CN106861622A - A kind of water treatment agent for processing eutrophication water - Google Patents

A kind of water treatment agent for processing eutrophication water Download PDF

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Publication number
CN106861622A
CN106861622A CN201710210485.0A CN201710210485A CN106861622A CN 106861622 A CN106861622 A CN 106861622A CN 201710210485 A CN201710210485 A CN 201710210485A CN 106861622 A CN106861622 A CN 106861622A
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treatment agent
water treatment
biomass
water
metal salt
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CN201710210485.0A
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Chinese (zh)
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CN106861622B (en
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尹倩倩
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华北电力大学(保定)
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00Aspects relating to sorbent materials
    • B01J2220/40Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48Sorbents characterised by the starting material used for their preparation
    • B01J2220/4812Sorbents characterised by the starting material used for their preparation the starting material being of organic character
    • B01J2220/4825Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton

Abstract

This application provides a kind of water treatment agent for processing eutrophication water, it is obtained in the following manner:A) biomass material, the biomass material after being processed are impregnated using metal salt solution;B) heat up the biomass material after the treatment pyrolysis under anoxic or oxygen free condition, obtains water treatment agent;The biomass material is one or more in agricultural crop straw, timber and shuck.Using water treatment agent of the invention, the various eutrophy ions in eutrophication water effectively can be simultaneously removed;In addition, water treatment agent of the invention can also improve the removal effect to single rich nitrogen or rich phosphorus nutrition element;And, water treatment agent preparation of the invention is simple, be conducive to large-scale production and application.

Description

A kind of water treatment agent for processing eutrophication water

Technical field

The present invention relates to water-treatment technology field, more particularly to a kind of water treatment agent for processing eutrophication water.

Background technology

Eutrophication is a kind of contaminated principal mode of water body, is primarily referred to as under the influence of mankind's activity, some envelopes Close waters and receive macronutrient (such as ammonia nitrogen, nitrate nitrogen and phosphorus), so that exceeded the self-purification capacity of water body, so as to cause Algae and other planktonic organism excessive multiplications, water body dissolved oxygen amount are reduced, transparency reduction, and then cause water ecosystem function The phenomenon that hindered or even destruction deteriorates.China river, lake pollution constantly aggravate, eutrophication particularly problematic and It is increasingly serious, therefore, how to alleviate or overcome the problem of body eutrophication to turn into focus of concern.

At present, administer and the method for control body eutrophication mainly has chemical method, Physical, physico-chemical process and bioanalysis. Wherein, in Physical absorption method process is simple, it is reliable, can both have been used as single governing measure, also can be with life Thing method is used in combination, as the common method for administering eutrophication water, and in recent years, both at home and abroad on using absorption method treatment The research of eutrophication water is also more and more.The active charcoal of adsorbent, zeolite, diatomite commonly used at present etc., although above-mentioned Adsorbent has the advantages that adsorption capacity is big, but its expensive, service life is short, operating cost is high.Therefore, seek or grind One of the main R&D direction of hair advantages of good adsorption effect and cheap adsorbent as this area.

In recent years, it is thus proposed that process eutrophication water using charcoal.Charcoal is biomass in anoxic or few oxygen Under the conditions of, by the solid product that pyrolytic charing is obtained, it has substantial amounts of pore structure, and cheap, is expected As a kind of new adsorbent of eutrophication water.But, application of the current charcoal in terms of eutrophy element is adsorbed is ground Study carefully still in the starting stage, it is also immature as the technology of eutrophication water inorganic agent by the use of charcoal.Actual eutrophy Be often that nitrogen and P elements are a large amount of in water body to coexist, and current research is limited only to utilize charcoal to single rich nitrogen or Rich P elements removal, it is difficult to suitable for the treatment of the eutrophication water of nitrogen phosphorus mixing.

The content of the invention

In view of this, it is an object of the present invention to provide it is a kind of process eutrophication water water treatment agent, can not only Remove single eutrophy element, additionally it is possible to effectively remove the rich nitrogen and rich phosphorus nutrition element in eutrophication water simultaneously.

