CN101497032A - Method for preparing biological sorbent and method of use thereof - Google Patents

Method for preparing biological sorbent and method of use thereof Download PDF

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Publication number
CN101497032A
CN101497032A CNA2009100425547A CN200910042554A CN101497032A CN 101497032 A CN101497032 A CN 101497032A CN A2009100425547 A CNA2009100425547 A CN A2009100425547A CN 200910042554 A CN200910042554 A CN 200910042554A CN 101497032 A CN101497032 A CN 101497032A
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China
Prior art keywords
heavy metal
adsorption agent
biological adsorption
biological
waste water
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CNA2009100425547A
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Chinese (zh)
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彭克俭
周理程
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彭克俭
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Priority to CNA2009100425547A priority Critical patent/CN101497032A/en
Publication of CN101497032A publication Critical patent/CN101497032A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37Wastewater or sewage treatment systems using renewable energies using solar energy

Abstract

The invention discloses a method for preparing a biological adsorbent which can absorb and separate heavy metal ions in waste water and application thereof. The biological adsorbent is prepared from a submerged plant, namely Potamogoton Pectinatus L. by chemical modification. The biological adsorbent can be used for treating heavy metal waste water, purify water polluted by heavy metal, and effectively recover the heavy metal from the waste water, and also has the characteristics of simple preparation, low cost, strong adsorption capability on the heavy metal, and the like. The treated water meets the national comprehensive discharge standard for waste water. The biological adsorbent can be applied in the fields of the treatment of the heavy metal waste water, the restoration of the water polluted by the heavy metal and the like.

