CN101628750B - Sulfide heavy metal chelating agent and preparation method thereof - Google Patents
Sulfide heavy metal chelating agent and preparation method thereof Download PDFInfo
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- CN101628750B CN101628750B CN200910034870XA CN200910034870A CN101628750B CN 101628750 B CN101628750 B CN 101628750B CN 200910034870X A CN200910034870X A CN 200910034870XA CN 200910034870 A CN200910034870 A CN 200910034870A CN 101628750 B CN101628750 B CN 101628750B
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Abstract
The invention discloses a sulfide heavy metal chelating agent and a preparation method thereof; the method adopts a reaction between sodium sulfide water solution and sulfur to generate sodium polysulfide and uses aluminum sulfate, aluminium chloride and other aluminum salts as stabilizers so as to strengthen the flocculation effect and increase the catching effect on heavy metal ions. The chelating agent is used to treat the industrial wastewater containing heavy metal ions, can effectively restrain the generation of hydrogen sulfide, and reacts with all kinds of heavy metal ions quickly at room temperature to generate water insoluble sulfides precipitate, wherein, the particles of the produced sulfides is large, the floccule is dense and the settling time is reduced so that the concentrations of the heavy metal ions in wastewater are easy to be reduced below the national discharge standard, the generated residue can be used for recycling heavy metals and secondary pollution is not easy to cause; the method of the invention has simple devices, convenient operation and low cost, thus being applicable to the wastewater treatment in industries such as circuit board industry, plating industry, metal finishing industry, manufacturing industry, coal power stations, municipal or industrial waste incineration industry, battery production and the like.
Description
Technical field
The present invention relates to removal, purification or the trapping technique of heavy metal ion in the water body, is a kind of preparation of sulfide heavy metal chelating agent and the application method in water treatment thereof specifically.
Background technology
Produce the waste water that contains multiple metal ions such as chromium, nickel, copper, cadmium, lead, zinc, aluminium, gold and silver, mercury through regular meeting in the industry; above-mentioned heavy metal ion has under physical environment stable in properties, accumulation in vivo, lower concentration and has characteristics such as secular toxic side effect; if can not get dealing carefully with, will cause severe contamination to environment.
Traditional pH regulator precipitator method are handled the waste water that contains heavy metal ion, promptly by adding alkaline chemical such as sodium hydroxide, yellow soda ash, lime, the pH value of waste water are transferred to about 11, form corresponding heavy metal hydroxide precipitation to remove heavy metal ion.The pH regulator precipitator method need careful control pH value, to guarantee best removal effect, if contain zwitter-ions such as zine ion, aluminum ion in the waste water, the precipitation of hydroxide that forms is dissolved when high alkalinity, needs to change different pH values, carries out multi stage precipitation and handles.Because the pH value of processed waste water is too high, supernatant liquid must pump into neutralization tank, adds acid readjustment pH to 6～9, could discharge, and treatment step is comparatively loaded down with trivial details.
Part producer adopts the Sodium Sulphide precipitator method to handle heavy metal wastewater thereby, and sodium sulphite that utilization adds and heavy metal ion form the sulfide precipitation of indissoluble to remove heavy metal ion.The solubleness of heavy metal ion sulfide precipitation in water is than low 3-10 the order of magnitude of corresponding metal precipitation of hydroxide, and it is less to remain in the aqueous solution concentration of heavy metal ion, and multiple metal ion can be removed in a step precipitation process.Compare with the pH regulator precipitator method, precipitation has advantages such as easily separated, easy filtration, subsequent disposal be simple.But sodium sulphite can produce the peculiar smell of hydrogen sulfide in the use, during dissolving the oxidation side reaction can take place, and heavy metal sulfide precipitation floc particle is tiny, the settling time waits so long very much, has reduced the removal effect of heavy metal ion.
Summary of the invention
The objective of the invention is to: overcome the defective that prior art exists, a kind of sulfide heavy metal chelating agent and preparation method thereof be provided, can suppress the generation of hydrogen sulfide effectively, at normal temperatures with waste water in Hg
2+, Cd
2+, Pb
2+, Mn
2+, Cu
2+, Ni
2+, Zn
2+, Cr
3+, Hg
2+, Cr
6+React rapidly etc. various heavy metal ion, generate water-insoluble sulfide precipitate.
In order to address the above problem, the present invention passes through sodium sulfide solution and reaction of Salmon-Saxl, generate sodium polysulphide, adding aluminium salt such as Tai-Ace S 150, aluminum chloride at last is stablizer, with the enhanced flocculation effect, strengthen capture effect to heavy metal ion, make a kind of heavy metal chelating agent efficiently (be called for short XMT), be used to handle the trade effluent that contains heavy metal ion, the present technique invention has suppressed the generation of hydrogen sulfide effectively, at normal temperatures with waste water in Hg
2+, Cd
2+, Pb
2+, Mn
2+, Cu
2+, Ni
2+, Zn
2+, Cr
3+, Cr
6+React rapidly etc. various heavy metal ion, generate water-insoluble sulfide precipitate.