The invention provides a kind of water treatment agent for processing eutrophication water, the water treatment agent is obtained in the following manner :

A) biomass material, the biomass material after being processed are impregnated using metal salt solution;

B) heat up the biomass material after the treatment pyrolysis under anoxic or oxygen free condition, obtains water treatment agent;

The biomass material is one or more in agricultural crop straw, timber and shuck.

Preferably, the metal salt solution be magnesium chloride solution, liquor alumini chloridi, calcium chloride solution, ferric chloride solution and One or more in solution of ferrous chloride.

Preferably, the concentration of the metal salt solution is 0.5~3.0mol/L.

Preferably, the quality of the biomass material and the volume ratio of metal salt solution are 1g:(6~20) mL.

Preferably, the biomass material includes maize straw, cotton stalk, soybean stalk, sesame stalk, poplar, Chinese scholartree Wood and walnut shell in one or more.

Preferably, in the step b), the intensification pyrolytic process includes:Heated up with the heating rate of 5~10 DEG C/min To 300~700 DEG C, 0.5~6h is incubated;

The anoxic or oxygen free condition are the condition that nitrogen is present, and the flow velocity of the nitrogen is 100~600mL/min.

Preferably, in the step a), before impregnating biomass material using metal salt solution, first biomass material is washed Only, dry and crush;

The temperature of the drying is 50~150 DEG C, and the time is 5~24h;

The granularity of the crushing is 0.5~3mm;

After using metal salt solution dipping biomass material, also include:By the biomass material after dipping in 50~120 6~48h, after the drying, the biomass material after being processed are dried at DEG C.

Preferably, in the step b), the biomass material after by the treatment heats up under anoxic or oxygen free condition After pyrolysis, also include:By the product washing after pyrolysis, dry and crushing, after the crushing, obtain water treatment agent;

The dry temperature is 40~80 DEG C, and the time is 4~24h;

The granularity of the crushing is below 0.25mm.

Preferably, the specific surface area of the water treatment agent is 2~500m2/g。

Preferably, the surface functional group of the water treatment agent includes alkyl, hydroxyl, carboxyl, phenolic hydroxyl group, carbonyl and lactone group In one or more.

The invention provides a kind of water treatment agent for processing eutrophication water, it is obtained in the following manner:A) utilize Metal salt solution impregnates biomass material, the biomass material after being processed;B) biomass material after the treatment is existed Heat up pyrolysis under anoxic or oxygen free condition, obtains water treatment agent;The biomass material is agricultural crop straw, timber and shuck In one or more.Using water treatment agent of the invention, the various rich battalion in eutrophication water effectively can be simultaneously removed Ion is supported, breaks the limitation that conventional adsorbent is typically only capable to the single rich nitrogen of adsorbing and removing or rich phosphorus nutrition element;In addition, of the invention Water treatment agent can also improve removal effect to single rich nitrogen or rich phosphorus nutrition element;And, water treatment agent system of the invention It is standby simple, be conducive to large-scale production and application.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis The accompanying drawing of offer obtains other accompanying drawings.

Fig. 1 is the examination of infrared spectrum spectrogram that the embodiment of the present application 10 is provided.

Specific embodiment

The invention provides a kind of water treatment agent of eutrophication water, it is characterised in that the water treatment agent by with Under type is obtained:

A) biomass material, the biomass material after being processed are impregnated using metal salt solution;

B) heat up the biomass material after the treatment pyrolysis under anoxic or oxygen free condition, obtains water treatment agent;

The biomass material is one or more in agricultural crop straw, timber and shuck.

The water treatment agent that the present invention is provided is obtained by above-mentioned specific preparation method, using water treatment agent of the invention, Effectively can simultaneously remove the various eutrophy ions in eutrophication water;In addition, water treatment agent of the invention can also be improved To single rich nitrogen or the removal effect of rich phosphorus nutrition element;And can be seen that water treatment agent of the invention prepare it is simple, be conducive to Large-scale production and application.

According to the present invention, biomass material, the biomass material after being processed are impregnated first with metal salt solution.

In the present invention, the biomass material that the biomass material is well known in the art, preferably agricultural crop straw, timber With one or more in shuck, more preferably including maize straw, cotton stalk, soybean stalk, sesame stalk, poplar, Chinese scholartree Wood and walnut shell in one or more.

