CN102311161A - Method for treating red tide by using sand - Google Patents
Method for treating red tide by using sand Download PDFInfo
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- CN102311161A CN102311161A CN2010102145223A CN201010214522A CN102311161A CN 102311161 A CN102311161 A CN 102311161A CN 2010102145223 A CN2010102145223 A CN 2010102145223A CN 201010214522 A CN201010214522 A CN 201010214522A CN 102311161 A CN102311161 A CN 102311161A
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Abstract
The invention provides a method for treating marine red tide organism by taking modified sand as a complex flocculant. With the method, sand is modified by the synergistic effect of a non-toxic, harmless and biodegradable natural high molecular polymer and an inorganic high molecular flocculant; when the red tide happens, the modified sand is added to the surface of a red tide water body to quickly flocculate and subside red tide organism, efficiently remove harmful algae and effectively control the spreading and occurrence of red tide. In addition, the marine environment is not polluted, and a normal marine ecosystem cannot be disturbed. The method provided by the invention is a method for safely, economically and efficiently treat the marine red tide, and can be widely applied to red tide treatment of oceans, culture zones, intertidal zones and riverways.
Description
Technical field
The present invention relates to a kind of method of administering marine red tide.Specifically, utilize in nontoxic, harmless, the water body and be easy to biodegradable natural polymers and inorganic polymer flocculant modified synergic sand, make its efficient flocculating and remove the marine red tide harmful organism.The invention belongs to pollution of the sea control field.
Background technology
Red tide is because the variation of ocean environment condition causes explosive breeding such as plant plankton, protozoon or bacterium or gathering in the ocean, causes the ecological unusual phenomenon of water body variable color.Red tide is a kind of global Oceanic disasters.Nearly decades, the outburst frequency of global red tide, scale, geographic range constantly increase, havoc the marine eco-environment, bring about great losses for the littoral economy in ocean, and endangering existent environment of people.Red tide not only makes the water quality severe exacerbation, and anoxic causes a large amount of fish kills, and the algae toxin can get into marine food chain, finally causes human diseases even death.In China, along with the continuous development of modernization industry with agricultural, a large amount of pollution substance discharge into seas, the serious eutrophication of coastal waters causes red tide to take place frequently.By the end of the year 2002, China has the red tide incident of record to have 580 times, and frequency is with the speed increment of 3 times of increases in per 10 years.The generation scale of red tide presents the trend of rapid expansion, and poisonous, deleterious red tide kind constantly increases.
Up to the present, still not having technology in the world can be safely, effectively, the Oceanic disasters of economy, the comprehensive such big scale of improvement.Can reduce four big types with disclosed technology: chemistry is killed method, biological restraint method, physical removal method and flocculation sedimentation in the past.It is not strong that chemistry is killed method validity and thoroughness in governance process, and chemical agent for killing itself is forbidden by multinational ENVIRONMENTAL LAW the pollution of environment.Biological process comprises and utilizes mikrobe or virus to kill frustule that this method is difficult to extensively, uses on a large scale owing to reasons such as selectivity restriction, preparation cycle length, cost height.Physical method comprises mechanical removal method, light-operated method for making, supersonic method and electrolytic process.Physics method principle is simple, easy to operate but be only applicable to the higher red tide water of concentration, because the consideration of cost and time consumption and energy consumption is difficult to be applied to the removing of big area marine red tide.Flocculation sedimentation is divided into chemical floc method and natural mineral flocculation agent method.Chemical floc (composite polymeric aluminium, iron, compounds such as Vestolen PP 7052, Vilaterm) great majority have certain toxicity, are difficult to degraded, and a large amount of the input can be disturbed marine natural biological group, destroys the eubiosis, causes aquatic living biological death.At present, have only the clay flocculating settling process to be acknowledged as improvement method the most likely.Though the cost of clay mineral is relatively low, pollute with toxicity also lower,, clay mineral colloidal sol character is poor, cohesion rapidly, to precipitate the frustule ability lower, and the throwing amount is big.Utilize inorganic or the organic modifiers modified clay, though can reduce the dosage of clay greatly, the removal ability to red tide plankton after the different clay mineral modifications is different.And clay belongs to allogenic material to Yu Haiyang; Chinese scholars is generally worried it and is added the influence of meeting initiation to ocean environment in a large number; Moreover the expense of from the inland to the ocean, gathering and transporting clay is all quite high, and the treatment cost problem has also hindered this method and used on a large scale.
