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Wastewater treatment agent and application method thereof

A waste water treatment and medicament technology, which is applied in water/sewage treatment, adsorption water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of high energy consumption for separation and recovery, high environmental risks, etc., to reduce corrosion loss, reduce Energy consumption and loss reduction effect

Inactive Publication Date: 2019-01-04
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problems of high energy consumption and high environmental risk in the separation and recovery of the existing nano-pyrite Fenton catalyst, and to develop a simple and easy-to-obtain method based on the principle of fixing nano-pyrite inside the sodium alginate gel. Wastewater treatment medicament that is easy to separate, and a method for applying the above medicament to wastewater treatment

Method used

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  • Wastewater treatment agent and application method thereof
  • Wastewater treatment agent and application method thereof
  • Wastewater treatment agent and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Preparation of wastewater treatment agent, the steps are as follows:

[0031] 1) Add 0.6 g of nano-pyrite to 50 ml of deionized water, and ultrasonically disperse for 30 minutes to obtain a suspension of nano-pyrite; add 6 g of sodium alginate to 250 ml of deionized water, stir mechanically for 2 hours, and fully dissolve Obtain sodium alginate solution;

[0032] 2) Slowly add the nano-pyrite suspension prepared in 1) into the sodium alginate solution, and stir vigorously at the same time to obtain a mixed semi-gel solution, the mass fraction of nano-pyrite in the semi-gel solution is 0.2%, Sodium alginate mass fraction is 2%;

[0033] 3) using a syringe to drop the mixed semi-gel solution into a calcium chloride solution with a mass concentration of 5%, while stirring the calcium chloride solution at a speed of 100 rpm;

[0034] 4) Place the solution in 3) at room temperature for 3 hours to fully cross-link the prepared agent, and then filter to obtain the product wa...

Embodiment 2

[0037] The wastewater treatment agent of the present invention is used to process the dye rhodamine B in printing and dyeing wastewater, comprising the steps of:

[0038] The waste water treatment agent that embodiment 1 makes is added to the rhodamine B waste water that volume is 50 milliliters mass concentration 10 mg / liter, every 100 milliliters of waste waters add medicament 0.2 gram (by dry weight); Add magnetic stirring rotor, 100 Rev / min magnetic stirring; adding hydrogen peroxide, so that the concentration of hydrogen peroxide is 1 mmol / L; regularly sampling and measuring the concentration of rhodamine B; the concentration of rhodamine B is measured at 554 nanometers by spectrophotometry. According to experiments, the complete removal of rhodamine B can be achieved within 2 hours.

Embodiment 3

[0040] The wastewater treatment agent of the present invention is used to process p-nitrophenol wastewater, comprising the following steps

[0041] The wastewater treatment medicament that embodiment 1 makes is added in the p-nitrophenol wastewater that volume is 100 milliliters mass concentration 100 mg / liter, and every 100 milliliters of waste waters adds medicament 0.4 gram (by dry weight); Reaction vessel is placed in In the shaker, shake at a speed of 150 rpm; add hydrogen peroxide to make the concentration of hydrogen peroxide 10 mmol / L; regularly take samples to measure the concentration of p-nitrophenol; the concentration of p-nitrophenol is equipped with a UV detector HPLC determined at 317 nm. According to experiments, the complete removal of p-nitrophenol can be achieved in 1 hour.

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Abstract

The invention discloses preparation of a wastewater treatment agent and an application method thereof. At present, extensive attention of researchers is paid to a heterogeneous Fenton technology in the field of organic wastewater treatment. Due to low cost and high catalytic activity, nanometer pyrite has excellent application potential in the heterogeneous Fenton field. However, separation and recovery of the nanometer pyrite from a liquid phase need to use ultrafiltration, nanofiltration and other high-energy-consumption means, and the cost is high; the nanometer pyrite Fenton system is lowin effluent pH value and high in iron content, and has relatively high environmental risk. By virtue of the fixation effect of sodium alginate gel on nanometer pyrite grains and the cross-linking effect of sodium alginate molecules and iron ions, the wastewater treatment agent with advantages of being easy to separate and low in cost is prepared in the invention. The agent prepared in the invention has the advantages that the defect that the nanometer pyrite is difficult to separate is effectively overcome, and the environmental risk of the nanometer pyrite is weakened. By adopting the wastewater treatment agent prepared in the invention and the application method thereof, organic wastewater can be effectively treated, and the agent has wide application prospects.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a medicament for wastewater treatment and an application method thereof. Background technique [0002] With the rapid development of social economy, especially the development of chemical industry, printing and dyeing and pharmaceutical industries, a large amount of waste water is discharged into natural water bodies, causing serious environmental problems. Among them, the types and quantities of organic wastewater are increasing day by day. These organic pollutants remain in water for a long time, have a wide range of migration, are difficult to treat, and most of them are biologically toxic, posing severe challenges to human health and ecological environment safety. It is imminent to develop efficient and convenient treatment methods for highly toxic and refractory organic pollutants. The heterogeneous Fenton technology using solid materials as catalysts has been widely res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/28C02F101/38C02F101/34
CPCC02F1/286C02F1/722C02F1/725C02F2101/308C02F2101/345C02F2101/38
Inventor 冯传平刘通陈男
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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