In the present invention, before biomass material is impregnated, preferably biomass material is cleaned, dried and crushed;The drying Temperature be preferably 50~150 DEG C;The time of the drying is preferably 5~24h;The granularity of the crushing is preferably 0.5~ 3mm。

In the present invention, the metal salt solution used by dipping biomass material is preferably magnesium chloride solution, liquor alumini chloridi, chlorine Change one or more in calcium solution, ferric chloride solution and solution of ferrous chloride.In the present invention, the concentration of the metal salt solution Preferably 0.5~3.0mol/L;In the range of the impregnation concentrations, the adsorption activity position of abundance is conducive to provide, less than the model The dipping of metal salt solution is enclosed or is unfavorable for beyond the scope, the adsorption capacity of influence gained water treatment agent is unfavorable for richness The absorption of nutrient.

In the present invention, when impregnating biomass material using metal salt solution, the quality and slaine of the biomass material The volume ratio of solution is preferably 1g:(6~20) mL, more preferably 1g:(7~10) mL;In the range of the usage ratio, can Good dipping effect is produced, metal salt solution is reached best combination effect with biomass material, raw material wave is not resulted in also Take.In the present invention, the time of the dipping is preferably 1~10h.

In the present invention, after using metal salt solution dipping biomass material, preferably also include:By the biomass after dipping Raw material drying;In the present invention, the dry temperature is preferably 50~120 DEG C;The dry time is preferably 6~48h, After the drying, the biomass material after being processed.

According to the present invention, after the biomass material after being processed, by the biomass material after the treatment in anoxic Or the pyrolysis that heated up under oxygen free condition, obtain water treatment agent.

In the present invention, the anoxic or oxygen free condition are preferably the condition that nitrogen is present, and the flow velocity of the nitrogen is preferably 100~600mL/min.

In the present invention, the intensification pyrolytic process is preferably included:300 are warming up to the heating rate of 5~10 DEG C/min~ 700 DEG C and 0.5~6h of insulation.Under the intensification pyrolytical condition, can obtain at the water that pore structure is flourishing, functional group is abundant Reason agent.In addition, the present invention is conducive to making metal oxide firmly embedding using being pyrolyzed again after metal salt solution dipping biomass material Enter in biomass carbon skeleton, do not fallen off with aqueous solution Long Term Contact, be conducive to improving adsorption activity.

In the present invention, the biomass material after by the treatment heats up after pyrolysis under anoxic or oxygen free condition, preferably Also include:By the product washing after pyrolysis, dry and crushing.In the present invention, the washing cleaning solution is preferably deionized water. In the present invention, the dry temperature is preferably 40~80 DEG C, and the time is preferably 4~24h.In the present invention, the grain of the crushing Degree is preferably below 0.25mm, more preferably below 0.2mm;After above-mentioned post processing, water treatment agent is obtained.

In the present invention, the specific surface area of gained water treatment agent is preferably 2~500m2/ g, more preferably 200~400m2/g。 In the present invention, the surface functional group of gained water treatment agent is preferably included in alkyl, hydroxyl, carboxyl, phenolic hydroxyl group, carbonyl and lactone group One or more.

In the present invention, when processing eutrophic water body using the water treatment agent, can perform in the following manner:By water process Agent mixes with eutrophic water body, concussion.In the present invention, the time of the concussion is preferably 0.25~48h, more preferably 36h;Institute The temperature for stating processing procedure is preferably 10~40 DEG C, more preferably 25 DEG C.

The invention provides a kind of water treatment agent, it passes through above-mentioned specific preparation method and obtains, using water of the invention Inorganic agent, effectively can simultaneously remove the various eutrophy ions in eutrophication water;In addition, water treatment agent of the invention is also The removal effect to single rich nitrogen or rich phosphorus nutrition element can be improved;And can be seen that water treatment agent of the invention prepare it is simple, Be conducive to large-scale production and application.

