CN105777598A - Method for synthesizing organic precipitants (AHD) capable of removing silver ions in industrial wastewater - Google Patents
Method for synthesizing organic precipitants (AHD) capable of removing silver ions in industrial wastewater Download PDFInfo
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- CN105777598A CN105777598A CN201610158589.7A CN201610158589A CN105777598A CN 105777598 A CN105777598 A CN 105777598A CN 201610158589 A CN201610158589 A CN 201610158589A CN 105777598 A CN105777598 A CN 105777598A
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- ahd
- industrial wastewater
- organic
- koh
- silver ions
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C333/00—Derivatives of thiocarbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C333/14—Dithiocarbamic acids; Derivatives thereof
- C07C333/16—Salts of dithiocarbamic acids
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a method for synthesizing organic precipitants (AHD) capable of removing silver ions in industrial wastewater. The method includes that C<4>H<13>N<3> and CS<2> are used as main raw materials, and KOH and H<2>O are used as auxiliary materials, so that the organic precipitants (AHD) with effects of precipitating Ag<2+> in the industrial wastewater can be synthesized. The method has the advantages that substitution reaction is carried out on the organic precipitants (AHD) and the Ag<2+> to generate organic silver precipitates, organic matters can be removed by the aid of high-temperature combustion processes, and accordingly the follow-up single-substance Ag recycling cost can be reduced; the raw materials are low in cost and are easily available, processes for synthesizing the organic precipitants are simple, the silver ions in the industrial wastewater can be effectively removed, and the like.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to a kind of organic precipitant (AHD) synthetic method removing silver ion in industrial wastewater.
Technical background
Silver ion in silver processing industry waste water is mostly with Ag2+Form exist, owing to silver belongs to rare precious metals, its precipitation is reclaimed, economical and environmental benefit is huge.
At present, Ag in industrial wastewater2+Remove based on sulphide precipitation less costly, that Technical comparing is ripe and hydroxide precipitation method.Sulphide precipitation is to add FeSO in water4·7H2O、NaHSO3、Na2S2O5Sulfides makes itself and Ag2+Reaction generates precipitation.And hydroxide precipitation method is directly to add NaOH, Ca (OH)2Ag in water is made Deng basic agent2+It is transformed into precipitate, removes it again through methods such as filtrations.Owing to the above-mentioned sedimentation method are generating Ag (OH)2While, also have the generation of other inorganic salts precipitation so that simple substance Ag therein reclaims difficulty, adds cost recovery.The AHD of the present invention be then by with Ag2+There is substitution reaction, generating a kind of organic silver precipitation, realizing the removal of organic substance again through high-temperature combustion method, thus reducing the cost of subsequent recovery simple substance Ag.
Summary of the invention
Present invention is primarily targeted at and produce a large amount of mud containing other inorganic salts precipitation when processing silver contained industrial waste water for conventional chemical methods thus causing Ag2+The difficult problems such as cost recovery is big, it is proposed that a kind of organic precipitant (AHD) synthetic method removing silver ion in industrial wastewater.
(1) the synthesis chemical equation of organic precipitant prepared by the present invention is as follows:
(2) the organic precipitant application principle equation that prepared by the present invention is as follows:
Positive tetrahedron structure therein following (centered by Ag):
The feature of the present invention:
The organic precipitant of present invention synthesis is by the coordinate bond on AHD molecule and Ag2+Strong combination, by Ag2+Inclusion, inside precipitant, becomes stable, organic combined silver precipitate that molecular weight is bigger.For this organogenous sediment, it is possible to directly remove its organic substance by the mode of high-temp combustion, that compares the generation of the above-mentioned traditional chemical sedimentation method contains Fe2+、Na+Deng the precipitation of inorganic impurity, greatly reduce Ag2+Extract and cost recovery.
Detailed description of the invention:
The organic precipitant preparation of the present invention and application process are as follows:
KOH3g-15g, C is added in there-necked flask4H13N34g-20g, H2O10g-50g, starts the agitator speed stirring reaction 30 minutes with 400r/min at normal temperatures and pressures；Until fully after reaction, adding CS in there-necked flask24g-20g, is heated to 40 DEG C, isothermal reaction 8 hours, and the shiny red transparency liquid obtained after cooling is the organic precipitant (AHD) of the present invention.