Description

A kind of preparation method of biological adsorption agent and application process thereof
Technical field
The present invention relates to the Biosorption of Heavy Metals in Wastewater Treatment field, a kind of preparation method of the biological adsorption agent based on the water plant fennelleaf pondweed herb is provided especially, and use the method that heavy metal in waste water is reclaimed in its absorption.
Background technology
Common process for treating heavy-metal waste water has chemical precipitation method, oxidation-reduction method, ion-exchange, embrane method, biologic treating technique etc.In these methods, chemical precipitation method and oxidation-reduction method etc. also produce secondary pollution when consuming a large amount of chemical agents.Ion-exchange and embrane method etc. then face problems such as the too high and plant maintenance of processing cost.Absorption method is as a kind of important physico-chemical process existing application in heavy metal containing wastewater treatment, and it also can realize the recycling of valuable metal when purifying liquid waste.Adsorption separation technology develop into industrial quarters and the environmental protection field provides a significant opportunity.In recent years, study more adsorbent both at home and abroad and comprise flyash, molecular sieve, active carbon, industrial and agricultural waste or the like, but also be difficult at present realize the adsorption efficiency height simultaneously and cost is cheap, brought many difficulties to industrialization.Therefore, exploitation is cheap, to handle the adsorbent of heavy metal wastewater thereby efficiently necessary.
Fennelleaf pondweed herb is a kind of perennial heavy this plant of pasture and water, has good adaptive capacity to environment, be distributed widely in all over the world, and mainly as fish, the feedstuff of poultry etc.Early-stage Study finds that fennelleaf pondweed herb possesses the ability of adsorbing heavy metal preferably, but also exists adsorption capacity low, and problems such as effluent color dilution height and organic concentration height.
Summary of the invention
One of purpose of the present invention is to provide a kind of preparation simple, with low cost, the preparation method of the biological adsorption agent that counterweight metal adsorption ability is strong.
Another object of the present invention is to provide the method that above-mentioned biological adsorption agent is handled heavy metal wastewater thereby and reclaimed heavy metal in the waste water of using.
The objective of the invention is to adopt following technical proposals to realize: to gather the bright sample of fennelleaf pondweed herb, after drying or drying, be soaked in water and remove the ease of solubility organic matter, expose adsorption site, then with NaCl solution at normal temperatures chemical modification make part adsorption site load sodium ion, strengthen its ion-exchange capacity, behind the NaCl solution modification, clean, drying makes biological adsorption agent.
The NaCl solution that preferred employing concentration is 0.5~2mol/L carries out modification to be handled.4~12h is handled in modification.
Another object of the present invention realizes by following proposal:
Prepared biological adsorption agent and various heavy metal wastewater thereby are joined in the stirred reactor, normal temperature stirs down it is fully mixed, and reaction finishes after screen filtration, and filtrate is returned absorption or discharging, adsorbent is made burning disposal, and the ash content after the burning reclaims heavy metal as biological concentrate.
The concrete application process of the present invention is: the waste water that will contain each heavy metal species joins in the reactor, regulate pH value to 3.5~6.0, add described biological adsorption agent, stirring reaction under normal temperature condition, rely on adsorption site and ion-exchange capacity absorption heavy metal thereof on the adsorbent, to reach the purpose of purifying liquid waste and reclaiming heavy metal.30 ~ 60min is after screen filtration in reaction, and filtrate enters next stage reactor or discharging (decide on its heavy metal residual concentration), and the adsorbent that leaches burns back recovery heavy metal.
Biological adsorption agent concentration is preferably 0.5~6g/L.The adsorption reaction time is 30~60min.
The present invention is suitable for the various Cu that mainly contain 2+, Pb 2+, Zn 2+, Cd 2+Deng heavy metal wastewater thereby.
Technology main equipment: the reactive tank of band agitating device.
Advantage of the present invention and good effect:
(1) with low cost
The biological adsorption agent of being invented is based on a kind of water plant fennelleaf pondweed herb, and this plant belongs to the perennial heavy pasture and water of Potamogetonaceae originally, and vitality is strong, and biomass is very big, extensively distributes in the world, can directly gather from rivers and lakes; Modifier is common NaCl solution, and available industrial sodium chloride is prepared voluntarily; The preparation of adsorbent process can be finished at normal temperatures.Therefore, the preparation cost of biological adsorption agent is very cheap.
(2) high adsorption capacity
To initial concentration is the Cu of 100mg/L 2+, Pb 2+, Zn 2+, Cd 2+Four heavy metal species waste water, once absorption back adsorption rate is respectively up to 96.3%, 97.0%, 91.0%, 99.5%, the maximum adsorption capacity of this four heavy metal species can reach 35.6mg/g, 124.2mg/g, 39.8mg/g, 62.8mg/g respectively under high concentration, is higher than general biological adsorption agent.In addition, for the high heavy metal wastewater thereby of concentration, after the adsorption treatment more than twice, may ultimately reach national sewage comprehensive emission standard.
(3) universality is strong
Biological adsorption agent of the present invention is compared other living body biological adsorbent based on the dead volume plant, does not need any nutrient source that adds, and does not have heavy metal toxicity, and its accommodation is comparatively extensive.
(4) turn waste into wealth
But heavy metal wastewater thereby reuse after the one or many continuous adsorption purifies, the heavy metal accumulation in the waste water to the adsorbent after, can be reclaimed by the form of burning with biological ore in sand form.
(5) simple to operate
Equipment and operation are not all had specific (special) requirements, only need the reactive tank of common band agitating device and carry out simple pH adjusting, each adsorption reaction of taking turns only needs 30~60min to finish.
Characteristics such as in sum, biological adsorption agent of the present invention has with low cost, and counterweight metal adsorption ability is strong and simple to operate can not only be handled heavy metal wastewater thereby, purify the water body that is subjected to heavy metal pollution, can also effectively reclaim the valuable metal in the waste water.This biological adsorption agent can be applicable under the processing and accident condition of heavy metal wastewater thereby, fields such as the emergency processing of surface water pollution.
The specific embodiment
Following examples are intended to illustrate the present invention rather than limitation of the invention further.
Embodiment 1
The Cu that contains to variable concentrations 2+Waste water, initial pH value are 4.0, and the adsorbent consumption is 5g/L, and adsorption time is 60min, and mixing speed is 120r/min, and temperature is 25 ℃, go out water concentration and adsorption rate sees Table 1.
Table 1 biological adsorption agent is to containing Cu 2+The adsorption effect of waste water
Embodiment 2
The Pb that contains to variable concentrations 2+Waste water, initial pH value are 5.0, and the adsorbent consumption is 5g/L, and adsorption time is 60min, and mixing speed is 120r/min, and temperature is 25 ℃, go out water concentration and adsorption rate sees Table 2.
Table 2 biological adsorption agent is to containing Pb 2+The adsorption effect of waste water
Embodiment 3
The Zn that contains to variable concentrations 2+Waste water, initial pH value are 5.0, and the adsorbent consumption is 5g/L, and adsorption time is 60min, and mixing speed is 120r/min, and temperature is 25 ℃, go out water concentration and adsorption rate sees Table 3.
Table 3 biological adsorption agent is to containing Zn 2+The adsorption effect of waste water
Embodiment 4
The Cd that contains to variable concentrations 2+Waste water, initial pH value are 5.0, and the adsorbent consumption is 5g/L, and adsorption time is 60min, and mixing speed is 120r/min, and temperature is 25 ℃, go out water concentration and adsorption rate sees Table 4.
Table 4 biological adsorption agent is to containing Cd 2+The adsorption effect of waste water
Embodiment 5
Initial pH value is respectively 4.0,5.0,5.0,5.0, and initial concentration is respectively 202.1 ± 3.99,200.9 ± 6.35,200.9 ± 6.35,203.0 ± 5.50 Cu 2+, Pb 2+, Zn 2+, Cd 2+Four heavy metal species waste water adopt semicontinuous experiment, continuous adsorption three times, the adsorbent consumption successively decreases successively with the reduction of concentration, is respectively 5g/L, 2g/L, 1g/L, and each adsorption time is 60min, mixing speed is 120r/min, and temperature is 25 ℃, goes out water concentration and sees Table 5 with total adsorption rate.
Table 5 biological adsorption agent is to the semicontinuous adsorption effect of high concentration heavy metal wastewater thereby