Along with the increasingly stringent that water environment protection is required, since the nineties in 20th century, risen great interest in the world wide to the natural macromolecule flocculating agent research and development, Japan, Korea S and the U.S. become the major country in this field of research.Japan will just test the field and carried out extensive clay sprinkling experiment on deer island at the beginning of the end of the year 80 of 20th century, prove that clay can remove algae, and can not exert an influence to fish.The nineties, Korea S's successful use kaolin families clay mineral is removed the cochlodinium sp red tide.The U.S. discovers that to the flocculation ability of 26 kinds of natural clay minerals the differed clay mineral flocculation ability is different, and goes to different its flocculation abilities of red tide algae also variant.Domestic; At present disclosed in order to the flocculating settling method of administering red tide in; Propositions such as Yu Zhiming utilize the white clay of inorganic flocculating agent and peroxide modified administer the method for red tide and wawter bloom (application number: 200510045789.3), though this method can effectively be removed the red tide algae; White clay is dropped into the ocean as industrial residue, and there is hidden danger in its ecological security.Also have the investigator to propose to use separately the bio-surfactant sophorolipid; With the method (application number: 200510046239.3) that utilizes its modified clay mineral removal red tide; This method algae of not only can effectively flocculating, but also can suppress, kill algae, final cracking frustule; But because the restriction of sophorolipid production technique, this method is not also promoted on a large scale.In addition; Also have through agricultural by-products corn cob meal and organic the mixing using the method (application number: 200610155892.8) of processing composite flocculation agent removal red tide plankton with inorganic flocculating agent; But this method only is confined to test desk research, and spraying effect in ocean is not appeared in the newspapers on a large scale.The inventor at first proposes the modified clay flocculation technique is applied to fresh water bloom governing problem (English Patent GB2337749 at home; CN1417136; CN1418825); And; Utilize chitosan and derivative modified after clay mineral obtaining good result aspect marine red tide and the fresh water bloom administering; Make the dosage of clay mineral be reduced to minimum quantity (10mg/l) since the dawn of human civilization, and clay mineral kind is expanded to local soil, and solved modified clay and remove the problem (application number: 02155284.3 that the algae ability receives the clay types restriction; 01134528.4).But the high salinity characteristic of seawer system might hinder its " bridge formation " characteristic of natural macromolecule flocculating agent performance, so the investigator more and more is inclined to itself and inorganic flocculating agent are worked in coordination with use, learns from other's strong points to offset one's weaknesses, and more effectively administers red tide.Therefore; Seek one or several efficient, nontoxic, as to be prone to degraded natural polymers or inorganic mineral flocculation agents efficient, economic, that be easy to get; Modified clay is extended to the modification sand, and particularly modification ocean bank sand provides a new direction again for researching and developing the method for administering red tide; Yet this series products does not also appear in the newspapers at present.
Summary of the invention
The purpose of this invention is to provide a kind of modification sand that utilizes and administer the biological method of marine red tide, specifically, this method is by the synergistic effect of natural polymers and inorganic polymer flocculant; Sand is carried out modification, between the emergence period, add modification sand flocculation agent to the red tide water surface at red tide; Rapid flocculation sedimentation red tide plankton; The efficient harmful algae of removing is effectively controlled spreading and taking place of red tide, can not cause ocean environment and disturb and destruction.
According to an aspect of the present invention, described natural polymers is characterized in that, is one or more of chitin and verivate, chitosan and verivate thereof, and it extracts the crust from hydrocoles, and is natural, nontoxic, ecological security, readily biodegradable.
Described inorganic polymer flocculant; It is characterized in that; Be inorganic flocculating agent Poly aluminum Chloride (PAC) (PAC); It has characteristics such as consumption is few, efficient is high, sedimentation is fast, water purification performance is good, and its auxiliary natural polymers is strengthened the throwing out that the bridge formation net is caught, and strengthens the salt resistance of natural polymers in seawer system.
Described sand; It is characterized in that; Be selected from the fine sand particle that ocean bank, beach, sand dune perhaps are derived from river sand, desert or sandy soil, its composition can be one or several in the chiltern mineral such as silicon-dioxide, shell fragment, beach rock, Irish touchstone gravel, silica sand, nighttide sand or calcareous sand.
