CN106693913A - Preparation method of cross-linking cationic starch adsorbent - Google Patents
Preparation method of cross-linking cationic starch adsorbent Download PDFInfo
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- CN106693913A CN106693913A CN201510463724.4A CN201510463724A CN106693913A CN 106693913 A CN106693913 A CN 106693913A CN 201510463724 A CN201510463724 A CN 201510463724A CN 106693913 A CN106693913 A CN 106693913A
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Abstract
The invention aims at providing a method for preparing potato cross-linking cationic starch by taking potato starch as a raw material through cross-linking and etherification compound modification treatment. According to the method, a one-step continuous method preparation process is adopted, and the potato starch prepared through a compound modification method is used as an adsorbent and has a good adsorption capability on Pb<2+> in wastewater; the adsorbent has a relatively good desorption capability and can be repeatedly utilized.
Description
Technical field
The present invention relates to a kind of preparation method of Cross-linking Cationic Starch adsorbent.
Background technology
With continuing to develop for industrial economy, the water pollution problems caused by heavy metal ion is increasingly severe.Heavy metal pollution refers to by heavy metal（Such as lead, cadmium, copper, nickel, mercury, zinc）Or the environmental pollution that its compound is caused.Heavy metal wastewater thereby refers to the waste water containing heavy metal of discharge in the industrial processes such as mining and metallurgy, machine-building, chemical industry, electronics, instrument.Heavy metal wastewater thereby is one of environmental pollution most serious and the industrial wastewater maximum to mankind's harm.In China, can all there are many heavy metal pollution of water body caused because of natural cause or human factor to report every year, it can be seen that heavy metal pollution has become the principal element of Chinese water pollution.Therefore, novel heavy metal inorganic agent is researched and developed, it is problem in the urgent need to address to seek cheap effective heavy metal processing method.
The conventional method of heavy mental treatment mainly has chemical precipitation method, oxidation to go back oxygen voltage method, ion-exchange and absorption method in environment.Wherein absorption method shows great advantage：Efficiency high, it is profitable, be easy to operation, selectivity high short with adsorption cycle etc., it is considered as that treatment heavy metal ion-containing waste water is most effective, easily method.
Because starch adsorbent has renewable, biodegradable, low cost and other advantages, since 20 century 70 mid-terms, treatment is modified to starch and prepares functional high-polymer adsorbent just as the focus of relevant scientific and technical personnel research.The modified starch adsorbent obtained by physics, chemical modification and biodegradation, because its raw material sources is wide, cheap, nontoxic, is readily biodegradable and the features such as non-secondary pollution, is had a good application prospect in water pollution treatment.At home, starch phosphate, starch xanthate and acrylamide graft starch have been used for suspended contaminant sedimentation and precipitation of heavy metals, but the species of modified starch is not met by multiple water treatment demand.
Cross-linking Cationic Starch be by starch be crosslinked and be etherified it is composite modified after the starch that obtains.With farina as raw material, crosslinking Treatment first was carried out to it before routinely cationic starch is prepared, insoluble crosslinked starch is obtained, then obtain Cross-linking Cationic Starch with etherifying agent reaction again.Crosslinking denaturation forms close space network between making starch molecule, contributes to heavy metal ion such as：Cadmium, chromium, copper, lead, the flocculation of zinc and precipitation, it is adaptable to the treatment of various industrial sewage.
The content of the invention
It is an object of the invention to provide a kind of preparation method of Cross-linking Cationic Starch adsorbent.
The purpose of the present invention is achieved through the following technical solutions：With farina as raw material, raw material is tuned into 40% starch milk, the epoxychloropropane equivalent to starch quality 0.5% is added after well mixed in the basic conditions, is reacted 4 hours in 25 DEG C of thermostat water baths, be slow added into 1% 3-chloro- 2-hydroxypropyl-trimethyl ammonium chloride of cationic etherifying agent（HTA）, it is placed in after stirring in 30 DEG C of thermostat water baths and is reacted 30 minutes, regulation pH is 6~7 after being cooled to room temperature, with absolute ethanol washing, suction filtration, is dried 8 hours in insulating box, and Cross-linking Cationic Starch is obtained final product after crushing.
