CN1891639A - Method for treating acid heavy metal polluted waste water - Google Patents
Method for treating acid heavy metal polluted waste water Download PDFInfo
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- CN1891639A CN1891639A CN 200510046816 CN200510046816A CN1891639A CN 1891639 A CN1891639 A CN 1891639A CN 200510046816 CN200510046816 CN 200510046816 CN 200510046816 A CN200510046816 A CN 200510046816A CN 1891639 A CN1891639 A CN 1891639A
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- heavy metal
- waste water
- metal polluted
- polluted waste
- acid heavy
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Abstract
This invention relates to a method for processing acid heavy metal pollutant water, which utilizing skins of Chinese chestnuts as adsorbents to process acid heavy metal pollutant water. Advantages: low cost, good result and quick speed to remove infectants.
Description
Technical field
The present invention relates to the processing of acid heavy metal polluted waste water, specifically be used for the removal of acid pollution heavy metal ions in wastewater as sorbent material with a kind of new type natural waste material.
Background technology
During industrial " three wastes " polluted, mining and smelting process were the most important source of pollution that discharge heavy metal in environment, and these source of pollution are point source character mostly; In these point sources, the most common with sewage form discharging heavy metal.Heavy metal not only can not be by biological degradation, and can pass through food chain enrichment in vivo constantly, even can be translated into the bigger compound of toxicity, and some biology in the biologic chain is reached harmful level, finally accumulates in human body and is detrimental to health.After the heavy metal in the soil reached certain content, the growth that also can directly harm the crops caused the underproduction or total crop failure.And excessive heavy metal also has certain toxicity to soil microorganisms, even can cause the decline of species diversity, and soil ecosystem is damaged.
Improvement technology to heavy metal polluted waste water comprises chemical precipitation, membrane filtration, ion-exchange, adsorbents adsorb and precipitation etc.On industrial application, precipitation is to handle the most frequently used method of heavy metal wastewater thereby, but precipitator method water outlet often is difficult to satisfy the emission standard of increasingly stringent, also brings the management and the ultimate disposal problem of precipitating sludge; On the other hand, the precipitator method are undesirable to the low concentration heavy metal water treatment effect.
Summary of the invention
The object of the present invention is to provide the treatment process of the heavy metal polluted waste water that a kind of cost is low, speed is fast, efficient is high, effective.
For achieving the above object, the technical solution used in the present invention is:
The pre-treatment of chestnut skin: in 60-70 ℃ of thermostat container, dry 20-30h grinds, and sieves with the chestnut skin, and it is standby to get 10-40 order particle diameter chestnut skin.
Take by weighing in the above-mentioned chestnut skin 100ml centrifuge tube that sieves of 2.0-4.0g, the compound heavy metal solution (SMS) that adds 50ml pH=1.0-3.0,24h vibrates under room temperature, with mixed solution in the centrifugal 20min of 5000rmp, use the 0.45um membrane filtration, measure heavy metal (cadmium, lead, copper, zinc) content in the filtrate.
The preparation of the compound heavy metal solution of described pH=1.0-3.0: with 0.25mM PbNO
3, CuNO
3, CdNO
3, ZnNO
3Be dissolved in and use 0.1M HNO in the 1L deionized water
3Solution is adjusted to pH1.0-3.0.
Described 0.1M HNO
3The preparation of solution: accurately get the 5.5ml concentrated nitric acid, be settled to 1L with deionized water.
The present invention has following advantage:
1. cost is low.China's Liaoning Area Chinese chestnut cultivated area is bigger, and chestnut peel is a waste, and the source is abundant, and is cheap; Compare with other sorbent materials, the chestnut leatherware has nontoxic, easy acquisition, thing U.S., advantage such as inexpensive.
2. effect is good.The employing chestnut peel is a sorbent material, and it is a physical adsorption process for heavy metal, when the waste water condition during to subacidity scope (pH=3.0), is applicable to cadmium lead, copper, the removal of various heavy pollutents such as zinc at acid (pH=1.0-2.0).The chestnut skin all has bigger loading capacity to Cd, Pb, Zn, Cu four heavy metal species ions; The chestnut skin all has adsorption effect preferably at acid (pH=1.0-2.0) in the subacidity scope (pH=3.0) to Cd, Pb, Zn, Cu four heavy metal species, 10-60 purpose chestnut skin, when addition is 40-80g/L, handles the clearance that clearance that clearance that 10-24h can make the clearance of Cd in the waste water reach 66.52%-92.17%, Pb reaches 98.97%-99.18%, Zn reaches 61.93%-89.74%, Cu and reach 79.31%-94.18%.