Described method of modifying is characterized in that, the properties-correcting agent of sand is the collaborative use of natural polymers and inorganic polymer flocculant, learns from other's strong points to offset one's weaknesses, and improves the usefulness of flocculation agent in seawater.When separately using natural polymers, when dosage during at 1～50mg/l, the clearance of red tide frustule can reach 53.0%～99.6%; When independent use inorganic polymer flocculant; When dosage during at 1～30mg/l, the clearance of red tide frustule can reach 38.7%～99.4%, and collaborative when using two kinds of flocculation agents; When the properties-correcting agent dosage was merely 10mg/l, the clearance of red tide frustule all can reach more than 90%.The quality percentage composition of natural polymers is 0.1%-10% in the modification sand flocculation agent, and the quality percentage composition of inorganic polymer flocculant is 0.1%-10%, and the quality percentage composition of sand is 80%-99.8%.
Described addition method is characterized in that, between the emergence period, modification sand flocculation agent is sprayed at the red tide water surface with artificial or machinery at red tide, makes it to flocculate with red tide plankton immediately, rapidly and efficiently removes red tide plankton.
According to a further aspect in the invention; A kind of method that red tide spreads and takes place of controlling is provided; It is characterized in that, utilize the synergistic effect of natural polymers and inorganic polymer flocculant, make the modification sand become a kind of natural, safety, economy, efficiently administer the composite flocculation agent of red tide.On the one hand; Compare with clay mineral; Sand is as the important component part of Marine ecosystems, to the marine eco-environment influence and disturbance littler, on the other hand; Inorganic polymer flocculant is collaborative has strengthened natural polymers salt resistance and flocculating effect in ocean water body, and natural polymers greatly reduces the escape of shaking off of motility red tide plankton again.Therefore, this method can effectively be controlled spreading of red tide and take place.
Description of drawings
Fig. 1 is the strong anterior canal algae of modification sea sand flocculating settling
Fig. 2 is a modification sea sand flocculating settling ocean chlorella
Fig. 3 is the strong anterior canal algae of modification silica sand flocculating settling
Fig. 4 is a modification silica sand flocculating settling ocean chlorella
Embodiment
Give further detailed explanation through embodiment to technology of the present invention below.
The strong anterior canal algae of embodiment 1 modified synergic sea sand flocculating settling
Utilize 10mg/L chitosan and 10mg/L Poly aluminum Chloride (PAC), the sea sand of 100mg/L is carried out modification.The effect of the strong anterior canal algae of modification sea sand flocculating settling is as shown in Figure 1, compares with blank assay, use separately sea sand flocculation remove the algae ability a little less than; Behind the 4h; The clearance of strong anterior canal algae is merely 26%, and blank assay is 23%, and the sea sand of modified synergic then has very strong flocculation and removes the algae ability; Behind the flocculating settling 3min, the clearance of algae is up to 80%; Behind the 4h, the clearance of algae reaches 97%.
Embodiment 2 modified synergic sea sand flocculating settling ocean chlorellas
Utilize 10mg/L chitosan and 10mg/L Poly aluminum Chloride (PAC), the sea sand of 100mg/L is carried out modification.The effect of modification sea sand flocculating settling ocean chlorella is as shown in Figure 2, compares with blank assay, and almost flocculation is not except that the algae ability to use sea sand separately, and behind the 4h, the clearance of ocean chlorella is merely 8%, and blank assay is 5%.But the sea sand of modified synergic has very strong flocculation and removes the algae ability, and behind the flocculating settling 3min, the clearance of algae is up to 81%; Behind the 4h, the clearance of algae reaches 90%.
The strong anterior canal algae of embodiment 3 modified synergic silica sand flocculating settlings
Utilize 10mg/L chitosan and 10mg/L Poly aluminum Chloride (PAC), the silica sand of 100mg/L is carried out modification.The effect of the strong anterior canal algae of modification silica sand flocculating settling is as shown in Figure 3, compares with blank assay, use separately silica sand flocculation remove the algae ability a little less than, behind the 4h, the clearance of strong anterior canal algae is merely 25%, blank assay is 23%.But the silica sand of modified synergic has stronger flocculation and removes the algae ability, and behind the flocculating settling 3min, the clearance of algae is up to 80%; Behind the 4h, the clearance of algae reaches 96%.
