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Method for removing phthalic acid monoester pollutants in water body through ion exchange resin

A technology of phthalic acid monoester and phthalic acid monoester, which is applied in the field of selective removal of phthalic acid monoester environmental hormones in water, and achieves the effect of simple operation

Inactive Publication Date: 2014-04-02
NANJING YIZHOU ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Two of the adsorbent materials, goethite and chitosan, are cheap and easy to obtain, and have the advantages of fast removal rate of phthalate monoester, but the adsorption amount of chitosan to phthalate monoester is small (0.015 mg / g), at the same time, there is the problem of difficult regeneration, and it is discarded after being adsorbed once, which often easily causes secondary pollution; although goethite has a large adsorption capacity (120mg / g) and is easy to regenerate, goethite is nano-scale Particles need to be separated from the original solution by filtration after adsorption saturation, the operation is complicated, and it is easy to cause the loss of adsorption materials
Although the biodegradation method has mature technology, simple operation and low operating cost, the removal rate is slow, and most of the phthalic acid monoesters are adsorbed in the activated sludge, which is easy to cause secondary pollution
In addition, due to the high toxicity of phthalic acid monoesters, the concentration in water should not be too high, which also limits the widespread use of biodegradation methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 3.2ml (about 1 gram) of D201 strong basic anion exchange resin whose functional group is quaternary amino group into a jacketed glass adsorption column (Φ12×160mm). The concentration of monobutyl phthalate in the influent water is 20mg / L. After filtering, adjust the pH value to 6, and pass through the resin bed at a flow rate of 25 BV / h under the condition of 25±5°C. The processing capacity is 2500 BV / batch. After being adsorbed by the resin, the average concentration of monobutyl phthalate in the effluent water is <0.01mg / L.

[0025] When the adsorption reaches the leakage point (the immediate concentration of monobutyl phthalate in the adsorbed water is 2% of the influent concentration), the adsorption is stopped, and 2mol / L sodium chloride is mixed at a temperature of 30±5°C with 1BV The flow rate of / h flows through the resin bed for desorption. The desorption liquid can be reused, and when the concentration of the phthalic acid monoester reaches 5 mmol / L, th...

Embodiment 2

[0027] Put 3.2ml (about 1 gram) of D201 strong basic anion exchange resin whose functional group is quaternary amino group into a jacketed glass adsorption column (Φ12×160mm). The concentration of monobutyl phthalate in the influent water is `100mg / L. After filtering, adjust the pH value to 6, and pass through the resin bed at a flow rate of 7.5mL / h at 25±5°C. The treatment capacity is 625BV / batch. After being adsorbed by the resin, the average concentration of monobutyl phthalate in the effluent water is <0.06mg / L.

[0028] When the adsorption reaches the leakage point (the immediate concentration of monobutyl phthalate in the adsorbed water is 2% of the influent concentration), the adsorption is stopped, and 2mol / L sodium chloride is mixed at a temperature of 35±5°C with 5 The flow rate of BV / h flows through the resin bed for desorption. The desorption liquid can be reused, and when the concentration of the phthalic acid monoester reaches 5 mmol / L, the desorption liquid i...

Embodiment 3

[0030] Put 3.2ml (about 1 gram) of D201 strong basic anion exchange resin whose functional group is quaternary amino group into a jacketed glass adsorption column (Φ12×160mm). The concentration of monobutyl phthalate in the influent water is 200mg / L. After filtration, the pH value is adjusted to 6, and the flow rate of 6.25BV / h passes through the resin bed under the condition of 25±5°C. The processing capacity is 1200mL / batch. After being adsorbed by the resin, the average concentration of monobutyl phthalate in the effluent water is <0.07mg / L.

[0031] When the adsorption reaches the leakage point (the immediate concentration of monobutyl phthalate in the adsorbed water is 2% of the influent concentration), the adsorption is stopped, and 2mol / L sodium chloride is mixed at a temperature of 30±5°C at a temperature of 0.5 The flow rate of BV / h flows through the resin bed for desorption. The desorption liquid can be reused, and when the concentration of the phthalic acid monoe...

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PUM

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Abstract

The invention provides a method for removing phthalic acid monoester pollutants in a water body through ion exchange resin. Compared with the existing removal technology, the method has the advantages of large adsorption capacity, high selectivity, high separation and regeneration possibility and convenient operation process. The method comprises the following steps: 1) filtering waste water containing phthalic acid monoester pollutants to remove insoluble impurities therein, and then regulating the pH value of the waste water to 6-8; 2) at room temperature, passing the waste water obtained in the step 1) through a bed provided with anion exchange resin; and 3) when the concentration of the effluent water reaches 2% of the concentration of the influent water, stopping adsorption, and desorbing and regenerating the resin with a sodium chloride solution.

Description

Technical field: [0001] The invention relates to a method for selectively removing phthalic acid monoester environmental hormones from water by using anion exchange resin. Background technique: [0002] With the mass production and widespread use of plastic products, more and more organic compounds have been applied to the plastic industry. As a plasticizer, phthalates are mainly used to increase the flexibility of plastic products. Since it is only combined with the plastic skeleton itself through van der Waals force, it will be released into the water environment during production and use. Phthalate esters in natural waters will slowly degrade into phthalate monoesters. Studies have shown that phthalic acid monoester pollutants in natural water bodies have reached the level of universal detection. Since monoesters of phthalates have carcinogenic, teratogenic, mutagenic effects, reproductive toxicity and endocrine disrupting properties, and compared with environmental h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/42C02F101/34
Inventor 许正文李赛超李旭健陆建刚史静承玲刘聪陈敏东李凤英
Owner NANJING YIZHOU ENERGY TECH