The method of the comparative example removes cadmium ions in the drinking water, and the removal rate of the cadmium ions is 62.19%.
Example 11
To 100mL of drinking water (lead ion concentration of 5ppm) was added 1.0g of SiO2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 60 min. The removal rate of lead ions can reach 97.47%.
Example 12
To 100mL of drinking water (lead ion concentration of 5ppm) was added 1.5g of SiO2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 60 min. The removal rate of lead ions can reach 98.85%.
Example 13
To 100mL of drinking water (lead ion concentration of 5ppm) was added 1.6g of SiO2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 60 min. The removal rate of lead ions can reach 98.86%.
Example 14
To 100mL of drinking water (lead ion concentration of 5ppm) was added 1.7g of SiO2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 60 min. The removal rate of lead ions can reach 99.15%.
Example 15
To 100mL of drinking water (lead ion concentration of 5ppm) was added 1.8g of SiO2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 60 min. The removal rate of lead ions can reach 99.31%.
Example 16
To 100mL of drinking water (lead ion concentration of 5ppm) was added 1.9g of SiO2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 60 min. The removal rate of lead ions can reach 99.40%.
Example 17
To 100mL of drinking water (lead ion concentration of 5ppm) was added 2.0g of SiO2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 ℃ for 60 min. The removal rate of lead ions can reach 99.25%.
Example 18
To 100mL of drinking water (lead ion concentration of 5ppm) was added 0.1g of SiO2@ rosin-based macroporous adsorbent resin, with pH 2.0, and shaking at constant temperature of 0 ℃ for 30 min. The removal rate of lead ions can reach 97.39%.
Example 19
To 100mL of drinking water (lead ion concentration of 8ppm) was added 1.0g of SiO2@ rosin-based macroporous adsorbent resin, pH 4.0, and shaking at 10 deg.C for 45 min. The removal rate of lead ions can reach 97.42%.
Example 20
To 100mL of drinking water (lead ion concentration 10ppm) was added 1.5g of SiO2@ rosin-based macroporous adsorption resin with pH 5.0 and constant temperature vibration at 20 DEG COscillating for 45 min. The removal rate of lead ions can reach 98.13%.
Example 21
To 100mL of drinking water (lead ion concentration 12ppm) was added 1.8g of SiO2@ rosin-based macroporous adsorbent resin, pH 6.0, shaking at 30 deg.C for 50 min. The removal rate of lead ions can reach 98.51%.
Example 22
To 100mL of drinking water (lead ion concentration 15ppm) was added 2.0g of SiO2@ rosin-based macroporous adsorbent resin, pH 7.0, shaking at constant temperature of 40 ℃ for 60 min. The removal rate of lead ions can reach 99.05 percent.
Example 23
To 100mL of drinking water (lead ion concentration 15ppm) was added 2.0g of SiO2@ rosin-based macroporous adsorbent resin, pH 7.5, shaking at constant temperature of 40 ℃ for 70 min. The removal rate of lead ions can reach 99.23%.
Comparative example 4
Comparative example 4 is different from example 15 in that the macroporous adsorbent resin in comparative example 4 is macroporous resin NDA-02, and the other conditions are the same as those in example 15. The lead ions in the drinking water were removed by the method of this comparative example, and the removal rate of the lead ions was 77.65%.
Comparative example 5
Comparative example 5 is different from example 15 in that the temperature in comparative example 5 is 50 c, and the other conditions are the same as those in example 15. Lead ions in the drinking water were removed by the method of this comparative example, and the removal rate of lead ions was 61.35%.
Comparative example 6
Comparative example 6 differs from example 15 in that the pH in comparative example 6 was 9, and the other conditions were the same as in example 15. Lead ions in the drinking water were removed by the method of this comparative example, and the removal rate of lead ions was 50.22%.
Example 24
The adsorbed saturated SiO of example 5 and example 172@ rosin-based macroporous adsorbent resin is soaked in 0.5% citric acid, and soaked SiO2Washing with pure water to near neutral, and washing with water0.5％NaHCO3Solution mixing of SiO2@ rosin-based macroporous adsorbent resin is converted into Na type, and then SiO is converted into Na type by using pure water2@ rosin-based macroporous adsorbent resin washes until near neutral. Mixing SiO2The results of using the @ rosin-based macroporous adsorbent resin repeatedly 9 times are shown in FIG. 3, and from FIG. 3, it is clear that SiO2The removal rates of cadmium ions and lead ions in drinking water can still reach 81.16% and 84.46% respectively after the @ rosin-based macroporous adsorption resin is repeatedly used for 9 times, so that SiO2@ rosin-based macroporous adsorption resin has good reusability in removing cadmium and lead ions in drinking water.