The universal law acted on according to other field materials is derived, if certain adsorbent can remove single rich nitrogen water body, Also single rich-phosphorus water body can be removed, being then expected can remove the nitrogen P elements of the eutrophic water body of rich nitrogen richness phosphorus simultaneously;Or Person, if certain adsorbent can remove single rich nitrogen water body, another adsorbent can remove single rich-phosphorus water body, then two kinds The composition of adsorbent is then expected can be while remove the nitrogen P elements of the eutrophic water body of rich nitrogen richness phosphorus simultaneously.However, thing Real really not so, for this area, the principle of the different single eutrophy elements of adsorbent adsorbing and removing is most of also still not It is bright and clear, and remove single eutrophy element and while also do not have between removing various eutrophy elements specific or regular Contact, is not ascertained also at least, therefore, while it is difficult effectively to remove various eutrophy elements technology as this area for a long time Topic.However, studied for a long period of time discovery through applicant, according to water treatment agent obtained in above-mentioned specific preparation method of the invention, can The nitrogen P elements in eutrophication water are effectively removed simultaneously, have been broken conventional inorganic agent and have been typically only capable to the single rich nitrogen of adsorbing and removing Or the limitation of rich phosphorus nutrition element, for the treatment of actual eutrophication water provides effective solution;In addition, of the invention Water treatment agent can also improve the removal effect to single rich nitrogen or rich phosphorus nutrition element, i.e., to the treatment of single eutrophication water Also generate and be obviously improved effect;And, the preparation method of water treatment agent of the invention is simple, and low energy low consumption makes actual production Process is simple and easy to do, is conducive to actual large-scale production;In addition, the present invention be with it is with low cost, abandoned with form of waste more Biomass be raw material, alleviate carrying capacity of environment, realize the efficient utilization of resource.

For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, but It should be appreciated that these descriptions are simply to further illustrate the features and advantages of the present invention, rather than to the claims in the present invention Limitation.

Comparative example 1

Soybean stalk biomass material is chosen, is cleaned after 24h is dried in 60 DEG C of baking ovens, be crushed to granularity for 2mm.By powder Biomass material after broken is placed in tube furnace, and holding nitrogen flow rate is 200mL/min, is risen to the heating rate of 5 DEG C/min 500 DEG C, insulation pyrolysis 2h obtains charcoal.Gained charcoal is washed with deionized to neutrality after baking in 60 DEG C of baking ovens Dry 10h, and granularity is crushed to less than 0.2mm, obtain water treatment agent.

Embodiment 1

Soybean stalk biomass material is chosen, is cleaned after 24h is dried in 60 DEG C of baking ovens, be crushed to granularity for 2mm.By powder Biomass material after broken impregnated in the MgCl that concentration is 2mol/L2In solution, impregnating ratio is 1g:7mL, after dipping 3h, 80 36h is dried at DEG C, the biomass material after being processed.Biomass material after treatment is placed in tube furnace, nitrogen is kept Flow velocity is 200mL/min, and 500 DEG C are risen to the heating rate of 5 DEG C/min, and insulation pyrolysis 2h obtains water treatment agent precursor.By institute Water treatment agent precursor is washed with deionized to neutrality after drying 10h in 60 DEG C of baking ovens, and be crushed to granularity and be less than 0.2mm, obtains water treatment agent.

Embodiment 2

Soybean stalk biomass material is chosen, is cleaned after 24h is dried in 90 DEG C of baking ovens, be crushed to granularity for 2mm.By powder Biomass material after broken impregnated in the AlCl that concentration is 2mol/L3In solution, impregnating ratio is 1g:7mL, after dipping 3h, 80 48h is dried at DEG C, the biomass material after being processed.Biomass material after treatment is placed in tube furnace, nitrogen is kept Flow velocity is 200mL/min, and 500 DEG C are risen to the heating rate of 5 DEG C/min, and insulation pyrolysis 2h obtains water treatment agent precursor.By institute Water treatment agent precursor is washed with deionized to neutrality after drying 10h in 60 DEG C of baking ovens, and be crushed to granularity and be less than 0.2mm, obtains water treatment agent.