Specific embodiment
Weigh 10g farinas and be tuned into 40% starch milk, adjusted after being uniformly mixed, the pH10 of starch milk is adjusted, 0.05ml epoxychloropropane is instilled and is reacted 4 hours in 25 DEG C of thermostat water baths, be slow added into 1ml cationic etherifying agents 3-chloro- 2-hydroxypropyl-trimethyl ammonium chloride（HTA）, it is placed in after stirring in 30 DEG C of thermostat water baths and is reacted 30 minutes, it is 6~7 to be cooled to after room temperature and adjust pH with hydrochloric acid and sodium hydroxide solution, with absolute ethanol washing, suction filtration, is dried 8 hours in insulating box, and Cross-linking Cationic Starch is obtained final product after crushing.
Using：
Simulation Pb2+Waste water initial mass concentration be 80 mg/L, starch adsorption agent consumption be 1.5 g/L, take pH=7, temperature for 30 DEG C, adsorption time be 40 minutes when, potato Cross-linking Cationic Starch is to Pb2+Adsorption rate be 78.4%, adsorbance is 19.6mg/g.At room temperature, up to 92% or so, starch loss late is less than 1% to the desorption rate of potato Cross-linking Cationic Starch.Potato Cross-linking Cationic Starch is to Pb in waste water2+With good adsorption capacity, it is expected to develop into New Type Water Treatment Chemicals.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted, and all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (1)
1. a kind of preparation method of Cross-linking Cationic Starch adsorbent, it is characterised in that：With farina as raw material, it is crosslinked, be etherified it is composite modified prepare potato Cross-linking Cationic Starch, specific preparation method is as follows：
Farina raw material is tuned into 40% starch milk, the epoxychloropropane equivalent to starch quality 0.5% is added after well mixed in the basic conditions, reacted 4 hours in 25 DEG C of thermostat water baths, be slow added into 1% 3-chloro- 2-hydroxypropyl-trimethyl ammonium chloride of cationic etherifying agent（HTA）, it is placed in after stirring in 30 DEG C of thermostat water baths and reacts 30min, regulation pH is 6~7 after being cooled to room temperature, with absolute ethanol washing, suction filtration, is dried 8 hours in insulating box, and Cross-linking Cationic Starch is obtained final product after crushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510463724.4A CN106693913A (en) | 2015-08-02 | 2015-08-02 | Preparation method of cross-linking cationic starch adsorbent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510463724.4A CN106693913A (en) | 2015-08-02 | 2015-08-02 | Preparation method of cross-linking cationic starch adsorbent |
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| Publication Number | Publication Date |
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| CN106693913A true CN106693913A (en) | 2017-05-24 |
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| CN201510463724.4A Pending CN106693913A (en) | 2015-08-02 | 2015-08-02 | Preparation method of cross-linking cationic starch adsorbent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930597A (en) * | 2017-12-07 | 2018-04-20 | 南京大学 | A kind of modified starch/quartz sand complex microsphere and its preparation method and application |
| CN108147518A (en) * | 2017-12-29 | 2018-06-12 | 湖南省塑料研究所有限公司 | Modified starch water treatment agent and its preparation method and application |
-
2015
- 2015-08-02 CN CN201510463724.4A patent/CN106693913A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930597A (en) * | 2017-12-07 | 2018-04-20 | 南京大学 | A kind of modified starch/quartz sand complex microsphere and its preparation method and application |
| CN108147518A (en) * | 2017-12-29 | 2018-06-12 | 湖南省塑料研究所有限公司 | Modified starch water treatment agent and its preparation method and application |
| CN108147518B (en) * | 2017-12-29 | 2020-10-30 | 湖南省塑料研究所有限公司 | Modified starch water treatment agent and preparation method and application thereof |
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Application publication date: 20170524 |
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| WD01 | Invention patent application deemed withdrawn after publication |