CN114314800A - Phenol-containing wastewater treatment method - Google Patents
Phenol-containing wastewater treatment method Download PDFInfo
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- CN114314800A CN114314800A CN202210007811.9A CN202210007811A CN114314800A CN 114314800 A CN114314800 A CN 114314800A CN 202210007811 A CN202210007811 A CN 202210007811A CN 114314800 A CN114314800 A CN 114314800A
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Abstract
The invention provides a phenol-containing wastewater treatment method, which is characterized by comprising the following steps: the method comprises the following steps of drying, crushing and roasting the iron-containing sludge at high temperature to obtain a catalyst, and adding the catalyst and an oxidant into the phenol-containing wastewater according to a certain proportion for catalytic degradation, so that 100% degradation of the phenol-containing wastewater can be realized.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for treating phenol-containing wastewater.
Background
Phenolic compounds are used in a large number of industrial processes, including gas, petrochemical and pesticide production, which have led to their widespread presence in the waste waters of these industries.
A large amount of phenol flows into a water body and poses serious threat to aquatic systems, and the phenol and derivatives thereof with the concentration of more than 5mg/L are reported to have lethality to fishes, and black and odorous water can be formed when the pollution is serious, so that the ecological environment around the whole water body area is damaged. Phenolic compounds are also a serious health hazard to humans, and phenol poisoning can also severely damage internal organs including the kidney, liver, spleen, lung and heart, and induce cancer.
Disclosure of Invention
The invention aims to provide a method for treating phenolic wastewater, which has the advantages of simple process, convenient operation, low operation cost and good treatment effect and is suitable for phenolic wastewater.
A phenol-containing wastewater treatment method is characterized in that: the method comprises the following steps of drying, crushing and roasting the iron-containing sludge at high temperature to obtain a catalyst, and adding the catalyst and an oxidant into the phenol-containing wastewater according to a certain proportion for catalytic degradation, so that 100% degradation of the phenol-containing wastewater can be realized.
Further, the iron-containing sludge is sludge which is obtained by flocculating and precipitating waste rolling oil and emulsion thereof generated in the production process of steel rolling and then treating the waste rolling oil and the emulsion thereof by a filter press.
Further, the sludge is naturally dried or dried in an oven/drying furnace or other equipment at a temperature lower than 104 ℃.
Further, the high-temperature roasting carbonization treatment atmosphere is a reducing atmosphere or an inert atmosphere, such as nitrogen/argon/hydrogen/helium, the carbonization temperature is 300-900 ℃, and the carbonization time is 1-10 h.
Furthermore, the adding amount of the catalyst is three ten-thousandth to three percent.
Furthermore, the oxidant is hydrogen peroxide, persulfate and the like, and the adding amount is five ten-thousandths to five thousandths.
Furthermore, the concentration of the phenol-containing wastewater is 1-1000 mg/L.
Waste oil generated in the process of rolling the steel plate by the rolling mill is dried and roasted, and the generated iron-carbon compound is used for activating persulfate to be used for catalytic degradation of organic pollutants in water. Is suitable for wide pH range, can efficiently catalyze and degrade phenol and can be repeatedly utilized.
Drawings
FIG. 1 degradation rate of phenol over time at different pH conditions;
FIG. 2 Effect of cycle number on phenol degradation efficiency.
Detailed Description
The invention is further illustrated by the accompanying drawings 1 and 2, wherein the degradation rate of phenol (initial concentration of phenol is 20mg/L, catalyst dosage is 1 g/L) with time is shown in figure 1 under different pH conditions, and the influence of the cycle number on the degradation efficiency of phenol is shown in figure 2 (under the condition of pH 6.5, each time of catalytic degradation is 60 min).
Example 1
Drying the sludge containing the rolling at room temperature, crushing the dried sludge into small particles, putting the small particles into a carbonization furnace for reduction, and roasting the small particles for 4 hours at 600 ℃ in a nitrogen atmosphere to prepare the iron-carbon composite catalyst.
Filtering the beneficiation wastewater of xanthate, adjusting the pH of the wastewater to be =4.5 by using acid, then adding 0.97 mmol/L hydrogen peroxide and 50 mg/L iron-carbon composite catalyst, stirring for reacting for 180 min, standing for precipitating, and obtaining the supernatant which is the treated wastewater.
Example 2
Naturally airing the sludge generated by the filter press or drying the sludge at 104 ℃, crushing the dried sludge into small particles, then putting the small particles into a carbonization furnace, roasting the small particles at the high temperature of 900 ℃ for 1h under the reduction condition to obtain small-particle iron carbide catalysts, and then adding the prepared catalysts and oxidants into the phenol-containing wastewater for catalytic degradation, so that 100% degradation of the phenol-containing wastewater can be realized.
