CN104761039B - A kind of association complex processing cadmium wastewater and application process thereof - Google Patents
A kind of association complex processing cadmium wastewater and application process thereof Download PDFInfo
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- CN104761039B CN104761039B CN201410775639.7A CN201410775639A CN104761039B CN 104761039 B CN104761039 B CN 104761039B CN 201410775639 A CN201410775639 A CN 201410775639A CN 104761039 B CN104761039 B CN 104761039B
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Abstract
A kind of association complex processing cadmium wastewater and application thereof, described association complex is that trithiocyanuric acid trisodium salt is 20%～65% by percentage in mass ratio, and SDD salt is 35%～80% composite form.The application in processing cadmium wastewater of the described association complex, it is that described association complex is joined in cadmium wastewater, association complex and the wastewater quality added ratio is for 1:200～1:5000, after stirring 5～30min, aluminium polychlorid and the wastewater quality added ratio for 1:200～1:5000, after stirring 5～30min, stands 0.5～12 hour at normal temperatures, the suspension of gained through filter filter after, water outlet containing cadmium lower than national grade one discharge standard.Present invention process flow process is simple, with low cost, easy to operate, efficient, energy-conservation, precipitation less, avirulence, secondary pollution will not be caused.
Description
Technical field
The present invention relates to technical field of sewage, specifically a kind of association complex processing cadmium wastewater and application process thereof.
Background technology
In process of production, the volume of smoke produced during smelting contains substantial amounts of heavy metal substance, after using wet dust collector to process, most heavy metal substance can enter into acidity and gather dust in spray liquid, form the waste water that content of beary metal is higher, if this effluent part is without heavy Cadmium treated direct reuse, cadmium can continuous circulative accumulation in the entire system, eventually affect the quality of matallurgical products.Meanwhile, it is directly discharged in environment if the high waste water of cadmium content is not treated, serious heavy metal pollution can be caused.If cadmium wastewater exhaust emission soil, cadmium can be made to be entered in plant by root system of plant, if the mankind's edible food high containing cadmium for a long time, or drink the water high containing cadmium, cadmium can be made to enter human body in a large number, reduce the content of Skeleton System calcium, cause bone brittleness easy to break；Meanwhile, cadmium enters human body also can pass through biomagnification and accumulation, and lung, liver, kidney, immune system and reproductive system are caused a series of damage.Additionally, cadmium can also seriously suppress microbial growth, when cadmium concentration is 0.1～1mg/l, microbial death rate is up to 50%, when in water, cadmium mass concentration is 0.1mg/l, so that it may suppress self-purification of waters.
For this, China " integrated wastewater discharge standard " (GB8978-1996) clear stipulaties, cadmium is first kind pollutant, and the highest permission discharge quality concentration is 0.1mg/l, it is impossible to dilution processes." sewage enters town sewer water standard " (CJ343-2010) according to up-to-date revision specifies, the concentration of the water quality requirement cadmium of tri-kinds of grades of A, B, C is not higher than 0.1mg/l, it is impossible to dilution processes.Therefore, the process of cadmium wastewater, there is great society, economy and Significance for Environment.
Process cadmium wastewater and have the methods such as chemical precipitation method, electrolysis, absorption method, ion exchange, membrane separation technique and bioanalysis.In actual applications, the many existing defects of said method are as big in absorption method reagent injected volume；The processing cost such as membrane separation technique, electrolysis is high, and chemical precipitation method easily causes secondary pollution, and bioanalysis is difficult to reach deeply removing cadmium etc., and when especially a large amount of cadmium wastewater being processed, these shortcomings seem especially prominent.Flocculation sedimentation is conventional pollutant effluents treatment technology, improves water quality and has irreplaceable advantage, as few in reagent dosage, easy and simple to handle, cost is low and is beneficial to a large amount of wastewater treatment.But flocculant does not have removal water soluble ion performance, thus resulting in except cadmium is incomplete in waste water, in waste water, cadmium content is difficult to reach discharge standard.
China Patent Publication No. is 103773958A, and name is called the patent of " a kind of method for removing cadmium ", and the method described in patent is, first carries out one section and purifies pre-copper removal；It is initially charged the pre-copper removal of crude zinc powder, liquid after the copper grade obtained after filtering is higher, cadmium grade is relatively low copper-cadmium slag and copper removal according to copper, cadmium content in middle supernatant；After pre-copper removal, liquid addition blowing zinc powder is further continued for copper removal, cadmium, obtains the copper-cadmium slag that copper grade is relatively low, cadmium grade is higher after filtration；China Patent Publication No. is: 103060555A, name is called the patent of " a kind of method of purifying and cadmium removing from nickel and cobalt solution containing cadmium ", method described in patent is, select the cadmium concentration nickel and cobalt solution less than 0.1g/L, first the cadmium in nickel and cobalt solution is enriched in cobalt liquor or washing liquid by solvent extraction, makes the concentration of cadmium reach 0.1～1.0g/L；Then resin anion (R.A.) is adopted to be removed by the cadmium in cobalt liquor or washing liquid.
The defect in technique is processed for cadmium wastewater, the present invention is at the upper composite chelate group introducing seizure cadmium ion in flocculation sediment basis, make it have and cadmium ion chelation and two kinds of performances of flocculation, it is contemplated that effective cadmium wastewater flocculating sedimentation can be obtained and process practical approach simultaneously.
Summary of the invention
It is an object of the invention to the deficiency overcoming prior art to exist, there is provided a kind of association complex from cadmium wastewater except the method for cadmium, to low concentration cadmium wastewater, can purification more thoroughly and recycling, except in solution after cadmium, the concentration of cadmium is lower than 0.05mg/l, non-secondary pollution also carries out recycling of water.
The technical solution used in the present invention is: a kind of association complex processing cadmium wastewater, and this association complex is to be 20%～65% by trithiocyanuric acid trisodium salt by mass percentage, and SDD salt is 35%～80% composite form.
Described association complex preparation method step is: add in container by the ratio of trithiocyanuric acid trisodium salt with pure water 1:1 in mass ratio, stirring 5min furnishing solution, the ratio of SDD salt Yu pure water 1:1 in mass ratio is added in another container, stirring 5min furnishing solution, the trithiocyanuric acid trisodium-salt solution mixed up and SDD saline solution are simultaneously introduced in another container and stir 5min, make liquid after still aging 10min, be described association complex.
The application in processing cadmium wastewater of the described association complex, it is that described association complex is joined in cadmium wastewater, association complex and the wastewater quality added ratio is for 1:200～1:5000, after stirring 5～30min, aluminium polychlorid and the wastewater quality added ratio for 1:200～1:5000, after stirring 5～30min, stands 0.5～12 hour at normal temperatures, the suspension of gained through filter filter after, water outlet containing cadmium lower than national grade one discharge standard.
Compared with the conventional method, advantages of the present invention and effect are:
1, technological operation is simple, and flow process is unobstructed, makes the removing process of cadmium in cadmium wastewater become simple possible.
2, the removal efficiency of cadmium is high, and uses reagent cost cheap, and consumption is low.Precipitation non-toxic substance leaches.Water outlet can directly serve as commercial production Treated sewage reusing.
3. the cadmium wastewater handled by, containing cadmium concentration at 1500～0.1mg/l, except cadmium is applied widely.
4, in cadmium wastewater after treatment the lowering of concentration of cadmium ion to below 0.05mg/l, water outlet containing cadmium lower than national grade one discharge standard, China " integrated wastewater discharge standard " (GB8978-1996) clear stipulaties, cadmium is first kind pollutant, the highest permission discharge quality concentration is 0.1mg/l, it is impossible to dilution processes.
Accompanying drawing explanation
Fig. 1 is that the association complex of process cadmium wastewater of the present invention is for processing the process chart of cadmium wastewater.
Detailed description of the invention
Below by way of specific embodiment, technical scheme is described further.
Embodiment 1
By mass percentage, by trithiocyanuric acid trisodium salt 65%, SDD salt 35% is made into association complex, process containing cadmium in certain smelting wastewater, in waste water, cadmium content is 1500mg/l, and test takes 5g association complex and joins in 1L cadmium wastewater, stirs 30min, add 5g aluminium polychlorid, staticly settling 24h, after filtering with filter, in water outlet, cadmium content is 0.022mg/l, clearance is more than 99.9%, and water outlet is lower than national grade one discharge standard.
Embodiment 2
By mass percentage, by trithiocyanuric acid trisodium salt 55%, SDD salt 45% is made into association complex, process containing cadmium in certain smelting wastewater, in waste water, cadmium content is 1000mg/l, and test takes 4g association complex and joins in 1L cadmium wastewater, stirs 20min, add 4g aluminium polychlorid, staticly settling 20h, after filtering with filter, in water outlet, cadmium content is 0.028mg/l, clearance is more than 99.9%, and water outlet is lower than national grade one discharge standard.
Embodiment 3
By mass percentage, by trithiocyanuric acid trisodium salt 45%, SDD salt 55% is made into association complex, process containing cadmium in certain smelting wastewater, in waste water, cadmium content is 350mg/l, and test takes 2g association complex and joins in 1L cadmium wastewater, stirs 15min, add 2g aluminium polychlorid, staticly settling 12h, after filtering with filter, in water outlet, cadmium content is 0.030mg/l, clearance is more than 99.9%, and water outlet is lower than national grade one discharge standard.
Embodiment 4
By mass percentage, by trithiocyanuric acid trisodium salt 35%, SDD salt 65% is made into association complex, process containing cadmium in certain smelting wastewater, in waste water, cadmium content is 100mg/l, and test takes 1g association complex and joins in 1L cadmium wastewater, stirs 10min, add 1g aluminium polychlorid, staticly settling 8h, after filtering with filter, in water outlet, cadmium content is 0.033mg/l, clearance is more than 99.9%, and water outlet is lower than national grade one discharge standard.
Embodiment 5
By mass percentage, by trithiocyanuric acid trisodium salt 20%, SDD salt 80% is made into association complex, process containing cadmium in certain smelting wastewater, in waste water, cadmium content is 0.1mg/l, and test takes 0.02g association complex and joins in 1L cadmium wastewater, stirs 5min, add 0.02g aluminium polychlorid, staticly settling 0.5h, after filtering with filter, in water outlet, cadmium content is 0.02mg/l, clearance is more than 99.9%, and water outlet is lower than national grade one discharge standard.
Claims (2)
1. the association complex processing cadmium wastewater, it is characterised in that described association complex is to be 20% ~ 65% by trithiocyanuric acid trisodium salt by mass percentage, SDD salt is 35% ~ 80% composite form,
Described association complex preparation method is: add in container by the ratio of trithiocyanuric acid trisodium salt with pure water 1:1 in mass ratio, stirring 5min furnishing solution, the ratio of SDD salt Yu pure water 1:1 in mass ratio is added in another container, stirring 5min furnishing solution, the trithiocyanuric acid trisodium-salt solution mixed up and SDD saline solution are simultaneously introduced in another container and stir 5min, make liquid after still aging 10min, obtain described association complex.
2. the association complex according to claim 1 application in processing cadmium wastewater, it is characterized in that, described association complex is joined in cadmium wastewater, association complex and the wastewater quality added ratio is for 1:200 ~ 1:5000, and after stirring 5 ~ 30min, the aluminium polychlorid of addition and wastewater quality ratio is for 1:200 ~ 1:5000, after stirring 5 ~ 30min, stand 0.5 ~ 12 hour at normal temperatures, the suspension of gained through filter filter after, water outlet containing cadmium lower than national grade one discharge standard.
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| CN106336071B (en) * | 2016-08-23 | 2019-08-13 | 广州超邦化工有限公司 | The processing method of cadmium ion in a kind of acid non-cyanide plating cadmium waste water without EDTA |
| CN109265383A (en) * | 2018-10-08 | 2019-01-25 | 泰山医学院 | A kind of synthetic method of good fortune U.S. potassium and application in the treatment of waste water |
| CN111265810A (en) * | 2019-09-20 | 2020-06-12 | 连云港新江环保材料有限公司 | Efficient fly ash chelating agent and preparation method thereof |
| CN110577269A (en) * | 2019-10-15 | 2019-12-17 | 湖南亿康环保科技有限公司 | Composite reagent for removing manganese and ammonia nitrogen in wastewater and application method thereof |
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| JP2002194328A (en) * | 2000-12-26 | 2002-07-10 | Mitsubishi Rayon Co Ltd | Heavy metal fixing agent and method for fixing heavy metal using the same |
| CN101456939A (en) * | 2008-12-02 | 2009-06-17 | 天津壹生环保科技有限公司 | Water-soluble high molecule intercalating agent containing thiourea group and preparation method |
| CN102145945A (en) * | 2011-02-21 | 2011-08-10 | 中国科学院生态环境研究中心 | Method for removing trace cadmium in high salt wastewater by combining polymer chelation with adsorption |
| CN102249388A (en) * | 2011-05-05 | 2011-11-23 | 长安大学 | Method for performing synergetic degradation on cadmium ammonia complex in underground water |
| CN103304064A (en) * | 2013-07-03 | 2013-09-18 | 上海丰信环保科技有限公司 | Method for treating high-concentration copper-containing wastewater through ph adjustment |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002194328A (en) * | 2000-12-26 | 2002-07-10 | Mitsubishi Rayon Co Ltd | Heavy metal fixing agent and method for fixing heavy metal using the same |
| CN101456939A (en) * | 2008-12-02 | 2009-06-17 | 天津壹生环保科技有限公司 | Water-soluble high molecule intercalating agent containing thiourea group and preparation method |
| CN102145945A (en) * | 2011-02-21 | 2011-08-10 | 中国科学院生态环境研究中心 | Method for removing trace cadmium in high salt wastewater by combining polymer chelation with adsorption |
| CN102249388A (en) * | 2011-05-05 | 2011-11-23 | 长安大学 | Method for performing synergetic degradation on cadmium ammonia complex in underground water |
| CN103304064A (en) * | 2013-07-03 | 2013-09-18 | 上海丰信环保科技有限公司 | Method for treating high-concentration copper-containing wastewater through ph adjustment |
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