Method for treating PEDOT/PSS-containing wastewater
A treatment method and wastewater technology, applied in the fields of adsorption water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. The effect of chromaticity, solving pollution problems, low price
Active Publication Date: 2021-06-08
HUIZHOU CAPCHEM CHEM CO LTD
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Problems solved by technology
[0005] The present invention provides a treatment method for waste water containing PEDOT / PSS, to solve the pollution problem of waste water discharge containing PEDOT / PSS, while reducing the cost of waste water treatment
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1-16
[0048] Add PSS calcium-containing precipitant to PEDOT / PSS wastewater, stir for 30 minutes, and let it stand for 1 hour. A clear boundary line between precipitation and clear water can be seen. Filtration obtained the first precipitate and the first filtrate. Add an adsorbent to the first filtrate, stir for 1 hour, and filter after standing to obtain a second filtrate and a second precipitate.
[0049] The addition amount that contains PEDOT / PSS waste water and treatment agent in each embodiment is as shown in table 1.
[0050] The consumption of the reaction material of each embodiment of table 1
[0051]
[0052]
[0053] The COD, color and chromaticity of the wastewater involved in Examples 1-16 were detected, and the results are shown in Table 2.
[0054] Table 2 Changes in water quality before and after treatment of wastewater containing PEDOT
[0055]
[0056]
[0057] Combining the data in Table 1 and Table 2, it can be seen that the added PSS calcium-con...
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Abstract
The invention relates to the field of sewage treatment, and discloses a treatment method for PEDOT / PSS-containing wastewater. The treatment method comprises the following steps: subjecting the PEDOT / PSS-containing wastewater to reacting with a PSS calcium-containing precipitant to generate a precipitate; carrying out separation treatment to obtain a first precipitate and a first filtrate, wherein the first precipitate comprises calcium salts of PEDOT and PSS; and allowing the first filtrate to react with an adsorbent, and conducting separation treatment to obtain a second precipitate and a second filtrate, wherein the second precipitate comprises the adsorbent and organic impurities acting with the adsorbent. According to the method, the special PSS calcium-containing precipitant and the adsorbent are used for treating the PEDOT / PSS-containing wastewater, so the COD and chromaticity of the PEDOT / PSS-containing wastewater are greatly reduced, and pollution problems caused by emission of the PEDOT / PSS-containing wastewater are solved; and the selected PSS calcium-containing precipitant and the adsorbent are low in price and small in dosage, so the treatment cost of the PEDOT / PSS-containing wastewater is greatly saved.
Description
technical field [0001] The invention relates to the field of sewage treatment, in particular to a treatment method for wastewater containing PEDOT / PSS. Background technique [0002] PEDOT (polyethylenedioxythiophene) is a polymer of EDOT (3,4-ethylenedioxythiophene monomer), which has the advantages of simple molecular structure, small energy gap and high conductivity. It is used in organic thin film solar cell materials, OLED materials, Electrochromic materials, transparent electrode materials and other fields have good application value. [0003] Use EDOT, oxidizing agent and dispersant PSS (polystyrene sulfonic acid) as raw materials to prepare PEDOT / PSS dispersion, and the PEDOT / PSS dispersion generated after the reaction will contain a large amount of impurity ions. In order to remove these impurity ions, ion exchange resin and PEDOT / PSS dispersion are generally used for ion exchange. Typically, these used ion exchange resins need to be regenerated for reuse. When th...
Claims
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IPC IPC(8): C02F9/04C02F101/34C02F103/38
CPCC02F1/52C02F1/28C02F2101/40C02F2103/38
Inventor 陈群王帮应胡志坚郭扬
Owner HUIZHOU CAPCHEM CHEM CO LTD