CN104609593A - Method for copper powder displacement removal and recovery of arsenic in water body - Google Patents
Method for copper powder displacement removal and recovery of arsenic in water body Download PDFInfo
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- CN104609593A CN104609593A CN201410785291.XA CN201410785291A CN104609593A CN 104609593 A CN104609593 A CN 104609593A CN 201410785291 A CN201410785291 A CN 201410785291A CN 104609593 A CN104609593 A CN 104609593A
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Abstract
The present invention provides a method for copper powder displacement removal and recovery of arsenic in water body, and the method comprises the following steps: (1) adjusting arsenic-containing wastewater pH to 0-3 with hydrochloric acid, under the protection of nitrogen, adding copper powder, sealing a reactor, stirring for reacting in the stirring speed of 100-600r / min at the reaction temperature of 10-80 DEG C, wherein the replacement time is 10-120min; As (III) content of the arsenic containing wastewater is 0.1-20g / L; the mass of the copper powder accounts is 5-100g / L by volume of the wastewater; (2) after the completion of the replacement, filtering the reaction system, recovering the filtering slag, and fast recrystallizing the filtrate at low temperature to obtain crystals; the method is simple in process, free of secondary pollution, economic and environmentally friendly, and realizes resource reproducible utilization.
Description
(1) technical field
The present invention relates to the displacement of a kind of copper powder remove and reclaim the method for arsenic in water body, belong to heavy metal water-treatment technology field.
(2) background technology
In recent years, arsenic and the widespread use of compound in fields such as medical science, alloy, agricultural chemicals, electronics thereof, greatly facilitate exploitation and the smelting of arsenic compound, this makes a large amount of arsenic enter biosphere.But arsenic toxicity is large, and long-term Excess free enthalpy, can cause serious infringement to HUMAN HEALTH, cause chronic and acute poisoning and even cancer, arsenic pollution problem is urgently to be resolved hurrily.Arsenic pollutes the environmental pollution referred to caused by arsenic or its compound.Different according to the carrier polluted, topsoil, soil pollution and water pollution can be divided into.Water pollution threatens maximum, and the arsenic in the water source of particularly tap water and domestic water pollutes.After arsenic is absorbed by the body, trivalent arsenic can phosphorus participates in interfering bodies reaction, as hindered the synthesis etc. of Triphosaden, arsenic also can react with the sulfydryl of zymoprotein in body, enzyme is lost activity, affects cell eubolism, thus cause tissue injury and body obstacle, directly cause poisoning even dead.Chronic Drinking water endemic arsenism can work the mischief to human body multisystem function, causes as diseases such as hypertension, cardiovascular and cerebrovascular disease, diabetes, skin pigment metabolic disturbances, and finally develops into skin carcinoma.
Assert through the World Health Organization and international cancer research institution, arsenic is one of carcinogen of the mankind, and in USEPA list, arsenic is considered to No. 1 toxin especially.The arsenic of different shape, toxicity is also different, and its toxicity order is AsH successively
3the inorganic As of > (III) > organic As (III) > inorganic As (V) > organic As (V) > simple substance As.Worldwide, the acute or arsenicalism caused because tap water is subject to arsenic pollution, and cause the diseases such as various cancers, even dead case frequently occurs, and these startling data have caused people to the great attention of Arsenic in Drinking Water.1993, the World Health Organization formulate new drinking water standard in regulation arsenic content be restricted to 10ppb, world community also adopts this standard one after another, and permission arsenic content maximum in tap water is dropped to 10ppb from original 50ppb.
How effectively to administer arsenic to pollute, reduce the artificial source of arsenic, become the significant problem that world community is urgently to be resolved hurrily.Wherein arsenic-containing waste water havoc environment, the tap water containing arsenic endangers the health and safety of people, and large quantifier elimination has been carried out in the improvement of polluting for arsenic in water body both at home and abroad.Mainly contain the precipitator method, absorption method, membrane separation process, ion exchange method, oxidation reduction process, the method such as biological process and electrochemical process.Although these methods can remove the arsonium ion of water body middle and high concentration to a certain extent, the arsenic removed exists with other solid waste form, easily causes secondary pollution, and not obvious to the removal effect of lower concentration antimony in water body.
Therefore, study new and effective removal and reclaim arsenic in water body, the reproducible utilization realizing resource is significant.
(3) summary of the invention
The object of the invention is for the deficiency of prior art to arsenic in water body Pollution abatement, provide the displacement of a kind of copper powder remove and reclaim the method for arsenic in water body, by adding appropriate copper powder in the hydrochloric acid system of certain temperature, effectively can remove and reclaiming the arsenic in water body.
For achieving the above object, the present invention adopts following technical scheme:
Copper powder displacement is removed and is reclaimed a method for arsenic in water body, said method comprising the steps of:
(1) with hydrochloric acid, the pH of arsenic-containing waste water is adjusted to 0 ~ 3, under nitrogen protection, adds copper powder, closed reactor, with the speed stirring reaction of 100 ~ 600r/min, temperature of reaction is 10 ~ 80 DEG C, and time swap is 10 ~ 120min; In described arsenic-containing waste water, As (III) content is 0.1 ~ 20g/L; The quality consumption of described copper powder counts 5 ~ 50g/L with the volume of described waste water;
(2) after having replaced, reaction system is filtered, reclaim filter residue, and filtrate is through the crystal of fast low temperature recrystallization gained.