Realize that the technical scheme that purpose of the present invention is taked is:
A kind of sulfide heavy metal chelating agent, its feed composition proportioning is:
Sodium sulphite 260g
SULPHUR POWDER 35～175g
Dispersion agent water glass 1～2g
Flocculation reinforcer Tai-Ace S 150 and/or aluminum chloride 20-25g
Water 1000mL.
Its preparation method is: 260g sodium sulphite is dissolved in the 1000mL water, places reactor, 70-95 ℃ of water bath with thermostatic control heating.Control stir speed (S.S.) 30-100r.min
-1, under whipped state, add 1-2g dispersion agent water glass; After treating that water glass dissolves fully, add SULPHUR POWDER 35-175g, make to form sulfur suspension by the sulphur moistened surface.Control reaction 20-30min, sulphur dissolves gradually.Add 20-25g flocculation reinforcer Tai-Ace S 150 and (or) aluminum chloride.Stir, be cooled to room temperature, obtain henna heavy metal chelating agent.According to heavy metal ion kind and the concentration in the waste water, add an amount of sulfide heavy metal chelating agent of the present invention, also can be used with other water conditioners such as PAM, the heavy metal sulfide deposit seeds that generates is big, flco is closely knit, settling time is short, concentration of heavy metal ion in the processed waste water reaches discharging standards, and the recyclable heavy metal of the residue of generation is difficult for producing secondary pollution; This trapping agent also can be used for the noble metal in the recycle-water solution.
Sulfide heavy metal chelating agent of the present invention is used to handle the trade effluent that contains heavy metal ion, can effectively suppress the generation of hydrogen sulfide, at normal temperatures with waste water in Hg
2+, Cd
2+, Pb
2+, Mn
2+, Cu
2+, Ni
2+, Zn
2+, Cr
3+, Cr
6+React rapidly etc. various heavy metal ion, generate water-insoluble sulfide precipitate.Sulfide heavy metal chelating agent of the present invention, preparation technology is simple, and is easy to use, and treatment effect is good.Can use separately, also can be used with other water conditioner.The sulfide precipitation particle of producing is big, flco is closely knit, has shortened the settling time, and the concentration of heavy metal ion in the waste water is reached below the national specified discharge standard, and the recyclable heavy metal of the residue of generation is difficult for producing secondary pollution; This trapping agent also can be used for the noble metal in the recycle-water solution.Required equipment is simple, and is easy to operate, and expense is cheap, goes for circuit card, plating, metal finishing, film manufacturing, coal-fired plant, municipal administration or industry wastewater treatments such as industrial refuse and incineration, battery production.
Embodiment
Below in conjunction with embodiment, the present invention is elaborated.
Embodiment 1
260g sodium sulphite is dissolved in during 1000mL purifies waste water, and places reactor, 70 ℃ of waters bath with thermostatic control heating.Control stir speed (S.S.) 30r.min
-1, under whipped state, add 1g dispersion agent water glass; After treating that water glass dissolves fully, add sulphur 35g, make to form sulfur suspension by the sulphur moistened surface.Control reaction 20min, the dissolving of sulphur gradual slow.Add 20 flocculation reinforcer Tai-Ace S 150 or aluminum chloride.Stir, be cooled to room temperature, obtain henna heavy metal chelating agent.
Embodiment 2
260g sodium sulphite is dissolved in during 1000mL purifies waste water, and places reactor, and other parameters see Table 1.
Embodiment 3
260g sodium sulphite is dissolved in during 1000mL purifies waste water, and places reactor, and other parameters see Table 1.
Embodiment 4
260g sodium sulphite is dissolved in during 1000mL purifies waste water, and places reactor, and other parameters see Table 1.
Table 1
| Processing parameter | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Sodium sulphite/g | 260 | 260 | 260 | 260 |
| Purify waste water/mL | 1000 | 1000 | 1000 | 1000 |
| Water bath with thermostatic control/℃ | 70 | 75 | 85 | 95 |
| Stir speed (S.S.)/r.min -1 | 30 | 50 | 80 | 100 |
| Water glass/g | 1 | 1.3 | 1.7 | 2 |
| Sulphur/g | 35 | 80 | 130 | 175 |
| Reaction times/min | 20 | 25 | 25 | 30 |
| The flocculation reinforcer | 20g Tai-Ace S 150 | 25g aluminum chloride | 20g aluminum chloride | 25g Tai-Ace S 150 |
Select the board wastewater of Suzhou company for use, recording copper ion concentration is 127.66mg.L
-1, pH is 5.1.Add 300mg.L
-1The heavy metal chelating agent of embodiment 1-embodiment 4, stir speed (S.S.) is 30r.min
-1, reaction is left standstill filtration after stirring 5min, gets supernatant liquor and measures its copper ion concentration and be respectively 0.413mg.L
-1, 0.310mg.L
-1, 0.297mg.L
-1And 0.271mg.L
-1, copper ion concentration all reaches discharging standards.
