CN102658090B - Eggshell heavy metal ion adsorbent and preparation method thereof - Google Patents
Eggshell heavy metal ion adsorbent and preparation method thereof Download PDFInfo
- Publication number
- CN102658090B CN102658090B CN201210119055.5A CN201210119055A CN102658090B CN 102658090 B CN102658090 B CN 102658090B CN 201210119055 A CN201210119055 A CN 201210119055A CN 102658090 B CN102658090 B CN 102658090B
- Authority
- CN
- China
- Prior art keywords
- eggshell
- adsorbent
- heavy metal
- eggshells
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention provides an eggshell heavy metal ion adsorbent and a preparation method thereof. The preparation method comprises the following steps: cleaning the concentrated eggshells, soaking the eggshells into NaOH solution with the concentration of 20 percent for 2 to 3 days, and removing intimas from the eggshells, taking out the eggshells, washing the eggshells completely, filtering and drying in a drying box; and placing the dried eggshells into a heat treatment furnace, calcining at the temperature ranging from 750 to 1,200 DEG C for 2 to 4 hours, and cooling to obtain the white powdered eggshell heavy ion adsorbent. The adsorbent has the power size of 40 to 100 meshes. The adsorbent is applicable to treatment on acidic industrial waste water with the pH value of 3 to 6, wherein the adding amount of the adsorbent is 2 to 2.5 g/L.
Description
Technical field
The invention belongs to changing waste into resources utilization and water-treatment technology field, particularly a kind of natural minerals adsorbent for heavy metal and preparation method thereof.
Background technology
Along with the fast development of mining, metal smelt, metal processing, plating, electronics industry etc., consequent heavy metal ion can enter water body by soil, water, air.Industrial wastewater is day by day serious to the harm of natural environment, particularly by food chain, carries out enrichment.As a class noxious material, the heavy metal of trace can produce poisonous effect, and the mankind's health is caused to irreversible harm.How to eliminate the pollution that heavy metal ion brings soil and water resource and become current environmental protection problem anxious to be resolved.Now widely used heavy metal absorbent source is limited, and cost is higher, and preparation method is complicated.Traditional processing method efficiency when concentration of heavy metal ion is lower is not high, and complex process easily causes secondary pollution problems.Conventional adsorbent is if active carbon and ion exchange resin are mostly because expensive or complex manufacturing limit its application.
Along with the fast development of growth in the living standard and food service industry, need to consume a large amount of birds, beasts and eggs.Eggshell, as a kind of discarded object, normally adopts landfill disposal, easily causes serious environmental pollution.The main component of eggshell is calcium carbonate, and it utilizes potentiality very large.The raw material wide material sources of eggshell adsorbent, with low cost, equipment is simple, and handled easily has that adsorption rate is fast, adsorbance is large, good selective.Adopting conventional chemical method just can adsorb the heavy metal ion in industrial wastewater, is a kind of green adsorbent of economic environmental protection.
Summary of the invention
The object of the present invention is to provide a kind of good adsorption performance cheaply, be easy to production and processing and can meet eggshell adsorbent for heavy metal of mass market application requirements and preparation method thereof.
Technical scheme of the present invention is that the eggshell of discarded removal inner membrance is formed through calcining.Its concrete steps are:
(1) concentrate eggshell to clean, and to join concentration be to soak 2～3 days in 20% NaOH solution, except shell breaking inner membrance;
(2) eggshell is taken out and clean, filter, in drying box, be dried;
(3) eggshell is placed in heat-treatment furnace, calcines 2～4 hours at 750-1200 ℃;
(4) the eggshell adsorbent for heavy metal of cooling rear acquisition white powder, its powder size is 40～100 orders.
It is 3～6 acidic industrial effluent that adsorbent provided by the invention is applicable to pH value, and its addition is 2～2.5g/L.
Eggshell adsorbent for heavy metal provided by the invention is added to fully vibration in acidic industrial effluent (pH=3～6) and on oscillator, and the addition of adsorbent is 2～2.5g/L, makes it the heavy metal ion in adsorbent solution, includes but not limited to Cd
2+, Pb
2+, Cu
2+, Ni
2+, Cr
3+and Cr
2+deng, the industrial wastewater after processing changes neutrality into by acidity.
The present invention compared with prior art, its beneficial effect is embodied in: the present invention has utilized the eggshell often going out of use in food production and life to process recycling, the environmental pollution of avoiding the long-term accumulation deposit of eggshell and causing, has solved potential safety hazard and the limited problem of existing adsorbent raw material sources that adsorbent circulates and may exist in market.Because gained adsorbent is Powdered, the contact area of itself and heavy metal ion is obviously increased, improved its adsorption rate within the unit interval.The more important thing is, the powder size of this eggshell adsorbent for heavy metal can be adjusted by calcining heat.Meanwhile, this technical method can carry out mass industrialized production.