Copper powder displacement of the present invention is removed and reclaims the method for arsenic in water body, and in described step (1), the quality consumption of preferred described copper powder counts 50g/L with the volume of described waste water.
In described step (2), the drying of gained residue washing is black solid afterwards, and main component is Cu
3as; Gained filtrate can obtain white crystal through fast low temperature recrystallization, is CuCl; CuCl and Cu can be prepared while arsenic in water body is removed in copper powder displacement
3as, reaches the object of resource regeneration.
Water body of the present invention is commercial metal Metallurgical Waste Water, surface water or sanitary sewage.
Copper powder of the present invention is recommended to be 60 ~ 400 orders, preferably 200 ~ 400 orders.
The invention has the beneficial effects as follows: the invention solves in arsenic in water body Pollution abatement process poor to High Concentration of Arsenic sewage treatment capacity, and easily cause the chronic illness of secondary pollution.Adopt the method for copper powder displacement, while efficient removal arsenic in water body, do not produce poisonous arsine gas, and important industrial chemicals CuCl and functional materials Cu can be prepared
3as.Preparation technology of the present invention is simple, easy to operate, efficiency is high, be easy to realization, and non-secondary pollution, economic environmental protection, achieves resource reproducible utilization.
(4) accompanying drawing explanation
Fig. 1: 200mL As (III) content is point silver-colored slag leach liquor of 5g/L, adopt hydrochloric acid that pH value of solution is adjusted to 0, add 10g copper powder, pass into closed reactor after nitrogen, stirring velocity is 400r/min, time swap is 60min, the removal efficiency of arsenic in water body and the relation curve of temperature of reaction.
(5) embodiment
Below by specific embodiment, the present invention is further detailed, but protection scope of the present invention is not limited in this.
Embodiment 1
1) getting 200mL As (III) content is that point silver-colored slag leach liquor of 5g/L is in reactor, adopt hydrochloric acid that pH value of solution is adjusted to 0, add 10g copper powder (60 order), pass into closed reactor after nitrogen, stirring velocity is 400r/min, temperature of reaction is 60 DEG C, and time swap is 10 ~ 120min.
Rate of displacement is adopted to assess the displacement removal effect of copper powder to arsenic in water body.
The experimental result of the different time swap of table 1
| Time/min | Rate of displacement/the % of arsenic |
| 10 | 15.8 |
| 30 | 43.5 |
| 60 | 97.8 |
| 90 | 98.2 |
| 120 | 98.9 |
Embodiment 2
1) getting 200mL As (III) content is that the surface water of 0.1g/L is in reactor, adopt hydrochloric acid that pH value of solution is adjusted to 0, add 10g copper powder (400 order), pass into closed reactor after nitrogen, stirring velocity is 400r/min, temperature of reaction is 60 DEG C, and time swap is 10 ~ 120min.
Rate of displacement is adopted to assess the displacement removal effect of copper powder to arsenic in water body.
The experimental result of the different time swap of table 2
| Time/min | Rate of displacement/the % of arsenic |
| 10 | 36.7 |
| 30 | 63.4 |
| 60 | 95.2 |
| 90 | 97.9 |
| 120 | 99.3 |
Embodiment 3
1) getting 200mL As (III) content is that point silver-colored slag leach liquor of 5g/L is in reactor, adopt hydrochloric acid that pH value of solution is adjusted to 0, add 10g copper powder (200 order), pass into closed reactor after nitrogen, stirring velocity is 400r/min, temperature of reaction is 10 ~ 80 DEG C, and time swap is 60min.
Rate of displacement is adopted to assess the displacement removal effect of copper powder to arsenic in water body.
The experimental result of table 3 difference displacement temperature
| Temperature/DEG C | Rate of displacement/the % of arsenic |
| 10 | 25.7 |
| 25 | 46.3 |
| 40 | 61.7 |
| 60 | 97.8 |
| 80 | 98.9 |
Embodiment 4
1) getting 200mL As (III) content is that point silver-colored slag leach liquor of 5g/L is in reactor, adopt hydrochloric acid that pH value of solution is adjusted to 0, add 10g copper powder (200 order), pass into closed reactor after nitrogen, stirring velocity is 100 ~ 600r/min, temperature of reaction is 60 DEG C, and time swap is 60min.
Rate of displacement is adopted to assess the displacement removal effect of copper powder to arsenic in water body.