Embodiment 3

Soybean stalk biomass material is chosen, is cleaned after 24h is dried in 60 DEG C of baking ovens, be crushed to granularity for 2mm.By powder Biomass material after broken impregnated in the MgCl that concentration is 2mol/L2And AlCl3In mixed solution, impregnating ratio is 1g:7mL, leaching After stain 3h, 36h is dried at 80 DEG C, the biomass material after being processed.Biomass material after treatment is placed in tube furnace In, holding nitrogen flow rate is 200mL/min, and 500 DEG C are risen to the heating rate of 5 DEG C/min, and insulation pyrolysis 2h obtains water process Agent precursor.Gained water treatment agent precursor is washed with deionized to neutrality after drying 10h in 60 DEG C of baking ovens, and is crushed to grain Degree is less than 0.2mm, obtains water treatment agent.

Embodiment 4

Soybean stalk biomass material is chosen, is cleaned after 24h is dried in 60 DEG C of baking ovens, be crushed to granularity for 2mm.By powder Biomass material after broken impregnated in the MgCl that concentration is 1mol/L2In solution, impregnating ratio is 1g:15mL, after dipping 3h, 80 36h is dried at DEG C, the biomass material after being processed.Biomass material after treatment is placed in tube furnace, nitrogen is kept Flow velocity is 400mL/min, and 600 DEG C are risen to the heating rate of 8 DEG C/min, and insulation pyrolysis 2h obtains water treatment agent precursor.By institute Water treatment agent precursor is washed with deionized to neutrality after drying 10h in 60 DEG C of baking ovens, and be crushed to granularity and be less than 0.2mm, obtains water treatment agent.

Embodiment 5

Cornstalk biological matter raw material is chosen, is cleaned after 24h is dried in 60 DEG C of baking ovens, be crushed to granularity for 2mm.By powder Biomass material after broken impregnated in the CaCl that concentration is 2mol/L2In solution, impregnating ratio is 1g:7mL, after dipping 3h, 80 36h is dried at DEG C, the biomass material after being processed.Biomass material after treatment is placed in tube furnace, nitrogen is kept Flow velocity is 200mL/min, and 500 DEG C are risen to the heating rate of 5 DEG C/min, and insulation pyrolysis 2h obtains water treatment agent precursor.By institute Water treatment agent precursor is washed with deionized to neutrality after drying 10h in 60 DEG C of baking ovens, and be crushed to granularity and be less than 0.2mm, obtains water treatment agent.

Embodiment 6

Sesame stalk biomass material is chosen, is cleaned after 24h is dried in 60 DEG C of baking ovens, be crushed to granularity for 2mm.By powder Biomass material after broken impregnated in the FeCl that concentration is 2mol/L3In solution, impregnating ratio is 1g:7mL, after dipping 3h, 80 36h is dried at DEG C, the biomass material after being processed.Biomass material after treatment is placed in tube furnace, nitrogen is kept Flow velocity is 200mL/min, and 500 DEG C are risen to the heating rate of 5 DEG C/min, and insulation pyrolysis 2h obtains water treatment agent precursor.By institute Water treatment agent precursor is washed with deionized to neutrality after drying 10h in 60 DEG C of baking ovens, and be crushed to granularity and be less than 0.2mm, obtains water treatment agent.

Embodiment 7

Walnut shell biomass material is chosen, is cleaned after 24h is dried in 60 DEG C of baking ovens, be crushed to granularity for 2mm.To crush Biomass material afterwards impregnated in the FeCl that concentration is 2mol/L2In solution, impregnating ratio is 1g:7mL, after dipping 3h, at 80 DEG C Lower drying 36h, the biomass material after being processed.Biomass material after treatment is placed in tube furnace, nitrogen stream is kept Speed is 200mL/min, and 500 DEG C are risen to the heating rate of 5 DEG C/min, and insulation pyrolysis 2h obtains water treatment agent precursor.By gained Water treatment agent precursor is washed with deionized to neutrality after drying 10h in 60 DEG C of baking ovens, and is crushed to granularity less than 0.2mm, Obtain water treatment agent.