Claims (8)

1, a kind of preparation method of biological adsorption agent is characterized in that, gathers the bright sample of fennelleaf pondweed herb, after drying or drying, is soaked in water and removes the ease of solubility organic matter, handles through clean, drying making biological adsorption agent then with the modification at normal temperatures of NaCl solution.
2, the preparation method of a kind of biological adsorption agent according to claim 1 is characterized in that, the concentration of NaCl solution is 0.5~2mol/L.
3, the preparation method of a kind of biological adsorption agent according to claim 1 and 2 is characterized in that, the solid-to-liquid ratio of fennelleaf pondweed herb and NaCl solution is 1:50~1:100g/ml, and wherein fennelleaf pondweed herb is a dry weight.
4, the preparation method of a kind of biological adsorption agent according to claim 1 and 2 is characterized in that, the modification processing time is 4~12h.
5, a kind of application process of biological adsorption agent, it is characterized in that, prepared biological adsorption agent and various heavy metal wastewater thereby are joined in the stirred reactor, normal temperature stirs down it is fully mixed, reaction is finished after screen filtration, filtrate is returned absorption or discharging, and adsorbent is made burning disposal, and the ash content after the burning reclaims heavy metal as biological concentrate.
6, the application process of a kind of biological adsorption agent according to claim 5 is characterized in that, various heavy metal wastewater thereby initial pH value transfer to 3.5~6.0.
7, the application process of a kind of biological adsorption agent according to claim 5 is characterized in that, biological adsorption agent concentration is 0.5~6g/L.
According to the application process of each described a kind of biological adsorption agent of claim 5-6, it is characterized in that 8, the adsorption reaction time is 30~60min.
CNA2009100425547A 2009-01-20 2009-01-20 Method for preparing biological sorbent and method of use thereof Pending CN101497032A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101962308A (en) * 2010-10-20 2011-02-02 常州大学 Method for preparing water-retention fertilizer from aquatic plants
CN102765777A (en) * 2012-07-31 2012-11-07 重庆工商大学 Method for removing cadmium ion from wastewater utilizing wild duckweed biomass
CN103331146A (en) * 2013-07-01 2013-10-02 北京工业大学 Modified bean pulp adsorbent as well as preparation method and application thereof
CN104071860A (en) * 2014-06-20 2014-10-01 杭州蓝天园林生态科技股份有限公司 Restoration method of heavy metal polluted water
CN106179248A (en) * 2016-08-09 2016-12-07 吴迪 A kind of preparation method of mesoporous Herba Potamogetonis Pectinati heavy metal ion adsorbing material
CN113058978A (en) * 2021-03-26 2021-07-02 深圳金普迈生物科技有限公司 Production process of heavy metal mediated biochar compound solidified by silicate

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101962308A (en) * 2010-10-20 2011-02-02 常州大学 Method for preparing water-retention fertilizer from aquatic plants
CN101962308B (en) * 2010-10-20 2013-07-17 常州大学 Method for preparing water-retention fertilizer from aquatic plants
CN102765777A (en) * 2012-07-31 2012-11-07 重庆工商大学 Method for removing cadmium ion from wastewater utilizing wild duckweed biomass
CN103331146A (en) * 2013-07-01 2013-10-02 北京工业大学 Modified bean pulp adsorbent as well as preparation method and application thereof
CN103331146B (en) * 2013-07-01 2015-04-22 北京工业大学 Modified bean pulp adsorbent as well as preparation method and application thereof
CN104071860A (en) * 2014-06-20 2014-10-01 杭州蓝天园林生态科技股份有限公司 Restoration method of heavy metal polluted water
CN106179248A (en) * 2016-08-09 2016-12-07 吴迪 A kind of preparation method of mesoporous Herba Potamogetonis Pectinati heavy metal ion adsorbing material
CN113058978A (en) * 2021-03-26 2021-07-02 深圳金普迈生物科技有限公司 Production process of heavy metal mediated biochar compound solidified by silicate

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