The displacement experimental result of the different stirring velocity of table 4
| Stirring velocity/(r/min) | Rate of displacement/the % of arsenic |
| 100 | 90.2 |
| 200 | 93.8 |
| 400 | 97.8 |
| 500 | 98.1 |
| 600 | 98.9 |
Embodiment 5
1) getting 200mL As (III) content is that point silver-colored slag leach liquor of 5g/L is in reactor, adopt hydrochloric acid that pH value of solution is adjusted to 0-3, add 10g copper powder (200 order), pass into closed reactor after nitrogen, stirring velocity is 400r/min, temperature of reaction is 60 DEG C, and time swap is 60min.
Rate of displacement is adopted to assess the displacement removal effect of copper powder to arsenic in water body.
The displacement experimental result of the different pH of table 5
| pH | Rate of displacement/the % of arsenic |
| 0 | 97.8 |
| 1 | 90.1 |
| 2 | 89.3 |
| 3 | 88.6 |
Embodiment 6
1) getting 200mL As (III) content is that point silver-colored slag leach liquor of 0.1 ~ 20g/L is in reactor, adopt hydrochloric acid that pH value of solution is adjusted to 0, add 10g copper powder (200 order), pass into closed reactor after nitrogen, stirring velocity is 400r/min, temperature of reaction is 60 DEG C, and time swap is 60min.
Rate of displacement is adopted to assess the displacement removal effect of copper powder to arsenic in water body.
The displacement experimental result of the different arsenic concentration of table 6
| As (III) concentration/mgL -1 | Rate of displacement/% |
| 0.1 | 98.6 |
| 2.0 | 98.1 |
| 5.0 | 97.8 |
| 15.0 | 95.2 |
| 20.0 | 93.4 |
Embodiment 7
1) getting 200mL As (III) content is that point silver-colored slag leach liquor of 5g/L is in reactor, adopt hydrochloric acid that pH value of solution is adjusted to 0, add 1 ~ 10g copper powder (200 order), pass into closed reactor after nitrogen, stirring velocity is 400r/min, temperature of reaction is 40 DEG C, and time swap is 60min.
Rate of displacement is adopted to assess the displacement removal effect of copper powder to arsenic in water body.
The displacement experimental result of the different copper powder add-on of table 7
| Copper powder quality/g | Rate of displacement/the % of arsenic |
| 1.0 | 50.2 |
| 4.0 | 74.2 |
| 6.0 | 85.3 |
| 8.0 | 93.6 |
| 10.0 | 97.8 |
Claims (5)
1. copper powder displacement is removed and is reclaimed a method for arsenic in water body, it is characterized in that, said method comprising the steps of:
(1) with hydrochloric acid, the pH of arsenic-containing waste water is adjusted to 0 ~ 3, under nitrogen protection, adds copper powder, closed reactor, with the speed stirring reaction of 100 ~ 600r/min, temperature of reaction is 10 ~ 80 DEG C, and time swap is 10 ~ 120min; In described arsenic-containing waste water, As (III) content is 0.1 ~ 20g/L; The quality consumption of described copper powder counts 5 ~ 50g/L with the volume of described waste water;
(2) after having replaced, reaction system is filtered, reclaim filter residue, and filtrate is through the crystal of fast low temperature recrystallization gained.
2. copper powder displacement as claimed in claim 1 is removed and reclaims the method for arsenic in water body, and it is characterized in that, the quality consumption of described copper powder counts 50g/L with the volume of described waste water.
3. copper powder displacement as claimed in claim 1 is removed and reclaims the method for arsenic in water body, and it is characterized in that, described water body is commercial metal Metallurgical Waste Water, surface water or sanitary sewage.
4. the copper powder displacement as described in claims 1 to 3 is removed and reclaims the method for arsenic in water body, and it is characterized in that, described copper powder is 60 ~ 400 orders.
5. copper powder displacement as claimed in claim 4 is removed and reclaims the method for arsenic in water body, and it is characterized in that, described copper powder is 200 ~ 400 orders.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1502775A (en) * | 1975-06-30 | 1978-03-01 | Borax Cons Ltd | Removal of arsenic from aqueous effluents |
| JPS5474272A (en) * | 1977-11-25 | 1979-06-14 | Akita Seiren Kk | Method of removing arsenic from aqueous solution |
| CN101613150A (en) * | 2009-07-30 | 2009-12-30 | 云南五鑫实业有限公司 | A kind of method for the treatment of high-arsenious solution with low cost |
| CN104016455A (en) * | 2014-05-08 | 2014-09-03 | 上海丰信环保科技有限公司 | Method for treating arsenic-containing waste water |
-
2014
- 2014-12-16 CN CN201410785291.XA patent/CN104609593B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1502775A (en) * | 1975-06-30 | 1978-03-01 | Borax Cons Ltd | Removal of arsenic from aqueous effluents |
| JPS5474272A (en) * | 1977-11-25 | 1979-06-14 | Akita Seiren Kk | Method of removing arsenic from aqueous solution |
| CN101613150A (en) * | 2009-07-30 | 2009-12-30 | 云南五鑫实业有限公司 | A kind of method for the treatment of high-arsenious solution with low cost |
| CN104016455A (en) * | 2014-05-08 | 2014-09-03 | 上海丰信环保科技有限公司 | Method for treating arsenic-containing waste water |
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