3. removal pollutent speed is fast, efficient is high.With the chestnut peel is sorbent material, it is a physical adsorption process for heavy metal for it, the present invention can be used for the Industrial Wastewater Treatment of combined pollutions such as Cd, Pb, Zn, Cu, and it is low to have a cost for practicability this sorbing material of technology and treatment process, and processing speed is fast, advantage such as operation easily.
Embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment 1
In 60 ℃ of thermostat containers of chestnut skin, dry 30h grinds, and sieves, and the chestnut skin of getting 15 order particle diameters is standby.
Take by weighing in the above-mentioned chestnut skin 100ml centrifuge tube that sieves of 4.0g, the compound heavy metal solution (SMS) that adds 50ml pH=1.0, the 24h that under room temperature, vibrates, with mixed solution in the centrifugal 20min of 5000rmp, use the 0.45um membrane filtration, measure heavy metal (cadmium, lead, copper, zinc) content in the filtrate.
The preparation of the compound heavy metal solution of described pH=1.0: with 0.25mM PbNO
3, CuNO
3, CdNO
3, ZnNO
3Be dissolved in and use 0.1M HNO in the 1L deionized water
3Solution is adjusted to pH=1.0.
Described 0.1M HNO
3The preparation of solution: accurately get the 5.5ml concentrated nitric acid, be settled to 1L with ionized water.
Treatment effect sees Table 1.The concentration of heavy metal contaminants is 0.25mM in the waste water as can be seen, and the chestnut skin that adopts 15 order particle diameters is to Cd
2+, Pb
2+, Zn
2+And Cu
2+Treatment effect reach 92.17%, 99.18%, 89.74% and 94.18%.
The chestnut skin of table 1 15 order particle diameters is to the treatment effect of compound heavy metal contaminants
| Concentration (g/l) | Adsorption rate (%) | |||
| Cd 2+ | Pb 2+ | Zn 2+ | Cu 2+ | |
| 80 | 92.17 | 99.18 | 89.74 | 94.18 |
Embodiment 2
In 65 ℃ of thermostat containers, dry 25h grinds, and sieves with the chestnut skin, and the chestnut skin of getting 20 order particle diameters is standby.
Take by weighing the above-mentioned chestnut skin that sieves of 3.0g in the 100ml centrifuge tube, the compound heavy metal solution (SMS) that adds 50mlpH=2.0, the 24h that under room temperature, vibrates, with mixed solution in the centrifugal 20min of 5000rmp, use the 0.45um membrane filtration, measure heavy metal (cadmium, lead, copper, zinc) content in the filtrate.
The preparation of the compound heavy metal solution of described pH=2.0: with 0.25mM PbNO
3, CuNO
3, CdNO
3, ZnNO
3Be dissolved in and use 0.1M HNO in the 1L deionized water
3Solution is adjusted to pH=2.0.
Described 0.1M HNO
3The preparation of solution: accurately get the 5.5ml concentrated nitric acid, be settled to 1L with ionized water.
Treatment effect sees Table 2, and the concentration of heavy metal contaminants is 0.25mM in the waste water as can be seen, and the chestnut skin that adopts 20 order particle diameters is to Cd
2+, Pb
2+, Zn
2+And Cu
2+Treatment effect reach 81.11%, 97.65%, 79.69% and 85.23%.
The chestnut skin of table 2 20 order particle diameters is to the treatment effect of compound heavy metal contaminants
| Concentration (g/l) | Adsorption rate (%) | |||
| Cd 2+ | Pb 2+ | Zn 2+ | Cu 2+ | |
| 15 | 81.11 | 97.65 | 79.69 | 85.23 |
Embodiment 3
In 70 ℃ of thermostat containers, drying 20h grinds, and sieves with the chestnut skin, and the chestnut skin of getting 40 order particle diameters is standby.
Take by weighing the above-mentioned chestnut skin that sieves of 2.0g in the 100ml centrifuge tube, the compound heavy metal solution (SMS) that adds 50ml pH=3.0, the 24h that under room temperature, vibrates, with mixed solution in the centrifugal 20min of 5000rmp, use the 0.45um membrane filtration, measure heavy metal (cadmium, lead, copper, zinc) content in the filtrate.
The preparation of the compound heavy metal solution of described pH=3.0: with 0.25mM PbNO
3, CuNO
3, CdNO
3, ZnNO
3Be dissolved in and use 0.1M HNO in the 1L deionized water
3Solution is adjusted to pH=3.0.