Embodiment 4 modified synergic silica sand flocculating settling ocean chlorellas
Utilize 10mg/L chitosan and 10mg/L Poly aluminum Chloride (PAC), the silica sand of 100mg/L is carried out modification.The effect of modification silica sand flocculating settling ocean chlorella is as shown in Figure 4, compares with blank assay, and almost flocculation is not except that the algae ability to use silica sand separately, and behind the 4h, the clearance of algae is merely 6%, and blank assay is 5%.And the silica sand of modified synergic has stronger flocculation except that the algae ability, and behind the flocculating settling 3min, the clearance of algae is up to 85%; Behind the 4h, the clearance of algae reaches 93%.
Claims (5)
1. method of utilizing the modification sand to administer marine red tide; It is characterized in that; Utilize the surface of nontoxic, harmless high molecular polymer modifier modification sand, thereby make the sand flocculation agent be able to efficient flocculating sedimentation seawater algal tufa, reach safety, economical, efficiently administer the purpose of marine red tide.
2. the method for claim 1; Wherein said sand is characterised in that; Sand is selected from ocean bank, beach, sand dune or is derived from the fine sand particle of river sand, desert or sandy soil, and its composition can be one or several in the chiltern mineral such as silicon-dioxide, shell fragment, beach rock, Irish touchstone gravel, silica sand, nighttide sand or calcareous sand.
3. the method for claim 1; Wherein said properties-correcting agent is characterised in that; Utilize readily biodegradable natural polymers chitosan and verivate, chitin and verivate thereof one or several and inorganic macromolecule flocculant poly aluminum chloride (PAC) is collaborative uses with the modification sand, to reach the purpose that makes natural polymers effective anti-salt and efficient flocculating in seawater.
4. like claim 1 and 3 described methods; It is characterized in that; Modification sand flocculation agent mixes stirring by natural polymers, inorganic polymer flocculant with sand according to a certain percentage, the collaborative use, and wherein the quality percentage composition of natural polymer is 0.1%-10%; The quality percentage composition of inorganic flocculating agent is 0.1%-10%, and the quality percentage composition of sand is 80%-99.8%.
5. the method for claim 1 is characterized in that, modification sand flocculation agent is sprayed at the red tide water surface, makes it to flocculate with red tide plankton immediately, removes red tide plankton fast.
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| CN2010102145223A CN102311161A (en) | 2010-07-01 | 2010-07-01 | Method for treating red tide by using sand |
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| CN2010102145223A CN102311161A (en) | 2010-07-01 | 2010-07-01 | Method for treating red tide by using sand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368816A (en) * | 2021-12-27 | 2022-04-19 | 中南水务科技有限公司 | Natural polymer algaecide and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418825A (en) * | 2002-12-12 | 2003-05-21 | 中国科学院生态环境研究中心 | High efficiency algae flooculation agent, method for treating red tide and plakton bloom using same |
| CN1541952A (en) * | 2003-11-10 | 2004-11-03 | 中国科学院生态环境研究中心 | Technique for harnessing water bloom and bed mud secondary pollution using lake sediment |
| CN1323035C (en) * | 2004-10-19 | 2007-06-27 | 殷肇君 | Method for cleaning out blue algae of water area |
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2010
- 2010-07-01 CN CN2010102145223A patent/CN102311161A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418825A (en) * | 2002-12-12 | 2003-05-21 | 中国科学院生态环境研究中心 | High efficiency algae flooculation agent, method for treating red tide and plakton bloom using same |
| CN1541952A (en) * | 2003-11-10 | 2004-11-03 | 中国科学院生态环境研究中心 | Technique for harnessing water bloom and bed mud secondary pollution using lake sediment |
| CN1323035C (en) * | 2004-10-19 | 2007-06-27 | 殷肇君 | Method for cleaning out blue algae of water area |
Non-Patent Citations (1)
| Title |
|---|
| 陈静: "改性当地岸沙治理有害赤潮的研究", 《中国科学院烟台海岸带研究所机构知识库博士学位论文》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368816A (en) * | 2021-12-27 | 2022-04-19 | 中南水务科技有限公司 | Natural polymer algaecide and application thereof |
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Application publication date: 20120111 |