Select the electroplating wastewater of Zhenjiang company for use, record Zn
2+Concentration is 5.14mg/L, Cr
6+Concentration is 4.91mg/L, Ni
2+Concentration is 4.88mg/L.Add 80mg.L
-1The heavy metal chelating agent of embodiment 1-embodiment 4, stir speed (S.S.) is 30r.min
-1, reaction is left standstill filtration after stirring 5min, gets supernatant liquor and measures its Zn
2+Concentration is respectively 1.217mg.L
-1, 1.330mg.L
-1, 0.992mg.L
-1And 0.931mg.L
-1, all reach discharging standards; Measure its Cr
6+Concentration is respectively 0.433mg.L
-1, 0.376mg.L
-1, 0.098mg.L
-1And 0.075mg.L
-1, all reach discharging standards; Measure its Ni
2+Concentration is respectively 0.942mg.L
-1, 0.817mg.L
-1, 0.090mg.L
-1And 0.876mg.L
-1, all reach discharging standards.
Patent of the present invention has the same performance that similarly captures to other heavy metal ion.
Claims (1)
1. sulfide heavy metal chelating agent, its feed composition proportioning is:
Sodium sulphite 260g
SULPHUR POWDER 35～175g
Dispersion agent water glass 1～2g
Flocculation reinforcer Tai-Ace S 150 and/or aluminum chloride 20-25g
Water 1000mL;
Described sulfide heavy metal chelating agent makes according to following preparation method:
260g sodium sulphite is dissolved in the 1000mL water, places reactor, 70-95 ℃ of water bath with thermostatic control heating; The control stir speed (S.S.) is at 30-100r.min
-1, under whipped state, add 1-2g dispersion agent water glass; After treating the water glass dissolving, add SULPHUR POWDER 35-175g, make to form sulfur suspension by the sulphur moistened surface; Control reaction 20-30min, sulphur dissolves gradually; Add 20-25g flocculation reinforcer Tai-Ace S 150 and/or aluminum chloride; Stir, be cooled to room temperature.
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| CN101898824B (en) * | 2010-04-12 | 2012-10-24 | 南京师范大学 | Sulfide heavy metal chelating trapping agent and preparation method thereof |
| CN102336494A (en) * | 2010-07-21 | 2012-02-01 | 北京当升材料科技股份有限公司 | Waste water processing method during heavy metal compound production process |
| CN102070235B (en) * | 2010-11-11 | 2012-10-31 | 华南理工大学 | Water-soluble organic thiamine heavy metal chelating agent and preparation method thereof |
| CN102001734B (en) * | 2010-12-01 | 2013-06-12 | 新疆天业（集团）有限公司 | Heavy metal settling agent for treating mercury-containing wastewater |
| CN102531137B (en) * | 2012-01-04 | 2014-01-22 | 南京师范大学 | Sulfide heavy metal chelating agent and preparation method thereof |
| CN102593416B (en) * | 2012-02-20 | 2014-08-27 | 宁德新能源科技有限公司 | Lithium secondary battery and cathode plate thereof |
| CN103555340A (en) * | 2013-10-29 | 2014-02-05 | 廖清琳 | Novel environment-friendly reagent for reducing leaching concentration of various heavy metals |
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| CN104496139A (en) * | 2015-01-01 | 2015-04-08 | 扬州杰嘉工业固废处置有限公司 | Pretreatment method of heavy metal sludge |
| CN104961212A (en) * | 2015-06-24 | 2015-10-07 | 东莞市庆海化工有限公司 | Heavy metal chelating agent |
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| CN110643368A (en) * | 2019-09-26 | 2020-01-03 | 长沙凯天工研院环保服务有限公司 | Method for synthesizing organic high-sulfur stabilizer based on industrial waste sulfur slag |
| CN110646272B (en) * | 2019-09-26 | 2022-04-12 | 武汉海关技术中心 | Method for purifying hydrophilic ionic liquid |
| CN110835130A (en) * | 2019-12-03 | 2020-02-25 | 云南科力新材料股份有限公司 | Heavy metal ion trapping agent and preparation method thereof |
| CN112919669A (en) * | 2021-01-21 | 2021-06-08 | 江西楚杭环保科技有限公司 | Deep treatment method for heavy metal sewage of refuse landfill |
| CN115286795A (en) * | 2022-08-31 | 2022-11-04 | 湖南西林环保材料有限公司 | Cyanuric sulfide high polymer material and preparation method and application thereof |
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Effective date of registration: 20180420 Address after: 211124 Jinqiao Road 111, Chunhua Road, Jiangning District, Nanjing, Jiangsu Patentee after: Nanjing Zheng Long Environmental Protection Engineering Co., Ltd. Address before: Yuen Road in Nanjing city Jiangsu province 210046 Xianlin new town No. 1 Patentee before: Nanjing Normal University |