Industry silver-containing waste water (Ag it is added to after AHD is configured to the solution that volume fraction is 0.1%2+Initial concentration is 0.88mg/L) middle stirring, after natural sedimentation, take the precipitating sludge centrifugation dehydration with 3000r/min, take supernatant and measure its Ag2+Concentration, when reaction temperature is 25～35 DEG C, pH is 8.5～9.5, and the response time is 35～40min, and when in every cubic metre of industrial silver-containing waste water, AHD dosage is 0.8-1.2L, it is to Ag2+Clearance up to 90.7%-94.2%.
5 embodiments presented below further illustrate the present invention.Embodiment is used for illustrating present invention, rather than limits present invention.
Embodiment 1:
3gKOH, 4gC is added in there-necked flask4H13N3And 10gH2O, starts the agitator speed stirring reaction 30 minutes with 400r/min at normal temperatures and pressures；Until fully after reaction, adding 4gCS in there-necked flask2, it being heated to 40 DEG C, isothermal reaction 8 hours, the shiny red transparency liquid obtained after cooling is the organic precipitant (AHD) of the present invention.
AHD is configured to after the solution that volume fraction is 0.1% with 1L/m3Proportioning be added to industry silver-containing waste water water sample (Ag2+Initial concentration is 0.88mg/L) in stirring reaction 30min, then with the centrifugation dehydration of 3000r/min, take supernatant and measure its Ag2+Concentration, it is shown that AHD is to Ag2+Clearance reach 94.2%.
Embodiment 2-5 is that raw material dosage is different from the difference of embodiment 1, and other technological parameter is all identical with preparation method.Table 1 is medicament synthesizing formula and the removal capacity test result of 5 embodiments.
5 embodiments of table 1 present invention and application effect thereof
Claims (2)
1. organic precipitant (AHD) synthetic method removing silver ion in industrial wastewater, it is characterised in that adopt following steps to carry out:
(1) by a certain amount of KOH, C4H13N3And H2O mixing adds in there-necked flask；
(2) there-necked flask is connected in constant temperature blender with magnetic force, at normal temperatures and pressures with the speed stirring reaction 30 minutes of 400r/min；
(3) until after fully reacting, being slowly added a certain amount of CS2；
(4) being warming up to 40 DEG C, the shiny red transparency liquid obtained after isothermal reaction cooling in 8 hours is the organic precipitant of this research.
2. a kind of organic precipitant (AHD) synthetic method removing silver ion in industrial wastewater according to claim 1, it is characterised in that KOH, C4H13N3、H2O and CS2Mol ratio be 0.75: 0.5-0.6: 8: 0.7-0.8, described C4H13N3Molecular weight 103.17, KOH molecule amount 56, CS2Molecular weight 76.14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610158589.7A CN105777598A (en) | 2016-03-18 | 2016-03-18 | Method for synthesizing organic precipitants (AHD) capable of removing silver ions in industrial wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610158589.7A CN105777598A (en) | 2016-03-18 | 2016-03-18 | Method for synthesizing organic precipitants (AHD) capable of removing silver ions in industrial wastewater |
Publications (1)
| Publication Number | Publication Date |
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| CN105777598A true CN105777598A (en) | 2016-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610158589.7A Pending CN105777598A (en) | 2016-03-18 | 2016-03-18 | Method for synthesizing organic precipitants (AHD) capable of removing silver ions in industrial wastewater |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1831020A (en) * | 2006-02-17 | 2006-09-13 | 重庆大学 | Method for synthesizing dithioamino formic acid and diivinyl triamineethyl polymers |
| CN102603046A (en) * | 2012-04-05 | 2012-07-25 | 环境保护部华南环境科学研究所 | Heavy metal ion complexing agent, preparation method and applications thereof |
| CN103143328A (en) * | 2013-03-07 | 2013-06-12 | 西安科技大学 | Preparation method of heavy metal chelating adsorbent |
-
2016
- 2016-03-18 CN CN201610158589.7A patent/CN105777598A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1831020A (en) * | 2006-02-17 | 2006-09-13 | 重庆大学 | Method for synthesizing dithioamino formic acid and diivinyl triamineethyl polymers |
| CN102603046A (en) * | 2012-04-05 | 2012-07-25 | 环境保护部华南环境科学研究所 | Heavy metal ion complexing agent, preparation method and applications thereof |
| CN103143328A (en) * | 2013-03-07 | 2013-06-12 | 西安科技大学 | Preparation method of heavy metal chelating adsorbent |
Non-Patent Citations (1)
| Title |
|---|
| 蔡庆庆 等: "有机沉淀剂合成及其在含银废水处理中的应用研究", 《应用化工》 * |
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Application publication date: 20160720 |
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