Method for degrading phosphorus-containing flame retardant wastewater

A flame retardant and waste water technology, applied in chemical instruments and methods, water pollutants, adsorbed water/sewage treatment, etc., can solve the problems of activated carbon price and modification method complex, non-phosphorus flame retardant waste water adsorption research and other issues , to achieve the effects of easy-to-obtain and cheap raw materials, simple preparation methods, and cost reduction

Inactive Publication Date: 2019-04-12
ZHEJIANG ZHENGJIE ENVIRONMENTAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the application of activated carbon and activated carbon modified materials in wastewater treatment, there are many domestic patents, but due to various reasons such as the price of activated carbon and the complexity of modification methods, and the adsorption of phosphorus-containing flame retardant wastewater has not been systematically studied.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The compound medicine is prepared according to the following method:

[0037] (a) Add 0.1g of β-cyclodextrin to 50mL of water, stir and dissolve with a magnetic stirrer at 60°C;

[0038] (b) Add 5 g of bentonite to the above solution, stir with a magnetic stirrer for 3 hours, filter, and dry the filter residue at 60°C to obtain β-cyclodextrin-Bent;

[0039] (c) Add the above-mentioned β-cyclodextrin-Bent according to the weight percentage of 25% activated carbon, and mix evenly to obtain the compound medicine.

[0040] The liquid phosphorus removal agent is prepared according to the following method:

[0041] Add 2.5g of sodium sulfite to 50mL of 40% ferric chloride solution, mix well, then add 2mL of lanthanum chloride solution with a concentration of 0.05g / L, stir for 2 hours, ultrasonic for a period of time, and then stand for 12 hours, filter Prepare liquid dephosphorization agent.

[0042] Take phosphorus-containing flame retardant wastewater from a company in Z...

Embodiment 2

[0044] The process is similar to that of Example 1, but the pH is adjusted to 7 after adding the compound agent, and the rest of the steps are the same. The results show that the removal rate of phosphorus in the wastewater is 80.05%.

Embodiment 3

[0046] Similar to the process of Example 1, but the shaking time is 2h, and the rest of the steps are the same. The result shows that the removal rate of phosphorus in the wastewater is 87.88%.

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PUM

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Abstract

The invention relates to a method for degrading phosphorus-containing flame retardant wastewater. The method comprises the following steps: adding a compound reagent with a weight percentage ratio of0.01-0.05% of wastewater into the phosphorus-containing flame retardant wastewater, adjusting the pH value to 2-7, putting the mixture into a constant-temperature oscillator, and adjusting the temperature to 20-40 DEG C, adjusting the rotating speed to 100-200 rpm, carrying out oscillation for 0.5-2.5 hours, taking out the wastewater from the constant-temperature oscillator, adding a liquid phosphorus removal agent with a weight percentage ratio of 0.1-0.2% of the wastewater, uniformly carrying out mixing, carrying out standing for a reaction for a period of time, then adjusting the pH value to be neutral, carrying out standing for a period of time, and taking the supernatant of the sample to detect the concentration of residual total phosphorus in the wastewater. According to the adoptedmulti-step processing method, firstly, organic phosphorus and inorganic phosphorus in a polymerization state in the material wastewater are adsorbed by an adsorption material, then flocculation precipitation is carried out on the inorganic phosphorus, and finally the purpose of efficiently removing total phosphorus is achieved. In addition, a three-step method comprising adsorption, flocculation precipitation and flocculation precipitation is selected for treating the wastewater, and the effect is better.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for degrading wastewater containing phosphorus flame retardants. Background technique [0002] Due to the wide use of phosphorus-based flame retardants, high pollution, and strong toxicity, wastewater containing phosphorus-based flame retardants not only causes serious pollution to the environment, but also seriously endangers people's health. Such problems have attracted widespread attention from all walks of life. , so the treatment of this kind of wastewater has huge social and environmental benefits. It is very urgent and necessary to choose a suitable method to deal with flame retardant pollutants in the water environment. [0003] At present, in industrial water treatment, the adsorption method has the advantages of fast adsorption speed, simple operation, recyclable adsorption products, and no secondary pollution to the environment. It has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C02F1/28C02F1/66C02F101/10C02F101/30
CPCC02F1/28C02F1/52C02F1/56C02F1/66C02F2101/105C02F2101/30
Inventor 樊文亮徐高松周立新赵丽
Owner ZHEJIANG ZHENGJIE ENVIRONMENTAL SCI & TECH CO LTD
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