Embodiment 8

Poplar biomass material is chosen, is cleaned after 24h is dried in 60 DEG C of baking ovens, be crushed to granularity for 2mm.After crushing Biomass material impregnated in concentration be 2mol/L FeCl3In solution, impregnating ratio is 1g:7mL, after dipping 3h, at 80 DEG C Drying 36h, the biomass material after being processed.Biomass material after treatment is placed in tube furnace, nitrogen flow rate is kept It is 200mL/min, 500 DEG C is risen to the heating rate of 5 DEG C/min, insulation pyrolysis 2h obtains water treatment agent precursor.By gained water Inorganic agent precursor is washed with deionized to neutrality after drying 10h in 60 DEG C of baking ovens, and is crushed to granularity less than 0.2mm, is obtained To water treatment agent.

Embodiment 9

Specific surface area and pore structure study are carried out to the water treatment agent in comparative example 1 and embodiment 1~8, as a result referring to table 1.Wherein, pore property analysis uses N2Physisorphtion is tested;Specific surface area is to test to inhale under the conditions of liquid nitrogen 77K Attached desorption isotherm is simultaneously calculated using BET models.

The comparative example 1 of table 1 and the specific surface area and pore structure of the sewerage disposing agent of embodiment 1~8

Aperture (nm) Comparative example 1 134.09 0.069 2.05 Embodiment 1 291.08 0.275 3.78 Embodiment 2 361.93 0.265 2.92 Embodiment 3 307.70 0.219 2.84 Embodiment 4 335.24 0.235 2.88 Embodiment 5 286.12 0.257 3.02 Embodiment 6 289.54 0.268 3.51 Embodiment 7 316.35 0.225 2.89 Embodiment 8 305.46 0.208 2.59

As can be seen from Table 1, compared to the water treatment agent of comparative example 1, water treatment agent of the invention has bigger ratio table Area and pore volume, can provide the space of abundance for absorption, be conducive to improving the absorption to eutrophy element in eutrophic water body Ability.

Embodiment 10

Examination of infrared spectrum is carried out to the water treatment agent in comparative example 1 and embodiment 1~3, the table of each water treatment agent is analyzed Face functional group, as a result as shown in Figure 1.In Fig. 1,3000~3600cm-1Absworption peak belong to hydroxyl (- OH), 1600cm-1Near Absworption peak belong to carbonyl (C=O), 1400cm-1Neighbouring absworption peak belongs to alkyl (- CH2), 1000cm-1Neighbouring absworption peak Belong to methoxyl group (- OCH2).From figure 1 it appears that compared to the water treatment agent of comparative example 1, the water process of embodiment 1~3 Agent has more rich functional group, its can with adsorbate formed chemical bond or generation complexing, effectively facilitate eutrophy The absorption of element.

Embodiment 11

1st, the water treatment agent treatment for obtaining comparative example 1 and embodiment 1~8 is single rich in ammonia nitrogen Or nitrate nitrogenOr phosphorusEutrophic water body.

Processing procedure:The water treatment agent that comparative example 1 and embodiment 1~8 are obtained respectively with above-mentioned three kinds of single-element richnesses Nutritive water is mixed with the ratio of 2g/L, continuously shakes 36h, and temperature is maintained at 25 DEG C.

It is pending finish after, each inorganic agent is separated with eutrophic water body, using rich battalion after spectrophotometer test processes The content of remaining eutrophy element in water body is supported, so as to be calculated adsorbance of each water treatment agent to various eutrophy elements, Result is referring to table 2.

Adsorption effect of the water treatment agent of the comparative example 1 of table 2 and embodiment 1~8 to single eutrophy element

As can be seen from Table 2, compared to the biomass carbon inorganic agent of comparative example 1, water treatment agent of the invention is to nitrogen, phosphorus unit The Adsorption effect of element is significantly improved, and can realize the efficient removal to single eutrophy element.

2nd, the water treatment agent treatment for obtaining comparative example 1 and embodiment 1~8 is simultaneously rich in ammonia nitrogen Nitrate nitrogenAnd phosphorusEutrophic water body.

Processing procedure:The water treatment agent that comparative example 1 and embodiment 1~8 are obtained is respectively with above-mentioned while rich Nitrogen-and Phosphorus-containing unit The eutrophic water body of element is mixed with the ratio of 2g/L, continuously shakes 36h, and temperature is maintained at 25 DEG C.