Described 0.1M HNO
3The preparation of solution: accurately get the 5.5ml concentrated nitric acid, be settled to 1L with ionized water.
Treatment effect sees Table 3, and the concentration of heavy metal contaminants is 0.25mM in the waste water as can be seen, and the chestnut skin that adopts 40 order particle diameters is to Cd
2+, Pb
2+, Zn
2+And Cu
2+Treatment effect reach 66.52%, 98.97%, 61.93% and 79.31%.
The chestnut skin of table 3 40 order particle diameters is to the treatment effect of compound heavy metal contaminants
| Concentration (g/l) | Adsorption rate (%) | |||
| Cd 2+ | Pb 2+ | Zn 2+ | Cu 2+ | |
| 10 | 66.52 | 98.97 | 61.93 | 79.31 |
Because chestnut skin of the present invention is for the physical adsorption process that is treated to of heavy metal, its processing mode can be:
Oscillation treatment: elder generation with in the pending waste water of a certain amount of adding, makes the chestnut skin fully contact with pending waste water with the shaking table vibration chestnut skin then, and solid-liquid separation finally realizes the processing to waste water then.
Adsorption column: the chestnut skin is added in the PVC post of certain diameter and height with certain density, heavy metal-containing waste water is passed through adsorption column with certain flow rate, the final processing that realizes waste water by peristaltic pump.
Fluidized-bed: the chestnut leathercraft (soccer star's particle or other shapes) of certain particle size is layed in a body by certain thickness; the waste water water distribution can adopt top feedwater, bottom feedwater and parallel water supply modes according to different situations; receive water in water distribution direction heteropleural or vertical side, realize processing heavy metal-containing waste water.
Claims (6)
1. the treatment process of an acid heavy metal polluted waste water is characterized in that: be the processing that sorbent material is used for acid heavy metal polluted waste water with the chestnut peel.
2. described according to claim 1, the treatment process of acid heavy metal polluted waste water is characterized in that: the pH=1.0-3.0 of described heavy metal polluted waste water.
3. described according to claim 1, the treatment process of acid heavy metal polluted waste water is characterized in that: described chestnut peel particle diameter is the 10-60 order.
4. described according to claim 1, the treatment process of acid heavy metal polluted waste water is characterized in that: described chestnut peel particle diameter is the 10-40 order.
5. described according to claim 1, the treatment process of acid heavy metal polluted waste water is characterized in that: the chestnut peel consumption of every liter of heavy metal polluted waste water is 40-80g.
6. described according to claim 1, the treatment process of acid heavy metal polluted waste water is characterized in that: described chestnut peel should grind with the chestnut skin in 60-70 ℃ of dry 20-30h before using, and sieves, and it is standby to get 10-60 order particle diameter chestnut skin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046816 CN1891639A (en) | 2005-07-06 | 2005-07-06 | Method for treating acid heavy metal polluted waste water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046816 CN1891639A (en) | 2005-07-06 | 2005-07-06 | Method for treating acid heavy metal polluted waste water |
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| Publication Number | Publication Date |
|---|---|
| CN1891639A true CN1891639A (en) | 2007-01-10 |
Family
ID=37596873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510046816 Pending CN1891639A (en) | 2005-07-06 | 2005-07-06 | Method for treating acid heavy metal polluted waste water |
Country Status (1)
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|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583619A (en) * | 2012-01-19 | 2012-07-18 | 靖德兵 | Method for removing heavy metal in water by utilizing plant-biomass composite adsorbent |
| CN102935353A (en) * | 2012-10-31 | 2013-02-20 | 河北农业大学 | Adsorption of modified chestnut inner skin on lead ions in sewage |
| CN105749884A (en) * | 2016-03-28 | 2016-07-13 | 柳州联海科技有限公司 | Nitrogen-ammonia adsorbent prepared from modified chestnut shells and production method |
-
2005
- 2005-07-06 CN CN 200510046816 patent/CN1891639A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583619A (en) * | 2012-01-19 | 2012-07-18 | 靖德兵 | Method for removing heavy metal in water by utilizing plant-biomass composite adsorbent |
| CN102935353A (en) * | 2012-10-31 | 2013-02-20 | 河北农业大学 | Adsorption of modified chestnut inner skin on lead ions in sewage |
| CN105749884A (en) * | 2016-03-28 | 2016-07-13 | 柳州联海科技有限公司 | Nitrogen-ammonia adsorbent prepared from modified chestnut shells and production method |
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