Eggshell adsorbent for heavy metal provided by the present invention has stronger adsorption capacity at normal temperatures, preparation method is simple, with low cost, and can not cause secondary pollution, good to the acidic industrial effluent treatment effect that contains heavy metal ion, have broad application prospects and good use value.Not only, for heavy mental treatment in acidic industrial effluent provides a kind of simple and effective method, can also make acidic industrial effluent be neutralized, be conducive to realize the new breakthrough of adsorption technology aspect environmental pollution improvement.
The specific embodiment
The following examples can make the present invention of those of ordinary skill in the art's comprehend, but do not limit the present invention in any way.
Embodiment 1
Discarded object one eggshell of getting in food production and life cleans, and to join concentration be to soak 2～3 days in 20% NaOH solution, except shell breaking inner membrance.Eggshell is taken out and cleaned and filters, then in drying box, be dried.The eggshell of removing inner membrance is placed in heat-treatment furnace, calcines 2 hours at 750 ℃.After cooling, can obtain fineness is 80-100 object powder, i.e. described eggshell adsorbent for heavy metal.
Under 25 ℃ of conditions, the 2.5g eggshell adsorbent for heavy metal that adds the present embodiment to prepare in 1 liter of acidic industrial effluent (pH=3), heavy metal ion Cd
2+, Pb
2+, Cu
2+, Ni
2+deng completely, be adsorbed Cr
3+and Cr
2+adsorption rate be 80%.Meanwhile, acid industrial wastewater is neutralized, and the pH value of waste water after adsorption treatment is 7.
Embodiment 2
Discarded object one eggshell of getting in food production and life cleans, and to join concentration be to soak 2～3 days in 20% NaOH solution, except shell breaking inner membrance.Eggshell is taken out and cleaned and filters, then in drying box, be dried.The eggshell of removing inner membrance is placed in heat-treatment furnace, calcines 3 hours at 1000 ℃.After cooling, can obtain fineness is 60-75 object powder, i.e. described eggshell adsorbent for heavy metal.
Under 25 ℃ of conditions, the 2.5g eggshell adsorbent for heavy metal that adds the present embodiment to prepare in 1 liter of acidic industrial effluent (pH=3), heavy metal ion Cd
2+, Pb
2+, Cu
2+, Ni
2+deng completely, be adsorbed Cr
3+and Cr
2+adsorption rate be 82.5%.Meanwhile, acid industrial wastewater is neutralized, and the pH value of waste water after adsorption treatment is 7.
Embodiment 3
Discarded object one eggshell of getting in food production and life cleans, and to join concentration be to soak 2～3 days in 20% NaOH solution, except shell breaking inner membrance.Eggshell is taken out and cleaned and filters, then in drying box, be dried.The eggshell of removing inner membrance is placed in heat-treatment furnace, calcines 4 hours at 1200 ℃.After cooling, can obtain fineness is 40-55 object powder, i.e. described eggshell adsorbent for heavy metal.
Under 25 ℃ of conditions, the 2g eggshell adsorbent for heavy metal that adds the present embodiment to prepare in 1 liter of acidic industrial effluent (pH=3), heavy metal ion Cd
2+, Pb
2+, Cu
2+, Ni
2+deng completely, be adsorbed Cr
3+and Cr
2+adsorption rate be 85%.Meanwhile, acid industrial wastewater is neutralized, and the pH value of waste water after adsorption treatment is 7.
Claims (2)
1. a preparation method for eggshell adsorbent for heavy metal, is characterized in that: by the adjustment of calcining heat, control the granularity of eggshell adsorbent for heavy metal, specifically according to following steps, prepare:
(1) concentrate eggshell to clean, and to join concentration be to soak 2～3 days in 20% NaOH solution, except shell breaking inner membrance;
(2) eggshell is taken out and clean, filter, in drying box, be dried;
(3) eggshell is placed in heat-treatment furnace, calcines 3 hours, or at 1200 ℃, calcine 4 hours at 1000 ℃;
(4) after cooling, can directly obtain respectively granularity is 60～75 orders, or the eggshell adsorbent for heavy metal of 40～55 object white powder.