The method of the invention is directed to SiO2The characteristics of the @ rosin-based macroporous adsorption resin, the selection difference of cadmium and lead heavy metal ions and the difference of the initial concentrations of the cadmium and lead heavy metal ions in the drinking water control the SiO by the selectively removed ions2The dosage, temperature, pH value and adsorption time of the @ rosin-based macroporous adsorption resin.
The results of the examples prove that the method has good removal effect on cadmium and lead ions in the drinking water, the removal rate of the cadmium ions is 95.86-100%, the removal rate of the lead ions is as high as 97.39-99.40%, and the SiO after repeated use2The @ rosin-based macroporous adsorption resin can still keep a stable performance state, and has a good removal effect after being recycled.
From the comparison of example 3 with comparative example 1 and the comparison of example 15 with comparative example 4, it can be seen that the SiO used in the process according to the invention2The effect of removing cadmium and lead ions of the @ rosin-based macroporous adsorption resin is far greater than that of the conventional macroporous resin NDA-02, and the macroporous resin NDA-02 needs to be converted from a sodium type to a hydrogen type by adding dilute hydrochloric acid before use, has certain pollution type, and is far inferior to that of SiO in the process of removing the cadmium and lead ions2@ rosin-based macroporous adsorption resin is green and environment-friendly; from the comparison of example 3 with comparative examples 2 and 3 and the comparison of example 15 with comparative examples 5 and 6, it can be seen that the process of the invention uses SiO2The @ rosin-based macroporous adsorption resin is suitable for controlling conditions such as temperature, pH value and the like when treating cadmium and lead ions in drinking water, and the aim of efficiently removing the cadmium and lead ions is also fulfilled. Through the methodThe concentration of cadmium and lead ions in the treated drinking water can reach the first-level standard of the water source of domestic drinking water (CJ 3020 + 1993), and the removal process of the method is green and environment-friendly, particularly has the characteristic of no toxicity, has good economic benefit and environmental benefit, and is very suitable for popularization and application.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (6)
1. A method for removing heavy metal ions in drinking water is characterized by comprising the following steps: mixing SiO2Adding the @ rosin-based macroporous adsorption resin into the drinking water, and adsorbing heavy metal ions in the drinking water by adopting a static adsorption method;
the heavy metal ions are cadmium ions or lead ions;
the initial concentrations of the cadmium ions and the lead ions are 0.2-5ppm and 5-15ppm respectively;
the SiO2The structural formula of the @ rosin-based macroporous adsorption resin is as follows:
m≥1，n≥1，
wherein R is:
2. the method according to claim 1, wherein when the heavy metal ions are cadmium ions, SiO is used as the heavy metal ions2The adding amount of the @ rosin-based macroporous adsorption resin is controlled to be 1-10 g.L-1The temperature is 0-40 deg.C, pH is controlled at 3-11, and adsorption time is 30-70 min.
3. The method according to claim 2, wherein when the heavy metal ions are cadmium ions, SiO is used as the heavy metal ions2The adding amount of the @ rosin-based macroporous adsorption resin is controlled to be 5-10 g.L-1The temperature is 20-40 deg.C, pH is controlled at 5-7, and adsorption time is 45-70 min.
4. The method according to claim 1, wherein when the heavy metal ions are lead ions, SiO is used as the heavy metal ions2The adding amount of the @ rosin-based macroporous adsorption resin is controlled to be 1-20 g.L-1The temperature is 0-40 deg.C, pH is controlled at 2-7.5, and adsorption time is 30-70 min.
5. The method according to claim 4, wherein SiO is selected from the group consisting of lead ions, and mixtures thereof2The adding amount of the @ rosin-based macroporous adsorption resin is controlled to be 15-20 g.L-1The temperature is 20-40 deg.C, pH is controlled at 5-7, and adsorption time is 45-60 min.
6. The method for removing heavy metal ions in drinking water according to claim 1, wherein the drinking water is SiO treated2After the static adsorption treatment of the @ rosin-based macroporous adsorption resin, the concentrations of cadmium ions and lead ions in the drinking water are respectively reduced to be below 0.01ppm and below 0.05 ppm.
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| Mechanisms of Adsorption of Heavy Metal Cations from Waters by an Amino Bio-Based Resin Derived from Rosin;Wanting Huang等;《polymers》;20190603;全文 * |
| 松香基羧基化聚合物微球对Pb2+的吸附研究;王丰昶 等;《离子交换与吸附》;20161231;第32卷(第6期);摘要，第1节、第2.2节、第3.1-3.3节，图1-3 * |
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