It is pending finish after, each inorganic agent is separated with eutrophic water body, using rich battalion after spectrophotometer test processes Support the content of remaining eutrophy element in water body, so as to be calculated each water treatment agent to eutrophy element (ammonia nitrogen, nitrate nitrogen and Phosphorus) adsorbance, as a result referring to table 3.

Adsorption effect of the water treatment agent of the comparative example 1 of table 3 and embodiment 1~8 to mixing eutrophy element

As can be seen from Table 3, in the treatment eutrophic water body of rich nitrogen richness phosphorus simultaneously, the inorganic agent pair of comparative example 1 Adsorbing and removing effect be only 0.1mg/g, it is rightAdsorbing and removing effect be 1.7mg/g, it is seen then that its to phosphorus removal effect compared with Difference, and nitrogen and phosphorus in eutrophic water body almost cannot be simultaneously removed without removal effect, the i.e. inorganic agent of comparative example 1 to nitrogen. The water treatment agent of embodiment 1~8 is respectively provided with good adsorbing and removing effect to the nitrogen and phosphorus in eutrophic water body, can have simultaneously The nitrogen and phosphorus of effect removing eutrophic water body.

The explanation of above example is only intended to help and understands the method for the present invention and its core concept.To these embodiments Various modifications will be apparent for those skilled in the art, generic principles defined herein can be with Without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will not be limited In the embodiments shown herein, and it is to fit to the most wide model consistent with principles disclosed herein and features of novelty Enclose.

Claims (10)

1. it is a kind of process eutrophication water water treatment agent, it is characterised in that the water treatment agent is obtained in the following manner:
A) biomass material, the biomass material after being processed are impregnated using metal salt solution;
B) heat up the biomass material after the treatment pyrolysis under anoxic or oxygen free condition, obtains water treatment agent;
The biomass material is one or more in agricultural crop straw, timber and shuck.
2. water treatment agent according to claim 1, it is characterised in that the metal salt solution is magnesium chloride solution, chlorination One or more in aluminum solutions, calcium chloride solution, ferric chloride solution and solution of ferrous chloride.
3. water treatment agent according to claim 1, it is characterised in that the concentration of the metal salt solution is 0.5~ 3.0mol/L。
4. water treatment agent according to claim 1, it is characterised in that the quality and metal salt solution of the biomass material Volume ratio be 1g:(6~20) mL.
5. water treatment agent according to claim 1, it is characterised in that the biomass material includes maize straw, cotton One or more in stalk, soybean stalk, sesame stalk, poplar, ash and walnut shell.
6. water treatment agent according to claim 1, it is characterised in that in the step b), the intensification pyrolytic process bag Include:300~700 DEG C are warming up to the heating rate of 5~10 DEG C/min, 0.5~6h is incubated;
The anoxic or oxygen free condition are the condition that nitrogen is present, and the flow velocity of the nitrogen is 100~600mL/min.
7. water treatment agent according to claim 1, it is characterised in that in the step a), is impregnated using metal salt solution Before biomass material, first biomass material is cleaned, dried and crushed;
The temperature of the drying is 50~150 DEG C, and the time is 5~24h;
The granularity of the crushing is 0.5~3mm;
After using metal salt solution dipping biomass material, also include:By the biomass material after dipping at 50~120 DEG C Dry 6~48h, after the drying, the biomass material after being processed.
8. water treatment agent according to claim 1, it is characterised in that in the step b), the life after by the treatment Raw material of substance heats up after pyrolysis under anoxic or oxygen free condition, also includes:By the product washing after pyrolysis, dry and crushing, After the crushing, water treatment agent is obtained;
The dry temperature is 40~80 DEG C, and the time is 4~24h;
The granularity of the crushing is below 0.25mm.
9. the water treatment agent according to any one of claim 1~8, it is characterised in that the specific surface of the water treatment agent Product is 2~500m2/g。
10. the water treatment agent according to any one of claim 1~8, it is characterised in that the surface official of the water treatment agent Can group include in alkyl, hydroxyl, carboxyl, phenolic hydroxyl group, carbonyl and lactone group one or more.
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