2. the application of adsorbent in processing acidic industrial effluent as claimed in claim 1, is characterized in that: the addition of described adsorbent is 2～2.5g/L, is applicable to pH value and is 3～6 industrial wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210119055.5A CN102658090B (en) | 2012-04-20 | 2012-04-20 | Eggshell heavy metal ion adsorbent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210119055.5A CN102658090B (en) | 2012-04-20 | 2012-04-20 | Eggshell heavy metal ion adsorbent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102658090A CN102658090A (en) | 2012-09-12 |
| CN102658090B true CN102658090B (en) | 2014-09-03 |
Family
ID=46767747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210119055.5A Active CN102658090B (en) | 2012-04-20 | 2012-04-20 | Eggshell heavy metal ion adsorbent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102658090B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536751A (en) * | 2015-12-12 | 2016-05-04 | 常州大学 | Method for preparing acidic mine waste water adsorption material from waste soybean husks |
| CN106076245B (en) * | 2016-06-13 | 2019-03-29 | 环境保护部南京环境科学研究所 | A kind of preparation method of calcareous kitchen garbage heavy metal absorbent |
| CN106362654B (en) * | 2016-10-08 | 2019-04-02 | 江苏大学 | A kind of method that the Pickering emulsion polymerization technology that magnetism egg-shell meal is stable prepares trace microballoon |
| CN106540649B (en) * | 2016-12-07 | 2019-02-22 | 福州大学 | A kind of green syt of the manganese calcium nano adsorber constructed by egg shell and its application |
| CN106925205A (en) * | 2017-03-14 | 2017-07-07 | 东华理工大学 | A kind of lime-preserved egg shell adsorbent of uranium and its preparation method and application |
| CN108311093A (en) * | 2018-04-17 | 2018-07-24 | 中国农业科学院农业质量标准与检测技术研究所 | A kind of eggshell adsorbent and the preparation method and application thereof |
| CN111252844B (en) * | 2020-02-18 | 2022-01-04 | 四川大学 | Application of eggshell particles in bismuth-containing sewage treatment and use method thereof |
| CN111662725A (en) * | 2020-06-24 | 2020-09-15 | 代彦霞 | Repair material for reducing migration state lead ions in soil and preparation method thereof |
| CN116440866B (en) * | 2023-03-13 | 2023-09-22 | 武汉工程大学 | Preparation method and application of three-dimensional spongy porous heavy metal ion adsorbent based on activated eggshells |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1478594A (en) * | 2003-07-04 | 2004-03-03 | 睿 王 | Preparation method of heavy metal ion adsorbing agent |
-
2012
- 2012-04-20 CN CN201210119055.5A patent/CN102658090B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1478594A (en) * | 2003-07-04 | 2004-03-03 | 睿 王 | Preparation method of heavy metal ion adsorbing agent |
Non-Patent Citations (2)
| Title |
|---|
| PARK Heung Jai1 et al..Removal of heavy metals using waste eggshell.《Journal of Environmental Sciences》.2007,第19卷 |
| Removal of heavy metals using waste eggshell;PARK Heung Jai1 et al.;《Journal of Environmental Sciences》;20070627;第19卷;摘要，第1.1节 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102658090A (en) | 2012-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102658090B (en) | Eggshell heavy metal ion adsorbent and preparation method thereof | |
| CN104525102B (en) | A kind of illite Adsorbent modification method removing heavy metal ions in wastewater | |
| CN102935352B (en) | Method for absorbing and removing heavy metal and hexavalent chromium from waste liquid by using mangosteen slag | |
| CN104355497B (en) | A kind of method processing electroplating wastewater | |
| CN104841685B (en) | To adsorbing or absorbing the method that the plant after heavy metal carries out stabilization processes | |
| CN103432999B (en) | A kind of preparation method of rice straw base chromium ion sorbing material | |
| CN105198030B (en) | A kind of method of chlorion in utilization garlic waste removing water | |
| CN103272566B (en) | Method for preparing ammonia nitrogen adsorbent by using banana peel and application of ammonia nitrogen adsorbent | |
| CN102910760A (en) | Treatment process of contaminated acid containing heavy metals | |
| CN104211225A (en) | Multiple complex treatment method for heavy metal sewage | |
| CN103301811A (en) | preparation method of biomass charcoal adsorbent and method for treating oily wastewater by biomass charcoal adsorbent | |
| CN104045123B (en) | Carboxylated magnetic oxygenated Graphene is utilized to remove cadmic method in waste water | |
| CN101142921A (en) | Zeolite nanometer-zinc-oxide-loaded inorganic inhibiting sulfate reducing bacteria powder and its preparation method | |
| CN103433002B (en) | Preparation method for silver-enriched straw material | |
| CN103011463B (en) | Method for removing zirconium in sewage | |
| CN104028287B (en) | A kind of preparation method of magnesium ferrite/silver phosphate composite photocatalyst | |
| CN107867776B (en) | Method and process for recycling pesticide wastewater | |
| CN202953901U (en) | Water purification device | |
| CN104084131A (en) | Ammonia gas adsorbent modified by virtue of transition metal | |
| CN115806348A (en) | Preparation method of efficient phosphorus removal constructed wetland modified filler | |
| CN102658092B (en) | Method for preparing and applying modified mushroom culture medium waste material heavy metal adsorbent | |
| CN102872822A (en) | Composite adsorption material for removing permanganate acid radicals from water and preparation method of composite adsorption material | |
| CN102188950A (en) | Method for preparing alumina-based porous mineral material | |
| CN105771931A (en) | Reusable sewage treatment adsorbent | |
| CN101120682B (en) | Preparation method of organic powder using tourmaline manganese-supported to inhibit sulfate-reducing-bacteria |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |