CS272851B1 - Process for removing of the watersoluble compounds of copper from waste water - Google Patents
Process for removing of the watersoluble compounds of copper from waste water Download PDFInfo
- Publication number
- CS272851B1 CS272851B1 CS913088A CS913088A CS272851B1 CS 272851 B1 CS272851 B1 CS 272851B1 CS 913088 A CS913088 A CS 913088A CS 913088 A CS913088 A CS 913088A CS 272851 B1 CS272851 B1 CS 272851B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- waste water
- stirrer
- filtration
- calcium carbonate
- sludge
- Prior art date
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 23
- 150000001875 compounds Chemical class 0.000 title claims abstract description 5
- 238000000034 method Methods 0.000 title claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title abstract 2
- 229910052802 copper Inorganic materials 0.000 title abstract 2
- 239000010949 copper Substances 0.000 title abstract 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 6
- 239000007864 aqueous solution Substances 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 150000002736 metal compounds Chemical class 0.000 claims description 2
- 229940088417 precipitated calcium carbonate Drugs 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- MZGNSEAPZQGJRB-UHFFFAOYSA-N dimethyldithiocarbamic acid Chemical compound CN(C)C(S)=S MZGNSEAPZQGJRB-UHFFFAOYSA-N 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 230000001376 precipitating effect Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010812 mixed waste Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
Description
(54) Sposob odstraňovanin vodorozpustných zlúčenín médi z odpadových vod (57) Rieši sa čistenie odpadových vod, najma z výroby dosiek plošných spojov, od vo-_ dorozpustných zlúčenín ťažkých kovov, najma médi. Odpadně vody sa za miešania neutralizuji! mikromletým uhličitanom vápenatým na pil 5,8 až 7,7 v množstve až o 10 hmot. % vačšom ako je zásadité neutralizačně kapacita odpadovej vody. Potom sa přidá vodný roztok dimetyíditiokarbamidamu v ekvivalentnom množstve a vzniklá zrazenina sa odstráni s výhodou filtráciou.(54) Waste water removal method of water-soluble compounds (57) Waste water treatment, in particular from the production of printed circuit boards, from water-soluble heavy metal compounds, in particular the media, is addressed. The waste water is neutralized with stirring! micronized calcium carbonate per saw 5.8 to 7.7 in an amount of up to 10 wt. % more than the basic neutralization capacity of the waste water. An aqueous solution of dimethyidithiocarbamidam in an equivalent amount is then added and the resulting precipitate is preferably removed by filtration.
CS 272 851 BlCS 272 851 Bl
Vynález sa týká sposobu odstraňovania vodorozpustných zlúčenín médi a ďalších ťažkých kovov z odpadových vod, predovšetkým z výroby dosiek plošných spojov. Ďalej uvedeným spásobom možno čistit aj odpadové vody podobného charakteru z chemického priemyslu a povrchovej úpravy kovov. Odstraňovanie ťažkých kovov, najma médi ako toxickej látky z odpadových vod z výroby dosiek plošných spojov sa nedá uskutočniť klasickou neutralizačnou technológiou, nakoíko část Cu je viazaná vo formě stabilného amokomplexu.The invention relates to a method of removing water-soluble compounds from the waste water, especially from the production of printed circuit boards, by the medium and other heavy metals. In the following manner, waste water of a similar nature from the chemical industry and metal surface treatment can also be treated. Removal of heavy metals, in particular the media as a toxic substance from waste water from the production of printed circuit boards cannot be carried out by conventional neutralization technology, since part of Cu is bound in the form of a stable amocomplex.
Vzhladom k tomu, že obsah médi vo vypúšťaných.odpadových vodách do mestskej kanalizácie nesmie překročit hodnotu 0,1 až 0,5 mg.I-1 je potřebný osobitný sposob čistenia týchto vod.Since the content of the medium in the discharged waste water into the urban sewage system must not exceed the value of 0.1 to 0.5 mg.I -1 , a special treatment of these waters is necessary.
Na odstraňovanie amokomplexu médi a iných komplexně viazaných kovov z odpadových vod sa používajú redukčně metody, zrážanie sírnikom sodným v určenej oblasti pH, organickými sulfidmi a kyselinami v prípadnej kombinácii s vhodnými sorbentmi, uíahčujúcimi filtráciu vzniklých chemických kalov. Nevýhodou najčastejšie používaného sírnika sodného ako zrážacieho činidla je, že v mierne kyslej oblasti zrážania vzniká toxický sirovodík, ktorý je potřebné odsávat a detoxikovať. Pri použití niektorých organických zrážacích činidiel dochádza k vylučovaniu ťažko filtrovatelnej koloidnej síry, ktorá zafarbuje vodu do žita.Reduction methods, precipitation with sodium sulphide in a defined pH range, organic sulphides and acids, if appropriate in combination with suitable sorbents, facilitating filtration of the resulting chemical sludge, are used to remove the amocomplex of media and other complex bound metals from the waste water. A disadvantage of the most commonly used sodium sulfide as a precipitating agent is that toxic acid sulfide is produced in the slightly acidic precipitation area, which needs to be sucked off and detoxified. The use of some organic precipitants leads to the excretion of hardly filterable colloidal sulfur, which stains water into the rye.
Ďalšou nevýhodou doteraz známých postupov čistenia odpadových vod napr.t podía AO č. 256 692 je, že sa používajú dva druhy neuťralizačných činidiel a to alkalický lúh a hydroxid vápenatý, pričom nadbytok zrážacieho činidla ťažkých kovov sa musí odstraňovat prídavkom ďalších činidiel.A further disadvantage of the prior art waste water treatment processes, e.g. 256 692 is that two types of non-neutralizing agents are used, namely alkaline lye and calcium hydroxide, and the excess heavy metal precipitant must be removed by the addition of additional agents.
Vyššie uvedené nedos.tatky odstraňuje poetup podía vynálezu, ktorého podstatou je, že sa nnjsk3r odpadové vody za miešania neutralizujú na pil 5,8 nž 7,7 posobenim mikromletého uhličitanu vápenatého v množstve až o 10 hmot. % vačšom ako je zásaditá neutralizačně kapacita odpadovej vody. Potom sa přidá ako zrážacie činidlo vodný roztok dimetyldithiokarbamidanu v ekvivalentnom množstve. Vzniklá zrazenina vo formě kalov sa odstráni s výhodou filtráciou, Prídavok mikromletého uhličitanu vápenatého podstatné zlepšuje filtrovatelnosť kalov. Možno použiť ako prírodný tak i zrážaný uhličitan vápenatý. Ako zrážacie činidlo sa upřednostňuje sodná soí dimetylditiokarbamidanu, ktorá je dostupná a lačná. Vzniklé nerozpustné komplexy médi a ďalšíqh ťažkých kovov sú stále v poměrně širokom rozmedzí pH a pri miernom predávkovaní dimetyldithiokarbamidamom tento nesfarbuje odpadovú vodu.The aforementioned shortcomings eliminate the process according to the invention, which consists in neutralizing the effluent to a pH of 5.8 to 7.7 by stirring micronized calcium carbonate in an amount of up to 10% by weight. % more than the basic neutralization capacity of the waste water. An aqueous solution of dimethyldithiocarbamidan in equivalent amount is then added as a precipitating agent. The resulting sludge precipitate is preferably removed by filtration. The addition of micronized calcium carbonate substantially improves the filterability of the sludge. Both natural and precipitated calcium carbonate can be used. The precipitating agent is preferably the sodium salt of dimethyldithiocarbamidan, which is available and fasting. The resulting insoluble complexes of the media and other heavy metals are still in a relatively wide pH range and, with a slight overdose of dimethyldithiocarbamidam, this does not stain the waste water.
Mikromletý uhličitan vápenatý zabezpečí stabilnú hodnotu v rozmedzí 5,8 - 7,7 pódia druhu upravovanej odpadovej vody. Po následnom zrážaní Cu a ostatných ťažkých kovov napr.: Sn, Pb, Pd, Cd, a i. s dimetylditiokarbamldanom vznikne stabilný nerozpustný komplex daných ťažkých kovov, ktorý má výborné sedimentačně a filtračně vlastnosti.The micronised calcium carbonate provides a stable value in the range of 5.8-7.7 on the basis of the type of waste water to be treated. After subsequent precipitation of Cu and other heavy metals e.g. Sn, Pb, Pd, Cd, and others. with dimethyldithiocarbamldane a stable insoluble complex of the given heavy metals is obtained which has excellent sedimentation and filtration properties.
Z toho dovodu si filtrácia chemických kalov nevyžaduje náročné filtračně zariadenie.Therefore, filtration of chemical sludge does not require a sophisticated filtration device.
Z uvedeného vyplývá, že len kombináciou neutralizácie s uhličitanom vápenatým a zrážania s dimetylditiokarbamidanu sa dosiahne požadovaný efekt. Podstatná časť technologických operácii možno plné automatizovat, čím sa zabezpečí stabilita technologického režimu aj pri varíabilnom obsahu Cu a uvedených ďalších ťažkých kovov v čistenej odpadovej vodě.It follows that only the combination of neutralization with calcium carbonate and precipitation with dimethyldithiocarbamidan will achieve the desired effect. A substantial part of the technological operations can be fully automated, thus ensuring the stability of the technological regime even with the variable content of Cu and the mentioned other heavy metals in the treated waste water.
Příklad 1Example 1
Do'1 500 ml reakčnej banky opatrenej vrtulovým miešadlom, násypkou a prikvapkávacím lievikom sa predsadilo 1 000 ml zmesnej odpadovej vody z výroby dosiek plošných spojov. Voda s hodnotou pH 1,94 Obsahovala 58,66 ing.I-1 Cu, 37,83 mg.l1 Su a 3,5 mg.l-1 Pd. Po zapnutí miešadla sa v malých dávkách prisypalo 1,65 g mikromletého uhličitanu vápenatého. Obsah baňky sa potom míešal 30 minút, pričom hodnota pH odpadovej vody sa ustálila na 7,2. Po tejto době. sa za stálého miešania připustilo z odmerky 1,8 ml 10%-ného dimetylditiokarbamidanu sodného a roztok sa miešal ďalších 15 minút.1000 ml of mixed waste water from PCB production was implanted in a 500 ml reaction flask equipped with a propeller stirrer, a hopper and a dropping funnel. Water with a pH of 1.94 It contained 58.66 ing.I -1 Cu, 37.83 mg.l -1 Su and 3.5 mg.l -1 Pd. After the stirrer was switched on, 1.65 g of micronized calcium carbonate was added in small portions. The contents of the flask were then mixed for 30 minutes while the pH of the waste water was stabilized at 7.2. After this time. while stirring, 1.8 ml of 10% sodium dimethyldithiocarbamidate was added from a measuring cup and the solution was stirred for a further 15 minutes.
CS 272 851 BlCS 272 851 Bl
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS913088A CS272851B1 (en) | 1988-02-18 | 1988-02-18 | Process for removing of the watersoluble compounds of copper from waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS913088A CS272851B1 (en) | 1988-02-18 | 1988-02-18 | Process for removing of the watersoluble compounds of copper from waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS272851B1 true CS272851B1 (en) | 1991-02-12 |
Family
ID=5442616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS913088A CS272851B1 (en) | 1988-02-18 | 1988-02-18 | Process for removing of the watersoluble compounds of copper from waste water |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS272851B1 (en) |
-
1988
- 1988-02-18 CS CS913088A patent/CS272851B1/en unknown
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS63294986A (en) | Treatment of heavy metal-containing waste water | |
| US5372726A (en) | Compound for the treatment of water polluted with metal ions, process for its production and application | |
| HU207498B (en) | Process for removing heavy metals from waste waters and process for producing precipitating agent for them | |
| AU605992B2 (en) | Process for the treatment of effluents containing cyanide and toxic metals, using hydrogen peroxide and trimercaptotriazine | |
| US5347071A (en) | Process for the removal of heavy metals from contaminants | |
| JP2948879B2 (en) | Metal collecting agent and metal collecting method | |
| JP2001240843A (en) | Heavy metal scavenger and scavenging method | |
| JPH09187752A (en) | Method for treating waste incineration ash and molten fly ash | |
| JPH04267982A (en) | Immobilization of metal in solid state substance | |
| KR100259563B1 (en) | Method for treating waste water containing heavy metal using material containing calsium, magnesium | |
| JPH10113677A (en) | Trapping agent for heavy metal and trapping method of heavy metal | |
| CS272851B1 (en) | Process for removing of the watersoluble compounds of copper from waste water | |
| JP3928017B2 (en) | Treatment agent for waste liquid containing heavy metal and treatment method thereof | |
| JPS60106585A (en) | Treatment of waste water | |
| JP3334786B2 (en) | Treatment method for wastewater containing insoluble and soluble lead, chromium and zinc | |
| JP3049851B2 (en) | Treatment method for wastewater containing selenium | |
| JP2575886B2 (en) | Chemical cleaning waste liquid treatment method | |
| CN101898824A (en) | A kind of sulfide heavy metal chelating collector and preparation method thereof | |
| JPS61161191A (en) | Treatment of heavy metal ion-containing solution | |
| JP2548096B2 (en) | Method of treating wastewater containing cadmium | |
| NL8105594A (en) | METHOD FOR REMOVING MERCURY FROM INDUSTRIAL WASTEWATER. | |
| JP4497385B2 (en) | Metal collection method | |
| EP0433580B1 (en) | Metal scavengers and wastewater treatment processes | |
| JPH08103774A (en) | Treatment of waste water | |
| JP3733452B2 (en) | Waste disposal method |