Wherein the oxidant is hydrogen peroxide, persulfate and the like, and the adding amount is five ten thousandths to five thousandths.
Example 3
Drying the sludge containing the rolling at room temperature, crushing the dried sludge into small particles, putting the small particles into a carbonization furnace for reduction, and roasting the small particles at 300 ℃ for 10 hours under the atmosphere of argon to prepare the iron-carbon composite catalyst.
Filtering the beneficiation wastewater of xanthate, adjusting the pH of the wastewater to be =4.5 by using acid, then adding 0.97 mmol/L persulfate and 60 mg/L iron-carbon composite catalyst, stirring for reacting for 160 min, standing for precipitating, and obtaining the supernatant which is the treated wastewater.
Claims (8)
1. A phenol-containing wastewater treatment method is characterized in that: the method comprises the following steps of drying, crushing and roasting the iron-containing sludge at high temperature to obtain a catalyst, and adding the catalyst and an oxidant into the phenol-containing wastewater according to a certain proportion for catalytic degradation.
2. The method for treating phenol-containing wastewater according to claim 1, characterized in that: the iron-containing sludge is sludge which is obtained by flocculating and precipitating waste rolling oil and emulsion thereof generated in the production process of steel rolling and then treating the waste rolling oil and the emulsion thereof by a filter press.
3. The method for treating phenol-containing wastewater according to claim 1, characterized in that: the sludge is dried by natural air drying or drying treatment in an oven/drying furnace device at the temperature of lower than 104 ℃.
4. The method for treating phenol-containing wastewater according to claim 1, characterized in that: the high-temperature roasting carbonization treatment atmosphere is a reducing atmosphere or an inert atmosphere, the carbonization temperature is 300-900 ℃, and the carbonization time is 1-10 h.
5. The method for treating phenol-containing wastewater according to claim 4, characterized in that: the inert atmosphere is one of nitrogen, argon, hydrogen and helium.
6. The method for treating phenol-containing wastewater according to claim 1, characterized in that: the addition amount of the catalyst is recorded as three ten-thousandths to three percent by weight.
7. The method for treating phenol-containing wastewater according to claim 1, characterized in that: the oxidant is one of hydrogen peroxide and persulfate, and the adding amount is recorded as five ten-thousandths to five thousandths of the weight.
8. The method for treating phenol-containing wastewater according to claim 1, characterized in that: the concentration of the phenol-containing wastewater is 1-1000 mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210007811.9A CN114314800A (en) | 2022-01-06 | 2022-01-06 | Phenol-containing wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210007811.9A CN114314800A (en) | 2022-01-06 | 2022-01-06 | Phenol-containing wastewater treatment method |
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| Publication Number | Publication Date |
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| CN114314800A true CN114314800A (en) | 2022-04-12 |
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| CN202210007811.9A Pending CN114314800A (en) | 2022-01-06 | 2022-01-06 | Phenol-containing wastewater treatment method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180093260A1 (en) * | 2016-05-20 | 2018-04-05 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Catalysts for degradation of organic pollutants in printing and dyeing wastewater and method of preparation thereof |
| CN108212164A (en) * | 2018-01-12 | 2018-06-29 | 中国科学院城市环境研究所 | A kind of type Fenton catalyst and preparation method thereof |
| CN109604624A (en) * | 2019-01-08 | 2019-04-12 | 哈尔滨工业大学 | A kind of method and application preparing nano zero valence iron using water treatment plant's iron containing sludge |
| CN111298821A (en) * | 2020-02-07 | 2020-06-19 | 天津大学 | Method for preparing novel iron-nitrogen-carbon catalyst by utilizing printing and dyeing wastewater flocculated sludge |
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2022
- 2022-01-06 CN CN202210007811.9A patent/CN114314800A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180093260A1 (en) * | 2016-05-20 | 2018-04-05 | The Hong Kong Research Institute Of Textiles And Apparel Limited | Catalysts for degradation of organic pollutants in printing and dyeing wastewater and method of preparation thereof |
| CN108212164A (en) * | 2018-01-12 | 2018-06-29 | 中国科学院城市环境研究所 | A kind of type Fenton catalyst and preparation method thereof |
| CN109604624A (en) * | 2019-01-08 | 2019-04-12 | 哈尔滨工业大学 | A kind of method and application preparing nano zero valence iron using water treatment plant's iron containing sludge |
| CN111298821A (en) * | 2020-02-07 | 2020-06-19 | 天津大学 | Method for preparing novel iron-nitrogen-carbon catalyst by utilizing printing and dyeing wastewater flocculated sludge |
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